Posture detection device, secondary battery manufacturing device, and secondary battery manufacturing system

Abstract

To provide a posture detection device capable of simply inspecting whether batteries are arranged in a normal posture. The attitude detection device collectively detects whether the secondary batteries are in a floating or fallen state, which is an abnormal attitude relative to the normal attitude.

Description

[Technical Field]

[0001] The present disclosure relates to a posture detection device, a secondary battery manufacturing device, and a secondary battery manufacturing system. [Background technology]

[0002] Patent Document 1 discloses a method for inspecting the storage state of a secondary battery in a battery pack. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-64425 Summary of the Invention [Problem to be solved by the invention]

[0004] In secondary battery manufacturing equipment such as charge / discharge testing equipment, a tray containing multiple batteries is introduced into the equipment, and terminals are connected to each battery to charge or discharge. If the batteries on the tray are introduced into the manufacturing equipment in an incorrectly aligned state, problems may occur with the terminal connections, making it impossible to properly test them. Therefore, it is desirable to test whether the batteries introduced into the manufacturing equipment are aligned in the correct state.

[0005] An object of the present disclosure is to provide a posture detection device that can easily inspect whether batteries are arranged in the correct posture. [Means for solving the problem]

[0006] An attitude detection device according to an embodiment of the present disclosure collectively detects whether a secondary battery is in a floating or fallen state, which is an abnormal attitude relative to a normal attitude. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a posture detection device that can easily inspect whether batteries are arranged in a normal posture. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a front view of an attitude detection device according to an embodiment of the present disclosure. [Figure 2] FIG. 4 is a partial plan view for explaining the configuration of the through plate. [Figure 3] 10A and 10B are diagrams illustrating an example of the operation of the attitude detection device when the secondary battery is in a normal attitude. [Figure 4] 10A and 10B are diagrams illustrating an example of the operation of the attitude detection device when the secondary battery is in a fallen state. [Figure 5] 10A and 10B are diagrams illustrating an example of the operation of the attitude detection device when the secondary battery is in a floating state. [Figure 6] FIG. 1 is a block diagram of a secondary battery manufacturing apparatus according to an embodiment of the present disclosure. [Figure 7] 1 is a block diagram of a secondary battery manufacturing system according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0009] The attitude detection device of the present disclosure will be described below with reference to the drawings. In each drawing, U represents the upward direction, D represents the downward direction, L represents the left direction, R represents the right direction, F represents the forward direction, and B represents the backward direction. In the following description, the "vertical direction" refers to directions including the upward and downward directions. The left, right, forward, and backward directions are defined for the convenience of explanation and are not intended to limit the orientation of the device when in use.

[0010] (Configuration of attitude detection device) Fig. 1 is a front view of a posture detection device 1 according to an embodiment of the present disclosure. As shown in Fig. 1, the posture detection device 1 includes a tray 10 for holding a secondary battery C, a detection plate 20, a movement mechanism 30, and a sensor 40. Although Fig. 1 illustrates a state in which a secondary battery C is housed in the tray 10, the secondary battery C is not a component of the posture detection device 1.

[0011] The posture detection device 1 is a device for detecting whether a secondary battery C is held in a normal posture on a tray 10. In this disclosure, the state in which a secondary battery C is supported on the tray 10 at a predetermined height h and in a predetermined orientation (in this embodiment, the longitudinal direction of the secondary battery C is oriented along the up-down direction) as shown in FIG. 1 is referred to as the "normal posture." The normal posture is the posture of the secondary battery C when terminals are connected to the secondary battery C in a secondary battery manufacturing device such as a charge / discharge test device, an initial charger, a voltage test device, or a DC internal resistance test device. Abnormal postures relative to the normal posture include a floating state and a tilted state. The floating state is a state in which the secondary battery C is accommodated in the tray 10 at a height exceeding the predetermined height h. The tilted state is a state in which the secondary battery C accommodated in the tray 10 is not oriented in a predetermined orientation.

[0012] As shown in FIG. 1, the tray 10 is provided with protrusions 11, and the secondary batteries C are supported and housed in the tray 10 by the protrusions 11. Although FIG. 1 shows a state in which multiple secondary batteries C are arranged in the left-right direction, the secondary batteries C are also arranged in the front-to-back direction. In other words, multiple secondary batteries C are arranged two-dimensionally on the tray 10. Although not shown in FIG. 1, holes corresponding to the secondary batteries C are provided in the bottom surface of the tray 10, and terminals can be connected to the lower ends of the secondary batteries C through the holes. In this embodiment, the secondary batteries C are cylindrical batteries.

[0013] The detection plate 20 includes a support plate 21 and a hanging plate 22. The hanging plate 22 is suspended from the support plate 21 via a guide 26 and a coil spring 27. As shown in Fig. 1, the distance between the support plate 21 and the hanging plate 22 when the hanging plate 22 is not in contact with the secondary battery C is D1. Because the hanging plate 22 is suspended from the support plate 21, movement of the hanging plate 22 away from the support plate 21 is restricted, but movement of the hanging plate 22 toward the support plate 21 is not restricted.

[0014] Guide 26 guides hanging plate 22 so that it cannot move forward, backward, left, or right, while allowing it to move up and down relative to support plate 21. Coil spring 27 supports hanging plate 22 so that it stays in a predetermined position, as it would otherwise drop downward. An elastic restoring force acts on coil spring 27, pulling hanging plate 22 upward.

[0015] The hanging plate 22 includes a through plate 23 and a retaining plate 24 located above the through plate 23. The through plate 23 and the retaining plate 24 are fixed to each other with a predetermined gap between them. The through plate 23 has a plurality of through holes 23H formed therein. The through holes 23H are provided corresponding to the plurality of secondary batteries C arranged in the tray 10.

[0016] FIG. 2 is a plan view of the through plate 23 in FIG. 1 as viewed from the direction of arrow II. The outline of the through plate 23 is depicted in solid lines, and the secondary battery C, which is located below the through plate 23 and visible through the through hole 23H, is depicted in dashed lines. The two-dot chain line frame indicates that the outside of the frame is not shown. As shown in FIG. 2, the diameter R1 of the through hole 23H is larger than the outer diameter R2 of the secondary battery C. Therefore, when the through plate 23 is lowered, a secondary battery C in a normal position can pass through the through hole 23H. The through plate 23 is a plate that comes into contact with the secondary battery C and stops the descent of the hanging plate 22 when the secondary battery C is in a tilted state. The specific role of the through plate 23 will be described later.

[0017] The stop plate 24 is a plate that comes into contact with the secondary battery C when the secondary battery C that has passed through the through-hole 23H is in a floating state, thereby stopping the descent of the hanging plate 22. The specific role of the stop plate 24 will be described later.

[0018] A detection rod 25 is disposed on the upper surface of the retaining plate 24. The detection rod 25 passes through a through-hole formed in the support plate 21 to remove weight and extends to above the support plate 21. In the illustrated example, the detection rod 25 passes through the inside of the coil spring 27, and its upper end protrudes above the support plate 21.

[0019] The movement mechanism 30 is a device that moves the detection plate 20 in the up and down direction. Specifically, the movement mechanism 30 includes a cylinder 31, which is connected to the support plate 21 as shown in FIG. 1. The movement mechanism 30 moves the support plate 21 in the up and down direction by moving the cylinder 31. The movement mechanism 30 is supported by a base 50, which is fixed by a fixing part (not shown). When the movement mechanism 30 moves the detection plate 20 in the up and down direction, the distance between the detection plate 20 and the base 50 changes. FIG. 1 shows the state in which the support plate 21 is in the uppermost position. When the support plate 21 is in the uppermost position, the distance between the support plate 21 and the base 50 (which can also be referred to as the distance between the detection plate 20 and the base 50) is x1.

[0020] The sensor 40 is disposed on the upper surface of the support plate 21 so as to be able to detect the movement of the detection rod 25. The sensor 40 detects when the detection rod 25 moves upward relative to the support plate 21 and the upper end of the detection rod 25 reaches a predetermined height ha. For example, the sensor 40 is an optical sensor that detects that the upper end of the detection rod 25 has reached the predetermined height ha by detecting that light emitted so as to cross the predetermined height ha has been blocked or reflected by the upper end of the detection rod 25. When the sensor 40 detects the detection rod 25, the sensor 40 may be configured to output a signal to a control device (not shown). In the following description, the detection by the sensor 40 that the upper end of the detection rod 25 has reached the predetermined height ha may be simply expressed as the sensor 40 detecting the detection rod 25.

[0021] (Detection of secondary battery orientation by orientation detection device) Next, a mechanism for detecting the posture of a secondary battery C using the posture detection device 1 will be described with reference to the drawings. First, a case where the secondary battery C is in a normal posture will be described. The posture detection device detects the posture of the secondary battery C by lowering the detection plate 20 using the movement mechanism 30. FIG. 3 illustrates a state in which the detection plate 20 is lowered a distance dx from the state illustrated in FIG. 1 . As illustrated in FIG. 2 , when the detection plate 20 is lowered, a secondary battery C in a normal posture can pass through the through-hole 23H. Therefore, even if the detection plate 20 is lowered a distance dx as illustrated in FIG. 3 so that the penetration plate 23 is lowered to a position lower than the upper end of the secondary battery C, the penetration plate 23 and the secondary battery C do not come into contact with each other. In this case, the distance between the support plate 21 and the hanging plate 22—that is, the distance between the support plate 21 and the retaining plate 24 in this embodiment—remains D1, and the height of the detection rod 25 relative to the support plate 21 does not change, so the sensor 40 does not detect the detection rod 25. In this way, when the sensor 40 does not detect the battery C even after the detection plate 20 is lowered by the distance dx, it can be determined that the secondary battery C is in a normal position.

[0022] Next, an example of a case where the secondary battery C is in an abnormal position rather than a normal position will be described. Fig. 4 is a diagram showing an example of a case where the secondary battery C is in a tilted state. More specifically, Fig. 4 shows a case where one protrusion 11A of the multiple protrusions 11 provided on the tray 10 is broken, causing the secondary battery C1 adjacent to the protrusion 11A to tilt, and shows the state in which the detection plate 20 is lowered in this case.

[0023] As shown in FIG. 4, if the secondary battery C1 is tilted, the secondary battery C1 cannot pass through the through-hole 23H when the detection plate 20 is lowered. The tilted secondary battery C1 comes into contact with the through-hole 23, preventing the suspension plate 22, including the through-hole 23, from descending any further. If the movement mechanism 30 continues to lower the support plate 21 while the secondary battery C1 and the through-hole 23 are in contact, the suspension plate 22 remains stationary while only the support plate 21 continues to descend, bringing the support plate 21 closer to the retaining plate 24. When the support plate 21 has descended a distance dxa (≦dx) as shown in FIG. 4, the distance between the support plate 21 and the retaining plate 24 becomes a distance D2, which is smaller than the original distance D1. When the support plate 21 and the retaining plate 24 approach each other in this manner, the detection rod 25 on the upper surface of the retaining plate 24 protrudes further upward relative to the support plate 21 and reaches a predetermined height ha, which is detected by the sensor 40. The sensor 40 can detect that the secondary battery C is in an abnormal position by detecting the detection rod 25 reaching a predetermined height ha. In this way, the sensor 40 detects a change in the distance between the support plate 21 and the hanging plate 22 and outputs a signal corresponding to contact between the detection plate 20 and the secondary battery C1, thereby detecting that the secondary battery C1 is in an abnormal position.

[0024] Another example of a case where a secondary battery C is in an abnormal position will be described. FIG. 5 shows the state in which the detection plate 20 is lowered when a foreign object 60 has entered the tray 10 and the secondary battery C2 placed on the foreign object 60 exceeds a predetermined height h, i.e., the secondary battery C2 is floating. In the state shown in FIG. 5, the secondary batteries C, including the secondary battery C2, are housed in a predetermined orientation (vertical orientation), allowing each secondary battery C to pass through the through-hole 23H and not come into contact with the through-hole 23. However, as the detection plate 20 is further lowered, the floating secondary battery C2 comes into contact with the underside of the retaining plate 24, preventing the suspension plate 22 and the retaining plate 24 from descending any further. If the movement mechanism 30 continues to lower the support plate 21 while the secondary battery C2 and the retaining plate 24 are in contact, the suspension plate 22 remains stationary and only the support plate 21 continues to descend, bringing the support plate 21 closer to the retaining plate 24. In the state shown in Figure 5 where support plate 21 has descended a distance dxb (≤ dx), the distance between support plate 21 and retaining plate 24 becomes a distance D2 which is smaller than the original distance D1. When support plate 21 and retaining plate 24 approach each other in this way, similar to the example shown in Figure 4, sensor 40 detects a change in the height of detection rod 25, detects a change in the distance between support plate 21 and hanging plate 22, and outputs a signal corresponding to contact between detection plate 20 and secondary battery C1. This makes it possible to detect the presence of a secondary battery C2 in an abnormal position.

[0025] As described above, the posture detection device 1 according to this embodiment can easily inspect whether batteries are arranged in the correct posture. Specifically, whether the secondary batteries C are in a floating or tilted state can be detected simultaneously by lowering the detection plate 20 relative to the secondary batteries C. Furthermore, compared to a configuration that includes separate detectors for detecting a floating state and a tilted state, the cost required to install the device can be reduced and the overall device can be made smaller.

[0026] Each component of the posture detection device 1 may be controlled by a control device (not shown). For example, when the sensor 40 detects the detection rod 25, the sensor 40 outputs a signal to the control device, and the control device that receives the signal may stop the movement mechanism 30 from lowering the detection plate 20 at that point and return the detection plate 20 to its original position. The control device that receives the signal may be configured to issue an alert or notification to an administrator.

[0027] In this embodiment, the materials of the support plate 21, the through plate 23, and the retaining plate 24 that make up the detection plate 20 are not particularly limited as long as they have properties suitable for detecting the posture of the secondary battery as described above. The through plate 23 is preferably a resin plate, and more preferably an insulating resin plate. If the through plate 23 is a resin plate, it is possible to prevent the secondary battery C from being crushed and damaged when the through plate 23 comes into contact with the secondary battery C. Furthermore, if the through plate 23 is insulating, it is possible to prevent a short circuit of the secondary battery C. The support plate 21, the retaining plate 24, and the base 50 may be, for example, a stainless steel plate, and each plate may be hollowed out to reduce weight.

[0028] In this embodiment, a guide 26 is passed through the hanging plate 22 that extends in the vertical direction. The guide 26 prevents the hanging plate 22 from shaking left and right or front and back when the hanging plate 22 comes into contact with the secondary battery C, making it less likely that false detection or missed detection will occur.

[0029] In this embodiment, a configuration is adopted in which a sensor 40 and a detection rod 25 are arranged as shown in Figure 1 to detect contact between the detection plate 20 and the secondary battery C. That is, the sensor 40 is arranged above the support plate 21, and the detection rod 25 is fixed to the upper surface of the retaining plate 24 and penetrates the support plate 21. The sensor 40 detects changes in the distance between the support plate 21 and the hanging plate 22 by detecting changes in the height of the detection rod 25 relative to the support plate 21. With this configuration, contact between the detection plate 20 and the secondary battery C can be accurately detected using a simple combination of components.

[0030] In this embodiment, the hanging plate 22 is suspended from the support plate 21 via a coil spring 27. When the distance between the support plate 21 and the hanging plate 22 becomes smaller than D1, the coil spring 27 generates a force that separates the support plate 21 and the hanging plate 22. This makes it possible to adjust the force required to bring the distance between the support plate 21 and the hanging plate 22 closer to a predetermined distance D2, thereby preventing erroneous detection. The position at which the coil spring 27 is attached is not particularly limited.

[0031] (Secondary battery manufacturing equipment) The present disclosure also relates to a secondary battery manufacturing apparatus. FIG. 6 is a block diagram showing the configuration of a secondary battery manufacturing apparatus 100 according to an embodiment of the present disclosure. As shown in FIG. 6, the secondary battery manufacturing apparatus 100 includes a posture detection device 1 and an inspection device 2. The inspection device 2 is a device that connects terminals to secondary batteries C to charge or discharge them, and is, for example, a charge / discharge inspection device, an initial charging device, a voltage inspection device, or a DC internal resistance inspection device. According to the secondary battery manufacturing apparatus 100 according to this embodiment, the posture detection device 1 first detects whether the posture of the secondary batteries C housed in the tray 10 is normal, and then the tray 10 is moved to the inspection device 2 to charge or discharge the secondary batteries C. By detecting the posture of the secondary batteries C using the posture detection device 1, the inspection device 2 can properly connect terminals to each secondary battery C. The secondary battery manufacturing apparatus 100 may further include a transport device for transporting the tray 10 housing the secondary batteries C from the posture detection device 1 to the inspection device 2.

[0032] For example, if the posture of the secondary battery C detected by the posture detection device 1 is abnormal, the efficiency of manufacturing the secondary battery C can be improved by notifying the manager and returning the secondary battery C to a normal posture before moving it to the inspection device 2. Alternatively, the secondary battery C may be returned to a normal posture using a device that changes the posture of the secondary battery C before being moved to the inspection device 2 without notifying the manager.

[0033] (Secondary battery manufacturing system) The present disclosure also relates to a secondary battery manufacturing system. FIG. 7 is a block diagram showing the configuration of a secondary battery manufacturing system 200 according to an embodiment of the present disclosure. As shown in FIG. 7 , the secondary battery manufacturing system 200 according to the present disclosure includes a posture detection device 1, a secondary battery manufacturing device 3, and a conveying device 4. The secondary battery manufacturing device 3 is a device that connects terminals to secondary batteries C to charge or discharge them, such as a charge / discharge inspection device, an initial charging device, a voltage inspection device, or a DC internal resistance inspection device. The conveying device 4 is a device that conveys trays 10 containing secondary batteries C from the posture detection device 1 to the secondary battery manufacturing device 3. According to the secondary battery manufacturing system 200 according to this embodiment, the posture detection device 1 first detects whether the posture of the secondary batteries C contained in the trays 10 is normal, and then the conveying device 4 moves the trays 10 to the secondary battery manufacturing device 3 to charge or discharge the secondary batteries C. By detecting the posture of the secondary batteries C using the posture detection device 1, terminals can be appropriately connected to each secondary battery C in the secondary battery manufacturing device 3.

[0034] For example, if the posture of the secondary battery C detected by the posture detection device 1 is abnormal, the manager is notified and the secondary battery C is returned to the normal posture and then moved to the manufacturing device 3 via the conveying device 4, thereby improving the manufacturing efficiency of the secondary battery C. Alternatively, the conveying device 4 may be configured to convey only trays 10 in which all secondary batteries C are in the normal posture to the manufacturing device 3, and to convey trays 10 containing secondary batteries C with abnormal postures to a position off the original conveying path.

[0035] Although the attitude detection device, secondary battery manufacturing device, and secondary battery manufacturing system of the present disclosure have been described above with reference to specific embodiments, the present disclosure is not limited to these embodiments.

[0036] Regarding the configuration for detecting contact between the detection plate 20 and the secondary battery C, the position of the detection rod 25 is not limited to the upper surface of the retaining plate 24 but may be other portions that move with the suspension plate 22, such as the side surface of the retaining plate 24. The detection rod 25 may penetrate the support plate 21 or may protrude above the support plate 21 via the side of the support plate 21. Instead of the rod-shaped detection rod 25, a detection member with a different shape may be used. The position of the sensor 40 is not limited to the upper surface of the support plate 21 but may be appropriately positioned depending on the position of the detection member, such as the detection rod 25. In addition, although the above embodiment illustrates an example in which the sensor 40 is an optical sensor, other types of sensors may also be used, such as a pressure sensor. When a pressure sensor is used, a configuration may be adopted in which the detection rod comes into contact with the pressure sensor when the detection member moves to a predetermined height relative to the support plate, thereby detecting the movement of the detection member. Alternatively, a change in the distance between the support plate 21 and the suspension plate 22 may be directly detected without using a detection member, such as the detection rod 25. For example, a pressure sensor may be placed on the retaining plate 24 so that the pressure sensor comes into contact with the underside of the support plate 21 when the distance between the support plate 21 and the hanging plate 22 falls below a predetermined distance, thereby detecting a change in the distance between the support plate 21 and the hanging plate 22.

[0037] The type of secondary battery C is not particularly limited, but may be, for example, a lithium ion battery. In the above embodiment, an example was shown in which the secondary battery C was a cylindrical battery, but the posture detection device of the present disclosure may also be applied to a prismatic battery. The through-hole provided in the through-plate is not particularly limited, as long as it has dimensions larger than the secondary battery at least in a plan view and allows a secondary battery in a normal posture to pass through when the through-plate is lowered. The shape of the through-hole may be, for example, rectangular. The shapes of the through-hole and the secondary battery in a plan view may be the same or different.

[0038] The present disclosure includes the following contents (1) to (9). (1) An attitude detection device according to an embodiment of the present disclosure collectively detects whether a secondary battery is in a floating or tilted state, which is an abnormal attitude relative to the normal attitude.

[0039] (2) In (1) above, the posture detection device has a tray for holding a secondary battery, a detection plate, a moving mechanism for moving the detection plate closer to the tray, and a sensor, and is configured so that when the moving mechanism moves the detection plate closer to the tray, the detection plate does not come into contact with a secondary battery held on the tray in the normal posture, but comes into contact with a secondary battery in the floating state or the fallen state, and the sensor may detect the floating state and the fallen state simultaneously by outputting a signal corresponding to the contact between the detection plate and the secondary battery.

[0040] (3) In (2) above, the detection plate may include a support plate and a hanging plate suspended from the support plate, the moving mechanism may move the support plate in the vertical direction, the sensor may detect a change in the distance between the support plate and the hanging plate, the hanging plate may include a through plate and a stop plate located above the through plate, the through plate and the stop plate may be fixed to each other, and the through plate may have a through hole having dimensions larger than the secondary battery in a planar view.

[0041] (4) In the above (3), the through plate may be a resin plate.

[0042] (5) In the above (3) or (4), a guide extending in the vertical direction may be passed through the hanging plate.

[0043] (6) In any of (3) to (5) above, the sensor may be positioned above the support plate, a detection rod may be fixed to the upper surface of the retaining plate, the detection rod may penetrate the support plate, and the sensor may detect a change in the distance between the support plate and the hanging plate by detecting a change in the height of the detection rod relative to the support plate.

[0044] (7) In any one of the above (3) to (6), the suspension plate may be suspended from the support plate via a coil spring.

[0045] (8) A secondary battery manufacturing apparatus according to an embodiment of the present disclosure includes the attitude detection device according to any one of (1) to (7) above.

[0046] (9) A secondary battery manufacturing system according to an embodiment of the present disclosure includes a secondary battery manufacturing apparatus and the attitude detection device according to any one of (1) to (7) above. [Explanation of symbols]

[0047] 1. Attitude detection device 10 trays 11,11A protrusion 20 Detection plate 21 Support plate 22 Hanging board 23 Penetration plate 23H through hole 24 Stop plate 25 Detection rod 26 Guide 27 Coil spring 30 Moving mechanism 31 cylinders 40 sensors 50 base 60 Foreign matter C,C1,C2 Secondary battery 2. Inspection equipment 3,100 Secondary battery manufacturing equipment 4. Conveyor equipment 200 Secondary battery manufacturing system

Claims

1. An attitude detection device that collectively detects whether a secondary battery is in a floating or fallen state, which is an abnormal attitude relative to the normal attitude.

2. The attitude detection device is a tray for holding the secondary battery; A detection plate; a moving mechanism for moving the detection plate closer to the tray; a sensor; When the detection plate is moved closer to the tray by the movement mechanism, the detection plate does not come into contact with the secondary battery held on the tray in the normal posture, but comes into contact with the floating or fallen secondary battery, 2. The attitude detection device according to claim 1, wherein the sensor detects the floating state and the tilted state simultaneously by outputting a signal in response to contact between the detection plate and the secondary battery.

3. The detection plate is A support plate; a hanging plate suspended from the support plate, The movement mechanism moves the support plate in a vertical direction, The sensor detects a change in the distance between the support plate and the hanging plate, The hanging plate includes a through plate and a stop plate located above the through plate, The through plate and the retaining plate are fixed to each other, The through-hole plate is provided with a through-hole having a size larger than that of the secondary battery in a plan view. The attitude detection device according to claim 2 .

4. The posture detection device according to claim 3 , wherein the through plate is a resin plate.

5. 5. The posture detection device according to claim 3, wherein a guide extending in the vertical direction is passed through the hanging plate.

6. The sensor is disposed above the support plate, a detection rod is fixed to an upper surface of the retaining plate, and the detection rod penetrates the support plate; 5. The posture detection device according to claim 3, wherein the sensor detects a change in the distance between the support plate and the hanging plate by detecting a change in the height of the detection rod relative to the support plate.

7. 5. The posture detection device according to claim 3, wherein the suspension plate is suspended from the support plate via a coil spring.

8. A secondary battery manufacturing apparatus comprising the attitude detection device according to claim 1 .

9. A secondary battery manufacturing system comprising: a secondary battery manufacturing apparatus; and the attitude detection device according to claim 1 .

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