A diaphragm initial position correction mechanism and a correction method

Abstract

The application provides a diaphragm initial position deviation correction mechanism and a deviation correction method. The deviation correction mechanism comprises a base, a sliding seat, a first translation driving mechanism, a packaging platform and a deviation correction platform. The packaging platform is provided with a first position sensor and a plurality of first air suction holes. The first position sensor is used for detecting whether the side edge position of the diaphragm is in position. The deviation correction platform is provided with a second position sensor and a plurality of second air suction holes. The second position sensor is used for detecting whether the leading end position of the diaphragm is in position. During deviation correction, the leading end part of the diaphragm is sucked by the second air suction hole, the diaphragm is driven by the deviation correction platform to adjust the position in the width direction, and when the side edge of the diaphragm just passes the first position sensor, the specified position is reached, the deviation correction is completed, the deviation correction speed is fast, and the film quality of the lithium battery piece is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery piece packaging, and particularly relates to a diaphragm initial position deviation correction mechanism and a deviation correction method. BACKGROUND

[0002] In the structure of a lithium battery, a diaphragm is one of key inner layer components. The performance of the diaphragm determines the interface structure, internal resistance and the like of the battery, and directly affects the capacity, cycle and safety performance and the like of the battery. A diaphragm with excellent performance plays an important role in improving the comprehensive performance of the battery. The main function of the diaphragm is to separate the positive and negative electrodes of the battery to prevent the short circuit caused by the contact of the two electrodes, and the diaphragm also has the function of allowing the electrolyte ions to pass through.

[0003] In the automatic packaging process of the lithium battery, it is necessary to ensure that the position of the diaphragm in the width direction is kept within a stable specification to completely cover the battery piece. After the wrapping of the diaphragm on the inner core of each lithium battery piece is completed, the diaphragm needs to be cut to start a new single group operation. However, the freedom of the leading end of the diaphragm after cutting is relatively large. Before the operation starts, the two sides of the diaphragm cannot be stably kept within the operation area range of the packaging platform. Therefore, a diaphragm initial position deviation correction mechanism is urgently needed. SUMMARY

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present application is to provide a diaphragm initial position deviation correction mechanism and a deviation correction method.

[0005] To achieve the above purpose, the technical scheme adopted by the present application to solve its technical problems is as follows: a diaphragm initial position deviation correction mechanism, comprising:

[0006] a base;

[0007] a sliding seat movably installed on the base;

[0008] a first translation driving mechanism installed between the base and the sliding seat, the first translation driving mechanism driving the sliding seat to move on the base along the length direction of the diaphragm;

[0009] a packaging platform fixedly installed on the sliding seat, the packaging platform being provided with a first position sensor and a plurality of first air suction holes, the first position sensor being used to detect whether the position of one side edge of the diaphragm is in place;

[0010] a deviation correction platform installed on the sliding seat through a second translation driving mechanism, the second translation driving mechanism driving the deviation correction platform to move on the sliding seat along the width direction of the diaphragm; the deviation correction platform being provided with a second position sensor and a plurality of second air suction holes, the second position sensor being used to detect whether the position of the leading end of the diaphragm is in place;

[0011] A controller is in signal connection with the first position sensor, the second position sensor, the first translation driving mechanism and the second translation driving mechanism respectively, receives the signal detected by the second position sensor whether the leading end of the diaphragm is in position, processes and sends out the instruction signal for controlling the action of the first translation driving mechanism; the controller also receives the signal detected by the first position sensor whether the side edge of the diaphragm is in position, processes and sends out the instruction signal for controlling the action of the second translation driving mechanism.

[0012] By adopting the technical scheme of the present application, when rectifying, the leading end of the diaphragm is sucked by the second air suction hole, the diaphragm is adjusted in the width direction by the rectifying platform, and when the side edge of the diaphragm just passes the first position sensor, the specified position is reached, the rectification is completed, and the rectification speed is fast; the diaphragm quality of the lithium battery piece is ensured.

[0013] Further, the first translation driving mechanism comprises a first sliding rail, a first motor and a first screw rod, the output shaft of the first motor is connected to the screw rod end of the first screw rod, the sliding seat is installed on the nut of the first screw rod, and the first motor drives the screw rod of the first screw rod to rotate and then drives the sliding seat to move along the first sliding rail.

[0014] By adopting the preferred scheme, the moving stability is improved.

[0015] Further, the second translation driving mechanism comprises a second sliding rail, a second motor and a second screw rod, the output shaft of the second motor is connected to the screw rod end of the second screw rod, the rectifying platform is installed on the nut of the second screw rod, and the second motor drives the screw rod of the second screw rod to rotate and then drives the rectifying platform to move along the second sliding rail.

[0016] By adopting the preferred scheme, the moving stability is improved.

[0017] Further, the nut of the second screw rod is connected with a detection rod, the sliding seat is installed with a guide bar parallel to the second sliding rail, the guide bar is installed with three photoelectric sensors, and the positions of the three photoelectric sensors correspond to one side limit position, a reset original position and the other side limit position of the rectifying platform respectively.

[0018] By adopting the preferred scheme, the moving stroke of the rectifying platform is conveniently controlled.

[0019] Further, the second motor is a servo motor or a motor with an encoder.

[0020] By adopting the preferred scheme, the moving precision of the rectifying platform is improved.

[0021] Further, the plurality of second air suction holes of the rectifying platform are arranged in a straight line along the width direction of the diaphragm, and the opening of the second air suction hole is arranged on the edge position of the upper surface of the rectifying platform close to the packaging platform.

[0022] The preferred scheme described above can stably adsorb the tip of the diaphragm.

[0023] Furthermore, a portion of the openings of the first air intake holes are located on the upper surface of the packaging platform near the edge of the correction platform, while the other portion of the openings of the first air intake holes are arranged along the length of the diaphragm on the upper surface of the packaging platform.

[0024] By adopting the above-mentioned preferred scheme, the diaphragm can be reliably adsorbed after the correction is completed, improving the flatness of the diaphragm. It also facilitates a second correction after the correction platform resets if the first correction stroke is unsuccessful.

[0025] Furthermore, the first and second suction ports are connected to the suction port of the vacuum generator via pipelines, and the pipelines are respectively equipped with a first gas valve and a second gas valve for controlling the opening and closing of the first and second suction ports.

[0026] The above-mentioned preferred scheme facilitates the control of the air intake opening and closing.

[0027] A method for correcting the initial position of a diaphragm includes the following steps:

[0028] Step 1: The first translation drive mechanism drives the packaging platform and the correction platform of the slide to translate along the base. The air nozzle blows air to blow the diaphragm to the side of the moving direction of the packaging platform. The tip of the diaphragm is laid on the packaging platform and the correction platform. After the second position sensor detects that the diaphragm is in place, the air nozzle stops blowing air.

[0029] Step 2: The second suction port on the correction platform draws air in. The first translation drive mechanism continues to drive the packaging platform and the correction platform of the slide to translate along the base. The correction platform slides relative to the diaphragm. The suction force of the second suction port on the diaphragm is much smaller than the driving force of the first translation drive mechanism on the correction platform. However, the suction force of the second suction port can keep the diaphragm in a taut state, which is beneficial for the sensor to detect the position of the diaphragm.

[0030] Step 3: After the second position sensor detects that the diaphragm is not in place, the first translation drive mechanism stops moving;

[0031] Step 4: The second translation drive mechanism moves the correction platform and the diaphragm tip adsorbed on the correction platform together; when the first position sensor detects a change in the position state of the diaphragm edge, the second translation drive mechanism stops moving, the first air intake hole on the packaging platform draws in air, and the diaphragm is adsorbed onto the surface of the packaging platform for subsequent lithium battery cell packaging operations.

[0032] By adopting the above-mentioned correction method, correction can be completed quickly during the packaging platform reset process, thereby improving the coating quality of lithium battery cells. Attached Figure Description

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only aim to some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0034] Figure 1 is a structural schematic diagram of an embodiment of the present application;

[0035] Figure 2 is a perspective schematic diagram at the deviation rectification platform;

[0036] Figure 3 is a front view schematic diagram at the deviation rectification platform.

[0037] Names of corresponding components represented by numbers and letters in the drawings:

[0038] 10 - diaphragm feeding mechanism; 101 - diaphragm; 31 - base; 32 - sliding seat; 33 - first translation driving mechanism; 331 - first motor; 332 - first lead screw; 34 - packaging platform; 341 - first position sensor; 342 - first air suction hole; 35 - deviation rectification platform; 351 - second position sensor; 352 - second air suction hole; 36 - second translation driving mechanism; 361 - second sliding rail; 362 - second motor; 363 - second lead screw; 364 - detection rod; 365 - photoelectric sensor; 40 - air blowing nozzle. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0040] As shown in Figures 1-3 , a diaphragm initial position deviation rectification mechanism comprises:

[0041] a base 31;

[0042] a sliding seat 32 movably mounted on the base 31;

[0043] a first translation driving mechanism 33 mounted between the base 31 and the sliding seat 32, the first translation driving mechanism 33 driving the sliding seat 32 to move on the base 31 along the length direction of the diaphragm;

[0044] An encapsulation platform 34 is fixedly installed on the sliding base 32, and the encapsulation platform 34 is provided with a first position sensor 341 and a plurality of first air suction holes 342, the first position sensor 341 being used to detect whether the position of one side edge of the diaphragm 101 is in place;

[0045] A deviation rectifying platform 35 is installed on the sliding base 32 via a second translation driving mechanism 36, the second translation driving mechanism 36 driving the deviation rectifying platform 35 to move on the sliding base 32 along the width direction of the diaphragm, and the deviation rectifying platform 35 is provided with a second position sensor 351 and a plurality of second air suction holes 352, the second position sensor 351 being used to detect whether the position of the leading end of the diaphragm 101 is in place;

[0046] A controller is signal-connected with the first position sensor 341, the second position sensor 351, the first translation driving mechanism 33 and the second translation driving mechanism 36 respectively, the controller receiving a signal of whether the position of the leading end of the diaphragm is in place detected by the second position sensor 351, and sending an instruction signal for controlling the first translation driving mechanism 33 to act after processing, and the controller also receiving a signal of whether the position of one side edge of the diaphragm is in place detected by the first position sensor 341, and sending an instruction signal for controlling the second translation driving mechanism 36 to act after processing.

[0047] The beneficial effect of the above technical solution is that, during deviation rectification, the leading end of the diaphragm is sucked by the second air suction hole, the deviation rectifying platform drives the diaphragm to adjust the position in the width direction, and the diaphragm reaches the specified position when the side edge of the diaphragm just passes the first position sensor, thus completing the deviation rectification and ensuring the coating quality of the lithium battery piece.

[0048] As shown in Figure 1 , in some other embodiments of the present application, the first translation driving mechanism 33 comprises a first sliding rail, a first motor 331 and a first lead screw 332, the output shaft of the first motor 331 being connected to the screw end of the first lead screw 332, the sliding base 32 being installed on the nut of the first lead screw 332, and the first motor 331 driving the screw of the first lead screw to rotate and in turn driving the sliding base 32 to move along the first sliding rail. The beneficial effect of the above technical solution is that the moving stability is improved.

[0049] As shown in Figure 2 , 3 , in some other embodiments of the present application, the second translation driving mechanism 36 comprises a second sliding rail 361, a second motor 362 and a second lead screw 363, the output shaft of the second motor 362 being connected to the screw end of the second lead screw 363, the deviation rectifying platform 35 being installed on the nut of the second lead screw 363, and the second motor 362 driving the screw of the second lead screw 363 to rotate and in turn driving the deviation rectifying platform 35 to move along the second sliding rail 361. The beneficial effect of the above technical solution is that the moving stability is improved.

[0050] As shown in Figure 3As shown in the drawings, in some embodiments of the present application, a detection rod 364 is connected to the nut of the second screw rod, and a guide bar parallel to the second slide rail 361 is installed on the sliding seat, and three photoelectric sensors 365 are installed on the guide bar, and the positions of the three photoelectric sensors correspond to the one-side limit position, the reset origin position and the other-side limit position of the deviation rectification platform 35 respectively. The second motor 362 is a servo motor or a motor with an encoder. The beneficial effects of the above technical solution are: convenient control of the moving stroke of the deviation rectification platform, and improvement of the moving precision of the deviation rectification platform.

[0051] As shown in the drawings, Figure 2 As shown in the drawings, in some embodiments of the present application, the second air suction holes 352 of the deviation rectification platform 35 are arranged in a straight line along the width direction of the diaphragm, and the openings of the second air suction holes 352 are arranged on the edge of the upper surface of the deviation rectification platform 35 close to the packaging platform 34. The beneficial effects of the above technical solution are: stable adsorption of the leading end of the diaphragm.

[0052] As shown in the drawings, Figure 2 As shown in the drawings, in some embodiments of the present application, the openings of a part of the first air suction holes 342 are arranged on the edge of the upper surface of the packaging platform 34 close to the deviation rectification platform 35, and the openings of the other part of the first air suction holes 342 are arranged on the upper surface of the packaging platform 34 along the length direction of the diaphragm. The beneficial effects of the above technical solution are: reliable adsorption of the diaphragm after deviation rectification, and improvement of the flatness of the diaphragm. It is also convenient to perform secondary deviation rectification after the deviation rectification platform is reset when the first deviation rectification stroke of the deviation rectification platform is unsuccessful.

[0053] In some embodiments of the present application, the first air suction holes and the second air suction holes are connected to the air suction port of the vacuum generating device through pipelines, and a first air valve and a second air valve for controlling the on-off air of the first air suction holes and the second air suction holes are arranged on the pipelines respectively. The beneficial effects of the above technical solution are: convenient control of the on-off air of the air suction holes.

[0054] A diaphragm initial position deviation rectification method, comprising the following steps:

[0055] Step 1: The packaging platform 34 and the deviation rectification platform 35 of the sliding seat 32 are driven to translate along the base 31 by the first translation driving mechanism 33, the diaphragm 101 at the lower edge of the diaphragm supply mechanism 10 is blown to the side of the moving direction of the packaging platform 34 by blowing air through the air blower 40, the leading end of the diaphragm 101 is laid on the packaging platform 34 and the deviation rectification platform 35, and after the second position sensor 351 detects that the diaphragm is in position, the air blower 40 stops blowing air;

[0056] Step 2, the second suction hole 352 on the rectification platform 35 sucks air, and the first translation driving mechanism 33 continues to drive the packaging platform 34 and the rectification platform 35 on the slide base 31 to translate. At this time, the rectification platform slides relative to the diaphragm, and the suction force of the second suction hole on the diaphragm is much smaller than the driving force of the first translation driving mechanism on the rectification platform, but the suction force of the second suction hole can make the diaphragm in a straightened state, which is conducive to the sensor detecting the position state of the diaphragm;

[0057] Step 3, after the second position sensor 351 detects that the diaphragm is not in place, the first translation driving mechanism 33 stops moving;

[0058] Step 4, the second translation driving mechanism 36 drives the rectification platform 35 and the leading end of the diaphragm adsorbed on the rectification platform to move; when the first position sensor 341 detects that the edge of the diaphragm changes in the in-place state, the second translation driving mechanism 36 stops moving, the first suction hole 342 on the packaging platform 34 sucks air, and the diaphragm 101 is adsorbed on the surface of the packaging platform 34, and subsequent packaging work of the lithium battery piece is performed.

[0059] By using the above-mentioned rectification method, the rectification can be quickly completed during the resetting of the packaging platform, and the film coating quality of the lithium battery piece is improved.

[0060] The above-mentioned embodiments only serve to illustrate the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A diaphragm initial position correction mechanism, characterized in that, The application relates to a diaphragm initial position rectifying mechanism, which comprises the following components: a base; a sliding base movably mounted on the base; a first translation driving mechanism mounted between the base and the sliding base, which drives the sliding base to move along the diaphragm length direction on the base; an encapsulating platform fixedly mounted on the sliding base, which is provided with a first position sensor and a plurality of first air suction holes, and the first position sensor is used for detecting whether the diaphragm side edge position is in place; a rectifying platform mounted on the sliding base through a second translation driving mechanism, which drives the rectifying platform to move along the diaphragm width direction on the sliding base; the rectifying platform is provided with a second position sensor and a plurality of second air suction holes, and the second position sensor is used for detecting whether the diaphragm leading end position is in place; the plurality of second air suction holes of the rectifying platform are arranged in a straight line along the diaphragm width direction, and the openings of the second air suction holes are arranged on the edge of the upper surface of the rectifying platform close to the encapsulating platform; the openings of a part of the first air suction holes are arranged on the edge of the upper surface of the encapsulating platform close to the rectifying platform, and the openings of the other part of the first air suction holes are arranged on the upper surface of the encapsulating platform along the diaphragm length direction; a controller is signal-connected with the first position sensor, the second position sensor, the first translation driving mechanism and the second translation driving mechanism respectively, the controller receives the signal of whether the diaphragm leading end is in place detected by the second position sensor, processes the signal and then sends an instruction signal for controlling the action of the first translation driving mechanism; the controller also receives the signal of whether the diaphragm side edge is in place detected by the first position sensor, processes the signal and then sends an instruction signal for controlling the action of the second translation driving mechanism.

2. The diaphragm initial position correction mechanism according to claim 1, characterized by The first translation driving mechanism comprises a first sliding rail, a first motor and a first screw rod, the output shaft of the first motor is connected to the screw rod end of the first screw rod, the sliding base is mounted on the nut of the first screw rod, and the first motor drives the screw rod of the first screw rod to rotate and then drives the sliding base to move along the first sliding rail.

3. The diaphragm initial position correction mechanism according to claim 1, characterized by The second translation driving mechanism comprises a second sliding rail, a second motor and a second screw rod, the output shaft of the second motor is connected to the screw rod end of the second screw rod, the rectifying platform is mounted on the nut of the second screw rod, and the second motor drives the screw rod of the second screw rod to rotate and then drives the rectifying platform to move along the second sliding rail.

4. The diaphragm initial position correction mechanism according to claim 3, characterized by A detection rod is connected to the nut of the second screw rod, a guide strip parallel to the second sliding rail is mounted on the sliding base, three photoelectric sensors are mounted on the guide strip, and the positions of the three photoelectric sensors correspond to one side limit position, a reset original position and the other side limit position of the rectifying platform respectively.

5. The diaphragm initial position correction mechanism according to claim 4, characterized in that The second motor is a servo motor.

6. The diaphragm initial position correction mechanism according to claim 1, wherein The first air suction holes and the second air suction holes are connected with the air suction port of a vacuum generating device through pipelines, and the pipelines are respectively provided with a first air valve and a second air valve for controlling the air on-off of the first air suction holes and the second air suction holes.

7. A method for correcting the initial position of a diaphragm, characterized by The diaphragm initial position rectifying mechanism comprises the following steps: Step 1, the packaging platform and the deviation rectifying platform of the slide base are driven to translate along the base by the first translation driving mechanism, the diaphragm is blown to one side of the moving direction of the packaging platform by blowing through the blowing nozzle, the leading end of the diaphragm is laid on the packaging platform and the deviation rectifying platform, and after the second position sensor detects that the diaphragm is in place, the blowing nozzle stops blowing; Step 2, the second air suction hole on the deviation rectifying platform sucks air, the first translation driving mechanism continues to drive the packaging platform and the deviation rectifying platform of the slide base to translate along the base, and the deviation rectifying platform slides relative to the diaphragm; Step 3, after the second position sensor detects that the diaphragm is not in place, the first translation driving mechanism stops moving; Step 4, the second translation driving mechanism drives the deviation rectifying platform and the leading end of the diaphragm adsorbed on the deviation rectifying platform to move together; when the first position sensor detects that the in-place state of the edge of the diaphragm changes, the second translation driving mechanism stops moving, the first air suction hole on the packaging platform sucks air, the diaphragm is adsorbed on the surface of the packaging platform, and subsequent packaging work of the lithium battery piece is performed.

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