Battery core hot needle and hot hole mechanism using same

Abstract

The present invention discloses a battery core hot pin and a hot punch mechanism using the same. The battery core hot pin is hollow and tubular, comprising an air inlet, an inner cavity, and an air outlet that are sequentially connected. Through this method, the present invention can perform non-contact heating on the inner wall of the battery core to avoid damaging the battery core.

Description

Technical Field

[0001] The present invention relates to the field of battery production equipment, and in particular to a battery core ironing needle and a hole ironing mechanism using the same. Background Art

[0002] During the battery production process, the wound battery cell includes a hollow cavity, and then a core rod needs to be inserted into the hollow cavity of the battery cell. To this end, the hollow cavity of the battery cell needs to be perforated to make the inner wall of the hollow cavity smooth, which is convenient for the quick insertion of the core rod.

[0003] Existing hot-drilling mechanisms use a contact-type hot-drilling method, inserting a heated hot-drilling needle into the hollow cavity of a battery cell and heating the cell by contacting the hot-drilling needle with the inner wall of the cell. However, using this contact-type hot-drilling method, especially if the battery cell or hot-drilling needle is misaligned, the hot-drilling needle can easily scratch the separator when it contacts the inner wall of the cell, rendering the cell useless. Summary of the Invention

[0004] The present invention mainly provides a battery core ironing needle and a hole ironing mechanism using the same, so as to solve the problem that the contact hole ironing in the prior art easily damages the battery core.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a battery cell ironing needle, which is in the shape of a hollow tube and includes an air inlet, an inner cavity and an air outlet connected in sequence.

[0006] According to an embodiment of the present invention, the battery cell ironing needle includes a main body tube and a needle tip located at one end of the main body tube.

[0007] According to an embodiment of the present invention, the air inlet is provided at the end of the main tube away from the needle tip, and the air outlet is provided on the side wall of the main tube.

[0008] In order to solve the above technical problems, another technical solution adopted by the present invention is: to provide a perforation mechanism, which includes the battery cell perforation needle described in any one of the above items, and the perforation mechanism also includes a hot air component, which is connected to the air inlet of the battery cell perforation needle to provide hot air to the battery cell perforation needle.

[0009] According to an embodiment of the present invention, the ironing mechanism further includes a driving device, which is connected to the battery core ironing needle to drive the battery core ironing needle forward or backward.

[0010] According to one embodiment of the present invention, the driving device includes: a mounting plate; a first driving component disposed on the mounting plate; and a driving block connected to the first driving component for mounting the battery core ironing needle.

[0011] According to an embodiment of the present invention, the ironing mechanism further includes a pressure detection device, and the pressure detection device is used to detect pressure information of the battery cell ironing needle.

[0012] According to an embodiment provided by the present invention, the pressure detection device includes: a base plate; a first slide rail, which is arranged on the base plate; a first slider, which is slidably arranged on the first slide rail and connected to the driving block of the driving device; a second slide rail, which is arranged on the first slider; a second slider, which is slidably arranged on the second slide rail, and the sliding direction of the second slider is parallel to the sliding direction of the first slider, and the battery cell ironing needle is arranged on the second slider; a pressure sensor, which is fixedly arranged on the first slider, and a pressure block is arranged on one end of the pressure sensor close to the second slider; wherein, the driving device drives the first slider to slide close to the second slider, so that the pressure block abuts against the second slider and drives the second slider to slide, thereby driving the battery cell ironing needle forward, and the pressure sensor is used to detect the pressure between the first slider and the second slider and thereby obtain the pressure information of the battery cell ironing needle.

[0013] According to an embodiment provided by the present invention, the pressure detection device further includes: a support seat, which is arranged on the bottom plate, and a slide groove is provided on the support seat for slidingly accommodating at least part of the battery cell ironing needle.

[0014] According to one embodiment provided by the present invention, the ironing mechanism also includes a rotating device, which includes: a mounting seat, which is arranged on the second slider; a second driving assembly, which is arranged on the mounting seat; a rotating shaft, which is rotatably arranged on the mounting seat and connected to the second driving assembly, and one end of the rotating shaft is fixed to the battery cell ironing needle.

[0015] The beneficial effects of the present invention are as follows: Different from the prior art, the present invention configures the battery cell ironing needle into a hollow tubular shape and provides an air inlet, an inner cavity, and an air outlet that are sequentially connected, so that the hot air component can sequentially pass through the air inlet, the inner cavity, and the air outlet to output hot air from the side wall of the battery cell ironing needle and heat the inner wall of the battery cell. Because the battery cell ironing needle does not come into contact with the battery cell and heats the inner wall of the battery cell with hot air having good fluidity, on the one hand, it ensures that the inner wall of the battery cell is heated evenly and gently, with a good heating effect, and is not likely to generate direct force on the inner wall of the battery cell, causing damage to the battery cell. On the other hand, it solves the problem of the battery cell ironing needle bending due to direct contact with the battery cell, thereby improving the service life of the battery cell ironing needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0017] Figure 1 This is a structural diagram of an embodiment of a battery hot needle provided by the present invention;

[0018] Figure 2 It is a structural schematic diagram of an embodiment of the perforation mechanism provided by the present invention;

[0019] Figure 3 It is a structural schematic diagram of another embodiment of the perforation mechanism provided by the present invention;

[0020] Figure 4 It is a structural schematic diagram of another embodiment of the perforation mechanism provided by the present invention. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] It should be noted that if a directional indication is involved in an embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] See also Figure 1The present invention provides a battery hot pin 10, which is in the shape of a hollow tube and includes an air inlet, an inner cavity, and an air outlet that are sequentially connected. Specifically, the battery hot pin 10 is hollow to form an inner cavity.

[0025] like Figure 1 As shown, the battery cell hot needle 10 includes a main tube 100 and a needle tip 200 located at one end of the main tube 100. Specifically, the main tube 100 and the needle tip 200 can be an integrally formed structure, and the diameter of the needle tip 200 gradually decreases in the direction away from the main tube 100, so that the needle tip 200 has a pointed end.

[0026] In a specific embodiment, the air inlet of the battery cell ironing needle 10 is arranged at the end of the main tube 100 away from the needle tip 200, and the air outlet is arranged on the side wall of the main tube 100.

[0027] In other embodiments, the air inlet is provided at other positions of the main tube 100, such as on the side wall of the main tube 100, and the air outlet can also be provided on the side wall of the needle tip 200, which is not limited here.

[0028] Specifically, a plurality of air outlets may be provided and arranged around the main tube 100 .

[0029] See also Figure 2-Figure 4 The present invention further provides a punching mechanism 20, which includes the battery cell punching pin 10 described in any of the above embodiments. The punching mechanism 20 also includes a hot air assembly 300, which is in communication with the battery cell punching pin 10, specifically by communicating with the air inlet of the battery cell punching pin 10 and then with the inner cavity of the battery cell punching pin 10, to provide hot air to the battery cell punching pin 10.

[0030] In a specific scenario, the punching mechanism 20 is used to punch holes in the battery cell. When punching holes, the battery cell punching needle 10 is used to insert into the hollow cavity of the battery cell. Then the hot air component 300 provides hot air to the battery cell punching needle 10, so that the hot air enters the inner cavity from the air inlet and then comes out from the air outlet to heat the inner wall of the hollow cavity of the battery cell.

[0031] Specifically, the diameter of the hot needle 10 is smaller than the diameter of the hollow cavity of the battery cell, so that when the hot needle 10 is inserted into the hollow cavity of the battery cell, it does not directly contact the inner wall of the battery cell. The hot air directly blows the diaphragm in the hollow cavity of the battery cell against the inner wall, making the inner wall more rounded.

[0032] In the above embodiment, by configuring the battery cell ironing needle 10 as a hollow tube and providing an air inlet, an inner cavity, and an air outlet that are sequentially connected, the hot air assembly 300 can sequentially output hot air from the side wall of the battery cell ironing needle 10 through the air inlet, the inner cavity, and the air outlet, thereby heating the inner wall of the battery cell. Because the battery cell ironing needle 10 does not come into contact with the battery cell and heats the inner wall of the battery cell with hot air having good fluidity, on the one hand, it ensures that the inner wall of the battery cell is heated evenly and gently, with good heating effect, and is less likely to generate direct force on the inner wall of the battery cell and cause damage to the battery cell. On the other hand, it solves the problem of the battery cell ironing needle 10 bending due to direct contact with the battery cell, thereby extending the service life of the battery cell ironing needle 10.

[0033] like Figure 2 As shown, in a specific embodiment, the hot air assembly 300 includes an air supply 310 and a heater 320. The air supply 310 and the heater 320 can be connected via a first pipe 330. The air supply 310 can specifically be an air source or a compressor, etc., for supplying air to the heater 320 via the first pipe 330. The heater 320 includes a heating chamber and heating elements such as heating tubes or heating wires disposed therein. The air supplied by the air supply 310 passes through the heating chamber and is heated by the heating tubes or heating wires to form hot air, which is then output. Specifically, the heater 320 can be connected to the battery cell ironing needle 10 via a second pipe 340, thereby supplying hot air to the battery cell ironing needle 10 via the second pipe 340.

[0034] In other embodiments, the hot air component 300 may also be an integrated heating component that can directly provide hot air, which is not limited here.

[0035] like Figure 3 As shown, the ironing mechanism 20 further includes a driving device 400, which is connected to the battery cell ironing needle 10 to drive the battery cell ironing needle 10 forward or backward, so that the battery cell ironing needle 10 is close to or away from the battery cell.

[0036] In a specific embodiment, the battery cell is fixed in one position, and the driving device 400 drives the battery cell hot needle 10 to approach the battery cell and insert it into the hollow cavity of the battery cell. After completing the heating of the inner wall of the battery cell, the driving device 400 further drives the battery cell hot needle 10 away from the battery cell.

[0037] like Figure 3 and Figure 4 As shown, the driving device 400 includes a mounting plate 410, a first driving assembly 420 and a driving block 450. The first driving assembly 420 is disposed on the mounting plate 410, and the driving block 450 is connected to the first driving assembly 420 for mounting the battery ironing needle 10.

[0038] Specifically, the drive device 400 also includes a lead screw 430 and a lead screw nut 440. The driving end of the first drive component 420 is provided with a first driving wheel 421. Specifically, the first drive component 420 can be a driving motor. One end of the lead screw 430 is provided on the mounting plate 410 through a lead screw support 431, and the lead screw 430 is rotatably provided on the lead screw support 431. The other end of the lead screw 430 is provided with a first driven wheel 432. The first driving wheel 421 and the first driven wheel 432 can be connected by a first transmission belt 460. The lead screw nut 440 is movably provided on the lead screw 430, and the drive block 450 is provided on the lead screw nut 440, and the drive block 450 can be used to install the battery core ironing needle 10.

[0039] Specifically, the driving block 450 can install the battery cell hot needle 10 by driving the connecting block 451 .

[0040] In a specific scenario, the first drive assembly 420 drives the first driving wheel 421 to rotate, thereby driving the first driven wheel 432 to rotate, and then driving the lead screw 430 to rotate relative to the lead screw nut 440, so that the lead screw nut 440 moves linearly on the lead screw 430, and drives the battery cell ironing needle 10 to move linearly through the drive block 450. Specifically, the rotation direction and speed of the first driving wheel 421 can be controlled to control the movement direction and speed of the battery cell ironing needle 10.

[0041] In one embodiment, the first driving wheel 421 and the first driven wheel 432 may be pulleys, and the first transmission belt 460 may be a conveyor belt. In another embodiment, the first driving wheel 421 and the first driven wheel 432 may be gears, and the first transmission belt 460 may be a chain.

[0042] like Figure 4 As shown, the ironing mechanism 20 also includes a pressure detection device 500, which is used to detect the pressure information of the battery cell ironing needle 10. In a specific embodiment, the driving device 400 can be controlled to stop driving the battery cell ironing needle 10 to approach the battery cell according to the pressure information. In other embodiments, the ironing mechanism 20 can also include an alarm connected to the pressure detection device 500, which can sound an alarm according to the pressure information.

[0043] Specifically, the pressure detection device 500 is used to detect the pressure information between the battery cell ironing needle 10 and the battery cell, and can determine whether the battery cell ironing needle 10 is stuck with the battery cell based on the pressure information, thereby controlling the driving device 400 to stop driving the battery cell ironing needle 10 close to the battery cell.

[0044] like Figure 4 As shown, the pressure detection device 500 includes a base plate 510 , a first slide rail 520 , a first slider 530 , a second slide rail 540 , a second slider 550 and a pressure sensor 560 .

[0045] The base plate 510 and the mounting plate 410 can be connected to each other or independent of each other. The first slide rail 520 is provided on the base plate 510, and the first slider 530 is slidably provided on the first slide rail 520 and connected to the drive block 450 of the drive device 400. The second slide rail 540 is provided on the first slider 530, and the second slider 550 is slidably provided on the second slide rail 540, and the sliding direction of the second slider 550 is parallel to the sliding direction of the first slider 530. The second slider 550 is provided with a battery cell hot needle 10. Specifically, the first slide rail 520 and the second slide rail 540 are provided in parallel, and the sliding directions of the first slider 530 and the second slider 550 are parallel, and both are parallel to the moving direction of the drive block 450. The pressure sensor 560 is provided on the first slider 530, and can be fixed to the first slider 530 via a pressure sensor base 562. The pressure sensor 560 is provided with a pressure block 561 at the end near the second slider 550.

[0046] In a specific embodiment, the driving device 400 drives the first slider 530 to slide close to the second slider 550, so that the pressure block 561 abuts against the second slider 550 and drives the second slider 550 to slide, thereby driving the battery cell ironing needle 10 forward to approach the battery cell. The pressure sensor 560 is used to detect the pressure between the first slider 530 and the second slider 550 and thus obtain the pressure information of the battery cell ironing needle 10.

[0047] Specifically, when the first slider 530 abuts against the second slider 550 through the pressure block 561 and drives the battery cell ironing needle 10 to approach the battery cell, if it is not stuck with the battery cell, the first slider 530 and the second slider 550 will continue to move synchronously. The pressure information between the first slider 530 and the second slider 550 is a preset value. If the battery cell ironing needle 10 is stuck with the battery cell, the battery cell will give the battery cell ironing needle 10 a reverse thrust, and the thrust acts on the pressure block 561 through the second slider 550, causing the pressure detected by the pressure sensor 560 to increase, that is, the pressure information is greater than a certain value, which indicates that the battery cell ironing needle 10 is stuck in the battery cell.

[0048] like Figure 4As shown, the pressure detection device 500 also includes a support base 570. The support base 570 is arranged on the base plate 51. The support base 570 is provided with a slide groove for slidingly accommodating at least part of the battery cell ironing needle 10. On the one hand, it guides the battery cell ironing needle 10, and on the other hand, it supports the battery cell ironing needle 10 to prevent the battery cell ironing needle 10 from being out of center with the battery cell. Specifically, since the battery cell ironing needle 10 itself has a slender cantilever structure, the battery cell ironing needle 10 may tilt due to gravity due to the excessive length of the cantilever, and the needle tip 200 of the battery cell ironing needle 10 may not be able to remain concentric with the battery cell. Therefore, by partially accommodating the battery cell ironing needle 10 in the slide groove of the support base 570, the battery cell ironing needle 10 is not easily tilted, so that the battery cell ironing needle 10 can remain concentric with the battery cell and is not easily stuck with the battery cell.

[0049] In a specific embodiment, the pressure detection device 500 further includes a limit plate 580, which is positioned at one end of the second slide rail 540 near the battery cell ironing needle 10 to prevent the second slider 550 from sliding off the second slide rail 540. Since the first slider 530 can abut against the second slider 550 and move toward the battery cell ironing needle 10, the limit plate 580 is provided to prevent the second slider 550 from sliding off the second slide rail 540.

[0050] like Figure 3 As shown, the ironing mechanism 20 further includes a rotating device 600, which is connected to the battery cell ironing needle 10 to drive the battery cell ironing needle 10 to rotate about the central axis.

[0051] like Figure 3 and Figure 4 As shown, the rotating device 600 includes a mounting base 610, a second drive assembly 620, and a rotating shaft 630. The mounting base 610 is disposed on the second slider 550, the second drive assembly 620 is disposed on the mounting base 610, and the rotating shaft 630 is rotatably disposed on the mounting base 610 and connected to the second drive assembly 620. One end of the rotating shaft 630 is fixed to the battery cell ironing needle 10.

[0052] Specifically, the driving end of the second driving assembly 620 is provided with a second driving wheel 621, which can also be a rotary motor. The other end of the rotating shaft 630 is provided with a second driven wheel 631, which is connected to the second driving wheel 621 via a second transmission belt 640.

[0053] Among them, the rotating shaft 630 can be specifically a hollow rotating shaft, including a rotating inner cavity to communicate with the inner cavity of the battery cell hot needle 10 through the air inlet, and the end of the rotating shaft 630 away from the battery cell hot needle 10 is movably connected to the second pipe 340 of the hot air component 300, so that when the rotating shaft 630 rotates, the second pipe 340 does not rotate.

[0054] In one embodiment, the second driving wheel 621 and the second driven wheel 631 may be pulleys, and the second transmission belt 640 may be a conveyor belt. In another embodiment, the second driving wheel 621 and the second driven wheel 631 may be gears, and the second transmission belt 640 may be a chain.

[0055] By setting up a rotating device 600, the battery cell ironing needle 10 can be driven to rotate. When heating the inner wall of the battery cell, the battery cell ironing needle 10 is driven to rotate in the hollow cavity of the battery cell, so that the air outlet rotates accordingly, thereby ensuring that the inner wall of the battery cell can be heated evenly to achieve a better heating effect.

[0056] In summary, the present invention provides a battery cell ironing needle and an ironing mechanism using the same. By setting the battery cell ironing needle to a hollow tube shape and providing an air inlet, an inner cavity, and an air outlet that are connected in sequence, the hot air component can output hot air from the side wall of the battery cell ironing needle through the air inlet, the inner cavity, and the air outlet in sequence, and heat the inner wall of the battery cell. Since the battery cell ironing needle does not come into contact with the battery cell, and heats the inner wall of the battery cell with hot air with good fluidity, on the one hand, it ensures that the inner wall of the battery cell is heated evenly and gently, with a good heating effect, and is not likely to generate a direct force on the inner wall of the battery cell to cause damage to the battery cell. On the other hand, it solves the problem of the battery cell ironing needle bending due to direct contact with the battery cell, thereby improving the service life of the battery cell ironing needle. Furthermore, by providing a pressure detection device, the pressure of the battery cell ironing needle is detected to determine whether the battery cell ironing needle is stuck.

[0057] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hot hole mechanism, characterized in that: The perforation mechanism comprises: The battery core ironing needle is in the shape of a hollow tube and includes an air inlet, an inner cavity and an air outlet that are connected in sequence; The battery core hot needle includes a main body tube and a needle tip located at one end of the main body tube; The air inlet is provided at the end of the main tube away from the needle tip, and the air outlet is provided on the side wall of the main tube; The battery core hot needle is used to be inserted into the hollow cavity of the battery core, and the diameter of the battery core hot needle is smaller than the diameter of the hollow cavity of the battery core; The ironing mechanism further includes a hot air component, which is connected to the air inlet of the battery core ironing needle to provide hot air to the battery core ironing needle; The ironing mechanism also includes a rotating device, which is connected to the battery ironing needle; When the battery core hot needle is inserted into the hollow cavity of the battery core, it does not directly contact the inner wall of the battery core.

2. The perforation mechanism according to claim 1, characterized in that: The ironing mechanism further includes a driving device, which is connected to the battery core ironing needle to drive the battery core ironing needle forward or backward.

3. The perforation mechanism according to claim 2, characterized in that: The driving device comprises: Mounting plate; A first driving assembly is provided on the mounting plate; A driving block is connected to the first driving assembly and is used to install the battery core ironing needle.

4. The perforation mechanism according to claim 2, characterized in that: The ironing mechanism further includes a pressure detection device, which is used to detect the pressure information of the battery core ironing needle.

5. The perforation mechanism according to claim 4, characterized in that: The pressure detection device comprises: base plate; A first slide rail is provided on the bottom plate; a first sliding block, slidably disposed on the first sliding rail and connected to a driving block of the driving device; a second slide rail, disposed on the first slide block; a second slider, slidably disposed on the second slide rail, wherein the sliding direction of the second slider is parallel to the sliding direction of the first slider, and the battery core ironing pin is disposed on the second slider; A pressure sensor is fixedly mounted on the first slider, wherein a pressure block is provided at one end of the pressure sensor close to the second slider; Among them, the driving device drives the first slider to slide close to the second slider, so that the pressure block abuts against the second slider and drives the second slider to slide, thereby driving the battery cell ironing needle forward, and the pressure sensor is used to detect the pressure between the first slider and the second slider and thus obtain the pressure information of the battery cell ironing needle.

6. The perforation mechanism according to claim 5, characterized in that: The pressure detection device further comprises: The support base is arranged on the bottom plate, and a slide groove is provided on the support base for slidingly accommodating at least part of the battery core ironing pins.

7. The perforation mechanism according to claim 5, characterized in that: The rotating device comprises: a mounting seat, the mounting seat being arranged on the second sliding block; A second driving assembly is disposed on the mounting seat; A rotating shaft is rotatably disposed on the mounting seat and connected to the second driving assembly, and one end of the rotating shaft is fixed to the battery core ironing pin.

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