Battery formation clamp opening device and clamping method

Abstract

The invention discloses a battery formation clamp opening device and a clamping method, the battery formation clamp opening device comprises an opening module and a driving module, the driving module comprises a first positioning pin, a second positioning pin, a first opening pin seat and a second opening pin seat, and the first opening pin seat and the second opening pin seat are oppositely arranged in a spaced mode in the first direction; at least one end of the first positioning needle is connected to the first clamp opening needle seat, at least one end of the second positioning needle is connected to the second clamp opening needle seat, the axial directions of the first positioning needle and the second positioning needle are respectively arranged along a second direction, the first positioning needle and the second positioning needle are oppositely arranged in parallel along the first direction, and the first direction is perpendicular to the second direction; the driving module is used for driving the first clamp opening needle seat and the second clamp opening needle seat to get close to each other and get away from each other. A traditional nesting mode is replaced by a mode that the first positioning pin and the second positioning pin are inserted into the curled part to open the clamp, and the phenomenon that the clamp is released in the clamp opening process is effectively avoided.

Description

Technical Field

[0001] The invention relates to the field of battery formation test clamping, and in particular to a battery formation fixture opening and clamping method. Background Art

[0002] In the process of developing new products and technologies for soft-pack batteries, battery formation usually requires the use of a simple pressurized clamp to apply pressure to the battery. In the prior art, the battery cell is usually placed between two plywood plates, and then the two plywood plates are clamped by a clamp to apply pressure to the battery cell. Since the opening and closing force of the clamp is too large, it cannot be opened manually, so a set of professional clamping equipment is required to open the clamp. The prior art with patent number CN211062800U discloses a battery formation clamp opener, and the convex portion provided on the clamping sheet of the clamping module is embedded in the groove of the clamping module. In the above technical scheme, the convex portion of the clamping sheet and the groove of the clamping mold are only partially nested. During the clamping process, the convex portion of the clamping sheet will be separated from the groove of the clamping module due to the great closing force, and the clamp will fall out of the mouth and fly away to injure people, and there is no safety guarantee. Summary of the invention The purpose of the present invention is to provide a battery formation clamp opening device, which uses a more optimal structure to replace the groove nesting method to avoid the clamp disengagement during the opening process, so as to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0003] The technical solutions adopted to solve the above technical problems are: The present invention provides a battery formation clamp opening device, which is suitable for a clamp having curling parts on both sides. The battery formation clamp opening device comprises: A clamping module, comprising a first positioning needle, a second positioning needle, a first clamping needle seat, and a second clamping needle seat, wherein the first clamping needle seat and the second clamping needle seat are arranged opposite to each other at intervals along the first direction, at least one end of the first positioning needle is connected to the first clamping needle seat, and at least one end of the second positioning needle is connected to the second clamping needle seat, the axial directions of the first positioning needle and the second positioning needle are respectively arranged along the second direction, the first positioning needle and the second positioning needle are arranged relatively parallel to each other along the first direction, and the first direction is perpendicular to the second direction; The driving module is used to drive the first opening clamp needle seat and the second opening clamp needle seat to move closer to and away from each other in a first direction.

[0004] The battery formation fixture opening device of the present invention has the following beneficial effects: When in use, the clip is arranged between the first opening clamp needle seat and the second opening clamp needle seat, the first positioning pin is inserted into the curled portion on one side of the clip and connected to the first opening clamp needle seat to achieve positioning and fixation between the first opening clamp needle seat and the clip, the second positioning pin is inserted into the curled portion on the other side of the clip and connected to the second opening clamp needle seat to achieve positioning and fixation between the second opening clamp needle seat and the clip, and then the driving module drives the first opening clamp needle seat and the second opening clamp needle seat to move away from each other in the first direction to achieve opening of the clip, and then the clamp with the battery cell is placed in the middle of the clip, the driving module drives the first opening clamp needle seat and the second opening clamp needle seat to approach each other, the clip rebounds and closes, and finally the first positioning pin and the second positioning pin are pulled out and separated from the curled portion to complete the clamping of the battery formation fixture. The present invention uses the first positioning pin and the second positioning pin to open the clamp by inserting and engaging with the curled portion instead of the traditional nesting method, which effectively avoids the clip from being disengaged during the opening process.

[0005] As a further improvement of the above technical solution, the first clamping needle seat is provided with two first connecting blocks spaced opposite to each other along the second direction, and the two ends of the first positioning needle are respectively plugged into the two first connecting blocks along the axial direction; The second clamping needle seat is provided with two second connecting blocks spaced apart and opposite to each other along the second direction, and two ends of the second positioning needle are respectively plugged into the two second connecting blocks along the axial direction.

[0006] As a further improvement of the above technical solution, it also includes a flexible pad block, which is arranged at intervals with the clamping module along a third direction, and the third direction, the first direction and the second direction are perpendicular to each other, and the flexible pad block is provided with a side between the first positioning pin and the second positioning pin.

[0007] As a further improvement of the above technical solution, the first clamping needle seat and the second clamping needle seat are respectively adjustable relative to the flexible cushion block along the third direction.

[0008] As a further improvement of the above technical solution, it also includes a frame, the second clamping needle seat is installed on the frame, the driving module includes a driving unit, and the first clamping needle seat is drivingly connected to the driving unit.

[0009] As a further improvement of the above technical solution, the driving module also includes a connecting plate, which is slidably installed on the frame, the first clamping needle seat is installed on the connecting plate, the driving unit is fixed to the frame, and the telescopic driving end of the driving unit is connected to the connecting plate.

[0010] As a further improvement of the above technical solution, the driving unit is a pressure-type driving element driven by the supply and exhaust of fluid, the pressure-type driving element has a driving chamber, the driving module is provided with a fluid supply and exhaust system, the fluid supply and exhaust system includes a pressure fluid supply and exhaust device, a one-way valve and a throttle valve, the one-way valve and the throttle valve are connected in parallel with each other, the one-way valve and the throttle valve are connected between the driving chamber and the pressure fluid supply and exhaust device, and the flow direction of the one-way valve is from the pressure fluid supply and exhaust device to the driving chamber.

[0011] As a further improvement of the above technical solution, the pressure-type driving element also has a reset chamber, a piston body is provided between the reset chamber and the driving chamber, the fluid supply and exhaust system also includes a control valve group, the pressure fluid supply and exhaust device is respectively connected to the reset chamber, the one-way valve and the throttle valve through the control valve group, and the control valve group is configured to control the on-off between the reset chamber and the pressure fluid supply and exhaust device, and to control the on-off between the pressure fluid supply and exhaust device and the one-way valve and the throttle valve respectively.

[0012] As a further improvement of the above technical solution, the control valve group is a three-position five-way valve, and the control valve group is provided with a first interface, a second interface, a third interface, a first discharge port and a second discharge port, the first interface is connected to the reset chamber, the second interface is respectively connected to the one-way valve and the throttle valve, and the third interface is connected to the supply end of the pressure fluid supply and exhaust device.

[0013] The present invention also provides a clamping method, which is applicable to the battery formation fixture opening device, and the battery formation fixture opening method comprises: Placing the clamp between the first clamp opening needle seat and the second clamp opening needle seat according to a set posture; Insert the first positioning pin into the curled portion on one side of the clip and connect it to the first clamp opening pin seat; Insert the second positioning pin into the curled portion on the other side of the clip and connect it to the second clamp opening pin seat; The first clamp opening needle seat and the second clamp opening needle seat are moved away from each other to open the clamp; Place the clip with the battery cell in the middle of the clip; The first clamp opening needle seat and the second clamp opening needle seat are brought closer to each other, and the clamp rebounds and closes; The first positioning needle and the second positioning needle are pulled out and separated from the curling portion.

[0014] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments; Figure 1 It is a schematic diagram of the clamping of the battery formation; Figure 2 It is a schematic diagram of the structure of the clamp; Figure 3 It is a structural schematic diagram of an embodiment of the battery formation clamp opening device provided by the present invention; Figure 4 It is a side view of an embodiment of the battery formation fixture opening device provided by the present invention; Figure 5 This is a front view of an embodiment of the battery formation fixture opening device provided by the present invention; Figure 6 This is a schematic diagram of a fluid supply and exhaust system provided by the present invention, in which a control valve group of one embodiment is in a middle sealing position; Figure 7 This is a schematic diagram of a fluid supply and exhaust system provided by the present invention, in which a control valve group of one embodiment is in a first working position; Figure 8 It is a schematic diagram of a fluid supply and exhaust system provided by the present invention, in which a control valve group of one embodiment is in a second working position; Fig. 9 is a flow chart of the steps of the clamping method provided by the present invention; Figure Number: Clip 100; Curled portion 110; The clamping module 200; the first positioning needle 210; the second positioning needle 220; the first clamping needle seat 230; the first connecting block 231; the second clamping needle seat 240; the second connecting block 241; Driving module 300; driving unit 310; connecting plate 320; Flexible pad 400; Rack 700; bottom plate 710; vertical plate 720; guide rail 521; slider 522; Pressure-type driving element 500; cylinder body 510; piston body 520; piston rod 530; driving chamber 540; reset chamber 550; Fluid supply and exhaust system 600 ; one-way valve 610 ; throttle valve 620 ; control valve group 630 ; first interface 631 ; second interface 632 ; third interface 633 ; first discharge port 634 ; second discharge port 635 . DETAILED DESCRIPTION

[0016] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0017] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0018] In the description of the present invention, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

[0019] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0020] In the process of developing new products and technologies of soft-pack batteries, the battery formation usually requires the use of a simple pressurizing fixture to apply pressure to the battery. In the prior art, the battery cell is usually placed between two clamps, and then the two clamps are clamped by a clamp 100 to apply pressure to the battery cell. Figure 1 As shown, since the opening and closing force of the clip 100 is too large, it cannot be opened manually, and thus a set of professional clip opening equipment is required to open the clip 100.

[0021] Referring to the invention patent CN211062800, a battery formation clamp opener is a horizontal structure, and the convex portion provided on the clamping piece of the clamping module is embedded in the groove of the clamping module, such as Figure 2 As shown, curling portions 110 are provided on both sides of the clip 100, and the curling portions 110 are formed by bending. The prior art uses a groove nesting method to fix the curling portion 110 of the clip 100 and the clamping device, which is very easy to disengage. The large rebound force can cause the clip 100 to splash and injure the operator. Therefore, the present invention proposes a battery formation clamping device, which uses a better structure to replace the groove nesting method to avoid the clip 100 from disengaging during the clamping process, so as to facilitate the clamping of the battery formation.

[0022] like Figures 3 to 5 As shown, the battery formation clamp opening device of the present invention is suitable for a clamp 100 having a curling portion 110 on both sides. Figure 2 shown.

[0023] The battery formation clamp opening device of the embodiment of the present invention comprises: an opening module 200 and a driving module 300, wherein the opening module 200 comprises a first positioning pin 210, a second positioning pin 220, a first opening needle holder 230 and a second opening needle holder 240, and the first opening needle holder 230 and the second opening needle holder 240 of the embodiment of the present invention are arranged relative to each other at intervals along a first direction. This embodiment defines the first direction as an up and down vertical direction. In some other embodiments, the first direction can be set to a left-right lateral direction or a front-back lateral direction, etc.

[0024] The axial directions of the first positioning pin 210 and the second positioning pin 220 are respectively arranged along the second direction, wherein the first direction is perpendicular to the second direction. In this embodiment, the second direction is defined as the left-right lateral direction.

[0025] At least one end of the first positioning needle 210 of the embodiment of the present invention is detachably connected to the first open clamp needle seat 230, and at least one end of the second positioning needle 220 is detachably connected to the second open clamp needle seat 240, and the first positioning needle 210 and the second positioning needle 220 are arranged relatively parallel to each other along the first direction. It can be understood that the first positioning needle 210 and the second positioning needle 220 are arranged relatively parallel to each other up and down, and the first positioning needle 210 and the second positioning needle 220 are respectively detachably installed on the first open clamp needle seat 230 and the second open clamp needle seat 240, and at least one end of the first positioning needle 210 and the second positioning needle 220 is set as a detachable fixed end, so that a part of the first positioning needle 210 and the second positioning needle 220 are respectively suspended on the outside of the first open clamp needle seat 230 and the second open clamp needle seat 240.

[0026] The outer diameters of the first positioning pin 210 and the second positioning pin 220 of the embodiment of the present invention match the inner diameter of the curling portion 110 on the clip 100 , so that the first positioning pin 210 and the second positioning pin 220 can pass through the curling portion 110 separately and be inserted and fixed in the curling portion 110 .

[0027] In some embodiments, the first positioning pin 210 and the second positioning pin 220 can be directly fixed on the first clamping pin seat 230 and the second clamping pin seat 240 respectively, and when plugged with the curling part 110, the clamp 100 is driven to be plugged with the curling part 110 and the corresponding positioning pin.

[0028] The driving module 300 is used to drive the first opening clamp needle seat 230 and the second opening clamp needle seat 240 to move closer to and away from each other in the first direction.

[0029] When in use, the clip 100 is placed between the first opening clip needle seat 230 and the second opening clip needle seat 240, the first positioning needle 210 is inserted into the curling portion 110 on one side of the clip 100, and connected to the first opening clip needle seat 230, so as to achieve the positioning and fixation between the first opening clip needle seat 230 and the clip 100, the second positioning needle 220 is inserted into the curling portion 110 on the other side of the clip 100, and connected to the second opening clip needle seat 240, so as to achieve the positioning and fixation between the second opening clip needle seat 240 and the clip 100, and then the driving module 300 drives the first opening clip needle seat 230 and the second opening clip needle seat 240 move away from each other in a first direction to realize the opening of the clip 100, and then the clamping plate with the battery cell is placed in the middle of the clip 100, and the driving module 300 drives the first clamping needle seat 230 and the second clamping needle seat 240 to approach each other, and the clip 100 rebounds and closes, and finally the first positioning needle 210 and the second positioning needle 220 are pulled out and separated from the curling part 110, and the clamping of the battery formation fixture can be completed. The present invention uses the first positioning needle 210 and the second positioning needle 220 to insert and engage with the curling part 110 to open the clamp instead of the traditional nesting method, which effectively avoids the clip 100 from being disengaged during the opening process.

[0030] Further, such as Figure 3 As shown, the first clamp needle seat 230 of the present embodiment is provided with two first connecting blocks 231, and the two first connecting blocks 231 are arranged at a distance and relative to each other in the left-right direction at the bottom of the first clamp needle seat 230, and the left and right ends of the first positioning needle 210 are respectively axially plugged with the two first connecting blocks 231. It can be understood that the two first connecting blocks 231 are both provided with first axial holes extending along the left and right directions, and the first positioning needle 210 is inserted from the first axial holes, so that the left and right ends of the first positioning needle 210 are plugged and fixed in the two first axial holes. At this time, a suspended portion is formed between the two ends of the first positioning needle 210, and the suspended portion is used to be plugged with the curling portion 110.

[0031] The second clamp needle seat 240 is also provided with two second connecting blocks 241, and the two second connecting blocks 241 are arranged at the top of the second clamp needle seat 240 with an interval and relative to each other along the left-right direction. The left and right ends of the second positioning needle 220 are respectively axially plugged with the two second connecting blocks 241. It can be understood that the two second connecting blocks 241 are both provided with second axial holes extending along the left and right, and the second positioning needle 220 is inserted from the second axial hole, so that the left and right ends of the second positioning needle 220 are plugged and fixed in the two second axial holes.

[0032] The embodiment of the present invention fixes the left and right ends of the first positioning pin 210 through two first connecting blocks 231, and fixes the left and right ends of the second positioning pin 220 through two second connecting blocks 241, thereby improving the structural strength of the installation of the first positioning pin 210 and the second positioning pin 220, thereby increasing the force for opening the clamp, and avoiding the first positioning pin 210 and the second positioning pin 220 from bending and deforming during the opening process.

[0033] In some other embodiments, the first positioning pin 210 and the second positioning pin 220 may be fixedly installed by other detachable structures.

[0034] The current clamp opener only fixes the curled portions 110 on both sides of the clamp 100. During the clamp opening process, the clamp 100 may tilt to one side due to the different force modes on both sides. The present embodiment further provides a flexible pad 400. The flexible pad 400 and the clamp opening module 200 are spaced apart along a third direction. The third direction, the first direction and the second direction are perpendicular to each other. The present embodiment defines the third direction as the front-to-back horizontal direction. It can be understood that the clamp opening module 200 and the flexible pad 400 are spaced apart from each other in the front-to-back direction, and the flexible pad 400 is vertically arranged on the rear side between the first positioning pin 210 and the second positioning pin 220.

[0035] When in use, the flexible pad 400 resists the bottom of the clip 100 itself. It can be understood that the bottom of the clip 100 is flexibly positioned to prevent the bottom of the clip 100 from swinging during the opening process, which affects the opening effect.

[0036] The flexible pad 400 may be a solid material with certain elasticity, such as a sponge pad, a rubber pad, or a silicone pad.

[0037] The embodiment of the present invention is also provided with a frame 700, and defines that the second opening clamp needle seat 240 is fixed, while the first opening clamp needle seat 230 is movable, and the second opening clamp needle seat 240 is installed on the frame 700, and the driving module 300 of the embodiment of the present invention includes a driving unit 310, and the first opening clamp needle seat 230 is transmission-connected to the driving unit 310. It can be understood that the driving unit 310 drives the first opening clamp needle seat 230 to move in the up and down directions to achieve the distance and approach between the first opening clamp needle seat 230 and the second opening clamp needle seat 240.

[0038] Specifically, the frame 700 of this embodiment is provided with a base plate 710 and a vertical plate 720, the second clamp needle seat 240 is installed on the base plate 710, and the vertical plate 720 is vertically fixed to the rear side of the base plate 710, the driving unit 310 is fixedly installed on the upper side of the vertical plate 720 through a fixed pad, and the flexible pad 400 is fixed on the front side of the lower part of the vertical plate 720.

[0039] In order to improve the stability of the movement of the first clamp needle seat 230, the driving module 300 also includes a connecting plate 320, which is slidably installed on the vertical plate 720, and the first clamp needle seat 230 is installed on the connecting plate 320, and the telescopic driving end of the driving unit 310 is connected to the connecting plate 320. It can be understood that in this embodiment, a vertically arranged guide rail 721 is provided on the front side of the vertical plate 720, and the rear end of the connecting plate 320 is slidably matched with the guide rail 721 through a slider 722.

[0040] When in use, the entire clamping device is supported by the work surface, wherein the clamping device can be placed in a vertical position with the base plate 710 parallel to the work surface, or in a horizontal position with the vertical plate 720 parallel to the work surface. The base plate 710 is placed parallel to the work surface to save installation space, and the clamping plate is placed parallel to the work surface into the clamp 100 to avoid the battery cell sliding from the middle of the clamping plate when other picking and / or clamping methods occur. To suit the operator's working habits, the vertical plate 720 can also be placed parallel to the work surface.

[0041] The first clamping needle seat 230 and the second clamping needle seat 240 of this embodiment are placed vertically in the up and down direction, and the clamping is carried out in the up and down direction, which can prevent the battery cell from sliding and shifting from the middle of the clamping plate during the clamping process. The clamping direction of the clip 100 is designed to avoid the distance between the clip 100 and the bottom plate 710 being limited, resulting in the clip 100 being unable to be clamped at the center of the edge line of the clamping plate.

[0042] Furthermore, the first opening clamp needle seat 230 and the second opening clamp needle seat 240 are respectively adjustably arranged along the third direction relative to the flexible pad 400. It can be understood that the first opening clamp needle seat 230 is adjustably installed on the connecting plate 320 along the front-to-back direction, and the second opening clamp needle seat 240 is adjustably installed on the bottom plate 710 along the front-to-back direction to adjust the front-to-back position of the first positioning needle 210 and the second positioning needle 220 to adapt to the installation of clips 100 of different sizes.

[0043] like Figure 3 As shown, the mounting holes on the base plate 710 are adjustable waist holes, and the mounting holes on the connecting plate 320 are multiple groups of positioning holes. During installation, according to the different sizes of the clips 100, the first open clamp needle seat 230 and the second open clamp needle seat 240 are respectively installed on the corresponding mounting holes.

[0044] In some embodiments, the first clamping needle seat 230 is slidably installed on the connecting plate 320, and the second clamping needle seat 240 is slidably installed on the bottom plate 710. During the clamping process, the first clamping needle seat 230 and the second clamping needle seat 240 can move back and forth adaptively.

[0045] The driving unit 310 of the embodiment of the present invention is a pressure-type driving element 500 driven by the supply and discharge of fluid, such as Figure 6 As shown, the pressure-type driving element 500 includes a cylinder body 510, a piston body 520 slidably disposed in the cylinder body 510, and a piston rod 530 connected to the piston body 520. When in use, the piston rod 530 is connected to the connecting plate 320 to drive the connecting plate 320 to rise and fall, and a driving chamber 540 is formed between the piston body 520 and the inside of the cylinder body 510. The extension and retraction of the piston rod 530 is achieved by controlling the fluid in and out of the driving chamber 540.

[0046] After the clamp is opened, the existing pressure-type driving element 500 is pulled by the rebound force of the clamp 100 and completes the return stroke instantly. The clamp 100 rebounds quickly and the clamping action cannot be performed stably. When there is no object in the middle of the clamp 100, the rapid rebound is easy to disengage and fly away, splashing and injuring the operator.

[0047] like Figure 6 As shown, the driving module 300 of the embodiment of the present invention is also provided with a fluid supply and exhaust system 600, and the fluid supply and exhaust system 600 includes a pressure fluid supply and exhaust device (not shown in the figure), a one-way valve 610 and a throttle valve 620. The one-way valve 610 is connected between the driving chamber 540 and the pressure fluid supply and exhaust device. The flow direction of the one-way valve 610 is from the pressure fluid supply and exhaust device to the driving chamber 540, and the throttle valve 620 is connected in parallel to both ends of the one-way valve 610.

[0048] The throttle valve 620 can be a two-way throttling or a one-way throttling. When used as a one-way throttling, the throttling flow direction of the throttle valve 620 is from the drive chamber 540 to the pressure fluid supply and exhaust device.

[0049] The pressure-type driving element 500 may be a pneumatic element driven by air or a hydraulic element driven by liquid. In this embodiment, a pneumatic element is used as an example, and the pressure fluid supply and exhaust device is set to supply high-pressure air.

[0050] When opening the clamp, the high-pressure air provided by the pressure fluid supply and exhaust device enters the drive chamber 540 through the one-way valve 610, and the high-pressure air pushes the piston body 520 to move, and drives the first clamping needle seat 230 away from the second clamping needle seat 240 through the piston rod 530 to achieve the clamping action. When closing the clamp, the air cannot pass through the one-way valve 610, and the air in the drive chamber 540 flows through the throttle valve 620 to slowly release the pressure, so that the clamp 100 slowly closes the clamping plate, so that the rebound process of the clamp 100 is smooth, the clamping action is stable, and rapid rebound is prevented.

[0051] Furthermore, the pressure-type driving element 500 of the embodiment of the present invention also has a reset chamber 550, the piston body 520 divides the cylinder body 510 into the reset chamber 550 and the driving chamber 540, and the fluid supply and exhaust system 600 also includes a control valve group 630. The pressure fluid supply and exhaust equipment is respectively connected to the reset chamber 550, the one-way valve 610 and the throttle valve 620 through the control valve group 630. The control valve group 630 is configured to control the connection and disconnection between the reset chamber 550 and the pressure fluid supply and exhaust equipment, and to control the connection and disconnection between the pressure fluid supply and exhaust equipment and the one-way valve 610 and the throttle valve 620.

[0052] In the opening stage, the control valve group 630 controls the pressure fluid supply and discharge device to be connected with the one-way valve 610, so that the high-pressure air enters the driving chamber 540 through the one-way valve 610; in the holding stage, that is, when the clamping plate with the battery cell is clamped to the clamp 100, the control valve group 630 controls the pressure fluid supply and discharge device to be disconnected from the one-way valve 610, the throttle valve 620, and the reset chamber 550, so that no gas enters or exits the pressure-type driving element 500, the piston body 520 is kept in a fixed state, and the piston body 520 will not shift, ensuring that the clamp 100 remains in an open state; in the closing stage, the control valve group 6 30 controls the throttle valve 620 to be connected with the outside, and the pressure fluid supply and exhaust device is connected with the reset chamber 550, and the gas enters the reset chamber 550 to reset the piston body 520. At the same time, the piston body 520 will also reset following the elastic force of the clamp 100. However, the reset chamber 550 is provided in this embodiment to ensure that the piston body 520 is accurately reset. When the pressure-type driving element 500 is used as a pneumatic element, the gas is discharged outward by slowly releasing pressure through the throttle valve 620. When the pressure-type driving element 500 is used as a hydraulic element, the fluid is slowly released by flowing through the throttle valve 620 and flows back to the pressure fluid supply and exhaust device.

[0053] like Figure 6 As shown, the control valve group 630 of this embodiment is a three-position five-way valve, and the control valve group 630 is provided with a first interface 631, a second interface 632, a third interface 633, a first exhaust port 634 and a second exhaust port 635. The first interface 631 is connected to the reset chamber 550, the second interface 632 is respectively connected to the one-way valve 610 and the throttle valve 620, and the third interface 633 is connected to the supply end of the pressure fluid supply and exhaust device. When the pressure-type drive element 500 is used as a hydraulic element, the first exhaust port 634 and the second exhaust port 635 are connected to the return end of the pressure fluid supply and exhaust device. When the pressure-type drive element 500 is used as a pneumatic element, the first exhaust port 634 and the second exhaust port 635 are directly connected to the outside.

[0054] like Figures 6 to 8As shown, the control valve group 630 has three state positions, namely the first working position, the middle sealing position and the second working position. When the control valve group 630 is switched to the first working position, the first discharge port 634 is connected to the first interface 631, and the second interface 632 is connected to the third interface 633; ​​when the control valve group 630 is switched to the middle sealing position, the first interface 631, the second interface 632, the third interface 633, the first discharge port 634 and the second discharge port 635 are all in a closed state; when the control valve group 630 is switched to the second working position, the first interface 631 is connected to the third interface 633, and the second interface 632 is connected to the second discharge port 635.

[0055] The control method of the driving module 300 according to the embodiment of the present invention is as follows: In the preparation stage, the control valve group 630 is kept in the middle sealing position, and no gas flows to the pressure-type driving element 500; In the working stage, the control valve group 630 is switched to the first working position, such as Figure 7 As shown, the gas flows through the one-way valve 610 to the driving chamber 540, and the high-pressure air pushes the piston body 520 to move, and drives the first clamping needle seat 230 away from the second clamping needle seat 240 through the piston rod 530 to achieve the clamping action; During the holding phase, the control valve group 630 is switched to the middle sealing position. Figure 6 As shown, there is no gas entering or exiting the pressure-type driving element 500, so the piston body 520 is kept in a fixed state, and the piston body 520 will not shift, ensuring that the clamp 100 remains in an open state; In the return stage, the control valve group 630 is switched to the second working position, such as Figure 8 As shown, the gas in the driving chamber 540 cannot pass through the one-way valve 610, and the gas in the driving chamber 540 flows through the throttle valve 620, slowly releasing the pressure, and the clamp 100 slowly closes to clamp the clamping plate.

[0056] The control valve group 630 of this embodiment adopts a three-position five-way valve. In other embodiments, other forms of solenoid valves can also be used to achieve the same effect.

[0057] like Fig. 9 As shown, the present invention also proposes a clamping method, which is applicable to the battery formation fixture opening device, and the battery formation fixture opening method comprises the following steps: Step S100: placing the clip 100 between the first opening clip needle seat 230 and the second opening clip needle seat 240 according to the set posture; Step S200: inserting the first positioning pin 210 into the curling portion 110 on one side of the clip 100 and connecting it to the first opening pin seat 230; Step S300: insert the second positioning pin 220 into the curling portion 110 on the other side of the clip 100 and connect it to the second opening pin seat 240; Step S400: moving the first opening clamp needle seat 230 and the second opening clamp needle seat 240 away from each other to open the clamp 100; Step S500: placing the clamping plate with the battery cell in the middle of the clamp 100; Step S600: The first opening clamp needle seat 230 and the second opening clamp needle seat 240 are brought close to each other, and the clamp 100 rebounds and closes; Step S700 : pulling out and separating the first positioning pin 210 and the second positioning pin 220 from the curling portion 110 .

[0058] In step S100 , the bottom of the clip 100 is brought into contact with the flexible pad 400 to keep the clip 100 in a preset state.

[0059] In step S400, the control valve group 630 is switched to the first working position, the gas flows through the one-way valve 610 to the drive chamber 540, the high-pressure air pushes the piston body 520 to move, and drives the first clamping needle seat 230 away from the second clamping needle seat 240 through the piston rod 530 to realize the clamping action.

[0060] In step S500, the control valve group 630 is switched to the middle sealing position, and no gas enters or exits the pressure-type driving element 500, so that the piston body 520 is kept in a fixed state and displacement of the piston body 520 does not occur, thereby ensuring that the clamp 100 remains in an open state.

[0061] In step S600, the control valve group 630 is switched to the second working position, the gas in the driving chamber 540 cannot pass through the one-way valve 610, the gas in the driving chamber 540 flows through the throttle valve 620, slowly releases pressure, and the clamp 100 slowly closes to clamp the clamping plate.

[0062] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A battery formation fixture opening device, characterized in that: Suitable for a clamp having curled portions on both sides, the battery formation clamp opening device comprises: A clamping module, comprising a first positioning needle, a second positioning needle, a first clamping needle seat, and a second clamping needle seat, wherein the first clamping needle seat and the second clamping needle seat are arranged opposite to each other at intervals along the first direction, at least one end of the first positioning needle is connected to the first clamping needle seat, and at least one end of the second positioning needle is connected to the second clamping needle seat, the axial directions of the first positioning needle and the second positioning needle are respectively arranged along the second direction, the first positioning needle and the second positioning needle are arranged relatively parallel to each other along the first direction, and the first direction is perpendicular to the second direction; The driving module is used to drive the first opening clamp needle seat and the second opening clamp needle seat to move closer to and away from each other in a first direction.

2. The battery formation fixture opening device according to claim 1, characterized in that: The first clamping needle seat is provided with two first connecting blocks spaced apart and opposite to each other along the second direction, and the two ends of the first positioning needle are respectively plugged into the two first connecting blocks along the axial direction; The second clamping needle seat is provided with two second connecting blocks spaced apart and opposite to each other along the second direction, and two ends of the second positioning needle are respectively plugged into the two second connecting blocks along the axial direction.

3. The battery formation fixture opening device according to claim 1, characterized in that: It also includes a flexible pad, which is arranged with the clamping module in a third direction, the third direction, the first direction and the second direction are perpendicular to each other, and the flexible pad is provided with a side between the first positioning pin and the second positioning pin.

4. The battery formation fixture opening device according to claim 3, characterized in that: The first opening and clamping needle seat and the second opening and clamping needle seat are respectively arranged with respect to the flexible cushion block in an adjustable manner along the third direction.

5. The battery formation fixture opening device according to claim 1, characterized in that: It also includes a frame, the second clamping needle seat is installed on the frame, the driving module includes a driving unit, and the first clamping needle seat is drivingly connected to the driving unit.

6. The battery formation fixture opening device according to claim 5, characterized in that: The driving module also includes a connecting plate, which is slidably mounted on the frame, the first clamping needle seat is mounted on the connecting plate, the driving unit is fixed to the frame, and the telescopic driving end of the driving unit is connected to the connecting plate.

7. The battery formation fixture opening device according to claim 1, characterized in that: The driving module includes a driving unit, which is a pressure-type driving element driven by the supply and exhaust of fluid. The pressure-type driving element has a driving chamber. The driving module is provided with a fluid supply and exhaust system, which includes a pressure fluid supply and exhaust device, a one-way valve and a throttle valve. The one-way valve and the throttle valve are connected in parallel with each other. The one-way valve and the throttle valve are connected between the driving chamber and the pressure fluid supply and exhaust device. The flow direction of the one-way valve is from the pressure fluid supply and exhaust device to the driving chamber.

8. The battery formation fixture opening device according to claim 7, characterized in that: The pressure-type driving element also has a reset chamber, and a piston body is provided between the reset chamber and the driving chamber. The fluid supply and exhaust system also includes a control valve group. The pressure fluid supply and exhaust device is respectively connected to the reset chamber, the one-way valve and the throttle valve through the control valve group. The control valve group is configured to control the connection and disconnection between the reset chamber and the pressure fluid supply and exhaust device, and control the connection and disconnection between the pressure fluid supply and exhaust device and the one-way valve and the throttle valve respectively.

9. The battery formation fixture opening device according to claim 8, characterized in that: The control valve group is a three-position five-way valve, and is provided with a first interface, a second interface, a third interface, a first discharge port, and a second discharge port. The first interface is connected to the reset chamber, the second interface is respectively connected to the one-way valve and the throttle valve, and the third interface is connected to the supply end of the pressure fluid supply and exhaust device.

10. A clamping method, characterized in that: The battery formation fixture opening device according to any one of claims 1 to 9, wherein the battery formation fixture opening method comprises: Placing the clamp between the first clamp opening needle seat and the second clamp opening needle seat according to a set posture; Insert the first positioning needle into the curled portion on one side of the clip and connect it to the first clamp opening needle seat; Insert the second positioning pin into the curled portion on the other side of the clip and connect it to the second clamp opening pin seat; The first clamp opening needle seat and the second clamp opening needle seat are moved away from each other to open the clamp; placing a clamping plate with a battery cell in the middle of the clamp; The first clamp opening needle seat and the second clamp opening needle seat are brought closer to each other, and the clamp rebounds and closes; The first positioning needle and the second positioning needle are pulled out and separated from the curling portion.

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