Automatic electrode plate supply device

Abstract

The present disclosure relates to an automatic supply device for electrode plates, the automatic supply device for electrode plates according to one embodiment of the present disclosure may include: a magazine member on which a plurality of electrode plates are placed on top of each other to form a stack; a lifting unit operably coupled with the cartridge member to support and move a stack of the plurality of electrode plates within the cartridge member; and a sensing member provided on the lifting unit, the sensing member sensing a bottommost electrode plate provided at the bottommost portion of a stack of the plurality of electrode plates.

Description

[0001] This application is a divisional application of an application with a filing date of September 26, 2021, application number 202111129631.X, and invention name “Automatic Electrode Plate Supplying Device”.

[0002] CROSS-REFERENCE TO RELATED APPLICATIONS

[0003] This application claims the benefit of Korean Patent Application No. 10-2020-0142303 filed on October 29, 2020, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0004] The present invention relates to an automatic electrode plate supply device. Background Art

[0005] As the technology development and demand for mobile devices and electric vehicles etc. increase, the demand for secondary battery cells as energy sources is also rapidly increasing. The conversion between chemical energy and electrical energy of secondary battery cells is reversible, so secondary battery cells allow repeated charging and discharging.

[0006] The secondary battery cell includes an electrode assembly such as an anode, a cathode, a separator, and an electrolyte as main components of the secondary battery, and a cell main body member of a multi-layered exterior material (laminated film case) that protects the electrode assembly.

[0007] Generally, electrode plates such as an anode and a cathode are provided to manufacture the secondary battery cell, and the electrode plates are supplied one by one by an electrode plate automatic supply device in a state where a plurality of electrode plates are stacked.

[0008] However, when all of the electrode plates are consumed in the electrode plate automatic supply device, the manufacturing of the secondary battery cell is interrupted, and therefore, a plurality of electrode plates need to be stacked again in the electrode plate automatic supply device.

[0009] To this end, the electrode plate automatic supply device may be provided with a sensing member for sensing the electrode plate. However, when such a sensing member is provided at the upper portion of the electrode plate automatic supply device to sense whether the electrode plate is exhausted, the sensing member needs to be moved to the upper surface of the electrode plate provided at the uppermost portion of the electrode plate to sense whether the electrode plate exists.

[0010] In the case of this structure, when the electrode plate set at the uppermost part is supplied to manufacture a secondary battery cell, the sensing member must be moved away from the electrode plate, and when sensing whether the electrode plate exists, the sensing member must be set on the electrode plate, so the sensing member must be constructed to move its position through a swinging operation.

[0011] However, when configured as described above, there is a problem that disconnection of electric wires and the like connected to the sensing member is likely to occur.

[0012] In addition, conventionally, a color sensor that senses a color difference between an electrode plate and a magazine member where the electrode plate is disposed is used as a sensing member, however, in this case, there may be a problem of erroneous sensing due to light reflection on the electrode plate.

[0013] Therefore, it is necessary to develop an improved automatic electrode plate supply device to improve and alleviate the above limitations of the existing devices.

[0014] Prior art literature

[0015] Patent Literature

[0016] (Patent Document 1) KR10-1806236B1 Summary of the invention

[0017] 1. Technical issues to be resolved

[0018] An object of the present disclosure is to provide an improved apparatus for automatically supplying electrode plates from an electrode plate stack loaded on an apparatus for manufacturing secondary batteries.

[0019] The advantage of the device disclosed herein is that it alleviates and overcomes the problem of disconnection of the wires from the sensing member of the device that may occur in existing devices.

[0020] Another advantage of the device disclosed herein is that it alleviates and overcomes another problem of the prior art devices in which the sensing member may mis-sense the electrode plate.

[0021] (II) Technical solution

[0022] According to one embodiment of the present disclosure, an automatic electrode plate supply device may include: a material box component, in which a plurality of electrode plates are placed on top of each other to form a stack; a lifting unit operably combined with the material box component to support and move the stack of the plurality of electrode plates within the material box component; and a sensing component disposed on the lifting unit, the sensing component sensing a bottommost electrode plate disposed at the bottom of the stack of the plurality of electrode plates.

[0023] Specifically, the lifting unit of the automatic electrode plate supply device according to one embodiment of the present disclosure may include: a supporting member, which is combined with the sensing member, and the supporting member is movable up and down in the material box member through a driving member; and the driving member, which is combined to the supporting member and causes the supporting member to move up and down in the material box member, wherein the bottommost electrode plate of the stack of multiple electrode plates is placed on the supporting member.

[0024] In which, a sensing hole may be formed in the supporting member of the electrode plate automatic supplying device according to one embodiment of the present disclosure, and the sensing member may sense the bottom surface of the bottommost electrode plate through the sensing hole.

[0025] In addition, the support member of the electrode plate automatic supply device according to one embodiment of the present disclosure may form a chamfered portion in a circular arc shape at the upper end portion of the sensing hole adjacent to the upper surface on which the bottommost electrode plate is placed.

[0026] In addition, in the supporting member of the electrode plate automatic supplying device according to one embodiment of the present disclosure, the width of the sensing hole may be at least less than 15 mm, and the radius of curvature of the chamfered portion may be at least greater than 0.5 mm.

[0027] In addition, the upper surface of the support member of the electrode plate automatic supply device according to one embodiment of the present disclosure, on which the bottommost electrode plate is placed, may be formed in an arc shape.

[0028] In addition, the electrode plate automatic supplying device according to one embodiment of the present disclosure may further include an anchor frame on the lower surface of the support member, and wherein the sensing member may be coupled to the anchor frame.

[0029] Among them, the anchor rod frame of the electrode plate automatic supply device according to an embodiment of the present disclosure can be arranged inside the surrounding area of ​​the lower surface of the supporting member.

[0030] In addition, the sensing member of the electrode plate automatic supplying device according to one embodiment of the present disclosure may be a direct reflection type optical sensor.

[0031] In addition, according to an embodiment of the present disclosure, the material box component of the electrode plate automatic supply device may include: a bottom plate portion, which is formed with a through hole to enable the lifting unit to move through the bottom plate portion; and a side wall portion, which is coupled to the bottom plate portion and is configured to cover at least a portion of the edge of each of the plurality of electrode plates.

[0032] According to one embodiment of the present disclosure, an electrode plate supply device for manufacturing secondary batteries may include: a material box component, including a bottom plate portion and a side wall portion, the bottom plate portion and the side wall portion are combined with each other to form a container for accommodating a stack of multiple electrode plates; a lifting unit, including a supporting member and a driving member combined with the supporting member, the supporting member including a supporting plate arranged in the material box component, the supporting plate positions and supports the stack of multiple electrode plates, wherein the driving member is movable through an opening in the bottom plate portion of the material box component to drive the stack of electrode plates up and down in the material box component; and a sensing member, combined with the lifting unit, the sensing member detects the presence of the bottommost electrode plate in the stack of multiple electrode plates.

[0033] In which, a sensing hole vertically aligned with the sensing member may be formed in the support plate of the electrode plate supply device for manufacturing secondary batteries according to one embodiment of the present disclosure to allow the sensing member to sense the bottom surface of the bottommost electrode plate through the sensing hole.

[0034] In addition, the support plate of the electrode plate supply device for manufacturing a secondary battery according to one embodiment of the present disclosure may form a chamfered portion in an arc shape at the upper end of the sensing hole adjacent to the upper surface where the bottommost electrode plate is placed.

[0035] In addition, in the support plate of the electrode plate supply device for manufacturing a secondary battery according to one embodiment of the present disclosure, the width of the sensing hole may be less than 15 mm, and the curvature radius of the chamfered portion may be greater than 0.5 mm.

[0036] In addition, the upper surface of the support plate of the electrode plate supply device for manufacturing a secondary battery according to one embodiment of the present disclosure, on which the bottommost electrode plate is placed, may be formed in an arc shape.

[0037] In addition, the lower surface of the support plate of the electrode plate supply device for manufacturing a secondary battery according to one embodiment of the present disclosure may be provided with an anchor frame combined with the sensing member.

[0038] In addition, the anchor frame of the electrode plate supply device for manufacturing a secondary battery according to one embodiment of the present disclosure may be disposed inside a surrounding area of ​​the lower surface of the support plate.

[0039] In addition, the sensing member of the electrode plate supply device for manufacturing a secondary battery according to one embodiment of the present disclosure may be a direct reflection type optical sensor.

[0040] In addition, an anchor frame may be provided outside a circumferential area of ​​the lower surface of the support plate of the electrode plate supply device for manufacturing a secondary battery according to one embodiment of the present disclosure, and the sensing member may be coupled to the anchor frame.

[0041] (III) Beneficial effects

[0042] The automatic electrode plate supply device disclosed in the present invention can solve the problem of disconnection of wires and the like connected to the sensing member.

[0043] On the other hand, the automatic electrode plate supply device disclosed in the present invention can improve the problem of the sensing component mis-sensing the electrode plate.

[0044] However, various beneficial advantages and effects of the present disclosure are not limited to the above content and can be more easily understood in the process of describing specific embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 1 is a front view showing the automatic electrode plate supply device of the present disclosure.

[0046] Figure 2 3D is a perspective view showing a lifting unit in the automatic electrode plate supplying device of the present disclosure.

[0047] Figure 3 1 and 2 are a plan view and a front view showing a lifting unit in the automatic electrode plate supplying device of the present disclosure.

[0048] Figure 4 1 is a perspective view showing another embodiment of a lifting unit in the automatic electrode plate supplying device of the present disclosure.

[0049] Figure 5 1 is a plan view and a front view showing another embodiment of a lifting unit in the automatic electrode plate supplying device of the present disclosure.

[0050] Figure 6 2 is a cross-sectional view showing a sensing hole portion of a lifting unit in the electrode plate automatic supply device of the present disclosure.

[0051] Figure 7 1 is a front view showing an embodiment in which the upper surface of the supporting member of the lifting unit in the automatic electrode plate supplying device of the present disclosure has an arc shape.

[0052] Description of Reference Numerals

[0053] 10: Box component 11: Bottom plate

[0054] 12: Side wall 20: Lifting unit

[0055] 21: Support member 22: Driving member

[0056] 30: Sensing component DETAILED DESCRIPTION

[0057] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the embodiments of the present disclosure may be modified in various other ways, and the scope of the present disclosure is not limited to the embodiments described below. In addition, the embodiments of the present disclosure are provided to more completely explain the present disclosure to those of ordinary skill in the art. The shapes and sizes of components may be magnified in the drawings for a clearer description.

[0058] In addition, in this specification, unless the context clearly indicates otherwise, a singular expression includes a plural expression, and the same reference numerals or reference numerals assigned in a similar manner refer to the same components or corresponding components throughout the specification.

[0059] The present disclosure relates to an automatic electrode plate supply device for manufacturing secondary batteries, the automatic electrode plate supply device including a sensing member 30 for sensing the lower surface of an electrode plate E arranged at the bottom of a stack of multiple electrode plates E arranged in a material box member 10, thereby alleviating and solving the problem of disconnection of wires connected to the sensing member 30.

[0060] On the other hand, in the electrode plate automatic supply device of the present disclosure, by configuring the sensing member 30 as a direct reflection type optical sensor, the problem of erroneous sensing of the electrode plate E can be alleviated and solved.

[0061] That is, the electrode plate automatic supply device disclosed in the present invention supplies electrode plates E for manufacturing secondary battery cells. At this time, a sensing member 30 for sensing the depletion of the electrode plate E is arranged on the lifting unit 20 to sense the lower surface of the electrode plate E arranged at the bottom in the stack of multiple electrode plates, thereby solving the above-mentioned problem.

[0062] Here, the secondary battery cell may include: an electrode assembly including an electrode plate E of an anode and a cathode, etc.; and a battery cell main body member covering the electrode assembly. The battery cell main body member may include: a receiving portion for receiving the electrode assembly; and a sealing portion for sealing the periphery of the receiving portion.

[0063] The electrode assembly is contained in the battery cell main body member together with the electrolyte for use. The electrolyte may contain lithium salts such as LiPF6, LiBF4, etc. in an organic solvent such as ethylene carbonate (EC), propylene carbonate (PC), diethyl carbonate (DEC), ethyl methyl carbonate (EMC), dimethyl carbonate (EMC), etc. In addition, the electrolyte may be in a liquid, solid or gel state.

[0064] In addition, the battery cell main body member protects the electrode assembly and contains the electrolyte. For example, the battery cell main body member can be set as a bag-type member or a can-type member. Here, the bag-type member has a form of sealing and containing the electrode assembly on three or four sides, and is generally a member that is configured to fold, join and seal three sides of the upper face and two side faces except one face as the lower face while the electrode assembly is contained inside. And, the can-type member has a form of sealing and containing the electrode assembly on one face, and is generally a member that is configured to fold, join and seal one face of the upper face except three faces of the lower face and two side faces while the electrode assembly is contained inside.

[0065] However, such pouch-type secondary battery cells and can-type secondary battery cells are merely examples, and the secondary battery cells manufactured by supplying the electrode plates E by the electrode plate automatic supplying apparatus of the present disclosure are not limited to such types.

[0066] Specifically, the following description will be given with reference to the accompanying drawings. Figure 1 is a front view showing the electrode plate automatic supply device disclosed in the present invention, referring to Figure 1 The electrode plate automatic supply device of the present disclosure may include a material box component 10 , a lifting unit 20 and a sensing component 30 .

[0067] A plurality of electrode plates E may be stacked in the magazine member 10. The lifting unit 20 is disposed in the magazine member 10. The electrode plate E may be placed on the magazine member 10. The sensing member 30 is coupled to the lifting unit 20 and may sense an electrode plate E disposed at the bottom of the plurality of electrode plates E.

[0068] As described above, the magazine member 10 functions as a housing for stacking a plurality of the electrode plates E. In addition, the uppermost electrode plate E of the plurality of electrode plates E pushed upward by the lifting unit 20 may be discharged through the upper end of the magazine member 10 for manufacturing a secondary battery cell.

[0069] To this end, the magazine member 10 may include a bottom plate portion 11 and a side wall portion 12. That is, the magazine member 10 of the electrode plate automatic supply device according to one embodiment of the present disclosure may include: a bottom plate portion 11, formed with a through hole 11a so that the lifting unit 20 can move up and down through the through hole 11a; and a side wall portion 12, coupled to the bottom plate portion 11. The side wall portion 12 may be configured to cover at least a portion of the side edges of the plurality of electrode plates E.

[0070] As described above, the bottom plate portion 11 may be formed with a through hole 11a to allow the lifting unit 20 to pass through. The through hole 11a may be formed to a size through which the support member 21 of the lifting unit 20 can pass, or may be formed to a size through which only the driving member 22 can pass. In the case where the through hole 11a is formed to a size through which only the driving member 22 can pass, the supporting member 21 may be coupled to the driving member 22 and disposed in the magazine member 10 in a state of being disposed on the upper portion of the bottom plate portion 11.

[0071] In addition, the side wall portion 12 is coupled to an edge portion of the bottom plate portion 11 to prevent the stacked plurality of electrode plates E from being separated from each other.

[0072] The side wall portion 12 may be coupled to the bottom plate portion 11 to guide the stack of the plurality of electrode plates E to move upward while preventing any electrode plate E from being separated.

[0073] The side wall portion 12 may be coupled to the bottom plate portion 11 to guide the stack of the plurality of electrode plates to move upward while preventing any electrode plate E from moving in a lateral direction.

[0074] To this end, the side wall portion 12 may be configured to cover at least a portion of the edge portion of the electrode plate E. For example, the side wall portion 12 may be configured to cover the cross-sectional shape (when viewed from the top) of the corners of the vertex portion of each electrode plate E of the stack of electrode plates disposed in the material box member 10. For example, the side wall portion 12 may be configured to cover the cross-sectional shape (when viewed from the top) of the corners of the vertex portion of each electrode plate E of the stack of electrode plates disposed in the material box member 10. Figure 1 The side wall portion 12 may be configured to have a straight cross-sectional shape covering at least a portion of each of the four sides of each electrode plate E in another embodiment (not shown). The electrode plate E may have a substantially rectangular planar shape.

[0075] The lifting unit 20 is a structure for placing the bottommost electrode plate E provided in the material box member 10, and the remaining electrode plates among the plurality of electrode plates E of the electrode stack are stacked on the bottommost electrode plate E. That is, the lifting unit 20 plays a role in supporting the plurality of electrode plates E in a fixed state. In addition, the lifting unit 20 can also play a role in pushing the electrode plates E upward to the upper part of the material box member 10. That is, the lifting unit 20 can be used to push the stack of the electrode plates E upward so that the electrode plate provided at the uppermost part among the plurality of electrode plates E is pushed upward to the upper end of the material box member 10 to manufacture a secondary battery cell.

[0076] To this end, the lifting unit 20 may include a supporting member 21 and a driving member 22, which will be referred to later. Figures 2 to 5 Provide detailed explanation.

[0077] The sensing member 30 serves to sense whether the stack of the electrode plates E provided in the material box member 10 is exhausted. That is, the sensing member 30 senses whether the stacked plurality of electrode plates E are exhausted when they are supplied to manufacture a secondary battery cell. To this end, the sensing member 30 may be provided on the lifting unit 20. Therefore, the sensing member 30 senses the electrode plate E provided at the bottom of the electrode plates E. For example, the sensing member 30 senses the lower surface of the electrode plate E provided at the bottom of the electrode plates E.

[0078] In addition, since the sensing member 30 is arranged on the lifting unit 20, the sensing member 30 only moves up and down together with the lifting unit 20 without moving left and right through a swinging operation. Therefore, the problem of disconnection of wires connected to the sensing member 30 can be alleviated and solved.

[0079] In addition, the sensing member 30 of the electrode plate automatic supply device according to one embodiment of the present disclosure may be a direct reflection type light sensor. That is, instead of using a color sensor that senses the color difference between the color of the electrode plate E and the material box component 10 on which the electrode plate E is set, a direct reflection type light sensor that only senses whether the electrode plate E and other components exist is used, thereby alleviating and solving the problem of false sensing caused by light interference from the surrounding environment. In addition, the sensing member 30 may be a direct reflection type light sensor. The direct reflection type light sensor only detects the presence or absence of the target component (i.e., the electrode plate E of this embodiment). The direct reflection type light sensor can reduce the false sensing error that may be caused by using a color sensor that detects the color difference between the color of the electrode plate E and the color of the material box component 10.

[0080] Here, the direct reflection type optical sensor is an optical sensor that integrates a light emitting unit and a light receiving unit, and when light emitted from the light emitting unit is reflected by a detection object and incident on the light receiving unit, the amount of light is determined and output.

[0081] Conventionally, the upper surface of the uppermost electrode plate E is observed and sensed from top to bottom, so when a direct reflection type light sensor is used, the bottom plate portion 11 of the material box component 10 and the electrode plate E cannot be distinguished, and the component is always sensed. Therefore, according to the conventional structure, a direct reflection type light sensor cannot be used and only a color sensor can be used. However, in the present disclosure, the lower surface of the bottommost electrode plate E is observed and sensed from bottom to top, so it is not necessary to sense the material box component 10 with an upper end opening, but only the electrode plate E is sensed. Therefore, it is not necessary to distinguish the color difference between the material box component 10 and the electrode plate E, but only to sense whether the component exists, so a direct reflection type light sensor can be used. The conventional automatic supply device for electrode plates includes a sensing component that senses the upper surface of the uppermost electrode plate in the stack of electrode plates. Since the sensing component cannot distinguish between the bottom plate portion of the material box component 10 and the electrode plate inside the material box component 10, the conventional device cannot use a direct reflection type light sensor. Therefore, the conventional device should use a color sensor. However, in the embodiment of the present disclosure, a sensing member 30 is used to detect the presence or absence of the electrode plate E by sensing the electrode plate E located at the bottom of the plurality of electrode plates E. Since the cartridge member 10 has an open upper end, the sensing member 30 may not sense any member other than the electrode plate E. Therefore, a direct reflection type optical sensor may be used in the embodiment of the present disclosure.

[0082] Figure 2 is a perspective view showing the lifting unit 20 in the electrode plate automatic supply device of the present disclosure, Figure 3 1 is a plan view and a front view showing the lifting unit 2 in the electrode plate automatic supply device of the present disclosure, that is, an embodiment in which the sensing member 30 can be disposed inside the peripheral area A of the support plate 21d of the support member 21 is shown.

[0083] Figure 4 is a perspective view showing another embodiment of the lifting unit 20 in the electrode plate automatic supply device of the present disclosure, Figure 5 1 is a plan view and a front view showing another embodiment of the lifting unit 20 in the electrode plate automatic supply device of the present disclosure, that is, an embodiment in which the sensing member 30 can be disposed outside the peripheral area A of the support plate 21d of the support member 21 is shown.

[0084] Referring to the figure, the lifting unit 20 of the electrode plate automatic supply device according to one embodiment of the present disclosure may include a support member 21 combined with the sensing member 30. The support member 21 moves up and down through the bottom plate portion 11 of the material box member 10. The bottommost electrode plate E can be placed on the material box member 10. The lifting unit 20 may further include a driving member 22 coupled to the supporting member 21. The driving member 22 can move the supporting member 21 up and down.

[0085] That is, in order to move the electrode plate E to the upper portion of the magazine member 10 , the electrode plate E is placed and supported on the support member 21 , and the driving member 22 is configured to move the support member 21 up and down.

[0086] Here, the support member 21 has a plate shape and is configured to place the electrode plate E. In addition, bolts may be provided through the support member 21 so as to be coupled to the driving member 22. In other words, the bolts may pass through the support member 21 and the driving member 22 to be coupled together.

[0087] In addition, a sensing hole 21a may be formed in the support member 21 so that the sensing member 30 can sense the lower surface of the electrode plate E. That is, the sensing hole 21a is formed in the upper and lower directions in the support member 21 of the electrode plate automatic supply device according to one embodiment of the present disclosure, and the sensing member 30 may be coupled to the support member 21 so that the sensing member 30 can sense the light passing through the sensing hole 21a and sense the lower surface of the electrode plate E.

[0088] Here, a sensing hole 21 a may be formed in the support member 21 just above where the sensing member 30 is disposed.

[0089] As described above, the sensing member 30 is coupled to the supporting member 21 and is configured to sense the electrode plate E from bottom to top. Therefore, the sensing member 30 does not need to move left and right through a swing operation, thereby alleviating and solving problems such as disconnection of wires.

[0090] In addition, the support member 21 may include an anchor frame 21c to be combined with the sensing member 30. That is, in the support member 21 of the electrode plate automatic supply device according to one embodiment of the present disclosure, the anchor frame 21c combined with the sensing member 30 may be provided on the lower surface (also referred to as the bottom surface) of the support member 21. The anchor frame 21c may be provided on the bottom surface of the support member 21 and the sensing member 30 may be combined with the anchor frame 21c.

[0091] Such an anchor frame 21c can couple the sensing member 30 to the lower surface of the supporting member 21. Figure 2 and Figure 3 In the first embodiment shown, the anchor frame 21c is disposed inside the surrounding area A of the support plate 21d of the support member 21. That is, the anchor frame 21c of the electrode plate automatic supply device according to one embodiment of the present disclosure can be disposed inside the surrounding area A of the lower surface of the support member 21. In this case, the size of the through hole formed in the bottom plate portion of the magazine member 10 through which the support member 21 passes can be formed small.

[0092] exist Figure 4 and Figure 5 In the second embodiment shown, the anchor frame 21c is disposed outside the surrounding area A of the support plate 21d of the support member 21. In this case, the sensing hole 21a is not formed in the support plate 21d of the support member 21. The sensing hole 21a can be formed by adjusting the interval between the support plate 21d and the anchor frame 21c.

[0093] In addition, refer to Figure 6 A chamfered portion 21b in an arc shape may be formed around the upper end of the sensing hole 21a to prevent the electrode plate E placed on the support member 21 from being marked by the sensing hole 21a. In addition, the curvature radius R of the chamfered portion 21b and the width W of the sensing hole 21a may be limited. This will be referred to later. Figure 6 Provide detailed explanation.

[0094] The driving member 22 plays a role in moving the supporting member 21 up and down in the magazine member 10. To this end, the driving member 22 can be coupled to the supporting member 21 by bolts, etc. In addition, the driving member 22 may include a hydraulic cylinder / pneumatic cylinder, a motor, etc. to provide a driving force for moving the supporting member 21 up and down.

[0095] Figure 6 It is a cross-sectional view showing a sensing hole 21a portion of a lifting unit 20 in an automatic electrode plate supplying device of the present disclosure. Referring to the figure, the supporting member 21 of the automatic electrode plate supplying device according to an embodiment of the present disclosure can form a chamfered portion 21b in a circular arc shape at the upper end portion of the sensing hole 21a adjacent to the upper surface of the supporting member 21 on which the electrode plate E is placed.

[0096] That is, a chamfered portion 21 b in a circular arc shape may be formed around the upper end portion of the sensing hole 21 a to prevent the electrode plate E placed on the supporting member 21 from being marked by the sensing hole 21 a.

[0097] In other words, when a plurality of the electrode plates E are stacked on the support member 21, their self-weight is large and may cause marks to be formed on the electrode plate E disposed at the bottom. Therefore, in order to prevent the bottom electrode plate E in contact with the support member 21 from being marked by the sensing hole 21a, a chamfered portion 21b may be formed at the upper end of the sensing hole 21a.

[0098] In addition, the curvature radius R of the chamfered portion 21b and the width W of the sensing hole 21a may be limited. That is, in the support member 21 of the electrode plate automatic supply device according to one embodiment of the present disclosure, the width W of the sensing hole 21a is at least less than 15 mm, and the curvature radius R of the chamfered portion 21b is at least greater than 0.5 mm.

[0099] The numerical limit described above is a numerical range that prevents the bottommost electrode plate from generating marks. When the numerical limit is out of this numerical range, the probability of generating marks that may reduce the performance of the electrode plate E will increase.

[0100] Figure 7 It is a front view showing an embodiment in which the upper surface of the supporting member 21 of the lifting unit 20 in the automatic electrode plate supplying device of the present disclosure has an arc shape. Referring to the figure, according to an embodiment of the automatic electrode plate supplying device of the present disclosure, the upper surface of the supporting member 21 on which the electrode plate E is placed can be formed into an arc shape.

[0101] That is, the upper surface of the support member 21 on which the electrode plate E is placed is formed into an arc shape, so that the plurality of stacked electrode plates E are bent due to their own weight corresponding to the arc shape of the upper surface of the support member 21. Therefore, the problem of the electrode plate E sinking into the sensing hole 21a and causing an imprint can be solved.

[0102] Here, the radius of curvature of the arc of the support member 21 may be defined such that the electrode plate E bends within an elastic limit when bent due to its own weight.

[0103] The embodiments of the present disclosure are described above, but the scope of rights of the present disclosure is not limited thereto, and various modifications and changes can be made without departing from the technical concept of the present disclosure recorded in the claims, which is obvious to ordinary technicians in this technical field.

Claims

1. An automatic electrode plate supply device, comprising: a magazine member, a plurality of electrode plates being placed on top of each other to form a stack; a lifting unit operably coupled to the magazine component to support and move a stack of the plurality of electrode plates in the magazine component; as well as a sensing member disposed on the lifting unit, wherein the sensing member senses the bottommost electrode plate disposed at the bottommost position in the stack of the plurality of electrode plates; Wherein, the lifting unit comprises: a supporting member, combined with the sensing member, the supporting member being movable up and down in the magazine member by a driving member; and The driving member is coupled to the supporting member and moves the supporting member up and down in the magazine member, The bottommost electrode plate of the stack of multiple electrode plates is placed on the support member. Wherein, the supporting member comprises: A support plate, disposed in the material box component, the support plate positions and supports a stack of a plurality of the electrode plates; an anchor rod frame disposed outside a circumferential area of ​​the support plate and coupled to the sensing member; and A sensing hole is formed between the support plate and the anchor frame, and wherein the sensing member senses a bottom surface of the bottommost electrode plate through the sensing hole.

2. The device according to claim 1, wherein: The supporting member is formed such that a width of the sensing hole is less than 15 mm.

3. The device according to claim 1, wherein: An upper surface of the support member on which the bottommost electrode plate is placed is formed in an arc shape.

4. The device according to claim 1, wherein: The sensing member is a direct reflection type light sensor.

5. The device according to claim 1, wherein: The material box component comprises: a bottom plate portion having a through hole formed therein so that the lifting unit can move through the bottom plate portion; and The side wall portion is coupled to the bottom plate portion and is provided to cover at least a portion of an edge of each of the plurality of electrode plates.

6. An electrode plate supply device for manufacturing a secondary battery, the device comprising: a material box member including a bottom plate portion and a side wall portion, the bottom plate portion and the side wall portion being combined with each other to form a container for accommodating a stack of a plurality of electrode plates; a lifting unit, comprising a supporting member and a driving member coupled to the supporting member, the supporting member comprising a supporting plate disposed in the magazine member, the supporting plate positioning and supporting a stack of a plurality of the electrode plates, wherein the driving member is movable through an opening of a bottom plate portion of the magazine member to drive the stack of the electrode plates up and down in the magazine member; as well as a sensing member coupled to the lifting unit, the sensing member detecting the presence of the bottommost electrode plate in the stack of the plurality of electrode plates, Wherein, the supporting member comprises: an anchor frame disposed outside a circumferential area of ​​a lower surface of the support plate and coupled to the sensing member; and A sensing hole is formed between the support plate and the anchor frame and is vertically aligned with the sensing member to allow the sensing member to sense a bottom surface of the bottommost electrode plate through the sensing hole.

7. The device according to claim 6, wherein: The support plate is formed such that a width of the sensing hole is less than 15 mm.

8. The device according to claim 7, wherein: In the support plate, an upper surface on which the electrode plate is placed is formed in an arc shape.

9. The device according to claim 6, wherein: The sensing member is a direct reflection type light sensor.

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