Lamination method and lamination equipment for battery piece fragments

Abstract

The invention discloses a lamination method and lamination equipment for battery piece fragments, and the lamination method comprises the steps: enabling a plurality of battery piece fragments to be arranged and moved at intervals, and enabling at least one of the plurality of battery piece fragments to move to a first position for restoration; the at least one corrected cell slice is carried and moved to the position above the second position, the preset area of the cell slice is bent, and the bent protrusion makes contact with the part of the overlapping area of the second position; the at least one cell slice descends towards the stacking area, the preset area abuts against the portion of the stacking area, the preset area and the portion of the stacking area are relatively fixed, other areas of the cell slice approach and make contact with the stacking area, and the cell slice recovers to the initial state. According to the scheme, the problems that in the prior art, during lamination, air suction on the two sides needs to be matched through synchronous position adjustment, secondary restoration is needed after each time of lamination, the two steps have the interactive avoiding requirement and are complex, the lamination action also needs to wait for secondary restoration, and the lamination efficiency is affected can be solved.

Description

Technical Field

[0001] The present invention relates to the field of battery cell stacking, and in particular to a battery cell stacking method and stacking equipment. Background Art

[0002] In the cross-section passivation process of battery cell slices, multiple battery slices need to be stacked with their cross sections facing one side, and then passivated uniformly, thereby improving the passivation efficiency of the battery cell slices.

[0003] Since the battery cell slices are very light, when the battery cell slices are placed and stacked one by one, it is difficult to directly discharge the air in the middle of the battery cell slices when they are stacked. The air is likely to cause the battery cell slices to deflect or relatively shift when discharged. In the related art, when the battery cell slices are stacked, a negative pressure environment is formed between the battery cell slices and the supporting surface by suction on both sides. After the battery cell slices are stacked, a secondary correction is performed to ensure the neatness of the stacking effect. However, the above method will cause the suction on both sides of each battery cell slice to adjust the position synchronously when stacking, and a secondary correction is required after each stacking. There is a need for interactive avoidance between the two steps, which is relatively complicated. The next set of stacking actions also needs to wait until the secondary correction is completed before proceeding, which also affects the stacking efficiency. Summary of the invention

[0004] The object of the present invention is to provide a method and equipment for stacking battery cells to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for stacking battery cells, comprising: A plurality of battery cell segments are arranged at intervals and moved, and at least one of the plurality of battery cell segments is moved to a first position and aligned.

[0006] After being transported and straightened, at least one of the battery cell slices is moved above the second position, a preset area of ​​the battery cell slice is bent, and the bending protrusion faces downward, and the bending protrusion contacts a portion of the overlapping area of ​​the second position, wherein the first position is different from the second position.

[0007] At least one of the battery cell slices moves downward toward the overlapping area, the preset area abuts against part of the overlapping area, the preset area and part of the overlapping area are relatively fixed, other areas of the battery cell slice approach and contact the overlapping area, and the battery cell slice returns to being flat and is overlapped on the overlapping area.

[0008] Preferably, the preset area is a middle area of ​​the battery cell slice.

[0009] Preferably, the preset area is any one of a plurality of edge areas of the battery cell slice.

[0010] Preferably, the preset area includes at least two of a middle area and a plurality of edge areas of the battery cell slice.

[0011] The present application also discloses a stacking device for implementing the above-mentioned stacking method, including a conveying mechanism, a straightening mechanism, a sheet moving mechanism, a bending mechanism and a supporting mechanism, wherein the conveying mechanism is used to carry a plurality of the battery cell segments arranged at intervals, the straightening mechanism is arranged at the discharge end of the conveying mechanism, the straightening mechanism is used to straighten the battery cell segments moved to the discharge end of the conveying mechanism, the sheet moving mechanism is used to move the battery cell segments after straightening the discharge end of the conveying mechanism to the supporting mechanism, and the bending mechanism is used to bend the preset area of ​​the battery cell segments grasped by the sheet moving mechanism.

[0012] Preferably, the sheet moving mechanism comprises a translation driving member, a first lifting driving member and a sheet sucking hand, the first lifting driving member is arranged on the driving end of the translation driving member, the sheet sucking hand is arranged on the driving end of the first lifting driving member, and the bending mechanism is arranged on the sheet sucking hand.

[0013] Preferably, the plurality of suction cups of the film suction arm are arranged around the bending mechanism, or the bending mechanism and the plurality of suction cups are arranged around the periphery of the film suction arm.

[0014] Preferably, the bending mechanism comprises a telescopic driving member and a pressing member, the telescopic driving member is arranged on the suction piece hand, and the pressing member is arranged on the driving end of the telescopic driving member.

[0015] Preferably, the bending mechanism is an elastic pressing piece, the elastic pressing piece is arranged on the sheet suction hand, and the pressing surface of the elastic pressing piece is lower than the adsorption surface of the sheet suction hand.

[0016] Preferably, the bending mechanism includes a second lifting drive member and at least one bending hand, the second lifting drive member is arranged on the supporting mechanism, at least one bending hand is arranged on the driving end of the second lifting drive member, the second lifting drive member can drive at least one bending hand to lift and lower, and the bending hand is used to bend the preset area.

[0017] The technical solution adopted in this application can achieve the following beneficial effects: In one aspect, the present application discloses a lamination method, the disclosed lamination method comprising: The plurality of battery cell segments are arranged at intervals and moved, and at least one of the plurality of battery cell segments is moved to a first position and aligned.

[0018] In this step, the battery cell is formed into battery cell slices by laser non-destructive scribing and mechanical splitting. This is the existing technology and will not be elaborated here. At least one of the multiple battery cell slices is moved to the first position for correction, so that the subsequent transportation of at least one battery cell slice is consistent.

[0019] After being transported and corrected, at least one battery cell segment is moved to above the second position, a preset area of ​​the battery cell segment is bent, and the bending protrusion faces downward, and the bending protrusion contacts a portion of the overlapping area of ​​the second position, wherein the first position is different from the second position.

[0020] In this step, the preset area of ​​the battery cell slice is bent so that the battery cell slice forms a bent protrusion with the bent protrusion facing downward, and the bent protrusion contacts the portion of the overlapping area of ​​the second position, so that the battery cell slice is stacked based on the bent protrusion and the portion of the overlapping area of ​​the second position, which is beneficial to ensure the neatness of the stacking.

[0021] At least one battery cell segment moves downward toward the overlapping area, the preset area abuts against part of the overlapping area, the preset area and part of the overlapping area are relatively fixed, other areas of the battery cell segment approach and contact the overlapping area, and the battery cell segment returns to its initial state.

[0022] In this step, all areas of the battery cell slices except the preset area are close to the overlapping area until they are fully in contact. During the process, other areas will squeeze out the air between the overlapping area. Since the preset area contacts the overlapping area, the preset area and the overlapping area are relatively fixed, and the battery cell slices cannot have relative displacement, thereby avoiding relative displacement of the battery cell slices.

[0023] The above method causes the battery cell slices to bend in a preset area before stacking so that part of the battery cell slices contacts part of the stacking area, and other areas of the battery cell slices descend until they contact the stacking area. The stacking method has simple steps and does not require additional suction and secondary correction steps, which saves time and effort and improves stacking efficiency.

[0024] On the other hand, the present application also discloses a lamination device for implementing the above-mentioned lamination method. The disclosed lamination device includes a conveying mechanism, a straightening mechanism, a sheet moving mechanism, a bending mechanism and a bearing mechanism.

[0025] Specifically, the conveying mechanism is used to carry a plurality of spaced-apart battery cell slices, the correcting mechanism is arranged at the discharge end of the conveying mechanism, the correcting mechanism is used to correct the battery cell slices moved to the discharge end of the conveying mechanism, the sheet moving mechanism is used to move the battery cell slices after the discharge end of the conveying mechanism is corrected to the carrying mechanism, and the bending mechanism is used to bend a preset area of ​​the battery cell slice grasped by the sheet moving mechanism.

[0026] During the use of the stacking equipment, the conveying mechanism carries a plurality of spaced-apart battery cell slices, and the straightening mechanism straightens the battery cell slices moved to the discharge end of the conveying mechanism, wherein at least a portion of the discharge end of the conveying mechanism can be in the first position, and the sheet moving mechanism straightens the battery cell slices at the discharge end of the conveying mechanism and moves them to the carrying mechanism, and the bending mechanism bends a preset area of ​​the battery cell slice grasped by the sheet moving mechanism, that is, the bending mechanism can bend the preset area of ​​the battery cell slice after the sheet moving mechanism grasps the straightened battery cell slice at the discharge end of the conveying mechanism, or the bending mechanism can bend the preset area of ​​the battery cell slice when the sheet moving mechanism moves the battery cell slice to the carrying mechanism, and the present application does not impose any restrictions on this. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 A diagram showing the steps of a stacking method for cell slices disclosed in an embodiment of the present application; Figure 2 A schematic diagram of the middle area and edge area of ​​the battery cell slice disclosed in the embodiment of the present application; Figure 3 A schematic diagram of the structure of the lamination device disclosed in the embodiment of the present application; Figure 4 It is a front view of the lamination device disclosed in the embodiment of the present application.

[0029] In the figure: 100, conveying mechanism; 200, straightening mechanism; 300, sheet moving mechanism; 310, translation driving member; 320, first lifting driving member; 330, sheet suction arm; 400, bending mechanism; 500, carrying mechanism. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0031] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0033] like Figure 1 and Figure 2 As shown, the present application discloses a method for stacking battery cells, and the disclosed stacking method includes: S101, a plurality of battery cell slices are arranged and moved at intervals, and at least one of the plurality of battery cell slices is moved to a first position and aligned.

[0034] In this step, the battery cell is formed into battery cell slices by laser non-destructive scribing and mechanical splitting. This is the existing technology and will not be elaborated here. At least one of the multiple battery cell slices is moved to the first position for correction, so that the subsequent transportation of at least one battery cell slice is consistent.

[0035] S102, at least one battery cell slice after being transported and straightened is moved to above the second position, a preset area of ​​the battery cell slice is bent, and the bending protrusion faces downward, and the bending protrusion contacts a portion of the overlapping area of ​​the second position, wherein the first position is different from the second position.

[0036] In this step, the preset area of ​​the battery cell slice is bent so that the battery cell slice forms a bent protrusion with the bent protrusion facing downward, and the bent protrusion contacts the portion of the overlapping area of ​​the second position, so that the battery cell slice is stacked based on the bent protrusion and the portion of the overlapping area of ​​the second position, which is beneficial to ensure the neatness of the stacking.

[0037] S103, at least one battery cell slice moves downward toward the overlapping area, the preset area abuts against a portion of the overlapping area, the preset area and a portion of the overlapping area are relatively fixed, other areas of the battery cell slice approach and contact the overlapping area, and the battery cell slice returns to an initial state.

[0038] In this step, all areas of the battery cell slices except the preset area are close to the overlapping area until they are fully in contact. During the process, other areas will squeeze out the air between the overlapping area. Since the preset area contacts the overlapping area, the preset area and the overlapping area are relatively fixed, and the battery cell slices cannot have relative displacement, thereby avoiding relative displacement of the battery cell slices.

[0039] The above method causes the battery cell slices to bend in a preset area before stacking so that part of the battery cell slices contacts part of the stacking area, and other areas of the battery cell slices descend until they contact the stacking area. The stacking method has simple steps and does not require additional suction and secondary correction steps, which saves time and effort and improves stacking efficiency.

[0040] In the first optional scheme, the preset area can be the middle area of ​​the battery cell slice, wherein the other areas of the battery cell slice except the preset area are close to the overlapping area until they are fully in contact. The air between the overlapping area and the other areas will be divided into two parts and squeezed out along the opposite sides of the middle area, thereby avoiding relative displacement of the battery cell slices.

[0041] In a second optional solution, the preset area may be any one of the multiple edge areas of the battery cell segment. The multiple edge areas may be the four corner areas of the battery cell segment, the interval areas between the four corner areas, etc., wherein the other areas of the battery cell segment except the preset area are close to the overlapping area, and in the process of complete contact, the air between the other areas and the overlapping area will be squeezed out in the direction away from the preset area, thereby avoiding relative displacement of the battery cell segment.

[0042] In a third optional scheme, the preset area may include a middle area and at least two of the multiple edge areas of the battery cell slice, wherein other areas of the battery cell slice except the middle area and at least two of the multiple edge areas are close to the overlapping area, until the middle area and at least two of the multiple edge areas are able to constrain the battery cell slice to prevent relative rotation during the process of full contact.

[0043] like Figure 3 and Figure 4 As shown, the present application also discloses a lamination device for implementing the above-mentioned lamination method. The disclosed lamination device includes a conveying mechanism 100 , a straightening mechanism 200 , a sheet moving mechanism 300 , a bending mechanism 400 and a bearing mechanism 500 .

[0044] Specifically, the conveying mechanism 100 is used to carry a plurality of spaced-apart battery cell slices, the correcting mechanism 200 is disposed at the discharge end of the conveying mechanism 100, the correcting mechanism 200 is used to correct the battery cell slices moved to the discharge end of the conveying mechanism 100, the sheet moving mechanism 300 is used to move the battery cell slices after the discharge end of the conveying mechanism 100 is corrected to the carrying mechanism 500, and the bending mechanism 400 is used to bend a preset area of ​​the battery cell slice grasped by the sheet moving mechanism 300.

[0045] During the use of the stacking equipment, the conveying mechanism 100 carries a plurality of spaced-apart battery cell slices, the alignment mechanism 200 alignment moves the battery cell slices to the discharge end of the conveying mechanism 100, wherein at least a portion of the discharge end of the conveying mechanism 100 can be in the first position, the sheet moving mechanism 300 moves the battery cell slices after the discharge end of the conveying mechanism 100 is aligned to the supporting mechanism 500, and the bending mechanism 400 bends a preset area of ​​the battery cell slices grasped by the sheet moving mechanism 300, that is, the bending mechanism 400 can bend the preset area of ​​the battery cell slices after the sheet moving mechanism 300 grasps the battery cell slices after the discharge end of the conveying mechanism 100 is aligned, or the bending mechanism 400 can bend the preset area of ​​the battery cell slices when the sheet moving mechanism 300 moves the battery cell slices to the supporting mechanism 500, and the present application does not impose any restrictions on this. The above-mentioned device has fewer components and a simple structure, and also avoids the need for additional drive components, alignment components and suction components on the supporting mechanism 500, thereby facilitating a simplified design of the lamination device.

[0046] Of course, the conveying mechanism 100 can be a conveyor belt material channel, a transport fork material channel, a roller material channel, etc., and this application does not impose any restrictions on this; the correction mechanism 200 can be a specific structure such as a cylinder and push rod combination, a hard limit structure, etc., and this application does not impose any restrictions on this.

[0047] In addition, there can be multiple carrying mechanisms 500. The sheet moving mechanism 300 straightens the discharge end of the conveying mechanism 100 and then moves the battery cell slices to multiple carrying mechanisms 500. Of course, there can also be multiple sheet moving mechanisms 300, which are adapted to multiple carrying mechanisms 500 one by one, so that multiple carrying mechanisms 500 can all carry multiple stacked battery cell slices.

[0048] In an embodiment of the present application, the film moving mechanism 300 may include a translation driving member 310, a first lifting driving member 320 and a film suction arm 330. Specifically, the first lifting driving member 320 is arranged on the driving end of the translation driving member 310, the film suction arm 330 is arranged on the driving end of the first lifting driving member 320, and the bending mechanism 400 is arranged on the film suction arm 330.

[0049] The above structure provides the film suction arm 330 with two degrees of freedom in different directions through the translation drive 310 and the first lifting drive 320, and is also conducive to the side-by-side arrangement of the conveying mechanism 100 and the carrying mechanism 500, thereby facilitating the reasonable arrangement of the space of the lamination equipment.

[0050] Among them, the translation drive component 310 can be a specific structure such as an electric cylinder, a pneumatic cylinder, a servo motor and its matching transmission parts, and the present application does not impose any restrictions on this; the first lifting drive component 320 can be a specific structure such as an electric cylinder, a pneumatic cylinder, a servo motor and its matching transmission parts, and the present application does not impose any restrictions on this.

[0051] In the embodiment of the present application, the multiple suction cups of the sucking arm 330 are arranged around the bending mechanism 400, or the bending mechanism 400 and the multiple suction cups are arranged around the periphery of the sucking arm 330. Among them, the multiple suction cups of the sucking arm 330 are arranged around the bending mechanism 400, and the bending mechanism 400 can cooperate with the sucking arm 330 to bend the middle area of ​​the battery cell slice when sucking the battery cell slice; the bending mechanism 400 and the multiple suction cups are arranged around the periphery of the sucking arm 330, and the bending mechanism 400 can cooperate with the sucking arm 330 to bend one of the edge areas of the battery cell slice opposite to the bending mechanism 400 when sucking the battery cell slice.

[0052] In the embodiment of the present application, the bending mechanism 400 may include a telescopic driving member and a pressing member. Specifically, the telescopic driving member is disposed on the suction arm 330, and the pressing member is disposed at the driving end of the telescopic driving member.

[0053] In an optional solution, the bending mechanism 400 can be an elastic pressing piece. Specifically, the elastic pressing piece is arranged on the sucking arm 330, and the pressing surface of the elastic pressing piece is lower than the adsorption surface of the sucking arm 330. When the bending mechanism 400 bends the battery cell slice grasped by the sheet moving mechanism 300, the elastic pressing piece deforms and contacts the battery cell slice after being straightened at the discharge end, and the elastic pressing piece contacts the preset area of ​​the battery cell slice to form a bending protrusion.

[0054] Of course, the elastic pressing part can be a silicone column, a rubber column, a sponge column, a polyurethane column, etc., and this application does not impose any restrictions on this.

[0055] In addition, the bending mechanism 400 can be a pressing column and a telescopic cylinder. The telescopic cylinder is arranged on the suction arm 330, and the pressing column is arranged at the driving end of the telescopic cylinder. When the suction arm 330 stacks the battery cells, the telescopic cylinder drives the pressing column to move to contact the preset area to cause it to bend and deform.

[0056] In another optional scheme, the bending mechanism 400 may include a second lifting drive member and at least one bending hand. Specifically, the second lifting drive member is arranged on the supporting mechanism 500, and at least one bending hand is arranged on the driving end of the second lifting drive member. The second lifting drive member can drive at least one bending hand to lift and lower, and the bending hand is used to bend a preset area.

[0057] During the operation of the bending mechanism 400, the second lifting drive member drives at least one bending hand to move close to the battery cell slice transported by the sheet moving mechanism 300, wherein, if there is only one bending hand, the bending hand contacts the edge area of ​​the battery cell slice transported by the sheet moving mechanism 300 to bend it, and when the bending protrusion contacts the part of the overlapping area at the second position, the bending hand detaches from the battery cell slice, the battery cell slice restores to flatness and makes other areas of itself approach and contact the overlapping area; if there are more than two bending hands, the bending hand contacts the edge area of ​​the battery cell slice transported by the sheet moving mechanism 300 to bend the middle area, and when the bending protrusion contacts the part of the overlapping area at the second position, the two or more bending hands all detach from the battery cell slice, the battery cell slice restores to flatness and makes other areas of itself approach and contact the overlapping area.

[0058] In addition, the second lifting drive component can be a specific structure such as an electric cylinder, a pneumatic cylinder, a servo motor and its matching transmission parts, and this application does not impose any restrictions on this.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for stacking battery cells, characterized in that: include: A plurality of battery cell segments are arranged and moved at intervals, and at least one of the plurality of battery cell segments is moved to a first position and aligned; At least one of the battery cell segments after being transported and corrected is moved to above a second position, a preset area of ​​the battery cell segment is bent, and a bending protrusion faces downward, and the bending protrusion contacts a portion of the overlapping area of ​​the second position, wherein the first position is different from the second position; At least one of the battery cell slices moves downward toward the overlapping area, the preset area abuts against part of the overlapping area, the preset area and part of the overlapping area are relatively fixed, other areas of the battery cell slice approach and contact the overlapping area, and the battery cell slice returns to being flat and is overlapped on the overlapping area.

2. The lamination method according to claim 1, characterized in that: The preset area is the middle area of ​​the battery cell slice.

3. The lamination method according to claim 1, characterized in that: The preset area is any one of a plurality of edge areas of the battery cell segment.

4. The lamination method according to claim 1, characterized in that: The preset area includes at least two of the middle area and a plurality of edge areas of the battery cell slice.

5. A lamination device, used to implement the lamination method according to any one of claims 1 to 4, characterized in that: The invention comprises a conveying mechanism (100), a straightening mechanism (200), a sheet moving mechanism (300), a bending mechanism (400) and a carrying mechanism (500), wherein the conveying mechanism (100) is used to carry a plurality of battery sheet segments arranged at intervals, the straightening mechanism (200) is arranged at the discharge end of the conveying mechanism (100), the straightening mechanism (200) is used to straighten the battery sheet segments moved to the discharge end of the conveying mechanism (100), the sheet moving mechanism (300) is used to move the battery sheet segments after straightening the discharge end of the conveying mechanism (100) to the carrying mechanism (500), and the bending mechanism (400) is used to bend the preset area of ​​the battery sheet segments grasped by the sheet moving mechanism (300).

6. The lamination device according to claim 5, characterized in that: The sheet-moving mechanism (300) comprises a translation driving member (310), a first lifting driving member (320) and a sheet-sucking hand (330); the first lifting driving member (320) is arranged on the driving end of the translation driving member (310); the sheet-sucking hand (330) is arranged on the driving end of the first lifting driving member (320); and the bending mechanism (400) is arranged on the sheet-sucking hand (330).

7. The lamination device according to claim 6, characterized in that: The plurality of suction cups of the film suction hand (330) are arranged around the bending mechanism (400), or the bending mechanism (400) and the plurality of suction cups are arranged around the periphery of the film suction hand (330).

8. The lamination device according to claim 6, characterized in that: (400) comprises a telescopic driving member and a pressing member, wherein the telescopic driving member is arranged on the suction piece hand (330), and the pressing member is arranged at the driving end of the telescopic driving member.

9. The lamination device according to claim 6, characterized in that: The bending mechanism (400) is an elastic pressing piece, which is arranged on the film suction hand (330), and the pressing surface of the elastic pressing piece is lower than the suction surface of the film suction hand (330).

10. The lamination device according to claim 5, characterized in that: The bending mechanism (400) comprises a second lifting drive member and at least one bending hand, wherein the second lifting drive member is arranged on the supporting mechanism (500), and at least one bending hand is arranged on the driving end of the second lifting drive member, and the second lifting drive member can drive at least one bending hand to rise and fall, and the bending hand is used to bend the preset area.

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