Lithium ion battery lamination device

Abstract

The utility model discloses a lithium ion battery lamination device in the technical field of lithium ion batteries, and aims to solve the problem of waiting time when positive and negative electrode unit sheets are alternately stacked in the prior art. The device comprises a rotating platform and a plurality of lamination tables arranged on the rotating platform, after sheets are placed, when a carrying manipulator takes materials, the sheets are rotated to the next lamination table through the rotating platform, and the cut positive electrode unit sheets and the cut negative electrode composite unit sheets are sequentially stacked on the different lamination tables at the same time. According to the utility model, waiting time during alternate stacking of positive and negative electrode unit sheets and blanking auxiliary time after single battery cells are stacked can be effectively avoided, and the production efficiency of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion batteries, in particular to a lithium ion battery lamination device. Background Art

[0002] The existing lithium-ion battery stacking method is mainly "Z" type stacking. The stacking table moves left and right or the stacking table fixes the diaphragm to swing left and right. Both methods require the diaphragm to be folded repeatedly, and the first negative electrode unit sheet is placed on the first layer of diaphragm. The diaphragm then covers the first layer of negative electrode unit sheet from left to right before the first positive electrode unit sheet is placed. The diaphragm then covers the first layer of positive electrode unit sheet from right to left before the second negative electrode unit sheet is placed. This cycle is repeated until the last negative electrode sheet is stacked and the diaphragm is covered to form a single cell. After the single cell is completed, the stacking table is moved to the unloading position to take out the cell and then return to the stacking position to continue stacking the next cell. This stacking method has a waiting time when the positive and negative electrode units are alternately stacked, and there is also an auxiliary unloading time after the single cell is stacked, which affects the efficiency of the equipment. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provides a lithium-ion battery stacking device, wherein a rotating platform is provided, and a plurality of stacking tables are provided on the rotating platform, and the plurality of stacking tables can be stacked at the same time. When a handling manipulator goes to pick up materials, the rotating platform is rotated to the next stacking table to be placed, thereby effectively avoiding the waiting time when the positive and negative electrode unit sheets are alternately stacked, and the auxiliary time for unloading after the single battery cells are stacked.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a lithium-ion battery stacking device, including a positive electrode unit sheet handling robot, a negative electrode composite unit sheet handling robot and a conveying unit for conveying the positive electrode unit sheet and the negative electrode composite unit sheet, and also includes: a rotating platform and a stacking table placed on the rotating platform;

[0006] The rotating platform is used to rotate to the next stacking platform after the film is placed;

[0007] The positive electrode unit sheet handling robot and the negative electrode composite unit sheet handling robot are used to place the sheets simultaneously according to the set stacking table sequence.

[0008] Preferably, the conveying unit comprises a positive electrode unit sheet conveying unit and a negative electrode composite unit sheet conveying unit, which are respectively located on both sides of the rotating platform;

[0009] The positive electrode unit sheet conveying unit is used to convey positive electrode unit sheets, and the negative electrode composite unit sheet conveying unit is used to convey negative electrode composite unit sheets; based on this, the positive electrode unit sheets and the negative electrode composite unit sheets are conveyed simultaneously.

[0010] Preferably, the positive electrode unit sheet conveying unit and the negative electrode composite unit sheet conveying unit both use conveyor belts, which is a relatively common form of transmission.

[0011] Preferably, the device further comprises a winding and unwinding unit and a cutting unit;

[0012] The winding and unwinding unit is used for winding and unwinding positive electrode material rolls, negative electrode material rolls and separator material rolls;

[0013] The cutting unit is used to cut the unwound positive electrode material roll into positive electrode unit sheets, cut the unwound negative electrode material roll into negative electrode unit sheets, and cut the composite negative electrode composite unit into negative electrode composite unit sheets;

[0014] The unwinding unit and the cutting unit are arranged at the front end of the conveying unit.

[0015] Preferably, the unwinding unit comprises a negative electrode material unwinding reel, a positive electrode material unwinding reel, an upper diaphragm material unwinding reel and a lower diaphragm material unwinding reel, and the cutting unit comprises a positive electrode cutting knife, a negative electrode cutting knife and a composite unit sheet cutting knife;

[0016] The positive electrode material roll unwinding shaft is located at the front end of the positive electrode unit sheet conveying unit, and is used to unwind the positive electrode material roll; the positive electrode cutting knife is used to cut the unwound positive electrode material roll into positive electrode unit sheets;

[0017] The negative electrode material roll unwinding shaft, the upper diaphragm material roll unwinding shaft and the lower diaphragm material roll unwinding shaft are located at the front end of the negative electrode composite unit sheet conveying unit, and the negative electrode material roll unwinding shaft is used to unwind the negative electrode material roll; the negative electrode cutting knife is used to cut the unwound negative electrode material roll into negative electrode unit sheets;

[0018] The upper separator roll unwinding shaft and the lower separator roll unwinding shaft are respectively located at the upper and lower sides of the negative electrode unit sheet, and the upper separator roll unwinding shaft and the lower separator roll unwinding shaft respectively unwind the upper separator roll and the lower separator roll, and sequentially and intermittently composite with the negative electrode unit sheet via the composite roller to obtain a continuous negative electrode composite unit;

[0019] The composite unit sheet cutting knife is used to cut the continuous negative electrode composite unit to obtain negative electrode composite unit sheets.

[0020] Preferably, there are at least three stacking platforms, which are evenly arranged on the circumference of the rotating platform.

[0021] The number of the stacking stations is configured according to the situation; based on this, the device can stack multiple stacking stations at the same time to improve production efficiency.

[0022] Preferably, the stacking table is controlled by a servo motor, and each stacking table moves up and down according to the number of stacks, so that the handling robot places the sheets in a fixed position each time; the servo motor is used to achieve precise control of the up and down movement of the stacks.

[0023] Preferably, the device further comprises a positioning platform,

[0024] The positioning platform includes a positive electrode unit sheet positioning platform and a negative electrode composite unit sheet positioning platform, and the positive electrode unit sheet positioning platform and the negative electrode composite unit sheet positioning platform are located between the conveying unit and the rotating platform, so that the positive electrode unit sheet and the negative electrode composite unit sheet are positioned before lamination and then placed on the lamination table to achieve precise positioning.

[0025] The beneficial effects achieved by the utility model are:

[0026] The utility model provides a lithium-ion battery stacking device, which is provided with a rotating platform. A plurality of stacking tables are arranged on the rotating platform, and the plurality of stacking tables can be stacked at the same time. When a handling manipulator goes to pick up materials, the rotating platform is used to rotate to the next stacking table to be placed. This can effectively avoid the problem that when stacking positive electrode single sheets, the negative electrode composite single sheets need to wait until the positive electrode single sheets are stacked before being stacked, or when stacking negative electrode composite single sheets, the positive electrode single sheets need to wait until the negative electrode composite single sheets are stacked before being stacked. At the same time, the stacking table that has stacked the battery cells can be unloaded, and other stacking tables can continue to stack at the same time without waiting, thereby improving the production efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a top view of a lithium-ion battery stacking device provided by an embodiment of the utility model;

[0028] Figure 2 It is a schematic diagram of a rotating platform provided in an embodiment of the utility model;

[0029] Figure 3 It is a flow chart of a lithium-ion battery stacking method provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0031] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances. Example 1

[0033] This embodiment 1 provides a lithium-ion battery stacking device, which is used to rotate to the next stacking table when a handling robot picks up materials after placing the sheets. Multiple stacking tables work simultaneously and alternately, saving waiting time.

[0034] See also Figure 1 The device comprises: a rotating platform 23, at least three stacking platforms 24 arranged on the rotating platform 23, a conveying unit, a winding unit, a cutting unit and a positioning platform;

[0035] The conveying unit is used to convey the positive electrode unit sheet and the negative electrode composite unit sheet to both sides of the rotating platform;

[0036] The rotating platform is used to rotate to the next stacking platform after the film is placed;

[0037] The unwinding unit is used for unwinding positive electrode material rolls, negative electrode material rolls and separator material rolls;

[0038] The cutting unit is used to cut the unwound positive electrode material roll into positive electrode unit sheets, cut the unwound negative electrode material roll into negative electrode unit sheets, and cut the composite negative electrode composite unit into negative electrode composite unit sheets.

[0039] See also Figure 2In this embodiment, the stacking tables 24 are evenly arranged on the circumference of the rotating platform 23, and the number of stacking tables 24 can be configured according to the situation.

[0040] In this embodiment, the conveying unit includes a positive electrode unit sheet conveying unit 21 and a negative electrode composite unit sheet conveying unit 22, which are respectively located on both sides of the rotating platform; the positive electrode unit sheet conveying unit 21 is used to convey positive electrode units, and the negative electrode composite unit sheet conveying unit 22 is used to convey negative electrode composite units.

[0041] In this embodiment, the unwinding unit includes a negative electrode material unwinding reel 1, a positive electrode material unwinding reel 2, an upper separator material unwinding reel 3 and a lower separator material unwinding reel 4, and the cutting unit includes a positive electrode cutting knife 11, a negative electrode cutting knife 12 and a composite unit sheet cutting knife 13.

[0042] The positive electrode material roll unwinding shaft 2 is located at the front end of the positive electrode unit sheet conveying unit 21. The positive electrode material roll is unwound by the positive electrode material roll unwinding shaft 2, and then cut into positive electrode unit sheets 5 by the positive electrode cutting knife 11, and sent to the positive electrode unit sheet conveying unit 21.

[0043] The negative electrode material roll unwinding shaft 1, the upper diaphragm material roll unwinding shaft 3 and the lower diaphragm material roll unwinding shaft 4 are located at the front end of the negative electrode composite unit sheet conveying unit 22, the negative electrode material roll is unwound by the negative electrode material roll unwinding shaft 1, and then cut into negative electrode unit sheets by the negative electrode cutting knife 12, the upper diaphragm material roll unwinding shaft 3 and the lower diaphragm material roll unwinding shaft 4 are respectively located on the upper and lower sides of the negative electrode unit sheet, the upper diaphragm material roll and the lower diaphragm material roll are unwound by the upper diaphragm material roll unwinding shaft 3 and the lower diaphragm material roll unwinding shaft 4 respectively, and are compounded with the negative electrode unit sheet in sequence through the compounding roller 14 at intervals to obtain a continuous negative electrode composite unit, the continuous negative electrode composite unit is cut by the composite unit sheet cutting knife 13 to obtain a negative electrode composite unit sheet 6, and sent to the negative electrode composite unit sheet conveying unit 22.

[0044] In this embodiment, the cut positive electrode unit sheets and negative electrode composite unit sheets are transported to both sides of the rotating platform and transported to the stacking table on the rotating platform by two left and right transport robots. After the positive electrode unit sheets and negative electrode composite unit sheets are placed, the rotating platform starts to rotate a certain angle and then performs the next placement action until a lithium-ion battery stacked cell is obtained.

[0045] In this embodiment, each stacking station is controlled by a servo motor, and each stacking station moves up and down according to the number of stacked sheets, ensuring that the position of the sheet placement by the handling robot is fixed each time.

[0046] In one embodiment, the positive electrode unit sheet conveying unit and the negative electrode composite unit sheet conveying unit both use conveyor belts.

[0047] Furthermore, the positive electrode unit sheet and the negative electrode composite unit sheet are transported to the positive electrode unit sheet positioning platform and the negative electrode composite unit sheet positioning platform by the left and right transport manipulators to position the positive electrode unit sheet and the negative electrode composite unit sheet. Specifically, the positive electrode unit sheet positioning platform and the negative electrode composite unit sheet positioning platform are respectively located between the positive and negative electrode unit conveyor belts and the rotating platform. Example 2

[0048] Based on the lithium ion battery stacking device provided in the above embodiment 1, this embodiment 2 provides a lithium ion battery stacking method, see Figure 3 , the method comprising:

[0049] by Figure 2 Taking the four stacking stations shown as an example, they are stacking station one, stacking station two, stacking station three and stacking station four in clockwise order;

[0050] The positive electrode unit sheet and the negative electrode composite unit sheet are transported to both sides of the rotating platform by the transport unit, and the negative electrode composite unit sheet is transported to the stacking table 1 on the rotating platform by the transport robot;

[0051] The rotating platform rotates, and the transport robot goes to pick up the material; in this embodiment, it rotates clockwise;

[0052] The negative electrode composite unit sheet is transported by the transport robot to the stacking platform 2 on the rotating platform, and the positive electrode unit sheet is transported by the transport robot to the stacking platform 1 on the rotating platform;

[0053] The rotating platform rotates, and the transport robot goes to pick up the material;

[0054] The negative electrode composite unit sheet is transported by the transport robot to the stacking station 3 on the rotating platform, and the positive electrode unit sheet is transported by the transport robot to the stacking station 2 on the rotating platform;

[0055] The rotating platform rotates, and the transport robot goes to pick up the material;

[0056] The negative electrode composite unit sheet is transported by the transport robot to the stacking station 4 on the rotating platform, and the positive electrode unit sheet is transported by the transport robot to the stacking station 3 on the rotating platform;

[0057] The rotating platform rotates, and the transport robot goes to pick up the material;

[0058] The negative electrode composite unit sheet is transported by the transport robot to the stacking platform 1 on the rotating platform, and the positive electrode unit sheet is transported by the transport robot to the stacking platform 4 on the rotating platform;

[0059] By analogy, the positive electrode unit cell handling robot and the negative electrode composite unit cell handling robot simultaneously place the cells according to the set stacking table sequence until a lithium-ion battery stacking cell is obtained.

[0060] Based on this, in this embodiment, four stacking tables can be stacked at the same time, and when the transport robot goes to pick up the material, the platform is rotated to the next stacking table to be placed, effectively avoiding the waiting time when the positive and negative unit sheets are alternately stacked.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A lithium-ion battery stacking device, comprising a positive electrode unit sheet handling robot, a negative electrode composite unit sheet handling robot, and a conveying unit for conveying positive electrode units and negative electrode composite units, characterized in that: It also includes: a rotating platform and a stacking platform placed on the rotating platform; The rotating platform is used to rotate to the next stacking platform after the film is placed; The positive electrode unit sheet handling robot and the negative electrode composite unit sheet handling robot are used to place the sheets simultaneously according to the set stacking table sequence.

2. A lithium-ion battery stacking device according to claim 1, characterized in that: The conveying unit includes a positive electrode unit sheet conveying unit and a negative electrode composite unit sheet conveying unit, which are respectively located on both sides of the rotating platform; The positive electrode unit sheet conveying unit is used to convey positive electrode unit sheets, and the negative electrode composite unit sheet conveying unit is used to convey negative electrode composite unit sheets.

3. A lithium-ion battery stacking device according to claim 2, characterized in that: The positive electrode unit sheet conveying unit and the negative electrode composite unit sheet conveying unit both use conveyor belts.

4. A lithium-ion battery stacking device according to claim 2, characterized in that: The device also includes a winding unit and a cutting unit; The winding and unwinding unit is used for winding and unwinding positive electrode material rolls, negative electrode material rolls and separator material rolls; The cutting unit is used to cut the unwound positive electrode material roll into positive electrode unit sheets, cut the unwound negative electrode material roll into negative electrode unit sheets, and cut the composite negative electrode composite unit into negative electrode composite unit sheets; The unwinding unit and the cutting unit are arranged at the front end of the conveying unit.

5. A lithium-ion battery stacking device according to claim 4, characterized in that: The unwinding unit includes a negative electrode material unwinding reel, a positive electrode material unwinding reel, an upper diaphragm material unwinding reel and a lower diaphragm material unwinding reel, and the cutting unit includes a positive electrode cutting knife, a negative electrode cutting knife and a composite unit sheet cutting knife; The positive electrode material roll unwinding shaft is located at the front end of the positive electrode unit sheet conveying unit, and is used to unwind the positive electrode material roll; the positive electrode cutting knife is used to cut the unwound positive electrode material roll into positive electrode unit sheets; The negative electrode material roll unwinding shaft, the upper diaphragm material roll unwinding shaft and the lower diaphragm material roll unwinding shaft are located at the front end of the negative electrode composite unit sheet conveying unit, and the negative electrode material roll unwinding shaft is used to unwind the negative electrode material roll; the negative electrode cutting knife is used to cut the unwound negative electrode material roll into negative electrode unit sheets; The upper separator roll unwinding shaft and the lower separator roll unwinding shaft are respectively located at the upper and lower sides of the negative electrode unit sheet, and the upper separator roll unwinding shaft and the lower separator roll unwinding shaft respectively unwind the upper separator roll and the lower separator roll, and sequentially and intermittently composite with the negative electrode unit sheet via the composite roller to obtain a continuous negative electrode composite unit; The composite unit sheet cutting knife is used to cut the continuous negative electrode composite unit to obtain negative electrode composite unit sheets.

6. A lithium-ion battery stacking device according to claim 1, characterized in that: There are at least three stacking tables, which are evenly arranged on the circumference of the rotating platform. The number of the lamination stations is configured according to circumstances.

7. A lithium-ion battery stacking device according to claim 6, characterized in that: The stacking platform is controlled by a servo motor, and each stacking platform moves up and down according to the number of stacked sheets, so that the position of the sheet placement by the handling robot is fixed each time.

8. A lithium-ion battery stacking device according to claim 1, characterized in that: The device also includes a positioning platform, The positioning platform comprises a positive electrode unit sheet positioning platform and a negative electrode composite unit sheet positioning platform, and the positive electrode unit sheet positioning platform and the negative electrode composite unit sheet positioning platform are located between the conveying unit and the rotating platform.

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