Battery cell production system

Abstract

The utility model discloses a battery cell production system which comprises an unwinding device arranged at the bottom and comprising a positive pole piece unwinding roll and a negative pole piece unwinding roll; the double-sided coating module comprises a positive electrode double-sided coating die head and a negative electrode double-sided coating die head, the double-sided coating module is arranged above the unwinding device, the positive electrode piece unwinding roll and the positive electrode double-sided coating die head are correspondingly arranged, and the negative electrode piece unwinding roll and the negative electrode double-sided coating die head are correspondingly arranged; the two drying ovens are respectively arranged right above the double-sided coating modules; each rolling module comprises a positive electrode compression roller and a negative electrode compression roller, and the rolling modules are arranged above the drying oven; and the diaphragm unwinding device is arranged between the two groups of rolling modules and is used for placing a diaphragm between the positive pole piece and the negative pole piece. Through the vertical coating module and the vertical drying oven, the occupied space is smaller, the layout of a production line can be more compact and efficient, and the production cost of the battery is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cores, and in particular to a battery core production system. Background Art

[0002] With the development of the new energy industry, in the exploration of different battery process formulas, a large amount of factory buildings and funds need to be invested to establish experimental lines. In addition, a large amount of space is needed to cope with the production and transportation of various links of the battery during the process exploration, which requires more production costs and production time. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a battery cell production system, which occupies a smaller space through a vertical coating module and a vertical oven, can make the layout of the production line more compact and efficient, and reduce the production cost of the battery.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A battery cell production system comprises: a reeling device, the reeling device is arranged at the bottom, the reeling device comprises a positive electrode sheet reeling roll and a negative electrode sheet reeling roll, and is used for feeding the electrode sheet substrate; a double-sided coating module, the double-sided coating module comprises a positive electrode double-sided coating die head and a negative electrode double-sided coating die head, the double-sided coating module is arranged above the reeling device, the positive electrode sheet reeling roll is arranged corresponding to the positive electrode double-sided coating die head, the positive electrode double-sided coating die head is provided with a positive electrode coating, the negative electrode sheet reeling roll and the negative electrode double-sided coating die head are arranged corresponding to each other, the positive electrode double-sided coating die head is provided with a positive electrode coating, and the negative electrode sheet reeling roll and the negative electrode double-sided coating die head are arranged corresponding to each other. The cloth die head is set accordingly, and the negative electrode double-sided coating die head is provided with negative electrode coating; two ovens, the ovens are respectively arranged directly above the double-sided coating module, and the positive electrode sheets and the negative electrode sheets are dried respectively; two groups of rolling modules, the rolling modules include positive electrode pressing rollers and negative electrode pressing rollers, the rolling modules are arranged above the ovens, and the positive electrode sheets and the negative electrode sheets are rolled respectively; a diaphragm unwinding device, the diaphragm unwinding device is arranged between the two groups of the rolling modules, and is used to place a diaphragm between the positive electrode sheets and the negative electrode sheets.

[0006] As a further improvement of the above technical solution, a pole ear trimming device is provided below the diaphragm unwinding device, and the pole ear trimming device is used to trim the pole piece and the pole ear.

[0007] As a further improvement of the above technical solution, a winding device is provided below the tab trimming device, and the winding device winds the positive electrode sheet, the separator and the negative electrode sheet to form a battery cell.

[0008] As a further improvement of the above technical solution, a conveyor belt is provided below the winding device, and the conveyor belt is used to transport the battery core.

[0009] As a further improvement of the above technical solution, a plurality of rollers are arranged between the unwinding device and the double-sided coating module, and the rollers are used to support and transmit the pole piece tape and change the tape direction. The forward direction of the pole piece is changed to a vertical direction through the rollers.

[0010] As a further improvement of the above technical solution, a roller is provided on both sides of the rolling die set.

[0011] As a further improvement of the above technical solution, the positive electrode pressing roller and the negative electrode pressing roller both include an upper pressing roller and a lower pressing roller, and the upper pressing roller and the lower pressing roller are vertically arranged.

[0012] As a further improvement of the above technical solution, the positive electrode sheet unwinding roll and the negative electrode sheet unwinding roll are arranged in a mirror image.

[0013] The beneficial effects of the utility model are: by vertically arranging the double-sided coating module and the oven, vertical coating and drying are formed, so that the coating agent is more evenly distributed on both sides of the pole piece. In addition, the vertical coating module and the oven occupy less space, which can make the layout of the production line more compact and efficient, and reduce the production cost of the battery. The orderly implementation of the steps of vertical coating, vertical drying, rolling, pole ear trimming and winding can reduce production time and cost and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is an assembly schematic diagram of the utility model.

[0016] Explanation of the reference numerals: 1-unwinding device; 11-positive electrode sheet unwinding roll; 12-negative electrode sheet unwinding roll; 2-double-sided coating module; 21-positive electrode double-sided coating die head; 22-negative electrode double-sided coating die head; 3-oven; 41-positive electrode pressure roller; 42-negative electrode pressure roller; 5-diaphragm unwinding device; 6-ear trimming device; 7-winding device; 8-conveyor belt; 9-roller. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the utility model, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that according to the specific implementation situation, a better connection structure can be formed by adding or reducing connection accessories. For example, fixed connection / fixed installation can be selected according to the needs of screw connection, bolt connection, pin connection, key connection, bonding, mortise and tenon connection, welding, riveting and other methods. For example, detachable connection can be selected according to the needs of screw connection, bolt connection, threaded connection, snap connection, mortise and tenon connection, Velcro connection and other methods. The various technical features in the creation of the utility model can be combined interactively without conflicting with each other.

[0018] Please refer to Figure 1 The embodiment of the utility model provides a battery cell production system, including: an unwinding device 1, a double-sided coating module 2, two ovens 3, two sets of rolling modules and a diaphragm unwinding device 5. The unwinding device 1 is used to load positive electrode sheets and negative electrode sheets respectively. The unwinding device 1 is arranged at the bottom of the overall system equipment to transport the electrode sheets into the equipment. Among them, the unwinding device 1 includes a positive electrode sheet unwinding roll 11 and a negative electrode sheet unwinding roll 12, and the positive electrode sheet unwinding roll 11 is arranged opposite to the negative electrode sheet unwinding roll 12, and the direction of conveying the electrode sheets is opposite in the horizontal direction.

[0019] The double-sided coating module 2 is used to simultaneously feed the two sides of the electrode sheet. The double-sided coating module 2 includes a positive double-sided coating die head 21 and a negative double-sided coating die head 22. The positive electrode sheet unwinding roll 11 is arranged correspondingly to the positive double-sided coating die head 21. The positive electrode sheet is fed from the positive electrode sheet unwinding roll 11 and passes through the positive double-sided coating die head 21. The positive double-sided coating die head 21 is provided with a positive electrode coating, and the two sides of the positive electrode sheet are fed. The negative electrode sheet unwinding roll 12 is arranged correspondingly to the negative double-sided coating die head 22. The negative electrode sheet is fed from the negative electrode sheet unwinding roll 12 and passes through the negative double-sided coating die head 22. The negative double-sided coating die head 22 is provided with a negative electrode coating, and the two sides of the negative electrode sheet are fed.

[0020] Furthermore, the double-sided coating module 2 is arranged above the unwinding device 1. After the unwinding device 1 loads the electrode, the electrode needs to be transported in the vertical direction after being transported horizontally to contact the double-sided coating module 2, thereby forming vertical coating. The battery electrode is coated in the vertical direction so that the coating agent is more evenly distributed on both sides of the electrode, and by vertically arranging the coating module, the space occupied by the overall equipment is smaller.

[0021] The oven 3 is used to dry the electrode after coating. The oven 3 is respectively arranged above the double-sided coating module 2. The electrode after coating directly enters the oven 3 upward in the vertical direction. The oven 3 is provided with two, respectively drying the positive electrode and the negative electrode. The electrode enters the oven 3 in a vertical mode, so that the double-sided coating is evenly dried, and the vertical oven 3 occupies less space, which can make the layout of the production line more compact and efficient.

[0022] The rolling module is used to roll the electrode sheet to compact the coating so that it can be better combined with the electrode sheet surface. The rolling module is arranged above the oven 3, and the rolling module includes a positive electrode roller 41 and a negative electrode roller 42, which correspond to two ovens 3 respectively, and roll the dried positive electrode sheet and negative electrode sheet respectively.

[0023] The diaphragm unwinding device 5 is arranged between the two groups of the rolling modules and is used to place the diaphragm between the positive electrode sheet and the negative electrode sheet. After rolling, the positive electrode sheet and the negative electrode sheet are transported relatively toward the middle direction, and the diaphragm unwinding device 5 places the diaphragm between the positive electrode sheet and the negative electrode sheet to facilitate subsequent joint winding to form a battery cell.

[0024] The battery cell production system forms vertical coating and drying by vertically arranging the double-sided coating module 2 and the oven 3, which makes the coating agent more evenly distributed on both sides of the electrode. In addition, the vertical coating module and the vertical oven occupy less space, which can make the layout of the production line more compact and efficient, and reduce the production cost of the battery.

[0025] Please continue to refer to Figure 1 A tab trimming device 6 is provided below the separator unwinding device 5, and the tab trimming device 6 is used to trim the tabs of the pole pieces. After the positive pole piece and the negative pole piece are rolled in the horizontal direction and the separator is added between them, they are transported downward in the vertical direction and trimmed by the tab trimming device 6 below.

[0026] Furthermore, a winding device 7 is provided below the tab trimming device 6, and the winding device 7 winds the positive electrode sheet, the separator and the negative electrode sheet to form a battery cell. The positive electrode sheets and the negative electrode sheets are alternately stacked and wound together, and the positive and negative electrodes are separated by a separator, wherein the positive electrode sheets, the negative electrode sheets and the separator are arranged alternately to form the basic structure of the battery cell.

[0027] A conveyor belt 8 is provided below the winding device 7 for conveying the battery cell. After the battery cell is wound by the winding device 7, it is cut and placed on the conveyor belt 8 to be transported to the next processing station.

[0028] In order to complete the vertical and horizontal changes of the electrode during the transportation process, a plurality of rollers 9 are provided in the battery cell production system. The rollers are used to support the transmission of the electrode tape and change the tape direction, and to guide the electrode path and assist the electrode to change direction. Among them, a plurality of rollers 9 are provided between the unwinding device 1 and the double-sided coating module 2. When the electrode is fed by the unwinding device 1, it passes through the rollers 9 in the horizontal direction. The rollers 9 can help the electrode to be flattened before coating and reduce wrinkles while guiding the path of the electrode. Moreover, guided by the rollers 9, the forward direction of the electrode passes through the rollers 9 and is changed to a vertical direction before entering the double-sided coating module 2, so as to facilitate vertical upward movement for coating.

[0029] Furthermore, a roller 9 is provided on both sides of the rolling module to change the forward direction of the pole piece, and the pole piece advances in the horizontal direction during the rolling process. The positive pole roller 41 and the negative pole roller 42 both include an upper roller and a lower roller, and the upper roller and the lower roller are arranged vertically. After the pole piece is vertically dried, the forward direction changes from vertical to horizontal, and enters between the upper roller and the lower roller, which facilitates the roller to roll. The pole piece is rolled by the rollers arranged up and down to ensure the compaction effect of the coating on the pole piece.

[0030] In the present battery cell production system, the positive electrode sheet is fed into the equipment by the positive electrode sheet unwinding roll 11 of the unwinding device 1, and the forward direction is changed to vertical upward movement through a number of rollers 9, and the positive electrode coating is applied by the positive electrode double-sided coating die head 21 through the double-sided coating module 2, and then dried through the oven 3. After drying, the sheet passes through the roller 9 on one side of the roller 9 pressing module, and the sheet moves horizontally into the roller pressing module. After being pressed by the roller 9, it enters the tab trimming device 6 below through the roller 9 on the other side, and the tab is trimmed, and then enters the winding device 7, and is wound with the separator and the negative electrode sheet to form a battery cell.

[0031] The positive electrode sheet unwinding roll 11 and the negative electrode sheet unwinding roll 12 are arranged in a mirror image, and the negative electrode sheet is opposite to the forward direction of the positive electrode sheet in the horizontal direction, and the rest of the path is consistent with the positive electrode sheet. The negative electrode sheet is also vertically coated and dried, and then the tab is trimmed before being wound with the separator and the positive electrode sheet to form a battery cell.

[0032] The battery cell production system forms vertical coating and drying by vertically arranging the double-sided coating module 2 and the oven 3, which makes the coating agent more evenly distributed on both sides of the pole piece. In addition, the vertical coating module and the oven 3 occupy less space, which can make the layout of the production line more compact and efficient, and reduce the production cost of the battery. The orderly implementation of the steps of vertical coating, vertical drying, rolling, pole ear trimming and winding can reduce production time and cost and improve production efficiency.

[0033] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A battery cell production system, characterized in that: include: An unwinding device, the unwinding device comprising a positive electrode sheet unwinding roll and a negative electrode sheet unwinding roll, used for loading the electrode sheet substrate; A double-sided coating module, the double-sided coating module includes a positive electrode double-sided coating die head and a negative electrode double-sided coating die head, the double-sided coating module is arranged above the unwinding device, the positive electrode sheet unwinding roll is arranged corresponding to the positive electrode double-sided coating die head, the positive electrode double-sided coating die head is provided with positive electrode coating, the negative electrode sheet unwinding roll is arranged corresponding to the negative electrode double-sided coating die head, the negative electrode double-sided coating die head is provided with negative electrode coating; Two ovens, the two ovens are respectively arranged directly above the double-sided coating module, and are used to dry the positive electrode sheet and the negative electrode sheet; Two rolling dies, the two rolling dies are arranged above the oven, and are used to roll the positive electrode sheet and the negative electrode sheet, and the rolling dies include a positive electrode roller and a negative electrode roller; The diaphragm unwinding device is arranged between the two groups of the rolling dies and is used to place the diaphragm between the positive electrode sheet and the negative electrode sheet.

2. The battery cell production system according to claim 1, characterized in that: A pole ear trimming device is provided below the diaphragm unwinding device, and the pole ear trimming device is used to trim the pole piece and the pole ear.

3. The battery cell production system according to claim 2, characterized in that: A winding device is provided below the tab trimming device, and the winding device is used to wind the positive electrode sheet, the separator and the negative electrode sheet to form a battery cell.

4. The battery cell production system according to claim 3, characterized in that: A conveyor belt is provided below the winding device, and the conveyor belt is used to convey the battery core.

5. The battery cell production system according to claim 1, characterized in that: A plurality of rollers are arranged between the unwinding device and the double-sided coating module, and the rollers are used for supporting and transmitting the pole piece tape and changing the tape direction.

6. The battery cell production system according to claim 5, characterized in that: A roller is provided on both sides of the rolling die set.

7. The battery cell production system according to claim 6, characterized in that: The positive electrode pressing roller and the negative electrode pressing roller both include an upper pressing roller and a lower pressing roller, and the upper pressing roller and the lower pressing roller are vertically arranged.

8. The battery cell production system according to claim 1, characterized in that: The positive electrode sheet unwinding roll and the negative electrode sheet unwinding roll are arranged in a mirror image.

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