Method and device for preparing solid-state battery pole piece and solid-state battery through multi-layer stacking based on microenvironment

Abstract

The invention discloses a method and a device for preparing a solid-state battery pole piece and a solid-state battery by multilayer stacking based on a microenvironment, the device comprises a production unit module and a microenvironment control unit module, the production unit module takes a current collector as a carrier, and the current collector is arranged on the surface of the current collector under the microenvironment provided by the microenvironment control unit module. A plurality of solid-state battery pole pieces are stacked in series, in parallel and the like to prepare the solid-state battery. The production unit module and the microenvironment control unit module are arranged in a plurality of containers, the containers are communicated through pipelines, the production and preparation of the solid-state battery are carried out in a closed microenvironment, and the technical effects of low production cost and high efficiency of the solid-state battery are achieved.

Description

Technical Field

[0001] This invention relates to a method and apparatus for preparing solid-state battery electrodes and solid-state batteries based on multilayer stacking in a microenvironment, belonging to the field of solid-state battery production technology. Background Technology

[0002] Current solid-state battery manufacturing processes generally employ a discrete roll-to-roll process. First, positive electrode rolls, negative electrode rolls, and solid electrolyte film rolls are prepared separately. Then, these independent positive electrode layers, negative electrode layers, and solid electrolyte film layers are stacked and composited to fabricate the solid-state battery. Furthermore, the preparation of the positive electrode rolls, negative electrode rolls, and solid electrolyte film rolls, as well as the stacking and composite processes, all require pre-established cleanrooms within a factory. This discrete solid-state battery manufacturing method and equipment, based on a non-enclosed macro-environment, suffers from high production costs and low efficiency. Summary of the Invention

[0003] To address the aforementioned issues, this invention provides a method and apparatus for fabricating solid-state battery electrodes and solid-state batteries through multi-layer stacking based on a microenvironment. The method includes a production unit module and a microenvironment control unit module. In the microenvironment provided by the microenvironment control unit module, the production unit module fabricates solid-state battery electrodes and solid-state batteries by multi-layer stacking using current collectors as carriers.

[0004] The production unit module includes a powder preparation device, a powder conveying device, a powder coating device, a multi-roller pressing device, a die-cutting device, a stacking device, a welding device, and a packaging device.

[0005] The aforementioned production unit module refers to modularizing the production unit and setting it inside multiple container boxes.

[0006] The containers of the production unit modules are connected by pipes.

[0007] The containers of the production unit modules are connected by pipelines for continuous closed-loop production.

[0008] The production unit module includes a preparation unit module and a material supply unit module.

[0009] The feeding unit module includes a powder preparation device and a powder conveying device.

[0010] The preparation unit module includes a powder coating device, a rolling device, a die-cutting device, a stacking device, a welding device, and a packaging device.

[0011] The microenvironment control unit module includes environmental control and regulation devices such as a dust control device, a temperature and humidity control device, and a gas detection device.

[0012] The aforementioned microenvironment control unit module refers to modularizing the environmental control and regulation device and setting it inside multiple container boxes.

[0013] The container of the microenvironment control unit module is connected to the container of the production unit module via a pipeline.

[0014] The microenvironment is provided to the production unit module by the microenvironment control unit module through pipelines.

[0015] The production unit module 1 and the microenvironment control unit module 2 are set inside multiple containers. The containers refer to shells with the same or similar size specifications as 20-foot and 40-foot containers. The containers are equipped with work windows, work gloves, and work doors 53, etc.

[0016] The aforementioned multilayer stacking for solid-state battery electrode fabrication refers to the process of sequentially fabricating an electrode layer and a solid electrolyte layer on the surface of a current collector, using a current collector as a carrier.

[0017] The aforementioned multi-layer stacking method for preparing solid-state battery electrodes involves a microenvironment control unit module providing the microenvironment required for preparation, a material supply unit module providing the powder required for preparation, and a preparation unit module preparing each layer of the electrode.

[0018] The multi-layer stacking process for preparing solid-state battery electrodes involves adjusting the number of layers in the stacked electrode to correspond to the addition or removal of a microenvironment control unit module, a material supply unit module, and a preparation unit module.

[0019] The solid-state battery electrode includes a current collector front and back surface, and has a positive electrode layer and a positive electrode side solid electrolyte layer corresponding to the positive electrode.

[0020] The solid-state battery electrode includes a current collector front and back surface, a negative electrode layer and a corresponding negative electrode side solid electrolyte layer.

[0021] The solid-state battery electrode includes a current collector front surface, which has a positive electrode layer and a positive electrode side solid electrolyte layer corresponding to the positive electrode, and a current collector back surface, which has a negative electrode layer and a negative electrode side solid electrolyte layer corresponding to the negative electrode.

[0022] The process involves sequentially preparing an electrode layer and a solid electrolyte layer on the surface of the current collector, including one electrode layer or multiple electrode layers.

[0023] The method of sequentially preparing an electrode layer and a solid electrolyte layer on the surface of a current collector includes preparing a first electrode layer on the surface of the current collector using the current collector as a carrier, and then preparing a solid electrolyte layer corresponding to the electrode on the surface of the first electrode layer.

[0024] The method of sequentially preparing an electrode layer and a solid electrolyte layer on the surface of a current collector includes: using the current collector as a carrier, preparing a first electrode layer on the surface of the current collector; then preparing a second electrode layer on the surface of the first electrode layer; then preparing a third electrode layer on the surface of the second electrode layer; and finally preparing a solid electrolyte layer corresponding to the electrode on the surface of the third electrode layer.

[0025] The solid-state battery is fabricated by stacking multiple solid-state battery electrodes in series and parallel configurations. Depending on the required output voltage, such as 4.5V, 48V, or 800V, the multiple solid-state battery electrodes are stacked in parallel and series configurations.

[0026] The current collectors include copper foil current collectors, aluminum foil current collectors, composite current collectors, etc.

[0027] The solid electrolytes mentioned include solid electrolytes such as sulfides, halides, and oxides.

[0028] The positive electrode includes lithium-rich manganese-based positive electrodes, high-nickel ternary positive electrodes, etc.

[0029] The negative electrode includes silicon-carbon negative electrode, lithium metal negative electrode, lithium alloy negative electrode, etc.

[0030] The negative electrode layer includes either a self-generated negative electrode layer or no negative electrode layer.

[0031] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 Appendix Figure 7 Appendix Figure 8 Appendix Figure 9 As shown,

[0032] Figure 1 A schematic diagram of a fully enclosed, multi-layer stacked apparatus for fabricating solid-state battery electrodes and solid-state batteries.

[0033] Figure 2 A schematic diagram of a single positive electrode sheet stacked in multiple layers.

[0034] Figure 3 A schematic diagram of a single negative electrode sheet stacked in multiple layers.

[0035] Figure 4 A schematic diagram of multiple layers of positive and negative electrode plates stacked together.

[0036] Figure 5 Schematic diagram of a multi-layer stack of dual positive electrode plates.

[0037] Figure 6 A schematic diagram of a multi-layer stack of dual negative electrode plates.

[0038] Figure 7 A schematic diagram of a fully parallel solid-state battery stack.

[0039] Figure 8 A schematic diagram of a fully series solid-state battery stack.

[0040] Figure 9 A schematic diagram of a series-parallel solid-state battery stack.

[0041] The positive electrode layer has 4 layers and the negative electrode layer has 3 layers, further explained. A method and apparatus for preparing solid-state battery electrodes and solid-state batteries based on multilayer stacking in a microenvironment includes a production unit module 1 and a microenvironment control unit module 2. In the microenvironment provided by the microenvironment control unit module 2, the production unit module 1 prepares solid-state battery electrodes and solid-state batteries by multilayer stacking using a current collector 7 as a carrier.

[0042] As attached Figure 1 The diagram shows a schematic of an apparatus for fabricating solid-state battery electrodes and solid-state batteries using a multi-layer stacking method based on a microenvironment. The apparatus comprises a production unit module 1 and a microenvironment control unit module 2. The production unit module 1 is constructed from a fabrication unit module 3 and a material supply unit module 4. The production unit module 1 and the microenvironment control unit module 2 are housed within multiple containers 5. Continuous production is achieved between the fabrication unit module 3 and its container 5 via a connecting pipe A6. Material supply is achieved between the material supply unit module 4 and the fabrication unit module 3's container 5 via a connecting pipe B61. Microenvironment control unit module 2's container 5 is connected to both the fabrication unit module 3 and the material supply unit module 4's container 5 via a connecting pipe C62 for microenvironmental control.

[0043] The preparation unit module 3 of the production unit module 1 includes a positive electrode preparation unit module 31, a negative electrode preparation unit module 32, a die-cutting preparation unit module 33, a stacking preparation unit module 34, and a packaging preparation unit module 35.

[0044] The apparatus of the preparation unit module 3 of the production unit module 1 includes a powder coating device, a rolling device, a die-cutting device, a stacking device, a welding device, and a packaging device.

[0045] The positive electrode preparation unit module 31 includes a positive electrode first layer preparation unit module 311, a positive electrode second layer preparation unit module 312, a positive electrode third layer preparation unit module 313, and a positive electrode solid electrolyte layer preparation unit module 314.

[0046] The negative electrode preparation unit module 32 includes a negative electrode first layer preparation unit module 321, a negative electrode second layer preparation unit module 322, and a negative electrode solid electrolyte layer preparation unit module 323.

[0047] Production unit module 1's feeding unit module 4 includes: a positive electrode feeding unit module 41, a positive electrode first layer feeding unit module 411, a positive electrode second layer feeding unit module 412, a positive electrode third layer feeding unit module 413, and a positive electrode solid electrolyte layer feeding unit module 414; a negative electrode feeding unit module 42, a negative electrode first layer feeding unit module 421, a negative electrode second layer feeding unit module 422, and a negative electrode solid electrolyte layer feeding unit module 423.

[0048] Production unit module 1 and microenvironment control unit module 2 are set inside multiple containers 5. Container 5 refers to a shell with the same or similar size specifications as 20-foot and 40-foot containers. Container 5 is equipped with devices such as work windows 51, work gloves 52, and work doors 53.

[0049] The four layers of the positive electrode are stacked sequentially with current collectors as the carrier.

[0050] The positive electrode uses a current collector as a carrier. A first positive electrode layer is prepared on the surface of the current collector. Then, a second positive electrode layer is prepared on the surface of the first electrode layer. Then, a third positive electrode layer is prepared on the surface of the second electrode layer. Finally, a solid electrolyte layer corresponding to the positive electrode is prepared on the surface of the third electrode layer.

[0051] The three layers of the negative electrode are stacked sequentially with current collectors as the carrier.

[0052] The negative electrode uses a current collector as a carrier. A first negative electrode layer is prepared on the surface of the current collector. Then, a second negative electrode layer is prepared on the surface of this first electrode layer. Finally, a solid electrolyte layer corresponding to the negative electrode is prepared on the surface of the second negative electrode layer.

[0053] Solid-state battery electrodes are fabricated by multi-layer stacking. The number of layers in the stacked electrodes is increased or decreased, and the corresponding microenvironment control unit module, material supply unit module, and preparation unit module are added or removed accordingly.

[0054] As attached Figure 2As shown in the schematic diagram of a single positive electrode multilayer stack, the solid battery electrode 81 is stacked in multiple layers on one surface of the current collector 7 as the carrier, including 3 positive electrode layers and one positive electrode side solid electrolyte layer.

[0055] As attached Figure 3 The diagram shows a multi-layer stacked solid-state battery electrode 82, with the current collector 7 as the carrier, and multiple layers stacked on one surface of the current collector's front and back surfaces. It includes two negative electrode layers and one negative electrode-side solid electrolyte layer.

[0056] As attached Figure 4 As shown in the schematic diagram of the multi-layer stacked positive and negative electrode sheets, the solid-state battery electrode sheets 83 are stacked in multiple layers on the positive and negative surfaces of the current collector 7 as the carrier. The positive surface includes 3 positive electrode layers and 1 positive electrode side solid electrolyte layer, and the negative surface includes 2 negative electrode layers and 1 negative electrode side solid electrolyte layer.

[0057] As attached Figure 5 As shown in the schematic diagram of the multi-layer stacked dual positive electrode, the solid battery electrode 84 is stacked in multiple layers on the front and back surfaces of the current collector 7 as the carrier. The front surface includes 3 positive electrode layers and 1 positive electrode side solid electrolyte layer, and the back surface includes 3 positive electrode layers and 1 positive electrode side solid electrolyte layer.

[0058] As attached Figure 6 As shown in the schematic diagram of the multi-layer stacked dual negative electrode, the solid battery electrode 85 is stacked in multiple layers on the front and back surfaces of the current collector 7 as the carrier. The front surface includes two negative electrode layers and one negative electrode side solid electrolyte layer, and the back surface includes two negative electrode layers and one negative electrode side solid electrolyte layer.

[0059] As attached Figure 7 As shown in the diagram, the fully parallel solid-state battery 91 is constructed by stacking a single positive electrode 81, two negative electrode 85, two positive electrode 84, and a single negative electrode 82.

[0060] As attached Figure 8 As shown in the diagram, the fully series solid-state battery 92 is constructed by stacking a single positive electrode 81, a positive electrode 83, and a single negative electrode 82.

[0061] As attached Figure 9 As shown in the diagram, the series-parallel solid-state battery stack is constructed by combining and stacking a single positive electrode 81, a positive and a negative electrode 83, a double positive electrode 84, a double negative electrode 85, and a single negative electrode 82.

[0062] Beneficial effects: The present invention provides a method and apparatus for preparing solid-state battery electrodes and solid-state batteries by multi-layer stacking based on a microenvironment. The apparatus includes a production unit module and a microenvironment control unit module, which are set in multiple containers. The production unit module prepares solid-state battery electrodes and solid-state batteries by multi-layer stacking in the microenvironment provided by the microenvironment control unit module, using current collectors as carriers. This achieves the technical effect of low production cost and high efficiency of solid-state batteries. Attached Figure Description

[0063] Figure 1 This is a schematic diagram of an apparatus for fabricating solid-state battery electrodes and solid-state batteries through multilayer stacking based on a microenvironment.

[0064] Figure 2 This is a schematic diagram of a single positive electrode sheet stacked in multiple layers.

[0065] Figure 3 This is a schematic diagram of a single negative electrode sheet stacked in multiple layers.

[0066] Figure 4 This is a schematic diagram of multiple layers of positive and negative electrode plates stacked together.

[0067] Figure 5 This is a schematic diagram of a multi-layer stack of dual positive electrode plates.

[0068] Figure 6 This is a schematic diagram of a multi-layer stack of dual negative electrode plates.

[0069] Figure 7 This is a schematic diagram of a fully parallel solid-state battery stack.

[0070] Figure 8 This is a schematic diagram of a fully series solid-state battery stack.

[0071] Figure 9 This is a schematic diagram of a series-parallel solid-state battery stack.

[0072] In the diagram: 1-Production unit module, 2-Microenvironment control unit module, 3-Preparation unit module, 31-Positive electrode preparation unit module, 311-Positive electrode first layer preparation unit module, 312-Positive electrode second layer preparation unit module, 313-Positive electrode third layer preparation unit module, 314-Positive electrode side solid electrolyte layer preparation unit module, 32-Negative electrode preparation unit module, 321-Negative electrode first layer preparation unit module, 322-Negative electrode second layer preparation unit module, 323-Negative electrode side solid electrolyte layer preparation unit module, 33-Die-cutting preparation unit module, 34-Layering preparation unit module, 35-Encapsulation preparation unit module, 4-Feeding unit module, 41-Positive electrode feeding unit module, 411-Positive electrode first layer feeding unit module Modules: 412-Positive electrode sheet second layer feeding unit module, 413-Positive electrode sheet third layer feeding unit module, 414-Positive electrode sheet positive side solid electrolyte layer feeding unit module, 42-Negative electrode sheet feeding unit module, 421-Negative electrode sheet first layer feeding unit module, 422-Negative electrode sheet second layer feeding unit module, 423-Negative electrode sheet negative side solid electrolyte layer feeding unit module, 5-Container, 51-Working window, 52-Working gloves, 53-Working door, 6-Pipeline A, 61-Pipeline B, 62-Pipeline C, 7-Current collector, 81-Single positive electrode sheet, 82-Single negative electrode sheet, 83-Positive and negative electrode sheets, 84-Dual positive electrode sheet, 85-Dual negative electrode sheet, 91-Fully parallel solid-state battery, 92-Fully series solid-state battery, 93-Series and parallel solid-state battery. Detailed Implementation

[0073] Example 1: A method and apparatus for fabricating solid-state battery electrodes and solid-state batteries based on multilayer stacking in a microenvironment.

[0074] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 Appendix Figure 7 Appendix Figure 8 Appendix Figure 9 As shown, the positive electrode has 4 layers and the negative electrode has 3 layers.

[0075] An apparatus for fabricating solid-state battery electrodes and solid-state batteries based on multilayer stacking in a microenvironment comprises a production unit module 1 and a microenvironment control unit module 2, both housed within multiple containers 5. The production unit module 1 is further composed of a preparation unit module 3 and a feeding unit module 4. Continuous production is achieved between the preparation unit module 3 and its container 5 via a connecting pipe A6. Feeding is achieved between the feeding unit module 4 and the container 5 of the preparation unit module 3 via a connecting pipe B61. Microenvironment control unit module 2's container 5 is connected to the container 5 of the production unit module 1 via a connecting pipe C62 for microenvironmental control.

[0076] The fabrication unit module 3 of the production unit module includes: negative electrode fabrication unit module 31, positive electrode fabrication unit module 32, die-cutting fabrication unit module 33, stacking fabrication unit module 34, and packaging fabrication unit module 35, etc.

[0077] The apparatus for preparing unit module 3 includes a powder coating device, a multi-roller pressing device, a die-cutting device, a stacking device, a welding device, and a packaging device.

[0078] The positive electrode preparation unit module 31 includes a positive electrode first layer preparation unit module 311, a positive electrode second layer preparation unit module 312, a positive electrode third layer preparation unit module 313, and a positive electrode side solid electrolyte layer preparation unit module 314.

[0079] The negative electrode preparation unit module 32 includes a negative electrode first layer preparation unit module 321, a negative electrode second layer preparation unit module 322, and a negative electrode side solid electrolyte layer preparation unit module 323.

[0080] The feeding unit module 4 includes: a positive electrode feeding unit module 41, a positive electrode first layer feeding unit module 411, a positive electrode second layer feeding unit module 412, a positive electrode third layer feeding unit module 413, a positive electrode side solid electrolyte layer feeding unit module 414, a negative electrode feeding unit module 42, a negative electrode first layer feeding unit module 421, a negative electrode second layer feeding unit module 422, and a negative electrode side solid electrolyte layer feeding unit module 423.

[0081] Production unit module 1 and microenvironment control unit module 2 are set inside multiple containers 5. Container 5 refers to a shell with the same size and specifications as a 20-foot container. Container 5 is equipped with devices such as work windows 51, work gloves 52, and work doors 53.

[0082] The method for preparing solid-state battery electrodes and solid-state batteries by multi-layer stacking is to use current collector 7 as a carrier, positive electrode preparation unit module 31, which prepares positive electrode by stacking 4 layers, negative electrode preparation unit module 32, which prepares negative electrode by stacking 3 layers, and multiple positive and negative electrode sheets are stacked in series and parallel to prepare solid-state batteries.

[0083] The positive electrode uses a current collector as a carrier. A first positive electrode layer is prepared on the surface of the current collector. Then, a second positive electrode layer is prepared on the surface of the first electrode layer. Then, a third positive electrode layer is prepared on the surface of the second electrode layer. Finally, a solid electrolyte layer corresponding to the positive electrode is prepared on the surface of the third electrode layer.

[0084] The negative electrode uses a current collector as a carrier. A first negative electrode layer is prepared on the surface of the current collector. Then, a second negative electrode layer is prepared on the surface of this first electrode layer. Finally, a solid electrolyte layer corresponding to the negative electrode is prepared on the surface of the second negative electrode layer.

[0085] As attached Figure 2 As shown in the schematic diagram of a single positive electrode multilayer stack, the solid battery electrode 81 is stacked in multiple layers on one surface of the current collector 7 as the carrier, including 3 positive electrode layers and one positive electrode side solid electrolyte layer.

[0086] As attached Figure 3 The diagram shows a multi-layer stacked solid-state battery electrode 82, with the current collector 7 as the carrier, and multiple layers stacked on one surface of the current collector's front and back surfaces. It includes two negative electrode layers and one negative electrode-side solid electrolyte layer.

[0087] As attached Figure 4 As shown in the schematic diagram of the multi-layer stacked positive and negative electrode sheets, the solid-state battery electrode sheets 83 are stacked in multiple layers on the positive and negative surfaces of the current collector 7 as the carrier. The positive surface includes 3 positive electrode layers and 1 positive electrode side solid electrolyte layer, and the negative surface includes 2 negative electrode layers and 1 negative electrode side solid electrolyte layer.

[0088] As attached Figure 5 As shown in the schematic diagram of the multi-layer stacked dual positive electrode, the solid battery electrode 84 is stacked in multiple layers on the front and back surfaces of the current collector 7 as the carrier. The front surface includes 3 positive electrode layers and 1 positive electrode side solid electrolyte layer, and the back surface includes 3 positive electrode layers and 1 positive electrode side solid electrolyte layer.

[0089] As attached Figure 6As shown in the schematic diagram of the multi-layer stacked dual negative electrode, the solid battery electrode 85 is stacked in multiple layers on the front and back surfaces of the current collector 7 as the carrier. The front surface includes two negative electrode layers and one negative electrode side solid electrolyte layer, and the back surface includes two negative electrode layers and one negative electrode side solid electrolyte layer.

[0090] As attached Figure 7 As shown in the diagram, the fully parallel solid-state battery 91 is constructed by stacking a single positive electrode 81, two negative electrode 85, two positive electrode 84, and a single negative electrode 82.

[0091] As attached Figure 8 As shown in the diagram, the fully series solid-state battery 92 is constructed by stacking a single positive electrode 81, a positive electrode 83, and a single negative electrode 82.

[0092] As attached Figure 9 As shown in the diagram, the series-parallel solid-state battery stack is constructed by combining and stacking a single positive electrode 81, a positive and a negative electrode 83, a double positive electrode 84, a double negative electrode 85, and a single negative electrode 82.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method and device for preparing solid-state battery electrode sheet and solid-state battery based on micro-environmental multilayer stacking, characterized in that, It comprises a production unit module and a micro-environment control unit module, and the production unit module is prepared under the micro-environment provided by the micro-environment control unit module.

2. The production unit module of claim 1, comprising a powder preparation device, a powder conveying device, a powder coating device, a rolling device, a die cutting device, a laminating device, a welding device, an encapsulation device, etc.

3. The micro-environment control unit module of claim 1, comprising a dust control device, a temperature and humidity control device, a gas detection device, and other environmental control and adjustment devices.

4. The production unit module and the micro-environment control unit module of claim 1 are arranged in multiple containers, and the containers are connected by pipelines.

5. The multilayer stacking preparation of the solid-state battery electrode sheet of claim 1 refers to the current collector as the carrier, and the electrode sheet layer and the solid-state electrolyte layer are prepared on the surface of the current collector.

6. The multilayer stacking preparation of the solid-state battery electrode sheet of claim 1 refers to stacking 2 layers and more than 2 layers.

7. The solid-state battery electrode sheet of claim 1 comprises a positive electrode sheet layer and a positive electrode side solid-state electrolyte layer.

8. The solid-state battery electrode sheet of claim 1 comprises a negative electrode sheet layer and a negative electrode side solid-state electrolyte layer.

9. The solid-state battery electrode sheet of claim 1 comprises a self-generated negative electrode sheet layer and a solid-state electrolyte layer.

10. The solid-state battery of claim 1 is constructed by combining and stacking multiple solid-state battery electrode sheets.

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