CN-121994005-A - Method and apparatus for manufacturing bipolar battery

Abstract

The invention provides a method and an apparatus for manufacturing a bipolar battery, which can optimize the moisture contained in an electrode coating film. The method for manufacturing the bipolar battery comprises a dry environment maintaining step of maintaining a dry environment in a housing part of a conveying device for housing and conveying sheets having electrode surfaces by dry air supplied from a dry air supply device. The drying environment maintaining step includes a step of adjusting an adjusting mechanism capable of adjusting at least one of an injection direction and an injection amount of the drying air injected to the electrode surface.

Inventors

• NAKABAYASHI MASASUKE
• OHNO MASATO

Assignees

• 丰田自动车株式会社

Dates

Publication Date

20260508

Application Date

20251105

Priority Date

20241107

Claims (5)

1. 1. A method for manufacturing a bipolar battery is characterized by comprising the following steps: a drying environment maintaining step of maintaining a drying environment in a housing portion of a conveying device for housing and conveying the sheet having the electrode surface by the drying air supplied from the drying air supply device, The drying environment maintaining process comprises the following steps: An adjustment step of adjusting an adjustment mechanism capable of adjusting at least one of an injection direction and an injection amount of the dry air to be injected onto the electrode surface.
2. 2. The method for manufacturing a bipolar battery as claimed in claim 1, wherein, The adjusting mechanism comprises: a plurality of ejection openings provided in the conveying device in a conveying direction in which the sheet is conveyed, The adjustment procedure is carried out as follows: The amount of the dry air ejected from the ejection port is adjusted to be gradually increased for each predetermined section along the sheet conveying direction.
3. 3. The method for manufacturing a bipolar battery as claimed in claim 1, wherein, The adjusting mechanism comprises: A plurality of ejection openings provided up and down in the conveying device in a conveying direction in which the sheet is conveyed, The adjustment procedure is carried out as follows: The injection amount of the dry air from the injection port on the upper side is adjusted to be larger than the injection amount of the dry air from the injection port on the lower side.
4. 4. The method for manufacturing a bipolar battery as claimed in claim 1, wherein, The adjustment procedure is carried out as follows: The ejection direction of the dry air is ejected in an oblique direction toward a conveying direction in which the sheet is conveyed.
5. 5. A bipolar battery manufacturing apparatus is characterized by comprising: a conveying device that conveys a sheet having an electrode surface; a receiving portion for receiving the conveying device, and A dry air supply device for supplying dry air into the accommodating portion to maintain the interior of the conveying device in a dry environment, The dry air supply device comprises: And an adjusting mechanism capable of adjusting at least one of an injection direction and an injection amount of the dry air injected with respect to the electrode surface.

Description

Method and apparatus for manufacturing bipolar battery Technical Field The present invention relates to a method and an apparatus for manufacturing a bipolar battery. Background Patent document 1 discloses a technique of a sealed battery manufacturing apparatus that reduces entry of moisture into the sealed battery. In this manufacturing apparatus, in order to prevent moisture from adhering to a workpiece during the manufacturing process from the winding process to the sealing process, a dry air supply device for supplying dry air is provided inside a plurality of accommodating portions that accommodate the winding device, the intermediate device, the sealing device, and the conveyor line, respectively. Patent document 1 Japanese patent application laid-open No. 2019-139994 Disclosure of Invention In a conventional bipolar battery in a dry environment, there is a problem in that evaporation of moisture contained in coating films of the positive electrode and the negative electrode is different. However, in patent document 1, the dry air supply device is used only in the interior of the housing portion as a dry environment, and thus moisture adhesion cannot be sufficiently reduced, which results in deterioration of battery performance, and there is room for improvement in application of dry air to the electrode coating film. The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a method for producing a bipolar battery and an apparatus for producing a bipolar battery, which can optimize moisture contained in an electrode coating film. The method for manufacturing a bipolar battery according to the present invention includes a dry environment maintaining step of maintaining a dry environment in a housing portion of a conveying device housing a sheet having an electrode surface by dry air supplied from a dry air supply device, wherein the dry environment maintaining step includes a step of adjusting an adjusting mechanism capable of adjusting at least one of a direction and an amount of injection of the dry air injected with respect to the electrode surface. The bipolar battery manufacturing apparatus according to the present invention includes a conveying device that conveys a sheet having an electrode surface, a housing portion that houses the conveying device, and a dry air supply device that supplies dry air into the housing portion to maintain the interior of the conveying device in a dry environment, wherein the dry air supply device includes an adjustment mechanism that can adjust at least one of a direction and an amount of injection of the dry air injected against the electrode surface. Effects of the invention According to the present invention, the effect of optimizing the moisture contained in the electrode coating film can be exhibited. Drawings Fig. 1 is a cross-sectional view showing a schematic configuration of a bipolar battery manufacturing apparatus according to embodiment 1 of the present invention. Fig. 2 is a plan view showing a schematic configuration of a bipolar battery manufacturing apparatus according to embodiment 1 of the present invention. Fig. 3 is a cross-sectional view showing a schematic configuration of a bipolar battery manufacturing apparatus according to embodiment 2 of the present invention. Fig. 4 is a cross-sectional view showing a schematic configuration of a bipolar battery manufacturing apparatus according to embodiment 3 of the present invention. Fig. 5 is a cross-sectional view showing a schematic configuration of a bipolar battery manufacturing apparatus according to embodiment 4 of the present invention. Fig. 6 is a plan view showing a schematic configuration of a bipolar battery manufacturing apparatus according to embodiment 4 of the present invention. Fig. 7 is a cross-sectional view showing a schematic configuration of a bipolar battery manufacturing apparatus according to embodiment 5 of the present invention. Detailed Description Hereinafter, a method for manufacturing a bipolar battery and an apparatus for manufacturing a bipolar battery according to an embodiment of the present invention will be described with reference to the drawings. In addition, the constituent elements in the following embodiments include elements that can be easily replaced by those skilled in the art or substantially the same elements. (Embodiment 1) [ Outline Structure of device for manufacturing bipolar Battery ] Fig. 1 is a cross-sectional view showing a schematic configuration of a bipolar battery manufacturing apparatus according to embodiment 1. Fig. 2 is a plan view showing a schematic configuration of a bipolar battery manufacturing apparatus according to embodiment 1. The manufacturing apparatus 1 shown in fig. 1 and 2 is an apparatus for manufacturing a cylindrical wound electrode body 101 by winding a strip-shaped sheet 100 having an electrode around an axis. In the wound electrode body 101, a positive electr