Manufacturing method of power storage device

Abstract

To provide a manufacturing method of a power storage device, capable of easily attaching a resin component while correcting a position of each terminal.SOLUTION: A manufacturing method of a power storage device, according to the present disclosure, is a method for manufacturing a power storage device 100 by inserting a plurality of terminals 300 for detecting a voltage of each of a plurality of bipolar electrodes in the power storage device 100 to which the plurality of bipolar electrodes is laminated into a resin component 400 having a housing part 410 that houses the plurality of terminals 300 one by one, and is installed so as to be collected to one part of the power storage device 100, and inserts the plurality of terminals 300 into the resin component 400 after each position of the plurality of terminals 300 is fixed by passing a comb 500 of which a tooth is extended to a lateral direction, a comb 600 of which a tooth is extended to a vertical direction, and a comb 700 of which a tooth is extended to the lateral direction in this order from a root side of the plurality of terminals 300 arranged in a liner shape to the vertical and lateral directions.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a method for manufacturing a power storage device.

Background Art

[0002] In a power storage device in which a plurality of bipolar electrodes are stacked, terminals for detecting the voltage of each bipolar electrode may be installed. For example, Patent Document 1 discloses a power storage device including a terminal having one end connected to each electrode and the other end protruding outside the power storage device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventors have found the following problems regarding the method for manufacturing a power storage device. The ends of the terminals protruding outside the power storage device may be housed in a resin member in order to facilitate connection with a voltage measuring device. The resin member is provided with a plurality of housing portions capable of housing each of the ends of the plurality of terminals separately. The position of each terminal may shift due to external stress or the like. Therefore, when housing the plurality of terminals in the resin member, it is necessary to correct the position of each terminal so that each terminal is installed at a position where it can be housed in each housing portion.

[0005] The present disclosure has been made in view of such problems, and an object thereof is to provide a method for manufacturing a power storage device that can easily attach a resin component while correcting the position of each terminal.

Means for Solving the Problems

[0006] One aspect for achieving the above object is In a power storage device in which a plurality of bipolar electrodes are stacked, a method for manufacturing the power storage device by inserting a plurality of terminals for detecting the voltage of each of the plurality of bipolar electrodes into a resin component having a housing portion for housing the plurality of terminals one by one, which is installed in a part of the power storage device and from the base side of the plurality of terminals linearly arranged in the vertical and horizontal directions, passes a comb with teeth extending in the horizontal direction, a comb with teeth extending in the vertical direction, and a comb with teeth extending in the horizontal direction in this order to fix the positions of the plurality of terminals, and then inserts the plurality of terminals into the resin component.

Advantages of the Invention

[0007] According to the present disclosure, it is possible to provide a method for manufacturing a power storage device that can easily attach a resin component while correcting the positions of the respective terminals.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In each drawing, the same or corresponding elements are denoted by the same reference numerals, and redundant descriptions are omitted as necessary for clarity of explanation. Also, for ease of understanding, the scales of the respective parts in the drawings may be different from the actual ones. In the directions such as parallel, right angle, orthogonal, horizontal, vertical, up and down, left and right, etc., a deviation is allowed to the extent that the effects of the embodiments are not impaired. The parallel, right angle, orthogonal, horizontal, and vertical may include substantially parallel, substantially right angle, substantially orthogonal, substantially horizontal, and substantially vertical. Also, in this specification, "substantially" means a state in which a person would consider having the same shape and the same dimensions when looking. Of course, the right-handed xyz orthogonal coordinates shown in FIG. 1 and other drawings are for convenience in explaining the positional relationship of the components. In this specification, the z-axis direction may be referred to as the longitudinal direction. Also, the x-axis direction may be referred to as the lateral direction.

[0010] First, referring to FIG. 1, the configuration of the power storage device 100 manufactured by the method for manufacturing a power storage device according to the present embodiment will be described. As shown in FIG. 1, the power storage device 100 includes a laminate 200, a plurality of terminals 300, and a resin component 400. Note that FIG. 1 illustrates the state before the resin component 400 is attached.

[0011] The laminate 200 is a member in which a plurality of bipolar electrodes and a plurality of separators are alternately laminated. The bipolar electrode is a sheet-like electrode having a positive electrode provided on one surface of a sheet-like current collector and a negative electrode provided on the other surface. In the example shown in FIG. 1, the plurality of bipolar electrodes and the plurality of separators are sheet-like members extending on the xy plane and are laminated in the z-axis direction.

[0012] Terminal 300 is a terminal for detecting the voltage of the bipolar electrode. Each of the plurality of terminals 300 is connected to each of the plurality of bipolar electrodes provided in the laminate 200, and detects the voltage of the connected bipolar electrode. The plurality of terminals 300 are rod-shaped members, one end of which is connected to the bipolar electrode and the other end of which is arranged to protrude outside the laminate 200. The plurality of terminals 300 are arranged such that, for example, as shown in FIG. 1, the ends protruding from a part of the laminate 200 gather together. Also, the plurality of terminals 300 are arranged such that the ends protruding from a part of the laminate are aligned linearly in the vertical and horizontal directions, that is, are arranged in a grid pattern. The distance between the terminals 300 in the horizontal direction may be, for example, 5 mm or more and 10 mm or less. The distance between the terminals 300 in the vertical direction may be, for example, 1 mm or more and 5 mm or less.

[0013] The resin component 400 is a member that protects the ends of the plurality of terminals 300 protruding from the laminate 200. The resin component 400 is provided with a plurality of accommodating portions 410 (see FIG. 3) capable of accommodating each of the plurality of terminals 300 separately. That is, the accommodating portions are provided in a part of the resin component 400 so as to be arranged in a grid pattern.

[0014] FIG. 2 is a perspective view of the terminal 300. As shown in FIG. 2, the end of the terminal 300 on the positive y-axis side extends on the xy plane. The portion of the terminal 300 that extends on the xy plane is inserted into the laminate 200 and connected to the bipolar electrode. The thickness, that is, the dimension in the z-axis direction, of the portion of the terminal 300 that extends on the xy plane may be, for example, 0.1 mm or more and 0.5 mm or less. The end of the terminal 300 on the negative y-axis side is inserted into the accommodating portion provided in the resin component 400. The thickness, that is, the dimension in the x-axis direction, of the end of the terminal 300 on the negative y-axis side may be, for example, 0.1 mm or more and 1 mm or less.

[0015] Figure 3 is an enlarged cross-sectional view of a part of the resin component. Figure 3 is an enlarged cross-sectional view taken when the resin component 400 is cut in a direction parallel to the xy plane at the portion where the accommodating portion 410 is provided. As shown in Figure 3, the accommodating portion 410 is a hole extending in the y-axis direction. An attracting portion 420 is provided at the end of the accommodating portion 410 on the positive y-axis side. The attracting portion 420 is a conical space that widens toward the positive y-axis side and communicates with the accommodating portion 410 on the negative y-axis side. The terminal 300 passes through the attracting portion 420 and is accommodated in the accommodating portion 410. Therefore, even if the position of the terminal 300 is slightly deviated, the tip portion of the terminal 300 can be accommodated in the accommodating portion 410 along the wall surface forming the attracting portion 420. The clearance between the terminal 300 and the accommodating portion 410 may be, for example, 0.1 mm or more and 0.5 mm or less in both the vertical and horizontal directions. That is, when the dimension of the terminal 300 in the x-axis direction is 0.4 mm, the dimension A of the accommodating portion 410 in the x-axis direction may be, for example, about 0.6 mm.

[0016] Next, with reference to FIGS. 4 to 6, a method of attaching the resin component 400, that is, a method of manufacturing the power storage device according to the present embodiment will be described. When attaching the resin component 400, after inserting three combs 500, 600, and 700 into the plurality of terminals 300 in this order, the resin component 400 is inserted into the plurality of terminals 300. FIG. 4 is a side view of the power storage device before attaching the resin component 400. The insertion position 510 shown in FIG. 4 is the position where the comb 500 is inserted. The insertion position 610 is the position where the comb 600 is inserted. The insertion position 710 is the position where the comb 700 is inserted.

[0017] Figure 5(a) is a front view of the comb 500. The comb 500 includes a plurality of teeth extending in the x-axis direction, i.e., the horizontal direction. In the example shown in Figure 5(a), the comb 500 includes teeth with the tip on the negative x-axis side. In this case, the comb 500 is inserted into the plurality of terminals 300 by being moved from the positive x-axis side toward the negative x-axis side. The tip pitch B of the comb 500, i.e., the size of the gap between the tip portions of the teeth, may be, for example, 1 mm or more and 5 mm or less. In the example shown in Figure 5(a), the tip pitch B is 2.41 mm. The root comb width C of the comb 500, i.e., the size of the width of the teeth at the root portion, may be, for example, 1 mm or more and 5 mm or less. In the example shown in Figure 5(a), the root comb width C is 1.20 mm.

[0018] Figure 5(b) is a front view of the comb 600. The comb 600 includes a plurality of teeth extending in the z-axis direction, i.e., the vertical direction. In the example shown in Figure 5(b), the comb 600 includes teeth with the tip on the negative z-axis side. In this case, the comb 600 is inserted into the plurality of terminals 300 by being moved from the positive z-axis side toward the negative z-axis side. The tip pitch D of the comb 600 may be, for example, 1 mm or more and 8 mm or less. In the example shown in Figure 5(b), the tip pitch D is 8.1 mm. The root comb width E of the comb 600 may be, for example, 1 mm or more and 8 mm or less. In the example shown in Figure 5(b), the tip pitch D is, for example, 7.0 mm.

[0019] Figure 5(c) is a front view of the comb 700. The comb 700 includes a plurality of teeth extending in the horizontal direction. In the example shown in Figure 5(c), the comb 700 includes teeth with the tip on the negative x-axis side. In this case, the comb 700 is inserted into the plurality of terminals 300 by being moved from the positive x-axis side toward the negative x-axis side. The tip pitch F of the comb 700 may be, for example, 1 mm or more and 5 mm or less. In the example shown in Figure 5(c), the tip pitch F is 3.15 mm. The root comb width G of the comb 700 may be, for example, 1 mm or more and 5 mm or less. In the example shown in Figure 5(c), the root comb width C is 2.14 mm.

[0020] FIG. 6 is a front view of a plurality of terminals 300 when the comb 600 is inserted. In the method for manufacturing a power storage device according to the present embodiment, as shown in FIG. 6, after inserting the comb 500, the comb 600 is inserted. Since the combs 500 and 700 have teeth extending in the horizontal direction, the deviation in the vertical direction of the plurality of terminals 300 can be corrected. Further, since the comb 600 has teeth extending in the vertical direction, the deviation in the horizontal direction of the plurality of terminals 300 can be corrected. Therefore, by inserting the three combs 500, 600, and 700, the deviation in the vertical and horizontal directions of the plurality of terminals 300 can be corrected.

[0021] As shown in FIG. 5, the comb 700 may have a larger root comb width than the comb 500. Further, the comb 700 may have a smaller pitch (interval) between teeth than the comb 500. That is, the pitch between adjacent teeth of the comb 700 is narrower than the pitch between adjacent teeth of the comb 500. In this case, the comb 700 corrects the deviation in the vertical direction of the plurality of terminals 300 with higher accuracy than the comb 500. In other words, after the deviation in the vertical direction of the plurality of terminals 300 is roughly corrected by the comb 500, it is further corrected with higher accuracy by the comb 700. The plurality of terminals 300 are usually thin and easily bendable. Therefore, when the deviation is further corrected with higher accuracy by the comb 700 after being roughly corrected by the comb 500, the occurrence of bending and breakage of the plurality of terminals 300 is suppressed.

[0022] In the method for manufacturing a power storage device according to the present embodiment, with the three combs 500, 600, and 700 inserted, the resin part 400 is attached from the tip side of the plurality of terminals 300. When attaching the resin part 400, the three combs 700, 600, and 500 are removed in this order while moving the resin part 400 in the positive y-axis direction, and each of the plurality of terminals 300 is accommodated in the accommodation part 410. That is, the three combs 500, 600, and 700 function as a guide for the resin part 400 when attaching the resin part 400.

[0023] Note that the present disclosure is not limited to the above embodiment, and can be appropriately changed without departing from the gist.

Description of Symbols

[0024] 100 Power storage device 200 Laminate 300 Multiple terminals 400 Resin part 410 Accommodating portion 420 Inducing portion 500, 600, 700 Comb

Claims

1. A method for manufacturing an electric storage device in which a plurality of bipolar electrodes are stacked, the method comprising inserting a plurality of terminals for detecting the voltage of each of the plurality of bipolar electrodes into a resin component having a housing portion for housing each of the plurality of terminals one by one, wherein the plurality of terminals are installed in a concentrated manner on a part of the electric storage device, and after fixing the positions of each of the plurality of terminals by passing a comb with teeth extending in the horizontal direction, a comb with teeth extending in the vertical direction, and a comb with teeth extending in the horizontal direction in this order from the base side of the plurality of terminals linearly arranged in the vertical and horizontal directions, the plurality of terminals are inserted into the resin component. A method for manufacturing an electric storage device.

2. The distance between the terminals in the horizontal direction of the plurality of terminals is 5 mm or more and 10 mm or less, and the distance between the terminals in the vertical direction is 1 mm or more and 5 mm or less. The method for manufacturing an electric storage device according to Claim 1.

3. The clearance between each of the plurality of terminals and the housing portion of the resin component is 0.1 mm or more and 0.5 mm or less. The method for manufacturing an electric storage device according to Claim 1 or 2.

Images