JP5462580B2 - Multilayer battery manufacturing equipment - Google Patents

Description

  The present invention relates to an apparatus for manufacturing a stacked battery in which sheet-like positive electrodes and negative electrodes are alternately stacked via separators.

  As a battery used in a hybrid vehicle or an electric vehicle, the demand for a stacked lithium ion secondary battery is increasing. This is made by alternately laminating sheet-like positive and negative electrodes through separators. For example, the positive electrode is made of aluminum foil coated with lithium cobalt oxide or lithium nickelate, and the negative electrode is made of copper. The foil is coated with graphite, and the separator is made of a polymer film or the like. By increasing the number of layers, the capacity can be increased.

  By the way, with the increase in demand, the production apparatus has been required to increase the production speed. However, as a production apparatus for a laminated battery represented by the above-described lithium ion secondary battery, conventionally, patent literature There was an apparatus as shown in FIG.

JP 2008-282756 A

  However, the apparatus of Patent Document 1 has a limitation in increasing the production speed because the arm rotation operation and vertical operation and pad adsorption and release are performed for each step of laminating the positive electrode, the negative electrode, and the separator. there were.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a stacked battery manufacturing apparatus capable of high-speed production of a battery material in which a positive electrode, a negative electrode, and a separator are stacked.

This onset Ming, a sheet-shaped positive electrode and the negative electrode apparatus for producing a laminate cell formed by stacking alternately with a separator, a positive electrode, continuously formed via an easy break line disconnecting each anode and a separator The continuous positive electrode material, the continuous negative electrode material, and the continuous separator material are used as raw materials, and the raw materials are continuous separator material, continuous positive electrode material, continuous separator material, continuous negative electrode material or continuous separator material, continuous negative electrode material, continuous separator material, continuous positive electrode. A substantially cylindrical winding means for winding the continuous battery material formed by overlapping each broken line in the order of the materials, and the wound continuous battery material on the side peripheral surface of the winding means a pressing means for pressing, after wound requires stacking number the continuous cell material to said winding means, and a cutting means for cutting said continuous cell material for each fracture line, said cutting means, Some of the circumferential side circumferential surface of the Kimaki times means, characterized in der Rukoto those projecting radially.

According to the onset bright, continuous cathode material, as a material a continuous negative electrode material and a continuous separator material can be superimposed only winding them to the winding unit. In order to wind, it is only necessary to rotate the winding means, and in this one step, each material can be stacked in the required number of layers, and after that, it is only necessary to cut this for each broken line. Compared with the case where the negative electrode and the separator are laminated one by one, the number of processes is small, and the production speed can be increased. Moreover, if a part of the circumferential direction of the side peripheral surface of the winding means is protruded in the radial direction, a tensile force acts in the longitudinal direction of the continuous battery material, and it is cut at the breaking line. When cutting with a cutter or the like from the outer peripheral side of the winding means, the cutting edge must be accurately positioned at the cutting location, but according to the present invention, it can be cut easily and reliably with a break line.

The schematic diagram of the laminated battery manufacturing apparatus of this invention. Explanatory drawing of the shape of a raw material. The perspective view of a battery material.

  A specific configuration of the multilayer battery manufacturing apparatus of the present invention will be described with reference to the drawings. This apparatus uses a continuous positive electrode material P1, a continuous negative electrode material N1, and a continuous separator material S1 that are continuously formed through a perforated break line L that allows easy separation of the positive electrode P, the negative electrode N, and the separator S. Although both the positive electrode P and the negative electrode N are substantially rectangular, an electrode tab T with a part of one side extending is necessary, and the electrode is obtained by bending the break line L as shown in FIG. A tab T is formed. The separator S is a rectangle, and the breaking line L is a straight line.

  These continuous positive electrode material P1, continuous negative electrode material N1, and continuous separator material S1 are wound in a roll shape as shown in FIG. And each raw material is pulled out and wound up by the winding means 1 consisting of a rotating cylindrical drum to form a continuous battery material B1. As shown in FIG. 2B, the continuous battery material B1 is arranged such that the positions of the break lines L coincide with each other in the order of the continuous separator material S1, the continuous positive electrode material P1, the continuous separator material S1, and the continuous negative electrode material N1. It is superimposed. However, the positive electrode P and the negative electrode N are overlapped with each other so that the positions of the electrode tabs T are reversed.

  A pressing means 2 is provided around the winding means 1. The pressing means 2 comprises a rotating roller, abuts against the continuous battery material B1 wound around the winding means 1, presses the continuous battery material B1 against the side peripheral surface of the winding means 1, and the continuous battery material B1 is wound. It is prevented from leaving the turning means 1. Further, the winding means 1 has a side circumferential surface divided in the circumferential direction, and a part thereof can protrude in the radial direction, and this functions as the cutting means 3. The circumferential length of the winding means 1 substantially coincides with an integral multiple of the interval between the breaking lines L of the continuous battery material B1, and the division interval substantially coincides with the interval between the breaking lines L of the continuous battery material B1.

  In the apparatus configured as described above, first, each material is wound around the winding means 1 to form the continuous battery material B1 (FIG. 1A). Then, by continuing to rotate the winding means 1, the continuous battery material B1 is stacked on the side peripheral surface of the winding means 1 several times, and the winding means 1 is stopped when the necessary number of layers is wound. (FIG. 1 (b)). Here, since the circumferential length of the winding means 1 substantially coincides with an integral multiple of the interval between the breaking lines L of the continuous battery material B1, the breaking lines L always overlap each other no matter how many layers of the continuous battery material B1 are stacked. (Strictly speaking, the circumferential length becomes longer each time the layers are stacked, so a deviation occurs. However, if the diameter of the winding means 1 is sufficiently increased, the deviation becomes negligible). At this time, the pressing means 2 is in contact with the surface of the continuous battery material B1, and the continuous battery material B1 is pressed against the side peripheral surface of the winding means 1. Then, the continuous battery material B1 pressed by the pressing means 2 is cut by the cutting means 3. Here, as shown in FIG. 2 (b), the fracture lines L of the superimposed materials are not completely coincident with each other. Although it cannot cut | disconnect, when the cutting | disconnection means 3 protrudes to radial direction, tensile force will act on the continuous battery material B1 in a longitudinal direction (circumferential direction), and it will be torn off by the fracture | rupture line L, positive electrode P, negative electrode N And battery material B with which separator S overlapped is formed (Drawing 1 (c)).

  The battery material B formed in this way is bundled so that the respective materials do not fall apart, and is removed from the winding means 1. A perspective view of the completed battery material B is shown in FIG. Regarding the battery material B, the electrode tabs T (P) of the positive electrode P and the electrode tabs T (N) of the negative electrode N are connected to each other, and the battery tab B is placed in a case and immersed in an electrolytic solution to obtain a battery.

  The laminated battery manufacturing apparatus configured as described above can be superposed by simply winding these around a winding means composed of a drum using a continuous positive electrode material, a continuous negative electrode material and a continuous separator material as materials. In order to wind, it is only necessary to rotate the winding means, and in this one step, each material can be stacked in the required number of layers, and after that, it is only necessary to cut this for each broken line. Compared with the case where the negative electrode and the separator are laminated one by one, the number of processes is small, and the production speed can be increased. And since the cutting means makes a part of the circumferential direction of the circumferential surface of the winding means protrude in the radial direction, it can be cut along the breaking line by applying a tensile force in the longitudinal direction of the continuous battery material. When cutting with a cutter or the like from the outer peripheral side of the winding means, the cutting edge must be accurately positioned at the cutting location, and each overlapping material, such as the continuous battery material of the present invention, is cut at different break lines Although it is difficult to do, according to this invention, it can cut | disconnect according to the broken line of each raw material simply and reliably.

  The present invention is not limited to the above embodiment. For example, the pressing means may be anything as long as it can press the continuous battery material against the side peripheral surface of the winding means and prevent the continuous battery material from being separated from the winding means. Further, the cutting means does not protrude from the side peripheral surface itself of the winding means, but may be a member from which another member built in the winding means protrudes.

DESCRIPTION OF SYMBOLS 1 Winding means 2 Pressing means 3 Cutting means P Positive electrode P1 Continuous positive electrode material N Negative electrode N1 Continuous negative electrode material S Separator S1 Continuous separator material L Break line B1 Continuous battery material

Claims (1)

An apparatus for manufacturing a laminated battery in which sheet-like positive electrodes and negative electrodes are alternately laminated via separators,
As a raw material, a continuous positive electrode material, a continuous negative electrode material, and a continuous separator material continuously formed through a break line that is easy to separate the positive electrode, the negative electrode, and the separator,
Each material is formed in the order of a continuous separator material, a continuous positive electrode material, a continuous separator material, a continuous negative electrode material or a continuous separator material, a continuous negative electrode material, a continuous separator material, and a continuous positive electrode material, with their respective break lines aligned. A substantially cylindrical winding means for winding the continuous battery material,
A pressing means for pressing the wound continuous battery material against a side peripheral surface of the winding means;
A cutting means for cutting the continuous battery material for each broken line after winding the continuous battery material on the winding means for the required number of layers ;
Said cutting means, the stacked cell manufacturing apparatus according to claim der Rukoto which a part of the circumferential side circumferential surface of the winding means projecting radially.

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