JP2005293919A - Battery, and manufacturing method of clad plate used for the battery, and manufacturing method of lead plate of battery pack parts and battery pack parts and lead plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery formed so as not to confuse front side of a clad plate with the rear side thereof by mistake, when fixing a battery case and a cathode lead plate via the clad plate. <P>SOLUTION: The battery has a battery case made of first metal housing a power generating element, and a current-extracting lead plate, made of second metal taking out a current from the power generating element. A cathode lead plate is fixed to the battery case by the clad plate 121, of which a first layer 121a made of a metal which can be welded to the first metal is welded to the battery case, and a second layer 121b made of a metal, which can be welded to the second metal, is welded to the cathode lead plate. The front side of the clad plate 121 is made so as to not to appear different from the back side thereof, by forming the shape of the clad plate 121 asymmetric to an axis line in planar view. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a chargeable / dischargeable nonaqueous electrolyte secondary battery, specifically a battery such as a lithium ion secondary battery, which is mainly used as a power source for portable electronic devices such as video cameras, mobile computers, and cellular phones. It is related with the battery pack components which are accommodated in an exterior case with such a battery and comprise a battery pack. More particularly, the present invention relates to a battery that uses a clad plate for fixing a current extraction lead plate to a battery case, and a method of manufacturing such a clad plate, and further, a lead plate is attached to each of the front and back sides of an electronic component. The present invention relates to a battery pack component and a method of manufacturing such a lead plate.

  In recent years, chargeable / dischargeable non-aqueous electrolyte secondary batteries, such as lithium ion secondary batteries, are mainly used as power sources for portable electronic devices such as video cameras, mobile computers, and mobile phones that are rapidly spreading.

  In a lithium ion secondary battery (hereinafter simply referred to as a battery), a protection circuit for controlling the battery voltage is provided outside to prevent overcharge and overdischarge. The battery pack in a state of being housed in a resin outer case is actually mounted on an electronic device. By the way, the protective circuit and the battery are electrically connected by a lead plate for connection. As the lead plate, the electrical size of the battery in the outer case is of course as well as the electrical connectivity with the protective circuit. In other words, in order to make the outer case as small as possible with respect to the size of the battery, a nickel material or a stainless steel material plated with nickel on the surface is used in the form of a plate material. .

  FIG. 15 is a schematic exploded perspective view of a general configuration example of a conventional battery pack. In the battery pack, a rectangular parallelepiped battery case 11 is accommodated in a synthetic resin rectangular parallelepiped outer case 30 that is slightly larger than that. The exterior case 30 is composed of a rectangular parallelepiped first exterior case half 31 and a second exterior case half 32 that are open on one side. Both outer case halves 32 and 32 are formed to have the same outer dimension on one open side, and the battery case 11 and other circuits are placed inside the open case in a state where the open one side faces each other. A cavity that can accommodate the like is formed.

  The battery case 11 is made of aluminum or an aluminum alloy, and a nonaqueous electrolyte secondary battery including a power generation element in which a positive electrode and a negative electrode are wound with a separator interposed therebetween, specifically a lithium ion secondary battery or the like. A secondary battery 10 is accommodated. A negative electrode terminal 33 insulated from the battery case 11 is formed on one side surface (bottom surface in FIG. 15) of the battery case 11, and the entire battery case other than the portion where the negative electrode terminal 33 is provided serves as the positive electrode terminal. Become.

  A protective circuit board 34 is attached to the side surface (upper surface in FIG. 15) facing the one side surface of the battery case 11 where the above-described negative electrode terminal 33 is provided. The protection circuit board 34 is a board provided with a protection circuit for preventing overcharge or overdischarge of the battery 10. The protective circuit board 34 has a circuit element (not shown) mounted on the surface (the lower surface in FIG. 15) facing the battery case 11, and the opposite side, that is, the outer surface (in FIG. 15). On the upper surface), positive and negative electrode terminals 34a for taking out electric power to the outside and conversely taking in electric power from outside for charging are projected. In addition, a through hole 31a is formed in one side surface (upper surface in FIG. 15) of the first exterior case half 31 so that the output terminal 34a of the protection circuit board 34 penetrates and the tip part protrudes slightly. .

  The protective circuit board 34 is fixed to the clad plate 12 fixed to the battery case 11 that also serves as the positive terminal of the battery 10 through the positive electrode lead plate 20 made of nickel. One surface of the clad plate 12 is fixed to the side surface to which the protection circuit board 34 of the battery case 11 is attached by welding, and the other surface is fixed to the positive electrode lead plate 20 by welding. Therefore, the positive electrode lead plate 20 is fixed to the battery case 11 via the clad plate 12.

  Further, the protection circuit board 34 is also connected to the negative electrode terminal 33 of the battery 10 through a negative electrode lead plate 22 made of nickel and a PTC (Positive Temperature Coefficient) element 28. The PTC element 28 is a protective element that cuts off a circuit when the temperature of the battery 10 is abnormally increased and becomes high resistance in response to the temperature.

  The negative electrode lead plate 22 is provided on both sides to connect between the side surface (bottom surface in FIG. 15) provided with the negative electrode terminal 33 of the battery case 11 and the side surface (top surface in FIG. 15) provided with the protection circuit board 34. It is provided along one side surface (right side surface in FIG. 15). However, since the battery case 11 as a whole other than the negative electrode terminal 33 also serves as a positive electrode terminal, an insulating sheet 16 is interposed between the negative electrode lead plate 22 and the PTC element 28 and the battery case 11 to prevent a short circuit. ing.

  The battery case 11 to which the protective circuit board 34 is connected has a double-sided adhesive tape 35 in a cavity formed when the protective circuit board 34 and the through-holes 31a are aligned and the outer case halves 31 and 32 are combined. It is fixed and accommodated. Then, the two outer case halves 31 and 32 are fixed to each other by bonding, heat welding, ultrasonic welding, or the like to form one box-like container, whereby the electrode terminal 34a is inserted into the through hole 31a of the outer case 30. Is formed. Normally, products are distributed in the state of this battery pack, and are mounted on various electronic devices in the state of such a battery pack.

  By the way, the positive electrode lead plate 20 made of nickel is fixed to the battery case 11 which also serves as the positive electrode terminal via the clad plate 12 except for the portion where the negative electrode terminal 33 is formed. According to the following. That is, the positive lead plate 20 is directly fixed to the battery case 11 by welding because the battery case 11 is made of aluminum or an aluminum alloy, and thus the resistance of the battery case 11 is good in resistance welding. Also, in the ultrasonic welding method, the positive electrode lead plate 20 is made of nickel (or made of stainless steel) and is not melted.

  Under such circumstances, for example, a laser welding method has been studied in order to fix the positive electrode lead plate 20 to the battery case 11 without using the clad plate 12 as described above. However, when the laser welding method is used, the environmental conditions of use are markedly restricted, the apparatus is expensive, and the productivity is low, leading to an increase in the manufacturing cost of the battery (battery pack). was there.

  In order to solve such problems, the conventional technique as described above, that is, one layer made of aluminum or an aluminum alloy of the clad plate 12 having a two-layer structure is resistance-welded to the battery case 11 and nickel of the clad plate is obtained. Patent Document 1 discloses an invention in which the other made layer is resistance welded to the positive electrode lead plate 20 made of nickel.

FIG. 16 is a schematic diagram showing a configuration example of the clad plate 12 shown in FIG. FIG. 16A is a schematic diagram showing a planar shape of the clad plate 12, which is a rectangular plate having a width narrower than the width of one side surface (upper surface in FIG. 15) to which the protection circuit board 34 of the battery case 11 is attached. It has an outer shape. FIG. 16B is a schematic view showing a side surface of the clad plate 12. The clad plate 12 has a two-layer structure as described above. The surface of one layer 12a is welded to the battery case 11, and the surface of the other layer 12b is welded to the positive electrode lead plate 20, thereby The positive electrode lead plate 20 is fixed.
JP 09-330696 A

  In the clad plate disclosed in Patent Document 1 described above, one of the layers is resistance-welded to the battery case, and the other layer is resistance-welded to the positive electrode lead plate. I can't. For this reason, when assembling the battery pack, it is necessary to make sure that the clad plate is not mistaken in the front and back, but in the past, the operator visually identified the difference in the metallic luster on both sides, so in the battery assembly process There was a possibility of erroneous determination.

  Incidentally, the battery pack as described above includes other components that require front / back identification. It is a component having a configuration in which a plurality of lead plates are attached to an electronic component such as a polyswitch. If the front / back determination is manufactured incorrectly, it becomes a defective product. FIG. 17 is a schematic diagram for explaining a configuration example of a battery pack component in which a plurality of lead plates are attached to such a polyswitch and the reason why front / back determination is necessary.

  FIG. 17A is a schematic side view showing a configuration of a battery pack component in which a plurality of lead plates are attached to a polyswitch. The poly switch 51 has a plate-like shape, and lead plates 61 and 62 are attached to both surfaces thereof, thereby constituting one battery pack component 50. One lead plate 62 of the battery pack component assembled in this way is further connected to another lead plate 63. As shown in FIG. 17A, when the battery pack component 50 is normally connected to the lead plate 63, the lead plates 63 and 62, the polyswitch 51, and the lead plate 61 are arranged in this order (or reverse order). Thus, a current flows through the polyswitch 51.

  However, when the battery pack component 50 is sent to a device for connecting the lead plate 63 with the front and back sides reversed, as shown in FIG. 17 (b), the lead plate is originally passed through the lead plate 62 and the polyswitch 51. Since the lead plate 61 to be indirectly connected to the 63 is directly connected to the lead plate 63, no current flows through the poly switch 51.

  Furthermore, there are other problems with the lead plates 61 and 62 used in the battery pack component 50 as described above. FIG. 18 is a schematic side sectional view for explaining problems existing in the lead plate itself. The lead plate is usually manufactured from a metal plate 60 as a base material by punching using a die. In the punching process, when the metal plate 60 that is the base material is punched in the direction of the arrow shown in FIG. 18, a “burr” is formed that protrudes in a substantially orthogonal direction at the peripheral edge with respect to the surface of the lead plate. When the battery pack is assembled so that the surface from which the “burr” protrudes is covered with the insulating tape, the “burr” breaks through the insulating tape to cause an insulation failure. Needless to say, when the strip-shaped base material is cut, a “burr” is generated on the cut surface.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a battery in which the front and back of the clad plate are not mistaken when the battery case and the positive electrode lead plate are fixed via the clad plate. And

  Another object of the present invention is to provide a method for producing a clad material used in the battery as described above.

  Furthermore, according to the present invention, when the lead plate is attached and it is necessary to judge the front and back, it is possible to easily judge the front and back, and so that the “flash” of the lead plate does not cause an insulation failure or the like. An object of the present invention is to provide a battery pack component and a lead plate thereof.

  Still another object of the present invention is to provide a method for producing a lead plate for a battery pack component as described above.

  In short, the present invention presents the planar shape of the clad plate, which is a connecting member interposed between the two in order to fix the positive electrode lead plate to the battery case by welding, and has a different shape on the front and back sides, and is rotated on the plane. However, it is configured not to match. In addition, the planar shape of the lead plate attached to the battery pack component is such that the outer shape of the surface facing the electronic component when attached to the electronic component and the outer shape of the surface not facing the electronic component are flat. The shape does not match even when rotated and is point-symmetric. Furthermore, the outer shape of the planar shape of the battery pack component in which the lead plate is attached to both the front and back surfaces is configured to be line symmetric and not point symmetric.

  The battery according to the present invention includes a first metal battery case that houses a power generation element, and a second metal current extraction lead plate that extracts current from the power generation element, and the first layer is the battery. A battery in which the current extraction lead plate is fixed to the battery case by a clad plate fixed to the case and a second layer fixed to the current extraction lead plate, wherein the first layer is the battery. The outer shape of the surface on the second layer side that becomes the outer surface when fixed to the case and the outer shape of the surface on the first layer side that becomes the outer surface when the second layer is fixed to the battery case are planar. It is characterized by having a shape that does not match even when rotated.

  In such a battery invention according to the present invention, when the clad plate is reversed, even if the clad plate is rotated in a plane, it does not match the shape when the front and back are not reversed.

  A method for manufacturing a clad plate used in a battery according to the present invention includes a first metal battery case that houses a power generation element, a second metal current extraction lead plate that extracts current from the power generation element, and A battery including a clad plate for fixing the current extraction lead plate to the battery case by fixing the first layer to the battery case and the second layer to the current extraction lead plate. In the method of manufacturing the clad plate by continuously cutting a strip-shaped base material, the outer shape of the surface on one side of each clad plate and the outer shape of the surface on the other side are rotated on a plane. The base material is cut across the width direction along a cutting line that has a shape that does not match.

  In such a method for manufacturing a clad plate used in a battery according to the present invention, the above-described clad plate is manufactured only by being cut from a strip-shaped base material by one cutting line.

  In addition, the battery pack component lead plate according to the present invention is provided in the battery pack component housed in the battery pack outer case together with the battery, and the front and back surfaces of the plate-like electronic component in which current flows between the front and back surfaces. In the lead plate of the battery pack component attached to each, the outer shape of the surface facing the electronic component when mounted on the electronic component and the outer shape of the surface not facing the electronic component rotate on a plane. Even if it is made to correspond, it is comprised, and it is comprised by point symmetry.

  Such a lead plate of the battery pack component of the present invention exhibits the same shape when rotated 180 degrees on a plane. However, when the front and back are reversed, the front and back are reversed even if the plane is rotated. Does not match the shape when there is no.

  Furthermore, the first invention of the battery pack component according to the present invention is a battery in which a lead plate is attached to each of the front and back surfaces of a plate-like electronic component in which a current flows between the front and back surfaces, and the battery is housed in an outer case of the battery pack together with the battery. In the pack component, the lead plate is configured so that the outer shape of the surface facing the electronic component when mounted on the electronic component and the outer shape of the surface not facing the electronic component are rotated on a plane. And the lead plate is attached to each of the front and back surfaces of the electronic component in line symmetry with the one surface or the other surface facing each other. It is characterized by.

  According to a second aspect of the battery pack component of the present invention, a lead plate is attached to each of the front and back surfaces of a plate-like electronic component that allows current to flow between the front and back surfaces, and is housed in the battery pack outer case together with the battery. In the battery pack component, the outer shape of the planar shape when the lead plate is attached to each of the front and back surfaces of the electronic component is line symmetric and not point symmetric, so that the outer shape of the front and back surfaces is different, and When rotated on a plane, the outer shape of the front surface and the outer shape of the back surface are made to coincide with each other.

  In the first and second aspects of the battery pack component according to the present invention, the outer shape of the planar shape when the lead plate is attached to each of the front and back surfaces of the electronic component is line symmetric and not point symmetric. Therefore, when the front and back are reversed, a different shape is exhibited. However, when the front and back are rotated 180 degrees while being reversed, the same shape as when the front and back are not reversed is exhibited.

  Furthermore, in the method for manufacturing a lead plate for a battery pack component according to the present invention, a lead plate is attached to each of the front and back surfaces of a plate-like electronic component that allows current to flow between the front and back surfaces, and is housed in the battery pack outer case together with the battery. In the method of manufacturing the lead plate of the battery pack part by continuously cutting a strip-shaped base material, the outer shape of the surface on one side of each lead plate and the outer shape of the surface on the other side coincide on a plane. And the base material is cut across the width direction along a cutting line that has a point-symmetric shape.

  In such a method of manufacturing a lead plate for a battery pack component according to the present invention, the above-described lead plate of the present invention is manufactured only by being cut from a strip-shaped base material by one cutting line.

  According to the battery invention of the present invention, the clad plate looks different depending on which surface is facing upward, so there is no possibility of misjudging the front and back, and an improvement in production efficiency is expected.

  Moreover, according to the manufacturing method of the clad plate used for the battery according to the present invention, each clad plate is produced by only being cut from the band-shaped base material by one cutting line. When the individual clad plates are cut and obtained, so-called chips are not generated. Therefore, there is no possibility that the chips of the clad material get mixed into the battery assembly process and an electrical short circuit or the like occurs, and the possibility that a defective product is generated is reduced.

  Further, according to the lead plate of the battery pack component according to the present invention, when the front and back are reversed, different shapes are presented, so that the front / back determination is easy, and when they are rotated 180 degrees, the same shape is exhibited. Therefore, it is not necessary to align the direction when attaching to the battery pack parts, so that work efficiency is improved.

  According to the first aspect of the battery pack component of the present invention, since the lead plate looks different in plan shape depending on which side is facing upward, there is no possibility of misjudging the front and back, and improvement in production efficiency There is expected. In addition, the overall shape of the battery pack component also looks different on the front and back surfaces, and the same result as when the front and back are reversed by rotating around the center of symmetry is obtained. It is easy to determine the front and back, and even when it is found that the front and back are reversed, it is not necessary to turn the front and back again, and the normal state can be restored simply by rotating 180 degrees on the plane. Therefore, the battery pack component can be easily mounted on the jig in a normal state.

  Furthermore, according to the method for manufacturing a lead plate for a battery pack component according to the present invention, each lead plate is manufactured only by being cut from the strip-shaped base material by one cutting line. When the lead plate is cut and obtained, so-called chips are not generated. Accordingly, there is no possibility that the lead material chips get mixed into the battery assembly process and an electrical short circuit or the like occurs, and the possibility that a defective product is generated is reduced.

  Further, according to the second invention of the battery pack component according to the present invention, when the front and back are reversed, the lead plate of the portion protruding from the electronic component has a different shape, so the front and back determination is easy. If it is rotated 180 degrees with the front and back reversed, it will have the same shape as when the front and back are not reversed, so it will only be rotated 180 degrees on the plane without reversing the front and back. Therefore, work efficiency is improved because the front and back sides can be returned to a non-inverted state.

  Hereinafter, the present invention will be described with reference to the drawings showing embodiments thereof. The overall configuration of the battery pack is the same as that of the conventional example shown in FIG. The configuration of the battery of the present invention is different from the conventional example shown in FIG. 15 only in the planar shape of the clad plate described below. Accordingly, the planar shape of the clad plate will be mainly described below.

  FIG. 1 is a schematic diagram showing an example of the configuration of a clad plate used in a battery according to the present invention. In this example, the clad plate is denoted by reference numeral 121. FIG. 1A is a schematic diagram showing a planar shape of the clad plate 121, which is rectangular in plan view with a width narrower than the width of one side surface (the upper surface in FIG. 15) to which the protective circuit board 34 of the battery case 11 is attached. It has a pentagonal plate shape with one corner cut off obliquely. The planar shape of the clad plate 121 shown in FIG. 1A is not line symmetric in any of the length direction and the width direction. Therefore, the clad plate 121 has different shapes on the front and back sides, and even if the clad plate 121 is rotated on a plane with the front and back reversed, the clad plate 121 cannot have the same shape as the shape that is not reversed.

  FIG. 1B is a schematic view showing a side surface of the clad plate 121. The clad plate 121 has a two-layer structure. The surface of one layer 121a is welded to the battery case 11, and the surface of the other layer 121b is welded to the positive electrode lead plate 20, whereby the positive electrode lead plate 20 is attached to the battery case 11. Is fixed in the same manner as in the conventional example shown in FIG.

  FIG. 2 is a schematic external perspective view showing a state in which the clad plate 121 shown in FIG. 1 is fixed to the battery case 11. If the state shown in FIG. 2A is a state in which the clad plate 121 is normally welded to the battery case 11 (or placed for welding), the clad plate 121 is upside down. As shown in the schematic external perspective view of FIG. 2 (b), the normal case shown in FIG. 2 (a) is welded on the battery case 11 (or placed for welding). Since the planar shape of the clad plate 121 is clearly different as compared with the state, the front / back determination is facilitated.

  FIG. 3 is a schematic view showing another example of the configuration of the clad plate used in the battery according to the present invention. In this example, the clad plate is indicated by reference numeral 122. FIG. 3A is a schematic diagram showing a planar shape of the clad plate 122, and parallel four sides in a plan view having a width narrower than the width of one side surface (the upper surface in FIG. 15) to which the protection circuit board 34 of the battery case 11 is attached. It has a plate-like outer shape. The planar shape of the clad plate 122 shown in FIG. 3A is not line symmetric in any of the length direction and the width direction. Accordingly, the clad plate 122 has different shapes on the front and back sides, and even if the clad plate 122 is rotated on a plane with the front and back reversed, the clad plate 122 cannot have the same shape as the state where the front and back are not reversed.

  FIG. 3B is a schematic view showing a side surface of the clad plate 122. The clad plate 122 has a two-layer structure, and the surface of one layer 122a is welded to the battery case 11, and the surface of the other layer 122b is welded to the positive electrode lead plate 20, whereby the positive electrode lead plate 20 is attached to the battery case 11. Is fixed in the same manner as the conventional example shown in FIG. 16 and the example of the present invention shown in FIG.

  4 is a schematic external perspective view showing a state in which the clad plate 122 shown in FIG. If the state shown in FIG. 4A is a state in which the clad plate 122 is normally welded to the battery case 11 (or placed for welding), the clad plate 122 is upside down. As shown in the schematic external perspective view of FIG. 4 (b), the normal case shown in FIG. 4 (a) is welded onto the battery case 11 (or placed for welding). Since the planar shape of the clad plate 122 is clearly different compared to the state, the front / back determination is facilitated.

  FIG. 5 is a schematic view showing still another example of the configuration of the clad plate used in the battery according to the present invention. In this example, the clad plate is denoted by reference numeral 123. FIG. 5A is a schematic diagram showing a planar shape of the clad plate 123, and is unequal in plan view with a width narrower than the width of one side surface (the upper surface in FIG. 15) to which the protective circuit board 34 of the battery case 11 is attached. It has a trapezoidal plate-like outer shape. The planar shape of the clad plate 123 shown in FIG. 5A is not line symmetric in any of the length direction and the width direction. Therefore, the clad plate 123 exhibits different shapes on the front and back sides, and even if the clad plate 123 is rotated on a plane with the front and back reversed, the clad plate 123 cannot have the same shape as the state where the front and back are not reversed.

  FIG. 5B is a schematic view showing a side surface of the clad plate 123. The clad plate 123 has a two-layer structure. The surface of one layer 123 a is welded to the battery case 11, and the surface of the other layer 123 b is welded to the positive electrode lead plate 20, whereby the positive electrode lead plate 20 is attached to the battery case 11. Is fixed in the same manner as the conventional example shown in FIG. 16 and the example of the present invention shown in FIGS.

  FIG. 6 is a schematic external perspective view showing a state in which the clad plate 123 shown in FIG. 5 is fixed to the battery case 11. If the state shown in FIG. 6A is a state in which the clad plate 123 is normally welded to the battery case 11 (or is placed for welding), the clad plate 123 is upside down. As shown in the schematic external perspective view of FIG. 6 (b), the normal case shown in FIG. 6 (a) is shown in FIG. Since the planar shape of the clad plate 123 is clearly different compared to the state, the front / back determination is facilitated.

  FIG. 7 is a schematic view showing still another example of the configuration of the clad plate used in the battery according to the present invention. In this example, the clad plate is indicated by reference numeral 124. FIG. 7A is a schematic diagram showing the planar shape of the clad plate 124, which is rectangular in plan view with a width narrower than the width of one side surface (the upper surface in FIG. 15) to which the protective circuit board 34 of the battery case 11 is attached. It has a plate-like outer shape with two opposite corners cut into a rectangular shape. The planar shape of the clad plate 124 shown in FIG. 7A is not line symmetric in any of the length direction and the width direction. Therefore, the clad plate 124 has different shapes on the front and back sides, and even if the clad plate 124 is rotated on a plane with the front and back reversed, the clad plate 124 cannot have the same shape as the state where the front and back are not reversed.

  FIG. 7B is a schematic diagram showing a side surface of the clad plate 124. The clad plate 124 has a two-layer structure. The surface of one layer 124 a is welded to the battery case 11, and the surface of the other layer 124 b is welded to the positive electrode lead plate 20, whereby the positive electrode lead plate 20 is attached to the battery case 11. Is fixed in the same manner as the conventional example shown in FIG. 16 and the example of the present invention shown in FIGS.

  FIG. 8 is a schematic external perspective view showing a state in which the clad plate 124 shown in FIG. 7 is fixed to the battery case 11. If the state shown in FIG. 8A is a state in which the clad plate 124 is normally welded to the battery case 11 (or placed for welding), the clad plate 124 is reversed. As shown in the schematic external perspective view of FIG. 8B, the normal case shown in FIG. 8A is obtained when the battery case 11 is welded (or placed for welding). Since the planar shape of the clad plate 124 is clearly different compared to the state, the front / back determination is facilitated.

  By the way, regarding the clad plates 122, 123, and 124 shown in FIGS. 3, 4, 5, 6, 7, and 8 in the above-described examples, a hoop-shaped, strip-shaped mother is used. It is possible to manufacture so-called chips from the material. This will be specifically described below.

  FIG. 9 is a schematic view for explaining a method of manufacturing a clad plate used in the battery according to the present invention. FIG. 9A is a schematic view for explaining a method of manufacturing the clad plate 122 shown in FIGS. 3 and 4 described above. A plurality of parallel cuts at a predetermined interval in a direction obliquely intersecting with the length direction of the base material 120 as shown by a broken line in FIG. Cut across the base material 120 at line 122c. As a result, the clad plate 122 whose parallelogram plane shape is shown in FIG. 3A is obtained as individual cut pieces without generating so-called chips.

  FIG. 9B is a schematic view for explaining a method of manufacturing the clad plate 123 shown in FIGS. 5 and 6 described above. A predetermined interval in a direction that obliquely intersects the length direction of the base material 120 as shown by a broken line in FIG. A plurality of cutting lines 123ca parallel to each other, and a plurality of cutting lines parallel to each other at a predetermined interval in a direction that obliquely intersects with the length direction of the base material 120 at an angle slightly smaller than the cutting line 123ca. Cut alternately with 123cb. Thereby, the clad plate 123 whose planar shape of the unequal leg trapezoid in FIG. 5A is obtained as individual cut pieces without generating so-called chips.

  FIG. 9C is a schematic diagram for explaining a method of manufacturing the clad plate 124 shown in FIGS. 7 and 8 described above. A base material 120 in which a clad material is formed into a hoop shape with a predetermined width is perpendicular from both ends of a part of the center line in the width direction of the base material 120 as indicated by a broken line in FIG. Is cut across the base material 120 at a plurality of cutting lines 124c having a predetermined interval. Thus, the clad plate 124 whose planar shape is shown in FIG. 7A is obtained as individual cut pieces without generating so-called chips.

  Needless to say, the planar shape of the clad plate is not limited to the shape described above, and various shapes are possible as long as the shape is not line-symmetric.

  Next, regarding the battery pack component of the present invention, the planar shape of the lead plate attached to the battery pack component and the shape of the entire battery pack component when it is attached to both surfaces will be described.

  In the battery pack component of the present invention, since the lead plate attached to the battery pack component is conventionally obtained by punching from a base metal plate, a “flash” protrudes on one side, and this “flash” is the lead. In order to solve the problem that after the battery pack component with the plate attached is assembled in the battery pack, the insulation tape is broken to cause insulation failure, it is easy to determine the front and back of the lead plate itself. The object is to make it easy to determine the front and back of a battery pack component as a whole in a state where lead plates are attached to the front and back of the main body of the component.

  FIG. 10A is a schematic diagram showing an example of the planar shape of the lead plate of the present invention. The lead plate 61 is not line-symmetrical but has a point-symmetric shape and a planar outer shape, and is obtained by punching from a metal plate base material. Accordingly, a “flash” is formed on one surface of the lead plate 61 as described in the “Background Art” section. In the following, the surface of the lead plate 61 where the “burrs” are formed is referred to as the back surface, and the surface where the “flash” is not formed is referred to as the front surface.

  FIG. 10B is a schematic diagram showing a state in which the lead plate 61 shown in FIG. Since the lead plate 61 is configured to have a planar shape that is not line-symmetric, the front surface (the surface from which the “flash” does not protrude) and the back surface (the surface from which the “flash” protrudes) are formed. Then, no matter what operation is performed on the plane, for example, even if it is rotated by 180 ° on the plane, it exhibits a clearly different shape that does not coincide with the shape of the surface shown in FIG.

  Therefore, it is easy to determine the front and back when attaching the lead plate 61 having a planar shape with an external shape that is not line-symmetric as shown in FIG. 10 to the front and back of the polyswitch 51 that is the main body of the battery pack component. is there. In addition, since the lead plate 61 shown in FIG. 10 has a point-symmetric outer shape in plan view, the lead plate 61 has the same shape when the state shown in FIG. 10A is rotated 180 degrees on the plane. It will be. Therefore, when the lead plate 61 is attached to the polyswitch 51, for example, the lead plate 61 may be rotated 180 degrees, so that the working efficiency is improved.

  It should be noted that even if one of the lead plates 61 and 62 is mistakenly attached to the polyswitch 51, it can be easily determined. 11A and 11B, the lead plate 61 having the shape shown in FIG. 10 and the lead plate 62 having the same shape are respectively attached to the front and back of the polyswitch 51 as the main body of the battery pack component. It is a typical perspective view which shows the external appearance of the battery pack component 50 of this invention. However, in FIGS. 11 (a) and 11 (b), the lead plates 61 and 62 both face the polyswitch 51 on the back side (the surface from which the “burr” protrudes), in other words, the two lead plates 61 are mutually connected. It is attached to the polyswitch 51 with the back surface facing to each other, and this state is the correct state.

  The planar shape of the battery pack component 50 shown in FIG. 11B has an external shape in which the lead plate 61 (62) is not line-symmetrical but point-symmetrical, and as a whole, is centered on the center line CL. Line symmetry.

  However, for example, if the front and back of the lead plate 62 on the back side of the polyswitch 51 are mistaken, as shown in FIGS. 11C and 11D, the lead plate 61 (62) is extended to the left and right. Since it exhibits a planar shape, the planar shape of the battery pack component 50 as a whole exhibits a shape that is not line-symmetric (but point-symmetric). Therefore, since the shape of the battery pack component 50 as a whole exhibits a shape that is clearly different from the normal state shown in FIG.

  In this way, the lead plate 61 attached to the surface of the polyswitch 51 is attached to the polyswitch 51 with the surface from which the burr protrudes facing the polyswitch 51 side (with the back side in the figure). The lead plate 62 attached to the back surface of the polyswitch 51 is also attached to the polyswitch 51 with the surface from which the burr protrudes facing the polyswitch 51 side (front side in the figure). Therefore, when such a battery pack component 50 of the present invention is accommodated in the outer case 30 together with the battery 10 similar to the conventional example, the “flash” of both the lead plates 61 and 62 is located on the inner side with the poly switch 51 interposed therebetween. Therefore, there is no possibility of breaking through the insulating tape and the like, and it is possible to prevent the cause of insulation failure.

  Next, taking the lead plate 61 (62) whose outer shape is shown in FIG. 10 as an example, such a lead plate 61 (62) is attached to the polyswitch 51 with the back surfaces facing each other. The ease of front / back determination of the battery pack component 50 will be described.

  FIG. 12 is a schematic diagram for explaining the ease of front / back determination of the battery pack component of the present invention having the configuration shown in FIG. 11 (a) and the ease of returning to the original state when the front / back is reversed. It is. Specifically, FIG. 12 (a) is the same diagram as FIG. 11 (b), in which the battery pack component 50 of the present invention is in a normal state, that is, the lead plates 61 and 62 are provided on both sides of the polyswitch 51, respectively. It is a schematic top view which shows the state attached so that the back surface (surface in which "burr" protrudes) was made to oppose. In this case, both the lead plates 61 and 62 themselves are not line symmetric (but point symmetric), but have the same shape. However, the polylines are symmetrical so that the center line (CL) of the polyswitch 51 is the center of symmetry. Since it is attached to the switch 51, the battery pack component 50 as a whole has an external shape that is line-symmetric but not point-symmetric.

  By the way, if the state shown in FIG. 12A is a normal state in which the battery pack component 50 of the present invention is mounted on the jig in the assembly process, the battery pack component 50 itself is mounted on the jig upside down. In such a case, the jig is mounted on the jig in the state shown in FIG. In this case, since the shapes of the end portions of both the lead plates 61 and 62 are clearly different from those in FIG. 12A, which is normal, the automatic determination by an operator's visual inspection, for example, using an optical sensor or the like is also possible. However, the front and back of the battery pack component 50 can be easily determined.

  In addition, in the example shown in FIG. 12B described above, in order to return the battery pack component 50 to the normal state, the battery pack component 50 itself is turned upside down, that is, turned upside down, as shown in FIG. It is not necessary to perform the operation shown. More specifically, when the battery pack component 50 shown in FIG. 12B, which is opposite to the normal state, is rotated, for example, by 180 °, the state shown in FIG. 12C is obtained. .

  That is, since the shape of both the lead plates 61 and 62 is point-symmetric, if the point-symmetrical center point (on the line-symmetrical center line) is rotated 180 degrees around the rotation center, the state shown in FIG. 12 (c), which is the same external shape as the state shown in FIG. 12 (a), which is a normal state. Accordingly, when the lead plates attached to both the front and back surfaces of the polyswitch 51 are configured in a point-symmetric outer shape but not line-symmetric, as shown in FIGS. 12 (a), 12 (b), and 12 (c). Even when the front and back of the battery pack component 50 are reversed, the battery pack component 50 can be returned to a normal state by simply rotating it 180 degrees on a plane without turning the front and back. It is clear that the work is easier than the case where the front and back of the battery pack component 50 are reversed (turned upside down), regardless of whether it is performed manually or by a mechanical operation. is there.

  Note that the planar shape of the lead plate 61 (62) is not limited to the shape shown in FIG. 10 described above, and various shapes are possible as long as they are not line-symmetric and point-symmetric. Not too long.

  For example, the shape of the clad plate of the present invention described above may be the planar shape of the outer shape shown in FIGS. 3A and 7A. Such a lead plate having the same shape as the clad plate shown in FIGS. 3A and 7A can of course be manufactured by punching a metal plate as in the prior art. Similarly to the plate, it is possible to manufacture by continuously cutting the hoop-shaped (strip-shaped) metal plate as the base material at an appropriate interval in the same manner as the method shown in FIGS. 9 (a) and (c). It is.

  13A and 13B show lead plates 611, 621, and 612 configured to have a planar shape having the same outer shape as that of the clad plate shown in FIGS. 3A and 7A described above. , 622 is a schematic perspective view showing a configuration example of the battery pack component 50 in which both sides of the polyswitch 51 are attached. FIG. 14 is a schematic diagram for explaining the ease of front / back determination of the battery pack component 50 having the configuration shown in FIG. 13 (b) and that it is easy to return to the original state when the front / back is reversed. It is a perspective view.

  In the example shown in FIG. 14 as well, the lead plate 612 is attached to one surface (front surface) of the polyswitch 51 and the lead plate 622 is attached to the other surface (back surface) as in the example shown in FIG. Both the lead plates 612 and 622 are configured in the same plane shape having a planar shape which is not line symmetric but point symmetric, and is line symmetric with respect to the center line (CL) of the polyswitch 51. It is attached to the front and back surfaces of the polyswitch 51 respectively.

  The lead plate 612 attached to the surface of the poly switch 51 is attached to the poly switch 51 with the surface from which the burr protrudes facing the poly switch 51 (with the back side in the figure). The lead plate 622 attached to the back surface of the switch 51 is also attached to the poly switch 51 with the surface from which the burr protrudes facing the poly switch 51 side (front side in the figure). This is the same as the example shown in FIG. Therefore, when such a battery pack component 50 of the present invention is accommodated in the outer case 30 together with the battery 10 similar to the conventional example, there is no possibility that the “flash” of both the lead plates 612 and 622 breaks through the insulating tape or the like. Therefore, as described above, it is possible to prevent the cause of insulation failure.

  By the way, if the state shown in FIG. 14 (a) is a normal state in which the battery pack component 50 of the present invention is mounted on the jig in the assembly process, the battery pack component is mounted on the jig upside down. In this case, the jig is mounted on the jig in a state as shown in FIG. In this case, since the shapes of the end portions of both the lead plates 612 and 622 are different from those in FIG. 14 (a), which is normal, even by visual inspection by an operator, for example, determination by an optical sensor, As described above, it can be easily determined that the front and back are reversed.

  However, in the example shown in FIG. 14B, the shape of both the lead plates 612 and 622 is point symmetric, so that the center point of the point symmetry (on the center line of line symmetry) is 180 degrees. When rotated, the planar shape shown in FIG. The state shown in FIG. 14C is the same as the state shown in FIG. 14A when the battery pack component 50 is normally mounted on the jig. Therefore, when the lead plates attached to the front and back surfaces of the polyswitch 51 are configured to have a clear and plain shape that is not line-symmetrical but point-symmetrical as described above, FIGS. 14 (a), 14 (b), ( As shown in c), the battery pack component 50 can be returned to a normal state by simply rotating it 180 degrees on a flat surface without being reversed (turned over). However, even if it is a case of mechanical operation, it is obvious that the work is easier than the case where the front and back of the battery pack component 50 are reversed (inverted).

  As described above, the lead plate attached to the polyswitch 51 of the battery pack component 50 only needs to have a planar shape that is not line-symmetrical but point-symmetrical, and is configured in various shapes other than those described above. It goes without saying that it is possible.

  Further, regardless of the shape of the lead plate itself, the outer shape of the battery pack component 50 as a whole is configured as the battery pack component 50, specifically, with the lead plates attached to both the front and back surfaces of the polyswitch 51. If the shape is line symmetric and not point symmetric, the same effect as described above can be obtained. For example, the clad plate material 121 shown in the schematic diagram of FIG. 1 (a) is configured in an outer shape that is neither line-symmetric nor point-symmetric, but the battery pack component 50 as a whole is formed even if such a lead plate is used. The external shape of the battery pack can be configured to have the same external shape as the battery pack component 50 shown in FIG.

  In this case, each lead plate has the same shape, but the lead plates punched out from the base material are combined and attached to both the front and back surfaces of the polyswitch 51 so that the surfaces from which the “burrs” protrude are opposed to each other. In this state, the lead plates can be attached to both the front and back surfaces of the polyswitch 51. Further, if the “burr” is deleted by polishing or the like, or manufactured by a method that does not cause “burr”, such as a laser cutting method, the lead plate having the same shape is reversed and both sides of the polyswitch 51 are reversed. You may make it attach to.

  Further, in the above-described embodiment, the battery pack component of the present invention is an example in which lead plates are attached to both the front and back surfaces of the polyswitch 51. However, the present invention is not limited to this. The present invention can be applied to any component having lead plates attached to both sides.

It is a schematic diagram which shows an example of a structure of the clad board used for the battery which concerns on this invention. It is a typical external appearance perspective view which shows the state which adhered the clad board shown in FIG. 1 to the battery case. It is a schematic diagram which shows the other example of a structure of the clad board used for the battery which concerns on this invention. FIG. 4 is a schematic external perspective view showing a state where the clad plate shown in FIG. 3 is fixed to a battery case. It is a schematic diagram which shows the further another example of a structure of the clad board used for the battery which concerns on this invention. It is a typical external appearance perspective view which shows the state which adhered the clad board shown in FIG. 5 to the battery case. It is a schematic diagram which shows the further another example of a structure of the clad board used for the battery which concerns on this invention. It is a typical external appearance perspective view which shows the state which adhered the clad board shown in FIG. 7 to the battery case. It is a schematic diagram for demonstrating the manufacturing method of the clad board used for the battery which concerns on this invention. It is a schematic diagram which shows the planar shape of the lead plate of this invention. It is a typical perspective view which shows the external appearance of the battery pack component of this invention which attached the lead board of the shape shown in FIG. 10 to the front and back of a main body, respectively. It is a schematic diagram for demonstrating the ease of the front-and-back determination of the battery pack component of this invention of the structure of this invention shown to Fig.11 (a), and returning easily to the original state when the front and back are reversed. FIG. 8 is a schematic perspective view showing a configuration example of a battery pack component of the present invention in which lead plates configured in the same shape as the clad plate shown in FIGS. 3A and 7A are attached to both surfaces of a polyswitch. is there. It is a schematic diagram for demonstrating the ease of the front-and-back determination of the battery pack component of this invention of the structure of this invention shown in FIG.13 (b), and returning easily to the original state when the front and back are reversed. It is a typical exploded perspective view which shows the general structural example of the conventional battery pack. It is a schematic diagram which shows the structural example of the clad plate shown by FIG. It is a schematic diagram for demonstrating the example of a structure of the battery pack component by which the several lead board was attached to the conventional polyswitch, and the reason which needs front and back determination. It is a typical sectional side view for demonstrating the conventional problem which exists in lead board itself.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Battery 11 Battery case 12 (121-124) Clad board 12a (121a-124a) One layer of a clad board 12b (121b-124b) The other layer of a clad board 122c-124c Cutting line 50 Battery pack components 51 Polyswitch 61 (611,612) Lead plate 62 (621,622) Lead plate

Claims (6)

A first metal battery case containing a power generation element; and a second metal current extraction lead plate for taking out current from the power generation element, wherein the first layer is fixed to the battery case, and the second layer is In the battery in which the lead plate for current extraction is fixed to the battery case by the clad plate fixed to the lead plate for current extraction,
The clad plate has an outer shape of a surface on the second layer side that becomes an outer surface when the first layer is fixed to the battery case, and a first surface that becomes an outer surface when the second layer is fixed to the battery case. A battery characterized in that the outer shape of the surface on the one-layer side does not coincide even when rotated on a plane. A first metal battery case containing the power generation element, a second metal current extraction lead plate for taking out current from the power generation element, a first layer is fixed to the battery case, and a second layer is the current Manufacturing by continuously cutting a band-shaped base material of the battery including the cladding plate for fixing the current extraction lead plate to the battery case by being fixed to the extraction lead plate In the way to
Crossing the base material in the width direction with a cutting line such that the outer shape of the surface on one side of each clad plate and the outer shape of the surface on the other side do not match even if rotated on a plane A method for producing a clad plate used for a battery, characterized by cutting. In the lead plate of the battery pack component that is provided in the battery pack component housed in the battery pack outer case together with the battery, and is attached to each of the front and back surfaces of the plate-shaped electronic component through which current flows between the front and back surfaces,
The outer shape of the surface facing the electronic component when attached to the electronic component and the outer shape of the surface not facing the electronic component do not match even when rotated on a plane, and are point-symmetric A lead plate for battery pack parts, characterized in that it is configured. In the battery pack parts that are attached to the front and back of the plate-like electronic parts that conduct current between the front and back surfaces, and are housed in the battery pack outer case together with the battery,
When the lead plate is attached to the electronic component, the outer shape of the surface facing the electronic component and the outer shape of the surface not facing the electronic component do not match even when rotated on a plane. And is configured point-symmetrically,
The battery pack component according to claim 1, wherein the lead plates are attached to the front and back surfaces of the electronic component in line symmetry with the one surface or the other surface facing each other. Lead plates are attached to the front and back sides of the plate-shaped electronic component that conducts current between the front and back surfaces, and the battery pack component lead plate housed in the battery pack outer case together with the battery is continuously formed with a strip-shaped base material. In the method of cutting and manufacturing,
The outer shape of the surface of one side of each lead plate and the outer shape of the surface of the other side do not coincide with each other on the plane, and the base material is crossed in the width direction by a cutting line that becomes a point-symmetric shape. And cutting the battery pack component lead plate. In the battery pack parts that are attached to the front and back of the plate-like electronic parts that conduct current between the front and back surfaces, and are housed in the battery pack outer case together with the battery,
When the lead plate is attached to each of the front and back surfaces of the electronic component, the outer shape of the planar shape is line symmetric and not point symmetric, so that the outer shapes of the front and back surfaces are different and are rotated on the plane. The battery pack component is configured so that the outer shape of the front surface and the outer shape of the back surface coincide with each other.

Images