JP2018028447A - Method of manufacturing jig for conductive foreign matter detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jib that allows for detecting conductive foreign matter attached to a metal bracket.SOLUTION: A conductive foreign matter detection device includes a jig. The jig has a plurality of recessed stripes partitioned by protruded stripes. Each of the recessed stripes has either of alternately arranged first and second wiring electrodes 42, 43 disposed thereon. The protruded stripes prevent the first and second wiring electrodes 42, 43 from touching a bracket. When conductive foreign matter is attached to the bracket, the first wiring electrodes 42 and the second wiring electrodes 43 are short-circuited by the conductive foreign matter that lies across the recessed stripes. A resistance detector measures resistance while the first wiring electrodes 42 and the second wiring electrodes 43 are being short-circuited by conductive foreign matter. The first and second wiring electrodes 42, 43 are formed through a plating process. The protruded stripes are formed by ink-jetting a liquid rubber material.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a method for manufacturing a jig for a conductive foreign matter detection device.

  A power storage device module obtained by modularizing a plurality of power storage devices includes a metal bracket for restraining the plurality of power storage devices. In the power storage device module, there is a possibility that conductive foreign matters generated by metal processing for manufacturing the metal bracket are attached to the metal bracket. If the conductive foreign matter attached to the bracket is detached from the bracket and attached to the power storage device, it causes a short circuit. For this reason, it is desired to detect conductive foreign matter adhering to the bracket.

  For example, Patent Document 1 discloses a conductive foreign matter detection apparatus that detects conductive foreign matter. The conductive foreign matter detection device described in Patent Document 1 detects and collects needle-like conductive foreign matter that has fallen on the floor. The conductive foreign object detection device includes a jig and a detection unit. The jig includes a permanent magnet laminate, an insulating holding part, and a first wiring electrode and a second wiring electrode arranged on the holding part. As an example of the jig, a tape-shaped film member on which a first wiring electrode and a second wiring electrode are formed is wound around an outer peripheral surface of a cylindrical casing. A potential difference is generated between the first wiring electrode and the second wiring electrode. When the conductive foreign matter is attracted to the holding portion by the magnetic force of the permanent magnet laminate, the first wiring electrode and the second wiring electrode are short-circuited by the conductive foreign matter. The detection unit can detect the conductive foreign matter based on a current change caused by a short circuit.

JP 2013-230456 A

  By the way, when the holding portion is brought into contact with the metal bracket, the first wiring electrode and the second wiring electrode are short-circuited by the bracket. Since the first wiring electrode and the second wiring electrode are short-circuited regardless of the presence or absence of the conductive foreign matter, the conductive foreign matter cannot be detected. In addition, it is desired that the conductive foreign matter detection apparatus can detect fine conductive foreign matter.

  The objective of this invention is providing the manufacturing method of the jig | tool of the electroconductive foreign material detection apparatus which can manufacture the jig | tool which can detect the electroconductive foreign material adhering to metal brackets.

  A method for manufacturing a jig for a conductive foreign matter detection device that solves the above-described problem includes a jig that is pressed against a metal bracket that holds and constrains a plurality of power storage devices arranged side by side from both sides in a parallel arrangement direction, The jig is partitioned between an insulating substrate, a plurality of rubber protrusions arranged in parallel with each other along a surface of the insulating substrate, and the protrusions adjacent to each other along the surface. And the first wiring electrode and the second wiring electrode arranged alternately so as to have different polarities in the concave strip adjacent in the direction along the surface, the first wiring electrode and the first wiring electrode A method of manufacturing a jig for a conductive foreign matter detecting device for manufacturing the jig used in the conductive foreign matter detecting device in which the protrusion protrudes from a second wiring electrode, wherein the insulating substrate is plated by the first step. Form one wiring electrode and the second wiring electrode Including that a step, and a step of forming the protrusion by discharging the rubber material of the liquid by the liquid ejection method in the composed portion between the second wiring electrode and the first wiring electrode.

  According to this, the 1st wiring electrode and the 2nd wiring electrode, and a bracket do not contact only by touching the tip of a rubber protrusion on a bracket. When the jig is pressed toward the bracket, the protrusions are crushed and the first wiring electrode and the second wiring electrode approach the bracket. When the conductive foreign matter is not attached to the bracket, the first wiring electrode and the second wiring electrode do not short-circuit. On the other hand, when the conductive foreign matter adheres to the bracket, the first electrode wiring and the second electrode wiring are connected across the adjacent recesses by the conductive foreign matter, and the first wiring electrode and the second wiring electrode are connected. Is short-circuited. When the first wiring electrode and the second wiring electrode are short-circuited, the electrical value changes. Thereby, a conductive foreign material can be detected. By the protrusions, it is possible to detect the conductive foreign matter attached to the metal bracket while preventing the first wiring electrode and the second wiring electrode from being short-circuited by the bracket.

  For manufacturing such a jig, the first wiring electrode and the second wiring electrode are formed by plating. By forming the first wiring electrode and the second wiring electrode by plating, the width of the first wiring electrode and the second wiring electrode and the distance between the wirings of the first wiring electrode and the second wiring electrode can be reduced. it can. For this reason, for example, it is possible to detect even fine conductive foreign matters of less than 100 μm. Further, the protrusions can be narrowed by the liquid discharge method, and the space between the protrusions can be narrowed.

  About the manufacturing method of the jig | tool of the said conductive foreign material detection apparatus, the width | variety of the said 1st wiring electrode and the said 2nd wiring electrode is less than 10 micrometers, and performs an ozone process to the said insulated substrate before performing the said plating process. A process may be included.

  If the width of the first wiring electrode and the second wiring electrode is narrowed to be less than 10 μm in order to detect fine conductive foreign matter, the contact area between the first wiring electrode and the second wiring electrode and the insulating substrate is reduced. , Adhesion is weakened. By performing the ozone treatment, the surface modification of the insulating substrate can be performed, so that the adhesion between the first wiring electrode and the second wiring electrode and the insulating substrate can be increased. For this reason, even if the width of the first wiring electrode and the second wiring electrode is less than 10 μm, the adhesion between the first wiring electrode and the second wiring electrode and the insulating substrate can be maintained.

  ADVANTAGE OF THE INVENTION According to this invention, the jig | tool which can detect the conductive foreign material adhering to metal brackets can be manufactured.

The perspective view which shows a battery module. The schematic block diagram of an electroconductive foreign material detection apparatus. The perspective view which shows a jig | tool and a bracket. The top view which shows the state which accumulated the jig | tool on the bracket. (A) is sectional drawing which shows a jig | tool, (b) is sectional drawing which shows the jig | tool pressed on the bracket with which the electroconductive foreign material has not adhered. (A) is sectional drawing which shows the jig | tool before being pressed on the bracket with which the conductive foreign material adhered, (b) is sectional drawing which shows the jig | tool pressed against the bracket with which the conductive foreign material adhered. Schematic which shows the manufacturing process of a jig | tool. Schematic which shows the manufacturing process of a jig | tool. Schematic which shows the manufacturing process of a jig | tool.

Hereinafter, an embodiment of a method for manufacturing a jig for a conductive foreign matter detection device will be described.
As shown in FIG. 1, the battery module 10 includes a plurality of battery cells 11 and individual battery holders 12 that hold the battery cells 11. Each battery cell 11 is juxtaposed while being held by the battery holder 12. The battery cell 11 of this embodiment is a square battery and a secondary battery. In the present embodiment, the battery cell 11 is used as the power storage device, but the power storage device may be a capacitor.

  The battery cell 11 includes a positive electrode terminal 13 and a negative electrode terminal 14. The battery cells 11 adjacent to each other in the direction in which the battery cells 11 are arranged are arranged such that the positive electrode terminal 13 and the negative electrode terminal 14 are adjacent to each other. The battery module 10 includes a bus bar 15 that connects the positive electrode terminal 13 and the negative electrode terminal 14. In the present embodiment, the plurality of battery cells 11 are connected in series by the bus bar 15. Note that a plurality of battery cells 11 may be connected in parallel by using a bus bar that connects the positive terminals 13 and the negative terminals 14 together.

  The battery module 10 includes two brackets 16 and 17. The brackets 16 and 17 are provided on both sides of the battery cells 11 in the juxtaposition direction. All the battery cells 11 are sandwiched by the two brackets 16 and 17 from both sides in the juxtaposed direction. Each bracket 16 and 17 is made of metal.

  One of the two brackets 16 and 17 is a first bracket 16 and the other is a second bracket 17. The first bracket 16 includes a rectangular plate-shaped main body 21. The direction along the short sides 22 and 23 on the surface of the main body 21 in the plate thickness direction is the short direction of the main body 21, and the direction along the long sides 24 and 25 is the long direction of the main body 21.

  As shown in FIGS. 1 and 3, the first bracket 16 includes a rectangular plate-shaped fixing portion 26 that intersects the main body 21 at a right angle at one end in the longitudinal direction of the main body 21. The fixing part 26 has a plurality of fixing holes 27.

  The first bracket 16 includes a plurality of (three in this embodiment) ribs 31 welded to the main body 21. The rib 31 is provided on a surface 21 a located in the same direction as the direction in which the fixing portion 26 extends, among the surfaces in the plate thickness direction of the main body 21. The ribs 31 are arranged in the lateral direction of the main body 21. Each rib 31 extends in the longitudinal direction of the main body 21. The rib 31 extends from one short side 22 to an intermediate position toward the other short side 23. The rib 31 is plate-shaped, and the thickness direction of the rib 31 coincides with the short direction of the main body 21. The rib 31 improves the strength against the force applied to the first bracket 16 due to the expansion of the battery cell 11 accompanying the charging / discharging of the battery cell 11.

The first bracket 16 includes projecting portions 32 that project from the long sides 24 and 25 of the main body 21 by two. Each protrusion 32 includes a through hole 33.
The fixing portion 26 of the second bracket 17 extends in the direction opposite to the first bracket 16 in the thickness direction of the main body 21. The second bracket 17 has the same structure as that of the first bracket 16 except that the direction in which the fixing portion 26 extends is different from that of the first bracket 16. For this reason, detailed description of the second bracket 17 is omitted.

  The battery module 10 includes a restraining bolt 34 that applies a restraining load to the brackets 16 and 17. The restraining bolts 34 are inserted from the through holes 33 of the first bracket 16 into the through holes 33 of the second bracket 17. A nut 35 is screwed onto the restraining bolt 34. A restraining force acting on the brackets 16 and 17 from the head of the restraining bolt 34 and the nut 35 in a direction approaching each other acts. Thereby, the some battery cell 11 is restrained in the parallel arrangement direction, and is modularized. Therefore, each bracket 16 and 17 has a function of restraining the battery cell 11 and modularizing it.

  A bolt (not shown) is inserted into the fixing hole 27. The bolt is screwed to a mounting target on which the battery module 10 is mounted, such as a wall portion of a case of a battery pack on which a plurality of battery modules 10 are mounted. Thereby, the battery module 10 is fixed to mounting object. Therefore, each bracket 16 and 17 has a function of fixing the battery module 10 to the mounting target.

  The brackets 16 and 17 of the battery module 10 may be attached with conductive foreign matters generated in the manufacturing stage of the brackets 16 and 17. Examples of the conductive foreign material include spatter generated when the ribs 31 are welded, burrs generated when the fixing holes 27 and the through holes 33 are formed, and burrs that have been removed. When the conductive foreign matter is separated from the brackets 16 and 17 and adheres to the battery cell 11, the battery cell 11 is short-circuited. Here, the short circuit means a short circuit between the positive electrode terminal 13 or the negative electrode terminal 14 of the battery cell 11 and the case of the battery cell 11 or a short circuit between the battery cell 11 and the bus bar outside the battery cell 11. . For this reason, the conductive foreign matter adhering to the brackets 16 and 17 is detected using the following conductive foreign matter detection device.

  As shown in FIG. 2, the conductive foreign object detection device 40 includes a jig 41 and a detection unit 71. The jig 41 includes first and second wiring electrodes 42 and 43 having different polarities, a first connection line 44 that connects the first wiring electrodes 42, and a second connection that connects the second wiring electrodes 43. A wire 45 and a holder 50 for holding the first wiring electrode 42 and the second wiring electrode 43 are provided. The detection unit 71 includes a power source 72 and a resistance detector 73. The detection unit 71 detects that the first wiring electrode 42 and the second wiring electrode 43 arranged in the holder 50 in a non-contact manner are short-circuited by the conductive foreign matter. In FIG. 2, the distance between the first wiring electrode 42 and the second wiring electrode 43 is deformed and enlarged in an easily understandable manner, and the actual distance is extremely narrow as will be described later.

  As shown in FIGS. 3 and 4, the holder 50 includes a plate-like insulating substrate 51. As the insulating substrate 51, for example, a glass epoxy substrate is used. Further, as the insulating substrate 51, a substrate made of a mixture of a thermoplastic resin and a thermosetting resin can be used. Examples of the thermosetting resin include an epoxy resin, a phenol resin, a melamine resin, a urea resin, and an unsaturated polyester resin. Thermoplastic resins include polyethylene resin, polypropylene, polystyrene, ABS, AS, polyacetal resin, polyester resin, polyether resin, polyimide resin, polyamideimide resin, polyetherimide resin, polysulfone resin, polyethersulfone resin, polyphenylene ether resin, Examples include polycarbonate resin, polyether ether ketone resin, and polyester resin.

  An inorganic filler may be added to the insulating substrate 51. Inorganic fillers include silica, alumina, barium sulfate, talc, clay, mica powder, aluminum hydroxide, magnesium hydroxide, calcium carbonate, magnesium carbonate, magnesium oxide, boron nitride, aluminum borate, barium titanate, titanate Examples include strontium, calcium titanate, magnesium titanate, bismuth titanate, titanium oxide, barium zirconate, and calcium zirconate.

Furthermore, in addition to the above components, the insulating substrate 51 may contain various additives as necessary as long as the effects of the present invention are not impaired.
Of the directions along the surface 51a in the plate thickness direction of the insulating substrate 51, one direction is defined as a first direction, and a direction orthogonal to the first direction is defined as a second direction. The insulating substrate 51 includes a plurality of cutouts 53 extending in the first direction and arranged in the second direction. The insulating substrate 51 includes juxtaposed portions 57 on both sides of the notch 53. The dimension of the notch 53 in the second direction is longer than the thickness of the rib 31. For example, the dimension in the second direction of the notch 53 is slightly larger than the dimension obtained by adding the width of the bead (the dimension in the short direction of the main body 21) generated by welding the rib 31 to the thickness of the rib 31. The same number of notches 53 as the ribs 31 are provided. In the present embodiment, three notches 53 are provided.

  As shown in FIG. 5A, the holder 50 includes a plurality of protrusions 59 on one surface 51 a of the surfaces of the insulating substrate 51 in the plate thickness direction. Each protrusion 59 is arranged in parallel to each other in the direction along one surface 51 a of the insulating substrate 51. In the present embodiment, the protrusions 59 are arranged in parallel to each other in the second direction, and extend in the first direction over the entire insulating substrate 51. For convenience of explanation, the protrusion 59 is omitted in FIG.

  The ridge 59 is made of rubber. As rubber which comprises the protrusion 59, hard rubbers, such as a nitrile rubber, are used, for example. Even if it is other than nitrile rubber, "Durometer" based on the new JIS standard (JIS K6253-3: 2012 vulcanized rubber and thermoplastic rubber-Determination of hardness-Part 3: Durometer hardness) is used for measuring instruments If the rubber hardness measured by the conventional method is durometer hardness 60-90, it can be used. If the durometer hardness is less than 60, the protrusion 59 is worn with repeated detection of the conductive foreign matter, and even if there is no conductive foreign matter, the wire-like first wiring electrode 42 and the second wiring electrode 43 are used. May be in direct contact with the brackets 16 and 17 and erroneously detected. If the durometer hardness exceeds 90, even if the jig 41 is pressed against the brackets 16 and 17, the protrusion 59 may not be crushed by the pressure applied to the jig 41, and there is a possibility that conductive foreign matter cannot be detected. It is more preferable to use a rubber having a durometer hardness of 80 to 90. Examples of rubbers other than nitrile rubber include styrene butadiene rubber and silicon rubber.

  The holder 50 includes a recess 60 that is partitioned between adjacent protrusions 59. One of the first wiring electrode 42 and the second wiring electrode 43 is disposed on each concave line 60. The first wiring electrode 42 and the second wiring electrode 43 are plated wiring (for example, copper foil) formed by plating. The first wiring electrode 42 and the second wiring electrode 43 are in close contact with the insulating substrate 51. The jig 41 of this embodiment can be said to be a circuit board obtained by patterning the first wiring electrode 42 and the second wiring electrode 43 on the insulating substrate 51.

  In the groove 60 adjacent in the second direction, the first wiring electrodes 42 and the second wiring electrodes 43 are alternately arranged so that the polarities are different. Thereby, the first wiring electrode 42 and the second wiring electrode 43 are adjacent to each other. The 1st wiring electrode 42 and the 2nd wiring electrode 43 are electrically insulated by arrange | positioning without contact. The protrusion 59 protrudes from the first wiring electrode 42 and the second wiring electrode 43.

  The inter-wiring distance, which is the distance between the first wiring electrode 42 and the second wiring electrode 43 (the dimension between the first wiring electrode 42 and the second wiring electrode 43), is the size (grain size) of the conductive foreign matter to be detected. It is set as appropriate according to the diameter. Similarly, the width of the first wiring electrode 42 and the second wiring electrode 43 (the shorter dimension of the wiring electrodes in the direction along the surface 51a of the insulating substrate 51) is also the size of the conductive foreign matter to be detected (grain size). It is set as appropriate according to the diameter. In the present embodiment, the inter-wiring distance and the widths of the first wiring electrode 42 and the second wiring electrode 43 are set to 1 μm or more and less than 10 μm. The size of the conductive foreign matter to be detected is the size of the conductive foreign matter that can cause a short circuit of the battery cell 11. The conductive foreign object detection device 40 of the present embodiment detects conductive foreign substances having a size of 1 μm or more and less than 10 μm.

  As shown in FIG. 2, the plurality of first wiring electrodes 42 are connected by a first connection line 44. The plurality of second wiring electrodes 43 are connected by a second connection line 45. The first connection line 44 and the second connection line 45 are, for example, metal foil provided on the surface 51 a of the insulating substrate 51.

  The first connection line 44 and the second connection line 45 are electrically connected to a resistance detector 73 and a power source 72 as measuring instruments, respectively. The power source 72 is electrically connected to the first wiring electrode 42 and the second wiring electrode 43, thereby constituting a measurement circuit including the first wiring electrode 42, the second wiring electrode 43, and the resistance detector 73. The power source 72 can apply a predetermined constant voltage between the first wiring electrode 42 and the second wiring electrode 43. The resistance detector 73 outputs the measured resistance value to the control device 80.

  As shown in FIG. 4, when detecting whether or not conductive foreign matter is attached to the brackets 16 and 17, the jig 41 is first positioned. The jig 41 is arranged so that the protrusion 59 contacts the surface 21 a of the brackets 16 and 17. The jig 41 is positioned so that the rib 31 is positioned in the notch 53. Thereby, the surface 21 a provided with the rib 31 of the main body 21 is covered with the jig 41 except for a part of the periphery of the rib 31 and a part of the periphery of the fixing portion 26.

  Next, the jig 41 is pressed against the brackets 16 and 17. The protrusion 59 is crushed by the pressure applied to the jig 41. Note that the pressurization of the jig 41 may be performed automatically by a pressurizing device or may be performed manually.

  As shown in FIG. 5B, even if the protrusion 59 is crushed, the first wiring electrode 42 and the second wiring electrode 43 are in the recess 60 and do not protrude from the protrusion 59. At least one of the rubber hardness of the protrusion 59, the height of the first wiring electrode 42 and the second wiring electrode 43, the depth of the recess 60 (the height of the protrusion 59), and the pressure applied to the jig 41 is The first wiring electrode 42 and the second wiring electrode 43 are set so as not to protrude from the recess 60 when the jig 41 is pressed against the brackets 16 and 17.

  The first wiring electrode 42 and the second wiring electrode 43 are not in contact with the brackets 16 and 17 by the protrusion 59. For this reason, when the conductive foreign matter is not attached to the brackets 16 and 17, the first wiring electrode 42 and the second wiring electrode 43 are maintained in an insulated state. When the first wiring electrode 42 and the second wiring electrode 43 are insulated, the resistance value detected by the resistance detector 73 is infinite.

  As shown in FIG. 6A, when conductive foreign matter (F in the figure) adheres to the brackets 16 and 17, the conductive foreign matter straddles the adjacent recess 60. When the jig 41 is pressed against the brackets 16 and 17 in this state, the first wiring electrode 42 and the second wiring electrode 43 are short-circuited by the conductive foreign matter as shown in FIG. When the first wiring electrode 42 and the second wiring electrode 43 are short-circuited due to the conductive foreign matter, the resistance value detected by the resistance detector 73 decreases.

When the control device 80 detects a decrease in the resistance value, it determines that the conductive foreign matter is attached to the brackets 16 and 17. Thereby, a conductive foreign material is detected.
Next, a method for manufacturing the jig 41 will be described.

  First, as illustrated in FIG. 7, the surface modification of the insulating substrate 51 is performed by performing ozone treatment (ultraviolet ozone treatment) on the insulating substrate 51. The ozone treatment is performed by irradiating the surface 51 a of the insulating substrate 51 with ultraviolet rays from the ultraviolet irradiation device 61. When the insulating substrate 51 is irradiated with ultraviolet rays, the molecular bond is cut and a new functional group is formed on the surface 51a. By forming these functional groups, surface modification of the insulating substrate 51 is performed.

  Next, as shown in FIG. 8, the first wiring electrode 42 and the second wiring electrode 43 are formed on the insulating substrate 51 by plating. As the plating treatment, an additive method is used. More specifically, a portion of the surface of the insulating substrate 51 where the first wiring electrode 42 and the second wiring electrode 43 are not provided is masked with a resist 62 and subjected to electroless plating, whereby the surface of the insulating substrate 51 is obtained. A first wiring electrode 42 and a second wiring electrode 43 are formed on 51a.

  The electroless plating process is performed by immersing the insulating substrate 51 in a plating solution 63 containing a metal salt and a reducing agent. As a result, the first wiring electrode 42 and the second wiring electrode 43 are formed in a portion that is not masked by the resist 62.

  Next, as shown in FIG. 9, a protrusion 59 is formed between the first wiring electrode 42 and the second wiring electrode 43. The protrusion 59 is formed by an ink jet method as a liquid discharge method. More specifically, the volume of the reservoir 64 that stores the liquid rubber material before curing is changed by the piezoelectric element 65, thereby discharging the liquid rubber material before curing from the nozzle 66. When the rubber is cured, the protrusion 59 is formed, and the jig 41 is manufactured.

Therefore, according to the above embodiment, the following effects can be obtained.
(1) The jig 41 includes a plurality of concave stripes 60 partitioned by the protrusions 59. In each recess 60, the first wiring electrode 42 or the second wiring electrode 43 is arranged. The contact of the first wiring electrode 42 and the second wiring electrode 43 with the brackets 16 and 17 is prevented by the protrusions 59 simply by applying the jig 41 to the brackets 16 and 17. When conductive foreign matter adheres to the brackets 16 and 17, the first wiring electrode 42 and the second wiring electrode 43 are short-circuited by the conductive foreign matter straddling the plurality of recesses 60. 16 and 17 conductive foreign matters can be detected.

  Regarding the manufacture of the jig 41, the first wiring electrode 42 and the second wiring electrode 43 are formed by plating, so that the tape-like film member on which the first wiring electrode and the second wiring electrode are formed is formed into a cylindrical shape. The widths of the first wiring electrode 42 and the second wiring electrode 43 can be made narrower than in the case of winding around the outer peripheral surface of the housing. In addition, the distance between the first wiring electrode 42 and the second wiring electrode 43 can be shortened. For this reason, even fine conductive foreign matters of less than 100 μm (less than 10 μm in this embodiment) can be detected. Further, by forming the protrusions 59 by the ink jet method, the protrusions 59 can be made thin, and the space between the protrusions can be reduced.

  (2) The insulating substrate 51 is subjected to ozone treatment. If the widths of the first wiring electrode 42 and the second wiring electrode 43 are reduced to less than 10 μm, the contact area between the first wiring electrode 42 and the second wiring electrode 43 is reduced, and the anchor effect is less likely to occur. As a result, the adhesion between the insulating substrate 51 and the first wiring electrode 42 and the second wiring electrode 43 is weakened. By performing ozone treatment and modifying the surface of the insulating substrate 51, the adhesion between the first wiring electrode 42 and the second wiring electrode 43 and the insulating substrate 51 can be increased. For this reason, even if the width of the first wiring electrode 42 and the second wiring electrode 43 is less than 10 μm, the close contact between the first wiring electrode 42 and the second wiring electrode 43 and the insulating substrate 51 can be maintained.

  (3) Since the protrusions 59 are in contact with metal conductive foreign matter, the protrusions 59 are likely to be worn when the protrusions 59 are made of soft rubber. Moreover, there is a possibility that the conductive foreign matter may sink into the ridge 59. As a result, the jig 41 cannot be used for a long time. By making the protrusion 59 from hard rubber, the jig 41 can be used over a long period of time.

  (4) As an apparatus for detecting conductive foreign matter attached to the brackets 16 and 17, an apparatus using an imaging device such as a CCD camera is known. When detecting a conductive foreign material using an imaging device, the presence or absence of the conductive foreign material is inspected from an image captured by the imaging device. In the imaging apparatus, when shooting is performed at a magnification that can detect burrs, only an image in a narrow range can be acquired at a time. Therefore, it is necessary to move the imaging apparatus and acquire images at a plurality of locations. Further, in the vicinity of the rib 31, it is necessary to move the imaging device away from the rib 31, and it is necessary to adjust the depth of focus of the imaging device each time. As a result, it takes a long time to detect the conductive foreign matter.

  By pressing the jig 41 against the surfaces 21a of the brackets 16 and 17 as in the present embodiment, it is possible to inspect the presence or absence of conductive foreign matter at a portion that contacts the jig 41. Therefore, the presence / absence of conductive foreign matter can be inspected in a shorter time compared to the case where conductive foreign matter is detected from an image captured by the imaging device.

In addition, you may change embodiment as follows.
The protrusion 59 may be formed before the first wiring electrode 42 and the second wiring electrode 43 are formed, and the first wiring electrode 42 and the second wiring electrode 43 may be formed between the protrusions 59.

○ The plating treatment may be performed using a semi-additive method or the like.
The surface modification of the insulating substrate 51 may be performed by manganese peroxide treatment instead of ozone treatment. The manganese peroxide treatment is preferably performed when the width of the first wiring electrode 42 and the second wiring electrode 43 is 10 μm or more and less than 100 m.

If the adhesion between the first wiring electrode 42 and the second wiring electrode 43 and the insulating substrate 51 can be maintained, the surface modification of the insulating substrate 51 may not be performed.
○ The liquid ejection method is not limited to the inkjet method. For example, a liquid rubber material may be discharged using a dispenser or the like.

  ○ Although the conductive foreign matter was detected on the surface 21a of the main body 21 provided with the ribs 31 among the plurality of surfaces of the brackets 16 and 17, the thickness of the main body 21 was changed by changing the shape of the jig 41. Among the directional surfaces, the conductive foreign matter can be detected also on the surface where the ribs 31 are not provided.

  Each protrusion 59 may be arranged in any direction as long as it is a direction along the surface of the insulating substrate 51 in the thickness direction. For example, the protrusions 59 may be arranged in parallel to each other in the first direction.

As the measuring instrument, an ammeter that measures a current value as an electrical numerical value may be used. As the measuring instrument, a voltmeter that measures a voltage as an electrical numerical value may be used.
The brackets 16 and 17 may have any shape as long as the brackets 16 and 17 have a function of restraining the battery cell 11 to be modularized. For example, the brackets 16 and 17 may have a shape that does not include the ribs 31 or may have a shape that does not include the fixing portion 26. The shape of the jig 41 is appropriately changed according to the shapes of the brackets 16 and 17.

As rubber, rubber hardness other than durometer hardness of 60 to 90 may be used.
A pedestal may be provided on the surface of the insulating substrate 51 in the thickness direction opposite to the surface 51a on which the protrusions 59 are provided.

  In the conductive foreign matter detection method using the conductive foreign matter detection device of the above embodiment, a plurality of conductive foreign matter detection devices may be combined to detect conductive foreign matter. For example, a conductive foreign matter detecting apparatus suitable for detecting conductive foreign matters having a particle size of 1 μm or more and less than 10 μm is obtained by performing surface modification by ozone treatment. As described above, detection can also be performed in combination with a conductive foreign matter detection apparatus suitable for detecting conductive foreign matters of less than 100 μm. The widths of the wirings of the first wiring electrode and the second wiring electrode of the conductive foreign matter detection device need to be changed according to the assumed particle size of the conductive foreign matter together with the distance between the wirings. If the wiring is thin, in addition to the conductive foreign material having a small particle size, a conductive foreign material having a large particle size can be detected. On the other hand, if the wiring is thin, the strength of the wiring is reduced. Detection of sexual foreign matter is likely to cause damage such as disconnection. Therefore, after conducting a detection using a conductive foreign matter detection device corresponding to a conductive foreign matter having a larger particle size and confirming that there is no conductive foreign matter having a larger particle size, a foreign matter having a smaller particle size is detected. Such inconvenience can be avoided by using a conductivity detection device that assumes the above.

  DESCRIPTION OF SYMBOLS 11 ... Battery cell (electric storage apparatus) 16, 17 ... Bracket, 40 ... Conductive foreign material detection apparatus, 41 ... Jig, 42 ... 1st wiring electrode, 43 ... 2nd wiring electrode, 51 ... Insulating substrate, 59 ... Projection 60, concave stripes, 71, detector, 72, power source, 73, resistance detector (measuring instrument).

Claims (2)

A jig that is pressed against a metal bracket that holds and constrains a plurality of power storage devices arranged side by side from both sides of the side by side,
The jig is
An insulating substrate;
A plurality of rubber protrusions arranged in parallel to each other in a direction along one surface of the insulating substrate;
A concave line defined between the protrusions adjacent in the direction along the surface;
A first wiring electrode and a second wiring electrode, which are alternately arranged so as to have different polarities, in the concave stripes adjacent to each other in the direction along the surface, from the first wiring electrode and the second wiring electrode; A method of manufacturing a jig for a conductive foreign matter detection device for manufacturing the jig used in the conductive foreign matter detection device from which the protrusion protrudes,
Forming the first wiring electrode and the second wiring electrode by plating on the insulating substrate;
A step of forming a protrusion by discharging a liquid rubber material by a liquid discharge method to a portion between the first wiring electrode and the second wiring electrode. Production method. The width of the first wiring electrode and the second wiring electrode is less than 10 μm,
The manufacturing method of the jig | tool of the electroconductive foreign material detection apparatus of Claim 1 including the process of performing ozone treatment to the said insulated substrate before performing the said plating process.

Images