Inspection system and inspection method

Abstract

This invention provides an inspection system and method that enable simple and efficient short-circuit and continuity testing of printed circuit boards. [Solution] The inspection system 1 of the embodiment is an inspection system for performing short-circuit and continuity tests on a flexible printed circuit board 300, wherein the flexible printed circuit board 300 includes a plurality of wiring sections, each wiring section having a terminal 310, a terminal 320, and wiring 330 that electrically connects terminals 310 and 320, and the inspection jig 11 has a plurality of probes 112 that can contact the terminals 310 of the plurality of wiring sections, and a short-circuit jig 12 configured separately from the inspection jig 11, which has a first probe and a second probe that are electrically connected to each other, and the first probe and the second probe can contact adjacent terminals 320 of the flexible printed circuit board 300, respectively.

Description

Technical Field

[0001] The present invention relates to an inspection system and an inspection method, and more particularly to an inspection system and an inspection method for performing a short-circuit inspection and a continuity inspection of a printed wiring board.

Background Art

[0002] Short-circuit inspections and continuity inspections are performed on printed wiring boards such as flexible printed wiring boards. In the short-circuit inspection, it is inspected whether there is a short between wirings, and in the continuity inspection, it is inspected whether there is an open circuit in the wiring.

[0003] Specifically, in the short-circuit inspection, the probes of the inspection jig are respectively brought into contact with the terminals of adjacent wirings, and the presence or absence of a short is determined by measuring the resistance between the terminals. In the continuity inspection, the probes of the inspection jig are respectively brought into contact with both ends of each wiring, and the presence or absence of an open circuit is determined by measuring the resistance between the terminals.

[0004] Patent Document 1 discloses an inspection method for efficiently and quickly performing a continuity inspection of a printed wiring board using a movable probe.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] An object of the present invention is to provide an inspection system and an inspection method capable of simply and efficiently performing a short-circuit inspection and a continuity inspection of a printed wiring board. However, the present invention is not limited to this object, and an object corresponding to the effects of the configuration of the embodiments described below may also be an object of the present invention.

Means for Solving the Problems

[0007] An inspection system according to one aspect of the present invention is an inspection system for performing short-circuit testing and continuity testing of a printed circuit board, The printed circuit board includes a plurality of wiring sections, each of which has a first terminal, a second terminal, and wiring that electrically connects the first terminal and the second terminal. An inspection jig having a plurality of probes that can contact each of the first terminals of the plurality of wiring sections, The shorting jig, which is configured separately from the inspection jig, has a first probe and a second probe that are electrically connected to each other, and the first probe and the second probe are each capable of contacting adjacent second terminals of the printed circuit board.

[0008] Furthermore, in the inspection system, When performing a short-circuit test, a control unit controls the test jig to bring the plurality of probes into contact with the plurality of first terminals of the printed circuit board, and controls the short-circuit jig to separate the first probe and the second probe from the plurality of second terminals of the printed circuit board, The device comprises a measuring unit connected to the inspection jig for measuring the resistance value between adjacent first terminals.

[0009] Furthermore, in the inspection system, The control unit determines that the short-circuit test result is normal if the resistance value is equal to or greater than the reference insulation resistance value.

[0010] Furthermore, in the inspection system, A control unit controls the inspection jig to bring the plurality of probes into contact with the plurality of first terminals on the printed circuit board when performing a continuity test, and controls the shorting jig to bring the first probe and the second probe into contact with adjacent second terminals on the printed circuit board, respectively. The device comprises a measuring unit connected to the inspection jig for measuring the resistance value between adjacent first terminals.

[0011] Furthermore, in the inspection system, The control unit determines that the continuity test result is normal if the resistance value is less than or equal to the reference continuity resistance value.

[0012] Furthermore, in the inspection system, The control unit controls the contact / non-contact between the first probe and the second probe and the adjacent second terminal by rotating the shorting jig.

[0013] Furthermore, in the inspection system, The control unit controls the contact / non-contact between the plurality of probes and the plurality of first terminals by moving the inspection jig up and down.

[0014] Furthermore, in the inspection system, The aforementioned printed circuit board is a long, flexible printed circuit board that electrically connects the battery of an electric vehicle to a battery monitoring unit.

[0015] An inspection method according to one aspect of the present invention is: A testing method for performing short-circuit and continuity tests on printed circuit boards, The printed circuit board includes a plurality of wiring sections, each of which has a first terminal, a second terminal, and wiring that electrically connects the first terminal and the second terminal. With multiple probes of the inspection jig in contact with the multiple first terminals of the printed circuit board, and with the first probe of the short-circuit jig and the second probe electrically connected to the first probe separated from the multiple second terminals of the printed circuit board, the resistance value between adjacent first terminals is measured, and if the resistance value is equal to or greater than the reference insulation resistance value, the short-circuit test result is determined to be normal. In a state where a plurality of probes of the inspection jig are each brought into contact with the plurality of first terminals of the printed wiring board, and the first probe and the second probe of the short-circuit jig are each brought into contact with the adjacent second terminals of the printed wiring board, the resistance value between the adjacent first terminals is measured. If the resistance value is less than or equal to the reference conduction resistance value, it is determined that the result of the conduction inspection is normal.

Effect of the Invention

[0016] According to the present invention, it is possible to provide an inspection system and an inspection method capable of simply and efficiently performing a short-circuit inspection and a conduction inspection of a printed wiring board.

Brief Description of the Drawings

[0017] [Figure 1] It is a diagram showing a schematic configuration of an inspection system according to an embodiment. [Figure 2] It is a schematic cross-sectional view taken along line I-I of FIG. 1 in a state where the probe of the inspection jig is separated from the FPC to be inspected. [Figure 3] It is a schematic cross-sectional view taken along line I-I of FIG. 1 in a state where the probe of the inspection jig is in contact with the FPC to be inspected. [Figure 4] It is a schematic cross-sectional view taken along line II-II of FIG. 1 in a state where the probe of the short-circuit jig is separated from the FPC to be inspected. [Figure 5] It is a diagram showing a schematic configuration of an inspection system according to an embodiment in a state where the probe of the short-circuit jig is in contact with the FPC to be inspected. [Figure 6] It is a schematic cross-sectional view taken along line II-II of FIG. 5. [Figure 7] (a) and (b) are perspective views showing a specific configuration example of the short-circuit jig. [Figure 8] It is a flowchart showing an example of an FPC inspection method according to an embodiment. [Figure 9] (a) is a plan view of the FPC to be inspected, and (b) is a side view of the FPC to be inspected. [Modes for carrying out the invention]

[0018] Embodiments of the present invention will be described below with reference to the drawings. In each figure, components having equivalent functions are denoted by the same reference numerals. The scale ratio of each component has been appropriately changed to ensure that it is recognizable on the drawings.

[0019] <Flexible printed circuit board to be inspected> An example of a flexible printed circuit board (FPC) to be inspected is described with reference to Figures 9(a) and (b).

[0020] The FPC roll 3000 has a long insulating film 301 and a conductive film 340 formed on the insulating film 301, and both sides are wound into a roll shape by roll shafts R1 and R2. The insulating film 301 is made of an insulating material such as polyimide, polyethylene terephthalate (PET), or liquid crystal polymer (LCP). The conductive film 340 is made of a conductive material such as electrolytic copper. FPC forming regions W are arranged on the FPC roll 3000 at predetermined intervals. By rotating the roll shafts R1 and R2 in the same direction, the FPC forming regions W move.

[0021] The flexible printed circuit board 300 is formed within each FPC forming region W of the FPC roll 3000. The flexible printed circuit board 300 is an FPC that is assembled into, for example, the battery of an electric vehicle, and electrically connects the battery, which has multiple cells, to a battery monitoring unit (BMU). The flexible printed circuit board 300 shown in Figure 9(a) includes two FPCs arranged in the width direction of the FPC roll 3000, and the size of each FPC is, for example, 1000 mm in length and 120 mm in width. The size of the printed circuit board to be inspected is arbitrary.

[0022] The flexible printed circuit board 300 includes multiple wiring sections. Each wiring section has a terminal 310, a terminal 320, and wiring 330 that electrically connects terminals 310 and 320. As shown in Figure 9(a), the multiple terminals 310 are concentrated at one end (a predetermined area) of the FPC formation region W. On the other hand, the terminals 320 are arranged at distances corresponding to the spacing between battery cells. When the flexible printed circuit board 300 is assembled to the battery, the multiple terminals 310 are connected to the printed circuit board on which the battery control chip and the like are mounted, and the multiple terminals 320 are connected to the multiple cells that make up the battery, respectively.

[0023] The inspection system 1 of the embodiment described later performs continuity testing and short-circuit testing of the flexible printed circuit board 300. In the continuity test, for each wiring section, it is checked whether terminals 310 and 320 are not disconnected and are electrically connected. In the short-circuit test, it is checked whether adjacent wiring sections are short-circuited.

[0024] <Inspection System> An inspection system 1 according to an embodiment will be described with reference to Figures 1 to 6. The inspection system 1 is an inspection system for performing short-circuit testing and continuity testing of a flexible printed circuit board 300.

[0025] The inspection system 1 comprises an inspection device 10, a measuring unit 20, and a control unit 30. These components are connected to each other.

[0026] The inspection device 10 comprises an inspection jig 11, a short jig 12, and a stage 13.

[0027] The inspection jig 11 includes an insulating substrate 111, a plurality of probes 112 provided on the insulating substrate 111, and a moving mechanism 113 for moving the insulating substrate 111 up and down along the guide G. The plurality of probes 112 are provided to correspond to a plurality of terminals 310 of the flexible printed circuit board 300. Each probe 112 is electrically connected to the measuring unit 20 via a cable. The size of the insulating substrate 111 is, for example, 60 mm in the longitudinal direction of the FPC roll 3000 and 250 mm in the width direction of the FPC roll 3000.

[0028] Figure 2 shows the insulating substrate 111 at a first height position and the probe 112 separated from the terminal 310 (non-contact state). In contrast, Figure 3 shows the insulating substrate 111 at a second height position and the probe 112 in contact with the terminal 310. Thus, in this embodiment, the moving mechanism 113 controls the contact / non-contact between the multiple probes 112 and the multiple terminals 310 by moving the insulating substrate 111 up and down (raising and lowering).

[0029] The shorting jig 12 is a jig constructed separately from the inspection jig 11. As shown in Figures 4 and 6, the shorting jig 12 has an insulating substrate 121, a plurality of probes 122 provided on the insulating substrate 121, and a moving mechanism 123 that rotates the insulating substrate 121 around the rotation axis R at its end. The plurality of probes 122 are provided to correspond to a plurality of terminals 320 of the flexible printed circuit board 300. The size of the insulating substrate 121 is, for example, 100 mm in the longitudinal direction of the FPC roll 3000 and 170 mm in the width direction of the FPC roll 3000.

[0030] The shorting jig 12 is configured to short-circuit the terminals 320 of adjacent wiring sections. That is, for each shorting jig 12 shown in Figure 1, the left and right probes 122 are electrically connected by a cable (not shown). Although the inspection device 10 of this embodiment is equipped with four shorting jigs 12, the number of shorting jigs 12 is not limited to four, and may be any number appropriate to the flexible printed circuit board 300 to be inspected, the inspection content, etc.

[0031] Figure 4 shows the insulating substrate 121 in a vertical position, with each probe 122 separated from its corresponding terminal 320 (non-contact state). In contrast, Figures 5 and 6 show the insulating substrate 121 in a horizontal position, with each probe 122 in contact with its corresponding terminal 320. Thus, in this embodiment, the moving mechanism 123 controls the contact / non-contact between the multiple probes 122 and the multiple terminals 320 by rotating the insulating substrate 121 around the rotation axis R.

[0032] Furthermore, the insulating substrate 111 of the inspection jig 11 and the insulating substrate 121 of the shorting jig 12 are made of materials that have insulating and heat-resistant properties, such as bakelite or glass epoxy resin.

[0033] Figures 7(a) and 7(b) show examples of the configuration of the shorting jig 12. In the example shown in Figure 7(a), the insulating substrate 121 is provided with multiple through holes H at grid point positions. A pair of probes 122, electrically connected to each other by a cable C, are inserted through the through holes H corresponding to the terminals 320 and fixed to the insulating substrate 121. According to this example, by changing the through holes H through which the probes 122 are inserted, it is possible to accommodate multiple types of flexible printed circuit boards with different terminal positions.

[0034] In the example shown in Figure 7(b), the insulating substrate 121 is provided with a plurality of slits S extending in a predetermined direction. A pair of probes 122, electrically connected to each other by a cable C, are inserted through the slits S and fixed to the insulating substrate 121 at positions corresponding to the terminals 320. In this example, by changing the position of the probes 122 in the slits S, it is possible to accommodate multiple types of flexible printed circuit boards with different terminal 320 positions. Furthermore, the position of the probes 122 can be set more precisely compared to the example in Figure 7(a).

[0035] In the example of the shorting jig 12 described above, the probe 122 is fixed to the insulating substrate 121 by, for example, fitting a rubber tube onto the probe 122. Furthermore, a pair of probes 122 may be electrically connected to each other by wiring (not shown) formed on the insulating substrate 121.

[0036] Furthermore, the configuration of the short jig 12 is not limited to the example described above. As another example, the short jig 12 may be a flying probe type that automatically positions the probe.

[0037] Stage 13 is a mounting platform on which the flexible printed circuit board 300 to be inspected is placed. In this embodiment, the inspection jig 11 and the shorting jig 12 are fixed to the stage 13. Note that the inspection jig 11 and / or the shorting jig 12 may be fixed to a fixing part other than the stage 13 (not shown).

[0038] In the inspection apparatus 10 of the above embodiment, the contact / non-contact between the probe and the FPC was controlled by vertical movement of the inspection jig 11 and rotational movement of the shorting jig 12, but this is not limited to this. For example, the contact between the probe 112 and the terminal 310 may be controlled by rotational movement of the inspection jig 11, as with the shorting jig 12. Alternatively, the contact between the probe 122 and the terminal 320 may be controlled by vertical movement of the shorting jig 12, as with the inspection jig 11.

[0039] <Measurement part> The measuring unit 20 is an electrical testing device configured to perform short-circuit testing and continuity testing. For example, the measuring unit 20 has an insulation resistance meter for short-circuit testing and a resistance meter for continuity testing. The resistance value may be measured using either the two-terminal method or the four-terminal method.

[0040] <Department Head> The control unit 30 controls the inspection jig 11, the shorting jig 12, and the measuring unit 20. The control unit 30 is, for example, an information processing device such as a laptop computer or a tablet terminal.

[0041] The control unit 30 controls the height position of the insulating substrate 111 by controlling the movement mechanism 113 of the inspection jig 11. Specifically, when performing short-circuit and continuity tests, the control unit 30 controls the movement mechanism 113 of the inspection jig 11 to lower the insulating substrate 111 and bring the probe 112 into contact with the terminals 310 of the flexible printed circuit board 300.

[0042] When performing a short-circuit test, the control unit 30 controls the movement mechanism 123 of the short-circuit jig 12 to position the insulating substrate 121 vertically and to ensure that the probe 122 is separated from the terminals 320 of the flexible printed circuit board 300. On the other hand, when performing a continuity test, the control unit 30 controls the movement mechanism 123 of the short-circuit jig 12 to rotate the insulating substrate 121 around the rotation axis R to position it horizontally and to ensure that the probe 122 contacts the terminals 320 of the flexible printed circuit board 300.

[0043] When performing a short-circuit test, the control unit 30 controls the measuring unit 20 to measure the insulation resistance between probes 112 that are in contact with adjacent terminals 310, and receives the measurement result. The control unit 30 then determines that the short-circuit test is normal if an insulation state is found. Similarly, when performing a continuity test, the control unit 30 controls the measuring unit 20 to measure the resistance between probes 112 that are in contact with adjacent terminals 310, and receives the measurement result. The control unit 30 then determines that the continuity test is normal if a continuity state is found.

[0044] In the above embodiment, a flexible printed circuit board was used as the object of inspection, but the invention is not limited to this, and other types of printed circuit boards, such as rigid printed circuit boards, may also be used as the object of inspection.

[0045] Furthermore, in the above embodiment, the flexible printed circuit board 300 formed in multiple FPC formation regions W of the FPC roll 3000 was the object of inspection, but the system is not limited to roll format. For example, the inspection system of this embodiment may also inspect panels or individual flexible printed circuit boards.

[0046] Furthermore, while flexible printed circuit boards were used as the subject of inspection in the above embodiment, the test is not limited to flexible printed circuit boards, and other types of printed circuit boards, such as rigid substrates, may also be used as the subject of inspection.

[0047] <Effects and Effects> According to the inspection system 1 of this embodiment, by using a shorting jig 12 that can short-circuit terminals 320 of adjacent wiring sections, short-circuit testing and continuity testing of the flexible printed circuit board 300 can be performed simply and efficiently.

[0048] Furthermore, when the inspection jig 11 and the shorting jig 12 are integrated as a single jig, the jig becomes larger depending on the size (length, etc.) of the flexible printed circuit board 300 to be inspected. However, according to this embodiment, the shorting jig 12 is configured separately from the inspection jig 11. Therefore, even if the flexible printed circuit board 300 to be inspected becomes larger, the jig does not need to be enlarged. As a result, the inspection device 10 can be miniaturized and manufacturing costs can be reduced.

[0049] Furthermore, since the short jig 12 can be manufactured inexpensively, it can easily and inexpensively accommodate larger flexible printed circuit boards 300 to be inspected.

[0050] <Testing Method> The inspection method for a printed circuit board according to the embodiment will be explained with reference to the flowchart in Figure 8. In the initial state, the probe 112 of the inspection jig 11 and the probe 122 of the shorting jig 12 are separated from the terminals 310 and 320 of the flexible printed circuit board 300.

[0051] Step S1: Determine if there are any uninspected flexible printed circuit boards (FPCs) in the FPC roll 3000. If there are any uninspected flexible printed circuit boards 300 (S1: Yes), proceed to step S2; otherwise, terminate.

[0052] Step S2: The roll (rotation axis R) of the FPC roll 3000 is rotated to move the FPC to be inspected onto the stage 13 of the inspection device 10.

[0053] Step S3: The probes 112 of the inspection jig 11 are brought into contact with the terminals 310 of the flexible printed circuit board 300. Specifically, multiple probes 112 of the inspection jig 11 are brought into contact with multiple terminals 310 of the flexible printed circuit board 300. For example, the control unit 30 controls the movement mechanism 113 of the inspection jig 11 to lower the insulating substrate 111 and bring the probes 112 into contact with the terminals 310 of the flexible printed circuit board 300.

[0054] Step S4: A short-circuit test is performed on the flexible printed circuit board 300. Specifically, the measuring unit 20 measures the resistance value between adjacent terminals 310. For example, a constant voltage is applied to adjacent wiring sections via the probe 112 of the test jig 11, and the current value flowing between the wiring sections is detected. Based on the resistance value obtained from the applied voltage value and the detected current value, it is determined whether or not it is insulation resistance. That is, if the resistance value is equal to or greater than the reference insulation resistance value, the control unit 30 determines that no short circuit has occurred between adjacent wiring sections and that the short-circuit test result is normal. On the other hand, if the resistance value is less than the reference insulation resistance value, it is determined to be abnormal. The reference insulation resistance value is, for example, 10 6 Ω~10 10The result is Ω. The determination result may be displayed on the control unit 30's display (not shown) or stored in the control unit 30's memory (not shown).

[0055] Step S5: The probes 122 of the shorting jig 12 are brought into contact with the terminals 320 of the flexible printed circuit board 300. Specifically, the two electrically connected probes 122 (the first probe and the second probe) of the shorting jig 12 are brought into contact with adjacent terminals 320 of the flexible printed circuit board 300. This forms a loop wiring where the two wiring sections are electrically connected at the terminals 320.

[0056] Step S6: Perform a continuity test on the flexible printed circuit board 300. Specifically, the measuring unit 20 measures the resistance between adjacent terminals 310. For example, a constant current is applied to two adjacent wiring sections (loop wiring) electrically connected at terminal 320 via the probe 112 of the test jig 11, and the voltage value between terminals 310 is detected. Based on the resistance value obtained from the applied current value and the detected voltage value, it is determined whether or not there is continuity resistance. That is, if the resistance value is less than or equal to the reference continuity resistance value, the control unit 30 determines that there is no break in the two adjacent wiring sections and that the continuity test result is normal. On the other hand, if the resistance value is greater than the reference continuity resistance value, it is determined that the continuity test result is abnormal. The reference continuity resistance value is, for example, 10 -3 Ω~10 -1 The result is Ω. The determination result may be displayed on the control unit 30's display (not shown) or stored in the control unit 30's memory (not shown).

[0057] Step S7: Remove the probes 112 and 122 of the inspection jig 11 and the shorting jig 12 from the flexible printed circuit board 300. For example, the control unit 30 controls the movement mechanism 113 of the inspection jig 11 to raise the insulating substrate 111, and controls the movement mechanism 123 of the shorting jig 12 to rotate the insulating substrate 121 around the rotation axis R to a vertical position. After performing step S7, return to step S1 and determine whether there are any uninspected flexible printed circuit boards 300.

[0058] As described above, according to the inspection method of this embodiment, when performing a short-circuit test, the multiple probes 112 of the inspection jig 11 are brought into contact with the multiple terminals 310 of the flexible printed circuit board 300, and the pair of electrically connected probes (first probe and second probe) of the short-circuit jig 12 are separated from the multiple terminals 320 of the flexible printed circuit board 300. With these probes separated, the resistance value between adjacent terminals 310 is measured, and if the resistance value is equal to or greater than the reference insulation resistance value, the short-circuit test result is determined to be normal. On the other hand, if the resistance value is less than the reference insulation resistance value, the short-circuit test result is determined to be abnormal. Thus, in this embodiment, the short-circuit test is performed with the short-circuit jig 12 separated from the terminals 320 of the flexible printed circuit board 300.

[0059] Furthermore, according to the inspection method of the above embodiment, when performing a continuity test, the multiple probes 112 of the inspection jig 11 are brought into contact with the multiple terminals 310 of the flexible printed circuit board 300, and the pair of electrically connected probes (first probe and second probe) of the shorting jig 12 are brought into contact with adjacent terminals 320 of the flexible printed circuit board 300, respectively. With these conditions met, the resistance value between adjacent terminals 310 is measured, and if the resistance value is less than or equal to the reference continuity resistance value, the continuity test result is determined to be normal. On the other hand, if the resistance value is greater than the reference continuity resistance value, the continuity test result is determined to be abnormal. Thus, in this embodiment, the continuity test is performed with the shorting jig 12 in contact with the terminals 320 of the flexible printed circuit board 300. The shorting jig 12 shorts adjacent terminals 320 together, so that adjacent wiring sections are connected at the terminal 320 side and become a single wiring (loop wiring). By measuring the resistance between terminals 310 while the loop wiring is formed, continuity testing of multiple wiring sections constituting the loop wiring can be performed simultaneously.

[0060] The above inspection method is merely an example, and various modifications are possible. For example, a continuity test may be performed first, followed by a short-circuit test. In this case, in step S3, the contents of step S5 (contacting the probe 122 of the short-circuit jig 12 with the terminal 320 of the flexible printed circuit board 300) are performed, followed by the contents of step S6 (continuity test). Then, instead of step S5, a step is performed in which the probe 122 of the short-circuit jig 12 is removed from the terminal 320 of the flexible printed circuit board 300, and the contents of step S4 (short-circuit test) are performed.

[0061] Based on the above description, those skilled in the art may conceive of additional effects and various modifications of the present invention, but the embodiments of the present invention are not limited to the individual embodiments described above. Components from different embodiments may be combined as appropriate. Various additions, modifications, and partial deletions are possible without departing from the conceptual idea and spirit of the present invention derived from the claims and their equivalents. [Explanation of symbols]

[0062] 1. Inspection System 10 Inspection equipment 11. Inspection fixture 111 Insulating substrate 112 probes 113 Moving mechanism 12 Short jigs 121 Insulating substrate 122 probes 123 Moving mechanism 13 stages 20 Measuring part 30 Control Unit 300 Flexible Printed Circuit Boards 301 Insulating film 310,320 terminals 330 Wiring 340 Conductive film 3000 FPC rolls C Cable G Guide H through hole R rotation axis R1, R2 Roll Axes S-slit W FPC formation area

Claims

1. An inspection system for performing short-circuit and continuity tests on printed circuit boards, The printed circuit board includes a plurality of wiring sections, each of which has a first terminal, a second terminal, and wiring that electrically connects the first terminal and the second terminal. An inspection jig having a plurality of probes that can contact each of the first terminals of the plurality of wiring sections, A shorting jig, configured separately from the aforementioned inspection jig, having a first probe and a second probe electrically connected to each other, wherein the first probe and the second probe are each capable of contacting adjacent second terminals on the printed circuit board, and An inspection system equipped with the following features.

2. When performing a short-circuit test, a control unit controls the test jig to bring the plurality of probes into contact with the plurality of first terminals of the printed circuit board, and controls the short-circuit jig to separate the first probe and the second probe from the plurality of second terminals of the printed circuit board, A measuring unit connected to the inspection jig for measuring the resistance value between adjacent first terminals, The inspection system according to claim 1, comprising:

3. The inspection system according to claim 2, wherein the control unit determines that the short-circuit test result is normal if the resistance value is equal to or greater than a reference insulation resistance value.

4. When performing a continuity test, a control unit controls the test jig to bring the plurality of probes into contact with the plurality of first terminals on the printed circuit board, and controls the shorting jig to bring the first probe and the second probe into contact with adjacent second terminals on the printed circuit board, A measuring unit connected to the inspection jig for measuring the resistance value between adjacent first terminals, The inspection system according to claim 1, comprising:

5. The inspection system according to claim 4, wherein the control unit determines that the result of the continuity test is normal if the resistance value is less than or equal to a reference continuity resistance value.

6. The inspection system according to any one of claims 2 to 5, wherein the control unit controls the contact / non-contact between the first probe and the second probe and the adjacent second terminal by rotating the shorting jig.

7. The inspection system according to any one of claims 2 to 5, wherein the control unit controls contact / non-contact between the plurality of probes and the plurality of first terminals by moving the inspection jig up and down.

8. The inspection system according to claim 1, wherein the printed circuit board is a long, flexible printed circuit board that electrically connects the battery of an electric vehicle and a battery monitoring unit.

9. A testing method for performing short-circuit and continuity tests on printed circuit boards, The printed circuit board includes a plurality of wiring sections, each of which has a first terminal, a second terminal, and wiring that electrically connects the first terminal and the second terminal. With multiple probes of the inspection jig in contact with multiple first terminals of the printed circuit board, and with the first probe of the short-circuit jig and the second probe electrically connected to the first probe separated from the multiple second terminals of the printed circuit board, the resistance value between adjacent first terminals is measured, and if the resistance value is equal to or greater than the reference insulation resistance value, the short-circuit test result is determined to be normal. An inspection method comprising: bringing multiple probes of the inspection jig into contact with multiple first terminals of the printed circuit board, respectively; and bringing the first probe and the second probe of the shorting jig into contact with adjacent second terminals of the printed circuit board, respectively; measuring the resistance value between adjacent first terminals; and determining that the continuity test result is normal if the resistance value is less than or equal to a reference continuity resistance value.

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