JP2013005558A - Battery charger performance inspection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery charger performance inspection method which would not damage output terminals or would not cause output terminals to be deformed under stresses.SOLUTION: In the insulation performance inspection of a battery charger 11, four of electrical conduction jigs 51 respectively are fitted to four of charging tubs 11a by holding a grip 52a on each jig first, whereby output terminals 12a, 12b and 12c on each charging tub 11a are collectively connected. Next, the other end of a lead wire 7a which is connected at one end to one of the electrical conduction jigs 51 is connected to an input terminal on one side of an insulation performance inspection device 6. Next, a pair of plug blades of a power plug 14 are picked with a crocodile clip 8 provided at one end of another lead wire 7b, whereby input terminals are collectively connected. Next, the other end of the lead wire 7b is connected to an input terminal on the other side of the insulation performance inspection device 6. In this state, the insulation performance inspection device 6 is actuated, to perform insulation resistance test or dielectric voltage test between the input and output terminals.

Description

  The present invention relates to a method for inspecting the performance of a charger provided with a protruding output terminal in electrical contact with a charging terminal of a secondary battery pack in a basket into which the secondary battery pack is inserted.

  Conventionally, as this type of charger, there is one disclosed in Patent Document 1, for example.

  This charger has a built-in charging circuit including a DC-DC converter, a reference power supply, and a microcomputer. The AC commercial power input to the charger is rectified to DC and then converted into a voltage by a DC-DC converter and output from a pair of output terminals. One of the output terminals is connected to the ground potential line of the charging circuit. The charging power output from the output terminal is given to the secondary battery pack through a pair of charging terminals of the secondary battery pack.

  The secondary battery pack has a built-in temperature sensor in which the voltage generated by the reference power supply of the charger is connected to the third output terminal of the charger and the third charge terminal of the secondary battery pack. Applied. Since the resistance of the temperature sensor changes depending on the temperature of the secondary battery pack and the voltage between the terminals changes, the microcomputer detects the temperature of the secondary battery pack by detecting this voltage change.

  Conventionally, the insulation performance inspection of this type of charger has been performed by the apparatus configuration shown in FIG. The above-mentioned three output terminals 2a, 2b, 2c formed by leaf springs or the like are provided on the inner bottom surface of each charging rod 1a of the charger 1 into which the secondary battery pack is inserted. The insulation performance inspection needs to be performed in the finished product state of the charger 1, and between the input terminal consisting of the plug 3 connected to the AC commercial power source and the output terminals 2a, 2b, 2c, the input terminal and the housing 1b. In the meantime, a predetermined high voltage is applied between the output terminals 2a, 2b, 2c and the housing 1b. Conventionally, when testing the insulation performance of the charger 1 between the input terminal and the output terminals 2a, 2b, and 2c, the output terminals 2a, 2b, and 2c of each charging rod 1a are provided at each end of the plurality of lead wires 4a. The other alligator clip 5 is picked and the other end of each lead wire 4a is bundled and connected to one input terminal of the insulation performance inspection device 6. Further, the plug 3 is picked up by an alligator clip 5 provided at one end of another lead wire 4 b, and the other end of the lead wire 4 b is connected to the other input terminal of the insulation performance inspection device 6.

Japanese Patent Laid-Open No. 9-23591

  However, in the insulation performance test of the conventional charger, each output terminal 2a, 2b, 2c is picked by the alligator clip 5, so that each output terminal 2a, 2b, 2c has a saw-like shape of the alligator clip 5. There was a possibility that the clip portion would be damaged. In addition, the lead wire 4a is pulled at the time of the insulation performance inspection, and a force is applied to the alligator clip 5 that picks up each output terminal 2a, 2b, 2c, and stress is applied to each output terminal 2a, 2b, 2c to output each output. The terminals 2a, 2b, 2c may be deformed. Furthermore, it is necessary to pick up the plurality of output terminals 2a, 2b, 2c with the alligator clip 5 at the time of the insulation performance inspection, which takes time for the insulation performance inspection.

The present invention has been made to solve such problems,
In the performance inspection of the charger that has a plurality of output terminals that protrude in electrical contact with the charging terminals of the secondary battery pack in the cage in which the secondary battery pack is inserted, and outputs charging power from the built-in charging circuit to the output terminal,
Test the performance of the charger by fitting a conductive jig made of a conductive material with a shape that fits into the bag into the bag and connecting the lead wire electrically connected to the conductive jig to the performance inspection device. Thus, a method for inspecting the performance of the charger was configured.

  According to this configuration, when the performance of the charger is inspected, the conductive jig is fitted into the bag, so that the plurality of output terminals provided protruding from the bag are electrically connected to the conductive jig. Since the lead wire is electrically connected to the conductive jig, by connecting this lead wire to the performance inspection device, each output terminal can be The output terminal can be connected to the performance inspection device. For this reason, even if the charger is in a finished product state, the charger's performance can be prevented without causing damage to the output terminal or deformation of the output terminal due to stress applied to the output terminal as in the conventional charger performance inspection method. Inspection can be easily performed. Furthermore, it is possible to connect the output terminals of the charger all at once by simply fitting the conductive jig into the cage, and the troublesome work of picking each output terminal one by one with a crocodile clip as before. Since it is not required, the labor required for performance inspection can be reduced.

  In the present invention, when conducting a performance test of a charger having a plurality of hooks and one output terminal of each hook commonly connected to the reference potential line of the charging circuit, a conductive jig is fitted to each of the plurality of hooks. A lead wire electrically connected to one conductive jig is connected to a performance inspection device to inspect the performance of the charger.

  According to this configuration, since one output terminal of each cage is commonly connected to the reference potential line of the charging circuit, the conductive jig fitted to each cage is fitted by fitting a conductive jig to each cage. The tools are collectively connected in common to the reference potential line of the charging circuit through one output terminal. For this reason, by connecting the lead wires electrically connected to one conductive jig to the performance inspection device, the output terminals electrically connected to the conductive jigs fitted in the respective cages can be collectively connected. Can be connected to the performance inspection device. Therefore, even if the charger is provided with a plurality of eaves, it is possible to easily perform the performance inspection without requiring labor.

  In addition, the present invention is characterized in that the conductive jig includes an insulator having an insulating property that covers a portion exposed from the ridge when fitted to the ridge.

  According to this configuration, the conductive jig is provided with an insulating insulator, and the exposed portion is covered with the insulator when fitted into the bag. The risk of electric shock when touched is avoided. For this reason, it becomes possible to perform a performance inspection safely.

  The present invention also includes an insulator having an insulating property that covers a portion exposed from the ridge when the plurality of conductive jigs are fitted to the heel, and each of the insulators is attached to each heel. It is characterized by being integrated by a connector at a fitting interval.

  According to this structure, since each insulator is integrated by a connector at intervals at which each conductive jig is fitted to each hook, without fitting each conductive jig to each hook one by one, A plurality of conductive jigs can be fitted into each rod at the same time. For this reason, it becomes possible to perform the performance test | inspection of a charger provided with a some cage | basket quickly.

  According to the present invention, as described above, it is possible to easily perform the performance inspection of the charger without the possibility that the output terminal is damaged or the output terminal is deformed by applying stress to the output terminal. Furthermore, time and effort for performance inspection can be reduced.

It is a figure which shows the apparatus structure used for the insulation performance test | inspection of the conventional charger. It is a figure which shows the apparatus structure used for the performance test | inspection of the charger by one Embodiment of this invention. FIG. 3 is a schematic circuit diagram showing a state in which a charging circuit built in a housing of the charger shown in FIG. 2 is connected to a secondary battery pack. It is a perspective view which shows the structure of the modification of one Embodiment with which the insulator of each electrically conductive jig shown in FIG. 2 was integrated by the coupling tool.

    Next, a charger performance inspection method according to an embodiment of the present invention will be described.

  FIG. 2 is a diagram showing a device configuration used for the insulation performance inspection of the charger according to this embodiment.

  The charger 11 has a substantially rectangular parallelepiped casing 11b, and four casings 11a into which secondary battery packs are inserted are formed in the casing 11b. Each charging case 11a is recessed in a direction from the top surface to the bottom surface of the housing 11b, and a rectangular space that is slightly larger than the insertion portion of the secondary battery pack is formed. Three output terminals 12a, 12b, and 12c are provided on the inner bottom surface of each charging rod 11a. Each output terminal 12a, 12b, 12c is composed of a leaf spring bent in an inverted V shape, and the apex of the bent portion is elastic in a direction perpendicular to the inner bottom surface of the charging rod 11a, and has a mountain shape on the inner bottom surface. Protruding. In each of the output terminals 12a, 12b, and 12c, the protruding portion of the leaf spring is in electrical contact with the charging terminal of the secondary battery pack inserted into each charging rod 11a with an appropriate contact pressure.

  In addition, you may make it each output terminal 12a, 12b, 12c make the front-end | tip part of a rod-shaped member protrude from the internal bottom face of the charging rod 11a. In this case, the rod-like member is elastic in the direction perpendicular to the inner bottom surface of the charging rod 11a by a cylindrical coil spring or the like inside the bottom surface of the charging rod 11a, and is moderately connected to the charging terminal of the secondary battery pack. Electrical contact with the contact pressure of.

  A power cord 13 extends from the housing 11b, and a power plug 14 is provided at the tip of the power cord 13. In addition, four charging lamps 15 are provided on the front side of the upper surface of the housing 11b so as to correspond to each charging rod 11a, and a power lamp 16 is provided on the right end. When the power plug 14 is inserted into an outlet and the charger 11 is connected to a commercial AC power source, the power lamp 16 is turned on. Further, the charging lamp 15 is lit while the secondary battery pack is inserted into each charging rod 11a and charging power is output from the charging circuit built in the housing 11b to each secondary battery pack.

  FIG. 3 is a schematic circuit diagram showing a state where the charging circuit 11 c built in the housing 11 b of the charger 11 is connected to the secondary battery pack 41.

  The charging circuit 11 c includes a high-frequency transformer 21, a rectifier 22, a DC-DC converter 23, a reference power supply 24, and a microcomputer (microcomputer) 25. The AC commercial power input from the power plug 14 to the charging circuit 11 c via the power cord 13 is stepped down to a predetermined voltage by the high frequency transformer 21 and rectified to DC by the rectifier 22. Thereafter, the voltage is converted by the DC-DC converter 23 and output from the pair of output terminals 12a and 12c. One output terminal 12c is connected to the ground line of the charging circuit 11c and set to the ground potential. The charging power output from the output terminals 12a and 12c is given to the secondary battery pack 41 via the pair of charging terminals 42a and 42c of the secondary battery pack 41.

  A secondary battery 43 is built in the secondary battery pack 41, and the secondary battery 43 is charged by electric power supplied from the charging terminals 42 a and 42 c via the short-circuit prevention diode 44. The secondary battery pack 41 has a built-in temperature sensor 45 such as a thermistor. In this temperature sensor 45, a reference voltage Vr generated by the reference power supply 24 of the charging circuit 11c is divided by the resistor 26, and is output via the output terminal 12b of the charger 11 and the charging terminal 42b of the secondary battery pack 41. Applied. The resistance of the temperature sensor 45 changes depending on the temperature of the secondary battery pack 41, and the inter-terminal voltage Vt changes. The microcomputer 25 operates with a reference voltage Vr applied between the VDD terminal and the GND terminal, detects a change in the voltage Vt between the terminals of the temperature sensor 45 at the THV terminal, and detects the temperature of the secondary battery pack 41. . Then, an output signal corresponding to the detected temperature is output from the ISW terminal to the DC-DC converter 23, causing the DC-DC converter 23 to perform rapid charging when detecting a normal temperature, and trickle charging when detecting an abnormal temperature. .

  Although a set of output terminals 12a, 12b, and 12c of the charger 11 is not shown in the circuit diagram of FIG. 4, a total of four sets are provided for each of the four charging rods 11a. One output terminal 12c in each set is commonly connected to a ground line set to the reference potential of the charging circuit 11c.

  When the microcomputer 25 detects that the power supply plug 14 is inserted into the outlet and the reference voltage Vr is output from the reference power supply 24, the microcomputer 25 reduces the potential of the LD1 terminal and is connected to the reference power supply 24 via the resistor 27. The light emitting diode 28 is energized, and the power lamp 16 is turned on. Further, when the secondary battery pack 41 is inserted into the charging pad 11a and charging of the secondary battery pack 41 from the charging circuit 11c is started, the potential of the LD2 terminal is lowered and the reference power source 24 is connected via the resistor 29. The connected light emitting diode 30 is energized, and the charging lamp 15 is turned on. When the charging of the secondary battery pack 41 from the charging circuit 11c is completed, the potential of the LD2 terminal is increased to stop energization of the light emitting diode 30, and the charging lamp 15 is turned off.

  Such an insulation performance of the charger 11 is such that the input terminal including the power plug 14 and the output terminals 12a, 12b, and 12c, the input terminal and the housing 11b, and the output terminals 12a, 12b, and 12c A predetermined high voltage is applied between the case 11b and the insulation performance inspection device 6 shown in FIG. 2 for testing. The insulation performance test includes an insulation resistance test performed by applying a DC voltage of 500 [V] between them, and an insulation voltage test performed by applying an AC voltage of 1000 [V]. The input terminals and the output terminals 12a, 12b, and 12c are all connected together.

  In this embodiment, this collective connection of the output terminals 12a, 12b, and 12c is performed by fitting the conductive jig 51 shown in FIG. The conductive jig 51 has a rectangular parallelepiped shape that fits into the charging rod 11a, is made of a conductive material such as iron or copper, and includes an insulator 52 made of an insulating resin or the like on the upper surface portion. For this reason, when the conductive jig 51 is fitted to the charging rod 11a, the upper surface portion exposed from the charging rod 11a is covered with the insulator 52. The insulator 52 has a handle 52a made of resin or the like on the upper surface.

  One of the four conductive jigs 51 is electrically connected to one end of one lead wire 7a. For this connection, a crimping terminal (not shown) provided at one end of the lead wire 7 a is screwed into a screw groove formed in the conductive jig 51, or one end of the lead wire 7 a is soldered to the conductive jig 51. This is done.

  When inspecting the insulation performance between the input terminal and the output terminals 12a, 12b, and 12c of the charger 11 according to the present embodiment, first, the handle 52a is held and the four conductive jigs 51 are connected to the four charging rods. The output terminals 12a, 12b, and 12c in each charging rod 11a are collectively connected by being fitted to 11a. Next, the other end of the lead wire 7 a connected to one conductive jig 51 is connected to one input terminal of the insulation performance inspection device 6. Next, the input terminals are collectively connected by picking a pair of plug blades of the power plug 14 with an alligator clip 8 provided at one end of another lead wire 7b. Next, the other end of the lead wire 7 b is connected to the other input terminal of the insulation performance inspection device 6. In this state, the insulation performance inspection device 6 is operated to perform the above insulation resistance test and insulation withstand voltage test.

  According to the insulation performance inspection method according to the present embodiment, when the insulation performance inspection of the charger 11 is performed, the conductive jig 51 is fitted to the charging case 11a as described above, so that it protrudes into the charging case 11a. The three output terminals 12a, 12b, 12c provided and the conductive jig 51 are electrically connected. Since the lead wire 7a is electrically connected to the conductive jig 51, by connecting the lead wire 7a to the insulation performance inspection device 6, each output terminal 2a, 2b, Each output terminal 12a, 12b, 12c of the charger 11 can be connected to the insulation performance inspection device 6 without picking 2c with the alligator clip 5. For this reason, even when the charger 11 is in a finished product state, the output terminals 12a, 12b, 12c are damaged by the alligator clip 5 or the output terminals 12a, 12b, 12c, as in the conventional method for inspecting the insulation performance of a charger. It is possible to easily inspect the insulation performance of the charger 11 without fear that the output terminals 12a, 12b, and 12c are deformed due to the stress applied to the charger 11. Furthermore, the output terminals 12a, 12b, and 12c of the charger 11 can be collectively connected only by performing the work of fitting the conductive jig 51 to the charging rod 11a. As shown in FIG. Since the troublesome work of picking the output terminals 2a, 2b, 2c one by one with the alligator clip 5 is not required, the labor for the insulation performance inspection can be reduced.

  In addition, according to the insulation performance inspection method according to the present embodiment, since one output terminal 12c in each charging rod 11a is commonly connected to the ground line of the charging circuit 11c, the conductive jig 51 is attached to each charging rod 11a. By fitting, the conductive jigs 51 fitted to the respective charging rods 11a are collectively connected in common to the ground line of the charging circuit 11c via one output terminal 12c. For this reason, by connecting the lead wire 7a electrically connected to one conductive jig 51 to the insulation performance inspection apparatus 6, each electrically connected to the conductive jig 51 fitted to each charging rod 11a. The output terminals 12a, 12b, and 12c can be connected together and connected to the insulation performance inspection apparatus 6. Therefore, even if the charger 11 includes a plurality of charging rods 11a, it is possible to easily perform the insulation performance inspection without requiring labor.

  Further, according to the insulation performance inspection method according to the present embodiment, the conductive jig 51 includes the insulator 52 having an insulating property, and the exposed portion is covered with the insulator 52 when fitted to the charging rod 11a. The risk of an electric shock by an operator touching the conductive jig 51 during the insulation performance inspection of the charger 11 is avoided. For this reason, it becomes possible to perform an insulation performance test | inspection safely.

  In the embodiment described above, the case where the insulators 52 provided in the conductive jig 51 are provided separately one by one has been described. However, as shown in FIG. You may comprise as follows. In this case, the connector 53 integrates the insulators 52 at intervals at which the conductive jigs 51 are fitted into the charging rods 11a. In the figure, the same parts as those in FIG.

  According to such a configuration, since each insulator 52 is integrated by the coupler 53, the plurality of conductive jigs 51 are attached without fitting the conductive jigs 51 to the charging rods 11a one by one. It can be simultaneously fitted to each charging rod 11a. For this reason, it becomes possible to perform the performance test | inspection of the charger 11 provided with the some charging rod 11a rapidly.

  Moreover, although the said embodiment demonstrated the case where the charger 11 was provided with the some charging rod 11a, you may comprise the charger 11 so that it may be provided with one charging rod 11a. Also in this configuration, the output terminals 12a, 12b, and 12c of the charger 11 can be collectively connected by performing only the operation of fitting the conductive jig 51 to the charging rod 11a. An effect is produced.

  Moreover, although the said embodiment demonstrated the insulation performance test | inspection between an input terminal and output terminal 12a, 12b, 12c, output terminal 12a, 12b, which needs to connect output terminal 12a, 12b, 12c collectively. The present invention can be similarly applied to the insulation performance inspection between 12c and the casing 11b.

  Moreover, although the said embodiment demonstrated the case where the insulation performance was test | inspected as the performance of the charger 11, also about the other performance test | inspection of the charger 11 which needs to connect output terminal 12a, 12b, 12c collectively, Similarly, the present invention can be applied.

  The charger performance inspection method according to the present invention includes the above-described charger 11 for charging the secondary battery pack 41 used in the wireless device, and an output terminal in electrical contact with the charging terminal of the secondary battery pack in the charging tub. It can be applied to the performance inspection of various chargers provided with a plurality of protrusions.

6 ... Insulation performance inspection device 7a, 7b ... Lead wire 8 ... Alligator clip 11 ... Charger 11a ... Charger 11b ... Housing 11c ... Charging circuit 12a, 12b, 12c ... Output terminal 14 ... Power plug (input terminal)
51 ... Conductive jig 52 ... Insulator 52a ... Handle 53 ... Connector

Claims (4)

In the performance inspection of the charger that has a plurality of output terminals that protrude in contact with the charging terminal of the secondary battery pack in the basket into which the secondary battery pack is inserted and outputs charging power from the built-in charging circuit to the output terminal. ,
A conductive jig made of a conductive material having a shape that fits into the collar is fitted into the collar, a lead wire electrically connected to the conductive jig is connected to a performance inspection device, and a charger Charger performance inspection method for inspecting performance.   In the performance inspection of the charger having a plurality of the collars, and one output terminal in each of the collars commonly connected to the reference potential line of the charging circuit, the conductive jigs are respectively fitted to the plurality of the collars, The charger performance inspection method according to claim 1, wherein the performance of the charger is inspected by connecting the lead wire electrically connected to one of the conductive jigs to a performance inspection device.   The performance inspection of the charger according to claim 1, wherein the conductive jig includes an insulator having an insulating property to cover a portion exposed from the ridge when fitted to the ridge. Method.   Each of the plurality of conductive jigs includes an insulator having an insulating property to cover a portion exposed from the ridge when fitted to the ridge, and each of the insulators includes the conductive jig attached to each ridge. 3. The method for inspecting the performance of a charger according to claim 2, wherein the battery is integrated by a connector at a fitting interval.

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