JP2017173012A - Method and device for measuring electrical storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow internal resistance of individual storage batteries to be measured by facilitating probing the individual storage batteries in an electrical storage device including a plurality of storage batteries.SOLUTION: In a method for measuring an electrical storage device, an electrical storage device BT including a storage battery group G where a plurality of storage batteries B are connected in series is taken as a measurement object, and an AC current source 100, an AC voltmeter 200 and a DC voltmeter 300 are prepared. Current supply probes 110, 120 and DC voltage detection probes 310, 320 are respectively connected to one terminal electrode T1 and the other terminal electrode T2 of the storage battery group G, and an AC current for measurement is supplied from the AC current source 100 to the storage battery group G to measure a DC voltage of the entire storage battery group B by the DC voltmeter 300, and first voltage detection probes 210, 220 are successively alternately connected to terminals of individual storage batteries B in the storage battery group G to measure internal resistance of the individual storage batteries B.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a measuring method and a measuring apparatus for a power storage device including a plurality of storage batteries, and more specifically to a technique for measuring the internal resistance of each storage battery.

  Generally speaking, the deterioration state of a storage battery (including a primary battery and a secondary battery) can be determined by its internal resistance (equivalent series resistance) and its DC voltage between terminals. That is, as the deterioration progresses, the internal resistance increases while the inter-terminal DC voltage tends to decrease.

  Patent Document 1 proposes a battery measuring apparatus based on an alternating current four-terminal method that can simultaneously measure the internal resistance of a storage battery and the inter-terminal DC voltage in one operation, and the configuration is schematically shown in FIG. Explained.

  This battery measuring device is generated between an AC constant current source 10 that applies an AC signal for measurement to a battery BT as an element to be measured via a coupling capacitor 11, and a terminal of the battery BT when the AC current is applied. In addition to the internal resistance detector (AC voltmeter) 20 including the detection circuit 26 that detects the AC voltage to be detected via the coupling capacitors 23 and 24, the voltage detector (DC voltmeter) that detects the DC voltage between the terminals of the battery BT. ) 30, and the CPU (control unit) 52 determines the deterioration state of the battery BT based on the detected internal resistance and the DC voltage between the terminals.

  In either case of the AC four-terminal method or the DC four-terminal method, normally, two pairs of probes having two conductors as one pair are used for the probe, and one conductor of each pair of probes is used. The voltage detection side is connected to the voltmeter, and the other conductor is connected to the measurement signal source as the current supply side. One conductor on the voltage detection side is shared by the AC voltmeter and the DC voltmeter. The AC voltmeter is connected to the conductor on the voltage detection side via a coupling capacitor, and the DC voltmeter is directly connected to the conductor on the voltage detection side. (See FIG. 9).

  Thus, according to the battery measuring apparatus described in Patent Document 1, the internal resistance of the battery BT and the DC voltage between the terminals can be measured at the same time by one operation, and even the deterioration determination is performed based on these measured values. It can be carried out.

  However, in an actual power storage device (storage battery facility) and the like, as illustrated in FIG. 10, a plurality of storage batteries are connected in series and in parallel, so when measuring the internal resistance and the like of each storage battery, Contacting two pairs of probes for each storage battery is a complicated operation.

JP-A-9-281202

  Accordingly, an object of the present invention is to facilitate probing work for each storage battery and measure the DC voltage of the entire storage apparatus in measuring the internal resistance of each storage battery in a storage apparatus including a plurality of storage batteries. It is to be able to measure.

In order to solve the above-described problem, the present invention provides a method for measuring a power storage device in which a power storage device includes a storage battery group in which a plurality of storage batteries are connected in series.
An AC current source having a pair of current supply probes, an AC voltmeter having a pair of first voltage detection probes, and a DC voltmeter having a pair of second voltage detection probes,
The current supply probe and the second voltage detection probe are brought into contact with one output electrode and the other output electrode of the storage battery group, respectively, and an AC current for measurement is applied to the storage battery group from the AC current source. And measuring the direct-current voltage of the entire storage battery group with the direct-current voltmeter, and alternately contacting the first voltage detection probe with the terminals of the individual storage batteries in the storage battery group in turn. It is characterized by measuring the internal resistance.

  In this power storage device measuring method, a clip-free, screw-type, clamp-type or other hands-free type probe is preferably used for the current supply probe and the second voltage detection probe.

Further, the present invention also includes a measuring device for a power storage device whose target is a power storage device including a storage battery group in which a plurality of storage batteries are connected in series.
The power storage device measuring apparatus includes an alternating current source having a pair of current supply probes, an alternating current voltmeter having a pair of first voltage detection probes, and a direct current voltmeter having a pair of second voltage detection probes. The current supply probe and the second voltage detection probe are brought into contact with one output electrode and the other output electrode of the storage battery group, respectively, and an alternating current for measurement is applied to the storage battery group from the alternating current source. And measuring the direct current voltage of the entire storage battery group with the direct current voltmeter, and alternately contacting the first voltage detection probe with the terminals of the individual storage batteries in the storage battery group in turn. When measuring internal resistance,
As a probe support means, it has a guide rail for moving the probe arranged above the storage battery group over at least one output electrode and the other output electrode of the storage battery group, and the current supply probe, The first voltage detection probe and the second voltage detection probe are movably supported.

  According to a preferred aspect of the measuring apparatus of the power storage device, the probe support means includes lifting / lowering means for moving the guide rail to an ascending position where the probes are separated from the storage battery group and a descending position where the probe contacts the storage battery group. ing.

  As a more preferred aspect, the probe support means includes both the first current supply probe and the first probe support portion supporting the two probes of the second voltage detection probe, and the other current supply probe. A second probe support for supporting the two probes of the second voltage detection probe; a third probe support for supporting the one first voltage detection probe alone; and the other first voltage detection probe. A fourth probe support section that is supported alone, and the first to fourth probe support sections are slidably supported by the guide rail.

  Preferably, the probe support means includes probe moving means for individually moving at least the third probe support part and the fourth probe support part along the guide rail.

  As the probe moving means, a pinion rack mechanism comprising rack teeth formed on the guide rail side and a motor driven pinion gear provided on the probe support part side is preferable.

  As another aspect of the probe moving means, the probe moving means comprises two ball screws disposed on the guide rail so as to be parallel to each other along the extending direction of the guide rail, and the third probe support portion is the one of the ones. The fourth probe support portion may be reciprocally driven by the other ball screw.

  The probe moving means includes a linear motor table having two moving tables provided on the guide rail along the extending direction of the guide rail, and the third probe support portion is provided on the one moving table. The aspect which mounts and the said 4th probe support part is mounted in said other movement table may be sufficient.

  According to the present invention, the current supply probe for supplying the measurement signal and the second voltage detection probe for detecting the DC voltage are preferably brought into contact with one output electrode and the other output electrode of the storage battery group in a hands-free manner. In addition, since only the first voltage detection probe for AC voltage detection needs to be sequentially contacted with the terminals of the individual storage batteries, the probing work for the individual storage batteries can be easily performed. The internal resistance measurement of the storage battery and the DC voltage measurement of the entire power storage device can be performed at a time, and the inspection man-hours for storage battery deterioration can be reduced.

The schematic diagram which shows schematically the structure of the measuring apparatus of the electrical storage apparatus by this invention. The schematic diagram which shows the 1st example of the measuring method by the said measuring apparatus. The schematic diagram which shows the 2nd example of the measuring method by the said measuring apparatus. The schematic diagram which illustrated the probe support means of the said measuring apparatus. Sectional drawing along the AA line of FIG. The typical side view which shows an example of the probe moving means with which the said probe support means is provided. The typical top view which shows another example of the said probe moving means. The typical top view which shows another example of the said probe moving means. The block diagram which shows the battery measuring apparatus as a prior art. The schematic diagram which shows an example of the electrical storage apparatus formed by connecting a some storage battery in series and parallel.

  Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 6, but the present invention is not limited to this.

  As shown in FIG. 1, the measurement device for a power storage device according to this embodiment includes an alternating current source 100, an alternating current voltmeter 200, a direct current voltmeter 300, and a control unit 400 as a basic configuration. .

  The alternating current source 100 includes a pair of current supply probes 110 and 120, and a coupling capacitor 130 is connected in at least one of the current supply paths.

  The AC voltmeter 200 includes a pair of first voltage detection probes 210 and 220, and coupling capacitors 231 and 232 are connected to the respective voltage detection paths. AC voltage meter 200 may include a detection circuit that is synchronized with the phase of AC current source 100, as in the battery measurement device shown in FIG. In the following description, the first voltage detection probe may be referred to as an “AC voltage detection probe”.

  The AC four-terminal method is measured by the AC current source 100 and the AC voltmeter 200. In the present invention, the current supply probes 110 and 120 of the AC current source 100 and the AC voltage detection probe 210 of the AC voltmeter 200 are used. As will be described later, each of 220 can be individually moved as a single probe (contact).

  In addition, the DC voltmeter 300 includes a pair of second voltage detection probes 310 and 320 as in the AC voltmeter 200. In the following description, the second voltage detection probe may be referred to as a “DC voltage detection probe”.

  The control unit 400 uses a microcomputer or a CPU (Central Processing Unit), and preferably has a function corresponding to the digital processing unit provided in the battery measuring apparatus shown in FIG.

  The control unit 400 is provided with measurement voltages from the AC voltmeter 200 and the DC voltmeter 300, respectively, and the AC current source 100 is provided with information such as the current value and phase of the AC signal for measurement.

  The control unit 400 performs various calculations based on these pieces of information, and as one of them, from the voltage v detected by the AC voltmeter 200 and the current value i of the AC signal for measurement (measurement signal). , V / i is calculated to calculate the internal resistance r of the storage battery. Further, the control unit 400 determines the deterioration state of the storage battery based on the calculated internal resistance value of the storage battery and displays the result on the display unit 410.

  Next, a method for measuring the power storage device will be described with reference to FIGS. Note that the measurement target here is, for example, a storage battery group G in which three storage batteries B1, B2, and B3 are connected in series, and output electrodes T1 and T2 are drawn from both ends thereof.

  First, one current supply probe 110 of the AC current source 100 and one DC voltage detection probe 310 of the DC voltmeter 300 are connected to the output electrode T1, and the other current supply probe 120 of the AC current source 100 and the DC voltmeter 300 are connected. The other DC voltage detection probe 320 is connected to the output electrode T2, and an AC signal for measurement is applied from the AC current source 100 to the storage battery group G so that the DC voltage of the storage battery group G can be measured by the DC voltmeter 300. To.

  Then, if the internal resistance of each storage battery B is measured in order, for example, as shown in FIG. 2, first, the AC voltage detection probes 210 and 220 of the AC voltmeter 200 are brought into contact with both ends of the storage battery B1 and measured. The voltage generated in the storage battery B1 by the AC signal for use is measured, and the internal resistance r1 of the storage battery B1 is calculated from the current value i of the AC signal and the measured voltage v.

  When the measurement of the internal resistance of the storage battery B1 is completed, as shown in FIG. 3, the AC voltage detection probes 210 and 220 of the AC voltmeter 200 are brought into contact with both ends of the next storage battery B2, and the storage battery B2 The internal resistance r2 is calculated. This operation is also performed for the storage battery B3 to calculate its internal resistance r3.

  Since the current supply probes 110 and 120 and the DC voltage detection probes 310 and 320 are continuously connected to the output electrodes T1 and T2 during the measurement of the internal resistance of the storage battery B, the hands-free type such as clip type, screw type, clamp type, etc. A probe is preferred.

  As described above, according to the present invention, when measuring the internal resistance r of each storage battery B, only the AC voltage detection probes 210 and 220 of the AC voltmeter 200 need be moved. Probing can be performed easily.

  Also, the probe replacement frequency can be kept low. Moreover, since the internal resistance measurement of each storage battery B and the DC voltage measurement of the entire power storage device can be performed at a time, the number of inspection steps for deterioration of the storage battery can be reduced.

  Next, with reference to FIG. 4 to FIG. 6, a probe support means preferable for efficiently performing the above internal resistance measurement work will be described. In addition, the storage battery group G in FIG. 4 includes n storage batteries B1 to Bn connected in series in a straight line by a plurality of short-circuit plates S. Let X be. The output electrodes T1 and T2 are made of an electrode extraction plate.

  The probe support means includes a guide rail 510 disposed above the storage battery group G and parallel to the installation surface X of the storage battery group G. The guide rail 510 has a length equal to or longer than the distance between the output electrodes T1 and T2. In this embodiment, the guide rail 510 is an elevating unit on the base frame 500 whose both ends form a skeleton of the probe support unit. It is supported via an air cylinder 540. As the elevating means, a hydraulic cylinder, a feed screw shaft or the like may be used instead of the air cylinder.

  Four probe support portions 521, 522, 531, and 532 are slidably attached to the guide rail 510. Among these, the probe support portions 521 and 522 are for two support, and the probe support portions 531 and 532 are for one support.

  That is, two probes, one current supply probe 110 of the AC current source 100 and one DC voltage detection probe 310 of the DC voltmeter 300, are supported by the probe support unit 521. Similarly, the probe support unit 522 has an AC signal. Two probes, the other current supply probe 120 of the current source 100 and the other DC voltage detection probe 320 of the DC voltmeter 300 are supported.

  On the other hand, one AC voltage detection probe 210 of the AC voltmeter 200 is supported by the probe support portion 531, and the other AC voltage detection probe 220 of the AC voltmeter 200 is supported by the probe support portion 532. Supported.

  The probe support portions 521 and 522 and the probe support portions 531 and 532 have basically the same configuration except for the number of supported probes. As a typical example, a cross section of the probe support portion 531 is shown in FIG.

  The probe support 531 is made of an electrical insulating material such as synthetic resin, and includes a box-shaped sliding body 530 that slides along the guide rail 510. An AC voltage detection probe 210 is slidably inserted vertically into the bottom of the sliding body 530.

  The AC voltage detection probe 210 has a head portion 210a as a retaining member, and a compression coil spring C that contacts the head portion 210a and constantly urges the AC voltage detection probe 210 downward in the sliding body 530. It is stored.

  AC voltage detection probe 210 is connected to AC ammeter 200 via a lead wire including compression coil spring C and coupling capacitor 231. The other probe support portions 521, 532, and 522 have substantially the same configuration.

  On the guide rail 510, the probe support portions 521 and 522 are disposed on both sides, and the probe support portions 531 and 532 are disposed therebetween. For example, in order to measure the internal resistance r2 of the storage battery B2, an ascent command is given to the air cylinder 540 to raise the guide rail 510 to a height position where each probe is separated from the battery group G.

  Then, the probe support portions 521, 531, 532, and 522 are manually moved so that one current supply probe 110 and the DC voltage detection probe 310 are placed on the electrode plate of the output electrode T1, and the AC voltage detection probes 210 and 220 are stored in the storage battery. The other current supply probe 120 and the DC voltage detection probe 320 are positioned on the electrode plate of the output electrode T2 on the short-circuit plates S and S on both sides of B2.

  Thereafter, a lowering command is given to the air cylinder 540 to lower the guide rail 510, and the probes 110 and 310 are output to the output electrode T1, the probes 210 and 220 are output to the short-circuited versions S and S of the storage battery B2, and the probes 320 and 120 are output. Each of the electrodes T2 is contacted, a measurement current is supplied from the alternating current source 100 to the battery group G, the voltage between the terminals of the storage battery B2 is measured by the alternating current voltmeter 200, and the storage battery B2 is obtained from the measurement current i and the voltage between the terminals v. And the DC voltage voltmeter 300 measures the voltage of the battery group G itself.

  Next, for example, in order to measure the internal resistance r3 of the adjacent storage battery B3, the guide rail 510 is raised to a predetermined height, and the positions of the probe support portions 521 and 522 on both sides are left as they are, as described above. After the parts 531 and 532 are moved to the right side by one storage battery in FIG. 4, the guide rail 510 may be lowered.

  In order to automatically move the probe support portions 531 and 532 and measure the internal resistance r of each storage battery B, rack teeth 511 are formed on the guide rail 510 and the probe support portion 531 is formed as shown in FIG. , 532 is provided with a pinion gear 512 that is driven by a motor (not shown) and meshes with the rack teeth 511.

  Then, the control unit 400 (see FIG. 1) gives a driving control signal to the motor for pinion driving and the air cylinder 540 for raising and lowering the guide rail, and ascends the guide rail 510 → the probe support portions 531 and 532 The steps of movement → lowering of the guide rail 510 → supply of measurement current / AC voltage measurement → raising of the guide rail 510 may be performed.

  The probe support portions 521 and 522 on both sides can be automatically moved by applying the above-described pinion / rack mechanism. In place of the pinion / rack mechanism, a ball screw including a screw shaft, a nut, a ball, or the like, or a linear moving mechanism using a linear motor table may be applied.

  In the case of using a ball screw, as shown in FIG. 7, two ball screws 611 and 612 are installed on the guide rail 510 so as to be parallel to each other along the extending direction, and one of the ball screws 611 is used for alternating current. The probe support 531 having the voltage detection probe 210 may be driven reciprocally, and the probe support 532 having the AC voltage detection probe 220 may be driven reciprocally by the other ball screw 612.

  In the case of using a linear motor table, as shown in FIG. 8, a twin table type linear motor table, that is, a linear motor table 620 having two moving tables 621 and 622 along the extending direction of the guide rail 510. The probe support portion 531 having the AC voltage detection probe 210 is mounted on one moving table 621, and the probe support portion 532 having the AC voltage detection probe 220 is mounted on the other moving table 622.

DESCRIPTION OF SYMBOLS 100 AC current source 110,120 Current supply probe 200 AC voltmeter 201,220 1st voltage detection probe (AC voltage detection probe)
300 DC voltmeter 310, 320 Second voltage detection probe (DC voltage detection probe)
400 control unit 500 base frame of probe support means 510 guide rail 521, 522, 531, 532 probe support part 540 air cylinder (lifting means)
611,612 Ball screw 620 Linear motor table 621,622 Moving table B (B1-Bn) Storage battery S Short-circuit plate T1, T2 Output electrode

Claims (9)

In a method for measuring a power storage device having a power storage device including a storage battery group in which a plurality of storage batteries are connected in series as a measurement target,
An AC current source having a pair of current supply probes, an AC voltmeter having a pair of first voltage detection probes, and a DC voltmeter having a pair of second voltage detection probes,
The current supply probe and the second voltage detection probe are brought into contact with one output electrode and the other output electrode of the storage battery group, respectively, and an AC current for measurement is applied to the storage battery group from the AC current source. And measuring the direct-current voltage of the entire storage battery group with the direct-current voltmeter, and alternately contacting the first voltage detection probe with the terminals of the individual storage batteries in the storage battery group in turn. And measuring the internal resistance of the power storage device.   The method of measuring a power storage device according to claim 1, wherein a hands-free probe that is held by hand and does not need to be brought into contact with an electrode is used for the current supply probe and the second voltage detection probe. In a measuring device for a power storage device whose target is a power storage device including a storage battery group in which a plurality of storage batteries are connected in series,
An AC current source having a pair of current supply probes, an AC voltmeter having a pair of first voltage detection probes, and a DC voltmeter having a pair of second voltage detection probes,
The current supply probe and the second voltage detection probe are brought into contact with one output electrode and the other output electrode of the storage battery group, respectively, and an AC current for measurement is applied to the storage battery group from the AC current source. And measuring the direct-current voltage of the entire storage battery group with the direct-current voltmeter, and alternately contacting the first voltage detection probe with the terminals of the individual storage batteries in the storage battery group in turn. When measuring the internal resistance of
As a probe support means, it has a guide rail for moving the probe arranged above the storage battery group over at least one output electrode and the other output electrode of the storage battery group, and the current supply probe, A power storage device measuring apparatus, wherein the first voltage detection probe and the second voltage detection probe are movably supported.   The said probe support means is equipped with the raising / lowering means to which the said guide rail is moved to the raising position which each said probe leaves | separates from the said storage battery group, and the falling position which contacts the said storage battery group, The said 3rd aspect is characterized by the above-mentioned. Measuring device for power storage device.   The probe support means includes a first probe support portion for supporting two probes of the one current supply probe and the second voltage detection probe, and a pair of the current supply probe and the second voltage detection probe. A second probe supporting part for supporting two probes; a third probe supporting part for supporting the one first voltage detection probe alone; and a fourth probe for supporting the other first voltage detection probe alone. 5. The power storage device measuring apparatus according to claim 3, further comprising a support portion, wherein each of the first to fourth probe support portions is slidably supported by the guide rail. 6.   6. The electricity storage according to claim 5, wherein the probe support means includes probe moving means for individually moving at least the third probe support part and the fourth probe support part along the guide rail. Equipment measuring device.   7. The power storage device measurement according to claim 6, wherein the probe moving means includes rack teeth formed on the guide rail side and a motor driven pinion gear provided on the probe support side. apparatus.   The probe moving means comprises two ball screws arranged on the guide rail so as to be parallel to each other along the extending direction of the guide rail, and the third probe support portion is formed by the one ball screw. The power storage device measuring apparatus according to claim 6, wherein the power storage device is driven reciprocally and the fourth probe support portion is reciprocally driven by the other ball screw.   The probe moving means comprises a linear motor table having two moving tables provided on the guide rail along the extending direction of the guide rail, and the third probe support portion is mounted on the one moving table. The power storage device measuring apparatus according to claim 6, wherein the fourth probe support portion is mounted on the other moving table.

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