JP2008192532A - Activation method of secondary battery, activation device, activation pulse frequency measuring device, and charging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an activation method of a secondary battery capable of surely and efficiently aiming at activation regardless of a deterioration degree, to provide an activation device, to provide an activation pulse frequency measuring device, and to provide a charging device. <P>SOLUTION: Measuring pulse voltage is impressed on a lead storage battery with frequencies of the measuring pulse voltage changed in a whole range of the lowest frequency fmin to the highest frequency fmax, and a current value flowing in the lead storage battery is measured by the measuring pulse voltage to find the maximum frequency at which the current value is to be maximum. And, an activation pulse voltage of the maximum frequency found is added to the lead storage battery. Then, the maximum frequency obtained by the measuring becomes a resonant frequency of the lead storage battery, so that large activation current can be made to flow in the lead storage battery, crystal coating of lead sulfate can be efficiently removed, and therefore, activation of the lead storage battery 2 can be surely and efficiently aimed at. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a secondary battery activation method, an activation device, an activation pulse frequency measurement device, and a charging device that can be used to activate a deteriorated secondary battery.

2. Description of the Related Art Secondary batteries such as lead-acid batteries that can be used repeatedly as long as the stored electrical energy is discharged and the electrical energy is stored again by charging again have been used.
Such a secondary battery generates reversible electrochemical reaction inside by charging and accumulates electric energy. Therefore, the ease of the electrochemical reaction, that is, the electrochemical property of the secondary battery. When the activity decreases, various performances such as discharge capacity, output characteristics, cycle charge / discharge characteristics, and safety of the secondary battery also decrease.
The electrochemical activity of the secondary battery decreases due to the formation of a non-conductive crystal film on the surface of the electrode or oxidation of the surface of the electrode. Generally, the secondary battery is repeatedly charged and discharged repeatedly. Or, it gradually decreases due to aging.

In a lead-acid battery, which is a secondary battery, one of the causes of a decrease in electrochemical activity is that non-conductive crystals of lead sulfate adhere to the surface of the electrode to form a film, and gradually It is mentioned that the internal resistance increases due to sulfation, which is a phenomenon covering the surface.
For this reason, the electrochemical activity of the secondary battery can be restored by removing the nonconductive crystal film formed on the surface from the electrode.
Here, there is known a nonconductive crystal film removal apparatus that activates a secondary battery such as a lead storage battery by removing a nonconductive crystal film by applying a predetermined voltage to the secondary battery.
According to this nonconductive crystal film removing apparatus, a predetermined voltage is applied between the positive electrode and the negative electrode of the secondary battery, and a current having a predetermined waveform is conducted inside the secondary battery, whereby the electrode is electrically connected. The internal resistance can be reduced by applying a static shock and destroying the non-conductive crystal coating (eg, lead sulfate crystal coating) formed on the surface of the electrode, thereby removing the non-conductive crystal coating from the electrode. The secondary battery can be activated (see, for example, Patent Document 1).
JP 2004-342567 A

In the non-conductive crystal film removing apparatus as described above, when removing the non-conductive crystal film from the electrode, a voltage having a constant frequency is applied between the positive electrode and the negative electrode of the secondary battery. Even if the secondary battery has the same capacity, the internal AC impedance of the secondary battery differs depending on the degree of deterioration in the secondary battery, in other words, the degree that the electrode surface is covered with the nonconductive crystal film. When a voltage is applied at a constant frequency, there is a problem that a sufficiently large current cannot be conducted inside the secondary battery, and activation cannot be achieved sufficiently depending on the degree of deterioration.
Such a problem is not limited to lead-acid batteries, but is a problem when activating secondary batteries such as nickel-cadmium batteries and nickel-metal hydride batteries that deteriorate due to an increase in internal resistance.

If the voltage applied between the positive electrode and the negative electrode of the secondary battery is increased, a sufficiently large current can be conducted inside the secondary battery even if the internal AC impedance of the secondary battery is large. It is difficult to accurately measure the AC impedance, and if the size of the internal AC impedance is wrong, an excessive current flows through the secondary battery, causing a problem that the electrode of the secondary battery is damaged.
Accordingly, each invention described in each claim has been made in view of the above-described problems of the prior art, and the object is to ensure activation regardless of the degree of deterioration. It is another object of the present invention to provide a secondary battery activation method, activation device, activation pulse frequency measurement device, and charging device that can be sufficiently achieved.

Each invention described in each claim is made to achieve the above-mentioned object. The features of each invention will be described below with reference to the embodiments of the invention shown in the drawings.
In addition, a code | symbol shows the code | symbol used in embodiment of invention, and does not limit the technical scope of this invention.
(Claim 1)
(Feature point)
The present invention described in claim 1 has been accomplished based on this finding by the present applicant, who found that the internal resistance of the secondary battery is an AC impedance and that activation can be efficiently performed by applying a pulse voltage having a resonance frequency. It is characterized by the following points.

That is, the invention described in claim 1 is a method for activating a secondary battery (2) in which an activation pulse voltage for activating the secondary battery (2) is applied to the secondary battery (2). In addition, a predetermined voltage is applied to the secondary battery (2) while changing the frequency over the entire range from the preset minimum frequency to the maximum frequency, and the current value flowing through the secondary battery (2) After determining the maximum frequency at which the current value is maximum, the activation pulse voltage at the maximum frequency is applied to the secondary battery (2).
(Claim 2)
(Feature point)
The invention described in claim 2 is the invention described in claim 1, and has the following characteristic points.

That is, the invention described in claim 2 is the current value measured when the current value flowing through the secondary battery (2) is measured over the entire frequency range from the lowest frequency to the highest frequency set in advance. If the vertical fluctuation range does not exceed a predetermined range, even if the current value becomes maximum in the vertical fluctuation, the frequency at which the current value becomes maximum is ignored, and the vertical fluctuation range is preset. When the frequency exceeds the predetermined range, the frequency at which the current value becomes maximum is adopted as the maximum frequency.
(Claim 3)
(Feature point)
The invention described in claim 3 is the invention described in claim 1 or 2, and has the following characteristic points.

That is, the invention described in claim 3 measures the current value flowing through the secondary battery (2) over the entire frequency range from the lowest frequency to the highest frequency set in advance, and maximizes the current value. When the frequency is obtained and multiple maximum frequencies at which the current value is maximum are measured, the maximum frequency with the largest difference from the top to the bottom of the current value that changes in a mountain shape near the maximum value is adopted. A frequency activation pulse voltage is applied to the secondary battery (2).
(Claim 4)
(Feature point)
The invention described in claim 4 is the invention described in any one of claims 1 to 3 described above, and has the following characteristic points.

That is, the invention according to claim 4 is directed to the secondary battery (2) immediately after the activation pulse voltage having the maximum frequency obtained is applied to the secondary battery (2) in order to activate the secondary battery (2). ) Charging is started.
(Claim 5)
(Feature point)
The invention according to claim 5 is based on the knowledge that, when the activation pulse voltage of the resonance frequency is applied to the secondary battery (2), the activation can be performed efficiently, similarly to the invention according to claim 1. There are the following features.

  That is, the invention described in claim 5 activates the secondary battery (2) in which an activation pulse voltage for activating the deteriorated secondary battery (2) is applied to the secondary battery (2). Voltage application means (12) for applying a predetermined measurement voltage to the secondary battery (2) while changing the frequency over the entire range from the lowest frequency to the highest frequency set in advance in the device (10) And a current measuring means (23) for measuring a current value flowing through the secondary battery (2) when the voltage applying means (12) applies a measurement voltage, and a preset minimum frequency to a maximum frequency. Storage means (31) for storing current value measurement data indicating a change in current value with respect to a change in frequency, including the current value measured by the current measurement means (23) over the entire frequency range up to Based on the current value measurement data stored in the storage means (31) The maximum frequency detection means (41) for detecting the maximum frequency where the current value becomes maximum between the preset minimum frequency and the maximum frequency, and the activity of the maximum frequency detected by the maximum frequency detection means (41) And an activation pulse voltage generating means (11) for applying the activation pulse voltage to the secondary battery (2).

(Claim 6)
(Feature point)
The invention described in claim 6 is the invention described in claim 5 described above, and has the following characteristic points.
That is, the invention described in claim 6 is the current value measured when the current value flowing through the secondary battery (2) is measured over the entire frequency range from the lowest frequency to the highest frequency set in advance. In the case where the vertical fluctuation range does not exceed a predetermined range, even if a current value that is a maximum in the vertical fluctuation is detected, the frequency at the detected current value is canceled as noise. Noise cancellation means (44) is provided, and the maximum frequency detection means (41) is canceled by the noise cancellation operation of the noise cancellation means (44) because the vertical fluctuation range exceeds a predetermined range set in advance. The frequency that has not been used is adopted as the maximum frequency.

(Claim 7)
(Feature point)
The invention described in claim 7 is the invention described in claim 5 or 6 described above, and has the following characteristic points.
That is, the invention described in claim 7 measures the value of the current flowing through the secondary battery (2) over the entire frequency range from the lowest frequency to the highest frequency set in advance, and maximizes the current value. Detects the frequency, and if multiple local maximum frequencies are detected, select the frequency with the largest difference from the top to the bottom of the current value that changes in a mountain shape near the local maximum as the local maximum. Maximum frequency selection means (46) is provided, and the activation pulse voltage generation means (11) applies the activation pulse voltage of the maximum frequency selected by the maximum frequency selection means (46) to the secondary battery (2). It is characterized by being.

(Claim 8)
(Feature point)
The invention according to claim 8 can be activated efficiently when an activation pulse voltage having a resonance frequency is applied to the secondary battery (2), similarly to the inventions according to claim 1 and claim 5. It is based on knowledge and has the following features.
That is, in the invention described in claim 8, when an activation pulse voltage for activating the secondary battery (2) is applied to the secondary battery (2) at a predetermined frequency, the secondary battery ( 2) A device for measuring the activation pulse frequency of the secondary battery (2) that performs the measurement for obtaining the frequency of the activation pulse voltage to be applied to the frequency range, from the preset minimum frequency to the maximum frequency. A voltage application means (12) for applying a predetermined measurement voltage to the secondary battery (2) while changing the frequency throughout, and when the voltage application means (12) applies the measurement voltage, the secondary battery ( 2) Current measurement means (23) for measuring the current value flowing in the current range, and the current value measured by the current measurement means (23) over the entire frequency range from the lowest frequency to the highest frequency set in advance. And the current value for the change in frequency Based on the current value measurement data stored in the storage means (31) and the current value measurement data stored in the storage means (31), the storage means (31) for storing the current value measurement data indicating the change, And a maximum frequency detecting means (41) for detecting a maximum frequency at which the current value is maximized.

(Claim 9)
(Feature point)
A ninth aspect of the present invention is a charging device using the secondary battery activating device according to the fifth aspect of the present invention, and is characterized by the following points.
That is, the invention described in claim 9 is a secondary battery (2) having a function of applying an activation pulse voltage for activating the deteriorated secondary battery (2) to the secondary battery (2). In order to conduct a charging current for charging to the secondary battery (2), a predetermined DC voltage is applied to the secondary battery (2) and a DC voltage applying means (4) A voltage applying means (12) for applying a predetermined measurement voltage to the secondary battery (2) while changing the frequency over the entire range from the lowest frequency to the highest frequency set in advance, and this voltage applying means ( 12) Current measurement means (23) for measuring the current value flowing in the secondary battery (2) when the measurement voltage is applied, and the entire frequency range from the lowest frequency to the highest frequency set in advance Including the current value measured by the current measuring means (23) A storage means (31) for storing current value measurement data indicating a change in current value with respect to a change in number, and a preset minimum frequency based on the current value measurement data stored in the storage means (31) Maximum frequency detection means (41) for detecting a maximum frequency where the current value is maximum between the maximum frequency and the maximum frequency activation pulse voltage detected by the maximum frequency detection means (41) is a secondary battery ( 2) an activation pulse voltage generating means (11) to be applied to the secondary battery (2) while the DC voltage applying means (4) is applying a predetermined DC voltage to the secondary battery (2). The generation means (11) is formed so that the activation pulse voltage can be applied to the secondary battery (2) by superimposing the activation pulse voltage on the DC voltage of the DC voltage application means (4).

(Effect of Claim 1)
The present invention configured as described above has the following effects.
That is, in the first aspect of the invention, the minimum frequency and the maximum frequency in a range where the resonance frequency of the secondary battery can exist are set in advance, and the frequency is changed over the entire range from the set minimum frequency to the maximum frequency. While applying a predetermined voltage to the secondary battery, the current value flowing through the secondary battery is measured, and the maximum frequency at which the current value increases to a sharp mountain shape and becomes a maximum is measured.
Here, since the maximum frequency obtained by such measurement becomes the resonance frequency of the secondary battery, the degree of deterioration of the secondary battery, for example, the electrode surface is covered with a nonconductive crystal coating in a lead storage battery or the like. Therefore, even if the value of the resonance frequency is unknown before measurement, the resonance frequency of the secondary battery can be determined reliably and accurately by measurement, and an activation pulse voltage at the resonance frequency must be applied. Thus, the activation current can be efficiently conducted to the secondary battery, and therefore, the secondary battery can be activated reliably and sufficiently regardless of the degree of deterioration.

The secondary battery activation method according to the present invention can be used for secondary batteries whose performance has deteriorated due to long-term use or secondary electromagnetics whose performance has deteriorated due to being left unused for a long time. In addition, the performance can be recovered and the deterioration can be prevented in advance by using the secondary battery such as a new secondary battery which has not deteriorated.
(Effect of claim 2)
According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the following effect is obtained.
That is, according to the invention described in claim 2, when the current value flowing through the secondary battery is measured while applying a predetermined voltage to the secondary battery while changing the frequency, the current to be measured is However, there are pulsations that fluctuate up and down, and many local maximum parts are generated as noise, but the current value is significantly larger at the frequency corresponding to the resonance frequency of the secondary battery than the local maximum part causing noise. Since the vertical fluctuation range of the measured current value does not exceed a preset predetermined range, the frequency at which the current value becomes the maximum even if the current value becomes the maximum in the vertical fluctuation is determined. By ignoring it, it is possible to extract the resonance frequency that needs to be measured from a large number of frequencies in the maximum part that causes noise, thereby reliably and accurately measuring the resonance frequency to be obtained. Rukoto can.

(Effect of claim 3)
According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the following effect can be obtained.
That is, depending on the type of secondary battery, there is a battery having a plurality of different numerical frequencies as the resonance frequency. For example, in a lead storage battery, each of a plurality of electrode plates forms a storage cell. If the degree of coverage with the non-conductive crystal coating on each surface of the plate is different, the resonance frequency for each electrode plate is also different, and thus has a plurality of different numerical frequencies as the resonance frequency. According to the invention described in Item 3, when a plurality of resonance frequencies are measured, the one having the largest difference from the top to the bottom of the current value that changes in a mountain shape in the vicinity of the maximum value is adopted, and the activity of this frequency is adopted. Since the activation pulse voltage is applied to the secondary battery, the largest current among the resonance frequencies obtained in this measurement can be conducted to the secondary battery, thereby activating the secondary battery. It can be achieved in real and sufficiently.

(Effect of claim 4)
According to invention of Claim 4, in addition to the effect of the invention in any one of Claim 1 to Claim 3 mentioned above, there exist the following effects.
That is, according to the fourth aspect of the present invention, in order to destroy the non-conductive crystal film, the charging of the secondary battery is started immediately after the activation pulse voltage having the maximum frequency obtained is applied to the secondary battery. Therefore, it is possible to prevent the deterioration-causing substances from being reformed. For example, in a lead-acid battery, non-conductive crystals that have been peeled off by applying an activation pulse voltage are decomposed and these non-conductive crystals are prevented from being formed again. It is also possible to prevent the electrode from being covered with the coating. Thereby, the activated state of the secondary battery can be maintained for a long time, and the life of the secondary battery can also be extended.

(Effect of Claim 5)
The present invention configured as described above has the following effects.
That is, according to the invention described in claim 5, since the voltage applying means capable of changing the frequency of the measurement voltage applied to the secondary battery is provided, the lowest frequency in the range where the resonance frequency of the secondary battery can exist is provided. A predetermined voltage can be applied to the secondary battery while changing the frequency up to the maximum frequency.
In addition, since the voltage applying means is provided with a current measuring means for measuring the current value flowing in the secondary battery when the measurement voltage is applied, the predetermined voltage is changed while changing the frequency over the entire range from the lowest frequency to the highest frequency. Is applied to the secondary battery, and the current flowing through the secondary battery at each frequency can be measured.

Furthermore, since the maximum frequency detecting means for detecting the maximum frequency at which the current value becomes maximum between the lowest frequency and the highest frequency is provided, this increases the maximum frequency at which the current value increases to a sharp mountain shape and becomes the maximum. It can be detected automatically.
Here, since the maximum frequency obtained by the operation of the voltage application means, the current measurement means, and the maximum frequency detection means becomes the resonance frequency of the secondary battery, the degree of deterioration in the secondary battery, for example, in a lead storage battery, etc. Since the electrode surface varies depending on the degree of coverage with the non-conductive crystal coating, the resonance frequency of the secondary battery can be determined reliably and accurately by measurement even if the resonance frequency value is unknown before measurement. .

Since the activation pulse voltage generating means for applying the activation pulse voltage of the maximum frequency detected by the maximum frequency detection means to the secondary battery is provided, the activation pulse voltage of the resonance frequency is automatically applied to the secondary battery. By applying an activation pulse voltage having a resonance frequency, the activation current can be efficiently conducted to the secondary battery, and therefore, the activation of the secondary battery is ensured regardless of the degree of deterioration. In addition, the secondary battery can be activated automatically.
(Effect of claim 6)
According to the invention described in claim 6, in addition to the effect of the invention described in claim 5, the following effect is obtained.

  That is, according to the sixth aspect of the present invention, if the vertical fluctuation range of the measured current value does not exceed a predetermined range, a current value that is a maximum in the vertical fluctuation is detected. The noise canceling means for canceling the frequency at the detected current value as noise is provided, and when measuring the current value flowing through the secondary battery, the current to be measured has a pulsation that fluctuates finely up and down. Therefore, even if many local maxima occur as noise, the noise canceling means cancels the frequency at the local maxima for many local maxima that become noise, Therefore, the resonance frequency to be measured is automatically extracted, so that the resonance frequency to be obtained can be reliably and accurately measured.

(Effect of Claim 7)
According to the invention described in claim 7, in addition to the effect of the invention described in claim 5 or 6, the following effect is obtained.
That is, according to the seventh aspect of the present invention, the frequency having the largest difference from the top to the bottom of the current value changing in a mountain shape in the vicinity of the maximum value is selected as the maximum frequency among the plurality of measured maximum frequencies. Since the maximum frequency selection means is provided, even if the secondary battery has a plurality of different numerical frequencies as the resonance frequency, for example, each of the electrode plates stores electricity like a lead storage battery having a plurality of electrode plates. Since the degree to which the cells are formed and covered with the nonconductive crystal coating on each electrode plate is different, the maximum frequency selection means can be used even if a plurality of numerical frequencies exist as resonance frequencies. The maximum frequency with the largest difference from the top to the bottom of the current value changing in a mountain shape near the maximum value is automatically selected as the resonance frequency, and the activation pulse voltage of this frequency is applied to the secondary battery. Thus, among the activation pulse voltages having the resonance frequency obtained in this measurement, the largest current can be conducted to the secondary battery, and thereby the secondary battery can be activated reliably and sufficiently. Can do.

(Effect of Claim 8)
The present invention configured as described above has the following effects.
That is, according to the eighth aspect of the invention, since the voltage applying means capable of changing the frequency of the measurement voltage applied to the secondary battery is provided, the lowest frequency in the range where the resonance frequency of the secondary battery can exist is provided. A predetermined voltage can be applied to the secondary battery while changing the frequency over the entire range up to the maximum frequency.
In addition, since the voltage applying means is provided with a current measuring means for measuring the current value flowing through the secondary battery when the measurement voltage is applied, the predetermined voltage is applied while changing the frequency from the lowest frequency to the highest frequency. , The current flowing in the secondary battery at each frequency can be measured.

Furthermore, since the maximum frequency detecting means for detecting the maximum frequency at which the current value becomes maximum between the lowest frequency and the highest frequency is provided, this increases the maximum frequency at which the current value increases to a sharp mountain shape and becomes the maximum. It can be detected automatically.
Here, since the maximum frequency obtained by the operation of the voltage application means, the current measurement means, and the maximum frequency detection means becomes the resonance frequency of the secondary battery, the degree of deterioration in the secondary battery, for example, in a lead storage battery, etc. Since the electrode surface varies depending on the degree of coverage with the non-conductive crystal coating, the resonance frequency of the secondary battery can be determined reliably and accurately by measurement even if the resonance frequency value is unknown before measurement. .

(Effect of Claim 9)
The present invention configured as described above has the following effects.
That is, according to the ninth aspect of the invention, since the voltage applying means capable of changing the frequency of the measurement voltage applied to the secondary battery is provided, the lowest frequency in the range where the resonance frequency of the secondary battery can exist is provided. A predetermined voltage can be applied to the secondary battery while changing the frequency up to the maximum frequency.
In addition, since the voltage applying means is provided with a current measuring means for measuring the current value flowing in the secondary battery when the measurement voltage is applied, the predetermined voltage is changed while changing the frequency over the entire range from the lowest frequency to the highest frequency. Is applied to the secondary battery, and the current flowing through the secondary battery at each frequency can be measured.

Furthermore, since the maximum frequency detecting means for detecting the maximum frequency at which the current value becomes maximum between the lowest frequency and the highest frequency is provided, this increases the maximum frequency at which the current value increases to a sharp mountain shape and becomes the maximum. It can be detected automatically.
Here, since the maximum frequency obtained by the operation of the voltage application means, the current measurement means, and the maximum frequency detection means becomes the resonance frequency of the secondary battery, the degree of deterioration in the secondary battery, for example, in a lead storage battery, etc. Since the electrode surface varies depending on the degree of coverage with the non-conductive crystal coating, the resonance frequency of the secondary battery can be determined reliably and accurately by measurement even if the resonance frequency value is unknown before measurement. .

  Then, an activation pulse voltage generating means for applying the activation pulse voltage of the maximum frequency detected by the maximum frequency detection means to the secondary battery is provided, and a DC voltage application means for charging the secondary battery is provided in the secondary battery with a predetermined value. Since the activation pulse voltage of the activation pulse voltage generator is superimposed on the DC voltage of the DC voltage application means and applied to the secondary battery while the DC voltage is applied, the secondary battery is charged. However, the secondary battery can be activated and a larger current can be passed through the secondary battery by applying the activation pulse voltage than when the activation pulse voltage is applied alone. As a result, the current for destroying the non-conductive crystal coating can be made stronger, the non-conductive crystal coating can be more effectively destroyed, and the activation efficiency of the secondary battery can be further improved. Can do.

Further, according to the ninth aspect of the invention, the maximum frequency can be automatically detected by the maximum frequency detecting means while charging the secondary battery, and the activation pulse is charged while charging the secondary battery. Since the activation pulse voltage can be applied to the secondary battery by the voltage generating means, either the automatic detection of the maximum frequency and the application of the activation pulse voltage, regardless of whether the secondary battery is in the charged state or the discharged state. The automatic detection of the maximum frequency and the application of the activation pulse voltage can be alternately repeated with a predetermined period for the secondary battery.
For this reason, automatic detection and maximum frequency detection of secondary batteries used in situations where charging and discharging are performed as needed and sometimes charging and discharging are performed at the same time, for example, lead storage batteries installed in automobiles, If application of the activation pulse voltage is alternately repeated at a predetermined cycle, either charging or discharging is always performed, the internal state of the secondary battery changes, and the resonance frequency of the secondary battery also changes. However, the maximum frequency is automatically detected every predetermined period, and the frequency of the activation pulse voltage can be updated based on the result of the automatic detection to follow the change in the resonance frequency of the secondary battery. Thereby, destruction of a nonelectroconductive crystal | crystallization film can be performed more efficiently, and the efficiency of activation of a secondary battery can be improved further.

At this time, based on the detection result obtained by the previous automatic detection of the maximum frequency, the frequency that is the detection result of this time is predicted, and when starting the automatic detection of the maximum frequency, The predicted maximum frequency may be applied as the frequency to be applied, and thereby each time the maximum frequency is automatically detected, the range from the lowest frequency to be set in advance may be narrowed. In this way, finally, the maximum frequency can be detected by applying only a few maximum frequency detection pulses predicted at the start of automatic detection of the maximum frequency to the secondary battery.
When activating the secondary battery at the resonance frequency obtained in this way, several activation pulses can be applied to the secondary battery, and only a few detection pulses are applied. If the automatic detection of the maximum frequency to be applied and the automatic application of the activation pulse voltage to apply only a few activation pulses are repeated alternately, the automatic detection of the maximum frequency and the application of the activation pulse voltage are alternated. Can be performed in a short cycle, and the followability to the resonance frequency of the secondary battery can be improved.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment that is the best mode for carrying out the present invention will be described with reference to the drawings.
1 to 3 show this embodiment. FIG. 1 is a block diagram illustrating a schematic configuration of a charging device according to the present embodiment, FIG. 2 is a block diagram illustrating a schematic configuration of an activation device according to the present embodiment, and FIG. 3 is a resonance frequency according to the present embodiment. It is a block diagram which shows schematic structure of a measurement control part.
The charging device 1 according to the present embodiment has a function of activating the lead storage battery 2 deteriorated by sulfation in addition to the function of charging the lead storage battery 2 as a secondary battery with power received from a commercial power source. ing.

More specifically, the performance of the lead storage battery 2 deteriorates due to the sulfation phenomenon.
Here, the sulfation phenomenon means that the lead sulfate dissolved in the electrolyte solution becomes saturated due to the discharge of the lead storage battery 2 and further crystallizes due to a temperature drop or the like, and the crystallized lead sulfate is applied to the electrode surface. It refers to a phenomenon that adheres and forms a film, forms a non-conductive crystal film that does not conduct electricity, covers the electrode surface, increases the internal resistance of the lead-acid battery 2, and decreases its performance.
As shown in FIG. 1, such a charging device 1 includes a step-down unit 3 including a step-down transformer for stepping down a power supply voltage of a commercial power source that can be taken out from a household outlet, and the step-down unit. A rectifying unit 4 that rectifies the AC voltage stepped down by 3 into a DC voltage, an activating unit 10 that is an activating device for activating the deteriorated lead-acid battery 2, and an activating unit 10 in the DC circuit of the rectifying unit 4. And a coupling transformer 5 for superimposing an AC voltage for activation on a lead storage battery 2 to which a DC voltage is applied for charging.

In the charging device 1 having such a schematic configuration, the activation unit 10 is connected to the lead storage battery 2 via the coupling transformer 5, whereby the lead storage battery 2 is charged while charging the lead storage battery 2 with the DC power from the rectification unit 4. 2 resonance frequency measurement or activation processing can be performed.
On the other hand, since the activation unit 10 is coupled to the lead storage battery 2 via the coupling transformer 5 in the charging device 1, the charging process of the lead storage battery 2 is performed without the resonance frequency measurement and the activation process of the storage battery 2. It can also be performed alone. In addition, the charging device 1 can perform the resonance frequency measurement of the lead storage battery 2 and the activation process of the lead storage battery 2 independently.
The activation unit 10 obtains the resonance frequency of the lead storage battery 2 by measurement, and activates the lead storage battery 2 with an activation pulse voltage of the resonance frequency obtained by measurement.

More specifically, the activation unit 10 applies a predetermined measurement pulse voltage to the lead storage battery 2 while changing the frequency over the entire range from the lowest frequency to the highest frequency set in advance. The maximum current at which the current value reaches a maximum is obtained, and this maximum frequency is used as the resonance frequency of the lead storage battery 2.
In addition, the activation unit 10 applies the activation pulse voltage of the resonance frequency obtained by the measurement to the lead storage battery 2, and this activation pulse voltage causes the non-conductivity of lead sulfate coated on the electrode surface of the lead storage battery 2. The lead storage battery 2 is activated by destroying and removing the crystal coating.
As shown in FIG. 2, the activation unit 10 includes an activation pulse voltage generation unit 11 that generates an activation pulse voltage, a measurement pulse voltage generation unit 12 that generates a measurement pulse voltage, A current measurement control unit 20 for controlling the operation of the activation pulse voltage generation unit 11 and the measurement pulse voltage generation unit 12 and a switching unit 13 for switching the current measurement operation and activation operation of the lead storage battery 2. Is provided.

Among these, the switching unit 13 determines the destination of the trigger signal output from the current measurement control unit 20 according to the switching command signal of the current measurement control unit 20, and the activation pulse voltage generation unit 11 and the measurement pulse voltage generation unit 12 Is switched from one to the other.
In response to a switching command signal from the current measurement control unit 20, the switching unit 14 selects a pulse voltage source to be sent to the lead storage battery 2 from one of the activation pulse voltage generation unit 11 and the measurement pulse voltage generation unit 12 to the other. To switch to.
The activation pulse voltage generator 11 includes a power control switching element (not shown) that operates in synchronization with the trigger signal from the current measurement controller 20, and an induction coil (not shown) for boosting the voltage. . When receiving a trigger signal from the current measurement control unit 20, the switching element for power control of the activation pulse voltage generation unit 11 instantaneously cuts off the current on the primary side of the induction coil, thereby the secondary side of the induction coil A relatively high-voltage activation pulse voltage is applied to the electrode of the lead storage battery 2 connected to.

Like the activation pulse voltage generator 11, the measurement pulse voltage generator 12 includes a power control switching element (not shown) that operates in synchronization with the trigger signal from the current measurement controller 20, and an illustration for boosting the voltage. And an induction coil that does not. When receiving a trigger signal from the current measurement control unit 20, the switching element for power control of the activation pulse voltage generation unit 11 instantaneously cuts off the current on the primary side of the induction coil, thereby the secondary side of the induction coil A measurement pulse voltage is generated in the lead coil 2 and a measurement current is conducted to the lead storage battery 2 connected to the secondary side of the induction coil.
The current measurement control unit 20 generates a trigger signal to be sent to the activation pulse voltage generation unit 11 and the measurement pulse voltage generation unit 12, and when the measurement pulse voltage generation unit 12 applies the measurement pulse voltage to the lead storage battery 2. The current flowing through the lead storage battery 2 is measured.

Such a current measurement control unit 20 includes a voltage control oscillation unit 21 that oscillates a sawtooth wave that is a source of a trigger signal, a waveform shaping unit 22 that performs waveform shaping of a sawtooth wave oscillated by the voltage control oscillation unit 21, and A current measuring unit 23 as a current measuring means for measuring a current flowing through the lead storage battery 2 when a measurement pulse voltage is applied to the lead storage battery 2, and a resonance frequency is calculated based on a current value measured by the current measuring unit 23 In addition, a resonance frequency calculation control unit 30 that controls the oscillation frequency of the voltage controlled oscillation unit 21 is provided.
The voltage controlled oscillating unit 21 can change the oscillation frequency of the sawtooth wave to be output within a predetermined range, for example, a range of 1 kHz to 14 kHz, according to the voltage value of the input control voltage signal. It is an oscillator.

The waveform shaping unit 22 shapes the sawtooth wave received from the voltage controlled oscillation unit 21 and outputs a trigger signal that is a rectangular pulse. Here, the waveform shaping unit 22 shapes the sawtooth wave to a pulse with a duty ratio of 5%, in other words, the voltage duration in one cycle is 5% of the whole and the non-voltage time is 95% of the whole. The needle-shaped waveform is shaped into a pulse and the needle-shaped pulse is output as a trigger signal.
Here, since the transmission frequency of the sawtooth wave output from the voltage controlled oscillation unit 21 changes in a predetermined range, for example, in the range of 1 kHz to 14 kHz, the trigger signal output from the waveform shaping unit 22 according to this. Is also changed within a predetermined range, for example, a range of 1 kHz to 14 kHz.

The activation pulse voltage generator 11 can change the oscillation frequency of the activation pulse voltage to be output within a predetermined range, for example, a range of 1 kHz to 14 kHz, according to the transmission frequency of the received trigger signal. It has become.
Further, the measurement pulse voltage generator 12 changes the transmission frequency of the output measurement pulse voltage within a predetermined range, for example, a range of 1 kHz to 14 kHz, according to the transmission frequency of the received trigger signal. Yes.
In the above, the measurement pulse voltage generator 12 applies a measurement pulse voltage, which is a predetermined measurement voltage, to the lead storage battery 2 while changing the frequency over the entire range from the preset minimum frequency to the maximum frequency. Application means.

The current measuring unit 23 is connected to the lead storage battery when the measurement pulse voltage generating unit 12 applies the measurement pulse voltage via the current transformer 15 attached to the cable extending from the measurement pulse voltage generating unit 12 toward the lead storage battery 2. 2 to measure the current flowing through In other words, when the current measurement unit 23 receives a signal output from the current transformer 15 according to the current flowing through the lead storage battery 2, the current measurement unit 23 controls the resonance frequency calculation control of a predetermined measurement value signal indicating the current value flowing through the lead storage battery 2. This is sent to the unit 30.
The resonant frequency calculation control unit 30 shifts the voltage value of the control voltage signal output to the voltage controlled oscillation unit 21 at a predetermined pitch after switching the connection of the switching units 13 and 14 to the measurement pulse voltage generation unit 12 side. The sawtooth wave transmission frequency output from the voltage controlled oscillation unit 21 is shifted, for example, at a pitch of 100 Hz, whereby the transmission frequency of the trigger signal output from the measurement pulse voltage generation unit 12 is, for example, 100 Hz. The voltage value measured by the current measuring unit 23 is stored for each frequency that is shifted and changed by the pitch.

And the resonant frequency calculation control part 30 measures the electric current value which flows into the lead acid battery 2 over the whole range of the frequency range which changes in a predetermined range, for example, the range of 1 kHz or more and 14 kHz or less, and uses the electric current value measured at each frequency. After memorizing and memorizing all current values in the entire frequency range to be measured, in other words, memorizing measured current value data formed by these current values, and then maximizing based on memorized measured current value data The maximum frequency is calculated.
Further, when the calculation of the maximum frequency is finished, the resonance frequency calculation control unit 30 switches the connection of the switching units 13 and 14 to the activation pulse voltage generation unit 11 side, and then voltage-controlled oscillation of the calculated sawtooth wave of the maximum frequency To output the maximum frequency trigger signal from the waveform shaping unit 22, thereby generating the activation pulse voltage of the maximum frequency from the activation pulse voltage generation unit 11 and applying it to the lead storage battery 2. It has become.

In the above, the activation pulse voltage generation unit 11 has the maximum frequency activation pulse detected by the maximum frequency calculation unit 40 (to be described later) provided in the resonance frequency calculation control unit 30 in order to destroy the nonconductive crystal film. This is an activation pulse voltage generating means for applying a voltage to the lead storage battery 2.
Next, the resonance frequency calculation control unit 30 will be described in more detail.
The resonance frequency calculation control unit 30 has a function of presetting the change pitch and changeable region for the transmission frequency of the measurement pulse voltage to be changed when measuring the current flowing in the lead storage battery 2, and the above-described current. It has a function to remove noise generated during measurement.

In other words, the resonance frequency calculation control unit 30 measures the current flowing through the lead storage battery 2 while increasing the transmission frequency of the measurement pulse voltage, and when the measurement pulse voltage is output from the measurement pulse voltage generation unit 12, Transmission frequency change pitch and changeable range, here, the rate of increase when increasing the transmission frequency when moving from one current measurement to the next current measurement, and the fluctuation range from the lowest frequency to the highest frequency Has a function for setting in advance.
Further, when measuring the above-described current, the resonance frequency calculation control unit 30 generates many local maximum values of noise that cause the current to become maximum due to noise in addition to the true maximum value at which the current becomes maximum at the maximum frequency. Therefore, it has a function of removing a maximum value of unnecessary noise and thereby quickly obtaining a required maximum frequency.

  In such a resonance frequency calculation control unit 30, as shown in FIG. 3, a storage unit 31 for storing a current value measured by the current measurement unit 23, a current value stored in the storage unit 31, etc. The resonance frequency of the lead storage battery 2 is obtained based on the above, and the maximum frequency calculation unit 40 that outputs a resonance frequency signal indicating the obtained resonance frequency, and the increase rate and fluctuation range related to the transmission frequency of the measurement pulse voltage are set and held. Frequency increase rate fluctuation range setting unit 32 for generating, frequency designation signal generating unit 33 for generating a control voltage signal sent to voltage controlled oscillation unit 21, and current measurement operation and activation operation in resonance frequency calculation control unit 30 Are provided with an operation changeover switch unit 34, 35, 36 for switching the operation, and a control unit 37 for controlling the operation of the storage unit 31, the maximum frequency calculation unit 40, the operation changeover switch unit 34, 35, 36, etc. It has been.

The storage unit 31 includes a current value measured by the current measurement unit 23 over the entire frequency range from the lowest frequency to the highest frequency set in advance, and a current value indicating a change in the current value with respect to a change in frequency. Storage means for storing measurement data.
An operation changeover switch unit 34 is provided on the input side of the storage unit 31, while an operation changeover switch unit 35 is provided on the output side of the storage unit 31.
Here, when performing the current measurement operation, the resonance frequency calculation control unit 30 sends a measurement signal from the control unit 37 to the operation changeover switch units 34 and 35 and the storage unit 31, thereby causing the operation changeover switch unit 34 to become conductive. In this state, the operation changeover switch unit 35 is cut off, and the storage unit 31 is in a storage operation state in which current value measurement data is input and stored.

In addition, when performing the activation operation, the resonance frequency calculation control unit 30 sends an activation signal from the control unit 37 to the operation changeover switch units 34 and 35 and the storage unit 31, and thereby the operation changeover switch unit 34 is cut off. In this state, the operation changeover switch unit 35 is turned on, and the storage unit 31 is in a data output operation state in which the current value measurement data is output to the maximum frequency calculation unit 40.
The frequency increase rate variation range setting unit 32 stores the increase rate and variation range input by the factory staff at the time of factory shipment as default values, and is necessary for activating the lead storage battery 2 with the charging device 1. Accordingly, the default rate of increase and the value of the fluctuation range can be changed by a predetermined operation by the user. Then, the frequency increase rate variation range setting unit 32 stores, as necessary, a stored default increase rate and variation range, or a change instruction signal indicating the changed increase rate and variation range when there is a change. Is output.

The frequency designation signal generation unit 33 is a rise rate and fluctuation range indicated by the change instruction signal sent from the frequency rise rate fluctuation range setting unit 32, or a maximum indicated by the resonance frequency signal sent from the maximum frequency calculation unit 40. Based on the frequency, the magnitude of the voltage of the frequency designation signal to be output is set.
That is, an operation changeover switch unit 36 is provided on the input side of the frequency designation signal generator 33. When the frequency designation signal generator 33 receives a measurement signal from the control unit 37 when the frequency designation signal generator 33 performs a current measurement operation, the operation changeover switch unit 36 inputs the frequency designation signal generator 33 to the frequency increase rate variation range setting unit 32 side. To connect to.

As a result, when the current measurement operation is started, the frequency designation signal generator 33 changes the voltage of the frequency designation signal based on the increase rate and the variation range indicated by the change instruction signal from the frequency increase rate variation range setting unit 32. Specifically, from the voltage value corresponding to the lowest frequency in the fluctuation range to the voltage value corresponding to the highest frequency, the magnitude of the voltage of the frequency designation signal to be output is increased at the pitch indicated by the increase rate. It is going to be.
When the frequency selection signal generation unit 33 performs a current measurement operation, the operation changeover switch unit 36 receives the measurement signal from the control unit 37, and inputs the frequency specification signal generation unit 33 to the frequency increase rate variation range setting unit 32 side. It comes to connect.

On the other hand, when the activation operation is started, the frequency designation signal generation unit 33 sets the voltage of the frequency designation signal based on the maximum frequency indicated by the resonance frequency signal sent from the maximum frequency calculation unit 40, and the maximum frequency A frequency designation signal having a voltage value corresponding to the resonance frequency obtained by the arithmetic unit 40 is output, and the output voltage value of the frequency designation signal is maintained at a value corresponding to the resonance frequency until the activation operation ends. It has become.
The maximum frequency calculation unit 40 has a function of removing the above-described noise in addition to a function of obtaining the resonance frequency of the lead storage battery 2.
This maximum frequency calculation unit 40 detects a maximum current value and its frequency from the current value measurement data stored in the storage unit 31, and detects a minimum current value and its frequency from the current value measurement data. A minimum detection unit 42, a fluctuation range detection unit 43 that detects a fluctuation range of the maximum current value detected by the maximum detection unit 41, a noise cancellation unit 44 that removes noise that is obtained from the obtained maximum current value, and A maximum frequency holding unit 45 that holds a maximum frequency that is the frequency of the obtained maximum current value, and a maximum frequency selection unit 46 that selects an optimum one from a plurality of obtained maximum frequencies are provided.

The local maximum detection unit 41 receives the current value measurement data stored in the storage unit 31, the current value obtained by measurement at one frequency, and the state before the frequency is increased by one pitch before this measurement. The current values obtained from the measurements made in step 1 and the current value obtained in the former measurement are subtracted from the current value obtained in the latter measurement. The maximum frequency that is the frequency of the current is detected.
More specifically, the local maximum detection unit 41 performs an operation of subtracting the current value obtained by the measurement at the previous frequency from the current value obtained by the measurement at one frequency, and the difference as a result of the operation is “ The current value and frequency that are “0” or a negative value are detected, and a local maximum data signal indicating the detected current value and frequency is output.

Here, the local maximum detection unit 41 is based on the current value measurement data stored in the storage unit 31 that is a storage unit, and the maximum current value is a maximum between the preset minimum frequency and the maximum frequency. This is a maximum frequency detection means for detecting the frequency.
The minimum detection unit 42 receives the current value measurement data stored in the storage unit 31, the current value obtained by measurement at one frequency, and the state before the frequency increases by one pitch before this measurement The current values obtained from the measurements made in step 1 and the current value obtained in the former measurement are subtracted from the current value obtained in the latter measurement. The minimum frequency, which is the frequency of, is detected.

More specifically, the minimum detection unit 42 performs an operation of subtracting the current value obtained by the measurement at the previous frequency from the current value obtained by the measurement at one frequency, and the difference as a result of the operation is “ A current value and frequency that is “0” or a positive value are detected, and a minimal data signal indicating the detected current value and frequency is output.
The fluctuation width detector 43 detects the fluctuation width of the current at the maximum frequency based on the local maximum data signal output from the local maximum detector 41 and the local minimum data signal output from the local minimum detector 42.
Specifically, when the fluctuation range detection unit 43 receives the local maximum data signal from the local maximum detection unit 41, the fluctuation range detection unit 43 first receives the local maximum data from the local maximum value indicated by the local maximum data signal and then receives the local maximum data from the local minimum detection unit 42. The current fluctuation width at the maximum frequency is calculated by subtracting the minimum current value indicated by the received minimum data signal.

Further, when the fluctuation width detector 43 calculates the fluctuation width of the current at the maximum frequency, the fluctuation width detector 43 sends a maximum frequency data signal including the fluctuation width to the noise cancellation section 44. Here, the maximum frequency data signal is a maximum current value that is a current value indicated by the maximum data signal output from the maximum detection unit 41, a maximum frequency that is a frequency indicated by the maximum data signal, and a fluctuation range detection unit. The fluctuation range calculated by 43 is included.
The noise cancellation unit 44 sends out the maximum frequency data signal whose variation range is equal to or greater than a predetermined value from the maximum frequency data signal sent from the variation range detection unit 43 to the maximum frequency holding unit 45. The maximum frequency data signal whose fluctuation width is less than a predetermined size is canceled, in other words, discarded.

Here, if the vertical fluctuation range of the measured current value does not exceed a predetermined range, the noise canceling unit 44 detects this even if a current value that is a maximum in the vertical fluctuation is detected. The noise canceling unit cancels the frequency at the maximum current value as noise.
The maximum circumference 0052 wave number holding unit 45 holds the maximum frequency data signal sent from the noise canceling unit 44 until the maximum frequency selection unit 46 determines the maximum frequency to be obtained after the measurement is started. is there. The maximum frequency holding unit 45 has a capability of holding a plurality of maximum frequency data signals.

The maximum frequency selection unit 46 receives a plurality of maximum frequency data signals held by the maximum frequency holding unit 45, extracts a maximum frequency data signal having the largest fluctuation width among these, and extracts the extracted maximum frequency data signal Is a maximum frequency selection means for selecting the maximum frequency included in the resonance frequency to be obtained. The maximum frequency selection unit 46 is configured to oscillate a resonance frequency signal including the selected resonance frequency toward the frequency designation signal generation unit 33 when the resonance frequency (maximum frequency) is selected.
Here, the local maximum frequency calculating unit 40 includes the local maximum frequency selecting unit 46, thereby measuring the value of the current flowing through the lead storage battery 2 over the entire frequency range from the lowest frequency to the highest frequency set in advance. When the maximum frequency at which the current value is maximized is detected and multiple maximum frequencies at which the current value is maximized are detected, the fluctuation is a difference from the top to the bottom of the current value that changes in a mountain shape near the maximum value The frequency with the largest width is adopted as the maximum frequency.

If the charging function is removed from the charging device 1 in the above embodiment and the activation pulse voltage generator 11 is omitted, an activation pulse voltage that breaks the lead sulfate crystal film, which is a nonconductive crystal film, is used as the lead storage battery 2. In the application, the activation pulse frequency measuring device of the lead storage battery 2 that performs the measurement for obtaining the frequency of the activation pulse voltage to be applied is formed.
In the present embodiment as described above, when the resonance frequency of the lead storage battery 2 is measured, the measurement pulse voltage applied to the lead storage battery 2 is from a preset minimum frequency fmin as shown in FIG. The frequency is changed over the entire range up to the maximum frequency fmax.
In the case of the lead storage battery 2, the minimum frequency fmin can be set to 1 kHz, the maximum frequency fmax can be set to 14 kHz, and the frequency measurement range fr is about 13 kHz.

The rate of increase when the frequency of the measurement pulse voltage is increased, in other words, the pitch fp when changing the frequency is 5 to 10% of the frequency measurement range fr. Can be set to 100Hz.
On the other hand, when measuring the current of the lead storage battery 2, the current measurement range Ir, which is the current measurement range, differs significantly depending on the capacity of the lead storage battery 2, so explanations for all cases cannot be given, but for ordinary passenger cars, etc. In the case of the lead storage battery used, the minimum current value Imin can be set to about 1 mA, the maximum current value Imax can be set to about 100 mA, and the current measurement range Ir can be set to about 100 mA.

When the measurement is performed in such a setting, when the frequency of the measurement pulse voltage becomes the resonance frequency of the lead storage battery 2, the current value greatly changes in a mountain shape. In other words, as shown in FIG. In FIG. 4, the peak of the mountain portion A is a point indicating the maximum current value at which the current is maximum and the maximum frequency that is the frequency.
Here, the fluctuation range ΔI of the current value in the chevron portion A is a value that falls within the range of 10% to 30% of the current measurement range Ir, and the fluctuation range of the noise current value is 5% or less of the current measurement range Ir. Therefore, noise can be easily and reliably removed.
Further, since the frequency width Δf in the chevron portion A falls within the range of 5% to 10% of the frequency measurement range fr, the maximum current value can be reliably obtained by setting the pitch fp to 100 Hz. be able to.

Next, the operation of the charging device 1 according to this embodiment will be described with reference to the flowchart of FIG.
After connecting the lead storage battery 2 to the charging device 1, the operation of the charging device 1 is started by turning on the power of the charging device 1. Then, as shown in FIG. 5, in the first step S1000, the frequency of the measurement pulse voltage is changed by a predetermined pitch over the entire range from the preset minimum frequency fmin to the maximum frequency fmax. A measurement pulse voltage application process for applying a voltage to the lead storage battery 2, a current measurement process for measuring a current flowing through the lead storage battery 2 every time the frequency of the measurement pulse voltage is changed by a predetermined pitch, and a measured current value Are sequentially input to the storage unit 31, and measurement value storage processing is started in which current value measurement data including the input current value and the frequency at the time of measurement is formed inside the storage unit 31. The

In the next step S1100, it is determined whether or not the current measurement is completed for the entire range from the lowest frequency fmin to the highest frequency fmax. More specifically, in step S1100, the current measurement process for measuring the current flowing in the lead storage battery 2 while changing the frequency of the measurement pulse voltage applied to the lead storage battery 2 by a predetermined pitch is performed from the minimum frequency fmin to the maximum frequency fmax. A determination is made as to whether or not the entire range has been completed.
If it is not determined in step S1100 that the current measurement is completed, step S1100 is repeated until the current measurement is completed. On the other hand, if it is determined in step S1100 that the current measurement is completed, the process proceeds to the next step S1200.

In step S1200, by detecting the change in the current value for the entire range from the minimum frequency fmin to the maximum frequency fmax, the maximum and minimum that detect the maximum portion where the measured current becomes the maximum and the minimum portion that becomes the minimum are detected. Based on the detection processing and the maximum and minimum parts of the detected current value, the fluctuation range of the maximum part is calculated, and if the fluctuation range of the maximum part does not reach the reference value, the maximum part is detected as noise. Noise cancel processing for canceling as a local maximum is performed.
When these maximum / minimum detection processing and noise canceling processing are completed, the process proceeds to the next step S1300, and in step S1300, the maximum frequency remaining after the noise cancellation processing and the maximum frequency data including the fluctuation range are held. When the holding of the maximum frequency data is completed, the process proceeds to the next step S1300.

In step S1400, it is determined whether or not a plurality of maximum frequency data is held in step S1300. If it is not determined in step S1400 that a plurality of local maximum frequency data has been retained, in other words, if it is determined that there is only one local maximum frequency data, the local maximum frequency data is determined as the resonance frequency. Is held as including the maximum frequency, and the next step S1500 is skipped and the process proceeds to step S1600.
On the other hand, if it is determined in step S1400 that a plurality of maximum frequency data has been held, the process proceeds to the next step S1500.
In step S1500, it is assumed that the maximum frequency selection processing for selecting the maximum frequency data having the largest fluctuation range among the plurality of stored maximum frequency data, and the selected maximum frequency data includes the maximum frequency that becomes the resonance frequency. The resonance frequency holding process for holding the selected maximum frequency data is performed.

  In step S1600, an activation pulse voltage application process for applying an activation pulse voltage to the lead storage battery 2 is performed while a charge process for charging the lead storage battery 2 is performed. That is, in step S1600, an activation pulse voltage generator at the maximum frequency as the resonance frequency included in the maximum frequency data held in step S1400 or step S1500 in a state where a DC voltage for charging is applied to the lead storage battery 2 11 is oscillated, and the activation pulse voltage of this maximum frequency is applied to the lead storage battery 2, whereby the activation pulse voltage application process and the charging process are simultaneously performed. Then, after the charging process is started, the activation pulse voltage application process and the charging process are completed when a predetermined time that is considered necessary for the lead storage battery 2 to accumulate sufficient power has elapsed. Since the activation pulse voltage application process is performed over the time required for the charging process, the lead sulfate crystal film adhering to the electrode can be sufficiently destroyed and the activation can be performed reliably. Thus, the operation of the charging device 1 is completed.

Such a charging device 1 is desirably used for the lead storage battery 2 immediately after manufacturing the lead storage battery 2 as a secondary battery or immediately after purchase.
When the charging device 1 is used for the storage battery 2, conductive lead particles or conductive molecules, such as carbon black or ionic liquid, which promote the destruction of the lead sulfate crystal coating are previously stored in the lead storage battery 2. It is preferable to be mixed in the electrolyte solution.
The charging device 1 can also be used when the lead storage battery 2 is received by electric power generated by a generator such as an automobile. And when the output voltage of generators, such as a motor vehicle, and the charging voltage of the lead storage battery 2 match, the pressure | voltage fall part 3 can be abbreviate | omitted. Furthermore, as generators for automobiles, etc., generators with excellent linearity are employed in which the output voltage and frequency do not fluctuate greatly even if the rotational speed of the rotational driving force that drives the input shaft of the generator changes. Is preferred.

Further, the charging device 1 can automatically detect the maximum frequency by the maximum detection unit 41 while charging the lead storage battery 2, and can be detected by the activation pulse voltage generation unit 11 while charging the lead storage battery 2. An activation pulse voltage can be applied to the lead storage battery 2. Thereby, regardless of whether the lead storage battery 2 is in the charged state or the discharged state, both automatic detection of the maximum frequency and application of the activation pulse voltage can be performed. Automatic detection of the maximum frequency and application of the activation pulse voltage can be alternately repeated.
For this reason, automatic detection of the maximum frequency is performed for a lead storage battery 2 used in a situation where charging and discharging are performed as needed, and sometimes charging and discharging are performed simultaneously, for example, a lead storage battery 2 mounted in an automobile. If the application of the activation pulse voltage is alternately repeated at a predetermined cycle, either charging or discharging is always performed, the internal state of the lead storage battery 2 changes, and the resonance frequency of the lead storage battery 2 also changes. Even if it does, automatic detection of the maximum frequency is performed for every predetermined period, and the frequency of the activation pulse voltage can be updated according to the result of this automatic detection to follow the change in the resonance frequency of the lead storage battery 2. it can. Thereby, destruction of a nonelectroconductive crystal | crystallization film | membrane can be performed more efficiently and the efficiency of activation of the lead storage battery 2 can be improved further.

According to this embodiment as described above, the following effects can be obtained.
That is, since the measurement pulse voltage generator 12 is provided as a voltage applying means capable of changing the oscillation frequency of the measurement pulse voltage applied to the lead storage battery 2, the measurement pulse voltage generator 12 allows the resonance frequency of the lead storage battery 2 to be changed. A measurement pulse voltage, which is a predetermined voltage, can be applied to the lead-acid battery 2 while changing the frequency from the lowest frequency fmin to the highest frequency fmax in the existing range.
In addition, since the measurement pulse voltage generator 12 applies the measurement pulse voltage to the lead storage battery 2, the current measurement section 23 is provided for measuring the current value flowing through the lead storage battery 2, so that the minimum frequency fmin to the maximum frequency fmax are provided. While applying the measurement pulse voltage to the lead storage battery 2 while changing the frequency over the entire range up to, the current flowing through the lead storage battery 2 at each frequency can be measured.

Furthermore, since the maximum detection unit 41 for detecting the maximum frequency where the current value becomes maximum between the minimum frequency fmin and the maximum frequency fmax is provided, the current value increases to a sharp mountain shape and becomes a maximum. The frequency can be detected automatically.
Here, since the maximum frequency obtained by the operation of the measurement pulse voltage generation unit 12, the current measurement unit 23, and the maximum detection unit 41 becomes the resonance frequency of the lead storage battery 2, the degree of deterioration in the lead storage battery, in other words, Since the surface of the electrode varies depending on the degree of covering with the lead sulfate crystal film, the resonance frequency of the lead storage battery 2 can be obtained reliably and accurately by measurement even if the value is unknown before measurement.

Since the activation pulse voltage generator 11 for applying the activation pulse voltage at the maximum frequency detected by the maximum detection unit 41 to the lead storage battery 2 is provided, the activation pulse voltage at the resonance frequency is automatically applied to the lead storage battery 2. As a result, the lead sulfate crystal film, which is a non-conductive crystal film, can be efficiently removed. Therefore, the activation of the lead storage battery 2 is ensured regardless of the degree of deterioration of the lead storage battery 2. In addition, the lead storage battery 2 can be automatically activated.
In addition, when the vertical fluctuation range of the measured current value does not exceed a predetermined range, the detected maximum current value is detected even if the maximum current value is detected in the vertical fluctuation. There is a noise canceling means that cancels the frequency in the noise as noise, and when measuring the value of the current flowing in the secondary battery, the current to be measured includes pulsations that fluctuate up and down, so there are many local maxima Even if a part is generated as noise, the noise canceling means cancels the frequency at the local maximum for many local maximums that cause noise, and the resonance frequency to be measured is automatically selected from the multiple noise frequencies. Thus, the resonance frequency to be obtained can be reliably and accurately measured.

  Furthermore, since a plurality of electrode plates are provided, and the degree of film formation of sulfate crystals is different for each electrode plate, measurement was performed on the lead storage battery 2 in which a plurality of numerical resonance frequencies may exist. As a result, even if the local maximum detecting unit 41 detects a plurality of numerical resonance frequencies, a local maximum frequency selecting unit 46 that automatically selects the local maximum frequency having the largest fluctuation range as the resonant frequency is provided. Since the activation pulse voltage of the selected frequency is applied to the lead storage battery 2, the largest current among the activation pulse voltages of the resonance frequency obtained in this measurement can be conducted to the lead storage battery 2, thereby The lead sulfate crystal coating can be efficiently removed, and therefore the lead storage battery 2 can be activated reliably and sufficiently.

  Further, an activation pulse voltage generation unit 11 for applying an activation pulse voltage at the maximum frequency detected by the maximum detection unit 41 to the lead storage battery 2 is provided, and a rectification unit 4 for charging the lead storage battery 2 has a predetermined value in the lead storage battery 2. Since the activation pulse voltage of the activation pulse voltage generation unit 11 is superimposed on the DC voltage of the rectification unit 4 and applied to the lead storage battery 2 while the DC voltage is applied, the lead storage battery 2 is charged. However, the lead storage battery 2 can be activated and a pulse current having a larger current value can be passed through the lead storage battery 2 by applying the activation pulse voltage than when the activation pulse voltage is applied alone. it can. As a result, the pulse current for breaking the lead sulfate crystal film which is a non-conductive crystal film can be made stronger, the lead sulfate crystal film can be broken more effectively, and the lead storage battery 2 can be activated. Efficiency can be further improved.

In addition, an uninterruptible power supply is configured including the charging device 1 and the lead storage battery 2 according to the present invention, and the non-conductive crystal coating is destroyed in a state where a precision instrument such as a personal computer is connected to the uninterruptible power supply. Therefore, even if a pulse current having a large instantaneous maximum value is supplied to the lead storage battery 2, the lead storage battery 2 serves as a buffer, so that no adverse effect is exerted on precision instruments such as personal computers.
In addition, each time the charging process is performed, the resonance frequency of the lead storage battery 2 is measured, and the lead storage battery 2 is activated by the activation pulse voltage output at the resonance frequency obtained by this measurement. The lead storage battery 2 can be activated efficiently even when the progress speed at which the lead storage battery 2 deteriorates differs depending on the environment used, for example, the ambient temperature, and the degree of deterioration is unknown.

Specifically, there is an individual difference in the speed of progress of deterioration of the lead storage battery 2, and the area increase speed of the lead sulfate crystal film covering the electrode of the lead storage battery 2 and the speed of increase in the thickness of the lead sulfate crystal film Even if the progress speed of the deterioration of the lead storage battery 2 is unknown, the resonance frequency of the lead storage battery 2 is measured every time the charging process is performed, so that the deterioration degree of the lead storage battery 2 that changes every day is followed. Therefore, the lead storage battery 2 can always be activated efficiently.
In addition, in order to actively use nighttime electricity at factories and homes, the nighttime electricity is used to charge the lead storage battery 2 with the charging device 1 at nighttime, and the electricity charged at nighttime is led in the daytime. If taken out from the storage battery 2 and used, the peak power during the daytime can be suppressed, thereby improving the power demand. In addition, since the lead storage battery 2 is activated by the charging device 1 every day, it is possible to prevent a lead sulfate battery crystal film from being formed on the electrode of the lead storage battery 2, and to significantly extend the life of the lead storage battery 2. Waste can be reduced and resources can be recycled smoothly.

Further, the coupling transformer 5 is provided in the charging device 1, the maximum frequency can be automatically detected by the maximum detection unit 41 while charging the lead storage battery 2, and the activation pulse is charged while charging the lead storage battery 2. Since the activation pulse voltage can be applied to the lead storage battery 2 by the voltage generator 11, automatic detection of the maximum frequency and the activation pulse voltage regardless of whether the lead storage battery 2 is in the charged state or the discharged state. Any one of the above can be executed, and automatic detection of the maximum frequency and application of the activation pulse voltage can be alternately repeated on the lead storage battery 2 at a predetermined cycle.

For this reason, automatic detection of the maximum frequency is performed for a lead storage battery 2 used in a situation where charging and discharging are performed as needed, and sometimes charging and discharging are performed simultaneously, for example, a lead storage battery 2 mounted in an automobile. The application of the activation pulse voltage can be alternately repeated at a predetermined cycle.
As a result, either charging or discharging is always performed, and even if the internal state of the lead storage battery 2 changes and the resonance frequency of the lead storage battery 2 also changes, automatic detection of the maximum frequency is performed every predetermined period. As a result of this automatic detection, the frequency of the activation pulse voltage can be updated to follow the change in the resonance frequency of the lead storage battery 2, thereby more efficiently destroying the nonconductive crystal coating. The activation efficiency of the lead storage battery 2 can be further improved.

In addition, this invention is not limited to the said embodiment, The deformation | transformation in the range which can achieve the objective of this invention, improvement, etc. are included.
That is, the secondary battery is not limited to a lead-acid battery, but may be another type of secondary battery such as a nickel cadmium battery or a nickel metal hydride battery. The present invention is a general secondary battery that deteriorates due to an increase in internal resistance. The activation can be realized.

It is a block diagram which shows schematic structure of the charging device which concerns on one Embodiment of this invention. It is a block diagram which shows schematic structure of the activation apparatus which concerns on the said embodiment. It is a block diagram which shows schematic structure of the resonant frequency measurement control part which concerns on the said embodiment. It is a graph which shows the relationship between the frequency and electric current in the measurement which concerns on the said embodiment. It is a flowchart for demonstrating the operation | movement procedure of the charging device which concerns on the said embodiment.

Explanation of symbols

2 Lead-acid battery as secondary battery 4 Current part as DC voltage application means
10 Activation unit as an activation device
11 Activation pulse voltage generator as activation pulse voltage generator
12 Measurement pulse voltage generator as voltage application means
23 Current measurement unit as a current measurement means
31 Storage unit as storage means
41 Maximum detection unit as maximum frequency detection means
44 Noise canceling part as noise canceling means
46 Maximum Frequency Selection Unit as Maximum Frequency Selection Means

Claims (9)

A method for activating a secondary battery in which an activation pulse voltage for activating the secondary battery is applied to the secondary battery,
While applying a predetermined voltage to the secondary battery while changing the frequency over the entire range from the lowest frequency to the highest frequency set in advance, the current value flowing through the secondary battery is measured, and the current value is After finding the local maximum frequency,
A method for activating a secondary battery, comprising applying an activation pulse voltage having the maximum frequency obtained to the secondary battery.   When measuring the current value flowing through the secondary battery over the entire frequency range from the lowest frequency to the highest frequency set in advance, the vertical fluctuation range of the measured current value is a predetermined range set in advance. If it does not exceed, even if the current value becomes the maximum in the vertical fluctuation, the frequency at which the current value becomes maximum is ignored, and the current value is increased when the vertical fluctuation width exceeds a predetermined range. The method for activating a secondary battery according to claim 1, wherein a frequency that is a maximum is adopted as a maximum frequency.   The current value flowing through the secondary battery is measured over the entire frequency range from the lowest frequency to the highest frequency set in advance, the maximum frequency at which the current value becomes maximum is obtained, and the maximum frequency at which the current value becomes maximum is determined. When multiple measurements are taken, use the maximum frequency with the largest difference from the top to the bottom of the current value that changes in a mountain shape near the maximum value, and apply the activation pulse voltage of this maximum frequency to the secondary battery. The method for activating a secondary battery according to claim 1 or 2.   4. The secondary battery according to claim 1, wherein charging of the secondary battery is started immediately after the activation pulse voltage having the maximum frequency obtained is applied to the secondary battery. Activation method. An activation device for a secondary battery that applies an activation pulse voltage for activating a deteriorated secondary battery to the secondary battery,
Voltage application means for applying a predetermined measurement voltage to the secondary battery while changing the frequency over the entire range from the lowest frequency to the highest frequency set in advance;
Current measuring means for measuring a current value flowing in the secondary battery when the voltage applying means applies a measurement voltage; and
Current value measurement data indicating a change in current value with respect to a change in frequency is stored in addition to the current value measured by the current measurement means over the entire frequency range from the lowest frequency to the highest frequency set in advance. Storage means;
Based on the current value measurement data stored in the storage means, a maximum frequency detection means for detecting a maximum frequency at which the current value is maximum between a preset minimum frequency and a maximum frequency;
An activation device for a secondary battery, comprising activation pulse voltage generation means for applying an activation pulse voltage at the maximum frequency detected by the maximum frequency detection means to the secondary battery. When measuring the current value flowing through the secondary battery over the entire frequency range from the lowest frequency to the highest frequency set in advance, the vertical fluctuation range of the measured current value is a predetermined range set in advance. If it does not exceed, even if a current value that is a maximum in the vertical fluctuation is detected, a noise canceling means is provided to cancel the frequency at the detected current value as a noise,
The maximum frequency detecting means adopts a frequency that is not canceled by the noise canceling operation of the noise canceling means as the maximum frequency because the vertical fluctuation range exceeds a predetermined range set in advance. 6. The activation apparatus for a secondary battery according to claim 5, characterized in that: Measures the current value flowing through the secondary battery over the entire frequency range from the lowest frequency to the highest frequency set in advance, detects the maximum frequency at which the current value is maximum, and determines the maximum frequency at which the current value is maximum Is detected, a maximum frequency selection means is provided for selecting the maximum frequency for the frequency with the largest difference from the top to the bottom of the current value that changes in a mountain shape in the vicinity of the maximum value,
The activation of the secondary battery according to claim 5 or 6, wherein the activation pulse voltage generating means applies the activation pulse voltage of the maximum frequency selected by the maximum frequency selection means to the secondary battery. Device. When an activation pulse voltage for activating a deteriorated secondary battery is applied to the secondary battery at a predetermined frequency, measurement is performed to determine the frequency of the activation pulse voltage to be applied to the secondary battery. A device for measuring the activation pulse frequency of a secondary battery,
Voltage application means for applying a predetermined measurement voltage to the secondary battery while changing the frequency over the entire range from the lowest frequency to the highest frequency set in advance;
Current measuring means for measuring a current value flowing in the secondary battery when the voltage applying means applies a measurement voltage; and
Current value measurement data indicating a change in current value with respect to a change in frequency is stored in addition to the current value measured by the current measurement means over the entire frequency range from the lowest frequency to the highest frequency set in advance. Storage means;
Based on the current value measurement data stored in the storage means, a maximum frequency detection means for detecting a maximum frequency at which the current value becomes a maximum between a preset minimum frequency and a maximum frequency is provided. A device for measuring the activation pulse frequency of a secondary battery. A charging device for a secondary battery having a function of applying an activation pulse voltage for activating a deteriorated secondary battery to the secondary battery,
In order to conduct a charging current for charging to the secondary battery, a predetermined DC voltage is applied to the secondary battery;
Voltage application means for applying a predetermined measurement voltage to the secondary battery while changing the frequency over the entire range from the lowest frequency to the highest frequency set in advance;
Current measuring means for measuring a current value flowing in the secondary battery when the voltage applying means applies a measurement voltage; and
Current value measurement data indicating a change in current value with respect to a change in frequency is stored in addition to the current value measured by the current measurement means over the entire frequency range from the lowest frequency to the highest frequency set in advance. Storage means;
Based on the current value measurement data stored in the storage means, a maximum frequency detection means for detecting a maximum frequency at which the current value is maximum between a preset minimum frequency and a maximum frequency;
An activation pulse voltage generating means for applying an activation pulse voltage of the maximum frequency detected by the maximum frequency detection means to the secondary battery,
In a state where the DC voltage applying means is applying a predetermined DC voltage to the secondary battery, the activation pulse voltage generating means superimposes the activation pulse voltage on the DC voltage of the DC voltage applying means. A charging device for a secondary battery, wherein the charging device is configured to be applied to a secondary battery.

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