JP2017091738A - Lead acid battery regenerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prolong the life of a lead acid battery by removing sulfation adhering to the electrode surface of the lead acid battery.SOLUTION: A lead acid battery regenerator 100 for removing sulfation adhering to the electrode 12 of a lead acid battery 10 includes a discharge pulse current supply section 102 for supplying a discharge pulse current Ip to the electrode, and a control section 104 for controlling the discharge pulse current supply section so as to generate a pulse power of a predetermined magnitude or more only at charging, corresponding to the battery capacity of the lead acid battery, by detecting the charging time thereof, and to supply the pulse power to the electrode.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lead-acid battery regenerator that removes a lead sulfate non-conductive film attached to an electrode of a lead-acid battery and extends the life of the lead-acid battery.

Among secondary batteries that can be repeatedly charged and discharged, lead-acid batteries are relatively inexpensive and have stable performance. Therefore, they are used for automobiles, ships, construction machinery, industrial power supplies, and residential power supplies. It is widely used as an emergency power source when it stops. However, a lead-acid battery has a non-conductive film of lead sulfate (PbSO ₄ ) crystallized on the negative electrode surface by repeating the charging and discharging of the lead-acid battery, and the sulfuric acid in the electrolyte and the lead on the electrode plate are chemically reacted on the negative electrode surface. It becomes attached to the electrode plate and deteriorates (sulfation).

  The non-conductive film formed by sulfation grows on the electrode surface and is white-cured, thereby reducing the effective electrode surface area. The non-conductive coating increases the internal resistance of the lead-acid battery and greatly reduces the charge capacity, thus significantly reducing battery performance. In order to remove such a non-conductive film of lead sulfate, a pulsating current is applied to the electrode of the lead-acid battery, and an electric shock is applied between the electrode and the lead sulfate film grown on the surface, so that sulfation is physically removed from the electrode. Patent Document 1 and Patent Document 2 disclose a method for automatically peeling.

Japanese Patent No. 3902212 JP 2011-71001 A

  Sulfation is a phenomenon in which lead sulfate produced by the discharge of a lead storage battery is deposited on the negative electrode plate and gradually grows to form a white-cured non-conductive film. The discharge conditions and surroundings when the lead storage battery is left unattended It is affected by various conditions such as temperature and vibration. For this reason, depending on the conditions, the lead-acid battery may not be regenerated even when a pulse current is applied. The reproduction methods disclosed in Patent Document 1 and Patent Document 2 apply a weak pulse current of about 0.01 to 0.10 A to the electrode in consideration of the adverse effect of the heat generation of the electrode due to the application of the pulse current. doing. For this reason, when the degree of sulfation is light, the lead storage battery can be regenerated, but depending on the degree of sulfation, the lead storage battery may not be regenerated.

  The present invention has been made in view of the above problems, and more reliably removes sulfation adhering to the electrode of the lead storage battery while reducing the adverse effects due to the heat generation of the electrode due to the application of the pulse current. It is an object of the present invention to provide a new and improved lead-acid battery regeneration device capable of extending the life.

  One aspect of the present invention is a lead-acid battery regeneration device that removes sulfation adhering to an electrode of a lead-acid battery, the discharge-pulse current supply unit supplying a discharge pulse current to the electrode, and detecting the charge of the lead-acid battery Then, the discharge pulse current supply unit is controlled so as to generate a pulse power of a predetermined magnitude or more corresponding to the battery capacity of the lead storage battery only at the time of charging and supply the pulse power to the electrode. A control unit is provided.

  According to one aspect of the present invention, the sulfation formed on the electrode surface is applied by applying a discharge pulse current that generates a pulse power of a predetermined magnitude or more from the discharge pulse current supply unit to the electrode when the lead storage battery is charged. It can be reliably destroyed by the lead ion current impact from the inside of the electrode.

  At this time, according to an aspect of the present invention, the control unit adjusts a current value, a pulse width, and a pulse period of the discharge pulse current to obtain the pulse power having a predetermined magnitude or more corresponding to the battery capacity. The discharge pulse current supply unit may be controlled so as to be generated.

  By applying a discharge pulse current to the electrode under such conditions, the sulfation formed on the electrode surface can be more reliably destroyed from the inside of the electrode.

  Moreover, in one aspect of the present invention, the control unit has a power value that is equal to or greater than a power value calculated by multiplying a 1 C discharge current with respect to the battery capacity and a rated voltage of the lead storage battery as a reference for the pulse power supplied to the electrode. The discharge pulse current supply unit may be controlled so as to generate a pulse power having a magnitude. Here, 1 C is a current value [ampere] at which discharge of the rated capacity ampere hour of the battery is completed in one hour.

  In this way, the discharge pulse current that generates the pulse power corresponding to the size of the battery capacity is discharged from the electrode, thereby reducing the adverse effects caused by the heat generation of the electrode due to excessive current application, and formed on the electrode surface. Sulfation can be destroyed more reliably from the inside of the electrode.

  As described above, according to the present invention, a discharge pulse current that generates pulse power corresponding to the size of the battery capacity is applied to the electrode during charging, and pulse discharge is not performed during battery discharge, thus preventing overdischarge. However, the sulfation adhering to the electrode surface of the lead storage battery is more reliably removed. For this reason, the practicality from the viewpoint of battery protection is high, and the life of the lead storage battery can be increased efficiently and reliably.

It is a block diagram which shows schematic structure of the lead acid battery reproducing | regenerating apparatus which concerns on one Embodiment of this invention. It is a pulse waveform diagram of the discharge pulse current applied from the lead acid battery regeneration device concerning one embodiment of the present invention. It is explanatory drawing which shows the relationship between the battery voltage and elapsed time in the performance evaluation test of the lead acid battery reproducing | regenerating apparatus which concerns on one Embodiment of this invention, and the timing which applies a discharge pulse current from the said lead acid battery reproducing | regenerating apparatus. It is a block diagram which shows the embodiment with which the lead storage battery reproducing | regenerating apparatus which concerns on one Embodiment of this invention applies a discharge pulse current. (A) thru | or (c) are operation | movement explanatory drawings of the sulfation removal by the lead acid battery reproducing | regenerating apparatus which concerns on one Embodiment of this invention. It is a graph which shows the relationship between the charging / discharging cycle number in the evaluation experiment of the lead acid battery reproducing | regenerating apparatus which concerns on one Embodiment of this invention, and the discharge completion voltage for every cycle.

  Hereinafter, preferred embodiments of the present invention will be described in detail. The present embodiment described below does not unduly limit the contents of the present invention described in the claims, and all the configurations described in the present embodiment are essential as means for solving the present invention. Not necessarily.

  First, a schematic configuration of a lead-acid battery regeneration device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a lead-acid battery regeneration device according to an embodiment of the present invention.

  Lead storage battery regeneration device 100 according to an embodiment of the present invention is a lead sulfate layer attached to the surface of electrode 12 (12a, 12b) by flowing a discharge pulse current toward electrode 12 of lead storage battery 10. This is a device for removing the sulfation and extending the life of the lead storage battery 10. As shown in FIG. 1, the lead-acid battery regeneration device 100 of the present embodiment includes a discharge pulse current supply unit 102 that supplies a pulse current to the electrode 12, and a discharge pulse current Ip that is supplied from the discharge pulse current supply unit 102. A control unit 104 that controls the pulse waveform, current value, timing, and the like is provided.

  For example, the discharge pulse current supply unit 102 supplies a discharge pulse current having a pulse waveform as shown in FIG. The discharge pulse current supply unit 102 includes, for example, an oscillator (not shown) and a discharge pulse current generator, and an electronic switch such as a MOSFET or IGBT provided in the discharge pulse current generator or an electromagnetic wave is generated by a signal wave output from the oscillator. As shown in FIG. 2, the relay is driven to generate a discharge pulse current Ip having a pulse width T1 and a pulse waveform with a pulse period T. The discharge pulse current supply unit 102 applies the discharge pulse current Ip to the electrode 12 (12a, 12b) via the connection terminal 15 (15a, 15b) of the lead storage battery 10. The discharge pulse current Ip to be applied may be a current having a predetermined cycle such that the current value fluctuates in a pulse shape every cycle T. Therefore, the waveform is not limited to the rectangular wave shown in FIG. Other waveform shapes such as a raised cosine wave, a triangular wave, and a sawtooth wave, and a plurality of isolated waveforms that are a combination thereof are also applicable. In an actual apparatus, the repetition period T of the pulse current is not necessarily fixed, and the period itself may change irregularly.

  The control unit 104 controls various components provided in the lead storage battery regeneration device 100. In the present embodiment, the control unit 104 detects when the lead storage battery 10 is charged, and adjusts a discharge pulse current Ip, a pulse width T1, a pulse interval T2, and a pulse period T, which will be described later, only during the charging. The discharge pulse current supply unit 102 is controlled so that the pulse current Ip generates a pulse power having a predetermined magnitude or more. Specifically, the control unit 104 generates pulse power of a predetermined magnitude or more corresponding to the battery capacity of the lead storage battery 10 when the lead storage battery 10 is charged, and supplies the pulse power to the electrode 12. The discharge pulse current supply unit 102 is controlled. Details of the control of the discharge pulse current supply unit 102 in the control unit 104 will be described later.

  “Pulse power” referred to in the present specification refers to a value calculated by Ip × V with respect to the discharge pulse current Ip and the rated battery voltage V, and the momentum above a certain value is added to the egg shell. In the same way that it can be destroyed, it means the power [watt] per unit time that causes the discharge power exceeding a certain threshold to be applied to the battery. In other words, the present inventor can effectively remove sulfation by a non-linear phenomenon that can never be obtained with a small pulse power as conventionally performed, and sulfation removal is not at the time of discharging the battery but at the time of charging. It has been discovered that sulfation removal is effectively achieved by generating and supplying a discharge pulse current, and the present invention has been created as a device for realizing this.

Further, “pulse width T1” referred to here refers to the time width of the discharge pulse current Ip shown in FIG. 2, and “pulse interval T2” refers to the time interval of the discharge pulse current Ip shown in FIG. That is, the sum of the pulse width T1 and the pulse interval T2 becomes the cycle T of the discharge pulse current Ip. When a somewhat complicated pulse waveform is used, the pulse generation time including the entire pulse waveform can be regarded as the pulse width T1. The “average pulse power” means power [watts] having a predetermined magnitude by the discharge pulse current Ip, and uses the discharge pulse current Ip, the pulse width T1, the pulse period T, and the rated battery voltage V. And calculated by the following equation (1). The lower limit value of the discharge pulse current Ip is a value corresponding to the battery capacity of the lead storage battery 10 to be used. Details of the control of the discharge pulse current Ip by the control unit 104 will be described later.
(Average pulse power) = V × Ip × T1 / T (1)

The lead storage battery 10 is provided with a positive electrode 12a and a negative electrode 12b opposite to each other arranged at predetermined positions as an electrode 12 in a casing 11 with a separator 14 therebetween, and the positive electrode 12a and the negative electrode 12b are sufficiently immersed. as an electrolytic solution 13 consisting primarily of dilute sulfuric acid _(H 2 sO ₄₎ is filled. The positive electrode 12a is composed of porous lead dioxide that functions as an active material at least on its surface, and the negative electrode 12b is composed of porous lead that functions as an active material on at least its surface.

The lead storage battery 10 having the above-described configuration is discharged according to the following reaction formulas (2) and (3) and charged according to the following reaction formulas (4) and (5). That is, the sulfate ions move from both the positive electrode 12a and the negative electrode 12b into the electrolytic solution 13 to be charged, and the sulfate ions in the electrolytic solution 13 move to both the positive electrode 12a and the negative electrode 12b to discharge.
(During discharge)
Positive electrode: PbO ₂ + 4H ⁺ + SO ₄ ² + + 2e ⁻
→ PbSO ₄ + 2H ₂ O (2)
Negative electrode: Pb + SO ₄ ²⁻ → PbSO ₄ + 2e ⁻ (3)
(When charging)
Positive electrode: PbSO ₄ + 2H ₂ O
→ PbO ₂ + 4H ⁺ + SO ₄ ²⁻ + 2e ⁻ (4)
Negative electrode: PbSO ₄ + 2e ⁻ → Pb + SO ₄ ²⁻ (5)

As described above, when the discharge and charge are repeated or the natural discharge state and the discharge state are continued for a predetermined period, lead sulfate (PbSO ₄ ) is crystallized on the surfaces of the positive electrode 12a and the negative electrode 12b by a chemical reaction. Sulfuration is deposited. In particular, if the sulfation deposited during the discharge of the lead storage battery 10 is left for a long period of time, the crystallized sulfation will harden and will not return to the electrolyte even if it is charged again, increasing the internal resistance of the lead storage battery 10. In addition, the battery performance is remarkably lowered by inducing a decrease in charging efficiency, a decrease in power storage capacity, and a decrease in discharge power.

  In the present embodiment, the lead storage battery regeneration device 100 applies a discharge pulse current Ip that causes the electrode 12 to have a large current of a predetermined magnitude or more during charging of the lead storage battery 10 in order to remove sulfation attached to the electrode 12. Only applied. As a result of intensive studies in order to achieve the above-described object of the present invention, the present inventor has made a discharge that generates a pulse power of a predetermined magnitude or more corresponding to the battery capacity of the lead storage battery 10 when the lead storage battery 10 is charged. It has been found that by applying the pulse current Ip to the electrode 12, sulfation can be reliably removed and the life of the lead-acid battery 10 can be extended while reducing the adverse effects caused by the heat generation of the electrode 12 due to the current application.

  In addition, the inventor can generate a current in the opposite direction to the battery charging current by flowing a strong discharge pulse current Ip only during charging in which current flows from the electrolyte 13 to the negative electrode 12b. It was found that the surface sulfation can be more effectively destroyed by ions from inside. For this reason, in this embodiment, as shown in FIG. 3, by applying the discharge pulse current Ip to the electrode 12 only during the charging period, the destruction of the sulfation attached to the surface of the electrode 12 by the ions from the inside of the negative electrode is efficiently performed. Is going.

  In the present embodiment, the control unit 104 applies overdischarge to the lead storage battery 10 by applying the discharge pulse current Ip to the lead storage battery 10 only at the time of charging based on the detection result of the charging state of the lead storage battery 10. While preventing, efficient sulfation adhesion can be prevented. As shown in FIG. 4, the lead storage battery regeneration device 100 according to the present embodiment detects the on / off state of charging of the lead storage battery 10 of the charger 18 connected to the power supply 16, and the lead storage battery of the charger 18. 10 detects that the charging state to 10 is ON, the control unit 104 causes the discharge pulse current supply unit 102 to start applying the discharge pulse current Ip to the electrode 12 of the lead storage battery 10 (see FIG. 1). Control.

  For example, when the lead storage battery regeneration device 100 of the present embodiment is applied to a lead storage battery for an automobile-mounted starter, the discharge pulse current Ip is applied only when the automobile engine serving as the load 20 is applied and charged. To do. Thereby, it is possible to prevent the lead storage battery 10 from being burdened by discharge during parking when the automobile engine is stopped. Also in other applications, by applying the discharge pulse current Ip only when charging is performed, it is possible to provide a practical device that can reliably remove sulfation while preventing overdischarge.

  Furthermore, the present inventor has found that the appropriate value of the discharge pulse current Ip applied to remove sulfation attached to the electrode 12 remarkably depends on the capacity of the lead storage battery 10. That is, the present inventor has found that the preferred value of the pulse power that exerts the effect of removing sulfation attached to the electrode 12 depends on the capacity of the lead storage battery 10. In the present embodiment, as a preferable value of the pulse power, by applying a discharge pulse current Ip that generates a pulse power corresponding to the battery capacity of the lead storage battery 10 to the lead storage battery 10, an excess current is applied. The sulfation formed on the surface of the electrode 12 is more reliably destroyed from the inside of the electrode 12 while reducing adverse effects due to the heat generation of the electrode 12.

  Further, in the present embodiment, when applying the discharge pulse current Ip to the lead storage battery 10, the control unit 104 adjusts the discharge pulse current Ip, the pulse width T1, and the pulse period T, so that the lead storage battery 10 is charged. The discharge pulse current supply unit 102 is controlled so as to generate a pulse power of a predetermined magnitude or more corresponding to the battery capacity of the lead storage battery 10. Specifically, the lead storage battery regeneration device 100 calculates the power value calculated by multiplying the 1C discharge current with respect to the battery capacity of the lead storage battery 10 by the rated voltage of the lead storage battery 12 as the pulse power supplied to the electrode 12 by the control unit 104. The discharge pulse current supply unit 102 is controlled so as to generate the discharge pulse current Ip including the above-described pulse power.

  That is, in this embodiment, when a power value obtained by multiplying the 1C discharge current for the battery capacity (Ah, ampere hour) of the lead storage battery 10 to be used and the rated voltage of the lead storage battery 10 is defined as P0 (W), A discharge pulse current Ip including a pulse power P greater than or equal to the value P0 is applied to the electrode 12.

  For example, when a lead storage battery 10 having a negotiating voltage of 12 V and a battery capacity of 20 Ah is used, if pulse discharge of 40 A is performed, 480 W of pulse power P is applied by discharge. On the other hand, since the current in the 1C discharge is 20 A, the power value P0 is 240W. In this case, a discharge pulse current Ip for generating a pulse power P having a magnitude equal to or larger than a power value P0 obtained by multiplying the 1C discharge current with respect to the battery capacity (Ah) of the lead storage battery 10 by the rated voltage of the lead storage battery 10 is applied to the electrode 12. It is applied. In FIG. 2, the discharge pulse current Ip is easily determined as a peak value. However, as described above, in the case of a more complicated waveform, the average value or effective value thereof is regarded as being replaced with almost Ip. The lead-acid battery regeneration device 100 according to an embodiment of the present invention is included.

  In this way, by applying the discharge pulse current Ip that generates the pulse power P corresponding to the size of the battery capacity of the lead storage battery 10 to the electrode 12, adverse effects due to heat generation of the electrode 12 due to excessive current application are reduced. However, the sulfation formed on the surface of the electrode 12 can be more reliably destroyed from the inside of the electrode 12.

  As described above, conventionally, the pulse current applied to remove the sulfation attached to the electrode 12 is often a weak pulse current of about 0.01 to 0.10 A. For this reason, depending on the use conditions of the lead storage battery 10 and the progress of the sulfation, the sulfation may not be sufficiently removed and the lead storage battery 10 may not be regenerated.

  On the other hand, in this embodiment, a discharge pulse current of a predetermined magnitude or more corresponding to the battery capacity of the lead storage battery 10 is charged to the electrode 12 as a discharge pulse current for the lead storage battery 10 when the lead storage battery 10 is charged. The electrode 12 is repeatedly applied to activate the electrode 12, particularly the negative electrode 12b in which deterioration due to sulfation is noticeable, so that the sulfation is removed.

  Thus, in this embodiment, when charging the lead storage battery 10, a discharge pulse current of a predetermined magnitude or more corresponding to the battery capacity of the lead storage battery 10 is applied to the electrode 12 to remove sulfation, The battery performance is improved to extend the life of the lead storage battery 10. That is, by applying a discharge pulse current Ip having a power of a predetermined magnitude or more corresponding to the battery capacity of the lead storage battery 10 to the electrode 12 when charging the lead storage battery 10, and generating the pulse power, The electrode 12 can be given a shock that is minimally necessary for removing the sulfation.

  For this reason, the surface of the electrode 12 can be activated and the sulfation adhering to the electrode 12 can be more reliably removed while reducing the adverse effect of the heat generation of the electrode 12 due to excessive current application. Further, since the discharge pulse current Ip including the minimum pulse power necessary for removing the sulfation attached to the electrode 12 is applied to the electrode 12 to reliably remove the sulfation, the risk of applying an excessive current to the electrode 12 is reduced. Thus, it is possible to save power by removing the sulfation by the lead storage battery regeneration device 100.

  Next, the operation of sulfation removal by the lead storage battery regeneration device 100 according to one embodiment of the present invention will be described with reference to the drawings. FIGS. 5A to 5C are operation explanatory views of sulfation removal by the lead-acid battery regeneration device 100 according to one embodiment of the present invention.

  As shown in FIG. 5A, sulfation Su, which is a non-conductive lead sulfate crystal film, is generated on the surface 12c of the electrode 12 when the lead storage battery 10 is discharged. Since sulfation Su is a very soft substance at the time of generation, it adheres to the surface 12c of the electrode 12 in a flexible manner, but grows into a strong crystal over time.

  However, by repeating the discharging and charging of the lead storage battery 10, the sulfation Su attached to the surface 12c of the electrode 12 becomes hard and covers the surface 12c of the electrode 12 as shown in FIG. In particular, when the sulfation Su deposited on the lead storage battery 10 is left in a self-discharged state for a long period of time, the crystallized sulfation Su becomes extremely hard and does not return to the electrolyte 13 even if it is charged again.

  For this reason, in the present embodiment, as shown in FIG. 5C, a pulse power of a predetermined magnitude or more is periodically generated during charging after the sulfation Su is deposited on the surface 12c of the electrode 12. A discharge pulse current Ip is applied to the electrode 12 so that the sulfation Su attached to the surface 12c of the electrode 12 is suspended from the surface 12c. At this time, a large discharge pulse current Ip is applied at the time of charging when the current flows from the electrolyte 13 to the negative electrode 12b so that the discharge pulse current Ip applied to the electrode 12 generates a pulse power of a predetermined magnitude or more. Therefore, since the reverse current is generated and the sulfation Su can be efficiently destroyed by the ions from the inside of the negative electrode 12b, the sulfation Su can be reliably removed from the surface 12c of the electrode 12.

  That is, the hardened sulfation Su is easily destroyed and removed by applying to the electrode 12 a discharge pulse current Ip having a magnitude that generates a pulse power of a predetermined magnitude or more when the lead storage battery 10 is charged. be able to. For this reason, since the deterioration of the electrode 12 due to the hardened sulfation Su is eliminated and the lead storage battery 10 can recover the battery performance more reliably, the life of the lead storage battery 10 can be extended.

  Next, experimental results that demonstrate the effects of the above-described embodiment of the present invention will be described. In this example, the pulse current Ip, the pulse width T1, and the pulse period T applied to the electrode 12 of the lead storage battery 10 that is a test body in the lead storage battery regeneration device 100 according to one embodiment of the present invention are adjusted, and the pulse The relationship between the number of charge / discharge cycles and the discharge end voltage for each cycle when the power was changed was investigated. Then, the time-dependent change in the discharge end voltage with the increase in the number of cycles when the current value I, the pulse width T1, the pulse period T, and the pulse power of the discharge pulse current Ip are changed, and the fluctuation of the discharge end voltage is determined. By analyzing, the life extension effect of the lead storage battery 10 by removing the sulfation of the lead storage battery 10 by applying the discharge pulse current Ip was confirmed. In addition, this invention is not limited to a present Example.

  In this example, five lead storage batteries 10 having a battery capacity of 12V20Ah were used as test specimens, a battery charger (SB-15) manufactured by Japan Stabilizer Industry for one lead storage battery, and pulse generation A lead storage battery regeneration device 100 according to an embodiment of the present invention, which is a container, was attached and tested. Moreover, the cycle of charging / discharging of the lead storage battery 10 in the present example was performed once per day, with a total of 24 hours of charging for 16 hours and discharging for 8 hours as one cycle.

  Table 1 below shows the modes of the discharge pulse current Ip, which is the condition for applying the pulse power to each of the specimens P1 to P5 in this example.

  As shown in Table 1, the test specimen P1 has a discharge pulse current Ip of 20 A, a pulse width T1 of 0.01 seconds, and a pulse period T of 900 seconds. Therefore, the generated pulse power is 240 W, and the energy per pulse is The average pulse power was 2.4 J and 2.4 J. On the other hand, the specimen P2 has a discharge pulse current Ip of 20A, a pulse width T1 of 0.2 seconds, and a pulse period T of 300 seconds, so that the generated pulse power is 240 W, the energy per pulse is 48 J, and the average pulse power. Was 0.160W. In addition, since the test body P3 has a discharge pulse current Ip of 20A, a pulse width T1 of 0.2 seconds, and a pulse period T of 3600 seconds, the generated pulse power is 240 W, the energy per pulse is 48 J, and the average pulse power. Was 0.013W. In addition, since the test body P4 has a discharge pulse current Ip of 60 A, a pulse width T1 of 0.01 seconds, and a pulse period T of 300 seconds, the generated pulse power is 720 W, the energy per pulse is 7.2 J, and the average The pulse power was 0.024W. Further, since the test body P5 did not apply the discharge pulse current Ip, the discharge pulse current Ip was 0 A, the pulse width T1 was 0 seconds, the pulse period T was 0 seconds, the generated pulse power was 0 W, the pulse Each energy was 0 J, and the average pulse power was 0 W.

  Moreover, the graph of the relationship between the charging / discharging cycle number to each test body P1 thru | or P5 and the discharge completion voltage for every cycle is shown in FIG. As shown in FIG. 6, in the test body P5 in which the pulse power is not applied to the electrode, the discharge end voltage is steadily decreased as the number of cycles increases, whereas the test body P1 in which the pulse power is applied to the electrode. In all of P4 to P4, even if the number of cycles increased, the discharge end voltage did not decrease and was within a predetermined numerical range.

  From this, as a reference for the pulse power supplied to the electrode, by applying a pulse power having a magnitude greater than or equal to the power value calculated by multiplying the 1C discharge current to the battery capacity by the rated voltage V of the lead acid battery, Since the generated sulfation was destroyed, it was found that the discharge end voltage drop was suppressed. That is, by applying to the electrodes a discharge pulse current Ip containing a power value P0 that is equal to or higher than the 1C discharge current for the battery capacity of the lead storage battery to be used and the rated voltage V of the lead storage battery. It was found that the life of the lead-acid battery can be extended because the drop in the discharge end voltage can be suppressed.

  Although the embodiments and examples of the present invention have been described in detail as described above, it will be understood by those skilled in the art that many modifications can be made without departing from the novel matters and effects of the present invention. It will be easy to understand. Therefore, all such modifications are included in the scope of the present invention.

  For example, a term described with a different term having a broader meaning or the same meaning at least once in the specification or the drawings can be replaced with the different term in any part of the specification or the drawings. Further, the configuration and operation of the lead-acid battery regeneration device are not limited to those described in the embodiments of the present invention, and various modifications can be made.

DESCRIPTION OF SYMBOLS 10 Lead acid battery, 11 Casing, 12 Electrode, 12a Positive electrode, 12b Negative electrode, 12c Surface, 13 Electrolyte, 14 Separator, 15 Terminal, 16 Power supply, 18 Charger, 20 Load, 100 Lead acid battery regeneration device, 102 Discharge pulse current supply Part, 104 control part, Su sulfation, Ip discharge pulse current, I current value, T1 pulse width, T2 pulse interval, T pulse period

Claims (3)

A lead-acid battery regeneration device that removes sulfation adhering to the electrode of the lead-acid battery,
A discharge pulse current supply unit for supplying a discharge pulse current to the electrode;
Detecting when the lead storage battery is charged, generating pulse power of a predetermined magnitude or more corresponding to the battery capacity of the lead storage battery only at the time of charging, and supplying the pulse power to the electrode A lead-acid battery regeneration device comprising a control unit for controlling a discharge pulse current supply unit.   The control unit adjusts a current value, a pulse width, and a pulse period of the discharge pulse current so as to generate the pulse power having a predetermined magnitude or more corresponding to the battery capacity. The lead-acid battery regeneration device according to claim 1, wherein:   The control unit generates a pulse power having a magnitude equal to or larger than a power value calculated by multiplying a 1 C discharge current with respect to the battery capacity by a rated voltage of the lead storage battery as a reference of the pulse power supplied to the electrode. The lead storage battery regeneration device according to claim 1, wherein the discharge pulse current supply unit is controlled.