JP2003111291A - Control method for charging secondary battery used in fuel battery power generating system - Google Patents
Control method for charging secondary battery used in fuel battery power generating systemInfo
- Publication number
- JP2003111291A JP2003111291A JP2001307259A JP2001307259A JP2003111291A JP 2003111291 A JP2003111291 A JP 2003111291A JP 2001307259 A JP2001307259 A JP 2001307259A JP 2001307259 A JP2001307259 A JP 2001307259A JP 2003111291 A JP2003111291 A JP 2003111291A
- Authority
- JP
- Japan
- Prior art keywords
- charging
- charge
- refresh
- control method
- secondary battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Fuel Cell (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、燃料電池発電シス
テムに用いる二次電池の充電制御方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging control method for a secondary battery used in a fuel cell power generation system.
【０００２】[0002]
【従来の技術】近年、効率的なエネルギー利用の視点か
ら燃料電池によって発電を行うシステムが注目されてい
る。しかし、燃料電池のみで発電させようとした場合、
外部負荷の変動に対して燃料電池の出力応答性が悪いこ
とからシステム中に二次電池を併設して、外部負荷の消
費電力が燃料電池の特定出力未満のとき、燃料電池の余
剰電力を二次電池を充電しながら外部負荷に供給し、外
部負荷の消費電力が燃料電池の特定出力を上回ったと
き、不足した電力を二次電池から供給する燃料電池発電
システムが提案されている。2. Description of the Related Art In recent years, a system for generating power by a fuel cell has been attracting attention from the viewpoint of efficient energy use. However, if you try to generate power only with a fuel cell,
Since the output response of the fuel cell is poor with respect to changes in the external load, a secondary battery is installed in the system, and when the power consumption of the external load is less than the specific output of the fuel cell, the surplus power of the fuel cell is A fuel cell power generation system has been proposed in which a secondary battery is supplied to an external load while being charged, and when the power consumption of the external load exceeds a specific output of the fuel cell, the insufficient power is supplied from the secondary battery.
【０００３】このような発電システムに用いる二次電池
として、経済性に優れ、信頼性、安全性の実績があり、
またリサイクル体制が確立されている鉛蓄電池を用いる
ことが検討されている。As a secondary battery used in such a power generation system, there is a track record of excellent economical efficiency, reliability and safety.
In addition, the use of lead-acid batteries for which a recycling system has been established is being considered.
【０００４】例えば無停電電源装置に用いられる鉛蓄電
池は停電時に放電可能な容量を確保し、かつ充電不足に
よる寿命の短縮を抑制するために規定の充電電圧で充電
され、充電状態（ＳＯＣ）が常時１００％近くになるよ
うに制御されている（フロート充電）。For example, a lead storage battery used for an uninterruptible power supply is charged at a prescribed charging voltage in order to secure a dischargeable capacity at the time of power failure and to suppress shortening of life due to insufficient charging, and the state of charge (SOC) is It is always controlled to be close to 100% (float charging).
【０００５】ところが前記したような燃料電池発電シス
テムに用いる鉛蓄電池は、負荷が小さいときに燃料電池
からの余剰電力を蓄電する必要上、鉛蓄電池のＳＯＣを
１００％未満の状態に保持する必要がある。However, the lead storage battery used in the fuel cell power generation system as described above needs to store the surplus electric power from the fuel cell when the load is small, and it is necessary to keep the SOC of the lead storage battery at less than 100%. is there.
【０００６】また、鉛蓄電池のＳＯＣが常に１００％に
近い状態で充電制御する場合、完全充電時の電池電圧と
放電時の電池電圧との間に大きな差が発生し、結果とし
て電力損失が大きくなる。この時の放電電力／充電電力
の比率（発電効率）は７０〜７５％程度であり、充電電
力の２５〜３０％が電力損失として失われる。Further, when the charge control is performed in a state where the SOC of the lead storage battery is always close to 100%, a large difference occurs between the battery voltage at the time of full charge and the battery voltage at the time of discharge, resulting in a large power loss. Become. The discharging power / charging power ratio (power generation efficiency) at this time is about 70 to 75%, and 25 to 30% of the charging power is lost as a power loss.
【０００７】一方、前記したようにＳＯＣを１００％未
満の部分充電状態とすれば充電時の充電電圧を低くする
ことができ、放電時の電池電圧はＳＯＣが極端に低下し
ないかぎりそれほど低下することはないので、充電時と
放電時の電圧差を小さくでき、結果として電力損失を従
来の２５〜３０％から１０〜１５％まで抑制できるとい
う利点がある。On the other hand, as described above, if the SOC is set to a partially charged state of less than 100%, the charging voltage at the time of charging can be lowered, and the battery voltage at the time of discharging will be so low unless the SOC is extremely lowered. Therefore, there is an advantage that the voltage difference between charging and discharging can be reduced, and as a result, the power loss can be suppressed from 25 to 30% of the conventional case to 10 to 15%.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、このよ
うに鉛蓄電池のＳＯＣを１００％未満の部分充電状態に
連続して保持しつづけた場合、放電が深くなる状態が続
き鉛蓄電池にとっては好ましくない充電不足状態に陥っ
てしまう恐れがある。However, when the SOC of the lead storage battery is continuously maintained at a partial charge state of less than 100% in this way, the state of deep discharge continues, which is not preferable for the lead storage battery. There is a risk of falling into a shortage.
【０００９】鉛蓄電池において充電不足状態が発生する
過程を次に示す。The process in which an insufficient charge state occurs in a lead storage battery will be described below.
【００１０】放電状態の電池内の電解液濃度は放電によ
り電解液中の硫酸イオンが消費され、深い放電がされた
鉛蓄電池の電解液濃度は比較的低い状態にある。ここで
充電を行うと、
負極の充電反応 ＰｂＳＯ4＋２ｅ- → Ｐｂ＋ＳＯ4
2-
正極の充電反応 ＰｂＳＯ4＋２Ｈ2Ｏ → ＰｂＯ2＋
４Ｈ+＋２ｅ-
という反応に伴い、極板付近に高濃度の硫酸が生成す
る。この高濃度の硫酸が重力によって電槽の底方向に沈
降しセル内で濃度差が起こる。これを成層化と呼ぶ。成
層化が生じると、充電後の電池において一枚の極板の上
下で電解液濃度差による電位差ができ、外部からの充放
電とは関係なく極板上部では充電反応が、極板下部では
放電反応が生じる。また、充電中の電池においても鉛イ
オンの溶解度に差ができ、極板上部で充電がされやす
く、極板下部でされにくくなる。したがって、極板下部
の硫酸鉛が充電されずに取り残され、容量の減少、すな
わち硫酸鉛蓄積（サルフェーション）の原因ともなる。
このような現象は制御弁式（密閉式）鉛蓄電池よりも、
液式鉛蓄電池で生じやすい。またサルフェーションが起
こると、充電受け入れ性が低下するのみでなく、完全充
電状態まで回復しにくくなる。Regarding the concentration of the electrolytic solution in the battery in the discharged state, the sulfuric acid ions in the electrolytic solution are consumed by the discharge, and the concentration of the electrolytic solution in the lead-acid battery subjected to deep discharge is relatively low. When charging is performed here, the negative electrode charging reaction PbSO 4 + 2e − → Pb + SO 4
2- Charge reaction of positive electrode PbSO 4 + 2H 2 O → PbO 2 +
Along with the reaction of 4H + + 2e −, a high concentration of sulfuric acid is generated near the electrode plate. Due to gravity, this high-concentration sulfuric acid settles toward the bottom of the battery case, causing a difference in concentration within the cell. This is called stratification. When stratification occurs, there is a potential difference between the upper and lower sides of one electrode plate in the battery after charging due to the difference in the electrolyte concentration. A reaction occurs. Further, even in the battery during charging, there is a difference in solubility of lead ions, so that the upper part of the electrode plate is easily charged and the lower part of the electrode plate is difficult to be charged. Therefore, the lead sulfate under the electrode plate is left uncharged and left behind, leading to a decrease in capacity, that is, lead sulfate accumulation (sulfation).
This phenomenon is more important than the control valve type (sealed) lead acid battery.
It tends to occur in liquid lead acid batteries. Further, when sulfation occurs, not only the charge acceptability decreases, but also it becomes difficult to recover to a fully charged state.
【００１１】このように、従来のように完全充電された
後も過充電される可能性がある運転制御方法や、ＳＯＣ
を低く設定することによる充電不足状態に陥る可能性の
ある運転制御方法で鉛蓄電池を使用する場合、鉛蓄電池
の寿命低下が課題となっていた。As described above, the conventional operation control method and SOC that may be overcharged even after being fully charged.
When a lead storage battery is used in an operation control method that may cause a charge shortage state by setting a low value, reduction of the life of the lead storage battery has been a problem.
【００１２】本発明は、上記課題を解決するものであ
り、燃料電池と併設する二次電池の充放電電力の高効率
利用および、長寿命化の両立を可能とする充電方法を提
供することを目的とするものである。The present invention is to solve the above-mentioned problems, and to provide a charging method capable of achieving both high efficiency utilization of charging / discharging power of a secondary battery provided with a fuel cell and a long life. It is intended.
【００１３】[0013]
【課題を解決するための手段】上記目的を達成するため
に、本発明の請求項１に係る発明は、燃料電池発電シス
テムに用いる二次電池の充電制御方法であって、燃料電
池の通常運転時に二次電池の充電状態（ＳＯＣ）を１０
０％未満に制御するとともに、所定の間隔でリフレッシ
ュ充電を行い、前記リフレッシュ充電における充電電気
量を検出し、この充電電気量が所定の値に到達した時点
でリフレッシュ充電を完了することを特徴とする燃料電
池発電システムに用いる二次電池の充電制御方法を示す
ものである。In order to achieve the above object, the invention according to claim 1 of the present invention is a charging control method for a secondary battery used in a fuel cell power generation system, which is a normal operation of a fuel cell. Sometimes the state of charge (SOC) of the secondary battery is 10
While controlling to less than 0%, refresh charging is performed at a predetermined interval, the amount of charge electricity in the refresh charge is detected, and the refresh charge is completed when the amount of charge electricity reaches a predetermined value. 2 shows a charging control method for a secondary battery used in a fuel cell power generation system that operates.
【００１４】なおリフレッシュ充電とは、鉛蓄電池のＳ
ＯＣを１００％とした上で、さらに充電を行うものであ
る。Note that refresh charging means S for lead acid batteries.
The charging is further performed after setting the OC to 100%.
【００１５】本発明の請求項２に係る発明は、請求項１
に記載の充電制御方法において、リフレッシュ充電を行
う間隔が３０日以内であることを特徴とするものであ
る。The invention according to claim 2 of the present invention is claim 1
In the charge control method described in (3), the refresh charging interval is within 30 days.
【００１６】本発明の請求項３に係る発明は、請求項１
または２に記載の充電制御方法において、リフレッシュ
充電での充電電流値が、０．０１ＣＡ以上０．２ＣＡ以
下であって、一回のリフレッシュ充電での充電電気量を
前記二次電池容量の２％より大きく５０％未満に設定す
ることを特徴とするものである。The invention according to claim 3 of the present invention is claim 1
Alternatively, in the charge control method according to 2, the charge current value in refresh charging is 0.01 CA or more and 0.2 CA or less, and the charge electricity amount in one refresh charging is 2% of the secondary battery capacity. It is characterized by being set to a larger value and less than 50%.
【００１７】本発明の請求項４に係る発明は、請求項１
〜３のいずれかに記載の充電制御方法において、前記燃
料電池の出力電圧が所定の電圧に達している時間と二次
電池の充電電流とを積算することにより、充電電気量を
検出することを特徴とするものである。The invention according to claim 4 of the present invention is claim 1
In the charging control method according to any one of 1 to 3, it is possible to detect the amount of charged electricity by integrating the time when the output voltage of the fuel cell reaches a predetermined voltage and the charging current of the secondary battery. It is a feature.
【００１８】[0018]
【発明の実施の形態】図１は、本発明の実施形態の一例
を示すものであり、鉛蓄電池を併設した燃料電池発電シ
ステムを含み安定した電力を負荷へと供給する電力変換
装置を備えた燃料電池発電システム構成を示すものであ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of an embodiment of the present invention, which includes a fuel cell power generation system equipped with a lead storage battery and which is provided with a power converter for supplying stable power to a load. 1 shows a configuration of a fuel cell power generation system.
【００１９】燃料電池１の直流出力は電力変換装置２に
入力されて交流出力に変換されて負荷３に必要な電力を
供給する構成になっている。鉛蓄電池４は充電器５を介
して燃料電池１と接続されており、燃料電池１の出力に
余剰があるときや、鉛蓄電池４のＳＯＣを上昇させると
きに充電器５を介して燃料電池１から充電される。The DC output of the fuel cell 1 is input to the power converter 2 and converted into an AC output to supply the required power to the load 3. The lead storage battery 4 is connected to the fuel cell 1 through the charger 5, and when the output of the fuel cell 1 has a surplus or when the SOC of the lead storage battery 4 is increased, the lead storage battery 4 is connected through the charger 5 to the fuel cell 1. Is charged from.
【００２０】さらに鉛蓄電池４は逆流防止ダイオード
６、および、放電制御用スイッチ７を通して電力変換装
置２の入力に接続され、負荷３が増大し、燃料電池１の
みでは負荷に追従できないときに放電制御用スイッチ７
が閉じ、鉛蓄電池４より電力変換装置２を通して負荷３
に電力が供給される。Further, the lead storage battery 4 is connected to the input of the power conversion device 2 through the backflow prevention diode 6 and the discharge control switch 7, and the load 3 increases, and the discharge control is performed when the fuel cell 1 alone cannot follow the load. Switch 7
Is closed, and the lead storage battery 4 causes the load 3 to pass through the power converter 2.
Is powered.
【００２１】本発明においては鉛蓄電池のＳＯＣは通常
５０〜９０％程度の部分充電状態で保持され、鉛蓄電池
のＳＯＣ制御は充電電圧を制御することにより行われ
る。また、所定期間毎に鉛蓄電池のＳＯＣを１００％と
した上でさらに充電を行うリフレッシュ充電が行われ
る。このリフレッシュ充電の頻度は後述するが少なくと
も３０日以内が好ましい。In the present invention, the SOC of the lead storage battery is normally maintained in a partially charged state of about 50 to 90%, and the SOC control of the lead storage battery is performed by controlling the charging voltage. In addition, refresh charging is performed in which the SOC of the lead storage battery is set to 100% and the charging is further performed every predetermined period. The frequency of this refresh charge will be described later, but is preferably at least 30 days.
【００２２】充電器５には、リフレッシュ充電の際の鉛
蓄電池への充電電気量を検出する手段が備わっており、
この充電電気量が所定の値に到達した時点でリフレッシ
ュ充電が終了する。充電電気量を検出する手段としては
リフレッシュ充電時の充電電気量を充電時間で積算すれ
ば良い。The charger 5 is equipped with means for detecting the amount of electricity charged to the lead storage battery during refresh charging.
The refresh charging ends when the amount of charge reaches a predetermined value. As a means for detecting the charge electricity amount, the charge electricity amount at the time of refresh charging may be integrated by the charging time.
【００２３】本発明においてはこのリフレッシュ充電に
おける充電電流値を０．０１ＣＡ以上０．２ＣＡ以下の
範囲に設定することが好ましい。この充電電流値を０．
０１ＣＡ未満とした場合にはリフレッシュ充電に要する
時間が長くなる結果、燃料電池１からの余剰電力を受け
入れ可能な時間が短くなり、好ましくない。また充電電
流値を０．２ＣＡより大きくするとリフレッシュ充電中
の電池からの発熱が大きく、電池内部の電解液中の水分
が減少して寿命低下する可能性が高くなる。In the present invention, it is preferable to set the charging current value in this refresh charging in the range of 0.01 CA or more and 0.2 CA or less. This charging current value is set to 0.
When it is less than 01 CA, the time required for refresh charging becomes long, and as a result, the time during which the surplus power from the fuel cell 1 can be accepted becomes short, which is not preferable. Further, if the charging current value is larger than 0.2 CA, the heat generated from the battery during refresh charging is large, and the water content in the electrolytic solution inside the battery is reduced, which may increase the life.
【００２４】また、本発明においてはリフレッシュ充電
における鉛蓄電池への充電電気量は電池容量の少なくと
も２％より大きく５０％未満に設定することが鉛蓄電池
の寿命を確保する上で好ましい。Further, in the present invention, it is preferable to set the amount of electricity charged to the lead storage battery in the refresh charging to be larger than at least 2% and less than 50% of the battery capacity in order to secure the life of the lead storage battery.
【００２５】リフレッシュ充電を行う期間は、予めタイ
ムスケジュールによって設定することが可能であり、こ
の値は燃料電池の運転状況、および、蓄電池の残存容量
などによって変更することができる。また、リフレッシ
ュ充電を行う上での電流値、および、電池容量に対する
電気量も同様に変更可能である。The period for refresh charging can be set in advance by a time schedule, and this value can be changed depending on the operating condition of the fuel cell, the remaining capacity of the storage battery, and the like. In addition, the current value for refresh charging and the amount of electricity with respect to the battery capacity can be changed in the same manner.
【００２６】[0026]
【実施例】前記した発明の実施形態において、充電電気
量の設定値とリフレッシュ充電期間の間隔を変化させ
て、システムを所定期間運転したときの鉛蓄電池の容量
維持率を測定した。鉛蓄電池としては公称電圧１２Ｖ、
定格容量４０Ａｈの制御弁式鉛蓄電池を２個直列にした
２４Ｖ電池を用いた。EXAMPLE In the embodiment of the invention described above, the capacity maintenance rate of the lead storage battery when the system was operated for a predetermined period was measured by changing the set value of the charge electricity amount and the interval of the refresh charging period. As a lead-acid battery, the nominal voltage is 12V,
A 24V battery in which two control valve type lead storage batteries having a rated capacity of 40Ah were connected in series was used.
【００２７】鉛蓄電池のＳＯＣの制御パターンは図２に
示すようなパターンとした。このパターンは実際に二次
電池が置かれるであろう状況に基づいて充放電パターン
を設定することにより決定される。なお、１日を１サイ
クルとした。図２に示すように、通常運転における平均
ＳＯＣを１００％未満（５０〜９５％）に制御し、所定
の期間が経過した時点（図２の例では１２日毎）でＳＯ
Ｃを１００％とし、リフレッシュ充電により所定の充電
電気量分の充電を行った。リフレッシュ充電間隔は、１
日毎、３日毎、１０日毎、２０日毎、３０日毎、４０日
毎、５０日毎、そして、リフレッシュ充電なしの条件で
実施した。The SOC control pattern of the lead storage battery was set as shown in FIG. This pattern is determined by setting the charge / discharge pattern based on the situation in which the secondary battery will actually be placed. Incidentally, one day was defined as one cycle. As shown in FIG. 2, the average SOC in normal operation is controlled to be less than 100% (50 to 95%), and SO is measured at the time when a predetermined period has elapsed (every 12 days in the example of FIG. 2).
C was set to 100%, and a predetermined amount of charge electricity was charged by refresh charging. Refresh charge interval is 1
It was carried out every day, every 3 days, every 10 days, every 20 days, every 30 days, every 40 days, every 50 days, and under the condition without refresh charge.
【００２８】鉛蓄電池は、ＳＯＣ＝５０％の時点で完全
放電を行い、放電容量を測定した後、ＳＯＣを５０％の
状態まで充電し、サイクルを続行した。そして、この放
電容量が初期の５０％に低下した時点で鉛蓄電池の寿命
期間とした。なお、これらの寿命期間の結果を、リフレ
ッシュ充電間隔を１０日、リフレッシュ充電電気量を電
池容量の１５％とした時の寿命期間を１００として図３
に示した。The lead storage battery was completely discharged at the time of SOC = 50%, and after measuring the discharge capacity, the SOC was charged to the state of 50% and the cycle was continued. Then, when the discharge capacity decreased to 50% of the initial value, the life of the lead storage battery was set. The results of these life periods are shown in FIG. 3 when the refresh charge interval is 10 days and the refresh charge electricity amount is 15% of the battery capacity.
It was shown to.
【００２９】図３に示されるように、リフレッシュ充電
間隔が４０日を超えると、リフレッシュ充電電気量を多
くしても寿命は低下する。この電池を分解調査したとこ
ろ充電不足によって電極極板上に生成した硫酸鉛が固定
化している状態が観察された。したがって、本発明にお
いては少なくともリフレッシュ充電間隔を３０日以内に
設定することが必要であり、リフレッシュ充電間隔がそ
れより長くなると、リフレッシュ充電を実施しても硫酸
鉛結晶の還元が難しくなり、電池容量は回復しない。一
方リフレッシュ充電間隔を短くすると、過充電によって
寿命が低下する場合があるので、リフレッシュ充電間隔
を１０以上３０日以内に設定することが好ましい。As shown in FIG. 3, when the refresh charge interval exceeds 40 days, the life is shortened even if the refresh charge electricity quantity is increased. As a result of disassembling and investigating this battery, it was observed that lead sulfate formed on the electrode plate was immobilized due to insufficient charging. Therefore, in the present invention, it is necessary to set at least the refresh charge interval within 30 days, and if the refresh charge interval is longer than that, it becomes difficult to reduce the lead sulfate crystal even if the refresh charge is performed, and the battery capacity is reduced. Does not recover. On the other hand, if the refresh charging interval is shortened, the life may be shortened due to overcharging. Therefore, it is preferable to set the refresh charging interval within 10 to 30 days.
【００３０】また、一回のリフレッシュ充電での電気量
が電池容量の２％以下の場合、充電不足状態による電池
極板のサルフェーションの発生によって電池寿命は極端
に低下する場合がある。一方、リフレッシュ充電での充
電電気量が電池の容量の５０％以上になると、一回のリ
フレッシュ充電における電気量が大きいため、リフレッ
シュ充電間隔を変化させても、明らかに過充電が原因に
よる寿命低下が見られた。したがって、充電電気量を２
％より大きく５０％未満、好ましくは５％以上３０％以
下とすることが望ましい。なお、過充電状態によりガス
発生や電池温度の上昇など、様々な弊害を生じ、蓄電池
の寿命が低下することが考えられる。When the amount of electricity in one refresh charge is 2% or less of the battery capacity, the battery life may be extremely reduced due to sulfation of the battery electrode plate due to insufficient charging. On the other hand, when the amount of electricity charged in refresh charging is 50% or more of the capacity of the battery, the amount of electricity in one refresh charging is large, so even if the refresh charging interval is changed, the life will obviously decrease due to overcharging. It was observed. Therefore, the charge amount is 2
% And less than 50%, preferably 5% or more and 30% or less. It is conceivable that various problems such as gas generation and battery temperature rise may occur due to the overcharged state, and the life of the storage battery may be shortened.
【００３１】なお本実施例において、最も電池の寿命に
対して効果的なリフレッシュ充電を可能としたのは、電
池容量比に対してリフレッシュ充電電気量が１５％、充
電間隔を１０日とした条件であった。In this embodiment, the most effective refresh charging for the battery life is achieved under the condition that the refresh charge electricity amount is 15% of the battery capacity ratio and the charging interval is 10 days. Met.
【００３２】図４は、鉛蓄電池をリフレッシュ充電する
ときの電流値と、電池温度の最大上昇値との関係を示し
た図である。図４に示した結果からリフレッシュ充電に
おける電流値が０．２ＣＡ以上になると、充電されてい
る鉛蓄電池の温度が急激に上昇していることがわかる。
電池内の温度が一定温度以上に上昇する時間が長くなる
と、電解液が減少することにより内部抵抗が増大し、放
電できなくなるといった問題が生ずる。さらに、電池の
温度が１０℃高いと電極格子の腐食が２倍に加速する、
といったデータが得られていることから、電池の寿命が
電極格子の腐食によるものであった場合、寿命が半分に
なることを意味する。FIG. 4 is a diagram showing the relationship between the current value when the lead storage battery is refresh charged and the maximum rise value of the battery temperature. From the results shown in FIG. 4, it can be seen that when the current value in refresh charging becomes 0.2 CA or more, the temperature of the lead storage battery being charged rises sharply.
When the temperature in the battery rises above a certain temperature for a long time, the electrolyte decreases and the internal resistance increases, which causes a problem that discharge cannot be performed. Furthermore, when the temperature of the battery is higher by 10 ° C, the corrosion of the electrode grid is doubled,
From the data obtained, it means that if the battery life is due to the corrosion of the electrode grid, the life will be halved.
【００３３】これらのことから、電池の温度上昇による
寿命低下を抑えながら、システムを効率的に作動させる
ためには、リフレッシュ充電を行うときの電流値を少な
くとも０．２ＣＡ以下、リフレッシュ充電を短時間で完
了することを考慮すれば０．０１ＣＡ以上とすることが
好ましい。From these facts, in order to operate the system efficiently while suppressing the life reduction due to the temperature rise of the battery, the current value at the time of refresh charging is at least 0.2 CA or less, and the refresh charging is performed for a short time. Considering that the process is completed, it is preferably 0.01 CA or more.
【００３４】以上のことから、充放電電力効率を高める
ためにＳＯＣを１００％未満に制御する場合に本発明の
構成を用いれば電池の寿命を確保することができる。From the above, when the SOC is controlled to less than 100% in order to improve the charge / discharge power efficiency, the battery life can be secured by using the configuration of the present invention.
【００３５】[0035]
【発明の効果】本発明の燃料電池発電システムに用いる
二次電池の充電制御方法によると、二次電池として用い
る鉛蓄電池の高効率化と長寿命化との両立が可能とな
る。According to the charge control method for the secondary battery used in the fuel cell power generation system of the present invention, it is possible to achieve both high efficiency and long life of the lead storage battery used as the secondary battery.
【図１】本発明における燃料電池発電システムを示す図FIG. 1 is a diagram showing a fuel cell power generation system according to the present invention.
【図２】本発明におけるＳＯＣ制御パターンの一例を示
す図FIG. 2 is a diagram showing an example of an SOC control pattern in the present invention.
【図３】リフレッシュ充電の間隔、リフレッシュ充電電
気量および電池寿命の関係を示す図FIG. 3 is a diagram showing a relationship between a refresh charge interval, a refresh charge amount and a battery life.
【図４】リフレッシュ充電電流値と電池温度最大上昇値
との関係を示す図FIG. 4 is a diagram showing a relationship between a refresh charge current value and a maximum battery temperature rise value.
１ 燃料電池 ２ 電力変換装置 ３ 負荷 ４ 鉛蓄電池 ５ 充電器 ６ 逆流防止ダイオード ７ 放電制御用スイッチ 1 fuel cell 2 Power converter 3 load 4 Lead acid battery 5 charger 6 Backflow prevention diode 7 Discharge control switch
フロントページの続き (72)発明者 神保 裕行 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 Ｆターム(参考） 5G003 AA05 CA15 CB06 DA06 DA12 EA05 5H030 AA01 AS20 BB01 BB08 FF41 FF42 FF52 Continued front page (72) Inventor Hiroyuki Jimbo 1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric Sangyo Co., Ltd. F-term (reference) 5G003 AA05 CA15 CB06 DA06 DA12 EA05 5H030 AA01 AS20 BB01 BB08 FF41 FF42 FF52
Claims (4)
の充電制御方法であって、燃料電池の通常運転時に二次
電池の充電状態（ＳＯＣ）を１００％未満に制御すると
ともに、所定の間隔でリフレッシュ充電を行い、前記リ
フレッシュ充電における充電電気量を検出し、この充電
電気量が所定の値に到達した時点でリフレッシュ充電を
完了することを特徴とする燃料電池発電システムに用い
る二次電池の充電制御方法。1. A method for controlling charging of a secondary battery used in a fuel cell power generation system, comprising controlling the state of charge (SOC) of the secondary battery to be less than 100% during normal operation of the fuel cell, and at a predetermined interval. Charging a secondary battery used in a fuel cell power generation system, characterized in that refresh charging is performed, the amount of charge electricity in the refresh charge is detected, and the refresh charge is completed when the amount of charge electricity reaches a predetermined value. Control method.
日以内であることを特徴とする請求項１記載の充電制御
方法。2. The interval at which the refresh charging is performed is 30.
The charging control method according to claim 1, wherein the charging control method is within a day.
が、０．０１ＣＡ以上０．２ＣＡ以下であって、一回の
リフレッシュ充電での充電電気量を前記二次電池容量の
２％より大きく５０％未満に設定することを特徴とする
請求項１または２に記載の充電制御方法。3. The charge current value in the refresh charge is 0.01 CA or more and 0.2 CA or less, and the charge electricity amount in one refresh charge is more than 2% and 50% of the secondary battery capacity. The charge control method according to claim 1 or 2, wherein the charge control method is set to less than.
達している時間と前記二次電池の充電電流とを積算する
ことにより、前記充電電気量を検出することを特徴とす
る請求項１〜３のいずれかに記載の充電制御方法。4. The charge electricity amount is detected by integrating the time during which the output voltage of the fuel cell reaches a predetermined voltage and the charging current of the secondary battery. The charge control method according to any one of 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001307259A JP2003111291A (en) | 2001-10-03 | 2001-10-03 | Control method for charging secondary battery used in fuel battery power generating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001307259A JP2003111291A (en) | 2001-10-03 | 2001-10-03 | Control method for charging secondary battery used in fuel battery power generating system |
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|---|---|
| JP2003111291A true JP2003111291A (en) | 2003-04-11 |
Family
ID=19126754
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007086231A1 (en) * | 2006-01-27 | 2007-08-02 | Toyota Jidosha Kabushiki Kaisha | Cooling fan control device and method |
| WO2010137334A1 (en) * | 2009-05-28 | 2010-12-02 | パナソニック株式会社 | Lead storage battery charging control method, charging control circuit, power source device and lead storage battery |
| JP2011015590A (en) * | 2009-07-06 | 2011-01-20 | Kansai Electric Power Co Inc:The | Secondary battery charging controller and secondary battery charging control program |
| CN103629135A (en) * | 2012-08-23 | 2014-03-12 | 现代自动车株式会社 | Cooling blower control device and method for high-voltage battery |
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2001
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|---|---|---|---|---|
| JP2007200780A (en) * | 2006-01-27 | 2007-08-09 | Toyota Motor Corp | Controller for cooling fan |
| WO2007086231A1 (en) * | 2006-01-27 | 2007-08-02 | Toyota Jidosha Kabushiki Kaisha | Cooling fan control device and method |
| US8219248B2 (en) | 2006-01-27 | 2012-07-10 | Toyota Jidosha Kabushiki Kaisha | Control device and control method for cooling fan |
| US8344698B2 (en) | 2009-05-28 | 2013-01-01 | Panasonic Corporation | Lead storage battery charging control method, charging control circuit, power source device, and lead storage battery |
| WO2010137334A1 (en) * | 2009-05-28 | 2010-12-02 | パナソニック株式会社 | Lead storage battery charging control method, charging control circuit, power source device and lead storage battery |
| JP4689768B2 (en) * | 2009-05-28 | 2011-05-25 | パナソニック株式会社 | Lead storage battery charge control method, charge control circuit, and power supply device |
| JP2011134717A (en) * | 2009-05-28 | 2011-07-07 | Panasonic Corp | Lead-acid battery |
| US8148938B2 (en) | 2009-05-28 | 2012-04-03 | Panasonic Corporation | Lead storage battery charging control method, charging control circuit, power source device, and lead storage battery |
| JP2011015590A (en) * | 2009-07-06 | 2011-01-20 | Kansai Electric Power Co Inc:The | Secondary battery charging controller and secondary battery charging control program |
| CN103629135A (en) * | 2012-08-23 | 2014-03-12 | 现代自动车株式会社 | Cooling blower control device and method for high-voltage battery |
| US9528719B2 (en) | 2012-08-23 | 2016-12-27 | Hyundai Motor Company | Cooling blower control device and method for high-voltage battery |
| JPWO2018199311A1 (en) * | 2017-04-28 | 2020-03-12 | 株式会社Ｇｓユアサ | Management device, power storage device, and power storage system |
| US11411409B2 (en) | 2017-04-28 | 2022-08-09 | Gs Yuasa International Ltd. | Management apparatus, energy storage apparatus, and energy storage system |
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