JP2003045503A - Method of estimating discharging capacity and discharging duration of secondary battery - Google Patents
Method of estimating discharging capacity and discharging duration of secondary batteryInfo
- Publication number
- JP2003045503A JP2003045503A JP2001236033A JP2001236033A JP2003045503A JP 2003045503 A JP2003045503 A JP 2003045503A JP 2001236033 A JP2001236033 A JP 2001236033A JP 2001236033 A JP2001236033 A JP 2001236033A JP 2003045503 A JP2003045503 A JP 2003045503A
- Authority
- JP
- Japan
- Prior art keywords
- discharge
- secondary battery
- estimating
- duration
- capacity
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
- G01R31/379—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator for lead-acid batteries
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/374—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Electric Status Of Batteries (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は二次電池、特に制御
弁式鉛蓄電池に適した放電容量と放電持続時間の推定方
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 secondary battery, and more particularly to a method of estimating discharge capacity and discharge duration suitable for a valve regulated lead acid battery.
【０００２】[0002]
【従来の技術】従来から、制御弁式鉛蓄電池は充放電を
繰り返すサイクル用途や、バックアップ用のトリクル用
途等に幅広く用いられてきている。このような電池の放
電可能な時間を推定するために、充放電回数を記録した
り、あるいは放電中の電池電圧の変化を測定し、これら
の測定値と放電時間との相関関係から放電時間を推定す
る等の方法が採用されている。2. Description of the Related Art Conventionally, a valve-regulated lead-acid battery has been widely used for cycle applications in which charge and discharge are repeated, backup trickle applications, and the like. In order to estimate the dischargeable time of such a battery, record the number of times of charging / discharging, or measure the change in battery voltage during discharging, and calculate the discharge time from the correlation between these measured values and discharge time. Methods such as estimation are used.
【０００３】無停電電源に用いる二次電池のように常に
充電された状態で使用される場合、二次電池の充電状態
は１００％でほぼ一定であるため、前記した方法でも精
度良く放電持続時間（放電容量）を推定することが可能
であった。また、様々な充電状態で使用されるサイクル
用途においては、二次電池の開路電圧から放電容量を推
定したり、放電持続時間を推定する方法も採られてい
た。When the secondary battery used in the uninterruptible power supply is always charged, the secondary battery has a constant charge state of 100%. Therefore, the discharge duration can be accurately measured by the above method. It was possible to estimate (discharge capacity). Further, in cycling applications used in various charge states, methods of estimating the discharge capacity from the open circuit voltage of the secondary battery or estimating the discharge duration have also been adopted.
【０００４】しかしながら、前記した方法においては二
次電池の使用状態や頻度が様々であると、放電持続時間
の推定精度が低下するという問題があった。また二次電
池がサイクル用途あるいはトリクル用途に限定されず、
これら両者が組み合わされたような使用条件での放電持
続時間の推定は、その推定精度が特に低下していた。However, in the above-mentioned method, there is a problem that the accuracy of estimating the discharge duration is lowered when the usage state and frequency of the secondary battery are varied. Also, the secondary battery is not limited to cycle applications or trickle applications,
The estimation accuracy of the discharge duration under the use condition in which both of them are combined was particularly low.
【０００５】[0005]
【発明が解決しようとする課題】本発明は前記する従来
の放電容量や放電持続時間の推定方法の問題点に鑑み、
二次電池の使用条件が様々であっても、精度良く放電容
量ならびに放電持続時間を推定することができる二次電
池の放電容量ならびに放電持続時間を推定する推定方法
を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the conventional methods of estimating the discharge capacity and the discharge duration.
It is an object of the present invention to provide an estimation method for estimating the discharge capacity and discharge duration of a secondary battery, which can accurately estimate the discharge capacity and discharge duration even when the usage conditions of the secondary battery vary. .
【０００６】[0006]
【課題を解決するための手段】前記した課題を解決する
ために、本発明の請求項１記載に係る発明は、二次電池
を少なくとも２回以上パルス放電を行い、前記二次電池
の放電電圧と放電時の二次電池自体の温度または二次電
池の周囲の雰囲気の温度を測定し、別にあらかじめ求め
た前記放電電圧および前記温度と放電容量との関係に基
づいて、前記二次電池の放電容量を推定する二次電池の
放電容量推定方法を示すものである。In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention is one in which a secondary battery is pulse-discharged at least twice, and the discharge voltage of the secondary battery is And the temperature of the secondary battery itself at the time of discharge or the temperature of the atmosphere around the secondary battery are measured, and based on the previously determined discharge voltage and the relationship between the temperature and the discharge capacity, discharge of the secondary battery It shows a method for estimating the discharge capacity of a secondary battery for estimating the capacity.
【０００７】また、本発明の請求項２記載に係る発明
は、請求項１記載に係る放電容量の推定方法による放電
容量の推定値とその二次電池のパルス放電後の負荷電流
の測定値とにより、別にあらかじめ求めた前記放電容量
および前記負荷電流と放電持続時間との関係に基づい
て、前記二次電池の放電持続時間を推定することを示す
ものである。According to a second aspect of the present invention, an estimated value of the discharge capacity by the method for estimating the discharge capacity according to the first aspect and a measured value of the load current of the secondary battery after pulse discharge are provided. According to the above, it is shown that the discharge duration of the secondary battery is estimated based on the relationship between the discharge capacity and the load current and the discharge duration that are separately obtained in advance.
【０００８】また、本発明の請求項３記載に係る発明
は、請求項１もしくは２の構成を備えた二次電池の放電
容量ならびに放電持続時間を推定する推定方法におい
て、前記二次電池は制御弁式鉛蓄電池であって、前記パ
ルス電流は正極表面積に対して３Ａ／ｄｍ2以上であ
り、パルス放電時間を５０ｍｓｅｃ以上としたことを示
すものである。According to a third aspect of the present invention, in the estimation method for estimating the discharge capacity and the discharge duration of the secondary battery having the structure of the first or second aspect, the secondary battery is controlled. The valve-type lead-acid battery shows that the pulse current is 3 A / dm 2 or more with respect to the positive electrode surface area, and the pulse discharge time is 50 msec or more.
【０００９】さらに、本発明の請求項４記載に係る発明
は、請求項１ないし３のいずれかに記載の二次電池の放
電容量ならびに放電持続時間を推定する推定方法におい
て、前記二次電池から負荷機器への負荷電流供給を指示
するステップの後、前記パルス放電を行い、その後負荷
機器への負荷電流供給を行うことを示すものである。The invention according to claim 4 of the present invention is the estimation method for estimating the discharge capacity and discharge duration of the secondary battery according to any one of claims 1 to 3, wherein After the step of instructing the load current supply to the load device, the pulse discharge is performed, and then the load current supply to the load device is performed.
【００１０】[0010]
【発明の実施の形態】本発明の実施の形態を図面を用い
て説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings.
【００１１】図１は本発明の実施の形態における放電容
量と放電持続時間を推定する推定方法のフローを示す図
面である。FIG. 1 is a diagram showing a flow of an estimation method for estimating a discharge capacity and a discharge duration according to an embodiment of the present invention.
【００１２】まず、負荷への電力供給の開始を指示する
信号が出力される（ステップ１）。この信号に基づき、
二次電池に図２で示したパルス放電が行われる。本発明
においてはパルス放電は少なくとも２回以上の複数回行
われる（ステップ２）。この時のパルス放電時間は５０
ｍｓｅｃ〜５００ｍｓｅｃの範囲で設定することが望ま
しい。パルス放電時間が５０ｍｓｅｃ未満では二次電池
の放電電圧が安定しないため、好ましくない。また、５
００ｍｓｅｃを超える放電時間では放電電圧は安定する
ものの、放電時間が長くなり、実用的ではない。また、
パルス放電中に行われる休止時間は２０ｍｓｅｃ〜５０
０ｍｓｅｃが好ましい。First, a signal instructing the start of power supply to the load is output (step 1). Based on this signal,
The pulse discharge shown in FIG. 2 is applied to the secondary battery. In the present invention, pulse discharge is performed a plurality of times at least twice (step 2). The pulse discharge time at this time is 50
It is desirable to set in the range of msec to 500 msec. If the pulse discharge time is less than 50 msec, the discharge voltage of the secondary battery is not stable, which is not preferable. Also, 5
Although the discharge voltage is stable when the discharge time exceeds 00 msec, the discharge time becomes long, which is not practical. Also,
The pause time during the pulse discharge is 20 msec to 50 msec.
0 msec is preferable.
【００１３】さらにパルス放電電流としては二次電池を
構成するセル中の正極板面積あたり３．０Ａ／ｄｍ2以
上で設定すれば、放電容量の推定精度が高まるので好ま
しい。Further, it is preferable to set the pulse discharge current to 3.0 A / dm 2 or more per positive electrode plate area in the cells constituting the secondary battery because the accuracy of estimating the discharge capacity is improved.
【００１４】このパルス放電においてｎ回目以降（但
し：ｎ≧２）のパルス放電における放電電圧Ｖｎを測定
する（ステップ４）。本発明では放電電圧測定を２回目
以降のパルス放電時に測定することにより、実施例で後
述するように放電容量の推定精度を高めることができ
る。In this pulse discharge, the discharge voltage Vn in the pulse discharge of the nth time and thereafter (however, n ≧ 2) is measured (step 4). In the present invention, the discharge voltage is measured at the time of the second and subsequent pulse discharges, so that the accuracy of estimating the discharge capacity can be improved, as will be described later in Examples.
【００１５】さらに二次電池自体の温度もしくは二次電
池の周囲の雰囲気の温度Ｔａを測定する（ステップ
３）。次にあらかじめ測定された二次電池もしくはその
周囲の雰囲気の温度Ｔａおよび放電電圧Ｖｎと放電容量
Ｃとの関係から放電容量の推定が行われる（ステップ
５）。放電容量Ｃを温度Ｔａと放電電圧Ｖｎとの関数と
して負荷の放電電流が一定の場合にはこの温度Ｔａ、放
電電圧Ｖｎと放電容量Ｃとの関係にかえてあらかじめ測
定された温度Ｔａおよび放電電圧Ｖｎと放電持続時間Ｔ
ｄとの関係（図３に例示）に基づいて推定しようとする
二次電池の放電持続時間Ｔｄを表示することもできる。Further, the temperature of the secondary battery itself or the temperature Ta of the atmosphere around the secondary battery is measured (step 3). Then, the discharge capacity is estimated from the relationship between the temperature Ta and the discharge voltage Vn of the secondary battery or the surrounding atmosphere measured in advance and the discharge capacity C (step 5). When the discharge capacity C is a function of the temperature Ta and the discharge voltage Vn, and the discharge current of the load is constant, the temperature Ta and the temperature Ta and the discharge voltage measured in advance by changing the relationship between the discharge voltage Vn and the discharge capacity C Vn and discharge duration T
It is also possible to display the discharge duration Td of the secondary battery to be estimated based on the relationship with d (illustrated in FIG. 3).
【００１６】なお、温度Ｔａ、放電電圧Ｖｎと放電容量
Ｃおよび放電持続時間Ｔｄとの関係については、例えば
温度Ｔａ別の放電電圧Ｖｎ−放電容量Ｃ、もしくは放電
電圧Ｖｎ−放電持続時間Ｔｄのテーブルをメモリに保存
しておき、温度Ｔａおよび放電電圧Ｖｎの測定値から放
電容量Ｃもしくは放電持続時間Ｔｄの値を呼び出せば良
い。Regarding the relationship between the temperature Ta and the discharge voltage Vn and the discharge capacity C and the discharge duration Td, for example, a table of discharge voltage Vn-discharge capacity C or discharge voltage Vn-discharge duration Td for each temperature Ta. Is stored in the memory, and the value of the discharge capacity C or the discharge duration Td may be retrieved from the measured values of the temperature Ta and the discharge voltage Vn.
【００１７】さらに好ましい例としては、次に二次電池
から負荷への給電が開始され（ステップ６）、二次電池
の負荷電流Ｉが測定される（ステップ７）。ここですで
に推定した放電容量Ｃおよび温度Ｔａとの関係に基づき
放電持続時間Ｔｄを推定することができる（ステップ
８）。As a more preferable example, next, power supply from the secondary battery to the load is started (step 6), and the load current I of the secondary battery is measured (step 7). Here, the discharge duration Td can be estimated based on the relationship between the discharge capacity C and the temperature Ta already estimated (step 8).
【００１８】ここで温度測定のステップ３は放電容量Ｃ
もしくは放電持続時間Ｔｄを推定するステップ５もしく
はステップ８以前に行えば良い。Here, the step 3 of temperature measurement is the discharge capacity C.
Alternatively, it may be performed before Step 5 or Step 8 for estimating the discharge duration Td.
【００１９】[0019]
【実施例】本発明および比較例の方法にしたがって、放
電持続時間を推定し、この推定放電持続時間と放電持続
時間の実測値とを比較することにより放電持続時間の推
定誤差を求めた。EXAMPLES The discharge duration was estimated according to the method of the present invention and the comparative example, and the estimated discharge duration was compared with the measured value of the discharge duration to obtain the discharge duration estimation error.
【００２０】本発明例
公称電圧１２Ｖ、１０時間率定格容量２Ａｈの制御弁式
鉛蓄電池を用いて発明の実施の形態で示した方法による
放電持続時間を推定した。なお、パルス放電として放電
時間１００ｍｓｅｃ、休止時間１００ｍｓｅｃのパルス
放電を４回行う。２回目、３回目および４回目のパルス
放電時の電池電圧（それぞれＶ２、Ｖ３およびＶ４）を
測定した。また、放電電流は電池の単位セルを構成する
正極板面積あたり３．０Ａ／ｄｍ2とした。Inventive Example A control valve type lead storage battery having a nominal voltage of 12 V and a rated capacity of 2 Ah for 10 hours was used to estimate the discharge duration by the method shown in the embodiment of the invention. As the pulse discharge, a pulse discharge having a discharge time of 100 msec and a rest time of 100 msec is performed four times. The battery voltage (V2, V3, and V4, respectively) during the second, third, and fourth pulse discharges was measured. In addition, the discharge current was 3.0 A / dm 2 per area of the positive electrode plate forming the unit cell of the battery.
【００２１】比較例
比較例の放電持続時間推定としては、１回目のパルス放
電時の電池電圧Ｖ１を測定し、このＶ１と二次電池自体
またはその二次電池の周囲の雰囲気の温度Ｔａとの関係
から放電持続時間を推定した。Comparative Example In order to estimate the discharge duration of the comparative example, the battery voltage V1 at the time of the first pulse discharge is measured, and this V1 is compared with the temperature Ta of the secondary battery itself or the atmosphere around the secondary battery. The discharge duration was estimated from the relationship.
【００２２】本発明例、比較例により放電持続時間を推
定した後、二次電池を実際に放電して放電持続時間を実
測し、この｛（推定値−実測値）÷（実測値）｝×１０
０（％）を推定誤差として算出した。なお、試験個数は
１０とした。After estimating the discharge duration according to the inventive example and the comparative example, the secondary battery was actually discharged to measure the discharge duration, and this {(estimated value-measured value) ÷ (measured value)} × 10
0 (%) was calculated as an estimation error. The number of tests was 10.
【００２３】これらの結果を図４に示す。The results are shown in FIG.
【００２４】図４に示す通り、本発明例によれば従来例
に比較して放電持続時間の推定誤差が著しく向上してい
ることがわかる。本発明例で比較すればパルス放電回数
３回目と４回目とではほぼ同一の推定誤差となるため、
パルス放電回数は多くとも３回で良いことがわかる。As shown in FIG. 4, according to the present invention example, the discharge duration estimation error is remarkably improved as compared with the conventional example. Comparing with the example of the present invention, since the same estimation error is obtained at the third and fourth pulse discharge times,
It can be seen that the number of pulse discharges is 3 at most.
【００２５】[0025]
【発明の効果】前記したように本発明によれば、二次電
池、特に制御弁式鉛蓄電池の放電容量および放電持続時
間の推定精度を向上できることから、工業上、極めて有
用である。As described above, according to the present invention, it is possible to improve the estimation accuracy of the discharge capacity and the discharge duration of the secondary battery, especially the control valve type lead storage battery, and it is industrially very useful.
【図１】本発明の実施の形態における放電容量と放電持
続時間の推定方法のフローを示す図FIG. 1 is a diagram showing a flow of a method for estimating a discharge capacity and a discharge duration according to an embodiment of the present invention.
【図２】本発明の実施の形態におけるパルス放電パター
ンを示す図FIG. 2 is a diagram showing a pulse discharge pattern in the embodiment of the present invention.
【図３】温度Ｔａ別の放電持続時間と２回目のパルス放
電時の放電電圧Ｖ２との関係を例示する図FIG. 3 is a diagram illustrating a relationship between a discharge duration for each temperature Ta and a discharge voltage V2 at the time of the second pulse discharge.
【図４】本発明例および比較例による放電持続時間推定
誤差を示す図FIG. 4 is a diagram showing a discharge duration estimation error according to an example of the present invention and a comparative example.
Claims (4)
電を行い、前記二次電池の放電電圧と放電時の二次電池
自体の温度または二次電池の周囲の雰囲気の温度を測定
し、別にあらかじめ求めた前記放電電圧および前記温度
と放電容量との関係に基づいて、前記二次電池の放電容
量を推定することを特徴とする二次電池の放電容量の推
定方法。1. A secondary battery is subjected to pulse discharge at least twice, and the discharge voltage of the secondary battery and the temperature of the secondary battery itself at the time of discharge or the temperature of the atmosphere around the secondary battery are measured, and separately. A method for estimating the discharge capacity of a secondary battery, comprising estimating the discharge capacity of the secondary battery based on a relationship between the discharge voltage and the temperature and the discharge capacity obtained in advance.
による放電容量の推定値とその二次電池のパルス放電後
の負荷電流の測定値とにより、別にあらかじめ求めた前
記放電容量および前記負荷電流と放電持続時間との関係
に基づいて、前記二次電池の放電持続時間を推定するこ
とを特徴とする二次電池の放電持続時間の推定方法。2. The discharge capacity and the load separately obtained in advance by the estimated value of the discharge capacity by the method for estimating the discharge capacity according to claim 1 and the measured value of the load current after pulse discharge of the secondary battery. A method for estimating the discharge duration of a secondary battery, comprising estimating the discharge duration of the secondary battery based on the relationship between the current and the discharge duration.
て、前記パルス電流は正極表面積に対して３Ａ／ｄｍ2
以上であり、パルス放電時間を５０ｍｓｅｃ以上とした
ことを特徴とする請求項１もしくは２に記載の二次電池
の放電容量と放電持続時間の推定方法。3. The secondary battery is a valve regulated lead-acid battery, and the pulse current is 3 A / dm 2 with respect to the positive electrode surface area.
The method for estimating the discharge capacity and the discharge duration of the secondary battery according to claim 1 or 2, wherein the pulse discharge time is 50 msec or more.
供給を指示するステップの後、前記パルス放電を行い、
その後負荷機器への負荷電流供給を行うことを特徴とす
る請求項１ないし３のいずれかに記載の二次電池の放電
容量と放電持続時間の推定方法。4. After the step of instructing the load current supply from the secondary battery to the load device, the pulse discharge is performed,
After that, the load current is supplied to the load device, and the method for estimating the discharge capacity and the discharge duration of the secondary battery according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001236033A JP2003045503A (en) | 2001-08-03 | 2001-08-03 | Method of estimating discharging capacity and discharging duration of secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001236033A JP2003045503A (en) | 2001-08-03 | 2001-08-03 | Method of estimating discharging capacity and discharging duration of secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003045503A true JP2003045503A (en) | 2003-02-14 |
Family
ID=19067376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001236033A Withdrawn JP2003045503A (en) | 2001-08-03 | 2001-08-03 | Method of estimating discharging capacity and discharging duration of secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003045503A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020150708A (en) * | 2019-03-14 | 2020-09-17 | ルネサスエレクトロニクス株式会社 | Semiconductor device and battery pack |
-
2001
- 2001-08-03 JP JP2001236033A patent/JP2003045503A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020150708A (en) * | 2019-03-14 | 2020-09-17 | ルネサスエレクトロニクス株式会社 | Semiconductor device and battery pack |
| JP7114514B2 (en) | 2019-03-14 | 2022-08-08 | ルネサスエレクトロニクス株式会社 | Semiconductor device and battery pack |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101187766B1 (en) | Apparatus and Method for cell balancing based on battery's voltage variation pattern | |
| KR101015185B1 (en) | State detecting system and device employing the same | |
| JP2771036B2 (en) | Method and apparatus for charging, defrosting and formatting a storage battery | |
| KR100262931B1 (en) | Charging device and charging system | |
| US5160880A (en) | Method and apparatus for charging and testing batteries | |
| JP6647111B2 (en) | Secondary battery deterioration estimating apparatus and secondary battery deterioration estimating method | |
| KR101402802B1 (en) | Apparatus and Method for cell balancing based on battery's voltage variation pattern | |
| US20040257041A1 (en) | Charging and discharging control apparatus for backup battery | |
| US11196271B2 (en) | Full-charge-capacity estimating device for power supply device | |
| US11635469B2 (en) | Power supply device | |
| US11923710B2 (en) | Battery management apparatus, battery management method and battery pack | |
| JPWO2018211824A1 (en) | Battery control device and vehicle system | |
| US20210270906A1 (en) | Battery management controllers capable of determining estimate of state of charge | |
| KR20140059135A (en) | Battery control ic and control method therefor | |
| JP2020153881A (en) | Rechargeable battery degradation estimation device, and rechargeable battery degradation estimation method | |
| JP2019211248A (en) | Secondary battery parameter estimating device, secondary battery parameter estimating method, and program | |
| JP2000270491A (en) | Lithium ion battery charging method and lithium ion battery charger | |
| JP2001526877A (en) | Battery and battery equalization method connected in series | |
| JP2000323182A (en) | Battery pack power source device | |
| JP3397187B2 (en) | Battery state of charge determination device | |
| US5646506A (en) | Method of charging a secondary battery and an apparatus therefor | |
| JP2003045503A (en) | Method of estimating discharging capacity and discharging duration of secondary battery | |
| JPH1189104A (en) | Charging method for lead battery | |
| JP2003068368A (en) | Method to estimate capacity of nickel-hydrogen cell | |
| JPH0980130A (en) | Storage battery capacity measurement method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080731 |
|
| RD01 | Notification of change of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7421 Effective date: 20080818 |
|
| RD01 | Notification of change of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7421 Effective date: 20091119 |
|
| A761 | Written withdrawal of application |
Free format text: JAPANESE INTERMEDIATE CODE: A761 Effective date: 20101126 |