JP7389199B1 - How to extend battery life - Google Patents
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- 238000000034 method Methods 0.000 claims abstract description 32
- 238000007599 discharging Methods 0.000 claims abstract description 30
- 230000004913 activation Effects 0.000 claims abstract description 7
- 238000010586 diagram Methods 0.000 abstract description 3
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
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- 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
【課題】各電池のフル充電時の電圧を下げ、高圧でフル充電状態にある時間を短縮できる、電池寿命延長方法を提供する。【解決手段】本発明の電池寿命延長方法は次のステップを含む。（１）直列接続した複数の電池からなる電池パックの充電が完了し、静置状態を確定すると、各電池の電圧値を検出する。（２）複数の電池における最高電圧値と最低電圧値の差を第１差分値とする。（３）複数の電池における各電池の電圧値と最低電圧値の差を第２差分値とする。（４）第１差分値が第１デフォルト電圧差分値より小さく、最低電圧値が放電起動電圧値より大きい時、最低電圧値が放電起動電圧値より小さくなるまで放電を行う。（５）第１差分値が第１デフォルト電圧差分値より大きく、最低電圧値がバランシング起動電圧値より大きい時、各第２差分値が第２デフォルト電圧差分値より小さくなるまで、又は最低電圧値がバランシング起動電圧値より小さくなるまでバランシングを行う。【選択図】図２An object of the present invention is to provide a battery life extension method that can lower the voltage of each battery when fully charged and shorten the time that each battery is in a fully charged state at high voltage. A method for extending battery life of the present invention includes the following steps. (1) When the charging of the battery pack consisting of a plurality of batteries connected in series is completed and the stationary state is determined, the voltage value of each battery is detected. (2) Let the difference between the highest voltage value and the lowest voltage value in the plurality of batteries be the first difference value. (3) The difference between the voltage value of each battery and the lowest voltage value in the plurality of batteries is set as a second difference value. (4) When the first difference value is smaller than the first default voltage difference value and the lowest voltage value is larger than the discharge starting voltage value, discharging is performed until the lowest voltage value becomes smaller than the discharge starting voltage value. (5) When the first difference value is larger than the first default voltage difference value and the lowest voltage value is larger than the balancing activation voltage value, until each second difference value becomes smaller than the second default voltage difference value, or the lowest voltage value Balancing is performed until the voltage becomes smaller than the balancing starting voltage value. [Selection diagram] Figure 2
Description
本願は電池分野に関し、特に、電池寿命延長方法に関する。 TECHNICAL FIELD This application relates to the battery field, and more particularly to a method for extending battery life.
ユーザーの異なる電力や電圧の使用ニーズに対応するため、複数の充電池を直列及び／又は並列方式により対応する電池パックを構成することができる。しかし、そのような電池パックを構成する各充電池はその製造工程において有する特性が異なり、例えば同じ温度下でも抵抗、電圧及び電気量に差があり、このような充電池が充放電を繰り返すとより明らかな差が生じ（すなわち相互にアンバランスである状態になり）、電池のアンバランスを解消せずに充放電を続けると、電圧の高い充電池に充電されて電圧が上がり過ぎ、安全上のリスクが生じるとともに電池パックの使用寿命が大幅に減少してしまう。また、充電端の変圧器の電圧が一定である場合、充電池がフルに充電された後、高温高圧のフル充電状態が長時間続くと、充電池の使用寿命が短くなってしまう。 In order to meet users' different power and voltage usage needs, a battery pack can be constructed that accommodates a plurality of rechargeable batteries in series and/or in parallel. However, each rechargeable battery that makes up such a battery pack has different characteristics due to the manufacturing process, such as differences in resistance, voltage, and amount of electricity even under the same temperature, and when such a rechargeable battery is repeatedly charged and discharged, If a more obvious difference occurs (in other words, the battery becomes unbalanced) and you continue charging and discharging the battery without correcting the imbalance, the high-voltage rechargeable battery will be charged and the voltage will rise too much, resulting in a safety hazard. In addition to this, the battery pack's service life will be significantly reduced. Further, when the voltage of the transformer at the charging end is constant, if the fully charged state of high temperature and high pressure continues for a long time after the rechargeable battery is fully charged, the service life of the rechargeable battery will be shortened.
本発明の主な目的は、既存技術の電池パックにおいて電池がアンバランスな状態、又は充電池が長時間高温高圧下でフル充電状態になることにより、電池パックの使用寿命が短くなるという問題を解決する、電池寿命延長方法を提供することである。 The main purpose of the present invention is to solve the problem of shortening the service life of battery packs in existing technology due to unbalanced batteries or rechargeable batteries being fully charged under high temperature and high pressure for a long time. The purpose of the present invention is to provide a method for extending battery life.
上述の目的を達成するため、本発明は次のように実施する。 To achieve the above object, the present invention is implemented as follows.
提供される電池寿命延長方法は次のステップを含む。複数の電池を直列接続して構成される電池パックの充電が完了し、かつ静置状態にあることを確定すると、複数の電池における各電池の電圧値を検出し続けるステップ。複数の電池における最高電圧値と最低電圧値の間の差分値を第１差分値とするステップ。複数の電池における各電池の電圧値と最低電圧値の間の差分値を第２差分値とするステップ。第１差分値が第１デフォルト電圧差分値より小さく、かつ最低電圧値が放電起動電圧値より大きいと判断された時に放電動作を実行し、最低電圧値が放電起動電圧値より小さくなったら放電動作を停止するステップ。第１差分値が第１デフォルト電圧差分値より大きく、かつ最低電圧値がバランシング起動電圧値より大きいと判断された時にバランシング動作を実行し、各第２差分値が第２デフォルト電圧差分値より小さくなった時、又は最低電圧値がバランシング起動電圧値より小さくなった時にバランシング動作を停止するステップ。ここでは、第２デフォルト電圧差分値は第１デフォルト電圧差分値より小さく、放電起動電圧値はバランシング起動電圧値より大きい。 The provided battery life extension method includes the following steps. When it is determined that the battery pack configured by connecting a plurality of batteries in series has been fully charged and is in a stationary state, the step of continuing to detect the voltage value of each battery in the plurality of batteries. A step of setting a difference value between the highest voltage value and the lowest voltage value in the plurality of batteries as a first difference value. A step of setting a difference value between the voltage value of each battery and the lowest voltage value in the plurality of batteries as a second difference value. When it is determined that the first difference value is smaller than the first default voltage difference value and the lowest voltage value is larger than the discharge starting voltage value, the discharging operation is executed, and when the lowest voltage value becomes smaller than the discharge starting voltage value, the discharging operation is performed. Step to stop. The balancing operation is performed when it is determined that the first difference value is larger than the first default voltage difference value and the lowest voltage value is larger than the balancing activation voltage value, and each second difference value is smaller than the second default voltage difference value. or when the lowest voltage value becomes smaller than the balancing start voltage value. Here, the second default voltage difference value is smaller than the first default voltage difference value, and the discharge starting voltage value is larger than the balancing starting voltage value.
提供されるもう一つの電池寿命延長方法は次のステップを含む。複数の電池を直列接続して構成される電池パックの充電が完了し、かつ静置状態になるたびに、複数の電池における各電池の電圧値を検出し続けるステップ。複数の電池における第１差分値が第１デフォルト電圧差分値より大きく、かつ最低電圧値がバランシング起動電圧値より大きいと判断された時にバランシング動作を実行し、複数の電池における各電池の第２差分値が第２デフォルト電圧差分値より小さくなった時、又は最低電圧値がバランシング起動電圧値より小さくなった時にバランシング動作を停止するステップ。第１差分値は複数の電池における最高電圧値と最低電圧値の間の差分値であり、各第２差分値は複数の電池における各電池の電圧値と最低電圧値の間の差分値であり、第２デフォルト電圧差分値は第１デフォルト電圧差分値より小さい。 Another battery life extension method provided includes the following steps. A step of continuously detecting the voltage value of each battery in the plurality of batteries each time a battery pack configured by connecting a plurality of batteries in series is completed and placed in a stationary state. When it is determined that the first difference value among the plurality of batteries is larger than the first default voltage difference value and the lowest voltage value is larger than the balancing starting voltage value, the balancing operation is performed, and the second difference value of each battery among the plurality of batteries is determined. stopping the balancing operation when the value becomes smaller than the second default voltage difference value or when the lowest voltage value becomes smaller than the balancing activation voltage value; The first difference value is a difference value between the highest voltage value and the lowest voltage value in the plurality of batteries, and each second difference value is the difference value between the voltage value and the lowest voltage value of each battery in the plurality of batteries. , the second default voltage difference value is smaller than the first default voltage difference value.
本発明の方法によれば、複数の電池を直列接続して構成される電池パックの充電が完了し、かつ静置状態になると、各電池の電圧値、第１デフォルト電圧差分値及び放電起動電圧値の対応関係に基づいて放電動作が行われることにより、又は各電池の電圧値、第１デフォルト電圧差分値、バランシング起動電圧値及び第２デフォルト電圧差分値の対応関係に基づいてバランシング動作が行われることにより、各電池のフル充電状態での電圧を下げ、高圧下でフル充電状態にある時間を短縮し、各電池の使用寿命を延長することができる。 According to the method of the present invention, when charging of a battery pack configured by connecting a plurality of batteries in series is completed and the battery pack is placed in a stationary state, the voltage value of each battery, the first default voltage difference value, and the discharge starting voltage are determined. The discharging operation is performed based on the correspondence between the values, or the balancing operation is performed based on the correspondence between the voltage value of each battery, the first default voltage difference value, the balancing starting voltage value, and the second default voltage difference value. By doing so, it is possible to lower the voltage of each battery in a fully charged state, shorten the time it is in a fully charged state under high pressure, and extend the service life of each battery.
本明細書における添付図面は、本発明をより理解するためのものであり、本発明の一部を構成する。本願の例示的実施形態及びその説明は、本発明を解釈するために用いられ、本発明を不当に限定するものではない。 The accompanying drawings herein are for a better understanding of the invention and constitute a part thereof. The illustrative embodiments of this application and their descriptions are used to interpret the invention and are not to be construed as unduly limiting the invention.
関連図面を合わせて本発明の実施形態について以下に説明する。 Embodiments of the present invention will be described below along with related drawings.
本明細書で使用される「含む」、「備える」等の語句は、特定の技術的特徴、数値、方法手順、動作プロセス及び／又は構成要素の存在を示すために用いられるが、さらなる技術的特徴、数値、方法手順、動作プロセス及び／若しくは構成要素、又はそれらの任意の組み合わせを追加する可能性を排除するものではないことを理解する必要がある。 As used herein, the words "comprising," "comprising," and the like are used to indicate the presence of a particular technical feature, value, method step, operating process, and/or component; It is to be understood that this does not exclude the possibility of adding features, values, method steps, operating processes and/or components, or any combination thereof.
また、ある構成要素が他の構成要素に「接続」又は「結合」すると表現されている場合、それは他の構成要素に直接接続又は結合されていてもよく、中間構成要素が存在してもよいことを理解する必要がある。逆に、ある構成要素が他の構成要素に「直接接続」又は「直接結合」していると表現される場合は、中間構成要素が存在しないことになる。 Also, when a component is expressed as being "connected" or "coupled" to another component, it may be directly connected or coupled to the other component, and there may be intermediate components. You need to understand that. Conversely, when a component is referred to as being "directly connected" or "directly coupled" to another component, there are no intermediate components present.
本発明の電池寿命延長方法を適用した電池装置が充電装置を用いて充電を行う実施形態を示す図である図１を参照されたい。本実施形態において、充電装置１００は電池装置２００に接続して充電電力を供給する。電池装置２００は電池パック２１０及び制御モジュール２２０を含む。電池パック２１０は複数の直列接続する電池モジュール３００を含み、各電池モジュール３００は電池３１０、バランス抵抗３２０及びスイッチ３３０を含み、各電池モジュール３００において電池３１０はスイッチ３３０を介してバランス抵抗３２０に並列接続する。制御モジュール２２０は、各電池３１０の電圧値を検出するとともに、各スイッチ３３０を適時オン又はオフにすることにより、放電動作又はバランシング動作を実行する。この電池パック２１０は、乗り物内部にあるような大型電気機械設備の高圧電源装置に活用でき、また、モバイル電子デバイスのような小型電子機器にも活用できる。各電池パック３１０はさまざまなタイプの充電池であってもよい。 Please refer to FIG. 1, which is a diagram showing an embodiment in which a battery device to which the battery life extension method of the present invention is applied is charged using a charging device. In this embodiment, the charging device 100 is connected to the battery device 200 to supply charging power. Battery device 200 includes a battery pack 210 and a control module 220. The battery pack 210 includes a plurality of battery modules 300 connected in series, each battery module 300 including a battery 310, a balance resistor 320, and a switch 330. In each battery module 300, the battery 310 is connected in parallel to the balance resistor 320 via the switch 330. Connecting. The control module 220 detects the voltage value of each battery 310 and performs a discharging operation or a balancing operation by turning each switch 330 on or off at the appropriate time. This battery pack 210 can be used as a high-voltage power supply for large electromechanical equipment such as inside a vehicle, and can also be used for small electronic equipment such as a mobile electronic device. Each battery pack 310 may be a variety of types of rechargeable batteries.
本実施形態において、電池パック２１０に含まれる電池モジュール３００の数量は３つであるが、本実施形態は本発明を限定するものではないので、この数量に限定されない。つまり、電池パック２１０に含まれる電池モジュール３００の数量は実際の必要に応じて調整を行うことができる。 In this embodiment, the number of battery modules 300 included in the battery pack 210 is three, but this embodiment does not limit the present invention, so the number is not limited to three. That is, the number of battery modules 300 included in the battery pack 210 can be adjusted according to actual needs.
図１と、図１の電池装置に適用される電池寿命延長方法の一実施形態におけるフローチャートである図２を参照されたい。本実施形態において、電池寿命延長方法は制御モジュール２２０により実行され、この電池寿命延長方法は次のステップを含む。まず、複数の電池３１０を直列接続して構成される電池パック２１０の充電が完了し、かつ静置状態にあることを確定すると、複数の電池３１０における各電池の電圧値を検出し続けるステップ４１０である。次に、複数の電池３１０における最高電圧値と最低電圧値の間の差分値を第１差分値とするステップ４２０である。次に、複数の電池３１０における各電池の電圧値と最低電圧値の間の差分値を第２差分値とするステップ４３０である。次に、第１差分値が第１デフォルト電圧差分値より小さく、かつ最低電圧値が放電起動電圧値より大きいと判断された時に放電動作を実行し、最低電圧値が放電起動電圧値より小さくなったら放電動作を停止するステップ４４０である。そして、第１差分値が第１デフォルト電圧差分値より大きく、かつ最低電圧値がバランシング起動電圧値より大きいと判断された時、バランシング動作を実行し、各第２差分値が第２デフォルト電圧差分値より小さくなった時、又は最低電圧値がバランシング起動電圧値より小さくなった時にバランシング動作を停止し、第２デフォルト電圧差分値は第１デフォルト電圧差分値より小さく、放電起動電圧値はバランシング起動電圧値より大きいステップ４５０である。 Please refer to FIG. 1 and FIG. 2, which is a flowchart of an embodiment of a battery life extension method applied to the battery device of FIG. 1. In this embodiment, the battery life extension method is performed by the control module 220 and includes the following steps. First, when it is determined that the battery pack 210 configured by connecting a plurality of batteries 310 in series has been fully charged and is in a stationary state, step 410 continues to detect the voltage value of each battery in the plurality of batteries 310. It is. Next is step 420 in which the difference value between the highest voltage value and the lowest voltage value in the plurality of batteries 310 is set as a first difference value. Next, step 430 is to set the difference value between the voltage value of each battery and the lowest voltage value in the plurality of batteries 310 as a second difference value. Next, when it is determined that the first difference value is smaller than the first default voltage difference value and the lowest voltage value is larger than the discharge starting voltage value, a discharging operation is executed, and the lowest voltage value becomes smaller than the discharge starting voltage value. Step 440 is to stop the discharge operation. Then, when it is determined that the first difference value is larger than the first default voltage difference value and the lowest voltage value is larger than the balancing activation voltage value, a balancing operation is performed, and each second difference value is set as the second default voltage difference value. Balancing operation is stopped when the voltage value becomes smaller than the value, or when the lowest voltage value becomes smaller than the balancing starting voltage value, the second default voltage difference value is smaller than the first default voltage difference value, and the discharge starting voltage value is less than the balancing starting voltage value. Step 450 is greater than the voltage value.
図１と、放電動作を行う各電池の充放電曲線の一例を示す図３を参照されたい。図３において、太線は図１中１個目の電池３１０（すなわち図１中最も左側の電池３１０）の充放電曲線であり、二点鎖線は図１中２個目の電池３１０（すなわち図１中で左から２個目の電池３１０）の充放電曲線であり、細線は図１中３個目の電池３１０（すなわち図１中最も右側の電池３１０）の充放電曲線であり、破線は図１中３個の電池３１０の異なる時点における平均電圧により構成された曲線である。本実施形態において、制御モジュール２２０は、続けて検出された各電池３１０の電圧値に基づいて、第１差分値が第１デフォルト電圧差分値より小さくかつ最低電圧値が放電起動電圧値より大きいと判断された時、すべてのスイッチ３３０をオンにし、放電動作を行い、各電池３１０はそのスイッチを介してバランス抵抗３２０に並列接続して放電を行い、３個の電池３１０における最低電圧値が放電起動電圧値より小さいと判断されるとすべてのスイッチ３３０をオフにし、それまで続いていた放電動作を停止する。ここでは、電池３１０はリチウム電池であり、第１デフォルト電圧差分値は７５ミリボルト（ｍＶ）であり、放電起動電圧値は４０７５ ｍＶであるが、種類及び数値はこれらに限定されない。第１デフォルト電圧差分値と放電起動電圧値の大きさは異なる電池の種類や実際のニーズに基づいて調整を行う。 Please refer to FIG. 1 and FIG. 3, which shows an example of the charging and discharging curve of each battery that performs a discharging operation. In FIG. 3, the thick line is the charge/discharge curve of the first battery 310 in FIG. 1 (i.e., the leftmost battery 310 in FIG. The thin line is the charge/discharge curve of the second battery 310 from the left in FIG. 1 (i.e., the rightmost battery 310 in FIG. This is a curve constructed from the average voltage of three out of three batteries 310 at different times. In this embodiment, the control module 220 determines that the first difference value is smaller than the first default voltage difference value and the lowest voltage value is larger than the discharge starting voltage value, based on the successively detected voltage values of each battery 310. When it is determined, all the switches 330 are turned on to perform a discharging operation, and each battery 310 is connected in parallel to the balance resistor 320 through the switch to discharge, and the lowest voltage value in the three batteries 310 is discharged. When it is determined that the voltage is lower than the starting voltage value, all the switches 330 are turned off and the discharging operation that has been continuing until then is stopped. Here, the battery 310 is a lithium battery, the first default voltage difference value is 75 millivolts (mV), and the discharge starting voltage value is 4075 mV, but the type and value are not limited thereto. The magnitudes of the first default voltage difference value and the discharge starting voltage value are adjusted based on different battery types and actual needs.
図１と、バランシング動作を行う各電池の充放電曲線の一例を示す図４を参照されたい。図４において、太線は図１中１個目の電池３１０（すなわち図１中最も左側の電池３１０）の充放電曲線であり、二点鎖線は図１中２個目の電池３１０（すなわち図１中で左から２個目の電池３１０）の充放電曲線であり、細線は図１中３個目の電池３１０（すなわち図１中最も右側の電池３１０）の充放電曲線であり、破線は図１中３個の電池３１０の異なる時点における平均電圧により構成された曲線である。本実施形態において、制御モジュール２２０は、検出し続けられた各電池３１０の電圧値に基づいて、第１差分値が第１デフォルト電圧差分値より大きくかつ最低電圧値がバランシング起動電圧値より大きいと判断された時、バランシング動作を行い、各電池３１０の第２差分値が第２デフォルト電圧差分値より小さい、又は最低電圧値がバランシング起動電圧値より小さいと判断されると、それまで続いていたバランシング動作を停止する。ここでは、第２差分値は第１デフォルト電圧差分値より小さく、放電起動電圧値はバランシング起動電圧値より大きい。第２デフォルト電圧差分値は５０ｍＶであり、バランシング起動電圧値は３９２５ ｍＶであるが、数値はこれらに限定されない。第２デフォルト電圧差分値とバランシング起動電圧値の大きさは異なる電池の種類や実際のニーズに基づいて調整を行う。 Please refer to FIG. 1 and FIG. 4 which shows an example of the charge/discharge curve of each battery that performs a balancing operation. In FIG. 4, the thick line is the charge/discharge curve of the first battery 310 in FIG. 1 (i.e., the leftmost battery 310 in FIG. The thin line is the charge/discharge curve of the second battery 310 from the left in FIG. 1 (i.e., the rightmost battery 310 in FIG. This is a curve constructed from the average voltage of three out of three batteries 310 at different times. In this embodiment, the control module 220 determines that the first difference value is larger than the first default voltage difference value and the lowest voltage value is larger than the balancing starting voltage value, based on the continuously detected voltage values of each battery 310. When it is determined, a balancing operation is performed, and if it is determined that the second difference value of each battery 310 is smaller than the second default voltage difference value or that the lowest voltage value is smaller than the balancing starting voltage value, the balancing operation continues until then. Stop balancing operation. Here, the second difference value is smaller than the first default voltage difference value, and the discharge starting voltage value is larger than the balancing starting voltage value. The second default voltage difference value is 50 mV, and the balancing activation voltage value is 3925 mV, but the values are not limited thereto. The magnitudes of the second default voltage difference value and the balancing start-up voltage value are adjusted based on different battery types and actual needs.
さらに詳しく説明すると、このバランシング動作の実行は次のステップを含んでいる。まず、第２差分値が第１デフォルト電圧差分値より大きいすべての電池３１０が並列接続するスイッチ３３０をオンにし、これら複数の電池３１０はそれぞれ並列接続するバランス抵抗３２０を介して放電を行い、各第２差分値が第２デフォルト電圧差分値より小さいか否かを判断し続けるステップである。そして、複数の電池３１０のうちいずれか１つの第２差分値が第２デフォルト電圧差分値より小さい時、その電池３１０が並列接続するスイッチ３３０をオフにするステップである。 More specifically, performing this balancing operation includes the following steps. First, the switch 330 to which all the batteries 310 whose second difference value is larger than the first default voltage difference value is connected in parallel is turned on, and each of these batteries 310 is discharged through the balance resistor 320 which is connected in parallel. This step continues to determine whether the second difference value is smaller than the second default voltage difference value. Then, when the second difference value of any one of the plurality of batteries 310 is smaller than the second default voltage difference value, the switch 330 to which the battery 310 is connected in parallel is turned off.
つまり、制御モジュール２２０がバランシング動作を行う際は、一部／全部のスイッチ３３０をオンにできる。制御モジュール２２０が、各第２差分値が第２デフォルト電圧差分値より小さい、又は最低電圧値がバランシング起動電圧値より小さいと判断した時、オンになっていたスイッチ３３０をオフにし、バランシング動作を停止する。 That is, when the control module 220 performs a balancing operation, some/all of the switches 330 can be turned on. When the control module 220 determines that each second difference value is smaller than the second default voltage difference value or that the lowest voltage value is smaller than the balancing starting voltage value, it turns off the switch 330 that was on and performs the balancing operation. Stop.
また、本実施形態において、電池寿命延長方法は次のステップを含むこともできる。まず、放電動作又はバランシング動作を行う過程において、電池パック２１０が充放電を行うと判断されると、放電動作又はバランシング動作を停止するステップである。言い換えると、制御モジュール２２０が放電動作又はバランシング動作を行う過程において、電池パック２１０が充放電を行うと判断されると、すべてのスイッチ３３０をオフにし、放電動作又はバランシング動作を停止する。本発明において、電池パック２１０が放電を行うということは、電池パック２１０が外部負荷に電力を供給することである。この放電動作は制御モジュール２２０がスイッチ３３０をオンにすると、電池パック２１０の電池３１０が並列接続するバランス抵抗３２０を介して放電を行う（すなわちバランス抵抗３２０を介して電気エネルギーを放出）ことであり、これによりフル充電時の電圧が下がるようになる。このバランシング動作は、制御モジュール２２０がスイッチ３３０をオンにすると、電池パック２１０の電池３１０が並列接続するバランス抵抗３２０を介して放電を行う（すなわちバランス抵抗３２０を介して電気エネルギーを放出する）ことであり、これにより電池パック２１０のすべての電池３１０の間の電圧のバランスが取れるようになる。 Moreover, in this embodiment, the battery life extension method may also include the following steps. First, in the process of performing a discharging operation or a balancing operation, if it is determined that the battery pack 210 will perform charging or discharging, this is a step of stopping the discharging operation or the balancing operation. In other words, when the control module 220 determines that the battery pack 210 is to be charged or discharged while performing the discharging operation or the balancing operation, all the switches 330 are turned off and the discharging operation or the balancing operation is stopped. In the present invention, the battery pack 210 discharging means that the battery pack 210 supplies power to an external load. In this discharging operation, when the control module 220 turns on the switch 330, the batteries 310 of the battery pack 210 discharge through the balance resistor 320 connected in parallel (that is, release electrical energy through the balance resistor 320). , this will lower the voltage when fully charged. This balancing operation is such that when the control module 220 turns on the switch 330, the batteries 310 of the battery pack 210 discharge through the balance resistor 320 connected in parallel (that is, release electrical energy through the balance resistor 320). This allows the voltages among all the batteries 310 of the battery pack 210 to be balanced.
一実施形態では、複数の電池３１０を直列接続して構成される電池パック２１０の充電が完了し、かつ静置状態にあることを確定するステップ４１０は、電池パック２１０の総電圧値又は平均電圧値が判定電圧値より大きい状態の維持時間が判定時間より長い時、電池パック２１０が充電を完了し、かつ前述の静置状態にあることを確定することを含む。ここでは、電池パック２１０の平均電圧値は電池パック２１０のすべての電池３１０の平均電圧値であり、前述の判定電圧値と判定時間は必要に応じて調整可能である。 In one embodiment, the step 410 of determining that the battery pack 210 configured by connecting a plurality of batteries 310 in series is completed and in a stationary state includes the total voltage value or the average voltage of the battery pack 210. This includes determining that the battery pack 210 has completed charging and is in the above-mentioned stationary state when the time period in which the value is greater than the determination voltage value is longer than the determination time. Here, the average voltage value of the battery pack 210 is the average voltage value of all the batteries 310 in the battery pack 210, and the aforementioned determination voltage value and determination time can be adjusted as necessary.
一実施形態では、上述した図２の電池寿命延長方法を用いた電池装置２００を無停電電源装置（ＵＰＳ：ｕｎｉｎｔｅｒｒｕｐｔｉｂｌｅ ｐｏｗｅｒ ｓｕｐｐｌｙ）に設置することができる。電池パック２１０はフルに充電された後、放電動作により、電池３１０が長時間高温高圧下でフル充電状態になることはない。あるいは、バランシング動作により、複数の電池３１０の間にアンバランスが生じる問題が起こらない。したがって、電池パック２１０の使用寿命を延長でき、さらには前述のＵＰＳのメンテナンスコストが抑えられる。 In one embodiment, the battery device 200 using the battery life extension method of FIG. 2 described above can be installed in an uninterruptible power supply (UPS). After the battery pack 210 is fully charged, due to the discharging operation, the battery 310 will not be in a fully charged state under high temperature and high pressure for a long time. Alternatively, due to the balancing operation, the problem of imbalance between the plurality of batteries 310 does not occur. Therefore, the service life of the battery pack 210 can be extended, and furthermore, the maintenance cost of the above-mentioned UPS can be suppressed.
図１と、図１の電池装置に適用される電池寿命延長方法の別の実施形態におけるフローチャートである図５を参照されたい。本実施形態において、電池寿命延長方法は制御モジュール２２０によって実行され、この電池寿命延長方法は次のステップを含む。まず、複数の電池３１０を直列接続して構成される電池パック２１０の充電が完了し、かつ静置状態になるたびに、複数の電池３１０における各電池の電圧値を検出し続けるステップ５１０である。そして、複数の電池３１０における第１差分値が第１デフォルト電圧差分値より大きく、かつ最低電圧値がバランシング起動電圧値より大きいと判断された時にバランシング動作を実行し、複数の電池３１０における各電池の第２差分値が第２デフォルト電圧差分値より小さくなった時、又は最低電圧値がバランシング起動電圧値より小さくなった時にバランシング動作を停止するステップ５２０である。ここでは、複数の電池３１０における最高電圧値と最低電圧値の間の差分値が第１差分値となり、複数の電池３１０における各電池の電圧値と最低電圧値の間の差分値が各第２差分値となり、第２デフォルト電圧差分値は第１デフォルト電圧差分値より小さい。 Please refer to FIG. 1 and FIG. 5, which is a flowchart of another embodiment of the battery life extension method applied to the battery device of FIG. 1. In this embodiment, the battery life extension method is performed by the control module 220 and includes the following steps. First, step 510 is to continue detecting the voltage value of each battery in the plurality of batteries 310 each time the battery pack 210 configured by connecting a plurality of batteries 310 in series is completed and the battery pack 210 is placed in a stationary state. . Then, when it is determined that the first difference value in the plurality of batteries 310 is larger than the first default voltage difference value and the lowest voltage value is larger than the balancing starting voltage value, the balancing operation is executed, and each battery in the plurality of batteries 310 is Step 520 of stopping the balancing operation when the second difference value becomes smaller than the second default voltage difference value or when the lowest voltage value becomes smaller than the balancing activation voltage value. Here, the difference value between the highest voltage value and the lowest voltage value in the plurality of batteries 310 is the first difference value, and the difference value between the voltage value and the lowest voltage value of each battery in the plurality of batteries 310 is the second difference value. The second default voltage difference value is smaller than the first default voltage difference value.
上述のステップによれば、電池パック２１０の充電が完了して前述の静置状態になるたびに、電池パック２１０の複数の電池３１０はバランシング動作を行うので、充放電を繰り返した後でも電池パック２１０の複数の電池３１０はバランスが取れた状態を保つことができ、電池パック２１０の使用寿命が延長される。 According to the above-described steps, each time the battery pack 210 is fully charged and enters the above-mentioned stationary state, the plurality of batteries 310 of the battery pack 210 performs a balancing operation, so that the battery pack remains stable even after repeated charging and discharging. The plurality of batteries 310 of 210 can be kept in a balanced state, extending the service life of the battery pack 210.
一実施形態では、前述の電池寿命延長方法は次のステップを含む。バランシング動作を行う過程において、電池パック２１０が充放電を行うと判断されると、そのバランシング動作を停止するステップである。言い換えると、制御モジュール２２０がバランシング動作を行う過程において、電池パック２１０が充電又は放電を行うと判断されると、すべてのスイッチ３３０をオフにし、バランシング動作を停止する。 In one embodiment, the aforementioned battery life extension method includes the following steps. In the process of performing the balancing operation, if it is determined that the battery pack 210 will perform charging and discharging, this is a step of stopping the balancing operation. In other words, when the control module 220 determines that the battery pack 210 is to be charged or discharged during the balancing operation, all the switches 330 are turned off and the balancing operation is stopped.
一実施形態では、前述のバランシング動作の実行は次のステップを含む。まず、前述の第２差分値が第１デフォルト電圧差分値より大きいすべての電池３１０が並列接続するスイッチ３３０をオンにし、これら複数の電池３１０はそれぞれ並列接続する前述バランス抵抗３２０を介して放電を行い、続けて各第２差分値が第２デフォルト電圧差分値より小さいか否かを判断するステップである。そして、複数の電池３１０のうちいずれか１つの第２差分値が第２デフォルト電圧差分値小さい時、その電池３１０が並列接続するスイッチ３３０をオフにするステップである。詳細は上述の段落で説明したので、ここでは再述しない。 In one embodiment, performing the aforementioned balancing operation includes the following steps. First, the switch 330 to which all the batteries 310 whose second difference value is larger than the first default voltage difference value is connected in parallel is turned on, and each of these batteries 310 is discharged through the balance resistor 320 which is connected in parallel. and then determining whether each second difference value is smaller than a second default voltage difference value. Then, when the second difference value of any one of the plurality of batteries 310 is smaller than the second default voltage difference value, the switch 330 to which that battery 310 is connected in parallel is turned off. The details have been explained in the above paragraph and will not be repeated here.
一実施形態では、複数の電池３１０を直列接続して構成される電池パック２１０の充電が完了するということは、電池パック２１０の総電圧値又は平均電圧値が判定電圧値より大きいということである。この判定電圧値は必要に応じて調整可能である。 In one embodiment, completion of charging of the battery pack 210 configured by connecting a plurality of batteries 310 in series means that the total voltage value or average voltage value of the battery pack 210 is greater than the determination voltage value. . This determination voltage value can be adjusted as necessary.
上述の内容をまとめると、本発明の実施形態における電池寿命延長方法によれば、複数の電池を直列接続して構成される電池パックの充電が完了し、かつ静置状態になると、各電池の電圧値、第１デフォルト電圧差分値、放電起動電圧値及び／又はバランシング起動電圧値、第２デフォルト電圧差分値の対応関係に基づいて放電及び／又はバランシング動作が行われることにより、電池パックにおける各電池のフル充電状態での電圧を下げ、高圧下でフル充電状態にある時間を短縮し、電池の使用寿命を延長することができる。 To summarize the above-mentioned contents, according to the battery life extension method according to the embodiment of the present invention, when a battery pack consisting of a plurality of batteries connected in series is fully charged and is placed in a stationary state, each battery By performing the discharging and/or balancing operation based on the correspondence between the voltage value, the first default voltage difference value, the discharge starting voltage value and/or the balancing starting voltage value, and the second default voltage difference value, each It can lower the voltage when the battery is fully charged, shorten the time it is fully charged under high pressure, and extend the battery's service life.
本願の図面には上述した構成要素が含まれているが、本発明の精神に反することがなければ、より優れた技術的成果を得るために、より多くのその他の追加的な構成要素を使用することも可能である。 Although the drawings of the present application include the above-mentioned components, more other additional components may be used to obtain better technical results without departing from the spirit of the invention. It is also possible to do so.
以上、実施形態を例示して本発明を説明したが、これらの記載は本発明を限定するものではないことに留意されたい。 むしろ、本発明は、当業者にとって自明な変更および類似の設定を含む。 したがって、特許請求の範囲は、すべての自明な変更及び類似の設定を含むように最も広く解釈される必要がある。 Although the present invention has been described above by way of example embodiments, it should be noted that these descriptions do not limit the present invention. On the contrary, the invention includes modifications and similar arrangements that are obvious to those skilled in the art. Therefore, the claims should be interpreted in the broadest manner to include all obvious modifications and similar arrangements.
１００ 充電装置
２００ 電池装置
２１０ 電池パック
２２０ 制御モジュール
３００ 電池モジュール
３１０ 電池
３２０ バランス抵抗
３３０ スイッチ
100 Charging device 200 Battery device 210 Battery pack 220 Control module 300 Battery module 310 Battery 320 Balance resistor 330 Switch
Claims (9)
前記複数の電池における最高電圧値と最低電圧値の間の差分値を第１差分値とするステップと、
前記複数の電池における各電池の電圧値と前記最低電圧値の間の差分値を第２差分値とするステップと、
前記第１差分値が第１デフォルト電圧差分値より小さく、かつ前記最低電圧値が放電起動電圧値より大きいと判断された時、放電動作を実行し、前記最低電圧値が前記放電起動電圧値より小さくなったら前記放電動作を停止するステップと、
前記第１差分値が前記第１デフォルト電圧差分値より大きく、かつ前記最低電圧値がバランシング起動電圧値より大きいと判断された時、バランシング動作を実行し、各前記第２差分値が第２デフォルト電圧差分値より小さくなった時、又は前記最低電圧値が前記バランシング起動電圧値より小さくなった時に前記バランシング動作を停止するステップを含み、前記第２デフォルト電圧差分値は前記第１デフォルト電圧差分値より小さく、前記放電起動電圧値は前記バランシング起動電圧値より大きい、電池寿命延長方法。 When it is determined that a battery pack configured by connecting a plurality of batteries in series has been fully charged and is in a stationary state, continuing to detect the voltage value of each battery in the plurality of batteries;
setting a difference value between the highest voltage value and the lowest voltage value in the plurality of batteries as a first difference value;
setting a difference value between the voltage value of each battery in the plurality of batteries and the lowest voltage value as a second difference value;
When it is determined that the first difference value is smaller than the first default voltage difference value and the lowest voltage value is larger than the discharge starting voltage value, a discharging operation is performed, and the lowest voltage value is lower than the discharge starting voltage value. stopping the discharge operation when the discharge becomes smaller;
When it is determined that the first difference value is larger than the first default voltage difference value and the lowest voltage value is larger than the balancing starting voltage value, a balancing operation is performed, and each of the second difference values is set as a second default voltage difference value. stopping the balancing operation when the voltage difference value becomes smaller than the voltage difference value, or when the lowest voltage value becomes smaller than the balancing starting voltage value, and the second default voltage difference value is the first default voltage difference value. and the discharge starting voltage value is greater than the balancing starting voltage value.
前記電池パックの総電圧値又は平均電圧値が判定電圧値より大きい状態の維持時間が判定時間より長い時、前記電池パックが充電を完了し、かつ前記静置状態にあることを確定することを含む、請求項１に記載の電池寿命延長方法。 The step of determining that the battery pack configured by connecting the plurality of batteries in series has been fully charged and is in a stationary state,
When the time during which the total voltage value or average voltage value of the battery pack is greater than the determination voltage value is longer than the determination time, it is determined that the battery pack has completed charging and is in the stationary state. The battery life extension method according to claim 1, comprising:
すべての前記スイッチをオンにすることで、前記複数の電池がそのスイッチを介して前記バランス抵抗に並列接続して放電が実行されることを含む、請求項１に記載の電池寿命延長方法。 Each battery in the plurality of batteries is connected in parallel to a balance resistor via a switch, and the discharging operation is performed by:
2. The method of extending battery life according to claim 1, comprising: turning on all of the switches to connect the plurality of batteries in parallel to the balance resistor via the switches to perform discharging.
前記第２差分値が前記第１デフォルト電圧差分値より大きいすべての電池が並列接続する前記スイッチをオンにすることで、前記複数の電池がそれぞれ並列接続する前記バランス抵抗を介して放電が行われ、各前記第２差分値が前記第２デフォルト電圧差分値より小さいか否かを判断し続けることと、
前記複数の電池におけるいずれか１個の電池の前記第２差分値が前記第２デフォルト電圧差分値より小さい時、前記電池が並列接続する前記スイッチをオフにすることを含む、請求項１に記載の電池寿命延長方法。 Each battery in the plurality of batteries is connected in parallel to a balancing resistor via a switch, and performing the balancing operation includes:
By turning on the switch to which all the batteries having the second difference value larger than the first default voltage difference value are connected in parallel, the plurality of batteries are discharged through the balance resistor connected in parallel. , continuing to determine whether each second difference value is smaller than the second default voltage difference value;
2. The method of claim 1, further comprising: turning off the switch to which the batteries are connected in parallel when the second difference value of any one battery in the plurality of batteries is smaller than the second default voltage difference value. How to extend battery life.
前記複数の電池における第１差分値が第１デフォルト電圧差分値より大きく、かつ最低電圧値がバランシング起動電圧値より大きいと判断された時にバランシング動作を実行し、前記複数の電池における各電池の第２差分値が第２デフォルト電圧差分値より小さくなった時、又は前記最低電圧値が前記バランシング起動電圧値より小さくなった時に前記バランシング動作を停止するステップを含み、前記第１差分値は前記複数の電池における最高電圧値と前記最低電圧値の間の差分値であり、各前記第２差分値は前記複数の電池における各電池の電圧値と前記最低電圧値の間の差分値であり、前記第２デフォルト電圧差分値は前記第１デフォルト電圧差分値より小さい、電池寿命延長方法。 Continuing to detect the voltage value of each battery in the plurality of batteries each time a battery pack configured by connecting a plurality of batteries in series is completed and placed in a stationary state;
A balancing operation is performed when it is determined that the first difference value in the plurality of batteries is larger than the first default voltage difference value and the lowest voltage value is larger than the balancing starting voltage value, and the first difference value of each battery in the plurality of batteries is stopping the balancing operation when the two difference values become smaller than a second default voltage difference value, or when the lowest voltage value becomes smaller than the balancing activation voltage value, the first difference value being smaller than the plurality of default voltage difference values; a difference value between the highest voltage value and the lowest voltage value in the batteries, each second difference value being a difference value between the voltage value of each battery in the plurality of batteries and the lowest voltage value, and The second default voltage difference value is smaller than the first default voltage difference value.
前記第２差分値が前記第１デフォルト電圧差分値より大きいすべての電池が並列接続する前記スイッチをオンにすることで、前記複数の電池がそれぞれ並列接続する前記バランス抵抗を介して放電が行われ、各前記第２差分値が前記第２デフォルト電圧差分値より小さいか否かを判断し続けることと、
前記複数の電池におけるいずれか１個の電池の前記第２差分値が前記第２デフォルト電圧差分値より小さい時、前記電池が並列接続する前記スイッチをオフにすることを含む、請求項６に記載の電池寿命延長方法。 Each battery in the plurality of batteries is connected in parallel to a balancing resistor via a switch, and performing the balancing operation includes:
By turning on the switch to which all the batteries having the second difference value larger than the first default voltage difference value are connected in parallel, the plurality of batteries are discharged through the balance resistor connected in parallel. , continuing to determine whether each second difference value is smaller than the second default voltage difference value;
7. The method of claim 6, further comprising turning off the switch to which the batteries are connected in parallel when the second difference value of any one battery in the plurality of batteries is smaller than the second default voltage difference value. How to extend battery life.
According to claim 6, the completion of charging of the battery pack configured by connecting the plurality of batteries in series means that the total voltage value or average voltage value of the battery pack has become larger than the determination voltage value. How to extend battery life as described.
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