JP2022150521A - Hybrid battery pack - Google Patents
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- JP2022150521A JP2022150521A JP2021053159A JP2021053159A JP2022150521A JP 2022150521 A JP2022150521 A JP 2022150521A JP 2021053159 A JP2021053159 A JP 2021053159A JP 2021053159 A JP2021053159 A JP 2021053159A JP 2022150521 A JP2022150521 A JP 2022150521A
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- heater
- secondary batteries
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- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 239000007773 negative electrode material Substances 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000010439 graphite Substances 0.000 claims abstract description 6
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 6
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 2
- 239000003063 flame retardant Substances 0.000 claims description 2
- 235000011837 pasties Nutrition 0.000 claims description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 14
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 14
- 238000012423 maintenance Methods 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 2
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 2
- 150000002642 lithium compounds Chemical class 0.000 description 2
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 2
- 239000011255 nonaqueous electrolyte Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- -1 graphite (graphite Chemical class 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910021384 soft carbon Inorganic materials 0.000 description 1
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Abstract
Description
本発明は、異なる電池種を組合わせたハイブリッド型のリチウムイオン二次電池の組電池に関する。 The present invention relates to an assembled battery of hybrid lithium-ion secondary batteries in which different types of batteries are combined.
近年、再生可能エネルギーの普及に伴い、発電システムの開発に加え、再生可能エネルギーの余剰電力を蓄えるための蓄電システムの開発も進んできている。蓄電システムの設置される場所としては屋外などが想定され、自然環境の影響を受けることが想定されている。 In recent years, with the spread of renewable energy, in addition to the development of power generation systems, the development of power storage systems for storing surplus power generated by renewable energy has also progressed. Outdoors etc. are assumed as a place where an electrical storage system is installed, and it is assumed that it will be affected by the natural environment.
一般的に、蓄電システムに使用されているリチウムイオン二次電池は、負極に黒鉛系材料を使用しているため、低温環境下での充放電特性に劣る性質がある。その為、低温環境下では、充放電反応の速度が遅くなり性能を十分に発揮できない、或いは、使用するためにリチウムイオン二次電池自体の温度が低くならない様に断熱材やヒーターなどを設ける対策を講じる必要がある（例えば、特許文献１参照）。
Lithium-ion secondary batteries used in power storage systems generally have poor charging/discharging characteristics in low-temperature environments because they use a graphite-based material for the negative electrode. Therefore, in a low-temperature environment, the rate of charge-discharge reaction slows down and performance cannot be fully demonstrated, or countermeasures are taken to install heat insulators and heaters so that the temperature of the lithium-ion secondary battery itself does not drop due to use. (see
一方、負極にチタン酸リチウム（ＬＴＯ）を使用しているＬＴＯ電池は、リチウムイオン二次電池に比べて低温環境下での充放電特性が劣らないという性質がある。 On the other hand, an LTO battery using lithium titanate (LTO) as a negative electrode has the property that charge/discharge characteristics in a low temperature environment are not inferior to those of a lithium ion secondary battery.
ところで、近年の再生可能エネルギーの普及に伴って、高容量型電池、例えばリチウムイオン二次電池と、高出力型電池、例えばＬＴＯ電池とが、電気的に並列接続されたハイブリッド型の組電池が提案されている。 By the way, with the recent spread of renewable energy, a hybrid assembled battery in which a high-capacity battery such as a lithium-ion secondary battery and a high-power battery such as an LTO battery are electrically connected in parallel has become popular. Proposed.
この構成によれば、低温環境下で高容量電池であるリチウムイオン二次電池により十分に大きなエネルギー容量を確保するために、低温環境下での充放電特性に優れるＬＴＯ電池によりヒーターを駆動させて、そのヒーターの熱でリチウムイオン二次電池を温める構成の組電池が従来から知られている。（特許文献２参照）。 According to this configuration, the heater is driven by the LTO battery, which has excellent charge/discharge characteristics in a low-temperature environment, in order to ensure a sufficiently large energy capacity by using a lithium-ion secondary battery, which is a high-capacity battery, in a low-temperature environment. , an assembled battery having a configuration in which the heat of the heater warms the lithium ion secondary battery has been conventionally known. (See Patent Document 2).
しかしながら、上記の従来技術においては、ヒーター等の加熱部材が存在することで、ヒーター等の加熱部材と、ヒーター等の加熱部材を固定するための部材やヒーター等の加熱部材のＯＮ－ＯＦＦや温度制御を行うための別途の専用制御が必要であり、ヒーター等の加熱部材を駆動させるための負荷電力も必要になってしまう。また、上記従来技術では、電池群をメンテナンス等で取り換える際はヒーター等の加熱部材が取り付けられた電池群ごと取り外しを行わないといけない等の課題が発生した。 However, in the above-described prior art, due to the presence of a heating member such as a heater, a heating member such as a heater, a member for fixing the heating member such as a heater, and a heating member such as a heater can be turned on and off and the temperature can be changed. Separate dedicated control is required for control, and load power is also required for driving a heating member such as a heater. In addition, in the above conventional technology, when replacing the battery group for maintenance or the like, there is a problem that the entire battery group to which a heating member such as a heater is attached must be removed.
そこで、本発明は、低温環境下でリチウムイオン二次電池の充放電を行う際、ヒーター等の加熱部材を別途取り付けることなく、ＬＴＯ電池を大電流値で充放電させた時に発生する熱をリチウムイオン二次電池側に伝熱させ、リチウムイオン二次電池を温めることができる構成の組電池の構成することで、上記課題を解決できることを見出した。すなわち、本発明は［１］負極材料にチタン酸リチウムを使用した第一の二次電池と、負極材料に黒鉛を使用した第二の二次電池とを備え、ヒーター等の加熱部材を備えることなく、第一の二次電池の熱を第二の二次電池に伝熱するように第一の二次電池が第二の二次電池を挟み込むように構成された組電池である。 In view of this, the present invention provides a solution for charging/discharging a lithium-ion secondary battery in a low-temperature environment, in which the heat generated when the LTO battery is charged/discharged at a high current value is removed without separately attaching a heating member such as a heater. The present inventors have found that the above problem can be solved by constructing an assembled battery having a structure in which heat can be transferred to the ion secondary battery and the lithium ion secondary battery can be warmed. That is, the present invention provides [1] a first secondary battery using lithium titanate as a negative electrode material and a second secondary battery using graphite as a negative electrode material, and a heating member such as a heater. Instead, it is an assembled battery configured such that the first secondary battery sandwiches the second secondary battery so that the heat of the first secondary battery is transferred to the second secondary battery.
上記構成とすることで、ヒーター等の加熱部材が不要となり、それら部材の短絡故障や過温度から、組電池を保護するためのサーモスタット等の制御素子（保護素子）を配設する必要がないため、組電池を複数個組合わせたシステムの構成が簡易であり、組電池の交換などのメンテナンスでも有用であるとともに、ヒーター等の加熱部材を加熱するための電力を電池群より供給する必要もなく、電池群に充電した電力を効率的に使用することが出来る。 The above configuration eliminates the need for heating members such as heaters, and eliminates the need to install control elements (protective elements) such as thermostats to protect the assembled battery from short-circuit failures and overheating of these members. , the structure of a system that combines a plurality of assembled batteries is simple, and it is useful for maintenance such as replacement of assembled batteries, and there is no need to supply electric power for heating heating members such as heaters from the battery group. , the power charged in the battery group can be used efficiently.
また、[２]第一の二次電池と第二の二次電池は、樹脂製及び／又は金属製、或いは、樹脂と金属を組合わせたケースで固定された組電池とすることが好ましい。さらに、[３]温度測定素子が第一の二次電池表面及び／又は第二の二次電池表面に備えられているようにしてもよい。 [2] The first secondary battery and the second secondary battery are preferably assembled batteries fixed in a case made of resin and/or metal, or a combination of resin and metal. Furthermore, [3] the temperature measuring element may be provided on the surface of the first secondary battery and/or the surface of the second secondary battery.
本発明においては、[４]前記組電池は最小単位の二次電池の組み合わせで構成され、第一の二次電池同士を接続する場合は直列接続されているようにしてもよいし、[５]第一の二次電池と第二の二次電池の接触面にはペースト状で難燃性の特性も有した伝熱材料が備えれれているようにしてもよいし、[６]第一の二次電池、第二の二次電池における充電と放電は、各々独立して充電又は放電されるシステム構成であってもよい。 In the present invention, [4] the assembled battery is composed of a combination of secondary batteries of the smallest unit, and when the first secondary batteries are connected to each other, they may be connected in series, [5] ] The contact surface of the first secondary battery and the second secondary battery may be provided with a pasty heat transfer material that also has flame retardant properties, and [6] the first The charging and discharging of the second secondary battery and the second secondary battery may be independently charged or discharged.
本発明の構成により、第一の二次電池の熱を、第二の二次電池にヒーター等の別途の加熱部材を設けることなく伝熱することができ、低温環境下でも第二の二次電池が温められることにより充放電を行うことが可能である。また、ヒーター等の加熱部材を有さないため、省スペースが達成できるとともに、組電池を複数個使用するシステムにおいて、複数個の内、いずれかの組電池の交換する必要性が生じたときにおいても、ヒーター等の加熱部材の取り外しを行うことなく、組電池のみの交換ができ、保守メンテナンスでも有用である。 With the configuration of the present invention, the heat of the first secondary battery can be transferred to the second secondary battery without providing a separate heating member such as a heater, and the second secondary battery can be heated even in a low temperature environment. Charging and discharging can be performed by warming the battery. In addition, since it does not have a heating member such as a heater, space can be saved. Also, the assembled battery can be replaced without removing a heating member such as a heater, which is useful in maintenance.
本発明の一実施形態について以下に説明するが、本発明はこれらに限定されるものではない。本発明に使用する図面は実施形態の一例を示したものであり、本発明の実施形態を限定するものではない。 One embodiment of the present invention will be described below, but the present invention is not limited thereto. The drawings used in the present invention show an example of the embodiment, and do not limit the embodiment of the present invention.
＜第一の二次電池について：ＬＴＯ電池＞
本発明で使うＬＴＯ電池は、負極材料にチタン酸リチウム、正極材料にはマンガン酸リチウム、コバルト酸リチウム、三元系正極材（ＮＣＭ）などのリチウム化合物を使用した非水電解質の二次電池である。また、低温環境下、具体的には、－２０℃以下でも１Ｉ（Ａ）（電流値Ｉ（Ａ）＝電池の電気容量Ｃ（Ａｈ）／１（ｈ））以上の電流値でも充放電が可能な二次電池であることが好ましく、第二の二次電池よりも大電流値、具体的には、１Ｉ（Ａ）（電流値Ｉ（Ａ）＝電池の電気容量Ｃ（Ａｈ）／１（ｈ））以上の電流値で充放電が可能である二次電池である。
<About the first secondary battery: LTO battery>
The LTO battery used in the present invention is a secondary battery with a non-aqueous electrolyte that uses lithium titanate as a negative electrode material and a lithium compound such as lithium manganate, lithium cobalt oxide, or a ternary positive electrode material (NCM) as a positive electrode material. be. In addition, in a low temperature environment, specifically, charging and discharging is possible even at a current value of 1 I (A) (current value I (A) = battery electric capacity C (Ah) / 1 (h)) even at -20 ° C or lower. It is preferable that the secondary battery is capable of providing a higher current value than the second secondary battery. (h)) A secondary battery that can be charged and discharged at a current value equal to or above.
＜第二の二次電池について：リチウムイオン二次電池＞
本発明で用いることができるリチウムイオン二次電池としては、負極材料に黒鉛（グラファイト、ソフトカーボン）などの炭素系化合物を使用し、正極材料にはコバルト酸リチウム、マンガン酸リチウム、リン酸鉄リチウム、ニッケル酸リチウム、三元系正極材（ＮＣＭ）などのリチウム化合物を使用した非水電解質の二次電池があげられる。また、第一の二次電池よりも電池の電気容量が高容量の二次電池である。
<About the second secondary battery: Lithium ion secondary battery>
In the lithium ion secondary battery that can be used in the present invention, a carbon-based compound such as graphite (graphite, soft carbon) is used as the negative electrode material, and lithium cobalt oxide, lithium manganate, lithium iron phosphate is used as the positive electrode material. , lithium nickelate, and non-aqueous electrolyte secondary batteries using lithium compounds such as ternary cathode materials (NCM). In addition, the secondary battery has a higher electric capacity than the first secondary battery.
第一の二次電池、第二の二次電池、いずれにおいても、電池の形状は、円筒形、角型形、ラミネート型など、種々の形状が想定され、形状を限定するものではない。また、第一の二次電池、第二の二次電池、いずれにおいても、組電池の外装は樹脂製や金属製によるのが好ましいが、熱伝導度の観点からは、金属製が好ましい。金属製でも、特にアルミニウム製が好ましい。 In both the first secondary battery and the second secondary battery, various shapes such as a cylindrical shape, a rectangular shape, and a laminated shape are assumed, and the shapes are not limited. In addition, in both the first secondary battery and the second secondary battery, the exterior of the assembled battery is preferably made of resin or metal, but from the viewpoint of thermal conductivity, it is preferably made of metal. Even if it is made of metal, it is preferably made of aluminum.
＜組電池の構成＞
図１は、ラミネート型の２つの第一の二次電池の間に複数の円筒型の第二の二次電池を挟み込むように配置した組電池の構成を示す。ラミネート型の第一の電池は、長手方向の両端部に電力を取り出すための電極タブを備えた長方形であり、その長方形の長手方向と、円筒型電池の軸方向が直行するように配置されている。複数の円筒型電池は同一方向を向いて並列に配置されているが、例えば、正極と負極の向きを交互に配置し、配線によって直列配置になるようにしても良い。
<Composition of assembled battery>
FIG. 1 shows a configuration of an assembled battery in which a plurality of cylindrical second secondary batteries are sandwiched between two laminated first secondary batteries. The first laminated battery is rectangular with electrode tabs for taking out power at both ends in the longitudinal direction. there is Although a plurality of cylindrical batteries are arranged in parallel facing the same direction, for example, the positive and negative electrodes may be arranged alternately and arranged in series by wiring.
この発明で言う、「挟み込む」とは、電池同士が単に接するのではなく、第二の二次電池の最大投影面積が第一の二次電池により全てが覆われていることを意味する。具体的には、図２に示すように、第二の二次電池の最大投影面積は、第一の二次電池の面積よりも小さいものであり、どの様な配置であっても第二の二次電池が第一の二次電池に覆われている構成となることが好ましい。 In the present invention, "sandwiching" means that the batteries are not simply in contact with each other, but that the maximum projected area of the second secondary battery is entirely covered with the first secondary battery. Specifically, as shown in FIG. 2, the maximum projected area of the second secondary battery is smaller than the area of the first secondary battery. It is preferable that the secondary battery is covered with the first secondary battery.
また、図３に示すように、ラミネート型の第一の電池と、円筒型の第二の電池との隙間には、第一の二次電池の熱を第二の二次電池に効率的に伝えるための伝熱材料が、第一の二次電池と第二の二次電池の間に充填されていることが望ましい。伝熱材料としては、例えば、放熱シリコーンが挙げられる。熱伝導度の観点からは熱伝導率の大きいものが好ましく、電池表面の接触性からペースト状のものが好ましい。また、材料特性として難燃性を有していることがより好ましい。例えば、ＵＬ認証取得品ＵＬ９４Ｖ－０等が挙げられる。 In addition, as shown in FIG. 3, in the gap between the laminated first battery and the cylindrical second battery, the heat of the first secondary battery is efficiently transferred to the second secondary battery. It is desirable that a heat transfer material for conducting heat is filled between the first secondary battery and the second secondary battery. Examples of heat transfer materials include heat dissipating silicone. From the viewpoint of thermal conductivity, one having a high thermal conductivity is preferred, and a paste-like one is preferred from the standpoint of contact with the battery surface. Moreover, it is more preferable to have flame retardancy as a material property. For example, the UL certified product UL94V-0 and the like can be mentioned.
また、図４に示すように、ラミネート型の第一の電池の円筒型の第二の電池の隙間には、温度測定用素子が第一の電池と第二の電池の間に配置されることが望ましい。ここで言う、温度計測用素子とは、使用温度範囲が－５０℃～１２５℃程度のサーミスタ等が好ましく、例えば、セミテック製／高性能・薄型サーミスタ等が挙げられる。温度計測素子は、各電池に接するように配置することが好ましく、電池が発熱した際に温度が高くなりやすい箇所、或いは、電池の温度変化の大きい箇所に設置するのが好ましい。 Further, as shown in FIG. 4, a temperature measuring element is arranged between the first battery and the second battery in the gap between the first battery and the second battery. is desirable. Here, the temperature measuring element is preferably a thermistor or the like with a usable temperature range of about -50°C to 125°C, and examples thereof include a high-performance thin thermistor manufactured by Semitec. The temperature measuring element is preferably arranged so as to be in contact with each battery, and is preferably installed at a location where the temperature tends to rise when the battery generates heat, or at a location where the temperature of the battery changes greatly.
＜電池保持固定ケース＞
図５は、ラミネート型の２つの第一の二次電池の間に複数の円筒型の第二の二次電池を挟み込むように配置した二次電池をケースで保持固定した組電池の構成を示す。保持固定のケースは、樹脂製及び／又は金属製、さらに、樹脂と金属を組合わせたケースが好ましく、二次電池全体を囲い込む構成とする。樹脂製のケースは、難燃性、熱伝導性を有した材料が好ましく、金属製のケース、金属部は、アルミニウム製が好ましい。
<Battery holding fixed case>
FIG. 5 shows a configuration of an assembled battery in which a plurality of cylindrical secondary batteries are sandwiched between two laminated first secondary batteries, and the secondary batteries are held and fixed in a case. . The holding and fixing case is preferably made of resin and/or metal, or preferably a case made of a combination of resin and metal, and is configured to enclose the entire secondary battery. The resin case is preferably made of a material having flame retardancy and thermal conductivity, and the metal case and metal part are preferably made of aluminum.
図５では樹脂（６）と金属（７）を組合わせたケースの構成を示しており、樹脂（６）と金属（７）は一体成型で作製したケースでもよいし、樹脂（６）と金属（７）を各々組合わせてケース化としてもよい。第一の二次電池の電極構成群が固定ケースの金属部位に覆われた形状が好ましく、固定ケースの金属部位と第一の二次電池が接している構成が好ましい。また、第一の二次電池と固定ケースの金属部位の接触面には放熱シリコーン等の伝熱材料が塗布されていることがより好ましい。また、樹脂製、金属製のケースであっても、第一の二次電池と固定ケースの接触面には放熱シリコーン等の伝熱材料が塗布されていることが好ましい。 FIG. 5 shows the structure of the case in which the resin (6) and the metal (7) are combined. (7) may be combined to form a case. It is preferable that the electrode configuration group of the first secondary battery is covered with the metal part of the fixed case, and the metal part of the fixed case and the first secondary battery are preferably in contact with each other. Further, it is more preferable that the contact surface between the metal portion of the first secondary battery and the fixed case is coated with a heat transfer material such as heat dissipating silicone. Further, even if the case is made of resin or metal, it is preferable that the contact surface between the first secondary battery and the fixed case is coated with a heat transfer material such as heat dissipating silicone.
これにより、低温環境という要因以外で、第一の二次電池及び／又は第二の二次電池が高温になった際に、金属部と第一の二次電池が接していることで、電池の熱を外気へ放熱が可能となる構成とすることができる。 As a result, when the temperature of the first secondary battery and/or the second secondary battery reaches a high temperature other than the low-temperature environment, the contact between the metal portion and the first secondary battery causes the battery to can be configured such that the heat can be radiated to the outside air.
図５の構成において、上述の伝熱部材や温度計測素子を設けることはさらに好ましい実施態様である。 In the configuration of FIG. 5, it is a more preferable embodiment to provide the above-described heat transfer member and temperature measuring element.
＜組電池の充放電＞
第一の二次電池、第二の二次電池をそれぞれ充電又は放電する時は、第一の二次電池、第二の二次電池、各々を切り分けて充電又は放電が可能である組電池とする。つまり、第一の二次電池群と、第二の二次電池群は、別途の電池制御回路で充放電を実施可能なように構成されている。
<Charging and discharging of assembled battery>
When charging or discharging the first secondary battery and the second secondary battery, respectively, the first secondary battery and the second secondary battery can be separately charged or discharged. do. That is, the first secondary battery group and the second secondary battery group are configured to be capable of being charged and discharged by a separate battery control circuit.
また、本発明においては、負荷電力のソースとして、大電流値、具体的には、１Ｉ（Ａ）（電流値Ｉ（Ａ）＝電池の電気容量Ｃ（Ａｈ）／１（ｈ））以上の電流値が必要な時は第一の二次電池を使用し、多くの容量が長時間にわたって必要な時は第二の二次電池を使用することができる組電池とするのが好ましく、第二の二次電池を温める目的だけに第一の二次電池を使用するものではない。 In addition, in the present invention, a large current value, specifically, 1 I (A) (current value I (A) = battery electric capacity C (Ah) / 1 (h)) or more is used as a source of load power. It is preferable to use an assembled battery in which the first secondary battery is used when a large current value is required, and the second secondary battery is used when a large capacity is required for a long period of time. The first secondary battery is not used only for the purpose of warming the second secondary battery.
また、第一の二次電池或いは第二の二次電池の残存電力が少ない時、電力が少ない二次電池側に電力が多い二次電池側からの電力の受け渡しが可能である組電池とすることもできる。 Also, when the remaining power of the first secondary battery or the second secondary battery is low, the assembled battery can transfer power from the secondary battery side with high power to the secondary battery side with low power. can also
低温環境下で第二の二次電池を使用する場合、第二の二次電池の温度が０℃以下になっている時、第一の二次電池を強制的に充電又は放電を行い、第一の二次電池からの発熱を第二の二次電池が受け取ることにより、第二の二次電池が０℃以上になってから充放電を可能にするシステム構成とする。また、第二の二次電池に第一の二次電池の熱を伝熱させる時、第一の二次電池の充電又は放電の電流値は、１Ｉ（Ａ）（電流値Ｉ（Ａ）＝電池の電気容量Ｃ（Ａｈ）／１（ｈ））以上の電流値が好ましく、電流値は任意に設定できる構成とする。 When using the second secondary battery in a low temperature environment, when the temperature of the second secondary battery is 0°C or less, the first secondary battery is forcibly charged or discharged, and the second A system configuration is adopted in which heat generated from one secondary battery is received by the second secondary battery so that charging and discharging can be performed after the temperature of the second secondary battery reaches 0° C. or higher. Further, when the heat of the first secondary battery is transferred to the second secondary battery, the current value for charging or discharging the first secondary battery is 1I (A) (current value I (A) = A current value equal to or greater than the electric capacity C(Ah)/1(h)) of the battery is preferable, and the current value can be arbitrarily set.
低温環境下に関係無く、第一の二次電池及び／又は第二の二次電池の温度が４５℃及び／又は環境温度が４５℃以上になった時、第一の二次電池、第二の二次電池共に充電、放電を禁止するシステム構成とする。 Regardless of the low temperature environment, when the temperature of the first secondary battery and / or the second secondary battery reaches 45 ° C. and / or the environmental temperature reaches 45 ° C. or higher, the first secondary battery, the second The system configuration prohibits the charging and discharging of both secondary batteries.
本発明では、第一の二次電池の熱を、第二の二次電池にヒーター等の別途の加熱部材を設けることなく伝熱することができ、低温環境下でも第二の二次電池が温められることにより充放電を行うことが可能である。また、ヒーター等の加熱部材を有さないため、省スペースが達成できるとともに、組電池を複数個使用するシステムにおいて、複数個の内、いずれかの組電池の交換する必要性が生じたときにおいても、ヒーター等の加熱部材の取り外しを行うことなく、組電池のみの交換ができ、保守メンテナンスでも有用である。 In the present invention, the heat of the first secondary battery can be transferred to the second secondary battery without providing a separate heating member such as a heater, and the second secondary battery can be heated even in a low temperature environment. Charging and discharging can be performed by being warmed. In addition, since it does not have a heating member such as a heater, space can be saved. Also, the assembled battery can be replaced without removing a heating member such as a heater, which is useful in maintenance.
また、ヒーター等の加熱部材を加熱するための電力を電池群より供給する必要がないため、電池群に充電された電力を全て負荷に供給することを可能とする。 Moreover, since it is not necessary to supply electric power for heating a heating member such as a heater from the battery group, it is possible to supply all the electric power charged in the battery group to the load.
さらに、例えば、第一の二次電池もしくは第二の二次電池／又は組電池を、ヒーター等の加熱部材の電源として使用する場合、第一の二次電池もしくは第二の二次電池／又は組電池の電圧Ｖ１［Ｖ］において、発生する熱量（ヒーター電力）Ｗ１［Ｗ］となるよう設計されたヒーター部材に、異なる電圧Ｖ２［Ｖ］を印加した場合、発生する熱量（ヒーター部材電力）Ｗ２［Ｗ］は、下記の数式（１）に従って発熱量は電圧変化の二乗で影響が及ぶため、安定的に加熱することがむずかしく、温度制御専用の別回路を構成する必要があった。
Ｗ２＝Ｗ１×（Ｖ２／Ｖ１）２ ［Ｗ］ ・・・（１）
一方、本発明に係るハイブリッド型組電池によれば、第二の二次電池の温度安定化のために、温度制御専用の別回路を構成する必要もない。
Furthermore, for example, when the first secondary battery or second secondary battery / or assembled battery is used as a power source for a heating member such as a heater, the first secondary battery or second secondary battery / or When a different voltage V2 [V] is applied to a heater member designed to generate heat (heater power) W1 [W] at the assembled battery voltage V1 [V], the heat generated (heater member power) According to the following formula (1), W2 [W] is affected by the square of the voltage change, so it is difficult to stably heat, and it is necessary to configure a separate circuit dedicated to temperature control.
W2=W1×(V2/V1) 2 [W] (1)
On the other hand, according to the hybrid type assembled battery according to the present invention, there is no need to configure a separate circuit dedicated to temperature control in order to stabilize the temperature of the second secondary battery.
１．組電池
２．第一の二次電池
３．第二の二次電池
４．伝熱材料
５．温度測定素子
６．組電池ケース１
７．組電池ケース１の構成部である金属部
1.
7. A metal portion that is a component of the assembled
Claims (6)
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| JP2021053159A JP2022150521A (en) | 2021-03-26 | 2021-03-26 | Hybrid battery pack |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2021053159A JP2022150521A (en) | 2021-03-26 | 2021-03-26 | Hybrid battery pack |
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| JP2022150521A true JP2022150521A (en) | 2022-10-07 |
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