JP7207235B2 - battery system - Google Patents

battery system Download PDF

Info

Publication number
JP7207235B2
JP7207235B2 JP2019155799A JP2019155799A JP7207235B2 JP 7207235 B2 JP7207235 B2 JP 7207235B2 JP 2019155799 A JP2019155799 A JP 2019155799A JP 2019155799 A JP2019155799 A JP 2019155799A JP 7207235 B2 JP7207235 B2 JP 7207235B2
Authority
JP
Japan
Prior art keywords
heat
fluid
secondary battery
flow path
secondary batteries
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.)
Active
Application number
JP2019155799A
Other languages
Japanese (ja)
Other versions
JP2021034304A (en
Inventor
昌弘 糟谷
尭史 辻村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Boshoku Corp
Original Assignee
Toyota Boshoku Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyota Boshoku Corp filed Critical Toyota Boshoku Corp
Priority to JP2019155799A priority Critical patent/JP7207235B2/en
Publication of JP2021034304A publication Critical patent/JP2021034304A/en
Application granted granted Critical
Publication of JP7207235B2 publication Critical patent/JP7207235B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Description

本発明は、二次電池を温めることが可能な電池システムに関する。 The present invention relates to a battery system capable of warming secondary batteries.

一般に、リチウムイオン電池などの二次電池は、低温になると内部抵抗が高くなるので、常温時に比べて出力できる電力が低くなってしまう。このため、従来は、例えば特許文献１に示すように、電気ヒータによって冷却水及び潜熱蓄熱材を介して二次電池を温める構成の二次電池温度調整装置が提案されている。 In general, a secondary battery such as a lithium-ion battery has an increased internal resistance at low temperatures, so that the output power is lower than at room temperature. For this reason, conventionally, as shown in Patent Document 1, for example, there has been proposed a secondary battery temperature control device configured to warm the secondary battery via cooling water and a latent heat storage material with an electric heater.

特開２０１７－２１６０９８号公報JP 2017-216098 A

しかし、上述のような二次電池温度調整装置では、電気ヒータによって冷却水及び潜熱蓄熱材を介して二次電池を温める構成であるため、消費電力が大きくなってしまうという問題がある。 However, the secondary battery temperature control device as described above has a configuration in which the secondary battery is warmed by the electric heater via the cooling water and the latent heat storage material, so there is a problem that power consumption increases.

本発明は、このような従来技術に存在する問題点に着目してなされた。その目的は、消費電力を低減しつつ二次電池を温めることができる電池システムを提供することにある。 The present invention has been made by paying attention to such problems existing in the prior art. An object thereof is to provide a battery system capable of warming a secondary battery while reducing power consumption.

以下、上記課題を解決するための手段及びその作用効果について記載する。
上記課題を解決する電池システムは、熱を伝達する流体が循環する循環流路と、前記循環流路を循環する前記流体と熱交換可能に配置された二次電池と、前記循環流路に設けられ、熱を持つ前記流体を蓄える蓄熱部と、を備えることを要旨とする。 Means for solving the above problems and their effects will be described below.
A battery system for solving the above problems includes a circulation channel in which a heat-transferring fluid circulates, a secondary battery arranged so as to be capable of exchanging heat with the fluid circulating in the circulation channel, and a secondary battery provided in the circulation channel. and a heat storage unit that stores the fluid having heat.

この構成によれば、例えば二次電池が高温のときに二次電池の熱によって温められた流体は蓄熱部に蓄えておくことができるので、二次電池が低温のときに蓄熱部に蓄えた熱を持つ流体によって二次電池を温めることができる。このため、電力を使わずに二次電池を温めることができるので、消費電力を低減しつつ二次電池を温めることができる。 According to this configuration, for example, when the secondary battery is at a high temperature, the fluid warmed by the heat of the secondary battery can be stored in the heat storage unit. A fluid with heat can warm the secondary battery. Therefore, since the secondary battery can be warmed without using electric power, the secondary battery can be warmed while reducing power consumption.

一実施形態の電池システムにおいて、流体によって各二次電池を温めるときの状態を示す模式図。FIG. 2 is a schematic diagram showing a state when each secondary battery is warmed by a fluid in the battery system of one embodiment; 同電池システムの二次電池の放電回路の模式図。The schematic diagram of the discharge circuit of the secondary battery of the same battery system. 同電池システムの電気的構成を示すブロック図。FIG. 2 is a block diagram showing the electrical configuration of the same battery system; 同電池システムにおいて、流体によって各二次電池を冷却するときの状態を示す模式図。FIG. 2 is a schematic diagram showing a state when each secondary battery is cooled by fluid in the same battery system;

以下、電池システムの一実施形態を図面に従って説明する。
図１に示すように、電池システム１１は、例えばハイブリッド自動車などに搭載され、熱を伝達する流体が循環する矩形環状の循環流路１２と、循環流路１２における長手方向の一端と他端とを繋ぐ直線状の冷却流路１３とを備えている。冷却流路１３の一端と循環流路１２の長手方向の一端との連結部分には第１三方弁１４が設けられ、冷却流路１３の他端と循環流路１２の長手方向の他端との連結部分には第２三方弁１５が設けられている。 An embodiment of a battery system will be described below with reference to the drawings.
As shown in FIG. 1, a battery system 11 is mounted in, for example, a hybrid vehicle, and includes a rectangular ring-shaped circulation passage 12 in which heat-transferring fluid circulates, and one longitudinal end and the other longitudinal end of the circulation passage 12. and a straight cooling channel 13 connecting the A first three-way valve 14 is provided at a connecting portion between one end of the cooling channel 13 and one end in the longitudinal direction of the circulation channel 12, so that the other end of the cooling channel 13 and the other end in the longitudinal direction of the circulation channel 12 are connected. A second three-way valve 15 is provided at the connecting portion.

第１三方弁１４及び第２三方弁１５は、冷却流路１３に流体を流さない状態（図１に示す状態）と、冷却流路１３に流体を流す状態（図４に示す状態）との間で切り替えられる。冷却流路１３の中央部には、冷却流路１３を流れる流体を冷却するラジエータ１６が設けられている。なお、流体には空気などの各種気体や水などの各種液体を用いることができるが、本実施形態の流体には水が採用されている。 The first three-way valve 14 and the second three-way valve 15 are in a state in which no fluid flows through the cooling channel 13 (state shown in FIG. 1) and a state in which fluid flows through the cooling channel 13 (state shown in FIG. 4). can be switched between. A radiator 16 for cooling the fluid flowing through the cooling channel 13 is provided in the central portion of the cooling channel 13 . Various gases such as air and various liquids such as water can be used as the fluid, and water is used as the fluid in this embodiment.

循環流路１２における短手方向の一端側には流体を一方向に流すポンプ１７と熱交換部１８とが設けられ、循環流路１２における短手方向の他端側には蓄熱部１９と発熱部２０とが設けられている。したがって、ポンプ１７及び熱交換部１８と、蓄熱部１９及び発熱部２０とは、冷却流路１３を挟んで互いに反対側となるように循環流路１２に設けられている。 A pump 17 for flowing a fluid in one direction and a heat exchange section 18 are provided at one end side of the circulation flow path 12 in the width direction, and a heat storage section 19 and a heat generating section 19 are provided at the other end side of the circulation flow path 12 in the width direction. A section 20 is provided. Therefore, the pump 17 and the heat exchange section 18 and the heat storage section 19 and the heat generating section 20 are provided in the circulation flow path 12 so as to be opposite to each other with the cooling flow path 13 interposed therebetween.

ポンプ１７は、その駆動により、流体を循環流路１２に沿って図１における時計回りに循環させる。ポンプ１７と熱交換部１８とは、互いに隣り合うように配置されている。この場合、ポンプ１７と熱交換部１８とは、熱交換部１８の方がポンプ１７よりも循環流路１２における上流側に位置するように配置されている。熱交換部１８は、比較的熱伝導率の高い銅やアルミニウムなどの金属によって矩形板状に形成される。熱交換部１８の内部には、流体が流れる流路（図示略）が熱交換部１８全体にわたって蛇行して延びるように形成されている。 The pump 17 is driven to circulate the fluid clockwise in FIG. 1 along the circulation flow path 12 . The pump 17 and the heat exchange section 18 are arranged adjacent to each other. In this case, the pump 17 and the heat exchange section 18 are arranged such that the heat exchange section 18 is located upstream of the pump 17 in the circulation flow path 12 . The heat exchange portion 18 is formed in a rectangular plate shape from a metal having a relatively high thermal conductivity, such as copper or aluminum. Inside the heat exchanging portion 18 , a flow path (not shown) through which fluid flows is formed so as to meander and extend throughout the heat exchanging portion 18 .

熱交換部１８上には、ハイブリッド自動車の動力源となる複数の矩形板状の二次電池２１が互いに接触するように水平方向に並んで配置されている。すなわち、複数の二次電池２１は、循環流路１２を循環する流体と熱交換部１８において熱交換可能に配置されている。複数の二次電池２１には、複数の二次電池２１の温度を検出する温度センサ２２（図３参照）がそれぞれ取り付けられている。 A plurality of rectangular plate-shaped secondary batteries 21 serving as a power source of the hybrid vehicle are arranged horizontally on the heat exchange section 18 so as to be in contact with each other. That is, the plurality of secondary batteries 21 are arranged so as to be able to exchange heat with the fluid circulating in the circulation passage 12 in the heat exchange section 18 . A temperature sensor 22 (see FIG. 3) that detects the temperature of the plurality of secondary batteries 21 is attached to each of the plurality of secondary batteries 21 .

図１及び図２に示すように、複数の二次電池２１は、例えばリチウムイオン電池によって構成され、バスバー（図示略）によって直列に電気的に接続されている。複数の二次電池２１には、これらを強制的に放電させるための放電回路２３がそれぞれ設けられている。各放電回路２３は、スイッチ２４と抵抗２５とを有している。 As shown in FIGS. 1 and 2, the plurality of secondary batteries 21 are composed of lithium ion batteries, for example, and are electrically connected in series by bus bars (not shown). A plurality of secondary batteries 21 are each provided with a discharge circuit 23 for forcibly discharging them. Each discharge circuit 23 has a switch 24 and a resistor 25 .

そして、各放電回路２３のスイッチ２４をオンにすることで、二次電池２１から放電回路２３に電流が流れて二次電池２１が放電される。この場合、各放電回路２３の抵抗２５で発生する熱は、発熱部２０に供給されるようになっている。つまり、発熱部２０は、各放電回路２３によって強制的に放電させる二次電池２１の電気エネルギーによって発熱する。 By turning on the switch 24 of each discharge circuit 23 , current flows from the secondary battery 21 to the discharge circuit 23 and the secondary battery 21 is discharged. In this case, the heat generated by the resistor 25 of each discharge circuit 23 is supplied to the heat generating section 20 . That is, the heat generating part 20 generates heat by the electrical energy of the secondary battery 21 that is forcibly discharged by each discharge circuit 23 .

図３に示すように、電池システム１１は、電池システム１１全体を統括的に制御する制御部２６を備えている。制御部２６には、複数の温度センサ２２、複数の二次電池２１、ポンプ１７、第１三方弁１４、第２三方弁１５、及び複数の放電回路２３のスイッチ２４がそれぞれ電気的に接続されている。 As shown in FIG. 3 , the battery system 11 includes a control section 26 that controls the entire battery system 11 . The plurality of temperature sensors 22, the plurality of secondary batteries 21, the pump 17, the first three-way valve 14, the second three-way valve 15, and the switches 24 of the plurality of discharge circuits 23 are electrically connected to the control unit 26. ing.

制御部２６は、複数の温度センサ２２及び複数の二次電池２１から送信される信号に基づいて、ポンプ１７の駆動、第１三方弁１４の切替動作、第２三方弁１５の切替動作、及び複数の放電回路２３のスイッチ２４のオンオフの切替動作を制御する。なお、制御部２６には、各二次電池２１を効率よく使用する上での各二次電池２１の適切な温度範囲である所定温度範囲Ｔが記憶されている。 Based on the signals transmitted from the plurality of temperature sensors 22 and the plurality of secondary batteries 21, the control unit 26 drives the pump 17, switches the first three-way valve 14, switches the second three-way valve 15, and It controls the ON/OFF switching operation of the switches 24 of the plurality of discharge circuits 23 . The controller 26 stores a predetermined temperature range T, which is an appropriate temperature range for each secondary battery 21 for efficient use of each secondary battery 21 .

図２及び図３に示すように、通常、直列に接続された複数の二次電池２１の間では、製造上のばらつき、温度分布のばらつき、劣化状態の差などがあるため、充電量にばらつきが発生した状態になっている。この状態で複数の二次電池２１の充放電を行う場合、放電時には最も充電量の少ない二次電池２１が使用下限充電量になった時点で全ての二次電池２１の放電を停止しなければならない一方、充電時には最も充電量の多い二次電池２１が使用上限充電量になった時点で全ての二次電池２１の充電を停止しなければならない。 As shown in FIGS. 2 and 3, there are usually variations in manufacturing, variations in temperature distribution, and differences in the state of deterioration among the plurality of secondary batteries 21 connected in series. has occurred. When charging and discharging a plurality of secondary batteries 21 in this state, all the secondary batteries 21 must stop discharging when the secondary battery 21 with the smallest amount of charge during discharge reaches the lower limit of charge for use. On the other hand, charging of all the secondary batteries 21 must be stopped when the secondary battery 21 with the largest amount of charge reaches the upper limit charge amount for use.

こうした複数の二次電池２１の間での充電時のアンバランスを解消するため、電池システム１１では、制御部２６が、複数の二次電池２１の電圧を均一化して充電量を合わせるべく複数の二次電池２１を選択的且つ強制的に放電する制御、すなわちパッシブ方式のセルバランス制御を行う。 In the battery system 11, the controller 26 equalizes the voltages of the plurality of secondary batteries 21 to equalize the charging amounts of the plurality of secondary batteries 21 in order to eliminate such imbalance during charging among the plurality of secondary batteries 21. Control for selectively and forcibly discharging the secondary battery 21, that is, passive cell balance control is performed.

パッシブ方式のセルバランス制御では、複数の二次電池２１の放電時に、最も充電量の少ない二次電池２１が使用下限充電量になった時点で充電量が使用下限充電量よりも多い他の二次電池２１を、これらに対応するそれぞれの放電回路２３のスイッチ２４を制御部２６がオンにして選択的且つ強制的に放電させることにより、全ての二次電池２１の充電量を使用下限充電量に合わせる。 In the passive cell balance control, when the secondary battery 21 with the smallest charge amount reaches the lower limit charge amount for use when the plurality of secondary batteries 21 are discharged, the other two batteries whose charge amount is larger than the lower limit charge amount for use are discharged. By selectively and forcibly discharging the secondary batteries 21 by turning on the switches 24 of the respective discharge circuits 23 corresponding to them by the control unit 26, the charge amount of all the secondary batteries 21 is reduced to the use lower limit charge amount. match the

また、パッシブ方式のセルバランス制御では、複数の二次電池２１の充電時に、最も充電量の少ない二次電池２１が使用上限充電量に達するまで、これよりも先に使用上限充電量に達している他の二次電池２１を、これらに対応するそれぞれの放電回路２３のスイッチ２４を制御部２６がオンにして選択的且つ強制的に放電させることにより、全ての二次電池２１の充電量を使用上限充電量に合わせる。 In addition, in the passive cell balance control, when the plurality of secondary batteries 21 are charged, the secondary battery 21 with the smallest amount of charge reaches the upper limit charge amount before reaching the upper limit charge amount. The control unit 26 turns on the switches 24 of the discharge circuits 23 corresponding to these secondary batteries 21 to selectively and forcibly discharge the other secondary batteries 21, thereby reducing the charge amount of all the secondary batteries 21. Set it to the upper limit charge amount.

したがって、本実施形態では、複数の二次電池２１の電圧を均一化するべく複数の二次電池２１を選択的に放電させる放電部が、放電回路２３と制御部２６とによって構成される。 Therefore, in the present embodiment, the discharging circuit 23 and the control unit 26 constitute a discharging unit that selectively discharges the plurality of secondary batteries 21 in order to equalize the voltages of the plurality of secondary batteries 21 .

図１に示すように、蓄熱部１９と発熱部２０とは、互いに隣り合うように配置されている。この場合、蓄熱部１９と発熱部２０とは、発熱部２０の方が蓄熱部１９よりも循環流路１２における上流側に位置するように配置されている。したがって、蓄熱部１９には、その上流側に位置する発熱部２０の発熱によって温められて熱を持った流体が流れ込んで蓄えられる。なお、蓄熱部１９は、内部に蓄えた流体の熱が外部へ逃げることを効果的に抑制するべく、例えば真空断熱構造などの高い断熱性を持つ構造のケースによって構成することが好ましい。 As shown in FIG. 1, the heat storage section 19 and the heat generating section 20 are arranged adjacent to each other. In this case, the heat accumulating portion 19 and the heat generating portion 20 are arranged such that the heat generating portion 20 is located upstream of the heat accumulating portion 19 in the circulation flow path 12 . Therefore, the fluid warmed by the heat generated by the heat generating portion 20 located upstream flows into the heat storage portion 19 and is stored therein. In order to effectively prevent the heat of the fluid stored inside from escaping to the outside, the heat storage unit 19 is preferably configured by a case having a high heat insulating property such as a vacuum heat insulating structure.

次に、電池システム１１の作用について説明する。
例えば寒冷地において一晩放置したハイブリッド自動車のエンジンの始動時には、電池システム１１における各二次電池２１の温度が所定温度範囲Ｔに比べて格段に低い状態になっている。このため、各二次電池２１をできるだけ早く温めることが好ましい。そして、各二次電池２１を温める場合には、まず、図１に示すように、冷却流路１３に流体が流れない状態になるように、第１三方弁１４及び第２三方弁１５が切替動作される。 Next, operation of the battery system 11 will be described.
For example, the temperature of each secondary battery 21 in the battery system 11 is significantly lower than the predetermined temperature range T when the engine of a hybrid vehicle left overnight in a cold region is started. Therefore, it is preferable to warm each secondary battery 21 as quickly as possible. When warming each secondary battery 21, first, as shown in FIG. is operated.

続いて、ポンプ１７が駆動されると、流体は、冷却流路１３に流れることなく、循環流路１２に沿って図１における時計回りに流れる。すると、前回のハイブリッド自動車の使用中に行われたパッシブ方式のセルバランス制御による発熱部２０の発熱によって温められた流体が保温状態で蓄えられている蓄熱部１９から熱を持つ温かい流体が熱交換部１８に向かって流れる。そして、この温かい流体が熱交換部１８を流れる過程で、この流体の熱によって各二次電池２１が温められる。 Subsequently, when the pump 17 is driven, the fluid flows clockwise in FIG. Then, the warm fluid with heat from the heat storage unit 19, which is stored in a heat retaining state, is heated by the heat generation of the heat generating unit 20 by the passive cell balance control performed during the previous use of the hybrid vehicle. It flows towards section 18 . Then, while the warm fluid flows through the heat exchanging portion 18, each secondary battery 21 is warmed by the heat of the fluid.

各二次電池２１を温めて温度が下がった流体は、循環流路１２に沿って発熱部２０に向かって流れた後、再び蓄熱部１９に流れ込む。このようにして蓄熱部１９内の熱を持つ温かい流体が循環流路１２を循環することで、各二次電池２１が迅速に温められる。また、今回のハイブリッド自動車の使用中にパッシブ方式のセルバランス制御が行われると、発熱部２０が発熱するため、循環流路１２を流れる流体の温度が上昇する。このため、各二次電池２１がより一層迅速に温められる。そして、各二次電池２１の温度が所定温度範囲Ｔの下限を上回ると、ポンプ１７が停止される。 The fluid whose temperature has been lowered by warming each secondary battery 21 flows along the circulation flow path 12 toward the heat generation section 20 and then flows into the heat storage section 19 again. By circulating the warm fluid with heat in the heat storage unit 19 in the circulation flow path 12 in this manner, each secondary battery 21 is quickly warmed. Further, when the passive cell balance control is performed during use of the present hybrid vehicle, the heat generating portion 20 generates heat, so that the temperature of the fluid flowing through the circulation flow path 12 rises. Therefore, each secondary battery 21 is warmed up more quickly. Then, when the temperature of each secondary battery 21 exceeds the lower limit of the predetermined temperature range T, the pump 17 is stopped.

また、各二次電池２１は、その使用により発熱するため、徐々に温度が上昇する。そして、各二次電池２１の温度が所定温度範囲Ｔの上限を上回ると、各二次電池２１を冷却することが好ましい。各二次電池２１を冷却する場合には、まず、図４に示すように、冷却流路１３に流体が流れる状態になるように、第１三方弁１４及び第２三方弁１５が切替動作される。これにより、流体は、発熱部２０及び蓄熱部１９を流れなくなる。 In addition, since each secondary battery 21 generates heat as it is used, the temperature gradually rises. Then, when the temperature of each secondary battery 21 exceeds the upper limit of the predetermined temperature range T, each secondary battery 21 is preferably cooled. When cooling each secondary battery 21, first, as shown in FIG. be. As a result, the fluid stops flowing through the heat generating section 20 and the heat storage section 19 .

続いて、ポンプ１７が駆動されると、流体は、冷却流路１３を流れるようにして循環される。すなわち、ポンプ１７によって送り出された流体は、第１三方弁１４から冷却流路１３に流れ込み、ラジエータ１６を流れる過程で冷却され、その後、第２三方弁１５を経由して熱交換部１８に向かって流れる。そして、この冷却された流体は、熱交換部１８を流れる過程で各二次電池２１から熱を奪うことで、各二次電池２１を冷却する。 Subsequently, when the pump 17 is driven, the fluid is circulated through the cooling channel 13 . That is, the fluid sent out by the pump 17 flows from the first three-way valve 14 into the cooling channel 13, is cooled in the process of flowing through the radiator 16, and then passes through the second three-way valve 15 toward the heat exchange section 18. flow. The cooled fluid cools each secondary battery 21 by taking heat from each secondary battery 21 in the course of flowing through the heat exchange section 18 .

各二次電池２１を冷却して温度が上がった流体は、第１三方弁１４を経由して冷却流路１３に流れ込み、ラジエータ１６を流れる過程で冷却され、その後、第２三方弁１５を経由して熱交換部１８に向かって流れる。このようにしてラジエータ１６によって冷却された流体が循環することで、各二次電池２１が迅速に冷却される。そして、各二次電池２１の温度が所定温度範囲Ｔの上限を下回ると、ポンプ１７が停止される。 The fluid whose temperature has risen by cooling each secondary battery 21 flows into the cooling channel 13 via the first three-way valve 14, is cooled in the process of flowing through the radiator 16, and then passes through the second three-way valve 15. and flows toward the heat exchange section 18 . By circulating the fluid cooled by the radiator 16 in this way, each secondary battery 21 is quickly cooled. Then, when the temperature of each secondary battery 21 falls below the upper limit of the predetermined temperature range T, the pump 17 is stopped.

以上詳述した実施形態によれば、次のような効果が発揮される。
（１）電池システム１１は、熱を伝達する流体が循環する循環流路１２と、循環流路１２を循環する流体と熱交換可能に配置された複数の二次電池２１と、循環流路１２に設けられて熱を持つ流体を蓄える蓄熱部１９と、複数の二次電池２１の電圧を均一化するべく複数の二次電池２１を選択的に放電させる複数の放電回路２３及び制御部２６と、循環流路１２に設けられて上記放電させる電気エネルギーによって発熱する発熱部２０とを備える。この構成によれば、複数の二次電池２１の電圧を均一化する際に一部の二次電池２１から放電させる電気エネルギーによって発熱する発熱部２０の熱によって循環流路１２を循環する流体を温めることができる。そして、この温められた流体は蓄熱部１９に蓄えておくことができるので、各二次電池２１が低温のときに蓄熱部１９に蓄えた熱を持つ流体によって各二次電池２１を温めることができる。このため、電力を使わずに各二次電池２１を温めることができるので、消費電力を低減しつつ各二次電池２１を温めることができる。さらに、流体は、複数の二次電池２１の電圧を均一化するために無駄に消費しなければならない電気エネルギーによって温めることができるので、当該電気エネルギーを有効利用することができる。 According to the embodiment detailed above, the following effects are exhibited.
(1) The battery system 11 includes a circulation channel 12 in which a heat-transferring fluid circulates, a plurality of secondary batteries 21 arranged to be heat exchangeable with the fluid circulating in the circulation channel 12, and the circulation channel 12. A heat storage unit 19 that stores a fluid having heat provided in, a plurality of discharge circuits 23 and a control unit 26 that selectively discharge the plurality of secondary batteries 21 in order to equalize the voltages of the plurality of secondary batteries 21 and a heating portion 20 which is provided in the circulation flow path 12 and generates heat by the electric energy discharged. According to this configuration, when the voltages of the plurality of secondary batteries 21 are equalized, the fluid circulating in the circulation flow path 12 is heated by the heat generated by the heat generating portion 20 generated by the electrical energy discharged from some of the secondary batteries 21. can be warmed. Since this warmed fluid can be stored in the heat storage unit 19, each secondary battery 21 can be warmed by the fluid having heat stored in the heat storage unit 19 when each secondary battery 21 is at a low temperature. can. Therefore, since each secondary battery 21 can be warmed without using electric power, each secondary battery 21 can be warmed while reducing power consumption. Furthermore, the fluid can be warmed by electrical energy that must be wasted in order to equalize the voltages of the plurality of secondary batteries 21, so the electrical energy can be used effectively.

（２）電池システム１１において、発熱部２０は、循環流路１２における蓄熱部１９の上流側に設けられている。この構成によれば、発熱部２０の熱によって温められた流体を円滑に蓄熱部１９に供給することができる。 (2) In the battery system 11 , the heat generation section 20 is provided upstream of the heat storage section 19 in the circulation flow path 12 . According to this configuration, the fluid warmed by the heat of the heat generating section 20 can be smoothly supplied to the heat storage section 19 .

（変更例）
上記実施形態は、以下のように変更して実施することができる。また、上記実施形態及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。 (Change example)
The above embodiment can be implemented with the following modifications. Moreover, the above embodiments and the following modified examples can be implemented in combination with each other within a technically consistent range.

・電池システム１１において、発熱部２０は、蓄熱部１９内に設けるようにしてもよい。このようにすれば、蓄熱部１９内の流体を発熱部２０によって温めることができるので、蓄熱部１９内の流体の温度低下を効果的に抑制できる。 - In the battery system 11 , the heat generation unit 20 may be provided in the heat storage unit 19 . In this way, the fluid in the heat storage unit 19 can be warmed by the heat generating unit 20, so that the temperature drop of the fluid in the heat storage unit 19 can be effectively suppressed.

・電池システム１１において、発熱部２０は省略してもよい。この構成によれば、例えば二次電池２１が高温のときに二次電池２１の熱によって温められた流体を蓄熱部１９に蓄えておくことができるので、二次電池２１が低温のときに蓄熱部１９に蓄えた熱を持つ流体によって二次電池２１を温めることができる。このため、電力を使わずに二次電池２１を温めることができるので、消費電力を低減しつつ二次電池２１を温めることができる。 - In the battery system 11, the heating unit 20 may be omitted. According to this configuration, for example, when the secondary battery 21 is at a high temperature, the fluid warmed by the heat of the secondary battery 21 can be stored in the heat storage unit 19. Therefore, when the secondary battery 21 is at a low temperature, heat is stored. The secondary battery 21 can be warmed by the fluid having heat stored in the portion 19 . Therefore, since the secondary battery 21 can be warmed without using electric power, the secondary battery 21 can be warmed while reducing power consumption.

・電池システム１１は、発熱部２０を省略し、ハイブリッド自動車のエンジンの熱によって流体が温められて当該温められた流体が蓄熱部１９に蓄えられるように構成してもよい。 The battery system 11 may be configured such that the heat generation unit 20 is omitted and the fluid is warmed by the heat of the engine of the hybrid vehicle and the warmed fluid is stored in the heat storage unit 19 .

・電池システム１１において、二次電池２１は１つであってもよい。
・電池システム１１において、冷却流路１３及びラジエータ１６は省略してもよい。
・電池システム１１におけるラジエータ１６は、ハイブリッド自動車のエンジンを冷却するためのラジエータと兼用であってもよい。 - In the battery system 11, the number of the secondary batteries 21 may be one.
- In the battery system 11, the cooling channel 13 and the radiator 16 may be omitted.
- The radiator 16 in the battery system 11 may also serve as a radiator for cooling the engine of the hybrid vehicle.

・電池システム１１において、熱交換部１８は省略してもよい。この場合、各二次電池２１は、流体によって直接温められる。さらにこの場合には、流体として例えばフッ素系不活性液体であるフロリナート（登録商標）などの電気絶縁性を有する液体を採用することが好ましい。 - In the battery system 11, the heat exchange unit 18 may be omitted. In this case, each secondary battery 21 is directly warmed by the fluid. Furthermore, in this case, it is preferable to employ an electrically insulating liquid such as Fluorinert (registered trademark), which is a fluorine-based inert liquid, as the fluid.

１１…電池システム、１２…循環流路、１９…蓄熱部、２０…発熱部、２１…二次電池、２３…放電部を構成する放電回路、２６…放電部を構成する制御部。 DESCRIPTION OF SYMBOLS 11... Battery system, 12... Circulation flow path, 19... Heat storage part, 20... Heat generating part, 21... Secondary battery, 23... Discharge circuit which comprises a discharge part, 26... Control part which comprises a discharge part.

Claims (1)

熱を伝達する流体が循環する循環流路と、
前記循環流路を循環する前記流体と熱交換可能に配置された複数の二次電池と、
複数の前記二次電池と前記循環流路を循環する前記流体とにおいて熱交換する熱交換部と、
前記循環流路に設けられ、熱を持つ前記流体を蓄える蓄熱部と、
複数の前記二次電池の電圧を均一化するべく複数の前記二次電池を選択的に放電させる放電部と、
前記循環流路に設けられ、前記放電させる電気エネルギーによって発熱する発熱部と、
冷却流路と、
前記冷却流路に設けられ、前記冷却流路を流れる前記流体を冷却するラジエータと、
前記冷却流路に前記流体を流さずに前記循環流路に前記流体を流す第１状態と、前記循環流路に前記流体を流さずに前記冷却流路に前記流体を流す第２状態と、に切り替える弁と、
を備え、
前記第１状態のときに、前記発熱部は、前記蓄熱部内、又は、前記循環流路における前記熱交換部と前記蓄熱部との間に配置される
電池システム。 a circulation channel in which a heat-transferring fluid circulates;
a plurality of secondary batteries arranged so as to be capable of exchanging heat with the fluid circulating in the circulation channel;
a heat exchange unit that exchanges heat between the plurality of secondary batteries and the fluid circulating in the circulation passage;
a heat storage unit provided in the circulation flow path for storing the fluid having heat;
a discharge unit that selectively discharges the plurality of secondary batteries to equalize the voltages of the plurality of secondary batteries;
a heat-generating part provided in the circulation flow path and generating heat by the electric energy to be discharged;
a cooling channel;
a radiator provided in the cooling channel for cooling the fluid flowing through the cooling channel;
a first state in which the fluid is allowed to flow through the circulation flow path without causing the fluid to flow through the cooling flow path, and a second state in which the fluid is caused to flow through the cooling flow path without causing the fluid to flow through the circulation flow path; a valve that switches to
with
In the first state, the heat generating section is arranged within the heat storage section or between the heat exchange section and the heat storage section in the circulation flow path.
battery system.
JP2019155799A 2019-08-28 2019-08-28 battery system Active JP7207235B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019155799A JP7207235B2 (en) 2019-08-28 2019-08-28 battery system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2019155799A JP7207235B2 (en) 2019-08-28 2019-08-28 battery system

Publications (2)

Publication Number Publication Date
JP2021034304A JP2021034304A (en) 2021-03-01
JP7207235B2 true JP7207235B2 (en) 2023-01-18

Family

ID=74678705

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019155799A Active JP7207235B2 (en) 2019-08-28 2019-08-28 battery system

Country Status (1)

Country Link
JP (1) JP7207235B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022185157A1 (en) 2021-03-04 2022-09-09 Ricoh Company, Ltd. Set of processing fluid and inks, image forming method, and image forming apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013105620A (en) 2011-11-14 2013-05-30 Sumitomo Electric Ind Ltd Power supply system
JP2014158393A (en) 2013-02-18 2014-08-28 Mitsubishi Heavy Ind Ltd Vehicle and temperature control method for battery unit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3644241B2 (en) * 1998-03-30 2005-04-27 日産自動車株式会社 Charge control device for battery pack and control method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013105620A (en) 2011-11-14 2013-05-30 Sumitomo Electric Ind Ltd Power supply system
JP2014158393A (en) 2013-02-18 2014-08-28 Mitsubishi Heavy Ind Ltd Vehicle and temperature control method for battery unit

Also Published As

Publication number Publication date
JP2021034304A (en) 2021-03-01

Similar Documents

Publication Publication Date Title
US4007315A (en) Battery cell cooling system
JP5168853B2 (en) Power system
JP5362269B2 (en) Battery pack for vehicles
US9797631B2 (en) Temperature-control device and method for the temperature control of an energy store
JP5757502B2 (en) Battery temperature control unit and battery temperature control device
US20200227801A1 (en) Active rechargeable battery thermal management system
US20090253028A1 (en) Temperature adjustment mechanism and vehicle
JP6693480B2 (en) Terminal cooling device
KR20130107354A (en) Battery module, battery temperature managing system and vehicle comprising the same
KR20160148938A (en) System and method for battery thermal management
KR20200134492A (en) Heat exchanger with thermoelectric module and system for managing heat for battery including the same
US9509018B2 (en) Expanded battery cooling fin
JP2018153074A (en) Charging device and on-vehicle power supply unit
JP2017105290A (en) Temperature control device of battery for driving
JP7207235B2 (en) battery system
JP2010277948A (en) Battery pack device
JP2009140654A (en) Power supply device
JP4263052B2 (en) Temperature control device for electric double layer capacitor
KR102371514B1 (en) A Cooling/Heating Structure composed of cylindrical battery Cells
US9960464B2 (en) Method and device for homogenizing the temperature distribution of bodies which have fluidic temperature control
WO2020022087A1 (en) Battery temperature adjustment device
JP2020043037A (en) Battery unit
WO2022016871A1 (en) Battery heating system, battery device and electric vehicle
CN108134147A (en) The automobile batteries of capillary network heat dissipation
WO2012147128A1 (en) Vehicle power source and vehicle

Legal Events

Date Code Title Description
RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20191128

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20191206

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20220128

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20220920

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20221117

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20221206

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20221219

R151 Written notification of patent or utility model registration

Ref document number: 7207235

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151