JP2016018637A - Temperature control device of battery - Google Patents

Temperature control device of battery Download PDF

Info

Publication number
JP2016018637A
JP2016018637A JP2014139798A JP2014139798A JP2016018637A JP 2016018637 A JP2016018637 A JP 2016018637A JP 2014139798 A JP2014139798 A JP 2014139798A JP 2014139798 A JP2014139798 A JP 2014139798A JP 2016018637 A JP2016018637 A JP 2016018637A
Authority
JP
Japan
Prior art keywords
battery
air
temperature
thermal runaway
battery pack
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.)
Granted
Application number
JP2014139798A
Other languages
Japanese (ja)
Other versions
JP6350812B2 (en
Inventor
宗光 王
Munemitsu O
宗光 王
哲嗣 浮田
Tetsutsugu Ukita
哲嗣 浮田
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.)
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Motors 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 Mitsubishi Motors Corp filed Critical Mitsubishi Motors Corp
Priority to JP2014139798A priority Critical patent/JP6350812B2/en
Publication of JP2016018637A publication Critical patent/JP2016018637A/en
Application granted granted Critical
Publication of JP6350812B2 publication Critical patent/JP6350812B2/en
Expired - Fee Related 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

Abstract

PROBLEM TO BE SOLVED: To enhance safety of a battery at the time of thermal runaway.SOLUTION: A temperature control device of a battery for controlling the temperature of a battery cell 4 incorporated in a battery pack 2, by passing air from an introduction port 6 provided in the battery pack 2 through an exhaust port 7 and an exhaust duct 8 includes a cooling fan 10 for sucking air in the battery pack 2 from the exhaust port 7, an intake valve 12 for opening and closing the introduction port 6, a battery temperature sensor 21 for detecting thermal runaway by the temperature of the battery cell 4, and a cell management unit 20 for closing the intake valve 12 and sucks air in the battery pack 2 by means of the cooling fan 10 when the temperature indicating thermal runaway is detected by a battery temperature sensor 21, and opening the intake valve 12 upon elapsing a predetermined time Tvo after closing the intake valve 12 and stating suction by means of the cooling fan 10.SELECTED DRAWING: Figure 1

Description

本発明は、電池パック内に空気を通過させて電池パック内の電池を温調する電池の温調装置に関する。   The present invention relates to a battery temperature control device that controls the temperature of a battery in a battery pack by allowing air to pass through the battery pack.

電気自動車やハイブリッド車等のように高容量高出力の電池を搭載した車両において、当該電池を温調する電池温調装置を備えたものがある。電池温調装置としては、例えば複数の電池セルを収納した電池パック内に外気等の空気を通過させて冷却する空冷式の冷却装置が知られている。
例えば特許文献１には、電池パック（バッテリボックス）に空気の導入口と排気口とを設け、ファンによって空気を導入口に強制的に導入して、電池パック内の電池（バッテリ）を冷却し、排気口から空気を排出する構造の冷却装置が開示されている。 Some vehicles equipped with a high-capacity, high-power battery such as an electric vehicle or a hybrid vehicle are equipped with a battery temperature control device for controlling the temperature of the battery. As a battery temperature control device, for example, an air-cooling type cooling device that cools air such as outside air by passing it through a battery pack that houses a plurality of battery cells is known.
For example, in Patent Document 1, an air inlet and an exhaust port are provided in a battery pack (battery box), and air is forcibly introduced into the inlet by a fan to cool a battery (battery) in the battery pack. A cooling device having a structure for discharging air from an exhaust port is disclosed.

特開２００８−２５４６２７号公報JP 2008-254627 A

上記特許文献１のように、電池パック内に空気を導入して電池の冷却を行う車両において、導入口及び排気口の少なくともいずれか一方に開閉弁を備え、電池の温度低下時には開閉弁を閉弁しておき、電池の温度上昇時に開閉弁を開弁するとともにファンを作動して空気を導入し電池パック内の電池を冷却するものがある。
しかしながら、上記のように開閉弁及びファンを備えた冷却装置では、電池の熱暴走により電池から可燃ガスが発生した場合、電池パック内に可燃ガスが充満しているときに、電池を冷却すべく開閉弁を開弁するとともにファンを作動させると、電池パック内への多量な空気の供給によって急激な発火燃焼を引き起こす虞がある。 In a vehicle that cools a battery by introducing air into the battery pack as in Patent Document 1, the vehicle is provided with an opening / closing valve in at least one of the introduction port and the exhaust port, and the opening / closing valve is closed when the temperature of the battery decreases. In some cases, the valve is opened when the temperature of the battery rises, and the fan is operated to introduce air to cool the battery in the battery pack.
However, in the cooling device having the on-off valve and the fan as described above, when combustible gas is generated from the battery due to thermal runaway of the battery, the battery pack should be cooled when the combustible gas is filled in the battery pack. When the on-off valve is opened and the fan is operated, there is a risk of sudden ignition and combustion due to the supply of a large amount of air into the battery pack.

また、排気口側にファンを設けて電池パックから電池パック内の空気を吸い出すような構造の場合、電池パック内で高温となった空気がファンを通過するので、ファンの耐久性が低下するといった問題点もある。
本発明は、上述した課題を解決すべくなされたものであり、その目的とするところは、熱暴走時に電池を冷却すべく電池パック内に空気を導入した際の安全性を向上させる電池の温調装置を提供することにある。 In addition, in the case of a structure in which a fan is provided on the exhaust port side and the air in the battery pack is sucked out from the battery pack, the high-temperature air in the battery pack passes through the fan, so that the durability of the fan is reduced. There are also problems.
The present invention has been made to solve the above-described problems, and the object of the present invention is to improve the safety of the battery when air is introduced into the battery pack to cool the battery during thermal runaway. It is to provide a preparation device.

上記の目的を達成するべく、請求項１の電池の温調装置は、電池パックに備えられた導入口から排気口に空気を通過させて、前記電池パックに内蔵された電池を温調する電池の温調装置であって、前記排気口から前記電池パック内の空気を吸い出す送風機と、前記導入口を開閉する開閉器と、前記電池の熱暴走を検出する熱暴走検出器と、前記熱暴走検出器により前記電池の熱暴走が検出された際に、前記開閉器により前記導入口を閉口した後に、前記送風機による前記電池パック内からの空気の吸い出しを行い、当該送風機による吸い出し開始から所定時間経過した後に、前記開閉器を作動制御して前記導入口を開口させる制御装置と、を備えたことを特徴とする。   In order to achieve the above object, a battery temperature control apparatus according to claim 1 is a battery that controls the temperature of a battery built in the battery pack by allowing air to pass from an introduction port provided in the battery pack to an exhaust port. A temperature control device for sucking air in the battery pack from the exhaust port, a switch for opening and closing the introduction port, a thermal runaway detector for detecting thermal runaway of the battery, and the thermal runaway When a thermal runaway of the battery is detected by the detector, after the introduction port is closed by the switch, air is sucked out from the battery pack by the blower, and a predetermined time from the start of sucking by the blower And a controller for controlling the operation of the switch after the elapse of time to open the introduction port.

また、請求項２の電池の温調装置は、請求項１において、前記電池パックは複数の前記電池を内蔵し、前記熱暴走検出器は、複数の前記電池毎に熱暴走を検出し、前記制御装置は、更に、前記熱暴走が検出された前記電池の個数が増加するに伴って、前記所定時間を増加させることを特徴とする。
また、請求項３の電池の温調装置は、請求項１または２において、前記熱暴走検出器は、前記電池の温度に基づいて前記熱暴走を検出することを特徴とする。 The battery temperature control device according to claim 2 is the battery temperature control device according to claim 1, wherein the battery pack includes a plurality of the batteries, and the thermal runaway detector detects thermal runaway for each of the plurality of batteries. The control device may further increase the predetermined time as the number of the batteries in which the thermal runaway is detected increases.
According to a third aspect of the present invention, there is provided the battery temperature control device according to the first or second aspect, wherein the thermal runaway detector detects the thermal runaway based on a temperature of the battery.

また、請求項４の電池の温調装置は、請求項１または２において、前記熱暴走検出器は、前記電池の電圧に基づいて前記熱暴走を検出することを特徴とする。
また、請求項５の電池の温調装置は、請求項１から４のいずれか１項において、前記電池パックの排気口と前記送風機との間の空気通路に空気を導入する空気導入路が設けられたことを特徴とする。 According to a fourth aspect of the present invention, there is provided the battery temperature control device according to the first or second aspect, wherein the thermal runaway detector detects the thermal runaway based on a voltage of the battery.
According to a fifth aspect of the present invention, there is provided the battery temperature control device according to any one of the first to fourth aspects, wherein an air introduction path for introducing air into the air passage between the exhaust port of the battery pack and the blower is provided. It is characterized by that.

また、請求項６の電池の温調装置は、請求項５において、前記排気口から排出される空気の温度を検出する排気温度検出器と、前記空気導入路から前記空気通路に導入される空気量を調節する調節器と、を更に備え、前記制御装置は、更に、前記排気温度検出器によって検出された前記空気の温度に基づいて、前記調節器による前記空気通路に導入される空気量の調節を行うことを特徴とする。   According to a sixth aspect of the present invention, there is provided the battery temperature control device according to the fifth aspect, wherein the temperature of the air discharged from the exhaust port is detected, and the air introduced from the air introduction path into the air passage. A controller for adjusting the amount, and the control device further controls the amount of air introduced into the air passage by the controller based on the temperature of the air detected by the exhaust gas temperature detector. It is characterized by adjusting.

請求項１の電池の温調装置によれば、電池が熱暴走した際に、導入口が閉じられるので、電池パック内への空気の供給が停止される。したがって、熱暴走した電池から発生した可燃性ガスが多量に電池パックに充満したとしても、送風機の作動によって多量の空気が電池パック内へ流入することが防止される。これにより、電池パック内での可燃性ガスの発火燃焼を防止して、安全性を向上させることができる。また、導入口の閉口とともに送風機が作動されることで、電池パック内の可燃性ガスが空気とともに排気口から少しずつ吸い出され、電池パック内の可燃性ガス濃度が徐々に低下する。そして、所定時間経過した後に導入口を開口させることで、電池パック内での可燃性ガスの発火燃焼を防止した上で、送風機の作動後に電池の冷却を推進させることができ、更なる熱暴走を抑制することができる。   According to the battery temperature control apparatus of the first aspect, since the inlet is closed when the battery runs out of heat, the supply of air into the battery pack is stopped. Therefore, even if the battery pack is filled with a large amount of combustible gas generated from the thermal runaway battery, a large amount of air is prevented from flowing into the battery pack due to the operation of the blower. Thereby, the ignition combustion of the combustible gas in the battery pack can be prevented, and safety can be improved. Further, when the blower is operated along with the closing of the introduction port, the combustible gas in the battery pack is sucked out from the exhaust port together with air little by little, and the concentration of the combustible gas in the battery pack gradually decreases. Then, after the predetermined time has elapsed, the introduction port is opened to prevent ignition and combustion of the combustible gas in the battery pack, and then the cooling of the battery can be promoted after the operation of the blower. Can be suppressed.

請求項２の電池の温調装置によれば、熱暴走している電池の個数が増加するに伴って所定時間を増加させることで、熱暴走している電池の個数が多くとも電池パック内の可燃性ガスを十分に排出させてから導入口を開口させることができ、電池パック内の可燃性ガスの発火燃焼を防止して安全性を向上させることができる。
請求項３の電池の温調装置によれば、電池の温度に基づいて、熱暴走しているか否かを判別することができ、送風機及び開閉器の作動制御により電池パック内での可燃性ガスの発火燃焼を防止した上で、電池を冷却して更なる熱暴走を抑制することができる。 According to the battery temperature control apparatus of claim 2, the predetermined time is increased as the number of batteries that are thermally runaway increases, so that at most the number of batteries that are thermally runaway is within the battery pack. After the combustible gas is sufficiently discharged, the introduction port can be opened, and ignition and combustion of the combustible gas in the battery pack can be prevented to improve safety.
According to the temperature control device for a battery of claim 3, it is possible to determine whether or not the thermal runaway occurs based on the temperature of the battery, and the combustible gas in the battery pack is controlled by the operation control of the blower and the switch. In addition, the battery can be cooled and further thermal runaway can be suppressed.

請求項４の電池の温調装置によれば、電池の電圧に基づいて、熱暴走しているか否かを判別することができ、送風機及び開閉器の作動制御により電池パック内での可燃性ガスの発火燃焼を防止した上で、電池を冷却して更なる熱暴走を抑制することができる。
請求項５の電池の温調装置によれば、電池が熱暴走したときに、排気口から排出される電池パック内の空気に空気導入路から導入された空気が混合して、送風機を通過する空気の温度を低下させることができ、送風機の保護を図ることができる。 According to the battery temperature control apparatus of claim 4, it is possible to determine whether or not the thermal runaway occurs based on the voltage of the battery, and the combustible gas in the battery pack is controlled by the operation control of the blower and the switch. In addition, the battery can be cooled and further thermal runaway can be suppressed.
According to the temperature control device for a battery of claim 5, when the battery runs out of heat, the air in the battery pack discharged from the exhaust port is mixed with the air introduced from the air introduction path and passes through the blower. The temperature of the air can be lowered, and the blower can be protected.

請求項６の電池の温調装置によれば、排気口から排出される空気の温度に基づいて空気導入路から空気通路に導入される空気量が調節されることで、送風機を通過する空気の温度を適切に調節することができる。これにより、送風機の保護を図るとともに、必要以上の空気導入路からの空気の導入を抑えて、送風機による電池パック内の空気の吸い出しを効率よく行うことができる。   According to the temperature control device for a battery of claim 6, the amount of air passing through the blower is adjusted by adjusting the amount of air introduced from the air introduction path into the air passage based on the temperature of the air discharged from the exhaust port. The temperature can be adjusted appropriately. Thereby, while protecting a blower, the introduction of the air from an air introduction path more than necessary can be suppressed, and the air in a battery pack by a blower can be efficiently sucked out.

本発明の一実施形態に係る電池の温調装置の概略構成図である。It is a schematic block diagram of the temperature control apparatus of the battery which concerns on one Embodiment of this invention. 本実施形態における熱暴走時の温調装置の作動要領を示すフローチャートである。It is a flowchart which shows the operating point of the temperature control apparatus at the time of the thermal runaway in this embodiment. 調節弁の開度設定用マップの一例である。It is an example of the opening degree setting map of a control valve. 吸気弁を開弁する所定時間の設定要領を説明するグラフである。It is a graph explaining the setting point of the predetermined time which opens an intake valve.

以下、本発明の実施形態について図面を参照しながら説明する。
図１は、本発明の一実施形態に係る電池の温調装置の概略構成図である。
本実施形態の電池の温調装置１は、例えば電気自動車やプラグインハイブリッド車のように、走行駆動用モータへ電力を出力する電池を搭載した車両に適用される。
図１に示すように、車両に搭載された電池パック２は、ケース３内に複数の電池セル４（電池)を搭載して構成されている。電池パック２では、隣り合う電池セル４が離間して配置され、電池セル４の間及び電池セル４の上部及び下部に空気の流通路５が形成されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a battery temperature control device according to an embodiment of the present invention.
The battery temperature control device 1 of the present embodiment is applied to a vehicle equipped with a battery that outputs electric power to a travel drive motor, such as an electric vehicle or a plug-in hybrid vehicle.
As shown in FIG. 1, a battery pack 2 mounted on a vehicle is configured by mounting a plurality of battery cells 4 (batteries) in a case 3. In the battery pack 2, adjacent battery cells 4 are spaced from each other, and air flow paths 5 are formed between the battery cells 4 and at the upper and lower portions of the battery cells 4.

電池パック２の車両前側下部には、電池パック２内に空気を導入する導入口６が設けられている。また、電池パック２の車両後側上部には、電池パック２内から空気を排出する排気口７が設けられている。
電池パック２には、排気口７から延出して空気通路となる排気ダクト８が設けられている。排気ダクト８の先端部には、電動式の冷却ファン１０（送風機）が設けられており、当該冷却ファン１０の回転により電池パック２内から空気が吸い出される。 An introduction port 6 for introducing air into the battery pack 2 is provided at the vehicle front side lower portion of the battery pack 2. Further, an exhaust port 7 for exhausting air from the inside of the battery pack 2 is provided at the upper rear side of the battery pack 2.
The battery pack 2 is provided with an exhaust duct 8 extending from the exhaust port 7 and serving as an air passage. An electric cooling fan 10 (blower) is provided at the tip of the exhaust duct 8, and air is sucked out of the battery pack 2 by the rotation of the cooling fan 10.

また、排気ダクト８に連結して空気導入路９が設けられている。空気導入路９は、排気口７と冷却ファン１０との間の排気ダクト８内に外気を導入する機能を有する。空気導入路９には当該空気導入路９の開度（流路面積）を変更する調節弁１１（調節器）が設けられている。
また、電池パック２には、導入口６を開閉する吸気弁１２（開閉器）が設けられている。 An air introduction path 9 is provided in connection with the exhaust duct 8. The air introduction path 9 has a function of introducing outside air into the exhaust duct 8 between the exhaust port 7 and the cooling fan 10. The air introduction path 9 is provided with a regulating valve 11 (regulator) that changes the opening degree (flow area) of the air introduction path 9.
In addition, the battery pack 2 is provided with an intake valve 12 (switch) that opens and closes the inlet 6.

冷却ファン１０を作動させると、排気口７から排気ダクト８を通過して、電池パック２内の空気が排出される。このとき、吸気弁１２を開弁させることで、導入口６から電池パック２内に空気が導入され、電池パック２内の流通路５を通過して、排気口７から排出される。これにより、高温となった電池セル４を外気と熱交換して冷却することができる。
冷却ファン１０、調節弁１１及び吸気弁１２は、車両に搭載に搭載されたセルマネジメントユニット２０（制御装置）により作動制御される。 When the cooling fan 10 is operated, the air in the battery pack 2 is discharged from the exhaust port 7 through the exhaust duct 8. At this time, by opening the intake valve 12, air is introduced into the battery pack 2 from the introduction port 6, passes through the flow passage 5 in the battery pack 2, and is discharged from the exhaust port 7. Thereby, the battery cell 4 which became high temperature can be cooled by exchanging heat with the outside air.
The cooling fan 10, the control valve 11, and the intake valve 12 are controlled by a cell management unit 20 (control device) mounted on the vehicle.

また、電池パック２内の各電池セル４には、夫々電池セル４の温度を検出する電池温度センサ２１（熱暴走検出器）が設けられている。
更に、電池パック２には、排気口７から排出される空気の温度（排気温度）を検出する排気温度センサ１３（排気温度検出器）を備えている。
セルマネジメントユニット２０は、入出力装置、記憶装置（ＲＯＭ、ＲＡＭ、不揮発性ＲＡＭ等）、中央演算処理装置（ＣＰＵ）及びタイマ等を含んで構成され、各電池温度センサ２１から電池セル４の温度を入力するとともに排気温度センサ１３から排気温度を入力し、冷却ファン１０、調節弁１１及び吸気弁１２を作動制御する。 Each battery cell 4 in the battery pack 2 is provided with a battery temperature sensor 21 (thermal runaway detector) that detects the temperature of the battery cell 4.
Further, the battery pack 2 is provided with an exhaust temperature sensor 13 (exhaust temperature detector) for detecting the temperature of the air discharged from the exhaust port 7 (exhaust temperature).
The cell management unit 20 includes an input / output device, a storage device (ROM, RAM, nonvolatile RAM, etc.), a central processing unit (CPU), a timer, and the like, and the temperature of the battery cell 4 from each battery temperature sensor 21. And the exhaust temperature from the exhaust temperature sensor 13 are input to control the operation of the cooling fan 10, the control valve 11 and the intake valve 12.

セルマネジメントユニット２０は、車両電源オフ時に全ての電池セル４の温度が許容範囲内である場合には、冷却ファン１０の作動を停止し、吸気弁１２を閉弁する。
図２は、本実施形態のセルマネジメントユニット２０において実行される熱暴走時の温調装置１の作動要領を示すフローチャートである。図３は、調節弁の開度設定用マップの一例である。図４は、吸気弁を開弁する所定時間の設定要領を説明するグラフである。 The cell management unit 20 stops the operation of the cooling fan 10 and closes the intake valve 12 when the temperature of all the battery cells 4 is within the allowable range when the vehicle power is turned off.
FIG. 2 is a flowchart showing an operation procedure of the temperature control device 1 during thermal runaway executed in the cell management unit 20 of the present embodiment. FIG. 3 is an example of a control valve opening setting map. FIG. 4 is a graph for explaining a setting procedure of a predetermined time for opening the intake valve.

本制御は、車両電源オン時に繰り返し実行される。
始めにステップＳ１０では、通常冷却を行う。通常冷却は、電池セル４の温度が許容範囲の上限値より低い温度で適宜設定された所定温度Ｔ1以上となると、吸気弁１２を開弁し、冷却ファン１０を作動させて、電池セル４を冷却する制御である。なお、電池セル４の温度が上記所定温度Ｔ1未満である場合には、吸気弁１２を閉弁し、冷却ファン１０を停止させる。そして、ステップＳ２０に進む。 This control is repeatedly executed when the vehicle power is turned on.
First, in step S10, normal cooling is performed. In the normal cooling, when the temperature of the battery cell 4 becomes equal to or higher than a predetermined temperature T1 appropriately set at a temperature lower than the upper limit value of the allowable range, the intake valve 12 is opened and the cooling fan 10 is operated to This is the cooling control. When the temperature of the battery cell 4 is lower than the predetermined temperature T1, the intake valve 12 is closed and the cooling fan 10 is stopped. Then, the process proceeds to step S20.

ステップＳ２０では、熱暴走セルがあるか否かを判別する。複数の電池セル４のうち、少なくとも１つの電池セル４で熱暴走がある場合には、ステップＳ３０に進む。全ての電池セル４で熱暴走がない場合には、ステップＳ２０に戻る。熱暴走があるか否かは、電池セル４の電池温度センサ２１から入力した電池セル４の温度Ｔcが、あらかじめ設定された所定温度Ｔ2より高い場合に、熱暴走ありと判定すればよい。所定温度Ｔ2は、熱暴走時に到達する電池セル４の温度に設定すればよい。なお、電池セル４の温度Ｔcの代わりに、各電池セル４の電圧Ｖcを検出する電圧センサ２２（熱暴走検出器）を設け、少なくとも１つの電池セル４で電圧センサ２２により検出した電圧Ｖcが急激に大きく変動した場合に熱暴走ありと判定してもよい。   In step S20, it is determined whether there is a thermal runaway cell. If there is a thermal runaway in at least one battery cell 4 among the plurality of battery cells 4, the process proceeds to step S30. If there is no thermal runaway in all the battery cells 4, the process returns to step S20. Whether or not there is thermal runaway may be determined as thermal runaway when the temperature Tc of the battery cell 4 input from the battery temperature sensor 21 of the battery cell 4 is higher than a predetermined temperature T2 set in advance. The predetermined temperature T2 may be set to the temperature of the battery cell 4 that is reached during the thermal runaway. A voltage sensor 22 (thermal runaway detector) for detecting the voltage Vc of each battery cell 4 is provided instead of the temperature Tc of the battery cell 4, and the voltage Vc detected by the voltage sensor 22 in at least one battery cell 4 is It may be determined that there is a thermal runaway when there is a sudden large fluctuation.

ステップＳ３０では、吸気弁１２を閉弁させ、その後に冷却ファン１０をオンに（作動）する。なお、電池セル４の温度低下等により吸気弁１２が閉弁状態である場合には、閉弁状態を維持する。そして、ステップＳ４０に進む。
ステップＳ４０では、排気温度センサ１３から排気温度を入力し、当該排気温度に基づいて、調節弁１１の開度を制御する。そして、ステップＳ５０に進む。 In step S30, the intake valve 12 is closed, and then the cooling fan 10 is turned on (actuated). Note that when the intake valve 12 is in a closed state due to a decrease in temperature of the battery cell 4 or the like, the closed state is maintained. Then, the process proceeds to step S40.
In step S40, the exhaust temperature is input from the exhaust temperature sensor 13, and the opening degree of the control valve 11 is controlled based on the exhaust temperature. Then, the process proceeds to step S50.

図３に示すように、排気温度が上昇するに伴って、調節弁１１の開度を増加させるように制御する。排気温度が、冷却ファン１０の耐久温度(上限値)に近い高温では、耐久温度に到達する前に調節弁１１が全開となるように制御すればよい。また、冷却ファンの耐久温度(上限値)に直ぐに達しないような低温では、調節弁１１が全閉とすればよく、その間では連続的に変更するように設定すればよい。   As shown in FIG. 3, the opening degree of the control valve 11 is controlled to increase as the exhaust gas temperature rises. When the exhaust gas temperature is close to the endurance temperature (upper limit value) of the cooling fan 10, the control valve 11 may be controlled to be fully opened before reaching the endurance temperature. Further, at a low temperature that does not immediately reach the endurance temperature (upper limit value) of the cooling fan, the control valve 11 may be fully closed, and may be set to change continuously during that time.

ステップＳ５０では、ステップ３０において吸気弁１２が閉弁及び冷却ファン１０がオンになった状態からの経過時間Ｔonを計測し、当該経過時間Ｔonが、あらかじめ設定された所定時間Ｔvoを過ぎたか否かを判別する。経過時間Ｔonが、所定時間Ｔvoを過ぎている場合には、ステップＳ５０に進む。経過時間Ｔonが、所定時間Ｔvoを過ぎていない場合には、ステップＳ４０に戻る。   In step S50, an elapsed time Ton from the state in which the intake valve 12 is closed and the cooling fan 10 is turned on in step 30 is measured, and whether or not the elapsed time Ton has passed a predetermined time Tvo set in advance. Is determined. When the elapsed time Ton has passed the predetermined time Tvo, the process proceeds to step S50. If the elapsed time Ton has not passed the predetermined time Tvo, the process returns to step S40.

なお、図４は、本実施形態の電池パック２内に電池セル４から発生した可燃ガスが充満している状態から、吸気弁１２を閉弁し冷却ファン１０をオンにしたときの、電池パック２内の可燃性ガス濃度の推移を示している。図３に示すように、冷却ファン１０を作動させることで電池パック２内の可燃性ガスが排出されるが、吸気弁１２が閉弁しているので、電池パック２内に外気の流入が抑えられ、電池パック２内の可燃性ガス濃度が緩やかに低下する。そして、冷却ファン１０をオンにしてから、電池パック２内の可燃性ガス濃度が可燃濃度（発火燃焼する濃度）の下限値を下回る経過時間をあらかじめ計算あるいは実験等で確認しておき、当該経過時間を所定時間Ｔvoとすればよい。   4 shows the battery pack 2 when the intake valve 12 is closed and the cooling fan 10 is turned on from the state where the combustible gas generated from the battery cell 4 is filled in the battery pack 2 of the present embodiment. 2 shows the transition of combustible gas concentration. As shown in FIG. 3, the combustible gas in the battery pack 2 is discharged by operating the cooling fan 10. However, since the intake valve 12 is closed, the inflow of outside air into the battery pack 2 is suppressed. The combustible gas concentration in the battery pack 2 is gradually reduced. Then, after the cooling fan 10 is turned on, the elapsed time in which the flammable gas concentration in the battery pack 2 falls below the lower limit value of the flammable concentration (concentration for ignition and combustion) is confirmed in advance by calculation or experiment. The time may be set to a predetermined time Tvo.

ステップＳ６０では、吸気弁１２を開弁させる。そして、本ルーチンを終了する。
以上のように制御することで、本実施形態では、電池セル４の熱暴走時には吸気弁１２を閉弁した後に、冷却ファン１０を作動させる。これにより、熱暴走した電池セル４から可燃性ガスが発生し、電池パック２内に充満したとしても、電池パック２内の可燃性ガスが排出されるが、吸気弁１２が閉弁していることで、電池パック２内への空気の供給が抑えられ、電池パック２内で可燃性ガスが発火燃焼することを防止することができ、安全性を向上させることができる。 In step S60, the intake valve 12 is opened. Then, this routine ends.
By controlling as described above, in the present embodiment, the cooling fan 10 is operated after the intake valve 12 is closed during the thermal runaway of the battery cell 4. Thereby, even if flammable gas is generated from the battery cell 4 that has run out of heat and the battery pack 2 is filled, the flammable gas in the battery pack 2 is discharged, but the intake valve 12 is closed. As a result, the supply of air into the battery pack 2 can be suppressed, and the combustible gas can be prevented from igniting and burning in the battery pack 2, thereby improving safety.

そして、冷却ファン１０の作動により、電池パック２内の可燃性ガス濃度が徐々に低下し、可燃濃度の下限値よりも低下するに相当する時間経過してから、吸気弁１２が開弁するので、可燃性ガスの発火燃焼を防止した上で、吸気弁１２の開弁後に外気が多量に導入されて、電池セル４の冷却が推進され、更なる熱暴走を抑制することができる。
また、本実施形態では、排気口７と冷却ファン１０との間の排気ダクト８内に外気を導入する空気導入路９が設けられているので、電池セル４の熱暴走により電池パック２内の空気が高温となって排気口７から排出されても、空気導入路９から導入された外気と混合してから冷却ファン１０に到達するので、冷却ファン１０に到達する空気の温度を低下させ、冷却ファン１０を保護することができる。 Since the combustible gas concentration in the battery pack 2 gradually decreases due to the operation of the cooling fan 10 and the intake valve 12 is opened after a time corresponding to a decrease below the lower limit value of the combustible concentration, the valve opens. Further, after preventing the ignition and combustion of the combustible gas, a large amount of outside air is introduced after the intake valve 12 is opened, the cooling of the battery cell 4 is promoted, and further thermal runaway can be suppressed.
In the present embodiment, since the air introduction path 9 for introducing outside air is provided in the exhaust duct 8 between the exhaust port 7 and the cooling fan 10, Even if the air becomes hot and is discharged from the exhaust port 7, the air reaches the cooling fan 10 after being mixed with the outside air introduced from the air introduction path 9, so that the temperature of the air reaching the cooling fan 10 is lowered, The cooling fan 10 can be protected.

また、空気導入路９の開度を調節する調節弁１１が設けられており、当該調節弁１１の開度を調節することで空気導入路９から排気ダクト８内に導入される外気の量を調節することができる。そして、排気温度センサ１３から入力した排気温度に基づいて調節弁１１を作動制御することで、冷却ファン１０に到達する空気の温度を調整することが可能となる。図３に示すように、排気口７から排出された空気の温度が高温である場合には、調節弁１１の開度を大きくして、空気導入路９から導入さる外気の量を増加させ、冷却ファン１０に到達する空気の温度を十分に低下させることができる。また、排気口７から排出された空気の温度が低温である場合には、調節弁１１の開度を小さくして、空気導入路９から導入さる外気の量を減少させ、排気口７から吸い出す空気量を確保して、電池パック２内から可燃性ガスを効率よく排出することができる。   A control valve 11 for adjusting the opening degree of the air introduction path 9 is provided, and the amount of outside air introduced into the exhaust duct 8 from the air introduction path 9 is adjusted by adjusting the opening degree of the control valve 11. Can be adjusted. The temperature of the air reaching the cooling fan 10 can be adjusted by controlling the operation of the control valve 11 based on the exhaust temperature input from the exhaust temperature sensor 13. As shown in FIG. 3, when the temperature of the air exhausted from the exhaust port 7 is high, the opening degree of the control valve 11 is increased to increase the amount of outside air introduced from the air introduction path 9. The temperature of the air reaching the cooling fan 10 can be sufficiently reduced. Further, when the temperature of the air discharged from the exhaust port 7 is low, the opening degree of the control valve 11 is decreased to reduce the amount of outside air introduced from the air introduction path 9 and suck out from the exhaust port 7. The amount of air can be secured and the combustible gas can be efficiently discharged from the battery pack 2.

なお、本願発明は上記実施形態に限定されるものではない。
例えば、上記実施形態では、所定時間Ｔvoを電池パック２に対応した１つの設定値としているが複数設けてもよい。具体的には、ステップＳ２０において、電池セル４が熱暴走しているか判定する際に、熱暴走している電池セル４の個数を判定し、当該個数に応じて所定時間Ｔvoを変更すればよい。熱暴走している電池セル４の個数が多い場合には、可燃性ガスの発生量が多いことが予想されるので、吸気弁１２を閉弁し冷却ファン１０を作動させてからの経過時間を多くしなければ、電池パック２内の可燃性ガス濃度が可燃濃度の下限値を下回らない虞がある。したがって、熱暴走している電池セル４の個数が多いほど、所定時間Ｔvoを長くして、吸気弁１２を閉弁し冷却ファン１０を作動させてからの経過時間を増加させるように設定すればよい。 In addition, this invention is not limited to the said embodiment.
For example, in the above-described embodiment, the predetermined time Tvo is set as one set value corresponding to the battery pack 2, but a plurality of predetermined values may be provided. Specifically, when it is determined in step S20 whether the battery cell 4 is thermally runaway, the number of battery cells 4 that are thermally runaway is determined, and the predetermined time Tvo may be changed according to the number. . When the number of battery cells 4 that are thermally runaway is large, it is expected that the amount of combustible gas generated is large. Therefore, the elapsed time after the intake valve 12 is closed and the cooling fan 10 is operated is calculated. If not increased, the combustible gas concentration in the battery pack 2 may not fall below the lower limit of the combustible concentration. Therefore, as the number of battery cells 4 that are in thermal runaway increases, the predetermined time Tvo is lengthened, and the elapsed time after the intake valve 12 is closed and the cooling fan 10 is operated is increased. Good.

これにより、熱暴走している電池セル４の個数が多くとも、電池パック２内の可燃性ガス濃度が可燃濃度の下限値を下回った状態で冷却ファン１０を作動させることができ、冷却ファン１０作動時における可燃性ガスの発火燃焼を防止して、安全性を向上させることができる。また、熱暴走している電池セル４の個数が少ない場合に所定時間Ｔvoを極力短く設定することができ、熱暴走をより速やかに抑制することができる。   As a result, even if the number of battery cells 4 running out of heat is large, the cooling fan 10 can be operated in a state where the flammable gas concentration in the battery pack 2 is below the lower limit value of the flammable concentration. It is possible to improve safety by preventing ignition and combustion of combustible gas during operation. Further, when the number of battery cells 4 that are in thermal runaway is small, the predetermined time Tvo can be set as short as possible, and thermal runaway can be suppressed more quickly.

また、電池パック２へ導入する空気を外気だけでなく、車両の空調装置によって温調した空気を導入してもよい。また、電池パック２の形状や配置等の各種構造を適宜変更してもよい。本願発明は、走行駆動用モータへの電力供給用の電池以外でも適用可能であり、各種車両に搭載した電池や、その他電池を内蔵した電池パック内に空気を通過させて温調する温調装置に対して広く適用することができる。   Further, the air introduced into the battery pack 2 may be introduced not only outside air but also air whose temperature is adjusted by an air conditioner of the vehicle. Further, various structures such as the shape and arrangement of the battery pack 2 may be appropriately changed. The invention of the present application can be applied to a battery other than a battery for supplying power to the driving motor, and is a temperature control device that controls the temperature by allowing air to pass through batteries mounted in various vehicles and battery packs incorporating other batteries. Can be widely applied to.

１ 温調装置
２ 電池パック
４ 電池セル（電池）
６ 導入口
７ 排気口
８ 排気ダクト(空気通路)
９ 空気導入路
１０ 冷却ファン（送風機）
１１ 調節弁（調節器）
１２ 吸気弁（開閉器）
１３ 排気温度センサ
２０ セルマネジメントユニット（制御装置）
２１ 電池温度センサ（熱暴走検出器）
２２ 電圧センサ（熱暴走検出器） DESCRIPTION OF SYMBOLS 1 Temperature control apparatus 2 Battery pack 4 Battery cell (battery)
6 Introduction port 7 Exhaust port 8 Exhaust duct (air passage)
9 Air introduction path 10 Cooling fan (blower)
11 Control valve (regulator)
12 Intake valve (switch)
13 Exhaust temperature sensor 20 Cell management unit (control device)
21 Battery temperature sensor (thermal runaway detector)
22 Voltage sensor (thermal runaway detector)

Claims (6)

電池パックに備えられた導入口から排気口に空気を通過させて、前記電池パックに内蔵された電池を温調する電池の温調装置であって、
前記排気口から前記電池パック内の空気を吸い出す送風機と、
前記導入口を開閉する開閉器と、
前記電池の熱暴走を検出する熱暴走検出器と、
前記熱暴走検出器により前記電池の熱暴走が検出された際に、前記開閉器により前記導入口を閉口するとともに前記送風機による前記電池パック内からの空気の吸い出しを行い、前記開閉器による前記導入口の閉口及び前記送風機による吸い出し開始から所定時間経過した後に、前記導入口を開口させる制御装置と、
を備えたことを特徴とする電池の温調装置。 A battery temperature control device for controlling the temperature of a battery built in the battery pack by allowing air to pass from an introduction port provided in the battery pack to an exhaust port,
A blower for sucking out air in the battery pack from the exhaust port;
A switch for opening and closing the inlet;
A thermal runaway detector for detecting thermal runaway of the battery;
When the thermal runaway detector detects thermal runaway of the battery, the switch closes the introduction port and sucks out air from the battery pack by the blower, and the introduction by the switch A control device that opens the inlet after a predetermined time has elapsed from the closing of the mouth and the suction start by the blower;
A temperature control device for a battery, comprising: 前記電池パックは複数の前記電池を内蔵し、
前記熱暴走検出器は、複数の前記電池毎に熱暴走を検出し、
前記制御装置は、更に、前記熱暴走が検出された前記電池の個数が増加するに伴って、前記所定時間を増加させることを特徴とする請求項１に記載の電池の温調装置。 The battery pack includes a plurality of the batteries,
The thermal runaway detector detects thermal runaway for each of the plurality of batteries,
The battery control apparatus according to claim 1, wherein the controller further increases the predetermined time as the number of the batteries in which the thermal runaway is detected increases. 前記熱暴走検出器は、前記電池の温度に基づいて前記熱暴走を検出することを特徴とする請求項１または２に記載の電池の温調装置。   The battery temperature control device according to claim 1, wherein the thermal runaway detector detects the thermal runaway based on a temperature of the battery. 前記熱暴走検出器は、前記電池の電圧に基づいて前記熱暴走を検出することを特徴とする請求項１または２に記載の電池の温調装置。   The battery temperature control device according to claim 1, wherein the thermal runaway detector detects the thermal runaway based on a voltage of the battery. 前記電池パックの排気口と前記送風機との間の空気通路に空気を導入する空気導入路が設けられたことを特徴とする請求項１から４のいずれか１項に記載の電池の温調装置。   5. The temperature control device for a battery according to claim 1, further comprising an air introduction path for introducing air into an air passage between an exhaust port of the battery pack and the blower. . 前記排気口から排出される空気の温度を検出する排気温度検出器と、
前記空気導入路から前記空気通路に導入される空気量を調節する調節器と、を更に備え、
前記制御装置は、更に、前記排気温度検出器によって検出された前記空気の温度に基づいて、前記調節器による前記空気通路に導入される空気量の調節を行うことを特徴とする請求項５に記載の電池の温調装置。 An exhaust temperature detector for detecting the temperature of the air discharged from the exhaust port;
A regulator for adjusting the amount of air introduced from the air introduction path into the air passage,
6. The control device according to claim 5, wherein the controller further adjusts the amount of air introduced into the air passage by the regulator based on the temperature of the air detected by the exhaust gas temperature detector. The temperature control apparatus of the battery described.
JP2014139798A 2014-07-07 2014-07-07 Battery temperature control device Expired - Fee Related JP6350812B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014139798A JP6350812B2 (en) 2014-07-07 2014-07-07 Battery temperature control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014139798A JP6350812B2 (en) 2014-07-07 2014-07-07 Battery temperature control device

Publications (2)

Publication Number Publication Date
JP2016018637A true JP2016018637A (en) 2016-02-01
JP6350812B2 JP6350812B2 (en) 2018-07-04

Family

ID=55233731

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2014139798A Expired - Fee Related JP6350812B2 (en) 2014-07-07 2014-07-07 Battery temperature control device

Country Status (1)

Country Link
JP (1) JP6350812B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019032992A (en) * 2017-08-08 2019-02-28 トヨタ自動車株式会社 Battery pack
JP2020140814A (en) * 2019-02-27 2020-09-03 三洋電機株式会社 Temperature sensor, battery module and battery pack
CN113193261A (en) * 2021-04-26 2021-07-30 中国科学院广州能源研究所 Liquid-cooling fire-fighting combined management and control system and management and control method for lithium battery energy storage system
US11283121B1 (en) * 2019-11-27 2022-03-22 Zoox, Inc. Battery thermal mitigation using coolant
CN114348478A (en) * 2022-02-22 2022-04-15 广东能源集团科学技术研究院有限公司 Ground source temperature control type energy storage container
US11316230B1 (en) 2019-11-27 2022-04-26 Zoox, Inc. Battery thermal mitigation venting

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000059917A (en) * 1998-08-10 2000-02-25 Toyota Motor Corp Temperature adjuster for battery mounted on motor car
JP2002223507A (en) * 2001-01-26 2002-08-09 Toyota Motor Corp Power supply device for vehicle
JP2010192209A (en) * 2009-02-17 2010-09-02 Toshiba Corp Secondary battery and battery pack having the same
JP2010244918A (en) * 2009-04-08 2010-10-28 Toyota Motor Corp Temperature adjusting device for storage battery housing container
JP2011060755A (en) * 2009-09-12 2011-03-24 Tesla Motors Inc Active thermal runaway mitigation system for use within battery pack
JP2011065805A (en) * 2009-09-16 2011-03-31 Suzuki Motor Corp Device for charging battery system, and fire-extinguishing method of battery system
JP2012221646A (en) * 2011-04-06 2012-11-12 Panasonic Corp Electricity storage system
JP2013122844A (en) * 2011-12-09 2013-06-20 Toyota Industries Corp Battery temperature control mechanism
JP2013254664A (en) * 2012-06-07 2013-12-19 Hitachi Vehicle Energy Ltd Control device for secondary batteries
JP2016018638A (en) * 2014-07-07 2016-02-01 三菱自動車工業株式会社 Temperature control device of battery

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000059917A (en) * 1998-08-10 2000-02-25 Toyota Motor Corp Temperature adjuster for battery mounted on motor car
JP2002223507A (en) * 2001-01-26 2002-08-09 Toyota Motor Corp Power supply device for vehicle
JP2010192209A (en) * 2009-02-17 2010-09-02 Toshiba Corp Secondary battery and battery pack having the same
JP2010244918A (en) * 2009-04-08 2010-10-28 Toyota Motor Corp Temperature adjusting device for storage battery housing container
JP2011060755A (en) * 2009-09-12 2011-03-24 Tesla Motors Inc Active thermal runaway mitigation system for use within battery pack
JP2011065805A (en) * 2009-09-16 2011-03-31 Suzuki Motor Corp Device for charging battery system, and fire-extinguishing method of battery system
JP2012221646A (en) * 2011-04-06 2012-11-12 Panasonic Corp Electricity storage system
JP2013122844A (en) * 2011-12-09 2013-06-20 Toyota Industries Corp Battery temperature control mechanism
JP2013254664A (en) * 2012-06-07 2013-12-19 Hitachi Vehicle Energy Ltd Control device for secondary batteries
JP2016018638A (en) * 2014-07-07 2016-02-01 三菱自動車工業株式会社 Temperature control device of battery

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019032992A (en) * 2017-08-08 2019-02-28 トヨタ自動車株式会社 Battery pack
JP2020140814A (en) * 2019-02-27 2020-09-03 三洋電機株式会社 Temperature sensor, battery module and battery pack
JP7270414B2 (en) 2019-02-27 2023-05-10 三洋電機株式会社 Temperature sensors, battery modules and battery packs
US11283121B1 (en) * 2019-11-27 2022-03-22 Zoox, Inc. Battery thermal mitigation using coolant
US11316230B1 (en) 2019-11-27 2022-04-26 Zoox, Inc. Battery thermal mitigation venting
CN113193261A (en) * 2021-04-26 2021-07-30 中国科学院广州能源研究所 Liquid-cooling fire-fighting combined management and control system and management and control method for lithium battery energy storage system
CN114348478A (en) * 2022-02-22 2022-04-15 广东能源集团科学技术研究院有限公司 Ground source temperature control type energy storage container

Also Published As

Publication number Publication date
JP6350812B2 (en) 2018-07-04

Similar Documents

Publication Publication Date Title
JP6350812B2 (en) Battery temperature control device
JP6341371B2 (en) Battery temperature control device
JP6331017B2 (en) Battery cooling system
JP5082772B2 (en) Battery temperature control device
JP5168853B2 (en) Power system
CN107710547B (en) Charging device
JP2006244829A (en) Temperature control device and power source device
JP6992601B2 (en) Fuel cell system and method for deriving wind speed in fuel cell system
JP2015015151A (en) Battery temperature control device
JP6168032B2 (en) Fuel cell system
JP2007323810A (en) Secondary battery temperature regulator
JP2009129730A (en) Battery cooling device
KR102028919B1 (en) Battery pack
KR20130079763A (en) Battery cooling apparatus and operation method thereof
JP2011025812A (en) Vehicle, and method for regulating temperature of power storage device
JP2019021387A (en) Abnormality detection device
JP6164397B2 (en) Battery cooling system
JP2015104216A (en) Charging device
JP6181466B2 (en) Blower
JP2012054032A (en) Battery temperature control apparatus
JP2012250611A (en) Air conditioning device for fuel cell vehicle
JP2010257885A (en) Battery device
JP2014120457A (en) Power supply device
JP2015049999A (en) Cooling apparatus and power supply apparatus
JP2017165334A (en) Battery temperature regulation device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20170623

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20180412

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: 20180509

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20180522

R151 Written notification of patent or utility model registration

Ref document number: 6350812

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

LAPS Cancellation because of no payment of annual fees