WO2021070287A1 - Cooling device for on-board battery - Google Patents

Cooling device for on-board battery Download PDF

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Publication number
WO2021070287A1
WO2021070287A1 PCT/JP2019/039842 JP2019039842W WO2021070287A1 WO 2021070287 A1 WO2021070287 A1 WO 2021070287A1 JP 2019039842 W JP2019039842 W JP 2019039842W WO 2021070287 A1 WO2021070287 A1 WO 2021070287A1
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WO
WIPO (PCT)
Prior art keywords
battery
bottom frame
frame
cooling device
vehicle
Prior art date
Application number
PCT/JP2019/039842
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French (fr)
Japanese (ja)
Inventor
眞一 又野
健太郎 八田
直人 轟木
ホンソック キム
若林　計介
信也 秋月
裕司 岡本
雄祐 半田
山本　洋一
祐治 齋藤
Original Assignee
日産自動車株式会社
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Application filed by 日産自動車株式会社 filed Critical 日産自動車株式会社
Priority to PCT/JP2019/039842 priority Critical patent/WO2021070287A1/en
Priority to JP2021551007A priority patent/JP7456448B2/en
Publication of WO2021070287A1 publication Critical patent/WO2021070287A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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

Definitions

  • the present invention relates to an in-vehicle battery cooling device.
  • Patent Document 1 As a cooling device for an in-vehicle battery of this type, there is known a battery module assembly in which a coolant conduit for flowing a liquid coolant is provided along the outer surface of the battery module (Patent Document 1).
  • An object to be solved by the present invention is to provide an in-vehicle battery cooling device capable of suppressing battery failure due to water leakage.
  • the present invention solves the above problems by circulating a liquid refrigerant in a battery frame that is attached to the back of the floor of an automobile body and supports the battery in contact with the battery.
  • the cooling heat of the liquid refrigerant is transferred to the battery via the battery frame, while the liquid refrigerant cools the battery frame, so that the battery failure due to water leakage can be suppressed.
  • FIG. 1 It is a perspective view which shows the battery frame which comprises the cooling device of the vehicle-mounted battery of this invention. It is a perspective view which shows the state which the battery frame of FIG. 1 is attached to the underfloor of an automobile body. It is sectional drawing which follows the line III-III of FIG. It is sectional drawing along the IV-IV line of FIG. It is an enlarged cross-sectional view which shows the main part of the bottom frame of FIG. It is a block diagram which shows the refrigerant circulator of the cooling device of the vehicle-mounted battery of this invention.
  • FIG. 1 is a perspective view showing a battery frame constituting the vehicle-mounted battery cooling device of the present invention
  • FIG. 2 is a perspective view showing a state in which the battery frame of FIG. 1 is attached to the underfloor of an automobile body
  • FIG. 1 is a cross-sectional view taken along line III-III
  • FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 1
  • FIG. 5 is an enlarged cross-sectional view showing a main part of the bottom frame of FIG.
  • It is a block diagram which shows the refrigerant circulation device of the cooling device of the vehicle-mounted battery of this invention.
  • the vehicle-mounted battery cooling device 1 of the present embodiment is attached to the underfloor of the automobile body 2, has a battery frame 3 that contacts and supports the battery 4, and a refrigerant circulator that circulates liquid refrigerant in the battery frame 3. 5 and.
  • the battery frame 3 includes a plate-shaped bottom frame 31 and a plurality of plate-shaped side frames 32, 33, 34, 35 fixed to the outer peripheral portion of the bottom frame 31.
  • the side frames 32 to 35 of the present embodiment are composed of four members, but the present invention is not limited to this, and may be composed of less than four or five or more side frames.
  • the bottom frame 31 and the side frames 32 to 35 are not particularly limited, but can be made of an extruded product of aluminum. If the bottom frame 31 and the side frames 32 to 35 are made of an extruded aluminum product, the heat transfer property, the weight reduction, and the noise shielding property are improved. It will be excellent.
  • FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 1, showing a vertical cross section of the left and right side frames 32 and 33 of the battery frame 3 and the front and rear side frames 34 and 35.
  • the four side frame frames 32 to 35 basically all have the same hollow cross-sectional structure having ribs 321 partially.
  • the bottom frame 31 is formed into a single flat plate by welding and joining six sub-bottom frames 31A to 31F divided by dividing lines along the front-rear direction of the automobile body 2. That is, one sub-bottom frame is composed of one extruded product from the front end to the rear end of the bottom frame 31.
  • the bottom frame 31 has a hollow cross-sectional structure partially having ribs 314, and has an upper plate 311, a lower plate 312 facing the lower plate 312 via the hollow portion 313, and the hollow portion 313. It is a hollow plate-like frame having a rib 314 connecting the upper plate 311 and the lower plate 312 in the above.
  • FIG. 5 is an enlarged cross-sectional view showing a main part of the bottom frame 31, but since the bottom frame 31 is made of an extruded product, it has a cross-sectional structure shown in FIG. 5 from the front end to the rear end of the bottom frame 31. Has been done. Therefore, the flow path 51 is also formed from the front end to the rear end of the bottom frame 31.
  • the cooling heat of the liquid refrigerant flowing through the flow path 51 can be easily transferred to the upper plate 311.
  • the cooling heat of the liquid refrigerant can be prevented from escaping from the lower plate 312.
  • this flow path 51 is provided at a position close to the rib 314 of the hollow portion 313.
  • the flow path 51 is provided at a position close to one of the ribs 314 from the center of the two ribs 314. The strength of the flow path 51 can be ensured by providing the flow path 51 at a position close to the rib 314.
  • Two flow paths 51 are provided in each of the sub-bottom frames 31A and 31F located at both left and right ends, and three are provided in each of the other sub-bottom frames 31B to 31E. The details will be described later, but this is because the number of battery modules in contact with the sub-bottom frames 31A and 31F located at both left and right ends is smaller than the number of battery modules in contact with the other sub-bottom frames 31B to 31E.
  • the battery frame 3 shown in FIG. 1 four side frames 32 to 35 are fixed to the outer peripheral portion of the bottom frame 31 by welding or the like, and the battery 4 is the bottom frame 31 and the automobile body 2 facing the bottom frame 31.
  • the bottom frame 31 and the side frames 32 to 35 are housed in contact with at least one of them.
  • Reference numeral 36 shown in FIG. 1 is a partition plate fixed to the upper surface of the bottom frame 31 by welding or the like.
  • Battery 4 (also referred to as an assembled battery) includes a plurality of battery modules 41, and each battery module is housed in a rectangular parallelepiped module case. Although not shown, a plurality of thin batteries (also referred to as single batteries) are stored in a stacked state inside the module case. In the present embodiment, the plurality of battery modules 41 are arranged and fixed side by side on the surface of the bottom frame 31 so that each main surface 411 of the plurality of battery modules 41 is perpendicular to the surface of the bottom frame 31. The module.
  • the plurality of battery modules 41 are juxtaposed and fixed on the surface of the bottom frame 31 so that each side surface 412 of the plurality of battery modules 41 is in contact with the surface of the bottom frame 31.
  • the battery frame 3 of the present embodiment is attached over substantially the entire range from the front portion of the front floor panel 23 of the floor back surface 21 of the automobile body 2 to the rear floor panel 24.
  • Reference numeral 22 indicates a dash panel, and 25 indicates a sill.
  • the battery 4 shown in the lower left of the figure is mounted on the five compartments from the front partitioned by the partition plate 36, and the partition plate 36 partitions the battery frame 3.
  • a battery 4 in which a smaller amount of battery modules 41 are arranged is mounted in the rearmost section.
  • the refrigerant circulator 5 of the present embodiment includes a flow path 51 through which the liquid refrigerant flows, a pump 52 through which the liquid refrigerant flows, a cooler 53 for cooling the liquid refrigerant, and a refrigerant tank 54. ..
  • the refrigerant tank 54 is not an essential component for the refrigerant circulator 5.
  • the detailed configuration of the refrigerant circulator 5 of the present embodiment is shown in FIG.
  • an antifreeze liquid long life coolant LLC
  • the cooler 53 cools the liquid refrigerant composed of antifreeze by exchanging heat with the refrigerant in the cooling cycle 6 of the automobile air conditioner mounted on the automobile.
  • the compressor 63 that compresses the high-temperature vapor-phase refrigerant and the high-temperature and high-pressure vapor-phase refrigerant compressed by the compressor 63 are air-cooled by the fan 62 and condensed.
  • the compressor 61 is provided, and the evaporator 64 is provided with an evaporator 64 that adiabatically expands the low-temperature liquid-phase refrigerant condensed by the condenser 61 and exchanges heat with the air introduced into the vehicle interior.
  • the low-temperature liquid-phase refrigerant condensed by the condenser 61 of the cooling cycle 6 of the air conditioner for automobiles is branched from the upstream side of the evaporator 64 and introduced as a cooling heat source of the cooler 53. That is, the refrigerant inlet and outlet on the low temperature side of the cooler 53 are connected in parallel with the evaporator 64, and the inlet and outlet on the high temperature side are connected to the flow path 51.
  • the heated liquid refrigerant returned to the cooler 53 after heat exchange with the battery 4 in the bottom frame 31 can be cooled by heat exchange with the refrigerant in the cooling cycle 6 in the cooler 53.
  • reference numerals 67 and 68 indicate check valves.
  • the liquid refrigerant cooled by the cooler 53 is stored in the refrigerant tank 54 and then sucked by the pump 52, and is sucked by the pump 52 from the flow path 51 downstream of the pump 52.
  • the guide is branched into eight flow paths 51 provided in the above.
  • the liquid refrigerant that has flowed down each of these eight flow paths 51 is once aggregated in one flow path 51, and then branched again and guided to the eight flow paths 51 provided in the sub-bottom frames 31D, 31E, and 31F.
  • the liquid refrigerant flowing down each of these eight flow paths 51 is collected in one flow path 51 and then guided to the cooler 53.
  • the flow paths 51 provided in the sub-bottom frames 31A to 31F are through holes, but the other flow paths 51 are composed of pipes.
  • the flow paths 51 provided in the sub-bottom frames 31A to 31F are provided side by side along the extending direction of the sub-bottom frames 31A to 31F, that is, the front-rear direction of the automobile body 2.
  • the sub-bottom frames 31A and 31F located at both left and right ends are each provided with two flow paths 51
  • the other sub-bottom frames 31B to 31E are each provided with three flow paths 51. Has been done. This is because the number of battery modules in contact with the sub-bottom frames 31A and 31F located at both left and right ends is smaller than the number of battery modules in contact with the other sub-bottom frames 31B to 31E.
  • the battery 4 shown in the lower left of the figure is mounted on the five compartments from the front partitioned by the partition plate 36, and is partitioned by the partition plate 36.
  • a battery 4 in which a smaller amount of battery modules 41 are arranged is mounted in the rearmost section. That is, since the rear ends of the sub-bottom frames 31A and 31F extend only to the front end of the rearmost section partitioned by the partition plate 36, the number of battery modules 41 to be cooled by the sub-bottom frames 31A and 31F Is smaller than the other sub-bottom frames 31B to 31E by the number of battery modules 41 corresponding to the left and right ends of the rearmost section partitioned by the partition plate 36.
  • the number of flow paths 51 provided in the sub-bottom frames 31A and 31F located at both left and right ends is set to two for each of the other three sub-bottom frames 31B to 31E.
  • the layout of the plurality of flow paths 51, specifically, the number of flow paths 51 is set so that the number of battery modules 41 facing each other in one flow path is equal to each other.
  • the battery frame 3 configured in this way is attached to the floor back surface 21 of the automobile body 2 by using a plurality of brackets 37 after closing the upper surface with the cover 38.
  • the left and right sides of the battery frame 3 are attached to the sill inner panel 251 or the sill outer panel 252 of the sill 25, and the front end edge and the rear end edge are attached to the front floor panel or the rear floor panel.
  • the battery frame 3 which is attached to the floor back surface 21 of the automobile body 2 and which contacts and supports the battery 4 and the liquid in the battery frame 3 Since the refrigerant circulator 5 for circulating the refrigerant is provided, the cooling heat of the liquid refrigerant is transferred to the battery 4 via the battery frame 3. On the other hand, since the liquid refrigerant cools the battery frame 3 and does not come into contact with the battery 4, failure of the battery 4 due to water leakage can be suppressed.
  • the battery frame 3 includes at least a plate-shaped bottom frame 31, and the battery 4 includes the bottom frame 31 and the floor back surface 21 of the automobile body 2 facing the bottom frame 31. It is stored in the space between the two and the bottom frame 31 in contact with the bottom frame 31.
  • the battery frame 3 includes a plate-shaped bottom frame 31 and a plurality of plate-shaped side frames 32 to 35 fixed to the outer peripheral portion of the bottom frame 31. In a space surrounded by the bottom frame 31, the floor back surface 21 of the automobile body 2 facing the bottom frame 31, and the plurality of side frames 32 to 35, the battery 4 includes the bottom frame 31 and the side frames 32 to 35.
  • the refrigerant circulator 5 includes a flow path 51 through which the liquid refrigerant flows, a pump 52 through which the liquid refrigerant flows, and a cooler 53 for cooling the liquid refrigerant. Since the battery 4 is in contact with the bottom frame 31 and a part of the flow path 51 is provided in the bottom frame 31, the heat of cooling by the liquid refrigerant of the refrigerant circulator 5 is transmitted through the bottom frame 31 of the battery frame 3. It is transmitted to the battery 4. On the other hand, since the liquid refrigerant in the refrigerant circulator 5 cools the bottom frame 31 of the battery frame 3 and does not come into contact with the battery 4, failure of the battery 4 due to water leakage can be suppressed.
  • the bottom frame 31 has an upper plate 311 and a lower plate 312 facing the upper plate 313 via the hollow portion 313, and the upper plate 311 and the lower plate in the hollow portion 313. It is a hollow plate-shaped frame having ribs 314 connecting 312, and the flow path 51 is provided at a position in contact with the upper plate 311 of the hollow portion 313. As a result, the cooling heat of the liquid refrigerant flowing through the flow path 51 is easily transmitted to the upper plate 311. On the other hand, by not contacting the flow path 51 with the lower plate 312 and interposing the air in the hollow portion 313, the cooling heat of the liquid refrigerant can be prevented from escaping from the lower plate 312.
  • the flow path 51 is provided at a position close to the rib 314 of the hollow portion 313, the strength of the flow path 51 can be ensured.
  • the battery 4 includes a plurality of battery modules 41, and each battery module 41 is housed in a rectangular module case, and each of the plurality of battery modules 41 is housed in a rectangular module case.
  • a plurality of battery modules 41 are arranged side by side on the surface of the bottom frame 31 so that the main surface 411 is perpendicular to the surface of the bottom frame 31.
  • the plurality of battery modules 41 are juxtaposed and fixed on the surface of the bottom frame 31 so that each side surface 412 of the plurality of battery modules 41 is in contact with the surface of the bottom frame 31.
  • the flow path 51 is composed of a plurality of flow paths 51 provided side by side along the extending direction of the bottom frame 31, and the flow paths 51 face each other.
  • the layout of the plurality of flow paths 51 is set so that the number of modules 41 is the same. As a result, uneven distribution of cooling performance can be suppressed, and a plurality of battery modules 41 can be cooled evenly.
  • the example in which the battery module 41 comes into contact with the bottom frame 31 is shown, but instead or in addition to this, all or part of the battery module 41 is at least at least the side frames 32 to 35. You may contact either.
  • Cooling device 2 ... Automotive body 21 ... Floor back surface 22 ... Dash panel 23 ... Front floor panel 24 ... Rear floor panel 25 ... Sill 3 ... Battery frame 31 ... Bottom frame 31A, 31B, 31C, 31D, 31E, 31F ... Sub bottom surface Frame 311 ... Upper plate 312 ... Lower plate 313 ... Hollow part 314 ... Rib 32, 33, 34, 35 ... Side frame 321 ... Rib 36 ... Partition plate 37 ... Bracket 38 ... Cover 4 ... Battery 41 ... Battery module 411 ... Main surface 412 ... Side 5 ... Refrigerant circulator 51 ... Flow path 52 ... Pump 53 ... Cooler 54 ... Refrigerant tank 6 ... Cooling cycle 61 ... Condenser 62 ... Fan 63 ... Compressor 64 ... Evaporator 65 ... Refrigerant piping 66 ... Three-way valve 67,68 ...Check valve

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Secondary Cells (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The present invention is provided with: a battery frame (3) that is attached to a floor rear surface (21) of a vehicle body (2) and that contacts and supports a battery (4); and a refrigerant circulator (5) that circulates a liquid refrigerant to the battery frame. The battery frame includes a plate-shaped bottom-surface frame (31) and a plurality of plate-shaped side-surface frames (32-35) fixed to an outer peripheral part of the bottom-surface frame. The battery is housed in a space enclosed by the bottom-surface frame, the floor rear surface of the vehicle body, and a plurality of side surface frames, the floor rear surface facing the bottom-surface frame, and the battery contacting at least one of the side-surface frames and the bottom-surface frame.

Description

車載バッテリの冷却装置In-vehicle battery cooling device
　本発明は、車載バッテリの冷却装置に関するものである。 The present invention relates to an in-vehicle battery cooling device.
　この種の車載バッテリの冷却装置として、液体冷却剤を流すための冷却剤導管を、バッテリモジュールの外面に沿って設けたバッテリモジュールアッセンブリが知られている（特許文献１）。 As a cooling device for an in-vehicle battery of this type, there is known a battery module assembly in which a coolant conduit for flowing a liquid coolant is provided along the outer surface of the battery module (Patent Document 1).
特許第５４３１４８６号公報Japanese Patent No. 5431486
　しかしながら、上記従来技術では、液体冷媒がバッテリモジュールの外面に沿って設けられているので、漏水によるバッテリ故障の可能性は否めない。 However, in the above-mentioned conventional technique, since the liquid refrigerant is provided along the outer surface of the battery module, the possibility of battery failure due to water leakage cannot be denied.
　本発明が解決しようとする課題は、漏水によるバッテリ故障を抑制できる車載バッテリの冷却装置を提供することである。 An object to be solved by the present invention is to provide an in-vehicle battery cooling device capable of suppressing battery failure due to water leakage.
　本発明は、自動車ボディの床裏に取り付けられ、バッテリに接触して支持するバッテリフレームに、液体冷媒を循環させることによって上記課題を解決する。 The present invention solves the above problems by circulating a liquid refrigerant in a battery frame that is attached to the back of the floor of an automobile body and supports the battery in contact with the battery.
　本発明によれば、液体冷媒による冷却熱はバッテリフレームを介してバッテリに伝えられる一方で、液体冷媒はバッテリフレームを冷却するので、漏水によるバッテリの故障が抑制できる。 According to the present invention, the cooling heat of the liquid refrigerant is transferred to the battery via the battery frame, while the liquid refrigerant cools the battery frame, so that the battery failure due to water leakage can be suppressed.
本発明の車載バッテリの冷却装置を構成するバッテリフレームを示す斜視図である。It is a perspective view which shows the battery frame which comprises the cooling device of the vehicle-mounted battery of this invention. 図1のバッテリフレームを自動車ボディの床裏に取り付けた状態を示す斜視図である。It is a perspective view which shows the state which the battery frame of FIG. 1 is attached to the underfloor of an automobile body. 図1のIII-III線に沿う断面図である。It is sectional drawing which follows the line III-III of FIG. 図1のIV-IV線に沿う断面図である。It is sectional drawing along the IV-IV line of FIG. 図３の底面フレームの要部を示す拡大断面図である。It is an enlarged cross-sectional view which shows the main part of the bottom frame of FIG. 本発明の車載バッテリの冷却装置の冷媒循環器を示す構成図である。It is a block diagram which shows the refrigerant circulator of the cooling device of the vehicle-mounted battery of this invention.
　以下、本発明の実施形態を図面に基づいて説明する。図１は、本発明の車載バッテリの冷却装置を構成するバッテリフレームを示す斜視図、図２は、図1のバッテリフレームを自動車ボディの床裏に取り付けた状態を示す斜視図、図３は、図1のIII-III線に沿う断面図、図４は、図1のIV-IV線に沿う断面図、図５は、図３の底面フレームの要部を示す拡大断面図、図６は、本発明の車載バッテリの冷却装置の冷媒循環器を示す構成図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a battery frame constituting the vehicle-mounted battery cooling device of the present invention, FIG. 2 is a perspective view showing a state in which the battery frame of FIG. 1 is attached to the underfloor of an automobile body, and FIG. 1 is a cross-sectional view taken along line III-III, FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 1, FIG. 5 is an enlarged cross-sectional view showing a main part of the bottom frame of FIG. It is a block diagram which shows the refrigerant circulation device of the cooling device of the vehicle-mounted battery of this invention.
　本実施形態の車載バッテリの冷却装置１は、自動車ボディ２の床裏に取り付けられ、バッテリ４に接触してこれを支持するバッテリフレーム３と、このバッテリフレーム３に液体冷媒を循環させる冷媒循環器５と、を備える。 The vehicle-mounted battery cooling device 1 of the present embodiment is attached to the underfloor of the automobile body 2, has a battery frame 3 that contacts and supports the battery 4, and a refrigerant circulator that circulates liquid refrigerant in the battery frame 3. 5 and.
　バッテリフレーム３は、図１に示すように、板状の底面フレーム３１と、この底面フレーム３１の外周部に固定された複数の板状の側面フレーム３２，３３，３４，３５と、を含む。本実施形態の側面フレーム３２～３５は、４つの部材で構成されているが、これに限定されず、４つ未満又は５つ以上の側面フレームで構成してもよい。これら底面フレーム３１及び側面フレーム３２～３５は、特に限定はされないが、アルミニウムの押出成形品で構成することができ、アルミニウムの押出成形品で構成すれば、伝熱性、軽量化、ノイズ遮蔽性に優れたものとなる。 As shown in FIG. 1, the battery frame 3 includes a plate-shaped bottom frame 31 and a plurality of plate- shaped side frames 32, 33, 34, 35 fixed to the outer peripheral portion of the bottom frame 31. The side frames 32 to 35 of the present embodiment are composed of four members, but the present invention is not limited to this, and may be composed of less than four or five or more side frames. The bottom frame 31 and the side frames 32 to 35 are not particularly limited, but can be made of an extruded product of aluminum. If the bottom frame 31 and the side frames 32 to 35 are made of an extruded aluminum product, the heat transfer property, the weight reduction, and the noise shielding property are improved. It will be excellent.
　図４は、図1のIV-IV線に沿う断面図であって、バッテリフレーム３の左右の側面フレーム３２，３３と、前後の側面フレーム３４，３５の縦断面を示す。同図に示すように、４つの側面フレーム３２～３５は、基本的にはいずれも同様の、部分的にリブ３２１を有する中空形状の断面構造とされている。側面フレーム３２～３５を、部分的にリブ３２１を有する中空形状の断面構造とすることで、軽量化を図りつつ一定の強度を確保することができる。 FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 1, showing a vertical cross section of the left and right side frames 32 and 33 of the battery frame 3 and the front and rear side frames 34 and 35. As shown in the figure, the four side frame frames 32 to 35 basically all have the same hollow cross-sectional structure having ribs 321 partially. By forming the side frames 32 to 35 into a hollow cross-sectional structure having ribs 321 partially, it is possible to secure a certain strength while reducing the weight.
　底面フレーム３１は、自動車ボディ２の前後方向に沿う分割線で分割された６つのサブ底面フレーム３１Ａ～３１Ｆを溶接接合することで、１枚の平板に形成されている。すなわち、１枚のサブ底面フレームは、底面フレーム３１の前端から後端まで一つの押出成形品で構成されている。底面フレーム３１は、図５に示すように、部分的にリブ３１４を有する中空形状の断面構造とされ、アッパプレート３１１と、中空部３１３を介してこれに対面するロアプレート３１２と、中空部３１３においてアッパプレート３１１とロアプレート３１２を繋ぐリブ３１４と、を有する中空板状のフレームである。 The bottom frame 31 is formed into a single flat plate by welding and joining six sub-bottom frames 31A to 31F divided by dividing lines along the front-rear direction of the automobile body 2. That is, one sub-bottom frame is composed of one extruded product from the front end to the rear end of the bottom frame 31. As shown in FIG. 5, the bottom frame 31 has a hollow cross-sectional structure partially having ribs 314, and has an upper plate 311, a lower plate 312 facing the lower plate 312 via the hollow portion 313, and the hollow portion 313. It is a hollow plate-like frame having a rib 314 connecting the upper plate 311 and the lower plate 312 in the above.
　特に本実施形態の底面フレーム３１においては、図５に示すように、冷媒循環器５の流路５１の一部が、中空部３１３のアッパプレート３１１に接する位置に設けられている。図５は、底面フレーム３１の要部を示す拡大断面図であるが、底面フレーム３１は押出成形品で構成されていることから、底面フレーム３１の前端から後端まで図５に示す断面構造とされている。したがって、流路５１も底面フレーム３１の前端から後端まで形成されている。流路５１を中空部３１３のアッパプレート３１１に接する位置に設けることで、流路５１を流れる液体冷媒の冷却熱がアッパプレート３１１に伝わり易くなる。一方において、流路５１をロアプレート３１２に接触させず、中空部３１３の空気を介在させることにより、液体冷媒の冷却熱をロアプレート３１２から逃がさないようにすることができる。 In particular, in the bottom frame 31 of the present embodiment, as shown in FIG. 5, a part of the flow path 51 of the refrigerant circulator 5 is provided at a position in contact with the upper plate 311 of the hollow portion 313. FIG. 5 is an enlarged cross-sectional view showing a main part of the bottom frame 31, but since the bottom frame 31 is made of an extruded product, it has a cross-sectional structure shown in FIG. 5 from the front end to the rear end of the bottom frame 31. Has been done. Therefore, the flow path 51 is also formed from the front end to the rear end of the bottom frame 31. By providing the flow path 51 at a position in contact with the upper plate 311 of the hollow portion 313, the cooling heat of the liquid refrigerant flowing through the flow path 51 can be easily transferred to the upper plate 311. On the other hand, by not contacting the flow path 51 with the lower plate 312 and interposing the air in the hollow portion 313, the cooling heat of the liquid refrigerant can be prevented from escaping from the lower plate 312.
　またこの流路５１は、中空部３１３のリブ３１４に近接する位置に設けられている。換言すれば、流路５１は、２つのリブ３１４の中央からいずれか一方のリブ３１４に近接する位置に設けられている。流路５１をリブ３１４に近接する位置に設けることで流路５１の強度を確保することができる。 Further, this flow path 51 is provided at a position close to the rib 314 of the hollow portion 313. In other words, the flow path 51 is provided at a position close to one of the ribs 314 from the center of the two ribs 314. The strength of the flow path 51 can be ensured by providing the flow path 51 at a position close to the rib 314.
　流路５１は、左右の両端に位置するサブ底面フレーム３１Ａ，３１Ｆにそれぞれ２本設けられ、その他のサブ底面フレーム３１Ｂ～３１Ｅにそれぞれ３本設けられている。詳細は後述するが、左右の両端に位置するサブ底面フレーム３１Ａ，３１Ｆに接するバッテリモジュールの数量が、その他のサブ底面フレーム３１Ｂ～３１Ｅに接するバッテリモジュールの数量より少ないからである。 Two flow paths 51 are provided in each of the sub-bottom frames 31A and 31F located at both left and right ends, and three are provided in each of the other sub-bottom frames 31B to 31E. The details will be described later, but this is because the number of battery modules in contact with the sub-bottom frames 31A and 31F located at both left and right ends is smaller than the number of battery modules in contact with the other sub-bottom frames 31B to 31E.
　図１に示すバッテリフレーム３は、底面フレーム３１の外周部に、溶接接合などによって４つの側面フレーム３２～３５が固定されてなり、バッテリ４は、底面フレーム３１と、これに対面する自動車ボディ２の床裏面２１と、４つの側面フレーム３２～３５とで囲まれた空間に、底面フレーム３１及び側面フレーム３２～３５の少なくとも一方に接触した状態で収納される。図１に示す符号３６は、底面フレーム３１の上面に溶接接合などにより固定された仕切り板である。 In the battery frame 3 shown in FIG. 1, four side frames 32 to 35 are fixed to the outer peripheral portion of the bottom frame 31 by welding or the like, and the battery 4 is the bottom frame 31 and the automobile body 2 facing the bottom frame 31. In the space surrounded by the floor back surface 21 and the four side frames 32 to 35, the bottom frame 31 and the side frames 32 to 35 are housed in contact with at least one of them. Reference numeral 36 shown in FIG. 1 is a partition plate fixed to the upper surface of the bottom frame 31 by welding or the like.
　バッテリ４（組電池とも称される）は、複数のバッテリモジュール４１を含み、それぞれのバッテリモジュールは、直方体状のモジュールケースに収納されている。図示は省略するが、モジュールケースの内部には、複数の薄型電池（単電池とも称される）が積層した状態で収納されている。本実施形態においては、複数のバッテリモジュール４１の各主面４１１が、底面フレーム３１の面に垂直になるように、複数のバッテリモジュール４１が、底面フレーム３１の面上に並設されて固定される。 Battery 4 (also referred to as an assembled battery) includes a plurality of battery modules 41, and each battery module is housed in a rectangular parallelepiped module case. Although not shown, a plurality of thin batteries (also referred to as single batteries) are stored in a stacked state inside the module case. In the present embodiment, the plurality of battery modules 41 are arranged and fixed side by side on the surface of the bottom frame 31 so that each main surface 411 of the plurality of battery modules 41 is perpendicular to the surface of the bottom frame 31. The module.
　換言すれば、複数のバッテリモジュール４１の各側面４１２が、底面フレーム３１の面に接するように、複数のバッテリモジュール４１が、底面フレーム３１の面上に並設されて固定される。このように複数のバッテリモジュール４１を縦にして並べることで、全てのバッテリモジュール４１を底面フレーム３１に接触させることができ、全てのバッテリモジュール４１を万遍なく冷却することができる。 In other words, the plurality of battery modules 41 are juxtaposed and fixed on the surface of the bottom frame 31 so that each side surface 412 of the plurality of battery modules 41 is in contact with the surface of the bottom frame 31. By arranging the plurality of battery modules 41 vertically in this way, all the battery modules 41 can be brought into contact with the bottom frame 31, and all the battery modules 41 can be cooled evenly.
　本実施形態のバッテリフレーム３は、図２に示すように、自動車ボディ２の床裏面２１のフロントフロアパネル２３の前部からリヤフロアパネル２４に至る範囲の、ほぼ全面にわたって取り付けられる。なお、符号２２はダッシュパネル、２５はシルをそれぞれ示す。そして、本実施形態のバッテリフレーム３においては、図１に示すように、仕切り板３６で仕切られた前方から５つの区画には同図の左下に示すバッテリ４が搭載され、仕切り板３６で仕切られた最後方の区画には、それより少量のバッテリモジュール４１が並べられたバッテリ４が搭載される。 As shown in FIG. 2, the battery frame 3 of the present embodiment is attached over substantially the entire range from the front portion of the front floor panel 23 of the floor back surface 21 of the automobile body 2 to the rear floor panel 24. Reference numeral 22 indicates a dash panel, and 25 indicates a sill. Then, in the battery frame 3 of the present embodiment, as shown in FIG. 1, the battery 4 shown in the lower left of the figure is mounted on the five compartments from the front partitioned by the partition plate 36, and the partition plate 36 partitions the battery frame 3. A battery 4 in which a smaller amount of battery modules 41 are arranged is mounted in the rearmost section.
　本実施形態の冷媒循環器５は、図１に示すように、液体冷媒が流れる流路５１と、液体冷媒を流すポンプ５２と、液体冷媒を冷却する冷却器５３と、冷媒タンク５４とを含む。なお、冷媒タンク５４は、冷媒循環器５にとって必須の部品ではない。本実施形態の冷媒循環器５の詳細な構成を図６に示す。本実施形態の液体冷媒としては、エチレングリコールを主成分とする不凍液（ロングライフクーラントＬＬＣ）などを用いることができる。また冷却器５３は、自動車に搭載された自動車用空気調和装置の冷房サイクル６の冷媒との間で熱交換することで、不凍液からなる液体冷媒を冷却する。 As shown in FIG. 1, the refrigerant circulator 5 of the present embodiment includes a flow path 51 through which the liquid refrigerant flows, a pump 52 through which the liquid refrigerant flows, a cooler 53 for cooling the liquid refrigerant, and a refrigerant tank 54. .. The refrigerant tank 54 is not an essential component for the refrigerant circulator 5. The detailed configuration of the refrigerant circulator 5 of the present embodiment is shown in FIG. As the liquid refrigerant of the present embodiment, an antifreeze liquid (long life coolant LLC) containing ethylene glycol as a main component can be used. Further, the cooler 53 cools the liquid refrigerant composed of antifreeze by exchanging heat with the refrigerant in the cooling cycle 6 of the automobile air conditioner mounted on the automobile.
　すなわち、図６に示す自動車用空気調和装置の冷房サイクル６は、高温の気相冷媒を圧縮するコンプレッサ６３と、コンプレッサ６３により圧縮された高温・高圧の気相冷媒をファン６２により空冷して凝縮させるコンデンサ６１と、コンデンサ６１により凝縮された低温の液相冷媒を断熱膨張させて、車室内に導入される空気と熱交換させるエバポレータ６４と、を備える。 That is, in the cooling cycle 6 of the automobile air conditioner shown in FIG. 6, the compressor 63 that compresses the high-temperature vapor-phase refrigerant and the high-temperature and high-pressure vapor-phase refrigerant compressed by the compressor 63 are air-cooled by the fan 62 and condensed. The compressor 61 is provided, and the evaporator 64 is provided with an evaporator 64 that adiabatically expands the low-temperature liquid-phase refrigerant condensed by the condenser 61 and exchanges heat with the air introduced into the vehicle interior.
　そして、本実施形態では、この自動車用空気調和装置の冷房サイクル６のコンデンサ６１により凝縮された低温の液相冷媒を、エバポレータ６４の上流側から分岐して冷却器５３の冷却熱源として導入する。すなわち、冷却器５３の低温側の冷媒入口及び出口をエバポレータ６４と並列に接続し、高温側の入口及び出口を流路５１に接続している。これにより、底面フレーム３１でバッテリ４と熱交換したのちに冷却器５３に戻される昇温した液体冷媒を、冷却器５３で冷房サイクル６の冷媒と熱交換させて冷却することができる。なお、図６において、符号６７，６８は逆止弁を示す。 Then, in the present embodiment, the low-temperature liquid-phase refrigerant condensed by the condenser 61 of the cooling cycle 6 of the air conditioner for automobiles is branched from the upstream side of the evaporator 64 and introduced as a cooling heat source of the cooler 53. That is, the refrigerant inlet and outlet on the low temperature side of the cooler 53 are connected in parallel with the evaporator 64, and the inlet and outlet on the high temperature side are connected to the flow path 51. As a result, the heated liquid refrigerant returned to the cooler 53 after heat exchange with the battery 4 in the bottom frame 31 can be cooled by heat exchange with the refrigerant in the cooling cycle 6 in the cooler 53. In FIG. 6, reference numerals 67 and 68 indicate check valves.
　図６に示すように、冷却器５３で冷却された液体冷媒は、冷媒タンク５４に貯留されたのちポンプ５２により吸引され、ポンプ５２の下流の流路５１から、サブ底面フレーム３１Ａ，３１Ｂ，３１Ｃに設けられた８つの流路５１に分岐して案内される。これら８つの流路５１をそれぞれ流下した液体冷媒は、一旦１つの流路５１に集約されたのち、サブ底面フレーム３１Ｄ，３１Ｅ，３１Ｆに設けられた８つの流路５１に再び分岐して案内される。そして、これら８つの流路５１をそれぞれ流下した液体冷媒は、1つの流路５１に集約されたのち冷却器５３に案内される。なお、サブ底面フレーム３１Ａ～３１Ｆに設けられた流路５１は、通孔であるが、その他の流路５１は配管により構成されている。 As shown in FIG. 6, the liquid refrigerant cooled by the cooler 53 is stored in the refrigerant tank 54 and then sucked by the pump 52, and is sucked by the pump 52 from the flow path 51 downstream of the pump 52. The guide is branched into eight flow paths 51 provided in the above. The liquid refrigerant that has flowed down each of these eight flow paths 51 is once aggregated in one flow path 51, and then branched again and guided to the eight flow paths 51 provided in the sub-bottom frames 31D, 31E, and 31F. To. Then, the liquid refrigerant flowing down each of these eight flow paths 51 is collected in one flow path 51 and then guided to the cooler 53. The flow paths 51 provided in the sub-bottom frames 31A to 31F are through holes, but the other flow paths 51 are composed of pipes.
　本実施形態において、サブ底面フレーム３１Ａ～３１Ｆに設けられた流路５１は、これらサブ底面フレーム３１Ａ～３１Ｆの延在方向、すなわち自動車ボディ２の前後方向に沿って並んで設けられている。具体的には、左右の両端に位置するサブ底面フレーム３１Ａ，３１Ｆには、それぞれ２本の流路５１設けられ、その他のサブ底面フレーム３１Ｂ～３１Ｅには、それぞれ３本の流路５１が設けられている。これは、左右の両端に位置するサブ底面フレーム３１Ａ，３１Ｆに接するバッテリモジュールの数量が、その他のサブ底面フレーム３１Ｂ～３１Ｅに接するバッテリモジュールの数量より少ないからである。 In the present embodiment, the flow paths 51 provided in the sub-bottom frames 31A to 31F are provided side by side along the extending direction of the sub-bottom frames 31A to 31F, that is, the front-rear direction of the automobile body 2. Specifically, the sub-bottom frames 31A and 31F located at both left and right ends are each provided with two flow paths 51, and the other sub-bottom frames 31B to 31E are each provided with three flow paths 51. Has been done. This is because the number of battery modules in contact with the sub-bottom frames 31A and 31F located at both left and right ends is smaller than the number of battery modules in contact with the other sub-bottom frames 31B to 31E.
　本実施形態のバッテリフレーム３においては、図１に示すように、仕切り板３６で仕切られた前方から５つの区画には同図の左下に示すバッテリ４が搭載され、仕切り板３６で仕切られた最後方の区画には、それより少量のバッテリモジュール４１が並べられたバッテリ４が搭載される。つまり、サブ底面フレーム３１Ａ，３１Ｆの後端は、仕切り板３６で仕切られた最後方の区画の前端までしか延在していないので、サブ底面フレーム３１Ａ，３１Ｆで冷却すべきバッテリモジュール４１の数量は、その他のサブ底面フレーム３１Ｂ～３１Ｅに比べ、仕切り板３６で仕切られた最後方の区画の左右の両端に相当するバッテリモジュール４１の数量だけ少ない。そのため、左右の両端に位置するサブ底面フレーム３１Ａ，３１Ｆに設ける流路５１の本数を、その他のサブ底面フレーム３１Ｂ～３１Ｅの３本に対してそれぞれ２本としている。要するに、１本の流路が対面するバッテリモジュール４１の数量が互いに同等になるように、複数の流路５１のレイアウト、具体的には流路５１の本数が設定されている。 In the battery frame 3 of the present embodiment, as shown in FIG. 1, the battery 4 shown in the lower left of the figure is mounted on the five compartments from the front partitioned by the partition plate 36, and is partitioned by the partition plate 36. In the rearmost section, a battery 4 in which a smaller amount of battery modules 41 are arranged is mounted. That is, since the rear ends of the sub-bottom frames 31A and 31F extend only to the front end of the rearmost section partitioned by the partition plate 36, the number of battery modules 41 to be cooled by the sub-bottom frames 31A and 31F Is smaller than the other sub-bottom frames 31B to 31E by the number of battery modules 41 corresponding to the left and right ends of the rearmost section partitioned by the partition plate 36. Therefore, the number of flow paths 51 provided in the sub-bottom frames 31A and 31F located at both left and right ends is set to two for each of the other three sub-bottom frames 31B to 31E. In short, the layout of the plurality of flow paths 51, specifically, the number of flow paths 51 is set so that the number of battery modules 41 facing each other in one flow path is equal to each other.
　このように構成されたバッテリフレーム３は、図３に示すように、カバー３８にて上面を閉塞したのち、複数のブラケット３７を用いて、自動車ボディ２の床裏面２１に取り付けられる。具体的には、バッテリフレーム３の左右辺は、同図に示すように、シル２５のシルインナパネル２５１またはシルアウタパネル２５２に取り付けられ、前端辺と後端辺は、フロントフロアパネル又はリヤフロアパネルに直接または間接的に取り付けられる。 As shown in FIG. 3, the battery frame 3 configured in this way is attached to the floor back surface 21 of the automobile body 2 by using a plurality of brackets 37 after closing the upper surface with the cover 38. Specifically, as shown in the figure, the left and right sides of the battery frame 3 are attached to the sill inner panel 251 or the sill outer panel 252 of the sill 25, and the front end edge and the rear end edge are attached to the front floor panel or the rear floor panel. Can be installed directly or indirectly.
　以上のとおり、本実施形態の車載バッテリの冷却装置１によれば、自動車ボディ２の床裏面２１に取り付けられ、バッテリ４に接触してこれを支持するバッテリフレーム３と、このバッテリフレーム３に液体冷媒を循環させる冷媒循環器５と、を備えるので、液体冷媒による冷却熱はバッテリフレーム３を介してバッテリ４に伝えられる。一方において、液体冷媒はバッテリフレーム３を冷却し、バッテリ４には接しないので、漏水によるバッテリ４の故障が抑制できる。 As described above, according to the vehicle-mounted battery cooling device 1 of the present embodiment, the battery frame 3 which is attached to the floor back surface 21 of the automobile body 2 and which contacts and supports the battery 4 and the liquid in the battery frame 3 Since the refrigerant circulator 5 for circulating the refrigerant is provided, the cooling heat of the liquid refrigerant is transferred to the battery 4 via the battery frame 3. On the other hand, since the liquid refrigerant cools the battery frame 3 and does not come into contact with the battery 4, failure of the battery 4 due to water leakage can be suppressed.
　また本実施形態の車載バッテリの冷却装置１によれば、バッテリフレーム３は、少なくとも板状の底面フレーム３１を含み、バッテリ４は、底面フレーム３１と、これに対面する自動車ボディ２の床裏面２１との間の空間に、底面フレーム３１に接触した状態で収納されている。また、本実施形態の車載バッテリの冷却装置１によれば、バッテリフレーム３は、板状の底面フレーム３１と、底面フレーム３１の外周部に固定された複数の板状の側面フレーム３２～３５と、を含み、バッテリ４は、底面フレーム３１と、これに対面する自動車ボディ２の床裏面２１と、複数の側面フレーム３２～３５とで囲まれた空間に、底面フレーム３１及び側面フレーム３２～３５の少なくとも一方に接触した状態で収納されている。これにより、液体冷媒による冷却熱はバッテリフレーム３の底面フレーム３１又は側面フレーム３２～３５を介してバッテリ４に伝えられる。一方において、液体冷媒はバッテリフレーム３の底面フレーム３１又は側面フレーム３２～３５を冷却し、バッテリ４には接しないので、漏水によるバッテリ４の故障が抑制できる。 Further, according to the vehicle-mounted battery cooling device 1 of the present embodiment, the battery frame 3 includes at least a plate-shaped bottom frame 31, and the battery 4 includes the bottom frame 31 and the floor back surface 21 of the automobile body 2 facing the bottom frame 31. It is stored in the space between the two and the bottom frame 31 in contact with the bottom frame 31. Further, according to the vehicle-mounted battery cooling device 1 of the present embodiment, the battery frame 3 includes a plate-shaped bottom frame 31 and a plurality of plate-shaped side frames 32 to 35 fixed to the outer peripheral portion of the bottom frame 31. In a space surrounded by the bottom frame 31, the floor back surface 21 of the automobile body 2 facing the bottom frame 31, and the plurality of side frames 32 to 35, the battery 4 includes the bottom frame 31 and the side frames 32 to 35. It is stored in contact with at least one of them. As a result, the cooling heat from the liquid refrigerant is transferred to the battery 4 via the bottom frame 31 or the side frames 32 to 35 of the battery frame 3. On the other hand, since the liquid refrigerant cools the bottom frame 31 or the side frames 32 to 35 of the battery frame 3 and does not come into contact with the battery 4, failure of the battery 4 due to water leakage can be suppressed.
　また本実施形態の車載バッテリの冷却装置１によれば、冷媒循環器５は、液体冷媒が流れる流路５１と、液体冷媒を流すポンプ５２と、液体冷媒を冷却する冷却器５３と、を含み、バッテリ４は、底面フレーム３１に接触し、流路５１の一部は底面フレーム３１に設けられているので、冷媒循環器５の液体冷媒による冷却熱はバッテリフレーム３の底面フレーム３１を介してバッテリ４に伝えられる。一方において、冷媒循環器５の液体冷媒はバッテリフレーム３の底面フレーム３１を冷却し、バッテリ４には接しないので、漏水によるバッテリ４の故障が抑制できる。 Further, according to the vehicle-mounted battery cooling device 1 of the present embodiment, the refrigerant circulator 5 includes a flow path 51 through which the liquid refrigerant flows, a pump 52 through which the liquid refrigerant flows, and a cooler 53 for cooling the liquid refrigerant. Since the battery 4 is in contact with the bottom frame 31 and a part of the flow path 51 is provided in the bottom frame 31, the heat of cooling by the liquid refrigerant of the refrigerant circulator 5 is transmitted through the bottom frame 31 of the battery frame 3. It is transmitted to the battery 4. On the other hand, since the liquid refrigerant in the refrigerant circulator 5 cools the bottom frame 31 of the battery frame 3 and does not come into contact with the battery 4, failure of the battery 4 due to water leakage can be suppressed.
　また本実施形態の車載バッテリの冷却装置１によれば、底面フレーム３１は、アッパプレート３１１と、中空部３１３を介してこれに対面するロアプレート３１２と、中空部３１３においてアッパプレート３１１とロアプレート３１２を繋ぐリブ３１４と、を有する中空板状のフレームであり、流路５１は、中空部３１３のアッパプレート３１１に接する位置に設けられている。これにより、流路５１を流れる液体冷媒の冷却熱が、アッパプレート３１１に伝わり易くなる。一方において、流路５１をロアプレート３１２に接触させず、中空部３１３の空気を介在させることにより、液体冷媒の冷却熱をロアプレート３１２から逃がさないようにすることができる。 Further, according to the vehicle-mounted battery cooling device 1 of the present embodiment, the bottom frame 31 has an upper plate 311 and a lower plate 312 facing the upper plate 313 via the hollow portion 313, and the upper plate 311 and the lower plate in the hollow portion 313. It is a hollow plate-shaped frame having ribs 314 connecting 312, and the flow path 51 is provided at a position in contact with the upper plate 311 of the hollow portion 313. As a result, the cooling heat of the liquid refrigerant flowing through the flow path 51 is easily transmitted to the upper plate 311. On the other hand, by not contacting the flow path 51 with the lower plate 312 and interposing the air in the hollow portion 313, the cooling heat of the liquid refrigerant can be prevented from escaping from the lower plate 312.
　また本実施形態の車載バッテリの冷却装置１によれば、流路５１は、中空部３１３のリブ３１４に近接する位置に設けられているので、流路５１の強度を確保することができる。 Further, according to the in-vehicle battery cooling device 1 of the present embodiment, since the flow path 51 is provided at a position close to the rib 314 of the hollow portion 313, the strength of the flow path 51 can be ensured.
　また本実施形態の車載バッテリの冷却装置１によれば、バッテリ４は、複数のバッテリモジュール４１を含み、それぞれのバッテリモジュール４１は、直方体状のモジュールケースに収納され、複数のバッテリモジュール４１の各主面４１１が底面フレーム３１の面に垂直になるように、複数のバッテリモジュール４１が、底面フレーム３１の面上に並設されている。換言すれば、複数のバッテリモジュール４１の各側面４１２が、底面フレーム３１の面に接するように、複数のバッテリモジュール４１が、底面フレーム３１の面上に並設されて固定される。このように複数のバッテリモジュール４１を縦にして並べることで、全てのバッテリモジュール４１を底面フレーム３１に接触させることができ、全てのバッテリモジュール４１を万遍なく冷却することができる。 Further, according to the vehicle-mounted battery cooling device 1 of the present embodiment, the battery 4 includes a plurality of battery modules 41, and each battery module 41 is housed in a rectangular module case, and each of the plurality of battery modules 41 is housed in a rectangular module case. A plurality of battery modules 41 are arranged side by side on the surface of the bottom frame 31 so that the main surface 411 is perpendicular to the surface of the bottom frame 31. In other words, the plurality of battery modules 41 are juxtaposed and fixed on the surface of the bottom frame 31 so that each side surface 412 of the plurality of battery modules 41 is in contact with the surface of the bottom frame 31. By arranging the plurality of battery modules 41 vertically in this way, all the battery modules 41 can be brought into contact with the bottom frame 31, and all the battery modules 41 can be cooled evenly.
　また本実施形態の車載バッテリの冷却装置１によれば、流路５１は、底面フレーム３１の延在方向に沿って並んで設けられた複数の流路５１からなり、流路５１が対面するバッテリモジュール４１の数量が同等になるように、複数の流路５１のレイアウトが設定されている。これにより、冷却性能の偏在化を抑制でき、複数のバッテリモジュール４１を均等に冷却することができる。 Further, according to the vehicle-mounted battery cooling device 1 of the present embodiment, the flow path 51 is composed of a plurality of flow paths 51 provided side by side along the extending direction of the bottom frame 31, and the flow paths 51 face each other. The layout of the plurality of flow paths 51 is set so that the number of modules 41 is the same. As a result, uneven distribution of cooling performance can be suppressed, and a plurality of battery modules 41 can be cooled evenly.
　なお、上述した実施形態では、バッテリモジュール４１が底面フレーム３１に接触した例を示したが、これに代えて又はこれに加えて、バッテリモジュール４１の全て又は一部が側面フレーム３２～３５の少なくともいずれかに接触してもよい。 In the above-described embodiment, the example in which the battery module 41 comes into contact with the bottom frame 31 is shown, but instead or in addition to this, all or part of the battery module 41 is at least at least the side frames 32 to 35. You may contact either.
１…冷却装置
２…自動車ボディ
　２１…床裏面
　２２…ダッシュパネル
　２３…フロントフロアパネル
　２４…リヤフロアパネル
　２５…シル
３…バッテリフレーム
　３１…底面フレーム
　　３１Ａ，３１Ｂ，３１Ｃ，３１Ｄ，３１Ｅ，３１Ｆ…サブ底面フレーム
　　３１１…アッパプレート
　　３１２…ロアプレート
　　３１３…中空部
　　３１４…リブ
　３２，３３，３４，３５…側面フレーム
　　３２１…リブ
　３６…仕切り板
　３７…ブラケット
　３８…カバー
４…バッテリ
　４１…バッテリモジュール
　　４１１…主面
　　４１２…側面
５…冷媒循環器
　５１…流路
　５２…ポンプ
　５３…冷却器
　５４…冷媒タンク
６…冷房サイクル
　６１…コンデンサ
　６２…ファン
　６３…コンプレッサ
　６４…エバポレータ
　６５…冷媒配管
　６６…三方弁
　６７，６８…逆止弁 1 ... Cooling device 2 ... Automotive body 21 ... Floor back surface 22 ... Dash panel 23 ... Front floor panel 24 ... Rear floor panel 25 ... Sill 3 ... Battery frame 31 ... Bottom frame 31A, 31B, 31C, 31D, 31E, 31F ... Sub bottom surface Frame 311 ... Upper plate 312 ... Lower plate 313 ... Hollow part 314 ... Rib 32, 33, 34, 35 ... Side frame 321 ... Rib 36 ... Partition plate 37 ... Bracket 38 ... Cover 4 ... Battery 41 ... Battery module 411 ... Main surface 412 ... Side 5 ... Refrigerant circulator 51 ... Flow path 52 ... Pump 53 ... Cooler 54 ... Refrigerant tank 6 ... Cooling cycle 61 ... Condenser 62 ... Fan 63 ... Compressor 64 ... Evaporator 65 ... Refrigerant piping 66 ... Three- way valve 67,68 …Check valve

Claims (8)

  1. 　自動車ボディの床裏に取り付けられ、バッテリに接触してこれを支持するバッテリフレームと、
    　前記バッテリフレームに液体冷媒を循環させる冷媒循環器と、を備える車載バッテリの冷却装置。     A battery frame that is attached to the underfloor of the car body and supports it by contacting the battery,
    An in-vehicle battery cooling device including a refrigerant circulator that circulates a liquid refrigerant in the battery frame.
  2. 　前記バッテリフレームは、少なくとも板状の底面フレームを含み、
    　前記バッテリは、前記底面フレームと、これに対面する前記自動車ボディの床裏面との間の空間に、前記底面フレームに接触した状態で収納されている請求項１に記載の車載バッテリの冷却装置。     The battery frame includes at least a plate-shaped bottom frame.
    The vehicle-mounted battery cooling device according to claim 1, wherein the battery is housed in a space between the bottom frame and the back surface of the floor of the automobile body facing the bottom frame in a state of being in contact with the bottom frame.
  3. 　前記バッテリフレームは、板状の底面フレームと、前記底面フレームの外周部に固定された複数の板状の側面フレームと、を含み、
    　前記バッテリは、前記底面フレームと、これに対面する前記自動車ボディの床裏面と、前記複数の側面フレームとで囲まれた空間に、前記底面フレーム及び前記側面フレームの少なくとも一方に接触した状態で収納されている請求項１又は２に記載の車載バッテリの冷却装置。     The battery frame includes a plate-shaped bottom frame and a plurality of plate-shaped side frames fixed to the outer peripheral portion of the bottom frame.
    The battery is stored in a space surrounded by the bottom frame, the back surface of the automobile body facing the bottom frame, and the plurality of side frames in a state of being in contact with at least one of the bottom frame and the side frames. The vehicle-mounted battery cooling device according to claim 1 or 2.
  4. 　前記冷媒循環器は、前記液体冷媒が流れる流路と、前記液体冷媒を流すポンプと、前記液体冷媒を冷却する冷却器と、を含み、
    　前記バッテリは、前記底面フレームに接触し、
    　前記流路は、前記底面フレームに設けられている請求項２又は３に記載の車載バッテリの冷却装置。     The refrigerant circulator includes a flow path through which the liquid refrigerant flows, a pump through which the liquid refrigerant flows, and a cooler for cooling the liquid refrigerant.
    The battery comes into contact with the bottom frame and
    The vehicle-mounted battery cooling device according to claim 2 or 3, wherein the flow path is provided on the bottom frame.
  5. 　前記底面フレームは、アッパプレートと、中空部を介してこれに対面するロアプレートと、前記中空部において前記アッパプレートと前記ロアプレートを繋ぐリブと、を有する中空板状のフレームであり、
    　前記流路は、前記中空部の前記アッパプレートに接する位置に設けられている請求項４に記載の車載バッテリの冷却装置。     The bottom frame is a hollow plate-like frame having an upper plate, a lower plate facing the upper plate via a hollow portion, and a rib connecting the upper plate and the lower plate in the hollow portion.
    The vehicle-mounted battery cooling device according to claim 4, wherein the flow path is provided at a position where the hollow portion is in contact with the upper plate.
  6. 　前記流路は、前記中空部の前記リブに近接する位置に設けられている請求項５に記載の車載バッテリの冷却装置。 The vehicle-mounted battery cooling device according to claim 5, wherein the flow path is provided at a position close to the rib of the hollow portion.
  7. 　前記バッテリは、複数のバッテリモジュールを含み、
    　それぞれのバッテリモジュールは、直方体状のモジュールケースに収納され、
    　前記複数のバッテリモジュールの各主面が前記底面フレームの面に垂直になるように、前記複数のバッテリモジュールが、前記底面フレームの面上に並設されている請求項２～６のいずれか一項に記載の車載バッテリの冷却装置。     The battery includes a plurality of battery modules.
    Each battery module is housed in a rectangular parallelepiped module case.
    Any one of claims 2 to 6 in which the plurality of battery modules are arranged side by side on the surface of the bottom frame so that each main surface of the plurality of battery modules is perpendicular to the surface of the bottom frame. The vehicle-mounted battery cooling device according to the section.
  8. 　前記流路は、前記底面フレームの延在方向に沿って並んで設けられた複数の流路からなり、
    　前記流路が対面するバッテリモジュールの数量が同等になるように、前記複数の流路のレイアウトが設定されている請求項４～６のいずれか一項に記載の車載バッテリの冷却装置。     The flow path is composed of a plurality of flow paths provided side by side along the extending direction of the bottom frame.
    The vehicle-mounted battery cooling device according to any one of claims 4 to 6, wherein the layout of the plurality of flow paths is set so that the number of battery modules facing the flow paths is the same.
PCT/JP2019/039842 2019-10-09 2019-10-09 Cooling device for on-board battery WO2021070287A1 (en)

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Citations (2)

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JPH08164750A (en) * 1994-12-13 1996-06-25 Nissan Motor Co Ltd Battery frame structure for electric vehicle
US20180215282A1 (en) * 2016-12-23 2018-08-02 Benteler Automobiltechnik Gmbh Battery holder for a vehicle

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JP5673428B2 (en) 2011-08-08 2015-02-18 トヨタ自動車株式会社 Battery mounting structure for vehicles
JP6248972B2 (en) 2015-03-23 2017-12-20 トヨタ自動車株式会社 Battery pack
JP2017193300A (en) 2016-04-22 2017-10-26 トヨタ自動車株式会社 Battery mounting structure of vehicle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08164750A (en) * 1994-12-13 1996-06-25 Nissan Motor Co Ltd Battery frame structure for electric vehicle
US20180215282A1 (en) * 2016-12-23 2018-08-02 Benteler Automobiltechnik Gmbh Battery holder for a vehicle

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