JP2008159440A - Vehicular battery cooling system - Google Patents

Vehicular battery cooling system Download PDF

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Publication number
JP2008159440A
JP2008159440A JP2006347941A JP2006347941A JP2008159440A JP 2008159440 A JP2008159440 A JP 2008159440A JP 2006347941 A JP2006347941 A JP 2006347941A JP 2006347941 A JP2006347941 A JP 2006347941A JP 2008159440 A JP2008159440 A JP 2008159440A
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JP
Japan
Prior art keywords
battery
cooling system
exterior film
battery cell
plate
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.)
Pending
Application number
JP2006347941A
Other languages
Japanese (ja)
Inventor
Toshiyuki Motohashi
Yoshikazu Takamatsu
Toshiharu Watanabe
Toshikazu Yoshihara
俊和 吉原
季之 本橋
年春 渡辺
由和 高松
Original Assignee
Calsonic Kansei Corp
カルソニックカンセイ株式会社
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
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Application filed by Calsonic Kansei Corp, カルソニックカンセイ株式会社 filed Critical Calsonic Kansei Corp
Priority to JP2006347941A priority Critical patent/JP2008159440A/en
Publication of JP2008159440A publication Critical patent/JP2008159440A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0202Cases, jackets or wrappings for small-sized cells or batteries, e.g. miniature battery or power cells, batteries or cells for portable equipment
    • H01M2/0207Flat-shaped cells or batteries of flat cells
    • H01M2/0212Flat-shaped cells or batteries of flat cells with plate-like or sheet-like terminals
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/613Cooling or keeping cold
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/62Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625Vehicles
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/64Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647Prismatic or flat cells, e.g. pouch cells
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/655Solid structures for heat exchange or heat conduction
    • H01M10/6554Rods or plates
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/655Solid structures for heat exchange or heat conduction
    • H01M10/6556Solid parts with flow channel passages or pipes for heat exchange
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/656Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6569Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/66Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • H01M10/663Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/02Cases, jackets or wrappings
    • H01M2/0202Cases, jackets or wrappings for small-sized cells or batteries, e.g. miniature battery or power cells, batteries or cells for portable equipment
    • H01M2/0207Flat-shaped cells or batteries of flat cells
    • H01M2/021Flat-shaped cells or batteries of flat cells with both terminals passing through the case or cover
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/10Mountings; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M2/1016Cabinets, cases, fixing devices, adapters, racks or battery packs
    • H01M2/1072Cabinets, cases, fixing devices, adapters, racks or battery packs for starting, lighting or ignition batteries; Vehicle traction batteries; Stationary or load leading batteries
    • H01M2/1077Racks, groups of several batteries

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle battery cooling system capable of improving thermal conductivity from a battery element body and improving cooling efficiency.
SOLUTION: A battery cell 2 in which a battery element 21 and electrode tabs 22 and 23 are covered with an exterior film 24 so that the electrode tabs 22 and 23 are partially exposed, and a cold plate that exchanges heat by flowing a refrigerant inside. In the vehicular battery cooling system having 5, the exterior film 24 is configured to fold back an integral object, and the heat generated from the battery element 21 to the cold plate 5 is conducted through the folded portion.
[Selection] Figure 1

Description

  The present invention belongs to the technical field of a vehicle battery cooling system for cooling a traveling battery installed in a vehicle.

Conventionally, a battery element is provided with current collectors for each of a positive electrode and a negative electrode, lead terminals are connected to the current collectors, respectively, and the battery element is sandwiched from above and below by two exterior films. The outer peripheral film is sealed in the outer film by bonding the peripheral edge of the outer film (for example, see Patent Document 1).
Japanese Patent Laying-Open No. 2004-265761 (page 2-11, all figures)

  However, conventionally, there is a problem that heat conduction from the battery element body is poor because the laminate portion has an edge.

  The present invention has been made paying attention to the above-mentioned problems, and an object of the present invention is to provide a vehicle battery cooling system capable of improving the thermal conductivity from the battery element body and improving the cooling efficiency. There is to do.

  In order to achieve the above object, in the present invention, for a vehicle, the battery element and the electrode are provided with a battery cell that is covered with an exterior film so that the electrode is partially exposed, and a cooling plate that exchanges heat by flowing a refrigerant inside. In the battery cooling system, the exterior film is configured to fold back an integrated object, and is configured to conduct heat generation from the battery element to the cooling plate through the folded portion. Features.

  Therefore, in this invention, the thermal conductivity from a battery element body can be improved and cooling efficiency can be improved.

  Embodiments for realizing a vehicle battery cooling system according to the present invention will now be described in the first embodiment corresponding to the first and second embodiments, and the second embodiment corresponding to the first, second and third embodiments. A third embodiment corresponding to the invention according to claims 1, 2, 3 and 4 will be described.

First, the configuration will be described.
FIG. 1 is an explanatory diagram illustrating a battery structure of a vehicle battery cooling system according to a first embodiment. FIG. 2 is an explanatory diagram illustrating a state in which the side plate is disassembled in the battery structure of the vehicle battery cooling system according to the first embodiment. FIG. 3 is an explanatory front view of the battery cell of the vehicle battery cooling system according to the first embodiment. FIG. 4 is an explanatory side view of the battery cell of the vehicle battery cooling system according to the first embodiment. FIG. 5 is an explanatory view showing a developed state of the exterior film of the battery cell of the vehicle battery cooling system of the first embodiment. FIG. 6 is an explanatory diagram illustrating a vehicle setting position of the battery device of the vehicle battery cooling system according to the first embodiment.

The configuration will be described.
The battery device 1 of the vehicle battery cooling system according to the first embodiment includes a battery cell 2, side plates 3 and 4, and a cold plate 5 as main components.
As shown in FIG. 5, the battery cell 2 includes a battery element 21, electrode tabs 22 and 23, and an exterior film 24. Further, the battery cell 2 has the side of the battery element 21 positioned in the vicinity of the fold of the unfolded exterior film 24, and the other side of the battery element 21 is inside with a predetermined width from the outer periphery of the exterior film 24. The electrode tabs 22 and 23 are structured so as to protrude outward, and the exterior film 24 is folded and wrapped.

That is, since the exterior film 24 wraps around the battery element 21 and the electrode tabs 22 and 23, one side has no border and the other three sides have a border that joins the exterior films 24 together. . An example of joining the exterior films 24 is thermal welding.
The battery cell 2 has a structure in which one side without an edge portion of the exterior film 24 is disposed downward so that the one side is grounded on the upper surface of the cold plate 5.
A lithium ion battery is given as an example of the battery cell 2.

The side plates 3 and 4 have a plurality of vertically long openings 31 and 41 formed on one surface of a box shape that is long in the vertical direction so that the battery cells 2 are stacked in the horizontal direction, and on the surface opposite to the openings 31 and 41. A plurality of vertically long slits 32 and 42 penetrating the electrode tabs 22 and 23 are provided.
Further, as shown in FIG. 2, the side plates 3 and 4 are further extended to the side of the openings 31 and 41 by extending the surface provided with the slits 32 and 42 downward from a box-shaped lower surface that is long in the vertical direction and bending the surface. L-shaped portions to be extended are provided, and U-shaped holding portions 33 and 43 into which the cold plate 5 is inserted are formed.

  Here, the assembly structure of the battery device 1 of the vehicle battery cooling system according to the first embodiment will be described. As shown in FIGS. Then, a plurality of stacked layers are arranged on the upper surface of the cold plate 5 so that one side of the cold plate 5 is grounded, and both ends of the stacked battery cell 2 are inserted into the openings 31 and 41 of the side plates 3 and 4, respectively. The two electrode tabs 22 and 23 are passed through the slits 32 and 42. At this time, the cold plate 5 is inserted and fitted into the U-shaped holding portions 33 and 43 of the side plates 3 and 4.

Next, the detailed structure of the cold plate 5 of the vehicle battery cooling system according to the first embodiment will be described.
FIG. 7 is a side view of the cold plate. FIG. 8 is a partially cutaway plan view of the cold plate without the upper plate. 9 is a cross-sectional view taken along the line AA in FIG.

The cold plate 5 of the first embodiment mainly includes an inlet side pipe 51, an outlet side pipe 52, an upper plate 53, a first lower plate 54, a second lower plate 55, a tank 56, and an inner fin 57.
First, the 1st lower plate 54 and the 2nd lower plate 55 which became the cross-sectional shape dented so that a groove part may be comprised are provided. The second lower plate 55 has a wider groove width than the first lower plate 54.

The first lower plate 54 and the second lower plate 55 are arranged in parallel, and are attached to the upper plate 53 that covers the upper part so as to form two long passages in the longitudinal direction.
This forms a passage that extends long in the longitudinal direction.
Inner fins 57 are provided in the two passages. The inner fin 57 has a structure that divides the two passages of the first passage and the second passage into a plurality of passages in the longitudinal direction, and rectifies the refrigerant flow.

The left end of the first passage and the second passage constituted by the first lower plate 54, the second lower plate 55, and the inner fin 57 is closed, and the right end is connected to the opening of the tank 56 having an internal space. To.
As a result, the first passage is folded inside the tank 56 and is directed to the second passage.

Furthermore, the inlet side pipe 51 is connected to the first lower plate 54 near the left end of the first passage, and the outlet side pipe 52 is connected to the second lower plate 55 near the left end of the second passage. To do.
The inner fin 57 portion and other portions in the vicinity of the inlet side pipe 51 are provided with a portion where the inner fin 57 is not partitioned. Further, the inner fin 57 portion in the vicinity of the outlet side pipe 52 and other portions are provided with portions where the inner fin 57 is not partitioned.

The internal space of the tank 56 has a predetermined space so that a sufficient amount of refrigerant flows to the second passage.
And in this cold plate 5, a battery is cooled by flowing the refrigerant | coolant of an air-conditioning system inside, for example.

Next, the operation will be described.
[High cooling effect]
In the vehicle battery cooling system of the first embodiment, the liquefied air-conditioning refrigerant flows from the inlet side pipe 51 of the cold plate 5, passes through the first lower plate 54 portion which is the first passage, and passes through the tank 56. Thus, the flow direction is changed, and the refrigerant changed so that the flow direction is bent passes through the second lower plate 55 portion which is the second passage and flows out from the outlet side pipe 52 to the outside.
The air-conditioner refrigerant is a liquid that boils from the liquid state and vaporizes between the inlet-side pipe 51, the first passage, the second passage, and the outlet-side pipe 52.

  Furthermore, the inner fin 57 provided in the first passage and the second passage allows the partition portion of the inner fin 57 that conducts high heat by metal contact with the upper plate 53, the first lower plate 54, and the second lower plate 55 to be a heat exchange area. Widely contacts with refrigerant to exchange heat. Thereby, cooling is performed with higher efficiency.

  In the vehicle battery cooling system according to the first embodiment, the cold plate 5 performs cooling in a wide interview. However, the cold plate 5 performs uniform and efficient cooling as described above, thereby further cooling a part of the battery. Since it is cooled more efficiently than before without becoming insufficient, it is advantageous for future performance improvement and space saving of the battery.

[Improvement of thermal conductivity from battery element]
In the vehicle battery cooling system of the first embodiment, in the battery cell 2, the folded portion of the exterior film 24 can be brought into contact with or close to the cold plate 5.
FIG. 10 is an explanatory diagram of a state where a battery cooling structure similar to that of the first embodiment is provided in the case where there is an edge portion of the exterior film 24.
Conventionally, since there are edge portions of the exterior film 24 in four directions, a close structure as in the first embodiment cannot be taken. Therefore, conventionally, heat generated from the battery element 21 is conducted to the cold plate 5 through the edge portion of the exterior film 24 (see FIG. 10). On the other hand, in Example 1, since the folded part of the exterior film 24 is interposed, the thermal conductivity is greatly improved.
Therefore, the heat generated from the battery element 21 is easily dissipated, and the cooling efficiency is improved.

[Action to reduce costs]
In the vehicle battery cooling system of the first embodiment, a very easy assembly structure is realized by the insertion structure of the battery cell 2 and the side plates 3 and 4 and the insertion structure of the side plates 3 and 4 and the cold plate 5. is doing. As a result, work efficiency is improved, which leads to cost reduction.

Furthermore, in Example 1, the exterior film 24 has a folded structure, so that the number of parts can be reduced, the joint portion such as thermal welding can be reduced, work efficiency is improved, and cost is reduced. Connected.
Thus, in Example 1, thermal conductivity can be improved, suppressing cost.

Next, the effect will be described.
In the vehicle battery cooling system of the first embodiment, the effects listed below can be obtained.

  (1) The battery cell 2 in which the battery element 21 and the electrode tabs 22 and 23 are covered with the exterior film 24 so that the electrode tabs 22 and 23 are partially exposed, and the cold plate 5 that exchanges heat by flowing a refrigerant inside. In the vehicle battery cooling system provided with the battery element body, the exterior film 24 is configured to be folded back so that the heat generated from the battery element 21 to the cold plate 5 can be conducted through the folded portion. Therefore, the thermal conductivity can be improved and the cooling efficiency can be improved.

  (2) The folded portion of the exterior film 24 is at least one side portion of the plate-shaped battery cell 2 and is placed on the cold plate 5 with one side of the folded portion of the exterior film 24 of the battery cell 2 facing down. Since a plurality of battery cells 2 are erected so as to be stacked and side plates 3 and 4 are fitted on the left and right ends of the battery cell 2 and held on the cold plate 5, the stacked battery cells 2 can be easily formed. While being able to be assembled, the thermal conductivity from the battery element bodies of the plurality of stacked battery cells 2 can be improved, and the cooling efficiency can be improved.

Example 2 is an example in which a battery cell is erected between cold plates arranged on the top and bottom with two exterior films on opposite sides of the battery cell facing each other.
FIG. 11 is an explanatory diagram illustrating a battery structure of the vehicle battery cooling system according to the second embodiment. FIG. 12 is an explanatory front view of the battery cell of the vehicle battery cooling system according to the second embodiment. FIG. 13 is an explanatory side view of the battery cell of the vehicle battery cooling system according to the second embodiment. FIG. 14 is an explanatory view showing a developed state of the exterior film of the battery cell of the vehicle battery cooling system of the second embodiment. FIG. 15 is an explanatory view showing a bonding state of the exterior film of the battery cell of the vehicle battery cooling system of the second embodiment. FIG. 16 is an explanatory view showing a state in which the side plate is disassembled in the battery structure of the vehicle battery cooling system of the second embodiment.

The configuration will be described.
In Example 2, as shown in FIG. 14, the exterior film 25 is configured to be folded back on both sides of the battery element 21 of the battery cell 2.
Further, as shown in FIGS. 11 and 16, the side plates 3 and 4 form U-shaped holding portions 34 and 44 into which the cold plate 5 is inserted at the upper end portion, similarly to the lower end portion.

  Explaining the configuration of Example 2 along the assembly structure, as shown in FIG. 14, the battery element 21 is arranged at the center of the developed outer film 25 and the electrode tabs 22, 23 protrude from the left and right. In the vicinity of the upper and lower sides of the battery element 21, the exterior film 25 is folded back toward the center. And as shown in FIG. 15, the upper and lower ends of the folded exterior film 25 are put together and heat-welded, and the joined portion is further folded to reduce the thickness (see FIG. 13).

A plurality of the battery cells 2 are arranged so as to be stacked in the horizontal direction on the upper surface of the cold plate 5 below the cold plates 5 arranged above and below, and the upper and lower sides of the battery cells 2 are respectively in contact with or near the cold plate 5. A state, that is, a state in which a plurality of stacked battery cells 2 are sandwiched between the cold plates 5 from above and below. Then, both ends of the stacked battery cell 2 are inserted into the openings 31 and 41 of the side plates 3 and 4, respectively, so that the electrode tabs 22 and 23 of the battery cell 2 pass through the slits 32 and 42. At this time, the cold plate 5 is inserted and fitted into the lower U-shaped holding portions 33 and 43 and the upper U-shaped holding portions 34 and 44 on the side plates 3 and 4 respectively. (See FIGS. 11 and 16).
Since other configurations are the same as those of the first embodiment, description thereof is omitted.

Next, the operation will be described.
[Improvement of thermal conductivity from battery element]
In the vehicle battery cooling system of the second embodiment, the upper and lower folded portions of the exterior film 24 in the battery cell 2 can be brought into contact with or close to the cold plate 5. Therefore, the heat generated from the battery element 21 is more easily dissipated in the vertical direction, and the cooling efficiency is improved.

[Action to reduce costs]
In the vehicle battery cooling system according to the second embodiment, the insertion structure between the battery cell 2 and the side plates 3 and 4 and the insertion structure between the side plates 3 and 4 and the upper and lower cold plates 5 are very easy. A simple assembly structure is realized. As a result, work efficiency is improved, which leads to cost reduction.
Thus, in Example 2, thermal conductivity can be improved, suppressing cost.

Next, the effect will be described.
The vehicle battery cooling system according to the second embodiment has the following effects in addition to the effects (1) and (2).
(3) The folded portion of the exterior film 25 is the two upper and lower sides of the plate-like battery cell 2, and the side plates 3 and 4 are folded between the cold plates 5 arranged above and below the exterior film 25 of the battery cell 2. A plurality of battery cells 2 are erected so as to be stacked sideways with one side of the portion up and down, and the left and right ends of the battery cell 2 and the end of the cold plate 5 disposed above and below are respectively held by holding portions 33, 34, 43, The battery element body of the plurality of stacked battery cells 2 can be easily assembled to the upper and lower cold plates 5 while being fitted to 44 and held on the cooling plate. Therefore, the thermal conductivity can be improved by transmitting up and down, and the cooling efficiency can be improved.
Since other functions and effects are the same as those of the first embodiment, description thereof is omitted.

Example 3 is an example in which a groove for fitting a battery cell is provided in a cold plate.
FIG. 17 is an explanatory diagram illustrating a battery structure of the vehicle battery cooling system according to the third embodiment. FIG. 18 is an explanatory front view of the battery cell of the vehicle battery cooling system of the third embodiment. FIG. 19 is an explanatory side view of the battery cell of the vehicle battery cooling system according to the third embodiment. FIG. 20 is an explanatory diagram of a fitting structure between a battery cell and a cold plate in the vehicle battery cooling system according to the third embodiment. FIG. 21 is an explanatory view showing a state in which the side plate is disassembled in the battery structure of the vehicle battery cooling system of the third embodiment.

The configuration will be described.
In the third embodiment, a plurality of fitting grooves 58 for fitting the battery cells 2 are provided in parallel on the opposing surfaces of the cold plates 5 arranged above and below.
Further, the vertically long openings of the side plates 3 and 4 are also opened vertically so as to be openings 31a and 41a.

Explaining the configuration of Example 3 along the assembly structure, the battery film 2 is configured by folding the exterior film 25 toward the center in the vicinity of the upper and lower sides of the battery element 21.
The battery cells 2 are stacked in the lateral direction so as to fit into the fitting grooves 58 on the upper surface of the cold plate 5 on the lower side of the cold plate 5 and the fitting grooves 58 on the lower surface of the upper cold plate 5. A plurality of battery cells 2 that are arranged, that is, a plurality of stacked battery cells 2 are sandwiched between the cold plates 5 from above and below. Then, both ends of the stacked battery cell 2 are inserted into the openings 31 a and 41 a of the side plates 3 and 4, respectively, so that the electrode tabs 22 and 23 of the battery cell 2 pass through the slits 32 and 42. At this time, the cold plate 5 is inserted and fitted into the lower U-shaped holding portions 33 and 43 and the upper U-shaped holding portions 34 and 44 on the side plates 3 and 4 respectively. (See FIGS. 17 and 21).
Since other configurations are the same as those of the first and second embodiments, the description thereof is omitted.

The operation will be described.
[Improvement of thermal conductivity from battery element]
In the vehicle battery cooling system according to the third embodiment, since the upper and lower ends of the battery cell 2 are fitted in the fitting grooves 58 of the cold plate 5, the heat conduction area to the cold plate 5 at the end of the battery cell 2. Will increase. Therefore, the heat generated from the battery element 21 is more easily dissipated in the vertical direction, and the cooling efficiency is improved.

[Action to reduce costs]
In the vehicle battery cooling system of the second embodiment, since the upper and lower ends of the battery cell 2 are fitted into the fitting groove 58 of the cold plate 5, the battery cell 2 can be easily assembled. As a result, work efficiency is improved, which leads to cost reduction.
Thus, in Example 3, thermal conductivity can be improved, suppressing cost.

Next, the effect will be described.
The vehicle battery cooling system according to the third embodiment has the following effects in addition to the effects (1), (2), and (3).
(4) Since the cold plate 5 is provided with a plurality of fitting grooves 58 for fitting the folded portions of the outer film 25 of the battery cell 2 in parallel, the heat conduction area is increased, the thermal conductivity is improved, and the cooling efficiency is improved. The battery cell 2 can be easily assembled and work efficiency can be improved.
Since other functions and effects are the same as those of the first embodiment, description thereof is omitted.

  As mentioned above, although the vehicle battery cooling system of the present invention has been described based on the first to fourth embodiments, the specific configuration is not limited to these embodiments, and each claim of the claims Design changes and additions are permitted without departing from the spirit of the invention according to the paragraph.

It is explanatory drawing which shows the battery structure of the battery cooling system for vehicles of Example 1. FIG. It is explanatory drawing which shows the state which decomposed | disassembled the side plate in the battery structure of the battery cooling system for vehicles of Example 1. FIG. It is a description front view of the battery cell of the battery cooling system for vehicles of Example 1. FIG. It is a description side view of the battery cell of the battery cooling system for vehicles of Example 1. It is explanatory drawing which shows the expansion | deployment state of the exterior film of the battery cell of the battery cooling system for vehicles of Example 1. FIG. It is explanatory drawing which shows the vehicle setting position of the battery apparatus of the battery cooling system for vehicles of Example 1. FIG. It is a side view of a cold plate. It is a partially cutaway top view of the cold plate without the upper plate. It is AA sectional drawing of FIG. It is explanatory drawing of the state made into the battery cooling structure similar to Example 1, when there exists a border part of the exterior film 24. FIG. It is explanatory drawing which shows the battery structure of the battery cooling system for vehicles of Example 2. FIG. It is a description front view of the battery cell of the battery cooling system for vehicles of Example 2. It is a description side view of the battery cell of the battery cooling system for vehicles of Example 2. It is explanatory drawing which shows the expansion | deployment state of the exterior film of the battery cell of the battery cooling system for vehicles of Example 2. FIG. It is explanatory drawing which shows the joining state of the exterior film of the battery cell of the battery cooling system for vehicles of Example 2. FIG. It is explanatory drawing which shows the state which decomposed | disassembled the side plate in the battery structure of the battery cooling system for vehicles of Example 2. FIG. It is explanatory drawing which shows the battery structure of the battery cooling system for vehicles of Example 3. FIG. It is a description front view of the battery cell of the battery cooling system for vehicles of Example 3. It is a description side view of the battery cell of the battery cooling system for vehicles of Example 3. It is explanatory drawing of the fitting structure of the battery cell of the battery cooling system for vehicles of Example 3, and a cold plate. In the battery structure of the vehicle battery cooling system of Example 3, it is explanatory drawing which shows the state which decomposed | disassembled the side plate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Battery apparatus 2 Battery cell 3 Side plate 4 Side plate 5 Cold plate 21 Battery element 22 Electrode tab 23 Electrode tab 24 Exterior film 25 Exterior film 31 Opening part 41 Opening part 31a Opening part 41a Opening part 32 Slit 42 Slit 33 Holding part 43 Holding part 34 Holding part 44 Holding part 51 Inlet side pipe 52 Outlet side pipe 53 Upper plate 54 First lower plate 55 Second lower plate 56 Tank 57 Inner fin 58 Fitting groove C Vehicle

Claims (4)

  1. A battery cell in which a battery element and an electrode are covered with an exterior film so that the electrode is partially exposed;
    In a vehicle battery cooling system including a cooling plate that exchanges heat by flowing a refrigerant inside,
    The exterior film is configured to fold back an integral object, and through the folded portion, the heat generation from the battery element to the cooling plate is conducted.
    A vehicle battery cooling system.
  2. The vehicle battery system according to claim 1,
    The folded portion of the exterior film is at least one side portion of a plate-shaped battery cell,
    A plurality of the battery cells are erected on the cooling plate so that one side of the folded portion of the exterior film of the battery cell is on the bottom, and the battery cells are stacked side by side, With holding means for holding on the cooling plate,
    A vehicle battery cooling system.
  3. The vehicle battery system according to claim 1 or 2,
    The folded portion of the exterior film is the upper and lower two side portions of the plate-shaped battery cell,
    The holding means has a plurality of the battery cells erected between the cooling plates arranged above and below so that one side of the folded portion of the exterior film of the battery cell is up and down and stacked sideways, The left and right ends and the ends of the cooling plate arranged at the top and bottom are respectively fitted and held on the cooling plate.
    A vehicle battery cooling system.
  4. The vehicle battery system according to any one of claims 1 to 3,
    The cooling plate includes a plurality of fitting grooves arranged in parallel to fit the folded portion of the exterior film of the battery cell,
    A vehicle battery cooling system.
JP2006347941A 2006-12-25 2006-12-25 Vehicular battery cooling system Pending JP2008159440A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006347941A JP2008159440A (en) 2006-12-25 2006-12-25 Vehicular battery cooling system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006347941A JP2008159440A (en) 2006-12-25 2006-12-25 Vehicular battery cooling system
PCT/JP2007/074201 WO2008078586A1 (en) 2006-12-25 2007-12-17 Battery cooling system for vehicle

Publications (1)

Publication Number Publication Date
JP2008159440A true JP2008159440A (en) 2008-07-10

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