CN209981424U - Cooling and heating device for battery pack - Google Patents
Cooling and heating device for battery pack Download PDFInfo
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- CN209981424U CN209981424U CN201920336260.4U CN201920336260U CN209981424U CN 209981424 U CN209981424 U CN 209981424U CN 201920336260 U CN201920336260 U CN 201920336260U CN 209981424 U CN209981424 U CN 209981424U
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- heat transfer
- battery pack
- cooling
- elastic body
- heat
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- 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
The utility model provides a can be to the cooling and heating device for group battery that cools off or heat high-efficiently of whole monocells that constitute the group battery. The cooling and heating device (10) for a battery pack has the following structure: the battery pack is provided with heat transfer members (11) which are arranged below the battery pack (1) and have the same number as the number of the single cells (2), and elastic bodies (12) which are arranged below the heat transfer members (11) and have restoring force, wherein heat conduction is performed between the heat transfer members (11) and the single cells (2) by bringing a part of the outer surfaces of the heat transfer members (11) into contact with the lower surfaces of the single cells (2), and the heat transfer members (11) are pressed against the lower surfaces of the single cells (2) by the elastic bodies (12) which are arranged below the heat transfer members (11) and have restoring force.
Description
Technical Field
The utility model relates to a can cool off the group battery as required or the cooling and heating device for group battery that heats.
In the present specification and claims, the upper, lower, left, and right in fig. 3 are referred to as "upper, lower," and "left, respectively," the front side of the sheet of fig. 3 is referred to as "front," and the back side of the sheet of fig. 3 is referred to as "back.
In the present specification and claims, even if a plurality of heat transfer functional members are integrally connected to each other, the heat transfer functional members are referred to as "heat transfer members" when the heat transfer functional members can independently follow the lower surfaces of the unit cells located above the heat transfer functional members and come into contact with the lower surfaces. On the other hand, the term "heat transfer body" refers to a heat transfer functional portion in which a plurality of "heat transfer members" as defined above are connected to be integrated.
Background
For example, a battery device for driving a motor of a hybrid vehicle, an electric vehicle, or the like has been used in a form in which a plurality of small-sized cells (formed of various secondary batteries such as lithium ion secondary batteries, for example) are connected in series or in parallel to form an assembled battery. In particular, in an electric vehicle, a large capacity of a battery pack and an increase in the number of battery packs mounted are required for the purpose of extending a cruising distance, and therefore, a plurality of battery packs are combined in series or in parallel.
However, the performance and life of the secondary battery vary depending on the use temperature, and therefore, the secondary battery must be used at an appropriate temperature for efficient use over a long period of time.
In order to reduce the temperature difference among all the cells in the battery pack, a cooling device has been proposed which includes a metal cooling member having a flat heat transfer surface on the outer surface of the top wall and a refrigerant passage through which a refrigerant flows (see patent document 1).
In the cooling device described in patent document 1, the battery pack is placed on the heat transfer surface of the cooling member via the heat conductive sheet made of synthetic resin such as silicone resin, and the battery pack is cooled by the cold heat transferred from the refrigerant flowing through the refrigerant passage of the cooling member to the battery pack via the top wall of the cooling member and the heat conductive sheet.
However, in the battery pack described above, each unit cell may be deformed, or at least some of the unit cells may be displaced in the vertical direction, thereby causing a step difference in the heat receiving surface. Therefore, in order to absorb such deformation and level difference and improve the adhesion between the heat receiving surface of the battery pack and the heat conductive sheet, the heat conductive sheet needs to be thick. However, since the thermal conductivity of the heat conductive sheet made of synthetic resin is low, if the thickness of the heat conductive sheet is increased, the thermal conductivity between the heat receiving surface of the battery pack and the heat transfer surface of the cooling member is decreased, and thus the cells of the battery pack cannot be efficiently cooled.
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 5804323
SUMMERY OF THE UTILITY MODEL
Problem to be solved by utility model
An object of the utility model is to solve above-mentioned problem, provide a cooling and heating device for group battery that can cool off or heat all monocells that constitute the group battery high-efficiently.
Means for solving the problems
To achieve the above object, the present invention provides the following means.
[1] A cooling and heating device for a battery pack, which cools and heats a plurality of single cells constituting the battery pack,
the cooling and heating device for a battery pack includes heat transfer members arranged below the battery pack and having the same number as the number of unit cells, and elastic bodies arranged below the heat transfer members and having restoring force, and heat is transferred between the heat transfer members and the unit cells by bringing a part of the outer surfaces of the heat transfer members into contact with the lower surfaces of the unit cells, and the heat transfer members are pressed against the lower surfaces of the unit cells by the elastic bodies having restoring force arranged below the heat transfer members.
[2] The cooling and heating apparatus for a battery pack according to the above item 1, wherein the elastic body has heat insulating properties.
[3] The cooling and heating apparatus for a battery pack according to the above 1 or 2, wherein the elastic body is formed of 1 or 2 or more kinds of rubbers selected from the group consisting of natural rubber, synthetic natural rubber, chloroprene rubber, and butadiene rubber.
[4] The cooling and heating apparatus for a battery pack according to the above item 1 or 2, wherein the elastomer is formed of a rigid polyurethane foam.
[5] The cooling and heating apparatus for a battery pack according to any one of claims 1 to 4, wherein a plurality of projections or recesses are provided on an upper surface of the elastic body so as to be distributed over the entire surface.
[6] The cooling and heating apparatus for a battery pack according to any one of claims 1 to 4, wherein a groove into which at least a part of the heat transfer member is fitted is formed in an upper surface of the elastic body.
[7] The cooling and heating apparatus for a battery pack according to any one of the above items 1 to 6, wherein the lower surface of the elastic body is supported by a base member having higher rigidity than the elastic body.
[8] The cooling and heating apparatus for a battery pack according to any one of the above items 1 to 7, wherein the heat transfer member is a straight tube having a heat transfer medium flow passage through which a heat transfer medium flows, both end portions of the heat transfer member in the longitudinal direction are protruded outward from the battery pack and the elastic body in a plan view, and all the heat transfer members disposed below all the unit cells constituting 1 battery pack are connected to each other through a U-shaped connection pipe at either one of both end portions in the longitudinal direction, thereby constituting a heat transfer body having a meandering shape as a whole, and the heat transfer medium flows through the meandering heat transfer body.
[9] The cooling and heating apparatus for a battery pack according to any one of the above items 1 to 7, wherein the heat transfer member is a flat tube shape having a heat transfer medium flow path through which a heat transfer medium flows in a vertical direction in a thickness direction, both end portions of the heat transfer member in a longitudinal direction protrude outward from the battery pack and the elastic body in a plan view, one end portion of each of 2 adjacent heat transfer members in the longitudinal direction is connected by a U-folded tube portion to constitute a U-shaped heat transfer body, and the other end portion of any one of the 2 heat transfer members of the heat transfer body is connected to the heat transfer medium inlet tube, and the other end portion of the other heat transfer member of the heat transfer body is connected to the heat transfer medium outlet tube.
[10] The cooling and heating apparatus for a battery pack according to any one of claims 1 to 7, wherein the heat transfer member is formed of a heat pipe, one end portion of the heat transfer member protrudes outward from the battery pack and the elastic body in a plan view, and a heat transfer fin is provided in a portion of the heat transfer member that protrudes outward from the battery pack and the elastic body.
[11] The cooling and heating apparatus for a battery pack according to any one of the above items 1 to 7, wherein the heat transfer member is integrally formed by a plate-like body made of a composite material of aluminum and carbon particles, one end portion of the heat transfer member protrudes outward from the battery pack and the elastic body in a plan view, and a heat transfer fin is provided in a portion of the heat transfer member that protrudes outward from the battery pack and the elastic body.
Effect of the utility model
[1] In the present invention, the heat transfer member is disposed below the battery pack, the heat transfer member has the same number of cells as the number of cells, and the elastic body is disposed below the heat transfer member and has a restoring force, and heat is conducted between each heat transfer member and each cell by bringing a part of the outer surface of each heat transfer member into contact with the lower surface of each cell. Therefore, it is possible to prevent a decrease in thermal conductivity between each heat transfer member and each unit cell, and to efficiently cool or heat all the unit cells constituting the battery pack.
[2] In the present invention, the thermal conductivity between the heat transfer member and the single cell can be further improved.
[3] And [4] in the utility model, the lower surface of each single cell can be brought into contact with a part of the outer surface of each heat transfer member more sufficiently, and the thermal conductivity between each single cell and each heat transfer member can be further improved.
[5] In the present invention, the elastic body is provided with a plurality of projections or depressions on the upper surface thereof in such a manner as to be dispersed as a whole, and therefore, the present invention has the following advantages: even if a step occurs on the lower surface of the battery pack, a part of the outer surface of each heat transfer member can be brought into sufficient contact with the lower surface of each single cell (the elastic body can sufficiently absorb the difference in flatness of the lower surface of the battery pack).
[6] In the present invention, the heat transfer member is formed in a shape of a circular arc, and the heat transfer member is formed in a shape of a circular arc.
[7] In the present invention, the force with which the heat transfer member is pressed against the lower surface of the cell by the elastic body is increased, and the lower surface of each cell can be more sufficiently brought into contact with a part of the outer surface of each heat transfer member.
[8] In the present invention, since the straight-tube-shaped heat transfer medium flow path is configured such that the straight-tube-shaped heat transfer member is disposed so as not to straddle over the plurality of cells, that is, so as to be substantially parallel to the longitudinal direction of the lower surfaces of 1 cell, even in a state where the positions of the lower surfaces of the cells constituting the battery pack are uneven, each straight-tube-shaped heat transfer member can be brought into sufficient contact with the lower surface of each cell, and the thermal conductivity between the heat transfer member and the cell can be further improved.
[9] In the present invention, since the heat medium flows in parallel, the temperature deviation between the cells constituting the battery pack can be suppressed (the temperature deviation between the cells can be suppressed both when the cells are cooled and when the cells are heated) as compared with the above-mentioned utility model [8] in which the heat medium flows in series.
[10] In the present invention, the heat transfer member is formed of a heat pipe, and the heat transfer fin is provided at the outside projecting portion in the heat transfer member, so that heat can be efficiently transferred to the heat transfer fin, for example, in the case of cooling the battery pack, cooling can be performed even if cooling air is not directly blown to the battery pack. Conventionally, a battery pack has been constructed by providing gaps between the cells to serve as cooling air passages, but in the above-described utility model application [10], the cells can be brought into close contact to construct the battery pack, and space saving can be further achieved as a cooling and heating device for the battery pack.
[11] In the present invention, the heat transfer member is formed of a plate-like body made of a composite material in which aluminum and carbon particles are combined, and the heat transfer fin is provided in the portion of the heat transfer member that protrudes outward, so that heat can be efficiently transferred to the heat transfer fin, and for example, in the case of cooling the battery pack, the battery pack can be cooled without directly blowing cooling air to the battery pack. Conventionally, a battery pack has been constructed by providing gaps between the cells to serve as cooling air passages, but in the above-described utility model application [11], the cells can be brought into close contact to construct the battery pack, and space saving can be further achieved as a cooling and heating device for the battery pack.
Drawings
Fig. 1 is an exploded perspective view showing a battery pack device equipped with a cooling and heating device for a battery pack according to embodiment 1 of the present invention.
Fig. 2 is a plan view of the battery pack device of fig. 1.
Fig. 3 is a front view illustrating a portion of the battery pack device of fig. 1.
Fig. 4 is a perspective view showing a modified example of an elastic body used in the battery assembly of fig. 1.
Fig. 5 is an exploded perspective view showing a battery pack device equipped with a cooling and heating device for a battery pack according to embodiment 2 of the present invention.
Fig. 6 is a perspective view showing a modified example of the elastic body used in the battery pack of fig. 5.
Fig. 7 is a perspective view showing embodiment 3 of a cooling and heating device for a battery pack according to the present invention.
Fig. 8 is a perspective view showing a cooling and heating device for a battery pack according to embodiment 4 of the present invention.
Fig. 9 is a plan view showing a part of a battery pack device equipped with a cooling and heating device for a battery pack according to embodiment 5 of the present invention.
Fig. 10 is a plan view showing a part of a battery pack device equipped with a cooling and heating device for a battery pack according to embodiment 6 of the present invention.
Description of the reference numerals
1: battery pack
2: single cell
10. 30, 40, 50, 60, 70: cooling and heating device for battery pack
11. 31, 41, 51, 61, 71: heat transfer member
12. 20, 36: elastic body
13: base member
14: connecting pipe
15: heat transfer body
21: projection
32: u-shaped bending pipe part
33: heat transfer body
34: heat transfer medium inlet pipe
35: heat transfer medium outlet pipe
37: groove
42: heat transfer fin
Detailed Description
Hereinafter, an embodiment of a cooling and heating device for a battery pack according to the present invention will be described with reference to the drawings. In the present embodiment, the cooling and heating device according to the present invention is used for cooling and heating a cell constituting a battery pack in a battery pack having a battery pack formed of a plurality of rectangular cells.
Fig. 1 to 3 show a battery pack device equipped with a cooling and heating device for a battery pack according to embodiment 1 of the present invention. In fig. 1 to 3, the battery pack device includes, for example: the battery pack 1 includes a plurality of flat prismatic cells 2 as prismatic lithium ion secondary batteries, and a cooling and heating device 10 for a battery pack that cools all the cells 2 of the battery pack 1 by applying cold heat thereto.
The assembled battery 1 is configured by arranging a plurality of unit cells 2 in the left-right direction with the thickness direction along the left-right direction. Both left and right surfaces of each cell 2 are horizontally long, the long side is along the front-rear direction, and the short side is along the up-down direction (see fig. 1). Each of the cells 2 is provided with a pair of terminals 3 in a protruding manner, and all the cells 2 are connected in series or in parallel by the terminals 3, thereby forming the assembled battery 1. The lower surface of the battery pack 1 becomes a heat receiving surface 4 (see fig. 3).
The battery pack cooling and heating device 10 includes: heat transfer members 11 arranged below the battery pack 1 in the same number as the number of the unit cells 2; an elastic body 12 disposed below the heat transfer member 11 and having a restoring force; and a base member 13 (see fig. 1 to 3) formed of a material having higher rigidity than the elastic body 12 and disposed below the elastic body 12 so as to support the lower surface of the elastic body 12.
The heat transfer member 11 is a straight pipe having a circular cross section, has a heat transfer medium flow path (not shown) through which a liquid heat transfer medium flows, and is disposed so that its longitudinal direction is along the front-rear direction. In a plan view, both end portions (front and rear end portions) in the longitudinal direction of the heat transfer member 11 protrude outward from the battery pack 1 and the elastic body 12 (see fig. 2). All the heat transfer members 11 disposed below all the unit cells 2 constituting 1 battery pack 1 are integrally connected to each other alternately in the front-rear direction via U-shaped connection pipes 14, thereby constituting a heat transfer body 15 (see fig. 1 and 2) having a meandering shape as a whole, and a liquid heat transfer medium flows through the meandering heat transfer body 15. The heat transfer body 15 is manufactured by bending a round tube made of aluminum into a serpentine shape.
The elastic body 12 preferably has thermal insulation properties. Examples of the elastic body 12 include rubber and thermoplastic elastomer. Among them, the elastic body 12 is preferably formed of 1 or 2 or more kinds of rubbers selected from the group consisting of natural rubber, synthetic natural rubber, chloroprene rubber, and butadiene rubber. Alternatively, the elastomer 12 is preferably formed from rigid polyurethane foam. The synthetic natural rubber may, for example, be isoprene rubber.
The base member 13 is not particularly limited, and is preferably formed of, for example, metal, hard plastic, or the like. The metal is not particularly limited, and examples thereof include aluminum, aluminum alloys, iron, stainless steel, and the like.
In the above-described battery assembly, when all the cells 2 constituting the battery assembly 1 are cooled, a low-temperature cooling liquid as a heat transfer medium is supplied from one end portion of the heat transfer body 15. The coolant flows through all the heat transfer members 11 of the heat transfer body 15 and the connection pipe 14 and is sent out from the other end. While the coolant flows through the heat medium flow paths of the heat transfer members 11 of the heat transfer body 15, the heat released from the cells 2 is transferred to the coolant flowing through the heat medium flow paths of the heat transfer members 11, thereby cooling all the cells 2 of the battery pack 1.
In cold regions, when the single cell 2 needs to be heated to an appropriate temperature before starting use, a high-temperature heating liquid as a heat transfer medium is supplied from one end of the heat transfer body 15. The heating liquid flows through all the heat transfer members 11 of the heat transfer body 15 and the connection pipes 14, and is sent out from the other end. While the heating liquid flows through the heat medium flow path of each heat transfer member 11 of the heat transfer body 15, the heat possessed by the heating liquid is transferred to each unit cell 2, thereby heating all the unit cells 2 of the battery pack 1 to an appropriate temperature.
As shown in fig. 3, when at least some of the unit cells 2 are displaced in the vertical direction and a level difference occurs in the heat receiving surface 4 of the battery assembly 1, the heat transfer body 15 partially deforms following the shape of the heat receiving surface 4 of the battery assembly 1, and a part of the outer surface of each heat transfer member 11 is in contact with the lower surface of each unit cell 2. Therefore, it is possible to prevent a decrease in thermal conductivity between each heat transfer member 11 and each cell 2, and to efficiently cool or heat all the cells 2 constituting the battery assembly 1.
Fig. 4 shows a modification of the elastic body used in the cooling and heating device 10 for a battery pack shown in fig. 1 to 3. A plurality of protrusions 21 are provided on the upper surface of the elastic body 20 shown in fig. 4 so as to be dispersed as a whole. Instead of the protrusions 21, a plurality of recesses may be provided on the upper surface of the elastic body 20 so as to be distributed over the entire surface.
Fig. 5 shows a battery pack device equipped with a cooling and heating device for a battery pack according to embodiment 2 of the present invention. In fig. 5, the battery pack cooling and heating apparatus 30 includes heat transfer members 31 arranged below the battery pack 1 in the same number as the number of the unit cells 2. The heat transfer member 31 is a straight flat tube shape having a thickness direction extending in the vertical direction, has a heat transfer medium flow path (not shown) through which a liquid heat transfer medium flows, and is disposed at intervals in the width direction in a state where the longitudinal direction and the width direction are respectively along the same direction. In a plan view, both ends in the longitudinal direction of the heat transfer member 31 protrude outward beyond the battery pack 1 and the elastic body 12, and one end in the longitudinal direction of each of the adjacent 2 heat transfer members 31 is connected by a U-bent tube portion 32, and 1U-shaped heat transfer body 33 is constituted by the 2 heat transfer members 31 and the U-bent tube portions 32. The heat transfer body 33 is formed by bending a straight flat tube made of an extruded aluminum profile.
An end portion of any one of the heat transfer members 31 of the 2 heat transfer members 31 of the heat transfer body 33 opposite to the U-folded pipe portion 32 communicates with the heat transfer medium inlet pipe 34, and similarly, an end portion of the other heat transfer member 31 opposite to the U-folded pipe portion 32 communicates with the heat transfer medium outlet pipe 35. One of the heat medium inlet pipe 34 and the heat medium outlet pipe 35, here, the heat medium outlet pipe 35 is located above the other, i.e., the heat medium inlet pipe 34 (see fig. 5). The heat transfer elements 33 are arranged such that the longitudinal direction of 2 heat transfer members 31 is orthogonal to the longitudinal direction of the heat transfer medium inlet pipe 34 and the heat transfer medium outlet pipe 35, and the width direction of two heat transfer members 31 is along the longitudinal direction of the heat transfer medium inlet pipe 34 and the heat transfer medium outlet pipe 35. The heat transfer member 31 communicating with the heat medium outlet pipe 35 located upward is bent upward near the end on the heat medium outlet pipe 35 side. The upper bend is indicated by 31 a. The end of one heat transfer member 31 opposite to the U-folded pipe portion 32 is connected to the peripheral wall of the heat transfer medium inlet pipe 34, and the end of the other heat transfer member 31 opposite to the U-folded pipe portion 32, that is, the tip of the upper bent portion 31a, is connected to the peripheral wall of the heat transfer medium outlet pipe 35. The other structure is the same as the cooling and heating device for a battery pack shown in fig. 1 to 3.
Fig. 6 shows a modification of the elastic body used in the cooling and heating device for a battery pack shown in fig. 5. On the upper surface of the elastic body 36 shown in fig. 6, grooves 37 are formed in the same number as the number of the heat transfer members 31 into which at least a part of the heat transfer members 31 are fitted. The heat transfer member 31 is fitted into the recess 37 in such a manner that the upper surface is flush with the upper surface of the elastic body 36 or the upper surface is located above the upper surface of the elastic body 36.
Fig. 7 shows a cooling and heating device for a battery pack according to embodiment 3 of the present invention. In fig. 7, the battery pack cooling and heating apparatus 40 includes the same number of heat transfer members 41 as the number of unit cells 2 (not shown) disposed below the battery pack 1 (not shown). The heat transfer member 41 is formed of a flat heat pipe straight in the vertical direction in the thickness direction, and is disposed at intervals in the width direction in a state where the longitudinal direction and the width direction are along the same direction. One end portion of the heat transfer member 41 in the longitudinal direction protrudes outward from the battery pack 1 and the elastic body 12 in a plan view. The portions of the heat transfer members 41 that protrude outward from the battery pack 1 and the elastic body 12 are bent obliquely upward to form bent portions 41a, and heat transfer fins 42 made of aluminum are attached to the upper surfaces of the bent portions 41 a.
The heat transfer member 41 formed of a heat pipe has a portion in contact with the unit cell 2 serving as a heat receiving portion 43, and a bent portion 41a serving as a heat dissipating portion 44. The heat pipe serving as the heat transfer member 41 is of a coreless type.
The heat transfer fin 42 includes: a plate-shaped base portion 45; and a plurality of fin portions 46 integrally provided in parallel at intervals on the upper surface of the base portion 45 and extending in the width direction of the heat transfer member 41.
In the above-described battery assembly, when all the unit cells 2 constituting the battery assembly 1 are cooled, low-temperature cooling air flows between the adjacent fin portions 46 of the heat transfer fins 42.
When heat is released from the cell 2, the heat receiving portion 43 of the heat transfer member 41 is heated by the heat, and the heat is transferred to the working liquid in the heat receiving portion 43, whereby the working liquid is evaporated. On the other hand, in the heat dissipation portion 44, heat is absorbed by the heat transfer fins 42, the working fluid condenses in the heat dissipation portion 44, and the pressure inside the heat pipe decreases. Then, the gas-phase working fluid generated in the heat receiving unit 43 flows to the heat radiating unit 44 whose pressure has decreased, and the recondensed liquid-phase working fluid flows to the heat receiving unit 43 by gravity, so that a flow of the gas-phase working fluid and a flow of the liquid-phase working fluid are generated in the heat transfer member 41, and circulation of the working fluid occurs. Therefore, all the unit cells 2 of the battery pack 1 are uniformly cooled.
On the other hand, in the above-described battery assembly, when all the unit cells 2 constituting the battery assembly 1 are heated, a tube core is provided in the heat pipe serving as the heat transfer member 41. In this case, the portion of the heat transfer member 41 formed of the heat pipe that is present below the unit cell 2 serves as a heat dissipating portion, and the bent portion 41a serves as a heat receiving portion.
In a cold region, when all the unit cells 2 constituting the battery pack 1 need to be heated to an appropriate temperature before use, high-temperature heating air flows between adjacent fin portions of the heat transfer fins 42 to supply heat to the heat receiving portion formed by the bent portion 41a of the heat transfer member 41. The heat supplied to the heat receiving unit is transferred to the working liquid in the heat receiving unit, the working liquid evaporates, and the pressure in the heat receiving unit rises. On the other hand, since the temperature of the cell 2 is low, in the heat radiating portion in thermal contact with the cell 2, the cell 2 is heated by the heat of the cell 2 being absorbed from the heat radiating portion, the gaseous phase working liquid is condensed, and the internal pressure is lowered. Further, the vapor-phase working fluid generated in the heat receiving unit flows to the heat radiating unit, the pressure of which has been reduced, and the recondensed liquid-phase working fluid flows to the heat receiving unit due to the action of the wick, so that circulation of the working fluid occurs, and a change in latent heat of vaporization and condensation is caused. Therefore, all the cells 2 of the battery assembly 1 are uniformly heated, and all the cells 2 can be heated to an appropriate temperature in a short time.
Fig. 8 shows a cooling and heating device for a battery pack according to embodiment 4 of the present invention. In fig. 8, the battery pack cooling and heating apparatus 50 includes the same number of heat transfer members 51 as the number of unit cells 2 (not shown) disposed below the battery pack 1 (not shown). The heat transfer member 51 is a straight flat plate having a thickness direction extending in the vertical direction, and is disposed at intervals in the width direction with the longitudinal direction and the width direction extending in the same direction. In a plan view, one end portion of the heat transfer member 51 in the longitudinal direction protrudes outward from the battery pack 1 and the elastic body 12, and portions of the adjacent 2 heat transfer members 51 protruding outward from the battery pack 1 and the elastic body 12 are integrally connected via the connection portions 53, and 1 heat transfer body 54 is constituted by the 2 heat transfer members 51 and the connection portions 53. The aluminum heat transfer fins 42 are attached to the upper surface of the portion of each heat transfer member 54 that protrudes outward beyond the battery pack 1 and the elastic body 12 so as to straddle the 2 heat transfer members 51 and the connection portion 53.
The heat transfer member 54 is integrally formed by a composite body including a composite material in which aluminum and carbon particles are composited. Although not shown in the drawings, the composite body forming the heat transfer body 54 includes, for example, a plate-shaped composite material including an aluminum matrix and carbon particles dispersed in the aluminum matrix, and an aluminum main surface skin layer covering 2 main surfaces (upper surface and lower surface) of the composite material on the opposite sides to each other. The composite material has, in a laminated state: a plurality of carbon particle dispersion layers in which carbon particles are dispersed in a planar direction in an aluminum material constituting an aluminum matrix; and a plurality of aluminum layers formed of an aluminum material constituting the aluminum matrix.
In the above-described battery assembly, when all the unit cells 2 constituting the battery assembly 1 are cooled, low-temperature cooling air flows between the adjacent fin portions 46 of the heat transfer fins 42. As a result, the cold heat of the cooling air is transmitted to the lower surfaces of the cells 2 via the fin portions 46 and the base portions 45 of the heat transfer fins 42 and the heat transfer bodies 54, and all the cells 2 of the battery pack 1 can be cooled.
In cold regions, when the cells 2 need to be heated to an appropriate temperature before use, high-temperature heating air flows between the adjacent fin portions 46 of the heat transfer fins 42. Thus, the heat of the heating air is transmitted to the lower surfaces of the unit cells 2 via the fin portions 46 and the base portions 45 of the heat transfer fins 42 and the heat transfer bodies 54, and all the unit cells 2 of the battery pack 1 can be heated to an appropriate temperature.
Fig. 9 shows a battery pack device equipped with a cooling and heating device for a battery pack according to embodiment 5 of the present invention. In fig. 9, the battery pack cooling and heating apparatus 60 includes heat transfer members 61 arranged below the battery pack 1 in the same number as the number of the unit cells 2. The heat transfer member 61 is a straight flat plate shape whose thickness direction is along the vertical direction, and is disposed at intervals in the width direction so as to be positioned below each single cell 2 with the longitudinal direction and the width direction being along the same direction. One end portion of the heat transfer member 61 in the longitudinal direction protrudes outward from the battery pack 1 and the elastic body 12 in a plan view, and the aluminum heat transfer fin 42 is attached to the upper surface of the portion of each heat transfer member 61 that protrudes outward from the battery pack 1 and the elastic body 12.
The heat transfer member 61 is integrally formed by a composite body including a composite material in which aluminum and carbon particles are composited. Although not shown in the drawings, the composite forming the heat transfer member 61 includes, for example, a plate-shaped composite material including an aluminum matrix and carbon particles dispersed in the aluminum matrix, and an aluminum main surface skin layer covering 2 main surfaces (upper surface and lower surface) of the composite material on the opposite sides to each other. The composite material has, in a laminated state: a plurality of carbon particle dispersion layers in which carbon particles are dispersed in a planar direction in an aluminum material constituting an aluminum matrix; and a plurality of aluminum layers formed of an aluminum material constituting the aluminum matrix.
In the above-described battery assembly, when all the unit cells 2 constituting the battery assembly 1 are cooled, low-temperature cooling air flows between the adjacent fin portions 46 of the heat transfer fins 42. As a result, the cold heat of the cooling air is transmitted to the lower surfaces of the cells 2 via the fin portions 46 and the base portions 45 of the heat transfer fins 42 and the heat transfer member 61, and all the cells 2 of the battery pack 1 can be cooled.
In cold regions, when the cells 2 need to be heated to an appropriate temperature before use, high-temperature heating air flows between the adjacent fin portions 46 of the heat transfer fins 42. Thus, the heat of the heating air is transmitted to the lower surfaces of the unit cells 2 via the fin portions 46 and the base portions 45 of the heat transfer fins 42 and the heat transfer member 61, and all the unit cells 2 of the battery pack 1 can be heated to an appropriate temperature.
Fig. 10 shows a battery pack device equipped with a cooling and heating device for a battery pack according to embodiment 6 of the present invention. In fig. 10, the battery pack cooling and heating apparatus 70 includes heat transfer members 71 arranged below the battery pack 1 in the same number as the number of the unit cells 2. The heat transfer member 71 is a straight flat plate having a thickness direction extending in the vertical direction, and is disposed at intervals in the width direction so as to be positioned below the unit cells 2 with the longitudinal direction and the width direction extending in the same direction. In a plan view, one end portion of the heat transfer member 71 in the longitudinal direction protrudes outward from the battery pack 1 and the elastic body 12, and portions of the heat transfer member 71 protruding outward from the battery pack 1 and the elastic body 12 are integrally connected via the connection portions 72, and 1 heat transfer element 73 is constituted by all of the heat transfer member 71 and the connection portions 72. The aluminum heat transfer fins 42 are attached to the upper surface of the portion of the heat transfer member 73 that protrudes outward beyond the battery pack 1 and the elastic body 12 so as to extend over all of the heat transfer member 71 and the connection portion 72.
The heat transfer member 73 is integrally formed by a composite body including a composite material in which aluminum and carbon particles are composited. Although not shown in the drawings, the composite forming the heat transfer body 73 includes, for example, a plate-shaped composite material including an aluminum matrix and carbon particles dispersed in the aluminum matrix, and an aluminum main surface skin layer covering 2 main surfaces (upper surface and lower surface) of the composite material on the opposite sides to each other. The composite material has, in a laminated state: a plurality of carbon particle dispersion layers in which carbon particles are dispersed in a planar direction in an aluminum material constituting an aluminum matrix; and a plurality of aluminum layers formed of an aluminum material constituting the aluminum matrix.
In the above battery assembly, when all the unit cells 2 constituting the battery assembly 1 are cooled, low-temperature cooling air flows between the adjacent fin portions 46 of the heat transfer fins 42. As a result, the cold heat of the cooling air is transmitted to the lower surfaces of the cells 2 via the fin portions 46 and the base portions 45 of the heat transfer fins 42 and the heat transfer body 73, and all the cells 2 of the battery pack 1 can be cooled.
In cold regions, when the cells 2 need to be heated to an appropriate temperature before use, high-temperature heating air flows between the adjacent fin portions 46 of the heat transfer fins 42. Thus, the heat of the heating air is transmitted to the lower surfaces of the unit cells 2 via the fin portions 46 and the base portions 45 of the heat transfer fins 42 and the heat transfer body 73, and all the unit cells 2 of the battery pack 1 can be heated to an appropriate temperature.
In the above-described embodiments 4 to 6, the elastic body 12 having the same number of grooves as the heat transfer members 51, 61, 71 into which at least a part of the heat transfer members 51, 61, 71 is fitted on the upper surface thereof can be used as in the elastic body 12 shown in fig. 6. In this case, the heat transfer members 51, 61, and 71 are fitted into the grooves so that the upper surfaces are flush with the upper surface of the elastic body 12 or the upper surfaces are located above the upper surface of the elastic body 12.
Industrial applicability
The cooling and heating device for a battery pack according to the present invention is applicable to, for example, an electric vehicle having a battery pack formed of a plurality of cells of lithium ion secondary batteries, and is not particularly limited to such an application.
Claims (11)
1. A cooling and heating device for a battery pack, which cools and heats a plurality of single cells constituting the battery pack,
the cooling and heating device for a battery pack includes heat transfer members arranged below the battery pack and having the same number as the number of unit cells, and elastic bodies arranged below the heat transfer members and having restoring force, and heat is transferred between the heat transfer members and the unit cells by bringing a part of the outer surfaces of the heat transfer members into contact with the lower surfaces of the unit cells, and the heat transfer members are pressed against the lower surfaces of the unit cells by the elastic bodies having restoring force arranged below the heat transfer members.
2. The cooling and heating apparatus for a battery pack according to claim 1, wherein the elastic body has heat insulation properties.
3. The cooling and heating apparatus for a battery pack according to claim 1 or 2, wherein the elastic body is formed of 1 or 2 or more kinds of rubbers selected from the group consisting of natural rubber, synthetic natural rubber, chloroprene rubber, and butadiene rubber.
4. The cooling and heating apparatus for a battery pack according to claim 1 or 2, wherein the elastomer is formed of a rigid polyurethane foam.
5. The cooling and heating apparatus for a battery pack according to claim 1 or 2, wherein a plurality of projections or recesses are provided on an upper surface of the elastic body so as to be distributed over the entire surface.
6. The cooling and heating apparatus for a battery pack according to claim 1 or 2, wherein a groove into which at least a part of the heat transfer member is fitted is formed on an upper surface of the elastic body.
7. The cooling and heating apparatus for a battery pack according to claim 1 or 2, wherein the lower surface of the elastic body is supported by a base member having higher rigidity than the elastic body.
8. The cooling and heating apparatus for a battery pack according to claim 1 or 2, wherein the heat transfer member is in a straight tube shape having a heat transfer medium flow passage through which a heat transfer medium flows, both end portions in a longitudinal direction of the heat transfer member are protruded outward from the battery pack and the elastic body in a plan view, and all the heat transfer members arranged below all the unit cells constituting 1 battery pack are connected to each other at either end portion in the longitudinal direction thereof via a U-shaped connection pipe, thereby constituting a heat transfer body having an overall meandering shape, and the heat transfer medium flows through the meandering heat transfer body.
9. The cooling and heating apparatus for a battery pack according to claim 1 or 2, wherein the heat transfer member is a flat tube shape having a heat transfer medium flow path through which the heat transfer medium flows in a thickness direction in an up-down direction, both end portions of the heat transfer member in a longitudinal direction protrude outward from the battery pack and the elastic body in a plan view, one end portion of each of 2 adjacent heat transfer members in the longitudinal direction is connected by a U-folded tube portion to constitute a U-shaped heat transfer body, the other end portion of any one of the 2 heat transfer members of the heat transfer body is connected to the heat transfer medium inlet tube, and the other end portion of the other heat transfer member of the heat transfer body is connected to the heat transfer medium outlet tube.
10. The cooling and heating apparatus for a battery pack according to claim 1 or 2, wherein the heat transfer member is formed of a heat pipe, one end portion of the heat transfer member protrudes outward from the battery pack and the elastic body in a plan view, and a heat transfer fin is provided in a portion of the heat transfer member that protrudes outward from the battery pack and the elastic body.
11. The cooling and heating apparatus for a battery pack according to claim 1 or 2, wherein the heat transfer member is integrally formed by a plate-like body made of a composite material of aluminum and carbon particles, one end portion of the heat transfer member protrudes outward from the battery pack and the elastic body in a plan view, and a heat transfer fin is provided in a portion of the heat transfer member that protrudes outward from the battery pack and the elastic body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-072040 | 2018-04-04 | ||
| JP2018072040A JP7049892B2 (en) | 2018-04-04 | 2018-04-04 | Cooling and heating device for assembled batteries |
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| Publication Number | Publication Date |
|---|---|
| CN209981424U true CN209981424U (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920336260.4U Active CN209981424U (en) | 2018-04-04 | 2019-03-15 | Cooling and heating device for battery pack |
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| Country | Link |
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| JP (1) | JP7049892B2 (en) |
| CN (1) | CN209981424U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113224442A (en) * | 2020-02-05 | 2021-08-06 | 昭和电工株式会社 | Battery module |
| CN114171822A (en) * | 2021-12-10 | 2022-03-11 | 傲普(上海)新能源有限公司 | Lithium ion battery energy storage system based on liquid cooling plate heat dissipation |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114243165B (en) * | 2021-12-14 | 2023-10-31 | 重庆大学 | Lithium ion battery thermal management system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5147373B2 (en) * | 2007-11-29 | 2013-02-20 | 三洋電機株式会社 | Battery system |
| JP2011165390A (en) * | 2010-02-05 | 2011-08-25 | Panasonic Corp | Battery unit |
| FR3010834B1 (en) * | 2013-09-18 | 2017-01-27 | Valeo Systemes Thermiques | DEVICE FOR THERMALLY REGULATING A BATTERY PACK |
-
2018
- 2018-04-04 JP JP2018072040A patent/JP7049892B2/en active Active
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2019
- 2019-03-15 CN CN201920336260.4U patent/CN209981424U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113224442A (en) * | 2020-02-05 | 2021-08-06 | 昭和电工株式会社 | Battery module |
| CN114171822A (en) * | 2021-12-10 | 2022-03-11 | 傲普(上海)新能源有限公司 | Lithium ion battery energy storage system based on liquid cooling plate heat dissipation |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019185902A (en) | 2019-10-24 |
| JP7049892B2 (en) | 2022-04-07 |
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