Vehicle and heat exchange plate

Abstract

To provide a heat exchange plate making an on-vehicle battery have more appropriate temperature.SOLUTION: A heat exchange plate includes: a first face; a second face; a cooling liquid flow path circulating a cooling liquid between the first face and the second face; and a refrigerant flow path circulating refrigerant between the first face and the second face. The refrigerant flow path includes: a refrigerant input part where the refrigerant is put into the refrigerant flow path from a refrigerant circuit; and a refrigerant output part where the refrigerant is put out to the refrigerant circuit from the refrigerant flow path. The first face has a first area where a battery cell group is disposed; and a second area where the battery cell group is not disposed. The refrigerant flow path is constituted ranging from the first area to the second area. The refrigerant output part is disposed in the second area.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present disclosure relates to a vehicle and a heat exchange plate. [Background technology]

[0002] Hybrid vehicles and electric vehicles are equipped with an on-board battery that supplies power to a motor, which serves as a drive source. The vehicle is provided with a heat exchange plate to suppress temperature increases in the on-board battery.

[0003] Known methods for suppressing the temperature rise of an on-board battery include directly cooling the on-board battery with the refrigerant of the car air conditioner and directly cooling the on-board battery with the refrigerant (Patent Documents 1 and 2).Another known method is circulating cooling water together with the refrigerant of the car air conditioner through a heat exchange plate (Patent Document 3). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-44476 [Patent Document 2] Patent No. 6098121 [Patent Document 3] JP 2010-50000 A [Patent Document 4] Chinese Patent Application Publication No. 107112612 Summary of the Invention [Problem to be solved by the invention]

[0005] Temperature rise of an on-board battery needs to be suppressed, but there is an optimum temperature for an on-board battery, and the methods disclosed in the above-mentioned patent documents may cool the on-board battery too much.

[0006] An object of the present disclosure is to provide a vehicle and a heat exchange plate that can maintain an on-board battery at a more appropriate temperature. [Means for solving the problem]

[0007] The vehicle of the present disclosure includes: The car body and a first wheel and a second wheel coupled to the vehicle body; a battery cell group including a plurality of battery cells arranged along a predetermined surface in the vehicle body; a heat exchange plate disposed along the predetermined surface in the vehicle body; an electric motor that drives at least the first wheel using electric power supplied from the battery cell group; A vehicle including a refrigerant circuit having at least a compressor and a condenser, The heat exchange plate is a first surface disposed along the predetermined surface; a second surface opposite the first surface; a coolant flow path that circulates a coolant between the first surface and the second surface; a refrigerant flow path that circulates a refrigerant between the first surface and the second surface, the refrigerant flow path has a refrigerant input portion through which the refrigerant enters the refrigerant flow path from the refrigerant circuit, and a refrigerant output portion through which the refrigerant exits the refrigerant flow path to the refrigerant circuit; the first surface has a first region where the battery cell group is arranged and a second region where the battery cell group is not arranged; the refrigerant flow path is configured across the first region and the second region, The refrigerant output portion is disposed in the second region.

[0008] The heat exchange plate of the present disclosure comprises: The car body and a first wheel and a second wheel coupled to the vehicle body; a battery cell group including a plurality of battery cells arranged along a predetermined surface in the vehicle body; an electric motor that drives at least the first wheel using electric power supplied from the battery cell group; A heat exchange plate that can be installed in a vehicle having a refrigerant circuit having at least a compressor and a condenser, a first surface disposed along the predetermined surface; a second surface opposite the first surface; a coolant flow path that circulates a coolant between the first surface and the second surface; a refrigerant flow path that circulates a refrigerant between the first surface and the second surface, the refrigerant flow path has a refrigerant input portion through which the refrigerant enters the refrigerant flow path from the refrigerant circuit, and a refrigerant output portion through which the refrigerant exits the refrigerant flow path to the refrigerant circuit; the first surface has a first region where the battery cell group is arranged and a second region where the battery cell group is not arranged; the refrigerant flow path is configured across the first region and the second region, The refrigerant output portion is disposed in the second region. [Effects of the Invention]

[0009] According to the present disclosure, a vehicle and a heat exchange plate can be provided that can maintain an on-board battery at a more appropriate temperature. [Brief explanation of the drawings]

[0010] [Figure 1A] FIG. 1 is a plan view showing a configuration example of a vehicle according to a first embodiment; [Figure 1B] FIG. 1 is a left side view showing an example of the configuration of a vehicle according to a first embodiment; [Figure 2] FIG. 1 is a diagram for explaining an example of an electric circuit provided in a vehicle according to a first embodiment. [Figure 3A] FIG. 1 is a perspective view showing a configuration example of a battery pack according to a first embodiment; [Figure 3B] AA cross-sectional view of the battery pack shown in FIG. 3A [Figure 3C] BB cross section of the battery pack shown in FIG. 3A [Figure 4] FIG. 1 is a plan view showing a configuration example of a heat exchange plate according to a first embodiment; [Figure 5A]FIG. 1 is a perspective view showing a first configuration example of a heat exchanger plate according to a first embodiment; [Figure 5B] 5B is a perspective view of the heat exchange plate shown in FIG. 5A taken along the line AA. [Figure 6A] FIG. 10 is a perspective view showing a second configuration example of the heat exchanger plate according to the first embodiment. [Figure 6B] 6B is a perspective view of the heat exchange plate shown in FIG. 6A taken along the line AA. [Figure 7] FIG. 1 is a cross-sectional perspective view showing the configuration of a comparative heat exchange plate. [Figure 8] Schematic diagram showing a modified example of the heat exchanger plate according to the first embodiment. [Figure 9] FIG. 10 is a schematic diagram showing a configuration example of a battery cooling system including a heat exchange plate according to a second embodiment and a refrigerant circuit and a coolant circuit connected to the heat exchange plate. [Figure 10] FIG. 10 is a plan view showing a configuration example of a heat exchange plate according to a second embodiment. [Figure 11] FIG. 10 is a plan view showing a configuration example of a coolant flow path included in a heat exchanger plate according to a second embodiment. [Figure 12] FIG. 10 is a plan view showing a configuration example of a refrigerant flow path included in a heat exchange plate according to a second embodiment. [Figure 13] FIG. 10 is a plan view showing a configuration example of the vicinity of a refrigerant input portion and a refrigerant output portion in a refrigerant flow path according to a second embodiment. [Figure 14] FIG. 14 is a cross-sectional view showing a first example of a cross section taken along line BB of FIG. 13 according to the second embodiment. [Figure 15] FIG. 14 is a cross-sectional view showing a second example of the cross section BB of FIG. 13 according to the second embodiment. [Figure 16] 11 is a diagram showing an example of a pH diagram of a refrigerant flowing through a refrigerant circuit and a refrigerant flow path shown in FIGS. 9 and 10 according to the second embodiment. [Figure 17] FIG. 10 is a plan view showing a first modified example of the configuration of the heat exchanger plate in the second embodiment. [Figure 18] FIG. 10 is a plan view showing a second modified example of the configuration of the heat exchanger plate in the second embodiment. [Figure 19] FIG. 10 is a plan view showing a third modified example of the configuration of the heat exchanger plate in the second embodiment. [Figure 20] FIG. 10 is a plan view showing a fourth modified example of the configuration of the heat exchanger plate in the second embodiment. [Figure 21] FIG. 10 is a plan view showing a fifth modified example of the configuration of the heat exchanger plate according to the second embodiment. [Figure 22] An example of a pH diagram for a refrigerant flowing through a refrigerant circuit and a refrigerant flow path shown in FIG. 21 according to the second embodiment DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present disclosure will be described in detail with appropriate reference to the drawings. However, more detailed description than necessary may be omitted. For example, detailed descriptions of well-known matters and redundant descriptions of substantially identical configurations may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art. Note that the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0012] (Embodiment 1) <Vehicle configuration> Fig. 1A is a plan view showing an example of the configuration of a vehicle 1 according to embodiment 1. Fig. 1B is a left side view showing an example of the configuration of a vehicle 1 according to embodiment 1.

[0013] For ease of explanation, as shown in FIG. 1, the axis extending in the height direction of the vehicle 1 is referred to as the Z-axis. The axis perpendicular to the Z-axis (i.e., parallel to the ground) and extending in the direction of travel of the vehicle 1 is referred to as the Y-axis. The axis perpendicular to the Y-axis and Z-axis (i.e., the axis in the width direction of the vehicle 1) is referred to as the X-axis. For ease of explanation, the positive direction of the Z-axis may be referred to as "up," the negative direction of the Z-axis as "down," the positive direction of the Y-axis as "front," the negative direction of the Y-axis as "rear," the positive direction of the X-axis as "right," and the negative direction of the X-axis as "left." These expressions also apply to other drawings that depict the X, Y, and Z axes. These directional expressions are used for ease of explanation and are not intended to limit the orientation of the structure during actual use.

[0014] The vehicle 1 includes a body 2, wheels 3, an electric motor 4, and a battery pack 10.

[0015] The battery pack 10 is housed in the vehicle body 2. The battery pack 10 has a plurality of battery modules 30 (see FIG. 3A) that can be charged and discharged. Hereinafter, the plurality of battery modules 30 that the battery pack 10 has will be referred to as a battery module group 31. An example of the battery modules 30 is a lithium-ion battery. The battery module group 31 supplies (discharges) stored power to the electric motor 4 and the like. The battery module group 31 may store (charge) power generated by the electric motor 4 using regenerative energy. The battery pack 10 may be housed under the floor in the center of the vehicle body 2, as shown in FIG. 1. Details of the battery pack 10 will be described later.

[0016] The wheels 3 are coupled to the vehicle body 2. Although FIGS. 1A and 1B show a car in which the vehicle 1 has four wheels 3, the vehicle 1 may have at least one wheel 3. For example, the vehicle 1 may be a motorcycle with two wheels 3, or a vehicle with three or five or more wheels 3. Furthermore, one of the multiple wheels 3 provided on the vehicle 1 may be referred to as the first wheel 3a, and another of the multiple wheels 3 other than the first wheel 3a may be referred to as the second wheel 3b. The first wheel 3a may be the front wheel of the vehicle 1, and the second wheel 3b may be the rear wheel of the vehicle 1. The vehicle 1 can move in a predetermined direction (for example, the forward and backward direction) by the first wheel 3a and the second wheel 3b.

[0017] The electric motor 4 drives at least one wheel 3 (for example, the first wheel 3a) using power supplied from the battery module group 31. The vehicle 1 includes at least one electric motor 4. The vehicle 1 may be configured such that the electric motor 4 drives the front wheels (i.e., front-wheel drive). Alternatively, the vehicle 1 may be configured such that the electric motor 4 drives the rear wheels (i.e., rear-wheel drive), or such that the electric motor 4 drives both the front and rear wheels (i.e., four-wheel drive). Alternatively, the vehicle 1 may be configured such that multiple electric motors 4 each drive a respective wheel 3. The electric motor 4 may be installed in a motor room (engine room) located at the front of the vehicle 1.

[0018] <Electric circuit configuration> FIG. 2 is a diagram illustrating an example of an electric circuit included in the vehicle 1 according to the first embodiment.

[0019] The battery pack 10 including the battery module group 31 has a high-voltage connector and a low-voltage connector. In the present disclosure, the high-voltage connector and the low-voltage connector are referred to as electrical connectors without distinction.

[0020] A high-voltage distributor may be connected to the high-voltage connector. A drive inverter, a compressor, an HVAC (Heating, Ventilation, and Air Conditioning), an on-board charger, and a quick charge port may be connected to the high-voltage distributor. A CAN (Controller Area Network) and a 12V power supply system may be connected to the low-voltage connector.

[0021] The drive inverter may be connected to the electric motor 4. That is, the power output from the battery module group 31 may be supplied to the electric motor 4 via a high-voltage connector, a high-voltage distributor, and the drive inverter.

[0022] <Battery pack configuration> Fig. 3A is a perspective view showing an example of the configuration of the battery pack 10 according to embodiment 1. Fig. 3B is a cross-sectional view of the battery pack 10 taken along line AA in Fig. 3A. Fig. 3C is a cross-sectional view of the battery pack taken along line BB in Fig. 3A.

[0023] The battery pack 10 includes a housing 20, a battery module group 31, and a heat exchanger plate 100. The housing 20 houses the battery module group 31 and the heat exchanger plate 100.

[0024] The heat exchanger plate 100 has, for example, a flat, approximately rectangular parallelepiped shape. The heat exchanger plate 100 may be referred to as a heat exchanger. As shown in FIGS. 3B and 3C , the heat exchanger plate 100 includes a first planar member 101 arranged along a predetermined plane, a second planar member 102 arranged along the predetermined plane, and a third planar member 103 arranged along the predetermined plane. The predetermined plane may be the floor surface of the vehicle body 2. The first planar member 101, the second planar member 102, and the third planar member 103 may be made of metal, for example, aluminum. However, the first planar member 101, the second planar member 102, and the third planar member 103 are not limited to being made of metal and may be made of other materials.

[0025] At least a portion of the second planar member 102 is disposed between the first planar member 101 and the third planar member 103. The battery module group 31 is disposed on the opposite side of the second planar member 102 with respect to the first planar member 101. That is, the third planar member 103, the second planar member 102, and the first planar member 101 are disposed in descending order of proximity to the floor surface of the vehicle body 2.

[0026] The heat exchanger plate 100 has a coolant layer 200 that circulates coolant between a first planar member 101 and a second planar member 102, and a refrigerant layer 300 that circulates refrigerant between the second planar member 102 and a third planar member 103. The heat exchanger plate 100 exchanges heat between at least the battery module group 31 and the coolant via the first planar member 101. The heat exchanger plate 100 also exchanges heat between at least the coolant in the coolant layer 200 and the refrigerant in the refrigerant layer 300 via the second planar member 102. An example of the coolant is an antifreeze containing ethylene glycol. An example of the refrigerant is HFC (hydrofluorocarbon).

[0027] In this embodiment, the heat exchanger plate 100 has a configuration in which the coolant layer 200 is disposed on the refrigerant layer 300. However, the heat exchanger plate 100 may have a configuration in which the coolant layer 300 is disposed on the coolant layer 200. The coolant layer 200 may be read as a coolant plate. The refrigerant layer 300 may be read as a refrigerant plate. Details of the configuration of the heat exchanger plate 100 and the details of the configurations of the coolant layer 200 and the refrigerant layer 300 will be described later.

[0028] The heat exchange plate 100 has a coolant input port 121, a coolant output port 122, a refrigerant input port 131, and a refrigerant output port 132 on a front surface 110F, which is the surface facing the traveling direction of the vehicle 1.

[0029] The coolant input portion 121 is an inlet for inputting the coolant from the outside of the heat exchanger plate 100 to the coolant layer 200. The coolant output portion 122 is an outlet for outputting the coolant from the coolant layer 200 to the outside of the heat exchanger plate 100.

[0030] The refrigerant input portion 131 is an inlet for inputting the refrigerant from the outside of the heat exchanger plate 100 to the refrigerant layer 300. The refrigerant output portion 132 is an outlet for outputting the refrigerant from the refrigerant layer 300 to the outside of the heat exchanger plate 100.

[0031] <Details of the heat exchange plate configuration> Fig. 4 is a plan view showing an example of the configuration of the heat exchanger plate 100 according to embodiment 1. Fig. 5A is a perspective view showing a first example of the configuration of the heat exchanger plate 100 according to embodiment 1. Fig. 5B is a perspective view of the AA cross section of the heat exchanger plate 100 shown in Fig. 5A. Fig. 6A is a perspective view showing a second example of the configuration of the heat exchanger plate 100 according to embodiment 1. Fig. 6B is a perspective view of the AA cross section of the heat exchanger plate 100 shown in Fig. 6A. Fig. 7 is a sectional perspective view showing the configuration of a comparative heat exchanger plate.

[0032] As shown in FIG. 4, the heat exchange plate 100 has a wall portion 150 that forms at least a part of the flow path of the coolant in the coolant layer 200.

[0033] At least a portion of the wall 150 of the coolant layer 200 may be arranged in a predetermined direction along a predetermined surface in the coolant layer 200. The predetermined surface may be the floor surface of the vehicle body 2. The predetermined direction of the wall 150 may be a direction (e.g., the Y-axis direction) corresponding to the traveling direction in which the vehicle body can travel using the first wheel 3a and the second wheel 3b. However, the predetermined direction of the wall 150 is not limited to the traveling direction, and may be, for example, a direction perpendicular to the traveling direction (i.e., the left-right direction when facing the traveling direction).

[0034] 4 , the wall portion 150 may have a first wall surface 151, a second wall surface 152 opposite the first wall surface 151, and an end surface 153 connecting the first wall surface 151 and the second wall surface 152. In the coolant layer 200, the coolant may flow in from the coolant input portion 121, travel along the first wall surface 151, then travel along the end surface 153, then travel along the second wall surface 152, and flow out from the coolant output portion 122.

[0035] As shown in FIGS. 5A, 5B, 6A, and 6B, at least a portion of the wall 150 of the coolant layer 200 may be composed of a first protrusion 161 protruding from the first planar member 101 toward the second planar member 102, and a second protrusion 162 protruding from the second planar member 102 toward the first planar member 101. The first protrusion 161 may be formed by pressing the first planar member 101. The second protrusion 162 may be formed by pressing the second planar member 102. In other words, the first protrusion 161 and the second protrusion 162 may be combined with each other to form at least a portion of the wall 150 of the coolant layer 200. The position of the first protrusion 161 will be described later.

[0036] The coolant flow path in the coolant layer 300 may be defined by the shape of the third planar member 103. The coolant flow path may be formed by pressing the third planar member 103.

[0037] 4, the refrigerant flow path may be configured by at least two refrigerant flow paths (hereinafter referred to as input refrigerant flow path 301 and output refrigerant flow path 302) extending in the same direction as a predetermined direction (e.g., the Y-axis direction) of wall portion 150, and a plurality of refrigerant flow paths (hereinafter referred to as branch refrigerant flow paths 303) connecting input refrigerant flow path 301 and output refrigerant flow path 302. Input refrigerant flow path 301 may be connected to refrigerant input portion 131, and output refrigerant flow path 302 may be connected to refrigerant output portion 132. Hereinafter, two adjacent branch refrigerant flow paths 303 may be referred to as first refrigerant flow path 303A and second refrigerant flow path 303B, respectively.

[0038] 4, at least a portion of the wall 150 of the coolant layer 200 and at least a portion of the first refrigerant flow path 303A may intersect at a first intersection 171 when viewed from the normal direction to a predetermined plane (e.g., the floor surface of the vehicle body 2). At least a portion of the wall 150 of the coolant layer 200 and at least a portion of the second refrigerant flow path 303B may intersect at a second intersection 172 when viewed from the normal direction to the predetermined plane (e.g., the floor surface of the vehicle body 2).

[0039] The first protrusion 161 of the first planar member 101 may be disposed corresponding to an intersection where at least a portion of the wall 150 of the coolant layer 200 intersects with at least a portion of the flow path of the refrigerant. For example, the first protrusion 161 may be disposed between the first intersection 171 and the second intersection 172. In this case, the first protrusion 161 may be disposed at a position that does not correspond to one of the plurality of battery modules 30.

[0040] Next, referring to Figure 7, we will explain the problems that occur when the first convex portion 161 is not formed, and further, referring to Figures 5A, 5B, 6A, and 6B, we will explain an example of a wall portion 150 formed by the first convex portion 161 and the second convex portion 162.

[0041] 7, when the wall portion 150 is formed by pressing only the second planar member 102, the refrigerant flowing through the branch refrigerant flow path 303 (first refrigerant flow path 303A) flows into the adjacent branch refrigerant flow path 303 (second refrigerant flow path 303B) through the internal space of the wall portion 150. In this case, the cooling effect targeted by the design of the refrigerant flow path cannot be obtained.

[0042] 5A and 5B, a first convex portion 161 is formed on the first planar member 101 so as to constitute part of the wall portion 150 of the coolant layer 200 between a first intersection 171 (see FIG. 4) where the first refrigerant flow path 303A intersects with the wall portion 150 of the coolant layer 200, and a second intersection 172 (see FIG. 4) where the second refrigerant flow path 303B intersects with the wall portion 150 of the coolant layer 200. When the second convex portion 162 of the second planar member 102 is formed, the portion facing the first convex portion 161 is not extruded. As a result, as shown in FIG. 5B, the second convex portion 162 of the second planar member 102 and the first convex portion 161 of the first planar member 101 fit snugly together to form part of the wall portion 150 of the coolant layer 200. In addition, the internal space of wall portion 150 connecting first refrigerant flow path 303A to second refrigerant flow path 303B is divided by first convex portion 161 formed between first intersection 171 and second intersection 172. This prevents the refrigerant flowing through first refrigerant flow path 303A from passing through the internal space of wall portion 150 and flowing into second refrigerant flow path 303B, or prevents the refrigerant flowing through second refrigerant flow path 303B from passing through the internal space of wall portion 150 and flowing into first refrigerant flow path 303A.

[0043] Alternatively, as shown in FIGS. 6A and 6B , a first convex portion 161 may be formed on the first planar member 101 at a first intersection 171 where the first refrigerant flow path 303A intersects with the wall portion 150 of the coolant layer 200, so as to constitute part of the wall portion 150. For example, the first convex portion 161 is formed on the first planar member 101 so that it is equal to or greater than the width of the first refrigerant flow path 303A in the Y-axis direction at the first intersection 171. Then, when forming the second convex portion 162 of the second planar member 102, the portion facing the first convex portion 161 is not extruded. As a result, as shown in FIG. 6B , the second convex portion 162 of the second planar member 102 and the first convex portion 161 of the first planar member 101 fit snugly together to form the wall portion 150 of the coolant layer 200. In addition, the portion of first intersection 171 that connects first refrigerant channel 303A to the internal space of wall 150 is blocked by first protrusion 161. This prevents the refrigerant flowing through first refrigerant channel 303A from passing through the internal space of wall 150 and flowing into second refrigerant channel 303B, or prevents the refrigerant flowing through second refrigerant channel 303B from passing through the internal space of wall 150 and flowing into first refrigerant channel 303A. Note that second intersection 172 and other intersections may have a similar configuration.

[0044] The first convex portion 161 may be formed on a portion of the first planar member 101 where the battery module 30 is not disposed. If the first convex portion 161 is formed on a portion of the first planar member 101 where the battery module 30 is disposed, the area of ​​the first planar member 101 in contact with the bottom surface of the battery module 30 will be reduced, and the cooling effect of the battery module 30 may be reduced.

[0045] <Modification> FIG. 8 is a schematic diagram showing a modified example of the heat exchanger plate 100 according to the first embodiment.

[0046] 8, the wall 150 of the coolant layer 200 may be formed by the first protrusion 161 formed on the first planar member 101, without forming the second protrusion 162 on the second planar member 102. In this case, the internal space of the wall 150 that connects two adjacent branched refrigerant flow paths 303 as described above is not formed.

[0047] However, as shown in FIG. 8(a), when the battery module 30 is placed on the first convex portion 161 of the first planar member 101, the area of ​​the first planar member 101 that contacts the bottom surface of the battery module 30 is reduced, as described above, and the cooling effect of the battery module 30 may be reduced. Therefore, in a modification of the present embodiment, as shown in FIG. 8(b), the first convex portion 161 of the first planar member 101 may be formed so that the battery module 30 can be placed while avoiding the first convex portion 161 of the first planar member 101. This prevents a reduction in the area of ​​the first planar member 101 that contacts the bottom surface of the battery module 30. This prevents a reduction in the cooling effect of the battery module 30.

[0048] (Embodiment 2) In the second embodiment, the same reference numerals are used for the components already described in the first embodiment, and the description thereof may be omitted. Furthermore, the content of the second embodiment can be combined with the content of the first embodiment.

[0049] The configuration of a heat exchanger plate 100 according to a second embodiment will be described with reference to FIGS. 9 to 15. The heat exchanger plate 100 is mounted on a vehicle 1, as described in the first embodiment. FIG. 9 is a schematic diagram showing a configuration example of a battery cooling system including the heat exchanger plate 100 and a refrigerant circuit 50 and a coolant circuit 40 connected to the heat exchanger plate 100. FIG. 10 is a plan view showing a configuration example of the heat exchanger plate 100. FIG. 11 is a plan view showing a configuration example of a coolant flow path 210 included in the heat exchanger plate 100. FIG. 12 is a plan view showing a configuration example of a refrigerant flow path 310 included in the heat exchanger plate 100. FIG. 13 is a plan view showing a configuration example of the refrigerant flow path 310 near a refrigerant input portion 131 and a refrigerant output portion 132. FIG. 14 is a cross-sectional view showing a first example of a cross section taken along line BB of FIG. 13. FIG. 15 is a cross-sectional view showing a second example of a cross section taken along line BB of FIG. 13. 9 to 12 and FIGS. 17 to 21 described later are plan views of the heat exchange plate 100 viewed from bottom to top (from the negative direction of the Z axis to the positive direction of the Z axis).

[0050] The vehicle 1 includes a coolant circuit 40 having at least a pump 41. The coolant circuit 40 may further include a reservoir tank 42. The coolant circuit 40 is connected to a coolant layer 200 of the heat exchange plate 100. The coolant circulates through the coolant circuit 40 and the coolant layer 200.

[0051] The vehicle 1 includes a refrigerant circuit 50 having at least a compressor 51 and a condenser 52. The refrigerant circuit 50 may further include an air conditioning evaporator 53 for the vehicle interior. The refrigerant circuit 50 is connected to the refrigerant layer 300 of the heat exchange plate 100. The refrigerant circulates through the refrigerant circuit 50 and the refrigerant layer 300.

[0052] The heat exchange plate 100 has a first surface 181 arranged along a predetermined plane and a second surface 182 opposite to the first surface 181. In this embodiment, the first surface 181 will be described as the upper surface and the second surface 182 as the lower surface. However, the first surface 181 may be the lower surface and the second surface 182 may be the upper surface. The predetermined surface may also be the floor surface of the vehicle body 2.

[0053] The heat exchanger plate 100 has a coolant layer 200 that circulates a coolant between the first surface 181 and the second surface 182. In addition, the heat exchanger plate 100 has a refrigerant layer 300 that circulates a refrigerant between the first surface 181 and the second surface 182. In this embodiment, a configuration in which the coolant layer 200 is provided on the refrigerant layer 300 will be described. However, a configuration in which the coolant layer 200 is provided on the coolant layer 200 may also be used.

[0054] The first surface 181 has a first region where the battery cell group 32 is arranged and a second region where the battery cell group 32 is not arranged. That is, the battery cell group 32 does not have to be arranged in the second region of the first surface 181. The first region and the second region may be regions when viewed from the normal direction of a predetermined surface (for example, the floor surface of the vehicle body 2). Note that, in the present embodiment, the battery cell group 32 is described as being arranged in the first region, but a configuration may also be adopted in which a battery module group 31 including the battery cell group 32 is arranged in the first region. The battery pack 10 may include a plurality of battery module groups 31.

[0055] The refrigerant layer 300 has a refrigerant input 131 through which refrigerant enters the refrigerant layer 300 from the refrigerant circuit 50 and a refrigerant output 132 through which refrigerant exits the refrigerant layer 300 to the refrigerant circuit 50 .

[0056] The coolant layer 200 has a coolant input 121 that enters the coolant layer 200 from the coolant circuit 40 and a coolant output 122 that exits the coolant layer 200 to the coolant circuit 40 .

[0057] At least one of the coolant input port 121 and the coolant output port 122 is disposed in the second region.

[0058] The coolant flow path 310 in the coolant layer 300 is configured across the first region and the second region.

[0059] As shown in Figures 13 to 15, the refrigerant input port 131 and the refrigerant output port 132 are connected to the refrigerant layer 300 by a refrigerant flange 401. The refrigerant flange 401 may be joined to a plate 402 that separates the refrigerant layer 300 and the coolant layer 200, as shown in Figure 14, or may be joined to a plate that forms the upper surface (first surface 181) of the coolant layer 200, as shown in Figure 15. As shown in Figure 14 or 15, the refrigerant output port 132 is located in the second region. In addition, as shown in Figure 14 or 15, the refrigerant input port 131 may be located in a position in the second region closer to the first region than the refrigerant output port 132.

[0060] For example, the refrigerant flow path 310 in the refrigerant layer 300 includes a first refrigerant flow path 311 connected to the refrigerant input port 131, a plurality of branch refrigerant flow paths 315 branching from the first refrigerant flow path 311, a second refrigerant flow path 312 where the plurality of branch refrigerant flow paths 315 converge, and a third refrigerant flow path 313 connecting the second refrigerant flow path 312 to the refrigerant output port 132. Here, at least a portion of the third refrigerant flow path 313 is included in the second region.

[0061] For example, the coolant flow path 210 in the coolant layer 200 includes a first coolant flow path 211 connected to the coolant input unit 121 and arranged along a predetermined direction, and a second coolant flow path 212 connected to the first coolant flow path 211, arranged along the predetermined direction, and connected to the coolant output unit 122. The predetermined direction may be the traveling direction of the vehicle 1. At least a portion of the first coolant flow path 211 may intersect (e.g., perpendicular to) at least a portion of the branch refrigerant flow path 315 in the second region when viewed from the normal direction to a predetermined plane (e.g., the floor surface of the vehicle body 2). At least a portion of the second coolant flow path 212 may intersect (e.g., perpendicular to) at least a portion of the branch refrigerant flow path 315 in the second region when viewed from the normal direction to the predetermined plane.

[0062] According to the above-described configuration, heat exchange is possible between the refrigerant flowing through the refrigerant flow path 310 and the coolant flowing through the coolant flow path 210 in the second region that is not subjected to the thermal load from the battery cell group 32.

[0063] For example, the minimum temperature of the coolant in the first region is T1, and the temperature rise of the coolant due to flowing through the coolant circuit 40 outside the heat exchanger plate 100 is T2. In this case, it is possible to lower the temperature of the coolant in the second region to T1-T2. In other words, the minimum temperature of the coolant in the second region may be T1-T2. As a result, by appropriately configuring the second region that is not subjected to the thermal load from the battery cell group 32 and controlling the heat exchange in the second region, the minimum temperature of the coolant in the first region can be made more appropriate. Therefore, the battery cell group 32 arranged in the first region can be made to have a more appropriate temperature.

[0064] At least one of heat transfer fins and heat transfer ribs may be provided in the refrigerant flow path 310 to promote heat exchange. At least one of heat transfer fins and heat transfer ribs may be provided in the portion of the coolant flow path 210 adjacent to the refrigerant flow path 310 to promote heat exchange.

[0065] Figure 16 shows an example of a pH diagram for the refrigerant flowing through the refrigerant circuit 50 and the refrigerant flow path 310 shown in Figures 9 and 10. In the pH diagram shown in Figure 16, the vertical axis represents pressure and the horizontal axis represents specific enthalpy. As described above, Figure 16 is a pH diagram for a configuration in which the refrigerant output port 132 is located in the second region and the refrigerant input port 131 is located in the second region closer to the first region than the refrigerant output port 132.

[0066] For example, as shown in Figure 16, in the first region, the refrigerant temperature drops from 20 degrees to 10 degrees, and the refrigerant pressure drops from 0.47 MPaG to 0.31 MPaG. Then, in the second region, for example, the refrigerant temperature drops further from 10 degrees to 5 degrees, and the refrigerant pressure drops from 0.31 MPaG to 0.25 MPaG.

[0067] As shown in the configuration of refrigerant flow path 310 in Figure 12, the pressure of the refrigerant can decrease due to pressure loss in the downstream portion of refrigerant flow path 310. If the downstream portion of refrigerant flow path 310 were located in the first region, a local temperature drop could occur in the first region. In contrast, in this embodiment, the downstream portion of refrigerant flow path 310 is located in the second region. This makes it possible to prevent a local temperature drop in the first region.

[0068] Furthermore, in the most downstream portion of the refrigerant flow path 310 (for example, near the refrigerant output section 132), the refrigerant may gasify, causing a temperature rise. If the most downstream portion of the refrigerant flow path 310 were located in the first region, a local temperature rise would occur in the first region. In contrast, in this embodiment, the most downstream portion of the refrigerant flow path 310 is located in the second region. This makes it possible to prevent a local temperature rise in the first region.

[0069] Furthermore, if dryout is promoted in the first region, a temperature increase may occur in the first region. In contrast, in this embodiment, dryout can be promoted in the second region. This ensures superheat at the refrigerant output port 132 (i.e., the evaporator outlet) without increasing the temperature in the first region, thereby increasing the refrigerant flow rate. For example, a thermal expansion valve (TXV) may be provided near the refrigerant output port 132 of the second region. The thermal expansion valve may detect the temperature of the refrigerant near the refrigerant output port 132 of the second region (i.e., the outlet of the second region) at point P in FIG. 16 and adjust the refrigerant flow rate according to the detected temperature. For example, the thermal expansion valve may increase the refrigerant flow rate when the detected refrigerant temperature is higher than a predetermined first threshold. The thermal expansion valve may also decrease the refrigerant flow rate when the detected refrigerant temperature is lower than a predetermined second threshold.

[0070] FIG. 17 is a plan view showing a first modified example of the configuration of the heat exchanger plate 100. As shown in FIG.

[0071] 17, the first surface 181 of the heat exchanger plate 100 may further have a third region, which is a region where no battery cell group 32 is arranged, on the opposite side of the first region from the second region. The refrigerant flow path 310 in the refrigerant layer 300 may be configured across the first region, the second region, and the third region.

[0072] For example, the end of the first refrigerant flow path 311 opposite to the refrigerant input portion 131 may be extended to the third region, and a fourth refrigerant flow path 314 may be provided in the third region, connecting from that end to the second refrigerant flow path 312.

[0073] The refrigerant does not flow easily in the portion of the refrigerant flow path 310 far from the refrigerant input port 131, and the temperature of the coolant tends to rise easily in the portion that turns from the first coolant flow path 211 to the second coolant flow path 212. In contrast, with the configuration shown in Fig. 17, in the third region that is not subjected to the thermal load of the battery cell group 32, heat exchange is possible between the refrigerant flowing through the fourth refrigerant flow path 314 and the coolant flowing in the portion that turns from the first coolant flow path 211 to the second coolant flow path 212. Therefore, the coolant is cooled in the third region, improving the uniformity of the coolant temperature.

[0074] FIG. 18 is a plan view showing a second modified example of the configuration of the heat exchanger plate 100. As shown in FIG.

[0075] 18, refrigerant flow path 310 in refrigerant layer 300 may further include a throttle section 403 that throttles the flow rate of the refrigerant between second refrigerant flow path 312 and third refrigerant flow path 313. The pressure of the refrigerant in third refrigerant flow path 313 may be lower than the pressure of the refrigerant in second refrigerant flow path 312. This can further reduce the evaporation temperature of the refrigerant in the second region.

[0076] FIG. 19 is a plan view showing a third modified example of the configuration of the heat exchanger plate 100. As shown in FIG.

[0077] The heat exchange plate 100 may include a thermally conductive member having a first thermal conductivity disposed between the battery cell group 32 and the heat exchange plate 100 in at least a portion of a first region of the heat exchange plate 100. In addition, as shown in FIG. 19 , the heat exchange plate 100 may include a heat insulating member 404 having a second thermal conductivity in at least a portion of a second region of the heat exchange plate 100. The first thermal conductivity may be greater than the second thermal conductivity. For example, the first thermal conductivity may be 100 times or more greater than the second thermal conductivity.

[0078] In this way, by providing the heat insulating member 404 in at least a part of the second region, it is possible to prevent condensation from occurring in the second region, which becomes cold. In addition, by providing the heat insulating member 404 in at least a part of the second region, it is possible to prevent condensation that occurs in the second region from approaching the high-voltage electrical system that outputs power from the battery cell group 32.

[0079] FIG. 20 is a plan view showing a fourth modified example of the configuration of the heat exchanger plate 100. As shown in FIG.

[0080] As shown in FIG. 20, the heat exchanger plate 100 may further include a condensed water recovery section 405 in the second region of the heat exchanger plate 100 for recovering condensed water generated in the portion of the heat exchanger plate 100 including the second region.

[0081] As a result, condensed water that may occur in the second region, which becomes cold, is collected in the condensed water collection section 405, thereby preventing the condensed water that occurs in the second region from approaching the high-voltage electrical system that outputs power from the battery cell group 32.

[0082] In addition, the condensed water recovery unit 405 may be configured to discharge the recovered condensed water into a condensed water storage unit (not shown) provided outside the battery pack 10. The moisture stored in the condensed water storage unit may be adsorbable by a desiccant.

[0083] 18, 19, and 20 may be combined as appropriate. For example, the heat exchanger plate 100 may be configured to include at least two of the throttle section 403 shown in Fig. 18, the heat insulating member 404 shown in Fig. 19, and the condensed water recovery section 405 shown in Fig. 29.

[0084] Fig. 21 is a plan view showing a fifth modified example of the configuration of the heat exchanger plate 100. Fig. 22 shows an example of a pH diagram for the refrigerant flowing through the refrigerant circuit 50 and the refrigerant flow path 310 shown in Fig. 21. In the pH diagram shown in Fig. 21, the vertical axis represents pressure and the horizontal axis represents specific enthalpy.

[0085] 21 , the refrigerant flow path 310 in the refrigerant layer 300 of the heat exchanger plate 100 may include a third refrigerant flow path 313 connected to the refrigerant input port 131, a second refrigerant flow path 312 connected to the third refrigerant flow path 313 and arranged along a predetermined direction, a plurality of branch refrigerant flow paths 315 branching from the second refrigerant flow path 312, and a first refrigerant flow path 311 where the plurality of branch refrigerant flow paths 315 join and are connected to the refrigerant output port 132. At least a portion of the third refrigerant flow path 313 may be included in the second region. That is, the refrigerant flowing in from the refrigerant input port 131 flows in this order through the third refrigerant flow path 313, the second refrigerant flow path 312, the branch refrigerant flow path 315, and the first refrigerant flow path 311, and then flows out from the refrigerant output port 132.

[0086] Due to pressure loss in the refrigerant flow path 310, the temperature of the refrigerant tends to decrease from the refrigerant input port 131 to the refrigerant output port 132, so the refrigerant temperatures may have the following relationship.

[0087] Temperature of the refrigerant at the refrigerant input port 131 > Temperature of the coolant at the coolant input port 121 > Temperature of the coolant at the coolant output port 122 > Temperature of the refrigerant at the refrigerant output port 132

[0088] In this case, according to the configuration shown in FIG. 21, the refrigerant that has entered the refrigerant flow path 310 exchanges heat with the cooling liquid in the second region, thereby cooling the refrigerant as shown in FIG. 22, thereby improving the cooling efficiency in the first region.

[0089] The heat exchanger plate 100 shown in Fig. 21 can be appropriately combined with the configurations shown in Fig. 18, Fig. 19, and Fig. 20. For example, the heat exchanger plate 100 shown in Fig. 21 may be configured to include at least one of the throttle section 403 shown in Fig. 18, the heat insulating member 404 shown in Fig. 19, and the condensed water recovery section 405 shown in Fig. 29.

[0090] Although the embodiments have been described above with reference to the accompanying drawings, the present disclosure is not limited to such examples. It is clear that a person skilled in the art can conceive of various modifications, alterations, substitutions, additions, deletions, and equivalents within the scope of the claims, and it is understood that these also fall within the technical scope of the present disclosure. Furthermore, the components in the above-described embodiments may be combined in any manner without departing from the spirit of the invention. [Industrial Applicability]

[0091] The technology of the present disclosure is useful for regulating the temperature of an on-board battery. [Explanation of symbols]

[0092] 1 vehicle 2. Body 3 wheels 3a 1st wheel 3b 2nd wheel 4 Electric motor 10 Battery pack 20 Case 30 Battery Module 31 Battery module group 32 Battery cell group 40 Coolant circuit 41 Pump 42 Reservoir tank 50 Refrigerant circuit 51 Compressor 52 Capacitor 53 Air conditioning evaporator 100 Heat Exchange Plate 101 first planar member 102 second planar member 103 Third planar member 110F front 121 Coolant input section 122 Coolant output section 131 Refrigerant input section 132 Refrigerant output section 150 Wall section 151 First Wall 152 Second wall 153 End face 161 First convex part 162 Second convex part 171 1st intersection 172 Second intersection 200 Coolant layer 210 Coolant flow path 211 1st coolant flow path 212 2nd coolant flow path 300 Refrigerant layer 301 Input refrigerant flow path 302 Output refrigerant flow path 303 Branched refrigerant flow path 303A First refrigerant flow path 303B Second refrigerant flow path 310 Refrigerant flow path 311 First refrigerant flow path 312 Second refrigerant flow path 313 Third refrigerant flow path 314 Fourth refrigerant channel 315 Branched refrigerant flow path 401 Refrigerant flange 402 Plate 403 Constriction section 404 Heat insulating materials 405 Condensate recovery section

Claims

1. The car body and a first wheel and a second wheel coupled to the vehicle body; a battery cell group including a plurality of battery cells arranged along a predetermined surface in the vehicle body; a heat exchange plate disposed along the predetermined surface in the vehicle body; an electric motor that drives at least the first wheel using electric power supplied from the battery cell group; A vehicle including a refrigerant circuit having at least a compressor and a condenser, The heat exchange plate is a first surface disposed along the predetermined plane; a second surface opposite the first surface; a coolant flow path for circulating a coolant between the first surface and the second surface; a refrigerant flow path that circulates a refrigerant between the first surface and the second surface, the refrigerant flow path has a refrigerant input portion through which the refrigerant enters the refrigerant flow path from the refrigerant circuit, and a refrigerant output portion through which the refrigerant exits the refrigerant flow path to the refrigerant circuit; the first surface has a first region in which the battery cell group is arranged and a second region in which the battery cell group is not arranged, the coolant flow path is configured across the first region and the second region, the refrigerant output portion is disposed in the second region, a heat conduction member having a first thermal conductivity and disposed between the battery cell group and the heat exchanger plate in at least a portion of the first region of the heat exchanger plate; a heat insulating member having a second thermal conductivity in at least a portion of the second region of the heat exchange plate; the first thermal conductivity is greater than the second thermal conductivity; vehicle.

2. 2. The vehicle according to claim 1, The refrigerant input portion is disposed in the second region closer to the first region than the refrigerant output portion. vehicle.

3. 3. The vehicle according to claim 1 or 2, the vehicle has a coolant circuit having at least a pump; the coolant flow path has a coolant input from the coolant circuit into the coolant flow path and a coolant output from the coolant flow path to the coolant circuit; At least one of the coolant input port and the coolant output port is disposed in the second region. vehicle.

4. A vehicle body, a first wheel and a second wheel coupled to the vehicle body; a battery cell group including a plurality of battery cells arranged along a predetermined surface in the vehicle body; a heat exchange plate disposed along the predetermined surface in the vehicle body; an electric motor that drives at least the first wheel using electric power supplied from the battery cell group; A vehicle including a refrigerant circuit having at least a compressor and a condenser, The heat exchange plate is a first surface disposed along the predetermined plane; a second surface opposite the first surface; a coolant flow path for circulating a coolant between the first surface and the second surface; a refrigerant flow path that circulates a refrigerant between the first surface and the second surface, the refrigerant flow path has a refrigerant input portion through which the refrigerant enters the refrigerant flow path from the refrigerant circuit, and a refrigerant output portion through which the refrigerant exits the refrigerant flow path to the refrigerant circuit; the first surface has a first region in which the battery cell group is arranged and a second region in which the battery cell group is not arranged, the coolant flow path is configured across the first region and the second region, the refrigerant output portion is disposed in the second region, The second region of the heat exchange plate further includes a condensed water recovery section that recovers condensed water generated in a portion of the heat exchange plate including the second region. vehicle.

5. A vehicle according to any one of claims 1 to 4, the first surface further includes a third region on the opposite side of the first region from the second region, the third region being a region in which the battery cell group is not disposed; The refrigerant flow path is configured across the first region, the second region, and the third region. vehicle.

6. A vehicle body, a first wheel and a second wheel coupled to the vehicle body; a battery cell group including a plurality of battery cells arranged along a predetermined surface in the vehicle body; a heat exchange plate disposed along the predetermined surface in the vehicle body; an electric motor that drives at least the first wheel using electric power supplied from the battery cell group; A vehicle including a refrigerant circuit having at least a compressor and a condenser, The heat exchange plate is a first surface disposed along the predetermined plane; a second surface opposite the first surface; a coolant flow path for circulating a coolant between the first surface and the second surface; a refrigerant flow path that circulates a refrigerant between the first surface and the second surface, the refrigerant flow path has a refrigerant input portion through which the refrigerant enters the refrigerant flow path from the refrigerant circuit, and a refrigerant output portion through which the refrigerant exits the refrigerant flow path to the refrigerant circuit; the first surface has a first region in which the battery cell group is arranged and a second region in which the battery cell group is not arranged, the coolant flow path is configured across the first region and the second region, the vehicle has a coolant circuit having at least a pump; the coolant flow path has a coolant input from the coolant circuit into the coolant flow path and a coolant output from the coolant flow path to the coolant circuit; At least one of the coolant input port and the coolant output port is disposed in the second region; The refrigerant flow path is a first refrigerant flow path connected to the refrigerant input portion; a plurality of branch refrigerant flow paths branching from the first refrigerant flow path; a second refrigerant flow path where the plurality of branched refrigerant flow paths join; a third refrigerant flow path connecting the second refrigerant flow path to the refrigerant output portion, At least a portion of the third refrigerant flow path is included in the second region, The refrigerant flow path further includes a throttle portion between the second refrigerant flow path and the third refrigerant flow path that throttles the flow rate of the refrigerant. vehicle.

7. 7. A vehicle according to claim 6, The pressure of the refrigerant in the third refrigerant flow path is lower than the pressure of the refrigerant in the second refrigerant flow path. vehicle.

8. 8. The vehicle according to claim 6 or 7, The coolant flow path is a first coolant flow path connected to the coolant input portion and arranged along a predetermined direction; a second coolant flow path connected to the first coolant flow path, arranged along the predetermined direction, and connected to a coolant output port; At least a portion of the first coolant flow path intersects at least a portion of the branch refrigerant flow path in the second region when viewed from a normal direction of the predetermined plane, At least a portion of the second coolant flow path intersects with at least a portion of the branch refrigerant flow path in the second region when viewed from a normal direction of the predetermined plane. vehicle.

9. The car body and a first wheel and a second wheel coupled to the vehicle body; a battery cell group including a plurality of battery cells arranged along a predetermined surface in the vehicle body; an electric motor that drives at least the first wheel using electric power supplied from the battery cell group; A heat exchange plate that can be installed in a vehicle having a refrigerant circuit having at least a compressor and a condenser, a first surface disposed along the predetermined plane; a second surface opposite the first surface; a coolant flow path for circulating a coolant between the first surface and the second surface; a refrigerant flow path that circulates a refrigerant between the first surface and the second surface, the refrigerant flow path has a refrigerant input portion through which the refrigerant enters the refrigerant flow path from the refrigerant circuit, and a refrigerant output portion through which the refrigerant exits the refrigerant flow path to the refrigerant circuit; the first surface has a first region in which the battery cell group is arranged and a second region in which the battery cell group is not arranged, the coolant flow path is configured across the first region and the second region, the refrigerant output portion is disposed in the second region, a heat conduction member having a first thermal conductivity and disposed between the battery cell group and the heat exchange plate in at least a portion of the first region; a heat insulating member having a second thermal conductivity in at least a portion of the second region; the first thermal conductivity is greater than the second thermal conductivity; Heat exchange plate.

10. 10. The heat exchange plate according to claim 9, The refrigerant input portion is disposed in the second region closer to the first region than the refrigerant output portion. Heat exchange plate.

11. 11. The heat exchanger plate according to claim 9 or claim 10, the vehicle has a coolant circuit having at least a pump; the coolant flow path has a coolant input from the coolant circuit into the coolant flow path and a coolant output from the coolant flow path to the coolant circuit; At least one of the coolant input port and the coolant output port is disposed in the second region. Heat exchange plate.

12. A vehicle body, a first wheel and a second wheel coupled to the vehicle body; a battery cell group including a plurality of battery cells arranged along a predetermined surface in the vehicle body; an electric motor that drives at least the first wheel using electric power supplied from the battery cell group; A heat exchange plate that can be installed in a vehicle having a refrigerant circuit having at least a compressor and a condenser, a first surface disposed along the predetermined plane; a second surface opposite the first surface; a coolant flow path for circulating a coolant between the first surface and the second surface; a refrigerant flow path that circulates a refrigerant between the first surface and the second surface, the refrigerant flow path has a refrigerant input portion through which the refrigerant enters the refrigerant flow path from the refrigerant circuit, and a refrigerant output portion through which the refrigerant exits the refrigerant flow path to the refrigerant circuit; the first surface has a first region in which the battery cell group is arranged and a second region in which the battery cell group is not arranged, the coolant flow path is configured across the first region and the second region, the refrigerant output portion is disposed in the second region, The second region further includes a condensed water recovery section that recovers condensed water generated in a portion of the heat exchange plate including the second region. Heat exchange plate.

13. 13. A heat exchanger plate according to any one of claims 9 to 12, the first surface further includes a third region on the opposite side of the first region from the second region, the third region being a region in which the battery cell group is not disposed; The refrigerant flow path is configured across the first region, the second region, and the third region. Heat exchange plate.

14. A vehicle body, a first wheel and a second wheel coupled to the vehicle body; a battery cell group including a plurality of battery cells arranged along a predetermined surface in the vehicle body; an electric motor that drives at least the first wheel using electric power supplied from the battery cell group; A heat exchange plate that can be installed in a vehicle having a refrigerant circuit having at least a compressor and a condenser, a first surface disposed along the predetermined plane; a second surface opposite the first surface; a coolant flow path for circulating a coolant between the first surface and the second surface; a refrigerant flow path that circulates a refrigerant between the first surface and the second surface, the refrigerant flow path has a refrigerant input portion through which the refrigerant enters the refrigerant flow path from the refrigerant circuit, and a refrigerant output portion through which the refrigerant exits the refrigerant flow path to the refrigerant circuit; the first surface has a first region in which the battery cell group is arranged and a second region in which the battery cell group is not arranged, the coolant flow path is configured across the first region and the second region, the refrigerant output portion is disposed in the second region, The refrigerant flow path is a first refrigerant flow path connected to the refrigerant input portion; a plurality of branch refrigerant flow paths branching from the first refrigerant flow path; a second refrigerant flow path where the plurality of branched refrigerant flow paths join; a third refrigerant flow path connecting the second refrigerant flow path to the refrigerant output portion, At least a portion of the third refrigerant flow path is included in the second region, The refrigerant flow path further includes a throttle portion between the second refrigerant flow path and the third refrigerant flow path that throttles the flow rate of the refrigerant. Heat exchange plate.

15. 15. The heat exchange plate according to claim 14, The pressure of the refrigerant in the third refrigerant flow path is lower than the pressure of the refrigerant in the second refrigerant flow path. Heat exchange plate.

16. 16. A heat exchanger plate according to claim 14 or claim 15, The coolant flow path is a first coolant flow path connected to the coolant input portion and arranged along a predetermined direction; a second coolant flow path connected to the first coolant flow path, arranged along the predetermined direction, and connected to a coolant output port; At least a portion of the first coolant flow path intersects at least a portion of the branch refrigerant flow path in the second region when viewed from a normal direction of the predetermined plane, At least a portion of the second coolant flow path intersects with at least a portion of the branch refrigerant flow path in the second region when viewed from a normal direction of the predetermined plane. Heat exchange plate.

Images