Vehicle and heat exchange plate

Abstract

In a heat exchange plate, a refrigerant layer includes: a first refrigerant flow path and a second refrigerant flow path; and a third refrigerant flow path disposed between the first refrigerant flow path and the second refrigerant flow path, the coolant layer including: a first coolant flow path and a second coolant flow path; a first connection coolant flow path that connects a portion of the first coolant flow path where a distance from the second coolant flow path is smaller than a distance from the third coolant flow path and a portion of the second coolant flow path where a distance from the third coolant flow path is smaller than a distance from the second coolant flow path; and a second connection coolant flow path that connects a portion of the first coolant flow path where a distance from the third coolant flow path is smaller than a distance from the second coolant flow path and a portion of the second coolant flow path where a distance from the first coolant flow path is smaller than a distance from the third coolant flow path.

Description

Technical Field

[0001] The invention relates to a vehicle and a heat exchange plate. Background Art

[0002] The following structure is disclosed in Patent Document 1. A power supply device for a vehicle comprises: a battery block, which is formed by connecting a plurality of battery cells; a cooling plate, which is thermally coupled to the battery cells of the battery block and cools the battery cells using the supplied refrigerant; a cooling mechanism, which supplies the refrigerant to the cooling plate; and a control circuit, which controls the cooling mechanism and controls the cooling state of the cooling plate. The cooling plate is provided with a hollow portion of a liquid-tight structure inside, and the hollow portion is filled with a coolant that makes the temperature of the cooling plate uniform. In addition, the cooling plate is provided with a heat exchanger that cools the coolant using the heat of vaporization of the refrigerant. The power supply device cools the heat exchanger using the heat of vaporization of the refrigerant circulating in the heat exchanger of the cooling plate, and the heat exchanger cools the coolant so that the cooling plate cools the battery cells.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2010-50000

[0006] Patent Document 2: Japanese Patent Application Publication No. 2008-44476

[0007] Patent Document 3: Japanese Patent No. 6098121 Summary of the invention

[0008] Problem that the invention aims to solve

[0009] If the temperature of the plate cooling the battery for a vehicle is made uneven, the battery will be cooled unevenly, and the uneven cooling of the battery will have an adverse effect on the performance and life of the battery.

[0010] An object of the present invention is to provide a technology capable of cooling a battery for a vehicle more uniformly.

[0011] Solutions for solving problems

[0012] One aspect of the present invention provides a vehicle comprising:

[0013] Car body;

[0014] A first wheel and a second wheel, which are combined with the vehicle body;

[0015] a secondary battery arranged along a predetermined surface in the vehicle body;

[0016] a heat exchange plate disposed along the predetermined surface in the vehicle body; and

[0017] a motor that drives at least the first wheel using electric power supplied from the secondary battery,

[0018] The vehicle is capable of moving in a predetermined direction using the first wheel and the second wheel.

[0019] In the vehicle,

[0020] The heat exchange plate has:

[0021] a first surface, which is arranged along the predetermined surface and is capable of exchanging heat with the secondary battery;

[0022] a second surface arranged along the predetermined surface and located on the opposite side of the first surface;

[0023] a first end portion, which is an end portion in the predetermined direction;

[0024] a second end portion located on the opposite side of the first end portion in the predetermined direction;

[0025] A refrigerant input portion, which is disposed at the first end portion and allows the refrigerant to enter the heat exchange plate;

[0026] A refrigerant output portion, which is disposed at the first end portion and allows the refrigerant to exit from the heat exchange plate;

[0027] a first refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction;

[0028] a second refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction;

[0029] a third refrigerant flow path connected to the refrigerant input portion and arranged between the first surface and the second surface along the predetermined direction between the first refrigerant flow path and the second refrigerant flow path;

[0030] a first connecting refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface; and

[0031] a second connecting refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface,

[0032] The refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the first connected refrigerant flow path and the first refrigerant flow path, and the refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the second connected refrigerant flow path and the second refrigerant flow path,

[0033] The heat exchange plate also has:

[0034] A first cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting cooling liquid relative to the heat exchange plate;

[0035] a second cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting the cooling liquid relative to the heat exchange plate;

[0036] a first cooling liquid flow path connected to the first cooling liquid input / output portion and arranged between the first surface and the second surface along the predetermined direction;

[0037] a second cooling liquid flow path connected to the second cooling liquid input and output portion and arranged between the first surface and the second surface along the predetermined direction;

[0038] a first connecting coolant flow path that connects, at the second end, a portion of the first coolant flow path that is closer to the second refrigerant flow path than to the third refrigerant flow path and a portion of the second coolant flow path that is closer to the third refrigerant flow path than to the second refrigerant flow path; and

[0039] a second connecting coolant flow path, which connects at the second end a portion of the first coolant flow path whose distance from the third refrigerant flow path is smaller than that from the second refrigerant flow path and a portion of the second coolant flow path whose distance from the first refrigerant flow path is smaller than that from the third refrigerant flow path,

[0040] The coolant entering the heat exchange plate from the first coolant input and output part can move from the first coolant flow path to the second coolant input and output part via the first connecting coolant flow path and the second coolant flow path, and the coolant entering the heat exchange plate from the first coolant input and output part can move from the first coolant flow path to the second coolant input and output part via the second connecting coolant flow path and the second coolant flow path.

[0041] One aspect of the present invention provides a heat exchange plate that can be installed in a vehicle, the vehicle comprising:

[0042] Car body;

[0043] A first wheel and a second wheel, which are combined with the vehicle body;

[0044] a secondary battery arranged along a predetermined surface in the vehicle body; and

[0045] a motor that drives at least the first wheel using electric power supplied from the secondary battery,

[0046] The vehicle is capable of moving in a predetermined direction using the first wheel and the second wheel.

[0047] The heat exchange plate includes:

[0048] a first surface, which is arranged along the predetermined surface and is capable of exchanging heat with the secondary battery;

[0049] a second surface arranged along the predetermined surface and located on the opposite side of the first surface;

[0050] a first end portion, which is an end portion in the predetermined direction;

[0051] a second end portion located on the opposite side of the first end portion in the predetermined direction;

[0052] A refrigerant input portion, which is disposed at the first end portion and allows the refrigerant to enter the heat exchange plate;

[0053] A refrigerant output portion, which is disposed at the first end portion and allows the refrigerant to exit from the heat exchange plate;

[0054] a first refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction;

[0055] a second refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction;

[0056] a third refrigerant flow path connected to the refrigerant input portion and arranged between the first surface and the second surface along the predetermined direction between the first refrigerant flow path and the second refrigerant flow path;

[0057] a first connecting refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface; and

[0058] a second connecting refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface,

[0059] The refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the first connected refrigerant flow path and the first refrigerant flow path, and the refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the second connected refrigerant flow path and the second refrigerant flow path,

[0060] The heat exchange plate also has:

[0061] A first cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting cooling liquid relative to the heat exchange plate;

[0062] a second cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting the cooling liquid relative to the heat exchange plate;

[0063] a first cooling liquid flow path connected to the first cooling liquid input / output portion and arranged between the first surface and the second surface along the predetermined direction;

[0064] a second cooling liquid flow path connected to the second cooling liquid input and output portion and arranged between the first surface and the second surface along the predetermined direction;

[0065] a first connecting coolant flow path that connects, at the second end, a portion of the first coolant flow path that is closer to the second refrigerant flow path than to the third refrigerant flow path and a portion of the second coolant flow path that is closer to the third refrigerant flow path than to the second refrigerant flow path; and

[0066] a second connecting coolant flow path, which connects at the second end a portion of the first coolant flow path whose distance from the third refrigerant flow path is smaller than that from the second refrigerant flow path and a portion of the second coolant flow path whose distance from the first refrigerant flow path is smaller than that from the third refrigerant flow path,

[0067] The coolant entering the heat exchange plate from the first coolant input and output part can move from the first coolant flow path to the second coolant input and output part via the first connecting coolant flow path and the second coolant flow path, and the coolant entering the heat exchange plate from the first coolant input and output part can move from the first coolant flow path to the second coolant input and output part via the second connecting coolant flow path and the second coolant flow path.

[0068] Effects of the Invention

[0069] According to the present invention, a vehicle battery can be cooled more uniformly. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 It is a plan view showing a structural example of the vehicle according to the first embodiment.

[0071] Figure 2 It is a left side view showing a structural example of the vehicle according to the first embodiment.

[0072] Figure 3 This is a diagram for explaining an example of a circuit included in the vehicle according to the first embodiment.

[0073] Figure 4 It is a perspective view showing a structural example of the battery pack according to the first embodiment.

[0074] Figure 5 yes Figure 4 AA cross-sectional view of a battery pack is shown.

[0075] Figure 6 It is a plan view showing a structural example of the refrigerant layer according to Embodiment 1.

[0076] Figure 7 It is a plan view showing a structural example of the coolant layer according to the first embodiment.

[0077] Figure 8 This is a plan view showing an example of the positional relationship between the refrigerant layer and the cooling liquid layer according to the first embodiment.

[0078] Fig. 9 This is a perspective view showing a structural example in which the first connecting coolant flow path and the second connecting coolant flow path are three-dimensionally intersected in the first embodiment.

[0079] Fig.10 This is a plan view showing a structural example in which the first connecting coolant flow path and the second connecting coolant flow path are three-dimensionally intersected in the first embodiment.

[0080] Fig.11 It is a plan view showing a structural example of a heat exchange plate according to the second embodiment.

[0081] Fig.12 This is a diagram for explaining a case where the circulation direction of the coolant is switched in the heat exchange plate according to the second embodiment.

[0082] Fig.13 It is a plan view showing a structural example of a heat exchange plate according to Embodiment 3. DETAILED DESCRIPTION

[0083] Hereinafter, the embodiments of the present invention will be described in detail with reference to the accompanying drawings as appropriate. However, sometimes a detailed description beyond the necessary level will be omitted. For example, sometimes a detailed description of a well-known matter and a repeated description of a substantially identical structure will be omitted. The reason is to avoid the following description being redundant to an unnecessary degree so that it is easy for those skilled in the art to understand. In addition, the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present invention, and are not intended to be used to limit the subject matter described in the claims.

[0084] (Implementation Method 1)

[0085] <Vehicle structure>

[0086] Figure 1 It is a plan view showing a configuration example of the vehicle 1 according to the first embodiment. Figure 2 It is a left side view showing a configuration example of the vehicle 1 according to the first embodiment.

[0087] In addition, for the convenience of explanation, Figure 1 and Figure 2 As shown, the axis extending in the height direction of the vehicle 1 is set as the Z axis. The axis perpendicular to the Z axis (that is, parallel to the ground) and extending in the direction of travel of the vehicle 1 is set as the Y axis. The axis perpendicular to the Y axis and the Z axis (that is, the axis in the width direction of the vehicle 1) is set as the X axis. In addition, for the convenience of explanation, the positive direction of the Z axis is sometimes referred to as "up", the negative direction of the Z axis is referred to as "down", the positive direction of the Y axis is referred to as "front", the negative direction of the Y axis is referred to as "back", the positive direction of the X axis is referred to as "right", and the negative direction of the X axis is referred to as "left". These expressions are the same for other drawings recording the XYZ axis. In addition, these expressions related to directions are used for the convenience of explanation and are not intended to limit the posture of the structure during actual use.

[0088] like Figure 1 or Figure 2 As shown, the vehicle 1 includes a vehicle body 2 , wheels 3 , a motor 4 , and a battery pack 10 .

[0089] The battery pack 10 is housed in the vehicle body 2. The battery pack 10 includes one or more rechargeable and dischargeable secondary batteries 30 (see Figure 4 As an example of the secondary battery 30, a lithium-ion battery can be cited. The secondary battery 30 described below can be either one or multiple. The secondary battery 30 supplies (discharges) the stored power to the motor 4 and the like. The secondary battery 30 can also store (charge) the power generated by the motor 4 in the form of regenerative energy. Figure 1 As shown, the battery pack 10 may be housed under the floor at the center of the vehicle body 2. The details of the battery pack 10 will be discussed later.

[0090] The wheel 3 is combined with the vehicle body 2. Figure 1 and Figure 2 , a vehicle 1 is shown as a car having four wheels 3, but the vehicle 1 only needs to have at least one wheel 3. For example, the vehicle 1 may be a single vehicle having two wheels 3, or a vehicle having three or five or more wheels 3. In addition, one of the multiple wheels 3 of the vehicle 1 may be referred to as the first wheel 3a, and one of the multiple wheels 3 that is different from 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 (e.g., the front and rear direction) using the first wheel 3a and the second wheel 3b.

[0091] The motor 4 drives at least one wheel 3 (e.g., the first wheel 3a) using the power supplied from the secondary battery 30. The vehicle 1 has at least one motor 4. The vehicle 1 may be a structure in which the motor 4 drives the front wheel (i.e., front-wheel drive). Alternatively, the vehicle 1 may be a structure in which the motor 4 drives the rear wheel (i.e., rear-wheel drive), or the motor 4 may be a structure that drives both the front and rear wheels (i.e., four-wheel drive). Alternatively, the vehicle 1 may be a structure in which a plurality of motors 4 are provided, and the plurality of motors 4 drive the wheels 3 independently of each other. The motor 4 may be disposed in a motor room (engine room) located in the front of the vehicle 1.

[0092] <Circuit Structure>

[0093] Figure 3 This is a diagram for explaining an example of a circuit included in the vehicle 1 according to the first embodiment.

[0094] The battery pack 10 including the secondary battery 30 has a high voltage connector and a low voltage connector. In the present invention, the high voltage connector and the low voltage connector are not distinguished but are referred to as electrical connectors.

[0095] A high voltage distributor can be connected to the high voltage connector. A drive converter, electric compressor, HVAC (Heating, Ventilation, and Air Conditioning), on-board charger, and fast charging port can be connected to the high voltage distributor. A CAN (Controller Area Network) and 12V power supply system can be connected to the low voltage connector.

[0096] The drive inverter may be connected to the motor 4. That is, the electric power output from the secondary battery 30 may be supplied to the motor 4 via the high voltage connector, the high voltage distributor, and the drive inverter.

[0097] <Battery Pack Structure>

[0098] Figure 4 It is a perspective view showing a configuration example of the battery pack 10 according to the first embodiment. Figure 5 yes Figure 4 The battery pack 10 is shown in an AA cross-sectional view.

[0099] The battery pack 10 includes a housing 20 , a secondary battery 30 , and a heat exchange plate 100 . The housing 20 accommodates the secondary battery 30 and the heat exchange plate 100 .

[0100] The heat exchange plate 100 is, for example, in a flat, substantially rectangular shape. The heat exchange plate 100 may be referred to as a heat exchanger. Figure 5 As shown, the heat exchange plate 100 includes a first surface 101 arranged along a predetermined surface and a second surface 102 arranged along a predetermined surface. The predetermined surface may be a floor surface of the vehicle body 2. The components of the first surface 101 and the second surface 102 may be made of metal, for example, aluminum. However, the first surface 101 and the second surface 102 are not limited to being made of metal, and may also be made of other materials.

[0101] The secondary battery 30 is disposed at a position opposite to the second surface 102 with respect to the first surface 101. That is, the second surface 102, the first surface 101, and the secondary battery 30 are disposed in order from near to far from the floor surface of the vehicle body 2.

[0102] The heat exchange plate 100 has a coolant layer 200 for circulating the coolant and a refrigerant layer 300 for circulating the refrigerant between the first surface 101 and the second surface 102. The heat exchange plate 100 exchanges heat at least between the coolant moving in the coolant layer 200 and the secondary battery 30 by means of the first surface 101. In addition, the heat exchange plate 100 exchanges heat at least between the coolant moving in the coolant layer 200 and the refrigerant moving in the refrigerant layer 300. As an example of the coolant, an antifreeze containing ethylene glycol can be cited. As an example of the refrigerant, HFC (Hydrofluorocarbon) can be cited.

[0103] In this embodiment, the heat exchange plate 100 is a structure in which the cooling liquid layer 200 is arranged on the refrigerant layer 300. However, the heat exchange plate 100 may also be a structure in which the refrigerant layer 300 is arranged on the cooling liquid layer 200. The cooling liquid layer 200 may be renamed as a cooling liquid plate. The refrigerant layer 300 may be renamed as a refrigerant plate. In addition, the details of the structure of the heat exchange plate 100 and the details of the structures of the cooling liquid layer 200 and the refrigerant layer 300 will be discussed later.

[0104] In addition, in the present embodiment, the end of the heat exchange plate 100 in a predetermined direction (for example, the positive direction of the Y axis) is referred to as the first end 71, and the end in the direction opposite to the first end 71 (for example, the negative direction of the Y axis) is referred to as the second end 72. The first end 71 may be located on the side of the traveling direction of the vehicle 1, and the second end 72 may be located on the side opposite to the traveling direction of the vehicle 1.

[0105] like Figure 4 As shown, a refrigerant input portion 301 , a refrigerant output portion 302 , a first coolant input and output portion 201 , and a second coolant input and output portion 202 are disposed at the first end portion 71 of the heat exchange plate 100 .

[0106] The refrigerant input portion 301 is a portion for the refrigerant to enter the refrigerant layer 300 from the outside of the heat exchange plate 100 , and the refrigerant output portion 302 is a portion for the refrigerant to exit from the refrigerant layer 300 to the outside of the heat exchange plate 100 .

[0107] The first coolant input / output portion 201 is a portion for coolant to enter the coolant layer 200 from the outside of the heat exchange plate 100, and the second coolant input / output portion 202 is a portion for coolant to exit from the coolant layer 200 to the outside of the heat exchange plate 100. Alternatively, the second coolant input / output portion 202 is a portion for coolant to enter the coolant layer 200 from the outside of the heat exchange plate 100, and the first coolant input / output portion 201 is a portion for coolant to exit from the coolant layer 200 to the outside of the heat exchange plate 100.

[0108] <Structure of heat exchange plate>

[0109] Figure 6 It is a plan view showing a structural example of the refrigerant layer 300 according to the first embodiment. Figure 7 It is a plan view showing a structural example of the cooling liquid layer 200 according to the first embodiment. Figure 8 This is a plan view showing an example of the positional relationship between the refrigerant layer 300 and the cooling liquid layer 200 according to the first embodiment.

[0110] First, refer to Figure 6 The structure of the refrigerant layer 300 will be described.

[0111] The refrigerant layer 300 includes a refrigerant input portion 301 , a refrigerant output portion 302 , a first refrigerant flow path 311 , a second refrigerant flow path 312 , a third refrigerant flow path 313 , a first connected refrigerant flow path 321 , and a second connected refrigerant flow path 322 .

[0112] As described above, the refrigerant input portion 301 is disposed at the first end portion 71 of the heat exchange plate 100 and is a portion through which the refrigerant enters the refrigerant layer 300 of the heat exchange plate 100 .

[0113] As described above, the refrigerant output portion 302 is disposed at the first end portion 71 of the heat exchange plate 100 and is a portion through which the refrigerant is discharged from the refrigerant layer 300 of the heat exchange plate 100 .

[0114] In addition, the vehicle 1 is provided with a refrigerant circuit 600, which is connected to the refrigerant input part 301 and the refrigerant output part 302, and has at least a compressor 601 and a condenser 602, through which the refrigerant flows. Thus, the refrigerant discharged from the refrigerant output part 302 is cooled via the compressor 601 and the condenser 602, and the cooled refrigerant enters the refrigerant input part 301, and can exchange heat with the coolant.

[0115] The first refrigerant flow path 311 is connected to the refrigerant output portion 302 , and is arranged along a predetermined direction (for example, the Y-axis direction) between the first surface 101 and the second surface 102 .

[0116] The second refrigerant flow path 312 is connected to the refrigerant output portion 302 , and is arranged along a predetermined direction (for example, the Y-axis direction) between the first surface 101 and the second surface 102 .

[0117] The third refrigerant flow path 313 is connected to the refrigerant input portion 301 , and is disposed between the first surface 101 and the second surface 102 , and between the first refrigerant flow path 311 and the second refrigerant flow path 312 along a predetermined direction (eg, the Y-axis direction).

[0118] The first connected refrigerant flow path 321 connects the third refrigerant flow path 313 and the first refrigerant flow path 311 between the first surface 101 and the second surface 102 .

[0119] The second connecting refrigerant flow path 322 connects the third refrigerant flow path 313 and the second refrigerant flow path 312 between the first surface 101 and the second surface 102 .

[0120] According to this structure, the refrigerant entering the refrigerant layer 300 of the heat exchanger plate 100 from the refrigerant input part 301 can move to the refrigerant output part 302 via the third refrigerant flow path 313, the first connected refrigerant flow path 321 and the first refrigerant flow path 311, and the refrigerant entering the heat exchanger plate 100 from the refrigerant input part 301 can move to the refrigerant output part 302 via the third refrigerant flow path 313, the second connected refrigerant flow path 322 and the second refrigerant flow path 312.

[0121] The refrigerant layer 300 may further include at least one first branch refrigerant flow path 331 and at least one second branch refrigerant flow path 332. Each first branch refrigerant flow path 331 connects the third refrigerant flow path 313 and the first refrigerant flow path 311. Each second branch refrigerant flow path 332 connects the third refrigerant flow path 313 and the second refrigerant flow path 312.

[0122] According to this structure, the refrigerant entering the heat exchanger plate 100 from the refrigerant input part 301 can move from the third refrigerant flow path 313 to the refrigerant output part 302 via the first branch refrigerant flow paths 331 and the first refrigerant flow path 311, and the refrigerant entering the heat exchanger plate 100 from the refrigerant input part 301 can move to the refrigerant output part 302 via the second branch refrigerant flow paths 332 and the second refrigerant flow path 312.

[0123] The refrigerant exchanges heat with the cooling liquid while moving in the refrigerant flow path, and therefore the temperature of the refrigerant tends to increase as it moves away from the refrigerant input portion 301 .

[0124] Therefore, there is a tendency that the temperature of the refrigerant flowing in the third refrigerant flow path 313 and the refrigerant flowing in the vicinity of the third refrigerant flow path 313 in each first branch refrigerant flow path 331 is lower than the temperature of the refrigerant flowing in the first refrigerant flow path 311 and the refrigerant flowing in the vicinity of the first refrigerant flow path 311 in each first branch refrigerant flow path 331. Therefore, in the present embodiment, the refrigerant flowing in the third refrigerant flow path 313 and the refrigerant flowing in the vicinity of the third refrigerant flow path 313 in each first branch refrigerant flow path 331 are referred to as the first low-temperature refrigerant 501 (for example, Figure 6 The refrigerant flowing in the first refrigerant flow path 311 and the refrigerant flowing in the vicinity of the first refrigerant flow path 311 in each first branch refrigerant flow path 331 are referred to as the first high-temperature refrigerant 511 (for example, Figure 6 the darker hatched portion of the image).

[0125] Similarly, there is a tendency that the temperature of the refrigerant flowing in the third refrigerant flow path 313 and the refrigerant flowing in the vicinity of the third refrigerant flow path 313 in each second branch refrigerant flow path 332 is lower than the temperature of the refrigerant flowing in the second refrigerant flow path 312 and the refrigerant flowing in the vicinity of the second refrigerant flow path 312 in each second branch refrigerant flow path. Therefore, in the present embodiment, the refrigerant flowing in the third refrigerant flow path 313 and the refrigerant flowing in the vicinity of the third refrigerant flow path 313 in each second branch refrigerant flow path 332 are referred to as the second low-temperature refrigerant 502 (for example, Figure 6The refrigerant flowing in the second refrigerant flow path 312 and the refrigerant flowing in the vicinity of the second refrigerant flow path 312 in each second branch refrigerant flow path 332 are referred to as the second high-temperature refrigerant 512 (for example, Figure 6 the darker hatched portion of the image).

[0126] However, the expressions "low temperature" and "high temperature" related to the refrigerant are used to express the difference in relative temperature between the refrigerants, and do not have any meaning of comparison with the temperature of the coolant or the like.

[0127] Next, refer to Figure 7 and Figure 8 The structure of the cooling liquid layer 200 will be described.

[0128] The coolant layer 200 includes a first coolant input / output portion 201 , a second coolant input / output portion 202 , a first coolant flow path 211 , a second coolant flow path 212 , a first connecting coolant flow path 221 , and a second connecting coolant flow path 222 .

[0129] The first coolant input and output portion 201 is disposed at the first end portion 71 , and is used to input and output the coolant to and from the heat exchange plate 100 .

[0130] The second coolant input and output portion 202 is disposed at the first end portion 71 , and is used to input and output the coolant to and from the heat exchange plate 100 .

[0131] Furthermore, the vehicle 1 includes a coolant circuit 700 that is connected to the first coolant input / output portion 201 and the second coolant input / output portion 202 and through which the coolant circulates.

[0132] The first coolant flow path 211 is connected to the first coolant input / output portion 201 , and is arranged along a predetermined direction (eg, the Y-axis direction) between the first surface 101 and the second surface 102 .

[0133] The second coolant flow path 212 is connected to the second coolant input / output portion 202 , and is disposed along a predetermined direction (eg, the Y-axis direction) between the first surface 101 and the second surface 102 .

[0134] The first cooling liquid flow path 211 may overlap at least a portion of the second refrigerant flow path 312, at least a portion of the second branch refrigerant flow path 332, and at least a portion of the third refrigerant flow path 313 when viewed from above. Therefore, the cooling liquid flowing in the first cooling liquid flow path 211 mainly exchanges heat with the second low-temperature refrigerant 502 and the second high-temperature refrigerant 512 flowing in the refrigerant layer 300.

[0135] The second coolant flow path 212 may overlap at least a portion of the first refrigerant flow path 311, at least a portion of the first branch refrigerant flow path 331, and at least a portion of the third refrigerant flow path 313 when viewed from above. Therefore, the coolant flowing in the second coolant flow path 212 mainly exchanges heat with the first low-temperature refrigerant 501 and the first high-temperature refrigerant 511 flowing in the refrigerant layer 300.

[0136] The first connecting coolant flow path 221 connects, at the second end portion 72, a portion of the first coolant flow path 211 that is closer to the second refrigerant flow path 312 than to the third refrigerant flow path 313 and a portion of the second coolant flow path 212 that is closer to the third refrigerant flow path 313 than to the second refrigerant flow path 312. The first connecting coolant flow path may be formed, for example, by a hose.

[0137] The second connecting coolant flow path 222 connects the portion of the first coolant flow path 211 that is closer to the third refrigerant flow path 313 than to the second refrigerant flow path 312 and the portion of the second coolant flow path 212 that is closer to the first refrigerant flow path 311 than to the third refrigerant flow path 313 at the second end portion 72. The second connecting coolant flow path may be formed of, for example, a hose.

[0138] The coolant entering the heat exchange plate 100 from the first coolant input and output part 201 can move from the first coolant flow path 211 to the second coolant input and output part 202 via the first connecting coolant flow path 221 and the second coolant flow path 212, and the coolant entering the heat exchange plate 100 from the first coolant input and output part 201 can move from the first coolant flow path 211 to the second connecting coolant flow path 222 and the second coolant flow path 212 to the second coolant input and output part 202.

[0139] Thus, the coolant flowing in the first coolant flow path 211 and mainly exchanging heat with the second high-temperature refrigerant 512 mainly exchanges heat with the first low-temperature refrigerant 501 in the second coolant flow path 212 via the first connecting coolant flow path 221. In addition, the coolant flowing in the first coolant flow path 211 and mainly exchanging heat with the second low-temperature refrigerant 502 mainly exchanges heat with the first high-temperature refrigerant 511 in the second coolant flow path 212 via the second connecting coolant flow path 222. Therefore, the coolant flowing in the first coolant flow path 211 and the second coolant flow path 212 exchanges heat with the first low-temperature refrigerant 501, the first high-temperature refrigerant 511, the second low-temperature refrigerant 502, and the second high-temperature refrigerant 512 as a whole, so that the coolant layer 200 can realize a coolant with less temperature unevenness as a whole. Therefore, the coolant layer 200 can cool the secondary battery 30 more uniformly.

[0140] The first cooling liquid flow path 211 may include a first branch flow path 231 and a second branch flow path 232 between the first surface 101 and the second surface 102 .

[0141] The first branch flow path 231 is arranged to be closer to the second refrigerant flow path 312 than to the third refrigerant flow path 313, and is connected to the first connection coolant flow path 221. The first branch flow path 231 may overlap at least a portion of the second refrigerant flow path 312 and at least a portion of the second branch refrigerant flow path 332 close to the second refrigerant flow path 312 when viewed from above. Therefore, the coolant flowing in the first branch flow path 231 mainly exchanges heat with the second high-temperature refrigerant 512 in the refrigerant layer 300.

[0142] The second branch flow path 232 is arranged to be closer to the third refrigerant flow path 313 than to the second refrigerant flow path 312, and is connected to the second connection cooling liquid flow path 222. The second branch flow path 232 may overlap at least a portion of the third refrigerant flow path 313 and at least a portion of the second branch refrigerant flow path 332 close to the third refrigerant flow path 313 when viewed from above. Therefore, the cooling liquid flowing in the second branch flow path 232 mainly exchanges heat with the second low-temperature refrigerant 502 in the refrigerant layer 300.

[0143] The second cooling liquid flow path 212 may include a third branch flow path 233 and a fourth branch flow path 234 between the first surface 101 and the second surface 102 .

[0144] The third branch flow path 233 is arranged to be closer to the third refrigerant flow path 313 than to the first refrigerant flow path 311, and is connected to the first connection cooling flow path. The third branch flow path 233 may overlap at least a portion of the third refrigerant flow path 313 and at least a portion of the first branch refrigerant flow path 331 close to the third refrigerant flow path 313 when viewed from above. Therefore, the cooling liquid flowing in the third branch flow path 233 mainly exchanges heat with the first low-temperature refrigerant 501 in the refrigerant layer 300.

[0145] The fourth branch flow path 234 is arranged to be closer to the first refrigerant flow path 311 than to the third refrigerant flow path 313, and is connected to the second connection cooling flow path. The fourth branch flow path 234 may overlap at least a portion of the first refrigerant flow path 311 and at least a portion of the first branch refrigerant flow path 331 close to the third refrigerant flow path 313 when viewed from above. Therefore, the coolant flowing in the fourth branch flow path 234 mainly exchanges heat with the first high-temperature refrigerant 511 in the refrigerant layer 300.

[0146] According to this structure, the coolant entering the coolant layer 200 of the heat exchange plate 100 from the first coolant input and output part 201 can move from the first branch path 231 to the second coolant input and output part 202 via the first connecting coolant flow path 221 and the third branch path 233, and the coolant entering the coolant layer 200 of the heat exchange plate 100 from the first coolant input and output part 201 can move from the second branch path 232 to the second connecting coolant flow path 222 and the fourth branch path 234 to the second coolant input and output part 202.

[0147] Thus, the coolant flowing in the first branch flow path 231, which mainly exchanges heat with the second high-temperature refrigerant 512, mainly exchanges heat with the first low-temperature refrigerant 501 in the third branch flow path 233 via the first connecting coolant flow path 221. In addition, the coolant flowing in the second branch flow path 232, which mainly exchanges heat with the second low-temperature refrigerant 502, mainly exchanges heat with the first high-temperature refrigerant 511 in the fourth branch flow path 234 via the second connecting coolant flow path 222. Therefore, the coolant flowing in the first branch flow path 231, the second branch flow path 232, the third branch flow path 233, and the fourth branch flow path 234 exchanges heat with the second high-temperature refrigerant 512, the second low-temperature refrigerant 502, the first low-temperature refrigerant 501, and the first high-temperature refrigerant 511 as a whole, so that the coolant layer 200 can realize a coolant with less temperature unevenness as a whole. Thus, the cooling liquid layer 200 can cool the secondary battery 30 more uniformly.

[0148] It is possible that, between the first surface 101 and the second surface 102, at least the first cooling liquid flow path 211 and the second cooling liquid flow path 212 are arranged at a position closer to the first surface 101 than the first refrigerant flow path 311, the second refrigerant flow path 312, and the third refrigerant flow path 313. According to this structure, the refrigerant moving in the refrigerant layer 300 can exchange heat with the coolant moving in the cooling liquid layer 200, and the coolant moving in the cooling liquid layer 200 can exchange heat with the secondary battery 30 via the first surface 101.

[0149] Alternatively, between the first surface 101 and the second surface 102, at least the first refrigerant flow path 311, the second refrigerant flow path 312, and the third refrigerant flow path 313 are arranged at a position closer to the first surface 101 than the first cooling liquid flow path 211 and the second cooling liquid flow path 212. According to this structure, the cooling liquid moving in the cooling liquid layer 200 can exchange heat with the refrigerant moving in the refrigerant layer 300, and the refrigerant moving in the refrigerant layer 300 can exchange heat with the secondary battery 30 via the first surface 101.

[0150] The heat exchange plate 100 may be composed of a first heat exchange plate 100A and a second heat exchange plate 100B, the first coolant flow path 211 may be formed in the first heat exchange plate 100A, and the second coolant flow path 212 may be formed in the second heat exchange plate 100B. Furthermore, the first heat exchange plate 100A and the second heat exchange plate 100B may be connected by a first connecting coolant flow path 221 and a second connecting coolant flow path 222. According to this structure, a relatively large heat exchange plate 100 may be realized by using the first heat exchange plate 100A and the second heat exchange plate 100B. In addition, compared with manufacturing a single large heat exchange plate 100, the method of manufacturing a larger heat exchange plate 100 by combining the first heat exchange plate 100A and the second heat exchange plate 100B has greater advantages in terms of manufacturing space and handling.

[0151] <Modification>

[0152] Fig. 9 This is a perspective view showing a structural example in which the first coupling coolant flow path 221 and the second coupling coolant flow path 222 are provided to three-dimensionally intersect each other in the first embodiment. Fig.10 This is a plan view showing a structural example in which the first coupling coolant flow path 221 and the second coupling coolant flow path 222 are provided to three-dimensionally intersect each other in the first embodiment.

[0153] like Fig. 9 and Fig.10 As shown, the first connecting coolant flow path 221 and the second connecting coolant flow path 222 may be a three-dimensionally intersecting structure. Fig. 9 and Fig.10 As shown, the second connecting coolant flow path 222 may be a structure that passes below the first connecting coolant flow path 221. In this case, the first connecting coolant flow path 221 and the second connecting coolant flow path 222 may not be implemented by a hose, but may be a structure that passes below the first connecting coolant flow path 221. Fig. 9 and Fig.10 This is achieved by providing a flow path formed by a partition wall in the coolant layer 200 .

[0154] According to this structure, it is also possible to achieve Figure 6 , Figure 7 , Figure 8 The effects of the heat exchange plate 100 described above are the same as those of the heat exchange plate 100 described above.

[0155] <Appendix to Implementation Method 1>

[0156] The following technology is disclosed by the description of the above-mentioned Embodiment 1.

[0157] <Technique A1> A vehicle comprising:

[0158] Car body;

[0159] A first wheel and a second wheel, which are combined with the vehicle body;

[0160] a secondary battery arranged along a predetermined surface in the vehicle body;

[0161] a heat exchange plate disposed along the predetermined surface in the vehicle body; and

[0162] a motor that drives at least the first wheel using electric power supplied from the secondary battery,

[0163] The vehicle is capable of moving in a predetermined direction using the first wheel and the second wheel.

[0164] In the vehicle,

[0165] The heat exchange plate has:

[0166] a first surface, which is arranged along the predetermined surface and is capable of exchanging heat with the secondary battery;

[0167] a second surface arranged along the predetermined surface and located on the opposite side of the first surface;

[0168] a first end portion, which is an end portion in the predetermined direction;

[0169] a second end portion located on the opposite side of the first end portion in the predetermined direction;

[0170] A refrigerant input portion, which is disposed at the first end portion and allows the refrigerant to enter the heat exchange plate;

[0171] A refrigerant output portion, which is disposed at the first end portion and allows the refrigerant to exit from the heat exchange plate;

[0172] a first refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction;

[0173] a second refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction;

[0174] a third refrigerant flow path connected to the refrigerant input portion and arranged between the first surface and the second surface along the predetermined direction between the first refrigerant flow path and the second refrigerant flow path;

[0175] a first connecting refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface; and

[0176] a second connecting refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface,

[0177] The refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the first connected refrigerant flow path and the first refrigerant flow path, and the refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the second connected refrigerant flow path and the second refrigerant flow path,

[0178] The heat exchange plate also has:

[0179] A first cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting cooling liquid relative to the heat exchange plate;

[0180] a second cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting the cooling liquid relative to the heat exchange plate;

[0181] a first cooling liquid flow path connected to the first cooling liquid input / output portion and arranged between the first surface and the second surface along the predetermined direction;

[0182] a second cooling liquid flow path connected to the second cooling liquid input and output portion and arranged between the first surface and the second surface along the predetermined direction;

[0183] a first connecting coolant flow path that connects, at the second end, a portion of the first coolant flow path that is closer to the second refrigerant flow path than to the third refrigerant flow path and a portion of the second coolant flow path that is closer to the third refrigerant flow path than to the second refrigerant flow path; and

[0184] a second connecting coolant flow path, which connects at the second end a portion of the first coolant flow path whose distance from the third refrigerant flow path is smaller than that from the second refrigerant flow path and a portion of the second coolant flow path whose distance from the first refrigerant flow path is smaller than that from the third refrigerant flow path,

[0185] The coolant entering the heat exchange plate from the first coolant input and output part can move from the first coolant flow path to the second coolant input and output part via the first connecting coolant flow path and the second coolant flow path, and the coolant entering the heat exchange plate from the first coolant input and output part can move from the first coolant flow path to the second coolant input and output part via the second connecting coolant flow path and the second coolant flow path.

[0186] <Technique A2> A vehicle according to Technique A1, wherein:

[0187] The first cooling liquid flow path includes between the first surface and the second surface:

[0188] a first branch flow path, which is arranged so that the distance from the second refrigerant flow path is smaller than the distance from the third refrigerant flow path, and is connected to the first connection coolant flow path; and

[0189] a second branch flow path, which is arranged to be closer to the third refrigerant flow path than to the second refrigerant flow path, and is connected to the second connecting coolant flow path;

[0190] The second coolant flow path includes between the first surface and the second surface:

[0191] a third branch flow path, which is arranged at a distance from the third refrigerant flow path that is smaller than a distance from the first refrigerant flow path and is connected to the first connection coolant flow path; and

[0192] The fourth branch flow path is arranged so that the distance from the first refrigerant flow path is smaller than the distance from the third refrigerant flow path, and is connected to the second connection coolant flow path.

[0193] <Technique A3> A vehicle according to Technique A1 or A2, wherein:

[0194] The heat exchange plate also has:

[0195] at least one first branch refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path; and

[0196] At least one second branch refrigerant flow path connects the third refrigerant flow path and the second refrigerant flow path.

[0197] <Technique A4> A vehicle according to any one of Techniques A1 to A3, wherein:

[0198] Between the first surface and the second surface,

[0199] At least the first coolant flow path and the second coolant flow path are arranged closer to the first surface than the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path.

[0200] <Technique A5> A vehicle according to any one of Techniques A1 to A4, wherein:

[0201] Between the first surface and the second surface,

[0202] At least the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path are arranged closer to the first surface than the first coolant flow path and the second coolant flow path.

[0203] <Technique A6> A vehicle according to any one of Techniques A1 to A5, wherein:

[0204] The first connection coolant flow path and the second connection coolant flow path are respectively formed of hoses.

[0205] <Technique A7> A vehicle according to Technique A6, wherein:

[0206] The heat exchange plate is composed of a first heat exchange plate and a second heat exchange plate.

[0207] The first coolant flow path is formed in the first heat exchange plate.

[0208] The second coolant flow path is formed in the second heat exchange plate.

[0209] <Technique A8> A vehicle according to any one of Techniques A1 to A5, wherein:

[0210] The first connection coolant flow path and the second connection coolant flow path are three-dimensionally intersecting structures.

[0211] <Technique A9> A vehicle according to any one of Techniques A1 to A8, wherein:

[0212] The vehicle includes a coolant circuit connected to the first coolant input / output portion and the second coolant input / output portion and configured to circulate the coolant.

[0213] <Technique A10> A vehicle according to any one of Techniques A1 to A9, wherein:

[0214] The vehicle includes a refrigerant circuit connected to the refrigerant input unit and the refrigerant output unit, including at least a compressor and a condenser, and through which the refrigerant flows.

[0215] <Technology A11>

[0216] A heat exchange plate is a heat exchange plate that can be installed in a vehicle, and the vehicle includes:

[0217] Car body;

[0218] A first wheel and a second wheel, which are combined with the vehicle body;

[0219] a secondary battery arranged along a predetermined surface in the vehicle body; and

[0220] a motor that drives at least the first wheel using electric power supplied from the secondary battery,

[0221] The vehicle is capable of moving in a predetermined direction using the first wheel and the second wheel.

[0222] The heat exchange plate includes:

[0223] a first surface, which is arranged along the predetermined surface and is capable of exchanging heat with the secondary battery;

[0224] a second surface arranged along the predetermined surface and located on the opposite side of the first surface;

[0225] a first end portion, which is an end portion in the predetermined direction;

[0226] a second end portion located on the opposite side of the first end portion in the predetermined direction;

[0227] A refrigerant input portion, which is disposed at the first end portion and allows the refrigerant to enter the heat exchange plate;

[0228] A refrigerant output portion, which is disposed at the first end portion and allows the refrigerant to exit from the heat exchange plate;

[0229] a first refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction;

[0230] a second refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction;

[0231] a third refrigerant flow path connected to the refrigerant input portion and arranged between the first surface and the second surface along the predetermined direction between the first refrigerant flow path and the second refrigerant flow path;

[0232] a first connecting refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface; and

[0233] a second connecting refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface,

[0234] The refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the first connected refrigerant flow path and the first refrigerant flow path, and the refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the second connected refrigerant flow path and the second refrigerant flow path,

[0235] The heat exchange plate also has:

[0236] A first cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting cooling liquid relative to the heat exchange plate;

[0237] a second cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting the cooling liquid relative to the heat exchange plate;

[0238] a first cooling liquid flow path connected to the first cooling liquid input / output portion and arranged between the first surface and the second surface along the predetermined direction;

[0239] a second cooling liquid flow path connected to the second cooling liquid input and output portion and arranged between the first surface and the second surface along the predetermined direction;

[0240] a first connecting coolant flow path that connects, at the second end, a portion of the first coolant flow path that is closer to the second refrigerant flow path than to the third refrigerant flow path and a portion of the second coolant flow path that is closer to the third refrigerant flow path than to the second refrigerant flow path; and

[0241] a second connecting coolant flow path, which connects at the second end a portion of the first coolant flow path whose distance from the third refrigerant flow path is smaller than that from the second refrigerant flow path and a portion of the second coolant flow path whose distance from the first refrigerant flow path is smaller than that from the third refrigerant flow path,

[0242] The coolant entering the heat exchange plate from the first coolant input and output part can move from the first coolant flow path to the second coolant input and output part via the first connecting coolant flow path and the second coolant flow path, and the coolant entering the heat exchange plate from the first coolant input and output part can move from the first coolant flow path to the second coolant input and output part via the second connecting coolant flow path and the second coolant flow path.

[0243] <Technique A12> The heat exchange plate according to Technique A11, wherein:

[0244] The first cooling liquid flow path includes between the first surface and the second surface:

[0245] a first branch flow path, which is arranged so that the distance from the second refrigerant flow path is smaller than the distance from the third refrigerant flow path, and is connected to the first connection coolant flow path; and

[0246] a second branch flow path, which is arranged to be closer to the third refrigerant flow path than to the second refrigerant flow path, and is connected to the second connecting coolant flow path;

[0247] The second coolant flow path includes between the first surface and the second surface:

[0248] a third branch flow path, which is arranged at a distance from the third refrigerant flow path that is smaller than a distance from the first refrigerant flow path and is connected to the first connection coolant flow path; and

[0249] The fourth branch flow path is arranged so that the distance from the first refrigerant flow path is smaller than the distance from the third refrigerant flow path, and is connected to the second connection coolant flow path.

[0250] <Technique A13> The heat exchange plate according to Technique A11 or A12, wherein:

[0251] The heat exchange plate also has:

[0252] at least one first branch refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path; and

[0253] At least one second branch refrigerant flow path connects the third refrigerant flow path and the second refrigerant flow path.

[0254] <Technique A14> The heat exchange plate according to any one of Techniques A11 to A13, wherein:

[0255] Between the first surface and the second surface,

[0256] At least the first coolant flow path and the second coolant flow path are arranged closer to the first surface than the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path.

[0257] <Technique A15> The heat exchange plate according to any one of Techniques A11 to A14, wherein:

[0258] Between the first surface and the second surface,

[0259] At least the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path are arranged closer to the first surface than the first coolant flow path and the second coolant flow path.

[0260] <Technique A16> The heat exchange plate according to any one of Techniques A11 to A15, wherein:

[0261] The first connection coolant flow path and the second connection coolant flow path are respectively formed of hoses.

[0262] <Technique A17> The heat exchange plate according to Technique A16, wherein:

[0263] The heat exchange plate is composed of a first heat exchange plate and a second heat exchange plate.

[0264] The first coolant flow path is formed in the first heat exchange plate.

[0265] The second coolant flow path is formed in the second heat exchange plate.

[0266] <Technique A18> The heat exchange plate according to any one of Techniques A11 to A15, wherein:

[0267] The first connection coolant flow path and the second connection coolant flow path are three-dimensionally intersecting structures.

[0268] <Technique A19> The heat exchange plate according to any one of Techniques A11 to A18, wherein:

[0269] A coolant circuit provided in the vehicle body and through which the coolant circulates can be connected to the first coolant input / output portion and the second coolant input / output portion.

[0270] <Technique A20> The heat exchange plate according to any one of Techniques A11 to A19, wherein:

[0271] A refrigerant circuit provided to the vehicle body can be connected to the refrigerant input portion and the refrigerant output portion, the refrigerant circuit having at least a compressor and a condenser through which the refrigerant flows.

[0272] (Implementation Method 2)

[0273] Fig.11 It is a plan view showing a structural example of a heat exchange plate 100 according to the second embodiment.

[0274] The refrigerant layer 300 in Embodiment 2 may have the same structure as the refrigerant layer 300 in Embodiment 1. Therefore, the description of the refrigerant layer 300 is omitted here.

[0275] In addition, the vehicle 1 may include a refrigerant circuit 600, which is connected to the refrigerant input part 301 and the refrigerant output part 302 and includes at least a compressor 601 and a condenser 602, through which the refrigerant flows. Thus, the refrigerant discharged from the refrigerant output part 302 is cooled via the compressor 601 and the condenser 602, and the cooled refrigerant enters the refrigerant input part 301 and can exchange heat with the coolant.

[0276] Furthermore, the vehicle 1 includes a coolant circuit 700 that is connected to the first coolant input / output portion 201 and the second coolant input / output portion 202 and through which the coolant circulates.

[0277] The coolant layer 200 is configured to include a first coolant input / output portion 201 , a second coolant input / output portion 202 , a first coolant flow path 401 , a second coolant flow path 402 , a third coolant flow path 403 , a fourth coolant flow path 404 , a first connecting coolant flow path 411 , and a second connecting coolant flow path 412 .

[0278] The first coolant input and output portion 201 is disposed at the first end portion 71 , and is used to input and output the coolant to and from the heat exchange plate 100 .

[0279] The second coolant input and output portion 202 is disposed at the first end portion 71 , and is used to input and output the coolant to and from the heat exchange plate 100 .

[0280] The first cooling liquid flow path 401 is connected to the first cooling liquid input / output portion 201, and is configured such that the distance from the third refrigerant flow path 313 is smaller than the distance from the second refrigerant flow path 312 along a predetermined direction (e.g., Y direction) between the first surface 101 and the second surface 102. The first cooling liquid flow path 401 may overlap with at least a portion of the third refrigerant flow path 313 and at least a portion of the second branch refrigerant flow path 332 close to the third refrigerant flow path 313 when viewed from above. Therefore, the cooling liquid flowing in the first cooling liquid flow path 401 mainly exchanges heat with the second low-temperature refrigerant 502 in the refrigerant layer 300.

[0281] The second coolant flow path 402 is connected to the second coolant input / output portion 202, and is configured such that the distance from the second refrigerant flow path 312 is smaller than the distance from the third refrigerant flow path 313 along a predetermined direction (e.g., the Y-axis direction) between the first surface 101 and the second surface 102. The second coolant flow path 402 may overlap with at least a portion of the second refrigerant flow path 312 and at least a portion of the second branch refrigerant flow path 332 close to the second refrigerant flow path 312 when viewed from above. Therefore, the coolant flowing in the second coolant flow path 402 mainly exchanges heat with the second high-temperature refrigerant 512 in the refrigerant layer 300.

[0282] The third cooling liquid flow path 403 is connected to the first cooling liquid input / output portion 201, and is configured such that the distance from the third refrigerant flow path 313 is smaller than the distance from the first refrigerant flow path 311 along a predetermined direction (e.g., the Y-axis direction) between the first surface 101 and the second surface 102. The third cooling liquid flow path 403 may overlap with at least a portion of the third refrigerant flow path 313 and at least a portion of the first branch refrigerant flow path 331 close to the third refrigerant flow path 313 when viewed from above. Therefore, the cooling liquid flowing in the third cooling liquid flow path 403 mainly exchanges heat with the first low-temperature refrigerant 501 in the refrigerant layer 300.

[0283] The fourth cooling liquid flow path 404 is connected to the second cooling liquid input / output portion 202, and is configured such that the distance from the first refrigerant flow path 311 is smaller than the distance from the third refrigerant flow path 313 along a predetermined direction (e.g., the Y-axis direction) between the first surface 101 and the second surface 102. The fourth cooling liquid flow path 404 may overlap with at least a portion of the first refrigerant flow path 311 and at least a portion of the first branch refrigerant flow path 331 close to the first refrigerant flow path 311 when viewed from above. Therefore, the cooling liquid flowing in the fourth cooling liquid flow path 404 mainly exchanges heat with the first high-temperature refrigerant 511 in the refrigerant layer 300.

[0284] The first connecting coolant flow path 411 connects the first coolant flow path 401 and the second coolant flow path 402 at the second end portion 72 .

[0285] The second connecting coolant flow path 412 connects the third coolant flow path 403 and the fourth coolant flow path 404 at the second end portion 72 .

[0286] According to this structure, the coolant entering the coolant layer 200 of the heat exchange plate 100 from the first coolant input and output part 201 can move from the first coolant flow path 401 to the second coolant input and output part 202 via the first connected coolant flow path 411 and the second connected coolant flow path 412, and the coolant entering the coolant layer 200 of the heat exchange plate 100 from the first coolant input and output part 201 can move from the third coolant flow path 403 to the second connected coolant flow path 412 and the fourth coolant flow path 404 to the second coolant input and output part 202.

[0287] Thus, the coolant flowing in the first coolant flow path 401, which mainly exchanges heat with the second low-temperature refrigerant 502, mainly exchanges heat with the second high-temperature refrigerant 512 in the second coolant flow path 402 via the first connecting coolant flow path 411. In addition, the coolant flowing in the third coolant flow path 403, which mainly exchanges heat with the first low-temperature refrigerant 501, mainly exchanges heat with the first high-temperature refrigerant 511 in the fourth coolant flow path 4040 via the second connecting coolant flow path 412. Therefore, the coolant flowing in the first coolant flow path 401, the second coolant flow path 402, the third coolant flow path 403, and the fourth coolant flow path 404 exchanges heat with the second low-temperature refrigerant 502, the second high-temperature refrigerant 512, the first low-temperature refrigerant 501, and the first high-temperature refrigerant 511 as a whole, so that the coolant layer 200 can realize a coolant with less temperature unevenness as a whole. Thus, the cooling liquid layer 200 can cool the secondary battery 30 more uniformly.

[0288] It is possible that, between the first surface 101 and the second surface 102, at least the first coolant flow path 401, the second coolant flow path 402, the third coolant flow path 403, and the fourth coolant flow path 404 are arranged at a position closer to the first surface 101 than the first refrigerant flow path 311, the second refrigerant flow path 312, and the third refrigerant flow path 313. According to this structure, the refrigerant moving in the refrigerant layer 300 can exchange heat with the coolant moving in the coolant layer 200, and the coolant moving in the coolant layer 200 can exchange heat with the secondary battery 30 via the first surface 101.

[0289] Alternatively, between the first surface 101 and the second surface 102, at least the first refrigerant flow path 311, the second refrigerant flow path 312, and the third refrigerant flow path 313 are arranged at a position closer to the first surface 101 than the first coolant flow path 401, the second coolant flow path 402, the third coolant flow path 403, and the fourth coolant flow path 404. According to this structure, the coolant moving in the coolant layer 200 can exchange heat with the refrigerant moving in the refrigerant layer 300, and the refrigerant moving in the refrigerant layer 300 can exchange heat with the secondary battery 30 via the first surface 101.

[0290] Next, the case of switching the circulation direction of the coolant will be described.

[0291] Fig.12 1 is a diagram for explaining a case where the circulation direction of the coolant is switched in the heat exchange plate 100 according to the second embodiment. Fig.11 In comparison, Fig.12 The circulation direction of the coolant is different.

[0292] When the temperature of the coolant flowing through the coolant circuit 700 is lower than the temperature of the outside air, the coolant is heated by the outside air while flowing through the coolant circuit 700. Therefore, in the second embodiment, when the temperature of the coolant flowing through the coolant circuit 700 is lower than the temperature of the outside air, Fig.11 As shown, the coolant is input to the first coolant input / output portion 201 and output from the second coolant input / output portion 202. Thus, the coolant moving in the first coolant flow path 401 and the third coolant flow path 403 is heated by the outside air, but is sufficiently cooled by the first low-temperature refrigerant 501 and the second low-temperature refrigerant 502, so that the secondary battery 30 can be cooled. In addition, the coolant moving in the second coolant flow path 212 and the fourth coolant flow path is sufficiently cooled by the second low-temperature refrigerant 502 and the second low-temperature refrigerant 502 respectively during the period of moving in the first coolant flow path 211 and the third coolant flow path of the previous stage, so that the secondary battery 30 can be cooled. That is, the coolant layer 200 can cool the secondary battery 30 uniformly.

[0293] On the other hand, when the temperature of the coolant flowing through the coolant circuit 700 is higher than the temperature of the outside air, the coolant is cooled by the outside air while flowing through the coolant circuit 700. Therefore, in the second embodiment, when the temperature of the coolant flowing through the coolant circuit 700 is higher than the temperature of the outside air, Fig.12 As shown, the coolant is input to the second coolant input / output portion 202 and output from the first coolant input / output portion 201. Thus, the coolant entering the second coolant flow path 402 and the fourth coolant flow path 404 from the second coolant input / output portion 202 is cooled by the outside air, so the secondary battery 30 can be cooled while moving in the second coolant flow path 402 and the fourth coolant flow path 404. In addition, the coolant moving in the first coolant flow path 401 and the third coolant flow path 403 is sufficiently cooled by the second low-temperature refrigerant 502 and the first low-temperature refrigerant 501, respectively, so the secondary battery 30 can be cooled. That is, the coolant layer 200 can cool the secondary battery 30 uniformly.

[0294] In addition, the determination process of the circulation direction of the coolant in the coolant circuit 700 can be performed by a predetermined ECU (Electronic Control Unit) or the like provided in the vehicle 1. For example, the ECU obtains the measurement result of the temperature of the coolant flowing in the coolant circuit 700 and the measurement result of the temperature of the outside air. And, when the measurement result of the temperature of the coolant flowing in the coolant circuit 700 is lower than the measurement result of the temperature of the outside air, the ECU switches the circulation direction so that the coolant is input to the first coolant input / output unit 201 and output from the second coolant input / output unit 202, and when the measurement result of the temperature of the coolant flowing in the coolant circuit 700 is higher than the measurement result of the temperature of the outside air, the ECU switches the circulation direction so that the coolant is input to the second coolant input / output unit 202 and output from the first coolant input / output unit 201.

[0295] <Appendix to Implementation Method 2>

[0296] The following technology is disclosed by the description of the above embodiment 2.

[0297] <Technique B1>

[0298] A vehicle comprising:

[0299] Car body;

[0300] A first wheel and a second wheel, which are combined with the vehicle body;

[0301] a secondary battery arranged along a predetermined surface in the vehicle body;

[0302] a heat exchange plate disposed along the predetermined surface in the vehicle body; and

[0303] a motor that drives at least the first wheel using electric power supplied from the secondary battery,

[0304] The vehicle is capable of moving in a predetermined direction using the first wheel and the second wheel.

[0305] In the vehicle,

[0306] The heat exchange plate has:

[0307] a first surface, which is arranged along the predetermined surface and is capable of exchanging heat with the secondary battery;

[0308] a second surface arranged along the predetermined surface and located on the opposite side of the first surface;

[0309] a first end portion, which is an end portion in the predetermined direction;

[0310] a second end portion located on the opposite side of the first end portion in the predetermined direction;

[0311] A refrigerant input portion, which is disposed at the first end portion and allows the refrigerant to enter the heat exchange plate;

[0312] A refrigerant output portion, which is disposed at the first end portion and allows the refrigerant to exit from the heat exchange plate;

[0313] a first refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction;

[0314] a second refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction;

[0315] a third refrigerant flow path connected to the refrigerant input portion and arranged between the first surface and the second surface along the predetermined direction between the first refrigerant flow path and the second refrigerant flow path;

[0316] a first connecting refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface; and

[0317] a second connecting refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface,

[0318] The refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the first connected refrigerant flow path and the first refrigerant flow path, and the refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the second connected refrigerant flow path and the second refrigerant flow path,

[0319] The heat exchange plate also has:

[0320] A first cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting cooling liquid relative to the heat exchange plate;

[0321] a second cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting the cooling liquid relative to the heat exchange plate;

[0322] a first coolant flow path connected to the first coolant input / output portion and configured between the first surface and the second surface along the predetermined direction so that the distance from the third refrigerant flow path is smaller than the distance from the second refrigerant flow path;

[0323] a second coolant flow path connected to the second coolant input / output portion and configured between the first surface and the second surface along the predetermined direction so that the distance from the second refrigerant flow path is smaller than the distance from the third refrigerant flow path;

[0324] a third coolant flow path connected to the first coolant input / output portion and configured between the first surface and the second surface along the predetermined direction so that the distance from the third refrigerant flow path is smaller than the distance from the first refrigerant flow path;

[0325] a fourth coolant flow path connected to the second coolant input / output portion and configured between the first surface and the second surface along the predetermined direction so that the distance from the first refrigerant flow path is smaller than the distance from the third refrigerant flow path;

[0326] a first connecting coolant flow path connecting the first coolant flow path and the second coolant flow path at the second end; and

[0327] a second connecting coolant flow path connecting the third coolant flow path and the fourth coolant flow path at the second end portion,

[0328] The coolant entering the heat exchange plate from the first coolant input and output part can move from the first coolant flow path to the second coolant input and output part via the first connecting coolant flow path and the second coolant flow path, and the coolant entering the heat exchange plate from the first coolant input and output part can move from the third coolant flow path to the second connecting coolant flow path and the fourth coolant flow path to the second coolant input and output part.

[0329] <Technique B2> A vehicle according to Technique B1, wherein:

[0330] Between the first surface and the second surface,

[0331] At least the first coolant flow path, the second coolant flow path, the third coolant flow path, and the fourth coolant flow path are arranged closer to the first surface than the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path.

[0332] <Technique B3> A vehicle according to Technique B1 or B2, wherein:

[0333] Between the first surface and the second surface,

[0334] At least the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path are arranged closer to the first surface than the first coolant flow path, the second coolant flow path, the third coolant flow path, and the fourth coolant flow path.

[0335] <Technique B4> A vehicle according to any one of Techniques B1 to B3, wherein:

[0336] The vehicle further includes a coolant circuit connected to the first coolant input / output portion and the second coolant input / output portion and configured to circulate the coolant.

[0337] <Technique B5> A vehicle according to Technique B4, wherein:

[0338] When the temperature of the coolant flowing in the coolant circuit is lower than the temperature of the outside air, the coolant is input to the first coolant input / output portion and output from the second coolant input / output portion.

[0339] <Technique B6> A vehicle according to Technique B4 or B5, wherein:

[0340] When the temperature of the coolant flowing in the coolant circuit is higher than the temperature of the outside air, the coolant is input to the second coolant input / output portion and output from the first coolant input / output portion.

[0341] <Technique B7> A vehicle according to any one of Techniques B1 to B6, wherein:

[0342] The heat exchange plate also has:

[0343] at least one first branch refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path; and

[0344] At least one second branch refrigerant flow path connects the third refrigerant flow path and the second refrigerant flow path.

[0345] <Technique B8> A vehicle according to any one of Techniques B1 to B7, wherein:

[0346] The vehicle includes a refrigerant circuit connected to the refrigerant input unit and the refrigerant output unit, including at least a compressor and a condenser, and through which the refrigerant flows.

[0347] <Technique B9> A heat exchange plate that can be mounted on a vehicle, the vehicle comprising:

[0348] Car body;

[0349] A first wheel and a second wheel, which are combined with the vehicle body;

[0350] a secondary battery arranged along a predetermined surface in the vehicle body; and

[0351] a motor that drives at least the first wheel using electric power supplied from the secondary battery,

[0352] The vehicle is capable of moving in a predetermined direction using the first wheel and the second wheel.

[0353] The heat exchange plate includes:

[0354] a first surface, which is arranged along the predetermined surface and is capable of exchanging heat with the secondary battery;

[0355] a second surface arranged along the predetermined surface and located on the opposite side of the first surface;

[0356] a first end portion, which is an end portion in the predetermined direction;

[0357] a second end portion located on the opposite side of the first end portion in the predetermined direction;

[0358] A refrigerant input portion, which is disposed at the first end portion and allows the refrigerant to enter the heat exchange plate;

[0359] A refrigerant output portion, which is disposed at the first end portion and allows the refrigerant to exit from the heat exchange plate;

[0360] a first refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction;

[0361] a second refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction;

[0362] a third refrigerant flow path connected to the refrigerant input portion and arranged between the first surface and the second surface along the predetermined direction between the first refrigerant flow path and the second refrigerant flow path;

[0363] a first connecting refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface; and

[0364] a second connecting refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface,

[0365] The refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the first connected refrigerant flow path and the first refrigerant flow path, and the refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the second connected refrigerant flow path and the second refrigerant flow path,

[0366] The heat exchange plate also has:

[0367] A first cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting cooling liquid relative to the heat exchange plate;

[0368] a second cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting the cooling liquid relative to the heat exchange plate;

[0369] a first coolant flow path connected to the first coolant input / output portion and configured between the first surface and the second surface along the predetermined direction so that the distance from the third refrigerant flow path is smaller than the distance from the second refrigerant flow path;

[0370] a second coolant flow path connected to the second coolant input / output portion and configured between the first surface and the second surface along the predetermined direction so that the distance from the second refrigerant flow path is smaller than the distance from the third refrigerant flow path;

[0371] a third coolant flow path connected to the first coolant input / output portion and configured between the first surface and the second surface along the predetermined direction so that the distance from the third refrigerant flow path is smaller than the distance from the first refrigerant flow path;

[0372] a fourth coolant flow path connected to the second coolant input / output portion and configured between the first surface and the second surface along the predetermined direction so that the distance from the first refrigerant flow path is smaller than the distance from the third refrigerant flow path;

[0373] a first connecting coolant flow path connecting the first coolant flow path and the second coolant flow path at the second end; and

[0374] a second connecting coolant flow path connecting the third coolant flow path and the fourth coolant flow path at the second end portion,

[0375] The coolant entering the heat exchange plate from the first coolant input and output part can move from the first coolant flow path to the second coolant input and output part via the first connecting coolant flow path and the second coolant flow path, and the coolant entering the heat exchange plate from the first coolant input and output part can move from the third coolant flow path to the second connecting coolant flow path and the fourth coolant flow path to the second coolant input and output part.

[0376] <Technique B10> The heat exchange plate according to Technique B9, wherein:

[0377] Between the first surface and the second surface,

[0378] At least the first coolant flow path, the second coolant flow path, the third coolant flow path, and the fourth coolant flow path are arranged closer to the first surface than the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path.

[0379] <Technique B11> The heat exchange plate according to Technique B9 or B10, wherein:

[0380] Between the first surface and the second surface,

[0381] At least the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path are arranged closer to the first surface than the first coolant flow path, the second coolant flow path, the third coolant flow path, and the fourth coolant flow path.

[0382] <Technique B12> The heat exchange plate according to any one of Techniques 9 to 11, wherein:

[0383] A coolant circuit provided in the vehicle body and through which the coolant circulates can be connected to the first coolant input / output portion and the second coolant input / output portion.

[0384] <Technique B13> The heat exchange plate according to Technique B12, wherein:

[0385] When the temperature of the coolant flowing in the coolant circuit is lower than the temperature of the outside air, the coolant is input to the first coolant input / output portion and output from the second coolant input / output portion.

[0386] <Technique B14> The heat exchange plate according to Technique B12 or B13, wherein:

[0387] When the temperature of the coolant flowing in the coolant circuit is higher than the temperature of the outside air, the coolant is input to the second coolant input / output portion and output from the first coolant input / output portion.

[0388] <Technique B15> The heat exchange plate according to any one of Techniques B9 to B14, wherein:

[0389] The heat exchange plate also has:

[0390] at least one first branch refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path; and

[0391] At least one second branch refrigerant flow path connects the third refrigerant flow path and the second refrigerant flow path.

[0392] <Technique B16> The heat exchange plate according to any one of Techniques B9 to B15, wherein:

[0393] A refrigerant circuit provided to the vehicle body can be connected to the refrigerant input portion and the refrigerant output portion, the refrigerant circuit having at least a compressor and a condenser through which the refrigerant flows.

[0394] (Implementation method 3)

[0395] Fig.13 It is a plan view showing a structural example of a heat exchange plate 100 according to the third embodiment.

[0396] The refrigerant layer 300 in Embodiment 3 may have the same structure as the refrigerant layer 300 in Embodiment 1. Therefore, the description of the refrigerant layer 300 is omitted here.

[0397] The coolant layer 200 includes a first coolant input / output portion 201 , a second coolant input / output portion 202 , a first coolant channel 801 , a second coolant channel 802 , a third connecting coolant channel 803 , and a fourth connecting coolant channel 804 .

[0398] The first coolant input and output portion 201 is disposed at the first end portion 71 , and is used to input and output the coolant to and from the heat exchange plate 100 .

[0399] The second coolant input and output portion 202 is disposed at the first end portion 71 , and is used to input and output the coolant to and from the heat exchange plate 100 .

[0400] The first coolant flow path 801 is connected to the first coolant input / output portion 201 , and is arranged along a predetermined direction (eg, the Y-axis direction) between the first surface 101 and the second surface 102 .

[0401] The second coolant flow path 802 is connected to the second coolant input / output portion 202 , and is arranged along a predetermined direction (eg, the Y-axis direction) between the first surface 101 and the second surface 102 .

[0402] The first cooling liquid flow path 801 may overlap at least a portion of the second refrigerant flow path 312, at least a portion of the second branch refrigerant flow path 332, and at least a portion of the third refrigerant flow path 313 when viewed from above. Therefore, the cooling liquid flowing in the first cooling liquid flow path 211 mainly exchanges heat with the second low-temperature refrigerant 502 and the second high-temperature refrigerant 512 flowing in the refrigerant layer 300.

[0403] The second coolant flow path 802 may overlap at least a portion of the first refrigerant flow path 311, at least a portion of the first branch refrigerant flow path 331, and at least a portion of the third refrigerant flow path 313 when viewed from above. Therefore, the coolant flowing in the second coolant flow path 212 mainly exchanges heat with the first low-temperature refrigerant 501 and the first high-temperature refrigerant 511 flowing in the refrigerant layer 300.

[0404] The third connecting coolant flow path 803 connects at the second end 72 a portion of the first coolant flow path 211 whose distance from the third refrigerant flow path 313 is smaller than that from the second refrigerant flow path 312 and a portion of the second coolant flow path 212 whose distance from the third refrigerant flow path 313 is smaller than that from the first refrigerant flow path 311.

[0405] The fourth connecting coolant flow path 804 connects at the second end 72 a portion of the first coolant flow path 211 whose distance from the second refrigerant flow path 312 is smaller than a distance from the third refrigerant flow path 313 and a portion of the second coolant flow path 212 whose distance from the first refrigerant flow path 311 is smaller than a distance from the third refrigerant flow path 313.

[0406] like Fig.13 As shown, the third connected coolant flow path 803 and the fourth connected coolant flow path 804 can be realized by providing a partition wall 810 in the coolant layer 200 .

[0407] According to this structure, the coolant flows to each corner on the second end 72 side in the coolant layer 200. Therefore, the coolant layer 200 can also appropriately cool the secondary battery 30 arranged near the corner on the second end 72 side.

[0408] The above embodiment is described with reference to the accompanying drawings, but the present invention is not limited to this example. It is understood that if a person skilled in the art can think of various changes, corrections, substitutions, additions, deletions, and equivalents within the scope of the claims, it is obvious that these also belong to the protection scope of the present invention. In addition, the various constituent elements in the above embodiment can be arbitrarily combined within the scope of the main purpose of the invention.

[0409] In addition, this application is based on the application of Japanese invention patent application (Special Application No. 2022-106394) filed on June 30, 2022, and the contents of the Japanese invention patent application are cited in this application as a reference. In addition, this application is based on the application of Japanese invention patent application (Special Application No. 2022-106395) filed on June 30, 2022, and the contents of the Japanese invention patent application are cited in this application as a reference.

[0410] Industrial Applicability

[0411] The technology of the present invention can be applied to heat exchange plates with cooling liquid and refrigerant.

[0412] Description of Reference Numerals

[0413] 1. Vehicle; 2. Vehicle body; 3. Wheel; 3a. First wheel; 3b. Second wheel; 4. Motor; 10. Battery pack; 20. Housing; 30. Secondary battery; 71. First end; 72. Second end; 100. Heat exchange plate; 100A. First heat exchange plate; 100B. Second heat exchange plate; 101. First surface; 102. Second surface; 200. Coolant layer; 201. First coolant input / output unit; 202. 2nd cooling liquid input / output part; 211, 1st cooling liquid flow path; 212, 2nd cooling liquid flow path; 221, 1st connecting cooling liquid flow path; 222, 2nd connecting cooling liquid flow path; 231, 1st branch flow path; 232, 2nd branch flow path; 233, 3rd branch flow path; 234, 4th branch flow path; 300, refrigerant layer; 301, refrigerant input part; 302, refrigerant output part; 311, 1st refrigerant flow path; 312 , the second refrigerant flow path; 313, the third refrigerant flow path; 321, the first connected refrigerant flow path; 322, the second connected refrigerant flow path; 331, the first branch refrigerant flow path; 332, the second branch refrigerant flow path; 401, the first coolant flow path; 402, the second coolant flow path; 403, the third coolant flow path; 404, the fourth coolant flow path; 411, the first connected coolant flow path; 412, the second connected coolant flow path Cooling liquid flow path; 501, the first low-temperature refrigerant; 502, the second low-temperature refrigerant; 511, the first high-temperature refrigerant; 512, the second high-temperature refrigerant; 600, the refrigerant circuit; 601, the compressor; 602, the condenser; 700, the cooling liquid circuit; 801, the first cooling liquid flow path; 802, the second cooling liquid flow path; 803, the third connecting cooling liquid flow path; 804, the fourth connecting cooling liquid flow path; 810, the partition wall.

Claims

1. A vehicle comprising: Car body; A first wheel and a second wheel, which are combined with the vehicle body; a secondary battery arranged along a predetermined surface in the vehicle body; a heat exchange plate disposed along the predetermined surface in the vehicle body; as well as a motor that drives at least the first wheel using electric power supplied from the secondary battery, The vehicle is capable of moving in a predetermined direction using the first wheel and the second wheel. In the vehicle, The heat exchange plate has: a first surface, which is arranged along the predetermined surface and is capable of exchanging heat with the secondary battery; a second surface arranged along the predetermined surface and located on the opposite side of the first surface; a first end portion, which is an end portion in the predetermined direction; a second end portion located on the opposite side of the first end portion in the predetermined direction; A refrigerant input portion, which is disposed at the first end portion and allows the refrigerant to enter the heat exchange plate; A refrigerant output portion, which is disposed at the first end portion and allows the refrigerant to exit from the heat exchange plate; a first refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction; a second refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction; a third refrigerant flow path connected to the refrigerant input portion and arranged between the first surface and the second surface along the predetermined direction between the first refrigerant flow path and the second refrigerant flow path; a first connecting refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface; and a second connecting refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface, The refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the first connected refrigerant flow path and the first refrigerant flow path, and the refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the second connected refrigerant flow path and the second refrigerant flow path, The heat exchange plate also has: A first cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting cooling liquid relative to the heat exchange plate; a second cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting the cooling liquid relative to the heat exchange plate; a first cooling liquid flow path connected to the first cooling liquid input / output portion and arranged between the first surface and the second surface along the predetermined direction; a second cooling liquid flow path connected to the second cooling liquid input and output portion and arranged between the first surface and the second surface along the predetermined direction; a first connecting coolant flow path that connects, at the second end, a portion of the first coolant flow path that is closer to the second refrigerant flow path than to the third refrigerant flow path and a portion of the second coolant flow path that is closer to the third refrigerant flow path than to the second refrigerant flow path; as well as a second connecting coolant flow path, which connects at the second end a portion of the first coolant flow path whose distance from the third refrigerant flow path is smaller than that from the second refrigerant flow path and a portion of the second coolant flow path whose distance from the first refrigerant flow path is smaller than that from the third refrigerant flow path, The coolant entering the heat exchange plate from the first coolant input and output part can move from the first coolant flow path to the second coolant input and output part via the first connecting coolant flow path and the second coolant flow path, and the coolant entering the heat exchange plate from the first coolant input and output part can move from the first coolant flow path to the second coolant input and output part via the second connecting coolant flow path and the second coolant flow path.

2. The vehicle according to claim 1, wherein: The first cooling liquid flow path includes between the first surface and the second surface: a first branch flow path, which is arranged to be closer to the second refrigerant flow path than to the third refrigerant flow path, and is connected to the first connecting coolant flow path; as well as a second branch flow path, which is arranged to be closer to the third refrigerant flow path than to the second refrigerant flow path, and is connected to the second connecting coolant flow path; The second coolant flow path includes between the first surface and the second surface: a third branch flow path, which is arranged to be closer to the third refrigerant flow path than to the first refrigerant flow path and is connected to the first connection coolant flow path; as well as The fourth branch flow path is arranged so that the distance from the first refrigerant flow path is smaller than the distance from the third refrigerant flow path, and is connected to the second connection coolant flow path.

3. The vehicle according to claim 1, wherein: The heat exchange plate also has: at least one first branch refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path; and At least one second branch refrigerant flow path connects the third refrigerant flow path and the second refrigerant flow path.

4. The vehicle according to claim 1, wherein: Between the first surface and the second surface, At least the first coolant flow path and the second coolant flow path are arranged closer to the first surface than the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path.

5. The vehicle according to claim 1, wherein: Between the first surface and the second surface, At least the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path are arranged closer to the first surface than the first coolant flow path and the second coolant flow path.

6. The vehicle according to claim 1, wherein: The first connection coolant flow path and the second connection coolant flow path are respectively formed of hoses.

7. The vehicle according to claim 6, wherein: The heat exchange plate is composed of a first heat exchange plate and a second heat exchange plate. The first coolant flow path is formed in the first heat exchange plate. The second coolant flow path is formed in the second heat exchange plate.

8. The vehicle of claim 1, wherein: The first connection coolant flow path and the second connection coolant flow path are three-dimensionally intersecting structures.

9. The vehicle of claim 1, wherein: The vehicle includes a coolant circuit connected to the first coolant input / output portion and the second coolant input / output portion and configured to circulate the coolant.

10. The vehicle of claim 1, wherein: The vehicle includes a refrigerant circuit connected to the refrigerant input unit and the refrigerant output unit, including at least a compressor and a condenser, and through which the refrigerant flows.

11. A heat exchange plate, which is a heat exchange plate that can be installed in a vehicle, the vehicle comprising: Car body; A first wheel and a second wheel, which are combined with the vehicle body; a secondary battery arranged along a predetermined surface in the vehicle body; and a motor that drives at least the first wheel using electric power supplied from the secondary battery, The vehicle is capable of moving in a predetermined direction using the first wheel and the second wheel. The heat exchange plate includes: a first surface, which is arranged along the predetermined surface and is capable of exchanging heat with the secondary battery; a second surface arranged along the predetermined surface and located on the opposite side of the first surface; a first end portion, which is an end portion in the predetermined direction; a second end portion located on the opposite side of the first end portion in the predetermined direction; A refrigerant input portion, which is disposed at the first end portion and allows the refrigerant to enter the heat exchange plate; A refrigerant output portion, which is disposed at the first end portion and allows the refrigerant to exit from the heat exchange plate; a first refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction; a second refrigerant flow path connected to the refrigerant output portion and arranged between the first surface and the second surface along the predetermined direction; a third refrigerant flow path connected to the refrigerant input portion and arranged between the first surface and the second surface along the predetermined direction between the first refrigerant flow path and the second refrigerant flow path; a first connecting refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface; and a second connecting refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface, The refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the first connected refrigerant flow path and the first refrigerant flow path, and the refrigerant entering the heat exchange plate from the refrigerant input part can move from the third refrigerant flow path to the refrigerant output part via the second connected refrigerant flow path and the second refrigerant flow path, The heat exchange plate also has: A first cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting cooling liquid relative to the heat exchange plate; a second cooling liquid input and output portion, which is disposed at the first end portion and is used for inputting and outputting the cooling liquid relative to the heat exchange plate; a first cooling liquid flow path connected to the first cooling liquid input / output portion and arranged between the first surface and the second surface along the predetermined direction; a second cooling liquid flow path connected to the second cooling liquid input and output portion and arranged between the first surface and the second surface along the predetermined direction; a first connecting coolant flow path that connects, at the second end, a portion of the first coolant flow path that is closer to the second refrigerant flow path than to the third refrigerant flow path and a portion of the second coolant flow path that is closer to the third refrigerant flow path than to the second refrigerant flow path; as well as a second connecting coolant flow path, which connects at the second end a portion of the first coolant flow path whose distance from the third refrigerant flow path is smaller than that from the second refrigerant flow path and a portion of the second coolant flow path whose distance from the first refrigerant flow path is smaller than that from the third refrigerant flow path, The coolant entering the heat exchange plate from the first coolant input and output part can move from the first coolant flow path to the second coolant input and output part via the first connecting coolant flow path and the second coolant flow path, and the coolant entering the heat exchange plate from the first coolant input and output part can move from the first coolant flow path to the second coolant input and output part via the second connecting coolant flow path and the second coolant flow path.

12. The heat exchange plate according to claim 11, wherein: The first cooling liquid flow path includes between the first surface and the second surface: a first branch flow path, which is arranged to be closer to the second refrigerant flow path than to the third refrigerant flow path, and is connected to the first connecting coolant flow path; as well as a second branch flow path, which is arranged to be closer to the third refrigerant flow path than to the second refrigerant flow path, and is connected to the second connecting coolant flow path; The second coolant flow path includes between the first surface and the second surface: a third branch flow path, which is arranged to be closer to the third refrigerant flow path than to the first refrigerant flow path and is connected to the first connection coolant flow path; as well as The fourth branch flow path is arranged so that the distance from the first refrigerant flow path is smaller than the distance from the third refrigerant flow path, and is connected to the second connection coolant flow path.

13. The heat exchange plate according to claim 11, wherein: The heat exchange plate also has: at least one first branch refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path; and At least one second branch refrigerant flow path connects the third refrigerant flow path and the second refrigerant flow path.

14. The heat exchange plate according to claim 11, wherein: Between the first surface and the second surface, At least the first coolant flow path and the second coolant flow path are arranged closer to the first surface than the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path.

15. The heat exchange plate according to claim 11, wherein: Between the first surface and the second surface, At least the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path are arranged closer to the first surface than the first coolant flow path and the second coolant flow path.

16. The heat exchange plate according to claim 11, wherein: The first connection coolant flow path and the second connection coolant flow path are respectively formed of hoses.

17. The heat exchange plate according to claim 16, wherein: The heat exchange plate is composed of a first heat exchange plate and a second heat exchange plate. The first coolant flow path is formed in the first heat exchange plate. The second coolant flow path is formed in the second heat exchange plate.

18. The heat exchange plate according to claim 11, wherein: The first connection coolant flow path and the second connection coolant flow path are three-dimensionally intersecting structures.

19. The heat exchange plate according to claim 11, wherein: A coolant circuit provided in the vehicle body and through which the coolant circulates can be connected to the first coolant input / output portion and the second coolant input / output portion.

20. The heat exchange plate according to claim 11, wherein: A refrigerant circuit provided to the vehicle body can be connected to the refrigerant input portion and the refrigerant output portion, the refrigerant circuit having at least a compressor and a condenser through which the refrigerant flows.

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