WO2019022023A1 - Cooling water circuit - Google Patents

Abstract

The present invention controls a first pump (61), a second pump (63), a first switching valve (60), and a second switching valve (62), and makes it possible to execute multiple control modes for changing, in accordance with the outside air temperature or battery water temperature, the flow of cooling water in a first cooling water pathway (101), a second cooling water pathway (102), a third cooling water pathway (201), a fourth cooling water pathway (202), and a bypass pathway (30).

Description

Cooling water circuit Cross-reference to related applications

The present application is based on Japanese Patent Application No. 201-142941 filed on July 24, 2017, Japanese Patent Application No. 201-142936 filed on July 24, 2017, and July 24 2017. Patent No. 2017-24938 filed in the United States of America and Japanese Patent Application No. 2018-089205 filed on May 7, 2018, claiming the benefit of its priority And the entire content of that patent application is incorporated herein by reference.

The present disclosure relates to a coolant circuit.

Various electric vehicles are known which are equipped with a battery and whose motor is a main power source or a secondary power source. In such an electric vehicle, for example, as described in Patent Document 1 below, a cooling circuit for cooling a motor or an inverter and a cooling circuit for cooling a battery are provided. The required cooling water temperature may differ between the cooling circuit for cooling the motor and the inverter and the cooling circuit for cooling the battery, so the cooling water is circulated independently. However, depending on the outside air temperature condition and the like, it may be preferable to circulate the cooling water through both the cooling circuit for cooling the motor and the inverter and the cooling circuit for cooling the battery. Furthermore, the cooling water may flow only to a part of the cooling circuit for cooling the motor and the inverter and the cooling circuit for cooling the battery.

German Patent Application Publication No. 102011090147

In patent document 1, in order to implement | achieve the circulation aspect of various cooling water in the cooling circuit for cooling a motor or an inverter, and the cooling circuit for cooling a battery, many valves are provided. Since the increase in the number of active components affects the reliability and cost, there is a demand to reduce the number of valves and pumps that are active components as long as the function of the entire cooling water circuit is not impaired.

An object of the present disclosure is to provide a coolant circuit capable of realizing a desired circulation mode while suppressing the number of valves and pumps.

The present disclosure relates to a cooling water circuit including a first cooling water flow path (101) to which a first radiator (40) is connected, a motor generator cooling unit (42) for cooling a motor generator, and an inverter for cooling an inverter. A second cooling water flow passage (102) for passing cooling water through the cooling unit (41), a third cooling water flow passage (201) to which the second radiator (50) is connected, and a battery cooling unit (51) for cooling the battery And a fourth cooling water channel (202) for passing cooling water through a chiller (52) which constitutes a part of the refrigeration circuit, and a fourth cooling water channel without passing through the first cooling water channel and the third cooling water channel A bypass flow passage (30) for circulating the cooling water, a first pump (61) arranged to allow the cooling water to flow in at least the second cooling water flow passage, and at least a fourth cooling water flow passage Cooling to The second pump (63) arranged to be able to flow the first coolant water channel, the second coolant water channel, the third coolant water channel, the fourth coolant water channel, and the bypass flow The flow paths are switched between the paths, so that the inflows of the cooling water flowing through the first cooling water flow path and the third cooling water flow path into the fourth cooling water flow path can be adjusted by cooperating with each other Control the first switching valve (60) and the second switching valve (62), the first pump, the second pump, the first switching valve, and the second switching valve, according to the outside air temperature or the battery water temperature An electronic control unit capable of executing a plurality of control modes for changing the flow of cooling water in the first cooling water flow channel, the second cooling water flow channel, the third cooling water flow channel, the fourth cooling water flow channel, and the bypass flow channel And 3).

Since the allowable water temperature, which is the temperature for cooling the battery, and the allowable water temperature, which is the temperature for cooling the motor generator and the inverter, are different from each other, the second cooling water flow path and the fourth cooling water flow path are provided. By disposing the pump and the second pump, it is possible to supply cooling water at a temperature suitable for the respective allowable water temperature. By switching the first switching valve and the second switching valve, for example, warm-up can be performed without turning the cooling water to the first radiator and the second radiator when the outside air temperature is low. Furthermore, since the bypass flow path for circulating the cooling water in the fourth cooling water flow path without passing through the first cooling water flow path and the third cooling water flow path, the outside air temperature is higher than the allowable water temperature of the battery, for example. It is possible to prevent the temperature of the cooling water from rising by passing through the first radiator and the second radiator when the outside air temperature is high, and the cooling water can be cooled only by the chiller.

The present disclosure relates to a cooling water circuit, which is controlled by a motor generator cooling unit (42) for cooling a motor generator, an inverter cooling unit (41) for cooling an inverter, and an electronic control unit (3). A first circuit (10, 10A) in which a first pump (61) to be circulated and a first radiator (40) are connected to each other by a cooling water flow passage (101, 102), and a battery cooling portion ( 51), a chiller (52) constituting a part of a refrigeration circuit, a second pump (63) controlled by the electronic control unit to circulate cooling water, and a second radiator (50) And a second circuit (20, 20A, 20B) connected by (201, 202). The cooling water circuit is provided with a first connection portion (103) provided in a cooling water flow passage connected to one outflow inlet / outlet side of the first radiator, and a cooling water flow passage connected to one outflow / inflow inlet side of the second radiator A first connection channel (31) connecting the second connection section (203), and a third connection section (104) provided in a cooling water channel connected to the other outlet / inlet side of the first radiator; 2) A second connection channel (32) connecting the fourth connection (204) provided in the cooling water channel connected to the other outlet / inlet side of the radiator, and the battery and chiller without passing through the second radiator A bypass flow passage (30) for circulating water and a first switching valve (60) and a second switching valve (62) controlled by the electronic control unit to switch the flow of the cooling water are provided. There is.

Since the allowable water temperature which is the temperature for cooling the battery and the allowable water temperature which is the temperature for cooling the motor generator and the inverter are different from each other, the first circuit and the second circuit are provided. By arranging a pump, it is possible to supply cooling water of a temperature suitable for each allowable water temperature. The first connection flow path connects the first connection portion and the second connection portion, and the second connection flow path connects the third connection portion and the fourth connection portion. By switching the second switching valve, for example, warm-up can be performed without turning the cooling water to the first radiator and the second radiator when the outside air temperature is low. Furthermore, since the bypass flow path for circulating the cooling water to the battery cooling unit and the chiller without passing through the second radiator is provided, for example, the second radiator is used at high outside air temperatures where the outside air temperature is higher than the allowable water temperature of the battery. Passing through prevents the temperature of the cooling water from rising, and the cooling water can be cooled by the chiller alone.

The present disclosure relates to a cooling water circuit, which is controlled by a motor generator cooling unit (42) for cooling a motor generator, an inverter cooling unit (41) for cooling an inverter, and an electronic control unit (3). A first circuit (10D, 10G) in which a first pump (61) to be circulated and a first radiator (40) are connected to each other by a cooling water flow passage (101, 102), and a battery cooling portion ( 51), a chiller (52) constituting a part of a refrigeration circuit, a second pump (63) controlled by the electronic control unit to circulate cooling water, and a second radiator (50) And a second circuit (20D, 20E, 20F) connected by (201, 202). The cooling water circuit is provided with a first connection portion (103) provided in a cooling water flow passage connected to one outflow inlet / outlet side of the first radiator, and a cooling water flow passage connected to one outflow / inflow inlet side of the second radiator A first connection channel (31) connecting the second connection section (203), and a third connection section (104) provided in a cooling water channel connected to the other outlet / inlet side of the first radiator; 2) A second connection channel (32) connecting the fourth connection (204) provided in the cooling water channel connected to the other outlet / inlet side of the radiator, and the battery and chiller without passing through the second radiator In order to circulate water, a bypass flow passage (30) connecting the fifth connection portion (205) and the sixth connection portion (206) provided in the cooling water flow passage of the second circuit and the flow of the cooling water are switched Control by the electronic control unit to A switching valve (60) and a second switching valve (62), is provided.

Since the allowable water temperature which is the temperature for cooling the battery and the allowable water temperature which is the temperature for cooling the motor generator and the inverter are different from each other, the first circuit and the second circuit are provided. By arranging a pump, it is possible to supply cooling water of a temperature suitable for each allowable water temperature. The first connection flow path connects the first connection portion and the second connection portion, and the second connection flow path connects the third connection portion and the fourth connection portion. By switching the second switching valve, for example, warm-up can be performed without turning the cooling water to the first radiator and the second radiator when the outside air temperature is low. Furthermore, since the bypass flow path for circulating the cooling water to the battery cooling unit and the chiller without passing through the second radiator is provided, for example, the second radiator is used at high outside air temperatures where the outside air temperature is higher than the allowable water temperature of the battery. Passing through prevents the temperature of the cooling water from rising, and the cooling water can be cooled by the chiller alone.

The present disclosure relates to a cooling water circuit, which is controlled by a motor generator cooling unit (42) for cooling a motor generator, an inverter cooling unit (41) for cooling an inverter, and an electronic control unit (3). A battery is cooled by a first circuit (10H, 10L) in which a first pump (61), a first radiator (40), and a second radiator (50) to be circulated are mutually connected by a cooling water flow path A battery cooling unit (51), a chiller (52) constituting a part of a refrigeration circuit, and a second pump (63) controlled by the electronic control unit to circulate cooling water are mutually connected in the cooling water flow path. And a second circuit (20H, 20J, 20K). The cooling water flow passage of the first circuit includes a first cooling water flow passage (101) provided with a first radiator, and a second cooling water flow passage (102) provided with a motor generator cooling unit and an inverter cooling unit. And a third cooling water flow path (201) provided with a second radiator, wherein the first cooling water flow path and the second cooling water flow path have a first connection portion (103) at one end and the other end respectively The third connection channel (104) is connected, and one end of the third coolant channel is connected to the first channel and the other end is connected to the second connector. The cooling water flow path of the second circuit is provided with a bypass flow path (30) for circulating the cooling water to the battery and the chiller without passing through the first radiator and the second radiator, and a fourth cooling provided with the battery cooling unit and the chiller One end and the other end of the bypass flow channel and the fourth cooling water flow channel are connected to each other at the fourth connection portion (203) and the fifth connection portion (204). Furthermore, a third connection provided in the middle of a first connection flow path (31) connecting the first connection portion and the fourth connection portion, and a third cooling water flow path extending from the second radiator to the second connection portion A second connection passage (32) connecting the unit (106) and the fifth connection unit, and a first switching valve (60) and a second control valve controlled by the electronic control unit to switch the flow of cooling water 2 and a switching valve (62) are provided.

Since the allowable water temperature which is the temperature for cooling the battery and the allowable water temperature which is the temperature for cooling the motor generator and the inverter are different from each other, the first circuit and the second circuit are provided. By arranging a pump, it is possible to supply cooling water of a temperature suitable for each allowable water temperature. The first connection flow path connects the first connection portion and the fourth connection portion, and the second connection flow path connects the third connection portion and the fifth connection portion. By switching the second switching valve, for example, it is possible to prevent the flow of cooling water to the first cooling water flow channel side at low outside air temperature, and without turning the cooling water to the first radiator and the second radiator, It can warm up. Furthermore, since the second circuit is not provided with a radiator that exchanges heat with the outside air, for example, when the outside air temperature is higher than the allowable water temperature of the battery, the temperature of the cooling water rises by passing through the radiator. It can be avoided and cooling water can be cooled only with a chiller.

The reference numerals in parentheses described in the “Summary of the invention” and the “claims” indicate the correspondence with the “embodiments for carrying out the invention” described later, and the “Summary of the Invention” and The scope of the claims does not indicate that the scope of the present invention is limited to the embodiments described below.

FIG. 1 is a view for explaining a cooling water circuit of the first embodiment. FIG. 2 is a view for explaining the cooling water circuit of the first embodiment. FIG. 3 is a view for explaining the cooling water circuit of the first embodiment. FIG. 4 is a view for explaining the cooling water circuit of the first embodiment. FIG. 5 is a view for explaining the cooling water circuit of the first embodiment. FIG. 6 is a view for explaining the cooling water circuit of the first embodiment. FIG. 7 is a diagram for explaining the cooling water circuit of the first embodiment. FIG. 8 is a view for explaining a cooling water circuit of the second embodiment. FIG. 9 is a view for explaining a cooling water circuit of the second embodiment. FIG. 10 is a view for explaining the cooling water circuit of the second embodiment. FIG. 11 is a view for explaining a cooling water circuit of the second embodiment. FIG. 12 is a view for explaining a cooling water circuit of the third embodiment. FIG. 13 is a view for explaining a cooling water circuit of the third embodiment. FIG. 14 is a view for explaining a cooling water circuit of the third embodiment. FIG. 15 is a view for explaining a cooling water circuit of the third embodiment. FIG. 16 is a view for explaining a cooling water circuit of the third embodiment. FIG. 17 is a view for explaining a cooling water circuit of the third embodiment. FIG. 18 is a view for explaining a cooling water circuit of the third embodiment. FIG. 19 is a view for explaining a cooling water circuit of the third embodiment. FIG. 20 is a view for explaining the cooling water circuit of the third embodiment. FIG. 21 is a view for explaining a cooling water circuit of the third embodiment. FIG. 22 is a view for explaining a cooling water circuit of the third embodiment. FIG. 23 is a view for explaining a cooling water circuit of the third embodiment. FIG. 24 is a diagram for explaining a cooling water circuit of the third embodiment. FIG. 25 is a view for explaining a cooling water circuit of the fourth embodiment. FIG. 26 is a view for explaining a cooling water circuit of the fourth embodiment. FIG. 27 is a view for explaining a cooling water circuit of the fourth embodiment. FIG. 28 is a view for explaining a cooling water circuit of the fourth embodiment. FIG. 29 is a view for explaining a cooling water circuit of the fourth embodiment. FIG. 30 is a view for explaining a cooling water circuit of the fourth embodiment. FIG. 31 is a diagram for explaining a cooling water circuit of the fourth embodiment. FIG. 32 is a diagram for explaining a cooling water circuit of the fourth embodiment. FIG. 33 is a diagram for explaining a cooling water circuit according to a fourth embodiment. FIG. 34 is a diagram for explaining a cooling water circuit of the fourth embodiment. FIG. 35 is a diagram for explaining a cooling water circuit of the fourth embodiment. FIG. 36 is a view for explaining a cooling water circuit of the fourth embodiment. FIG. 37 is a view for explaining a cooling water circuit of the fourth embodiment. FIG. 38 is a view for explaining a cooling water circuit of the fourth embodiment. FIG. 39 is a diagram for explaining a cooling water circuit of the fourth embodiment.

Hereinafter, the present embodiment will be described with reference to the attached drawings. In order to facilitate understanding of the description, the same constituent elements in the drawings are denoted by the same reference numerals as much as possible, and redundant description will be omitted.

The cooling water circuit 2 of the first embodiment constitutes a cooling system mounted on an electric vehicle. As shown in FIG. 1, the cooling water circuit 2 includes a first circuit 10, a second circuit 20, and an ECU 3 which is an electronic control unit. In the first circuit 10, a circuit in which the cooling water circulates is formed by the first cooling water flow passage 101 and the second cooling water flow passage 102. The first coolant channel 101 and the second coolant channel 102 are connected by the first connecting portion 103 and the third connecting portion 104. The first connection portion 103 is provided with a first switching valve 60 controlled by the ECU 3.

A first radiator 40 is provided in the first coolant channel 101. The first radiator 40 is a heat exchanger that exchanges heat between the cooling water passing through the first cooling water flow passage 101 and the outside air.

The second cooling water flow path 102 is provided with an inverter cooling unit 41, a motor generator cooling unit 42, and a first pump 61 controlled by the ECU 3. The inverter cooling unit 41 is a part that cools the inverter. The inverter converts direct current supplied from the battery into alternating current and supplies it to the motor generator. The motor generator cooling unit 42 is a part that cools the motor generator. The motor generator is a rotary motor having a function of generating driving force and a function of generating electric power. The allowable water temperature of the cooling water circuit for cooling the inverter and the motor generator is generally about 60.degree.

The first pump 61 is a pump that generates a flow of cooling water flowing to the inverter cooling unit 41 and the motor generator cooling unit 42. In the case of the present embodiment, the first pump 61 is disposed in the direction in which the cooling water flows from the first connection portion 103 through the inverter cooling portion 41 and the motor generator cooling portion 42 to the third connection portion 104.

In the second circuit 20, a circuit in which the cooling water circulates is formed by the third cooling water flow path 201 and the fourth cooling water flow path 202. The third cooling water channel 201 and the fourth cooling water channel 202 are connected by the second connection portion 203 and the fourth connection portion 204. The fourth connection portion 204 is provided with a second switching valve 62 controlled by the ECU 3.

A second radiator 50 is provided in the third coolant channel 201. The second radiator 50 is a heat exchanger that exchanges heat between the cooling water passing through the third cooling water passage 201 and the outside air.

In the fourth coolant channel 202, a battery cooling unit 51, a chiller 52, and a second pump 63 controlled by the ECU 3 are provided. The battery cooling unit 51 is a part that cools the battery. The battery is a power supply for driving and supplies power to the inverter. The allowable water temperature of the cooling water circuit for cooling the battery is generally about 30 ° C. or so.

The chiller 52 constitutes a part of the refrigeration circuit, and is a water refrigerant heat exchanger that exchanges heat between the refrigerant flowing in the refrigeration circuit and the cooling water flowing in the second circuit 20.

The second pump 63 is a pump that generates a flow of cooling water that flows to the battery cooling unit 51 and the chiller 52. In the case of the present embodiment, the second pump 63 is disposed in the direction in which the cooling water flows from the fourth connection portion 204 through the chiller 52 and the battery cooling portion 51 to the second connection portion 203.

The first circuit 10 and the second circuit 20 are connected by a first connection channel 31 and a second connection channel 32. The first connection flow passage 31 is a cooling water flow passage connected to one outflow / inlet side of the first radiator 40 and a cooling water flow passage connected to one outflow / inlet side of the second radiator 50. 2 connecting with the connection unit 203. The second connection passage 32 is a third connection portion 104 which is a cooling water passage connected to the other outlet / inlet side of the first radiator 40 and a cooling water passage connected to the other outlet / inlet side of the second radiator 50 4 connection portion 204 is connected. In the case of the present embodiment, the bypass flow passage 30 is provided to connect the first connection flow passage 31 and the second connection flow passage 32.

Subsequently, the operation of the cooling water circuit 2 at high outside air temperature will be described with reference to FIG. The high outside air temperature is, for example, the case where the outside air temperature is higher than the air temperature of 35 ° C. and 30 ° C. which is the allowable water temperature of the battery.

As shown in FIG. 2, the first switching valve 60 is controlled to close the first connection channel 31 side and to circulate cooling water in the first circuit 10. The second switching valve 62 closes the third coolant channel 201 side, and the coolant is controlled to circulate in the fourth coolant channel 202 and the second connection channel 32 side. Since the first switching valve 60 closes the first connection flow path 31 side, the cooling water flowing from the fourth cooling water flow path 202 into the first connection flow path 31 passes through the bypass flow path 30 to perform the second connection. It flows into the flow path 32 and returns to the fourth cooling water flow path 202.

By driving the first pump 61, the cooling water is circulated in the first circuit 10, and the cooling water cooled by the first radiator 40 can be supplied to the inverter cooling unit 41 and the motor generator cooling unit 42. Therefore, the inverter and motor generator can be cooled.

By driving the second pump 63, the cooling water is circulated from the fourth cooling water passage 202 of the second circuit 20 through the first connection passage 31, the bypass passage 30, and the second connection passage 32, and the battery The cooling water cooled by the chiller 52 can be supplied to the cooling unit 51. Thus, the battery can be cooled.

Subsequently, the operation of the cooling water circuit 2 at middle and outer air temperatures will be described with reference to FIG. The middle / outside air temperature is, for example, a case where the air temperature is about 25 ° C. and the outside air temperature is lower than 30 ° C., which is the allowable water temperature of the battery.

As shown in FIG. 3, the first switching valve 60 is controlled to close the first connection channel 31 side and to circulate cooling water in the first circuit 10. The second switching valve 62 closes the second connection flow path 32 side, and is controlled so that the cooling water circulates in the second circuit 20. Therefore, the cooling water does not flow in the first connection flow path 31 and the second connection flow path 32, and the cooling water does not flow in the bypass flow path 30. Moreover, in order to reliably avoid the inflow to the bypass flow passage 30 side, it is also preferable that a flow shut valve controlled by the ECU 3 is provided on the path of the bypass flow passage 30.

By driving the first pump 61, the cooling water is circulated in the first circuit 10, and the cooling water cooled by the first radiator 40 can be supplied to the inverter cooling unit 41 and the motor generator cooling unit 42. Therefore, the inverter and motor generator can be cooled.

By driving the second pump 63, the cooling water is circulated in the second circuit 20, and the cooling water cooled by the second radiator 50 and the chiller 52 can be supplied to the battery cooling unit 51. Thus, the battery can be cooled. In some cases, the refrigeration circuit does not operate at the middle and outside air temperatures, and the cooled refrigerant may not be supplied to the chiller 52. In this case, the cooling water is cooled only by the second radiator 50.

Subsequently, the operation of the cooling water circuit 2 at the low outside air temperature will be described with reference to FIG. The low outside air temperature is, for example, the case where the air temperature is about 5 ° C. and the battery and the motor generator also need to be warmed up.

As shown in FIG. 4, the first switching valve 60 is controlled so as to close the first cooling water flow passage 101 side and to circulate the cooling water to the second cooling water flow passage 102 and the first connection flow passage 31 side. Ru. The second switching valve 62 closes the third coolant channel 201 side, and the coolant is controlled to circulate in the second connection channel 32 side.

By driving the first pump 61 and the second pump 63, the second cooling water flow path 102 of the first circuit 10 passes through the second connection flow path 32, and the fourth cooling water flow path 202 of the second circuit 20 receives the first The cooling water flows back to the first circuit 10 through the connection flow path 31 again. Therefore, the heat generated by all the devices can be used to warm up. After the completion of the warm-up, since the cooling water becomes high temperature, the heat can be transferred to the refrigerant in the chiller 52, and the heat can be used for heating the air conditioner.

When switching from the circulation mode at low outside air temperature shown in FIG. 4 to the circulation mode at middle and outside air temperature shown in FIG. 3, it is preferable to switch the second switching valve 62 after switching the first switching valve 60 . By switching the first switching valve 60 first, the cooling water can be flowed to the first radiator 40, and the cooling means in the first circuit 10 can be secured.

Subsequently, the operation of the cooling water circuit 2 at the time of rapid charge of the battery will be described with reference to FIG. Since the battery rapidly generates heat when the battery is rapidly charged, all the elements of the coolant circuit 2 are utilized to cool the battery.

As shown in FIG. 5, the first switching valve 60 is controlled so as to close the second cooling water passage 102 side and allow the cooling water to flow to the first cooling water passage 101 and the first connection passage 31 side. . The second switching valve 62 is controlled to open all directions of the third coolant channel 201, the fourth coolant channel 202, and the second connection channel 32.

By driving the second pump 63, the cooling water flowing through the fourth cooling water flow channel 202 is divided into the third cooling water flow channel 201 side and the first connection flow channel 31 side. The cooling water having flowed into the third cooling water flow path 201 is heat-exchanged in the second radiator 50 to lower its temperature, and is returned to the fourth cooling water flow path 202. The cooling water having flowed into the first connection flow path 31 is heat-exchanged in the first radiator 40 to lower its temperature, and is returned to the fourth cooling water flow path 202. The cooling water returned to the fourth cooling water flow path 202 is further cooled in the chiller 52 and supplied to the battery cooling unit 51.

In the present embodiment, when the outside air temperature is a low temperature that requires the motor generator to be warmed up, the first switching valve 60 is a first coolant passage on the coolant passage side where the first radiator 40 is disposed. The second switching valve 62 closes the second connection flow path 32 side,
The first pump 61 and the second pump 63 can be driven.

It is preferable to switch the first switching valve 60 after switching the second switching valve 62 when the battery is rapidly charged since the outside air temperature is higher than the water temperature to be supplied to the battery cooling unit 51. On the other hand, if the outside temperature is a low temperature necessary to warm up the battery, the first switching is performed if the temperature is higher than the low temperature necessary to warm up the battery and lower than the water temperature to be supplied to the battery. It is preferable to switch the second switching valve 62 after switching the valve 60.

In the present embodiment, each of the first switching valve 60 and the second switching valve 62 is preferably configured by a three-way valve. By configuring the first switching valve 60 and the second switching valve 62 with three-way valves, the number of valves used can be minimized. The first switching valve 60 and the second switching valve 62 are not limited to three-way valves as long as they can exhibit the above-described function, and even if they are configured by a combination of two-way valves and four-way valves Good.

Subsequently, a cooling water circuit 2A which is a modification in which circuit elements are added to the cooling water circuit 2 will be described with reference to FIG. The cooling water circuit 2A is obtained by adding a ventilation heat exchanger 43 and a PTC heater 54 to the cooling water circuit 2.

The ventilation heat exchanger 43 is a heat exchanger for exchanging heat with the cooling water when ventilating the air in the vehicle compartment, and includes a flow path of air discharged from the vehicle compartment and a flow of cooling water. A road is formed. If the outside air temperature is high as in the summer season, the air cooled by the air conditioner is discharged, so the temperature of the cooling water can be lowered. If the outside air temperature is low as in winter, air heated by the air conditioner is discharged, so the temperature of the cooling water can be raised.

The ventilation heat exchanger 43 is provided in the second cooling water flow path 102 of the first circuit 10A. The ventilation heat exchanger 43 is disposed upstream of the inverter cooling unit 41. The cooling water cooled or heated by the ventilation heat exchanger 43 is supplied to the inverter cooling unit 41, so that the inverter can be cooled or warmed up.

The PTC heater 54 is provided in the fourth coolant channel 202 of the second circuit 20A. The PTC heater 54 is provided on the upstream side of the battery cooling unit 51. The cooling water heated by the PTC heater 54 is supplied to the battery cooling unit 51 and can contribute to the early warm-up of the battery.

In the cooling water circuit 2B shown in FIG. 7, a charger cooling portion 53 is provided which cools the battery charger instead of the PTC heater 54. The charger cooling unit 53 is provided in the fourth coolant channel 202 of the second circuit 20B. The charger cooling unit 53 is provided on the downstream side of the chiller 52. Therefore, the cooling water cooled by the chiller 52 is supplied to the charger cooling unit 53. Since the temperature of the cooling water determined in the battery cooling unit 51 is lower than the temperature of the cooling water determined in the charger cooling unit 53, the charger cooling unit 53 is disposed downstream of the battery cooling unit 51.

As described above, the cooling water circuits 2, 2A and 2B according to the present embodiment are controlled by the motor generator cooling unit 42 for cooling the motor generator, the inverter cooling unit 41 for cooling the inverter, and the ECU 3 which is an electronic control unit. A first pump 61 for circulating cooling water, a first circuit 10, 10A in which a first radiator 40 is connected to each other by a first cooling water channel 101 and a second cooling water channel 102, and a battery for cooling a battery A cooling unit 51, a chiller 52 that constitutes a part of a refrigeration circuit, a second pump 63 controlled by the ECU 3 to circulate cooling water, and a second radiator 50 are a third cooling water flow passage 201 and a fourth cooling water flow And a second circuit 20, 20A, 20B connected by a path 202.

In the cooling water circuits 2, 2A and 2B, a first connection portion 103 provided in a cooling water flow path connected to one outflow inlet / outlet side of the first radiator 40 and cooling connected to one outflow inlet / outlet side of the second radiator 50 A first connection channel 31 connecting the second connection section 203 provided in the water channel, and a third connection section 104 provided in the cooling water channel connected to the other outlet / inlet side of the first radiator 40; The second connection flow path 32 connecting the fourth connection portion 204 provided in the cooling water flow path connected to the other outlet / inlet side of the 2 radiator 50, and the third controlled by the ECU 3 to switch the flow of the cooling water A first switching valve 60 and a second switching valve 62, and a bypass channel 30 for circulating the cooling water to the battery and the chiller without passing through the second radiator 50 are provided.

Since the allowable water temperature which is the temperature for cooling the battery and the allowable water temperature which is the temperature for cooling the motor generator and the inverter are different from each other, the first circuit 10 and the second circuit 20 are provided. By disposing the second pump 63 and the second pump 63, it is possible to supply cooling water at a temperature suitable for each allowable water temperature. The first connection flow path 31 connects the first connection portion 103 and the second connection portion 203, and the second connection flow path 32 connects the third connection portion 104 and the fourth connection portion 204. By switching the first switching valve 60 and the second switching valve 62, for example, warm-up can be performed without turning the cooling water to the first radiator 40 and the second radiator 50 at low external temperature.

Furthermore, since the bypass flow passage 30 for circulating the cooling water to the battery cooling unit and the chiller without passing through the second radiator 50 is provided, for example, the second outside air temperature is higher than the allowable water temperature of the battery. Passing through the radiator 50 can prevent the temperature of the cooling water from rising, and the cooling water can be cooled only by the chiller. Thus, by using the first pump 61 and the second pump 63, and the first switching valve 60 and the second switching valve 62, the first circuit 10 and the second circuit 20 can be achieved with the minimum number of pumps and the number of valves. Can form various cooling water flows.

In the present embodiment, in the first circuit 10, the first switching valve 60 is further provided in the first connection portion 103 or the third connection portion 104, and in the second circuit 20, the second connection portion 203 or the fourth connection portion 203 is provided. The connection portion 204 is provided with a second switching valve 62.

By providing the first switching valve 60 and the second switching valve 62, the mode of circulating the cooling water can be changed according to the outside air temperature and the state of the battery. As described with reference to FIG. 3, the first switching valve 60 and the second switching valve 62 are switched so as not to allow the cooling water to flow to the first connection channel 31 and the second connection channel 32. The circulation of cooling water between the circuit 10 and the second circuit 20 can be made independent.

As described with reference to FIG. 4, warm-up can be performed by switching the first switching valve 60 and the second switching valve 62 so that the cooling water does not flow to the first radiator 40 and the second radiator 50. it can. As described with reference to FIG. 5, the first switching valve 60 is switched so that the cooling water does not flow to the motor generator cooling unit 42 and the inverter cooling unit 41, and the second switching valve 62 is switched to the second circuit 20 and the first By switching the flow of the cooling water to both sides of the circuit 10, the battery can be cooled using the first radiator 40, the second radiator 50, and the chiller 52, so that it is possible to cope with rapid charging.

When the second switching valve 62 is provided at the second connection portion 203, the bypass flow passage 30 has one end connected to the first connection flow passage 31, and the second flow passage 30 is a second one as shown in FIGS. 1 to 7. When the switching valve 62 is provided in the fourth connection portion 204, one end is connected to the second connection flow path 32. In the present embodiment, the second switching valve 62 is provided in the fourth connection portion 204, one end of the bypass flow passage 30 is connected to the second connection flow passage 32, and the other end is connected to the first connection flow passage 31. . However, this is an example of the connection mode, and if one end of the bypass flow passage 30 is connected to the second connection flow passage 32, the other end is connected to the fourth cooling water flow passage 202 near the second connection portion 203. It may be done.

By switching the second switching valve 62 so that the cooling water does not flow to the second radiator 50, the cooling water can be circulated to the battery cooling unit 51 and the chiller 52 through the bypass flow passage 30. Even if it does, the influence of the temperature rise by the 2nd radiator 50 is excluded, and cooling water can be cooled only with chiller 52.

In the present embodiment, the first circuit 10 further includes the first circuit on the side between the first connection portion 103 and the third connection portion 104 on which the motor generator cooling portion 42 and the inverter cooling portion 41 are disposed. The pump 61 is provided, and the second pump 20 is disposed between the second connection unit 203 and the fourth connection unit 204 and on the side where the battery cooling unit 51 and the chiller 52 are disposed. Is provided.

As shown in FIGS. 1 to 7, the first pump 61 is disposed in the direction of flowing the cooling water from the first connection portion 103 through the inverter cooling portion 41 and the motor generator cooling portion 42 to the third connection portion 104. In this case, the second pump 63 is disposed in the direction in which the cooling water flows from the fourth connection portion 204 through the battery cooling portion 51 and the chiller 52 to the second connection portion 203. On the other hand, in the case where the first pump 61 is disposed in the direction in which the cooling water flows from the third connection portion 104 through the inverter cooling portion 41 and the motor generator cooling portion 42 to the first connection portion 103, the second pump 63 are disposed in the direction in which the cooling water flows from the second connection portion 203 through the battery cooling portion 51 and the chiller 52 to the fourth connection portion 204.

As shown in FIG. 4, when the first switching valve 60 and the second switching valve 62 are switched not to flow the cooling water to the first radiator 40 and the second radiator 50, the motor generator cooling unit 42 and the inverter cooling unit 41, the second circuit 20 on the side where the battery cooling unit 51 and the chiller 52 are disposed, the first connection flow path 31, and the second connection flow path 32. Cooling water will flow to circulate. When switching is performed in this manner, circulation of the cooling water can be smoothly performed by setting the direction in which the first pump 61 and the second pump 63 flow the cooling water to be the same circulation direction.

In the present embodiment, the chiller 52 is disposed upstream of the battery cooling unit 51 in the second circuit 20. Since the battery is cooled using the cooling water cooled by the chiller 52, efficient cooling can be achieved by arranging the chiller 52 upstream of the battery cooling unit 51 to be cooled.

In the present embodiment, in the first circuit 10, the inverter cooling unit 41 is disposed upstream of the motor generator cooling unit 42. Since the heat tolerance is lower in the inverter, by disposing the inverter cooling unit 41 on the upstream side of the motor generator cooling unit 42, it is possible to supply cooling water with a low temperature to the inverter.

In the present embodiment, as shown in FIG. 6, in the second circuit 20A, the PTC heater 54, which is a heater for warm-up, is provided on the upstream side of the battery cooling unit 51. The battery cooling unit 51 can not only cool the battery but also apply heat to the battery when the battery warms up, so the PTC heater 54 is provided to supply heated cooling water to warm the battery. be able to.

In the present embodiment, as shown in FIG. 7, in the second circuit 20B, a charger cooling unit 53 for cooling the battery charger is provided on the downstream side of the chiller 52. By arranging in this way, the battery charger can also be cooled. The charger cooling unit 53 is preferably disposed downstream of the chiller 52 and further downstream than the battery cooling unit 51. This is because the allowable temperature of the battery is lower than that of the battery charger, and the reverse arrangement may cause an excessive temperature rise of the battery.

In the present embodiment, as shown in FIGS. 6 and 7, in the first circuit 10A, a ventilation heat exchanger 43 which exchanges heat with air discharged from the vehicle compartment is provided on the upstream side of the inverter cooling unit 41. There is. The ventilation heat exchanger can perform heat exchange between the cooling water and the air, which is discharged at around 25 ° C. discharged from the room especially in summer, so that the cooling water supplied to the inverter cooling unit 41 can be further cooled.

In the present embodiment, it is also preferable that the first circuit 10, 10C be provided with a flow shut valve which is controlled by the ECU 3 which is an electronic control unit, and which suppresses the flow of the cooling water. In the case where the cooling water is not desired to flow through the bypass flow path 30, the flow of the cooling water can be reliably suppressed.

By the way, in the cooling water circuit 2 of the first embodiment, the first switching valve 60 and the second switching valve 62 are controlled as shown in FIG. 2 at high external temperature, and the cooling water is circulated to the second radiator 50. I was trying to avoid it. This is the case where the allowable water temperature of the battery is low at about 30 ° C., and when the outside air temperature is high such as 35 ° C. to 40 ° C., the cooling water is the allowable water temperature when the cooling water is turned to the second radiator 50 This is to avoid getting higher than that. On the other hand, since the allowable water temperature of the inverter is generally about 60 ° C., heat exchange between the outside air and the cooling water is effective even at high outside air temperatures.

Therefore, in the cooling water circuit 2C of the second embodiment shown in FIG. 8, the cooling water of the first circuit 10A is circulated to the second radiator 50 when the outside air temperature is high. As shown in FIG. 8, the coolant circuit 2 </ b> C includes a first circuit 10 </ b> A and a second circuit 20. The first circuit 10A has already been described with reference to FIG. The second circuit 20 has already been described with reference to FIG.

The cooling water circuit 2C is provided with a third connection channel 71 and a fourth connection channel 72. The third connection flow path 71 is provided on the first connection portion 103 and the fifth connection portion 105 provided in the first cooling water flow path 101 on the first radiator 40 side, and the fourth connection portion 204 on the second radiator 50 side. And the sixth connection portion 206 provided in the third cooling water flow path 201.

The fourth connection flow path 72 is provided on the first cooling water flow path 101 closer to the first radiator 40 than the third connection portion 104, and the second connection side 203 than the second connection portion 203. And the eighth connection portion 205 provided in the third cooling water flow path 201.

Subsequently, the operation of the cooling water circuit 2C at high outside air temperature will be described with reference to FIG. The high outside air temperature is, for example, the case where the outside air temperature is higher than the air temperature of 35 ° C. and 30 ° C. which is the allowable water temperature of the battery.

As shown in FIG. 9, the first switching valve 60 is controlled to close the first connection channel 31 side and to circulate the cooling water in the first circuit 10. The second switching valve 62 closes the third coolant channel 201 side, and the coolant is controlled to circulate in the fourth coolant channel 202 and the second connection channel 32 side. Since the first switching valve 60 closes the first connection flow path 31 side, the cooling water flowing from the fourth cooling water flow path 202 into the first connection flow path 31 passes through the bypass flow path 30 to perform the second connection. It flows into the flow path 32 and returns to the fourth cooling water flow path 202.

By driving the first pump 61, the cooling water circulates in the first circuit 10. In the seventh connection portion 106, since the fourth connection flow path 72 is connected, the flow is divided into the cooling water circulating in the first circuit and the cooling water flowing to the fourth connection flow path 72.

The cooling water flowing through the fourth connection flow channel 72 flows from the eighth connection portion 205 into the third cooling water flow channel 201, and is heat-exchanged with the outside air in the second radiator 50. The cooling water heat-exchanged in the second radiator 50 flows from the sixth connection portion 206 into the third connection channel 71. The cooling water flowing through the third connection flow path 71 is returned to the first circuit from the fifth connection portion 105 and flows to the inverter cooling portion 41 and the motor generator cooling portion 42. Thus, the cooling water cooled by the first radiator 40 and the second radiator 50 can be supplied. Therefore, the inverter and motor generator can be cooled.

By driving the second pump 63, the cooling water is circulated from the fourth cooling water passage 202 of the second circuit 20 through the first connection passage 31, the bypass passage 30, and the second connection passage 32, and the battery The cooling water cooled by the chiller 52 can be supplied to the cooling unit 51. Thus, the battery can be cooled.

Subsequently, the operation of the cooling water circuit 2C at the middle and outer air temperatures will be described with reference to FIG. The middle and outer air temperature is, for example, the case where the air temperature is about 25 ° C. and the outside air temperature is lower than 30 ° C., which is the allowable water temperature of the battery.

As shown in FIG. 10, the first switching valve 60 is controlled to close the first connection channel 31 side and to circulate the cooling water in the first circuit 10. The second switching valve 62 closes the second connection flow path 32 side, and is controlled so that the cooling water circulates in the second circuit 20. Therefore, the cooling water does not flow in the first connection flow path 31 and the second connection flow path 32, and the cooling water does not flow in the bypass flow path 30.

By driving the first pump 61, the cooling water is circulated in the first circuit 10, and the cooling water cooled by the first radiator 40 can be supplied to the inverter cooling unit 41 and the motor generator cooling unit 42. Therefore, the inverter and motor generator can be cooled.

By driving the second pump 63, the cooling water is circulated in the second circuit 20, and the cooling water cooled by the second radiator 50 and the chiller 52 can be supplied to the battery cooling unit 51. Thus, the battery can be cooled. In some cases, the refrigeration circuit does not operate at the middle and outside air temperatures, and the cooled refrigerant may not be supplied to the chiller 52. In this case, the cooling water is cooled only by the second radiator 50.

Subsequently, the operation of the cooling water circuit 2C at low outside air temperature will be described with reference to FIG. The low outside air temperature is, for example, the case where the air temperature is about 5 ° C. and the battery and the inverter both require warm-up.

As shown in FIG. 11, the first switching valve 60 is controlled so as to close the first cooling water passage 101 side and to circulate the cooling water to the second cooling water passage 102 and the first connection passage 31 side. Ru. The second switching valve 62 closes the third coolant channel 201 side, and the coolant is controlled to circulate in the second connection channel 32 side.

By driving the first pump 61 and the second pump 63, the second cooling water flow path 102 of the first circuit 10 passes through the second connection flow path 32, and the fourth cooling water flow path 202 of the second circuit 20 receives the first The cooling water flows back to the first circuit 10 through the connection flow path 31 again. Therefore, the heat generated by all the devices can be used to warm up. After the completion of the warm-up, since the cooling water becomes high temperature, the heat can be transferred to the refrigerant in the chiller 52, and the heat can be used for heating the air conditioner.

Subsequently, the operation of the cooling water circuit 2 at the time of rapid charge of the battery will be described with reference to FIG. Since the battery rapidly generates heat when the battery is rapidly charged, all the elements of the coolant circuit 2 are utilized to cool the battery.

As shown in FIG. 12, the first switching valve 60 is controlled to close the first connection channel 31 side. The second switching valve 62 is controlled to close the second connection channel 32 side.

By driving the second pump 63, the cooling water flowing through the fourth cooling water flow passage 202 is branched to the third cooling water flow passage 201 side and the fourth connecting flow passage 72 side in the eighth connection portion 205. The cooling water that has flowed to the fourth connection flow channel 72 flows to the first cooling water flow channel 101, is heat-exchanged in the first radiator 40, and the temperature drops. The cooling water cooled in the first radiator 40 flows from the fifth connection portion 105 to the third connection flow path 71, and is returned to the fourth cooling water flow path 202 from the sixth connection portion 206. The coolant that has flowed from the eighth connection portion 205 to the third coolant channel 201 is subjected to heat exchange in the second radiator 50 to lower its temperature, and is returned to the fourth coolant channel 202. The cooling water returned to the fourth cooling water flow path 202 is further cooled in the chiller 52 and supplied to the battery cooling unit 51.

In the present embodiment, at least one of the third connection flow path 71 and the fourth connection flow path 72 is also provided with a flow shut valve which is controlled by the electronic control unit ECU 3 and suppresses the flow of cooling water. preferable. In the case where the cooling water is not desired to flow through the third connection flow channel 71 and the fourth connection flow channel 72, the flow of the cooling water can be reliably suppressed.

The cooling water circuit 2D of the third embodiment constitutes a cooling system mounted on an electric vehicle. As shown in FIG. 13, the cooling water circuit 2D includes a first circuit 10D, a second circuit 20D, and an ECU 3 which is an electronic control unit. In the first circuit 10D, a circuit in which cooling water circulates is formed by the first cooling water flow passage 101 and the second cooling water flow passage 102. The first coolant channel 101 and the second coolant channel 102 are connected by the first connecting portion 103 and the third connecting portion 104.

The first coolant flow path 101 is provided with a first radiator 40 and a first pump 61 controlled by the ECU 3. The first radiator 40 is a heat exchanger that exchanges heat between the cooling water passing through the first cooling water flow passage 101 and the outside air.

The first pump 61 is a pump that generates a flow of cooling water flowing to the first radiator 40. In the case of the present embodiment, the first pump 61 is disposed in the direction in which the cooling water flows from the first connection portion 103 to the third connection portion 104 through the first radiator 40.

An inverter cooling unit 41 and a motor generator cooling unit 42 are provided in the second cooling water flow path 102. The inverter cooling unit 41 is a part that cools the inverter. The inverter converts direct current supplied from the battery into alternating current and supplies it to the motor generator. The motor generator cooling unit 42 is a part that cools the motor generator. The motor generator is a rotary motor having a function of generating driving force and a function of generating electric power. The allowable water temperature of the cooling water circuit for cooling the inverter and the motor generator is generally about 60.degree.

In the second circuit 20D, a circuit in which the cooling water circulates is formed by the third cooling water flow path 201 and the fourth cooling water flow path 202. The third cooling water channel 201 and the fourth cooling water channel 202 are connected by the second connection portion 203 and the fourth connection portion 204. The fourth connection portion 204 is provided with a first switching valve 60 controlled by the ECU 3.

A second radiator 50 is provided in the third coolant channel 201. The second radiator 50 is a heat exchanger that exchanges heat between the cooling water passing through the third cooling water passage 201 and the outside air.

In the fourth coolant channel 202, a battery cooling unit 51, a chiller 52, and a second pump 63 controlled by the ECU 3 are provided. The battery cooling unit 51 is a part that cools the battery. The battery is a power supply for driving and supplies power to the inverter. The allowable water temperature of the cooling water circuit for cooling the battery is generally about 30 ° C. or so.

The chiller 52 constitutes a part of the refrigeration circuit, and is a water refrigerant heat exchanger that exchanges heat between the refrigerant flowing in the refrigeration circuit and the cooling water flowing in the second circuit 20.

The second pump 63 is a pump that generates a flow of cooling water that flows to the battery cooling unit 51 and the chiller 52. In the case of the present embodiment, the second pump 63 is disposed in the direction in which the cooling water flows from the second connection portion 203 through the chiller 52 and the battery cooling portion 51 to the fourth connection portion 204.

A bypass flow passage 30 connecting the fifth connection portion 205 and the sixth connection portion 206 provided in the cooling water flow passage of the second circuit 20 so as to circulate the cooling water to the battery and the chiller without passing through the second radiator 50. Is provided. The fifth connection portion 205 and the sixth connection portion 206 are provided in the fourth coolant channel 202. The fifth connection portion 205 is provided with a second switching valve 62 controlled by the ECU 3.

The first circuit 10D and the second circuit 20D are connected by the first connection channel 31 and the second connection channel 32. The first connection flow passage 31 is a cooling water flow passage connected to one outflow / inlet side of the first radiator 40 and a cooling water flow passage connected to one outflow / inlet side of the second radiator 50. 2 connecting with the connection unit 203. The second connection passage 32 is a third connection portion 104 which is a cooling water passage connected to the other outlet / inlet side of the first radiator 40 and a cooling water passage connected to the other outlet / inlet side of the second radiator 50 4 connection portion 204 is connected.

Subsequently, the operation of the cooling water circuit 2D at high outside air temperature will be described with reference to FIG. The high outside air temperature is, for example, the case where the outside air temperature is higher than the air temperature of 35 ° C. and 30 ° C. which is the allowable water temperature of the battery.

As shown in FIG. 14, the first switching valve 60 closes the side of the fourth cooling water passage 202 in which the battery cooling unit 51 and the chiller 52 are disposed. The second switching valve 62 closes the third coolant channel 201 side, and is controlled so that the coolant is circulated to the fourth coolant channel 202 and the bypass channel 30 side. Since the first switching valve 60 closes the fourth coolant channel 202 side, the coolant flowing into the fourth coolant channel 202 is returned to the fourth coolant channel 202 through the bypass channel 30.

On the other hand, the cooling water having flowed through the first cooling water flow passage 101 is divided into the second cooling water flow passage 102 side and the second connection flow passage 32 side in the third connection portion 104. Since the first switching valve 60 closes the fourth coolant channel 202 side, the coolant flowing into the second connection channel 32 flows through the third coolant channel 201 of the second circuit, and the first connection flow It flows to the passage 31 and returns to the first cooling water passage 101. The coolant that has flowed into the second coolant channel 102 is returned to the first coolant channel 101.

By driving the first pump 61, the cooling water is circulated in the third cooling water flow path 201 of the first circuit 10D and the second circuit 20D, and the inverter cooling unit 41 and the motor generator cooling unit 42 2 Cooling water cooled by the radiator 50 can be supplied. Therefore, the inverter and motor generator can be cooled.

By driving the second pump 63, the cooling water is circulated from the fourth cooling water flow passage 202 of the second circuit 20 through the bypass flow passage 30, and the cooling water cooled by the chiller 52 is supplied to the battery cooling unit 51. be able to. Thus, the battery can be cooled.

Subsequently, the operation of the cooling water circuit 2 at middle and outer air temperatures will be described with reference to FIG. The middle and outer air temperature is, for example, the case where the air temperature is about 25 ° C. and the outside air temperature is lower than 30 ° C., which is the allowable water temperature of the battery.

As shown in FIG. 15, the first switching valve 60 closes the second connection flow path 32 side, and is controlled so that the cooling water circulates in the first circuit 10D. The second switching valve 62 closes the bypass flow passage 30 side, and the cooling water is controlled to circulate in the second circuit 20D excluding the bypass flow passage 30. Therefore, the cooling water does not flow in the first connection flow path 31 and the second connection flow path 32, and the cooling water does not flow in the bypass flow path 30.

By driving the first pump 61, the cooling water is circulated in the first circuit 10D, and the cooling water cooled by the first radiator 40 can be supplied to the inverter cooling unit 41 and the motor generator cooling unit 42. Therefore, the inverter and motor generator can be cooled.

By driving the second pump 63, the cooling water is circulated in the second circuit 20D, and the cooling water cooled by the second radiator 50 and the chiller 52 can be supplied to the battery cooling unit 51. Thus, the battery can be cooled. In some cases, the refrigeration circuit does not operate at the middle and outside air temperatures, and the cooled refrigerant may not be supplied to the chiller 52. In this case, the cooling water is cooled only by the second radiator 50.

Subsequently, the operation of the cooling water circuit 2D at low outside air temperature will be described with reference to FIG. The low outside air temperature is, for example, the case where the air temperature is about 5 ° C. and the battery and the motor generator also need to be warmed up.

As shown in FIG. 16, the first switching valve 60 is controlled so as to close the third cooling water flow passage 201 side and to circulate the cooling water to the fourth cooling water flow passage 202 and the second connection flow passage 32 side. Ru. The first pump 61 is controlled so that the output thereof is reduced or stopped so that the first coolant passage 101 is closed and the coolant is circulated to the second coolant passage 102 side. The second switching valve 62 closes the bypass flow passage 30 side, and is controlled so that the cooling water circulates to the fourth cooling water flow passage 202 side. Moreover, in order to reliably avoid the inflow to the first cooling water flow path 101 side, it is also preferable that a flow shut valve controlled by the ECU 3 is provided on the path of the first cooling water flow path 101.

By driving the second pump 63, the second cooling water flow path 102 of the first circuit 10D passes from the second cooling water flow path 102 to the first connection flow path 31, and the fourth cooling water flow path 202 of the second circuit 20D is The cooling water flows back to the first circuit 10D through it again. Therefore, the heat generated by all the devices can be used to warm up. After the completion of the warm-up, since the cooling water becomes high temperature, the heat can be transferred to the refrigerant in the chiller 52, and the heat can be used for heating the air conditioner.

When switching from the high outside air temperature shown in FIG. 14 to the inside / outside air temperature shown in FIG. 15, the first switching valve 60 is switched and then the second switching valve 62 is switched, and then the chiller 52 is stopped. Since the first switching valve 60 and the second switching valve 62 are switched to confirm that the second radiator 50 is cooled, the chiller 52 is stopped, so that the battery can be reliably cooled.

When switching from the inside / outside air temperature shown in FIG. 15 to the high outside air temperature shown in FIG. 14, the first switching valve 60 is switched after the chiller 52 is driven and then the second switching valve 62 is switched. Since the first switching valve 60 and the second switching valve 62 are switched after driving the chiller 52, cooling of the battery by the chiller 52 can be reliably performed.

When switching from the inside to outside air temperature shown in FIG. 15 to the low outside air temperature shown in FIG. 16, the chiller 52 is driven after the output of the first pump 61 is reduced or stopped after the first switching valve 60 is switched. Since the output of the first pump 61 is reduced or stopped after switching the first switching valve 60, cooling of the inverter and the motor generator can be ensured.

When switching from the low outside air temperature shown in FIG. 16 to the inside / outside air temperature shown in FIG. 15, the chiller 52 is stopped after switching the first switching valve 60 after raising the output of the first pump 61 or starting driving. Do. Since the chiller 52 is stopped after switching, battery cooling can be ensured.

Subsequently, the operation of the cooling water circuit 2D at the time of rapid charge of the battery will be described with reference to FIG.

As shown in FIG. 17, the first switching valve 60 closes the second connection flow path 32 side, and is controlled so that the cooling water flows in the second circuit 20D. The second switching valve 62 is controlled to close the bypass flow passage 30.

By driving the second pump 63, the cooling water circulates through the third cooling water passage 201 and the fourth cooling water passage 202 in the second circuit 20D. The coolant that has flowed to the third coolant channel 201 is subjected to heat exchange in the second radiator 50 to lower its temperature, and then flows to the fourth coolant channel 202. The cooling water having flowed into the fourth cooling water flow path 202 is further cooled in the chiller 52 and supplied to the battery cooling unit 51.

Subsequently, a cooling water circuit 2E which is a modification in which circuit elements are added to the cooling water circuit 2D will be described with reference to FIG. The cooling water circuit 2E is obtained by adding a charger cooling unit 53 for cooling the battery charger to the cooling water circuit 2D.

The charger cooling unit 53 is provided in the fourth coolant passage 202 of the second circuit 20E. The charger cooling unit 53 is provided on the downstream side of the chiller 52. Therefore, the cooling water cooled by the chiller 52 is supplied to the charger cooling unit 53. Since the temperature of the cooling water determined in the battery cooling unit 51 is lower than the temperature of the cooling water determined in the charger cooling unit 53, the charger cooling unit 53 is disposed downstream of the battery cooling unit 51.

As shown in FIG. 19, when the flow of cooling water at the time of battery quick charge similar to that of FIG. 17 is formed, the cooling water can be supplied to the charger cooling unit 53 as well.

Subsequently, a cooling water circuit 2F in which the PTC heater 54 is added to the cooling water circuit 2D will be described with reference to FIG.

The PTC heater 54 is provided in the fourth coolant channel 202 of the second circuit 20F. The PTC heater 54 is provided on the upstream side of the battery cooling unit 51. The cooling water heated by the PTC heater 54 is supplied to the battery cooling unit 51 and can contribute to the early warm-up of the battery.

As shown in FIG. 21, if the flow of cooling water at low ambient temperature similar to that of FIG. 16 is formed, the battery can be warmed up by the waste heat of the inverter and motor generator and the heating of the PTC heater 54. .

Subsequently, a cooling water circuit 2G in which the ventilation heat exchanger 43 is added to the cooling water circuit 2D will be described with reference to FIG.

The ventilation heat exchanger 43 is a heat exchanger for exchanging heat with the cooling water when ventilating the air in the vehicle compartment, and includes a flow path of air discharged from the vehicle compartment and a flow of cooling water. A road is formed. If the outside air temperature is high as in the summer season, the air cooled by the air conditioner is discharged, so the temperature of the cooling water can be lowered. If the outside air temperature is low as in winter, air heated by the air conditioner is discharged, so the temperature of the cooling water can be raised.

The ventilation heat exchanger 43 is provided in the second cooling water flow path 102 of the first circuit 10G. The ventilation heat exchanger 43 is disposed upstream of the inverter cooling unit 41. The cooling water cooled or heated by the ventilation heat exchanger 43 is supplied to the inverter cooling unit 41 and the motor generator cooling unit 42 so that the inverter and the motor generator can be cooled or warmed up.

As shown in FIG. 23, when the flow of cooling water at the high outside air temperature similar to FIG. 14 is formed, the cooling water cooled by the ventilation heat exchanger 43 is supplied to the inverter cooling unit 41 and the motor generator cooling unit 42. can do. As shown in FIG. 24, when the flow of cooling water at low ambient temperature similar to FIG. 16 is formed, the cooling water heated by the ventilation heat exchanger 43 is sent to the inverter cooling unit 41 and the motor generator cooling unit 42. Can be supplied.

As described above, the cooling water circuits 2D, 2E, 2F, and 2G according to the present embodiment include the motor generator cooling unit 42 for cooling the motor generator, the inverter cooling unit 41 for cooling the inverter, and the ECU 3 which is an electronic control unit. A first pump 61 for controlling and circulating cooling water, and first circuits 10D and 10G in which a first radiator 40 is connected to each other by a first cooling water channel 101 and a second cooling water channel 102, and a battery are cooled Battery cooling unit 51, a chiller 52 that forms part of a refrigeration circuit, a second pump 63 that is controlled by the ECU 3 and that circulates the cooling water, and a second radiator 50 are the third cooling water flow path 201 and the fourth The second circuits 20D, 20E, and 20F connected by the cooling water flow path 202 are provided. In the cooling water circuits 2D, 2E, 2F, 2G, the first connection portion 103 provided in the cooling water flow path connected to the one outlet / inlet side of the first radiator 40 and the one outlet / inlet side of the second radiator 50 A first connection flow path 31 connecting the second connection portion 203 provided in the cooling water flow path connected, and a third connection portion 104 provided in the cooling water flow path connected to the other outlet / inlet side of the first radiator 40 , And a second connection flow path 32 connecting the fourth connection portion 204 provided in the cooling water flow path connected to the other outflow / inlet side of the second radiator 50, and the battery and chiller without passing through the second radiator 50 In order to switch the flow of the cooling water, a bypass flow path 30 connecting the fifth connection portion 205 and the sixth connection portion 206 provided in the cooling water flow path of the second circuits 20D, 20E, and 20F so as to circulate water. To the ECU 3 A first switching valve 60 and the second switching valve 62 to be controlled, is provided Ri.

The first circuit 10D, 10G and the second circuit 20D, 20E, 20F are provided because the allowable water temperature which is the temperature for cooling the battery is different from the allowable water temperature which is the temperature for cooling the motor generator and the inverter. By arranging the first pump 61 and the second pump 63, respectively, it is possible to supply cooling water at a temperature suitable for the respective allowable water temperature. The first connection flow path 31 connects the first connection portion 103 and the second connection portion 203, and the second connection flow path 32 connects the third connection portion 104 and the fourth connection portion 204. By switching the first switching valve 60 and the second switching valve 62, for example, warm-up can be performed without turning the cooling water to the first radiator 40 and the second radiator 50 at low external temperature. Furthermore, since the bypass flow passage 30 for circulating the cooling water to the battery cooling unit and the chiller without passing through the second radiator 50 is provided, for example, the second outside air temperature is higher than the allowable water temperature of the battery. Passing through the radiator 50 can prevent the temperature of the cooling water from rising, and the cooling water can be cooled only by the chiller. At this time, since the bypass flow passage 30 is provided in the second circuit 20, the cooling water passing through the second radiator 50 from the first connection flow passage 31 or the second connection flow passage 32 is made to the first circuit side. Can be supplied. Thus, by using the first pump 61 and the second pump 63, and the first switching valve 60 and the second switching valve 62, the first circuit 10 and the second circuit 20 can be achieved with the minimum number of pumps and the number of valves. Can form various cooling water flows.

In the present embodiment, the first switching valve 60 is further provided in the second connection portion 203 or the fourth connection portion 204, and the second switching valve 62 is provided in the fifth connection portion 205 or the sixth connection portion 206. . In the present embodiment, in the first circuits 10D and 10G, the first pump 61 is provided between the first connection portion 103 and the third connection portion 104 on the side where the first radiator 40 is disposed. In the second circuits 20D, 20E, and 20F, the second pump 63 is disposed between the second connection unit 203 and the fourth connection unit 204 and on the side where the battery cooling unit 51 and the chiller 52 are disposed. Is provided.

By providing the first switching valve 60 and the second switching valve 62, the mode of circulating the cooling water can be changed according to the outside air temperature and the state of the battery. As described with reference to FIG. 14, the first switching valve 60 closes the fourth cooling water channel side where the battery cooling unit 51 and the chiller 52 are disposed, and the second switching valve 62 is the second radiator 50. Block the side of the third cooling water flow passage where the cooling water is disposed, so that the cooling water does not flow to the second radiator 50 in the second circuit 20D, and the second radiator 50 passes through the first circuit 10D side. It can be compatible with supplying cooling water.

As described with reference to FIG. 15, the cooling water is not allowed to flow in the first connection flow path 31, the second connection flow path 32, and the bypass flow path 30 in the first switching valve 60 and the second switching valve 62. By switching, the circulation of the cooling water of the first circuit 10D and the second circuit 20D can be made independent.

As described with reference to FIG. 16, warm-up can be performed by switching the first switching valve 60 and the second switching valve 62 so that the cooling water does not flow to the first radiator 40 and the second radiator 50. it can.

As described with reference to FIG. 17, the first switching valve 60 is switched so as not to allow the coolant to flow to the motor generator cooling unit 42 and the inverter cooling unit 41, and the second switching valve 62 is switched to the bypass flow passage 30. The second radiator 50 and the chiller 52 can be used to cool the battery by switching so that the battery does not flow, so it is possible to cope with rapid charging.

In the present embodiment, each of the first switching valve 60 and the second switching valve 62 is preferably configured by a three-way valve. By configuring the first switching valve 60 and the second switching valve 62 with three-way valves, the number of valves used can be minimized. The first switching valve 60 and the second switching valve 62 are not limited to three-way valves as long as they can exhibit the above-described function, and even if they are configured by a combination of two-way valves and four-way valves Good.

In the present embodiment, the chiller 52 is disposed upstream of the battery cooling unit 51 in the second circuits 20D, 20E, and 20F. Since the battery is cooled using the cooling water cooled by the chiller 52, efficient cooling can be achieved by arranging the chiller 52 upstream of the battery cooling unit 51 to be cooled.

In the present embodiment, in the first circuits 10D and 10G, the inverter cooling unit 41 is disposed upstream of the motor generator cooling unit 42. Since the heat tolerance is lower in the inverter, by disposing the inverter cooling unit 41 on the upstream side of the motor generator cooling unit 42, it is possible to supply cooling water with a low temperature to the inverter.

In the present embodiment, as shown in FIGS. 20 and 21, in the second circuit 20F, the PTC heater 54, which is a heater for warm-up, is provided on the upstream side of the battery cooling unit 51. The battery cooling unit 51 can not only cool the battery but also apply heat to the battery when the battery warms up, so the PTC heater 54 is provided to supply heated cooling water to warm the battery. be able to.

In the present embodiment, as shown in FIGS. 18 and 19, in the second circuit 20E, a charger cooling unit 53 for cooling the battery charger is provided on the downstream side of the chiller 52. By arranging in this way, the battery charger can also be cooled. The charger cooling unit 53 is preferably disposed downstream of the chiller 52 and further downstream than the battery cooling unit 51. This is because the allowable temperature of the battery is lower than that of the battery charger, and the reverse arrangement may cause an excessive temperature rise of the battery.

In the present embodiment, as shown in FIGS. 22, 23 and 24, in the first circuit 10 G, a ventilation heat exchanger 43 that exchanges heat with air discharged from the vehicle compartment is provided on the upstream side of the inverter cooling unit 41. ing. The ventilation heat exchanger can perform heat exchange between the cooling water and the air, which is discharged at around 25 ° C. discharged from the room especially in summer, so that the cooling water supplied to the inverter cooling unit 41 can be further cooled.

In the present embodiment, in the first circuits 10D and 10G, in the first cooling water flow path 101, which is the side on which the first radiator 40 is disposed, between the first connection portion 103 and the third connection portion 104. It is also preferable that a flow shut valve which is controlled by the ECU 3 which is an electronic control unit and which suppresses the flow of the cooling water is provided. In the case where the cooling water is not desired to flow to the first radiator 40, the flow of the cooling water can be reliably suppressed.

The cooling water circuit 2H of the fourth embodiment constitutes a cooling system mounted on an electric vehicle. As shown in FIG. 25, the cooling water circuit 2H includes a first circuit 10H, a second circuit 20H, and an ECU 3 which is an electronic control unit. In the first circuit 10H, a circuit in which cooling water is circulated is formed by the first cooling water flow passage 101, the second cooling water flow passage 102, and the third cooling water flow passage 201. The first cooling water flow passage 101 and the second cooling water flow passage 102 are connected by the first connection portion 103 and the second connection portion 104. The first connection portion 103 is provided with a first pump 61.

The first coolant flow path 101 is provided with a first radiator 40 and a first pump 61 controlled by the ECU 3. The first radiator 40 is a heat exchanger that exchanges heat between the cooling water passing through the first cooling water flow passage 101 and the outside air.

The first pump 61 is a pump that generates a flow of cooling water flowing to the first radiator 40 and the second radiator 50. In the case of the present embodiment, the first pump 61 is a direction in which the cooling water flows from the first connection portion 103 to the second connection portion 104 through the first radiator 40, and from the first connection portion 103 to the second radiator 50. Are disposed in the direction in which the cooling water flows to the third connection portion 106.

An inverter cooling unit 41 and a motor generator cooling unit 42 are provided in the second cooling water flow path 102. The inverter cooling unit 41 is a part that cools the inverter. The inverter converts direct current supplied from the battery into alternating current and supplies it to the motor generator. The motor generator cooling unit 42 is a part that cools the motor generator. The motor generator is a rotary motor having a function of generating driving force and a function of generating electric power. The allowable water temperature of the cooling water circuit for cooling the inverter and the motor generator is generally about 60.degree.

A second radiator 50 is provided in the third coolant channel 201. The second radiator 50 is a heat exchanger that exchanges heat between the cooling water passing through the third cooling water passage 201 and the outside air. One end of the third coolant channel 201 is connected to the first coolant channel 101 including the first radiator 40, and the other end is connected to the third connector 106.

In the second circuit 20H, a circuit in which cooling water circulates is formed by the bypass flow passage 30 and the fourth cooling water flow passage 202. The bypass flow passage 30 and the fourth cooling water flow passage 202 are connected by the fourth connection portion 203 and the fifth connection portion 204. The fourth connection portion 203 is provided with a second switching valve 62 controlled by the ECU 3.

The bypass flow path 30 is for circulating the cooling water to the battery and the chiller without passing through the first radiator 40 and the second radiator 50.

In the fourth coolant channel 202, a battery cooling unit 51, a chiller 52, and a second pump 63 controlled by the ECU 3 are provided. The battery cooling unit 51 is a part that cools the battery. The battery is a power supply for driving and supplies power to the inverter. The allowable water temperature of the cooling water circuit for cooling the battery is generally about 30 ° C. or so.

The chiller 52 constitutes a part of the refrigeration circuit, and is a water refrigerant heat exchanger that exchanges heat between the refrigerant flowing in the refrigeration circuit and the cooling water flowing in the second circuit 20.

The second pump 63 is a pump that generates a flow of cooling water that flows to the battery cooling unit 51 and the chiller 52. In the case of the present embodiment, the second pump 63 is disposed in a direction in which the cooling water flows from the fifth connection portion 204 through the chiller 52 and the battery cooling portion 51 to the fourth connection portion 203.

The first circuit 10H and the second circuit 20H are connected by the first connection channel 31 and the second connection channel 32. The first connection flow path 31 connects the first connection portion 103 and the fourth connection portion 203. The second connection flow path 32 connects the third connection portion 106 provided on the way of the third cooling water flow path 201 from the second radiator 50 to the second connection portion 104 and the fifth connection portion 204.

Subsequently, the operation of the cooling water circuit 2H at high outside air temperature will be described with reference to FIG. The high outside air temperature is, for example, the case where the outside air temperature is higher than the air temperature of 35 ° C. and 30 ° C. which is the allowable water temperature of the battery.

As shown in FIG. 26, the first switching valve 60 opens the first cooling water passage 101 side and the second cooling water passage 102 side. The second switching valve 62 closes the first connection flow path 31 side, and is controlled so that the cooling water circulates to the bypass flow path 30 and the fourth cooling water flow path 202 side.

On the other hand, the cooling water having flowed through the first cooling water flow path 101 flows through the first radiator 40, and is divided into one flowing directly through the first cooling water flow path 101 and one dividing into the third cooling water flow path 201. The coolant that has flowed to the third coolant channel 201 is cooled by the second radiator 50. The cooling water having flowed through the first cooling water flow passage 101 and the cooling water having flowed through the third cooling water flow passage 201 join at the second connection portion 104 and flow into the second cooling water flow passage 102.

The cooling water is circulated in the first circuit 10 by driving the first pump 61, and the cooling water cooled by the first radiator 40 and the second radiator 50 is supplied to the inverter cooling unit 41 and the motor generator cooling unit 42. Can. Therefore, the inverter and motor generator can be cooled.

By driving the second pump 63, the cooling water can be circulated in the second circuit 20, and the cooling water cooled by the chiller 52 can be supplied to the battery cooling unit 51. Thus, the battery can be cooled.

Subsequently, the H operation of the cooling water circuit 2 at middle and outer air temperatures will be described with reference to FIG. The middle and outer air temperature is, for example, the case where the air temperature is about 25 ° C. and the outside air temperature is lower than 30 ° C., which is the allowable water temperature of the battery.

As shown in FIG. 27, the first switching valve 60 opens the first cooling water channel 101, the second cooling water channel 102, and the first connection channel 31, which are all the channels. The second switching valve 62 closes the bypass flow passage 30 side.

By driving the first pump 61 and the second pump 63, the cooling water circulates through the first circuit 10H and the fourth cooling water passage 202. The cooling water cooled by the first radiator 40 and the second radiator 50 can be supplied to the inverter cooling unit 41 and the motor generator cooling unit 42. Therefore, the inverter and motor generator can be cooled.

The cooling water cooled by the first radiator 40, the second radiator 50, and the chiller 52 can be supplied to the battery cooling unit 51. Thus, the battery can be cooled. In some cases, the refrigeration circuit does not operate at the middle and outside air temperatures, and the cooled refrigerant may not be supplied to the chiller 52. In this case, the cooling water is cooled only by the first radiator 40 and the second radiator 50.

Subsequently, the operation of the cooling water circuit 2H at low outside air temperature will be described with reference to FIG. The low outside air temperature is, for example, the case where the air temperature is about 5 ° C. and the battery and the motor generator also need to be warmed up.

As shown in FIG. 28, the first switching valve 60 is controlled to close the first cooling water flow passage 101 side and to circulate the cooling water to the second cooling water flow passage 102 and the first connection flow passage 31 side. Ru. The second switching valve 62 closes the bypass flow passage 30 side, and is controlled so that the cooling water circulates to the fourth cooling water flow passage 202 side.

By driving the second pump 63, the fourth cooling water flow of the second circuit 20H passes from the second cooling water flow channel 102 of the first circuit 10H to a part of the third cooling water flow channel 201 and the second connection flow channel 32. The cooling water flows from the passage 202 through the first connection flow passage 31 back to the first circuit 10 again. Therefore, the heat generated by all the devices can be used to warm up. After the completion of the warm-up, since the cooling water becomes high temperature, the heat can be transferred to the refrigerant in the chiller 52, and the heat can be used for heating the air conditioner.

When switching from the high outside air temperature shown in FIG. 26 to the inside / outside air temperature shown in FIG. 27, the second switching valve 62 is switched and then the chiller 52 is stopped. Since the chiller 52 is stopped after switching the second switching valve 62 and confirming that the coolant flows to the first radiator 40 and the second radiator 50, the battery can be reliably cooled.

When switching from the inside / outside air temperature shown in FIG. 27 to the high outside air temperature shown in FIG. 26, the second switching valve 62 is switched after the chiller 52 is driven. Since the second switching valve 62 is switched after driving the chiller 52, cooling of the battery by the chiller 52 can be reliably performed.

When switching from the inside to outside air temperature shown in FIG. 27 to the low outside air temperature shown in FIG. 28, the output of the first pump 61 is reduced or stopped, and then the first switching valve 60 is switched to drive the chiller 52. . When switching from the low outside air temperature shown in FIG. 28 to the inside / outside air temperature shown in FIG. 27, the first switching valve 60 is switched and then the output of the first pump 61 is increased or the chiller 52 is stopped. Do.

Subsequently, the operation of the cooling water circuit 2H at the time of quick charge of the battery will be described with reference to FIG.

As shown in FIG. 29, the first switching valve 60 is controlled to close the second cooling water flow path 102 side. The second switching valve 62 is controlled to close the bypass flow passage 30.

By driving the second pump 63, the cooling water flows through the fourth cooling water flow path 202 in the second circuit 20H, and flows from the first connection flow path 31 to the first cooling water flow path 101 and the third cooling water flow path 201. . The cooling water which has flowed to the first cooling water flow passage 101 and the third cooling water flow passage 201 is subjected to heat exchange in the first radiator 40 and the second radiator 50 so that the temperature is lowered and flows to the fourth cooling water flow passage 202. The cooling water having flowed into the fourth cooling water flow path 202 is further cooled in the chiller 52 and supplied to the battery cooling unit 51.

Subsequently, a cooling water circuit 2J which is a modified example in which circuit elements are added to the cooling water circuit 2H will be described with reference to FIG. The cooling water circuit 2J is obtained by adding a charger cooling portion 53 for cooling the battery charger to the cooling water circuit 2H.

The charger cooling unit 53 is provided in the fourth coolant passage 202 of the second circuit 20J. The charger cooling unit 53 is provided on the downstream side of the chiller 52. Therefore, the cooling water cooled by the chiller 52 is supplied to the charger cooling unit 53. Since the temperature of the cooling water determined in the battery cooling unit 51 is lower than the temperature of the cooling water determined in the charger cooling unit 53, the charger cooling unit 53 is disposed downstream of the battery cooling unit 51.

As shown in FIG. 31, when the flow of cooling water at the time of battery quick charge similar to that of FIG. 29 is formed, the cooling water can also be supplied to the charger cooling unit 53.

Subsequently, a cooling water circuit 2K in which the PTC heater 54 is added to the cooling water circuit 2H will be described with reference to FIG.

The PTC heater 54 is provided in the fourth coolant channel 202 of the second circuit 20K. The PTC heater 54 is provided on the upstream side of the battery cooling unit 51. The cooling water heated by the PTC heater 54 is supplied to the battery cooling unit 51 and can contribute to the early warm-up of the battery.

As shown in FIG. 33, if the flow of cooling water at low ambient temperature similar to that of FIG. 28 is formed, the battery can be warmed up by the waste heat of the inverter and motor generator and the heating of the PTC heater 54. .

Subsequently, a cooling water circuit 2L in which the ventilation heat exchanger 43 is added to the cooling water circuit 2H will be described with reference to FIG.

The ventilation heat exchanger 43 is a heat exchanger for exchanging heat with the cooling water when ventilating the air in the vehicle compartment, and includes a flow path of air discharged from the vehicle compartment and a flow of cooling water. A road is formed. If the outside air temperature is high as in the summer season, the air cooled by the air conditioner is discharged, so the temperature of the cooling water can be lowered. If the outside air temperature is low as in winter, air heated by the air conditioner is discharged, so the temperature of the cooling water can be raised.

The ventilation heat exchanger 43 is provided in the second cooling water flow path 102 of the first circuit 10L. The ventilation heat exchanger 43 is disposed upstream of the inverter cooling unit 41. The cooling water cooled or heated by the ventilation heat exchanger 43 is supplied to the inverter cooling unit 41 and the motor generator cooling unit 42 so that the inverter and the motor generator can be cooled or warmed up.

As shown in FIG. 35, when the flow of cooling water at the high outside air temperature similar to FIG. 26 is formed, the cooling water cooled by the ventilation heat exchanger 43 is supplied to the inverter cooling unit 41 and the motor generator cooling unit 42. can do. As shown in FIG. 36, when the same flow of cooling water at a low outside air temperature as in FIG. 28 is formed, the cooling water heated by the ventilation heat exchanger 43 can be supplied to the battery cooling unit 51.

The third coolant passage 201 provided with the second radiator 50 can be connected to the coolant inlet side of the first radiator 40. At that time, as shown in FIG. 37, the throttle 44 can be provided on the downstream side of the first radiator 40 in the first coolant channel 101. The throttle 44 can adjust the flow rate of the cooling water flowing into the first radiator 40 and the flow rate of the cooling water flowing into the second radiator 50. The throttle 44 may be provided separately from the first radiator 40 as shown in FIG. 37, or the first radiator 40 may be provided with a similar throttle structure. As described above, the throttling structure can be separately or integrally provided on the side where the cooling water flows out from the first radiator 40.

As shown in FIG. 38, the third coolant channel 201M provided with the second radiator 50 can be connected to the coolant outlet side of the first radiator 40. In this case, the first pump 61 may be provided between the first radiator 40 and the second radiator 50.

As shown in FIG. 39, the first radiator 40N and the second radiator 50N can be integrally provided. The cooling water flowing into the upstream header tank 401 of the first radiator 40 N exchanges heat and then flows to the common header tank 402. Part of the cooling water having flowed to the common header tank 402 flows through the first cooling water flow path 101, and the remaining portion flows to the second radiator 50N. The cooling water having flowed to the second radiator 50N flows from the downstream header tank 403 to the third cooling water flow path 201. Thus, the first radiator 40N and the second radiator 50N may be integrally provided, and one cooling water inlet and two cooling water outlets may be formed.

As described above, the cooling water circuits 2H, 2J, 2K, and 2L according to the present embodiment include the motor generator cooling unit 42 for cooling the motor generator, the inverter cooling unit 41 for cooling the inverter, and the ECU 3 which is an electronic control unit. The first circuits 10H and 10L in which the first pump 61 that controls and circulates the cooling water, the first radiator 40, and the second radiator 50 are mutually connected by the cooling water flow path, and the battery cooling that cools the battery The second circuits 20H, 20J, and 20K in which the unit 51, the chiller 52 that constitutes a part of the refrigeration circuit, and the second pump 63 that is controlled by the ECU 3 and that circulates the cooling water are mutually connected by the cooling water flow path. And have. The cooling water flow paths of the first circuits 10H and 10L are the first cooling water flow path 101 in which the first radiator 40 is provided, and the second cooling water flow path 102 in which the motor generator cooling portion 42 and the inverter cooling portion 41 are provided. And the third coolant channel 201 provided with the second radiator 50, and one end and the other end of each of the first coolant channel 101 and the second coolant channel 102 are connected to the first connection portion 103. The third coolant passage 201 is connected at one end to the first coolant passage 101 and at the other end to the second connection portion 104. In the cooling water flow paths of the second circuits 20H, 20J, and 20K, a bypass flow path 30 for circulating the cooling water to the battery and the chiller without passing through the first radiator 40 and the second radiator 50, the battery cooling unit 51 and the chiller 52 The bypass flow path 30 and the fourth cooling water flow path 202 are connected at the fourth connection portion 203 and the fifth connection portion 204, respectively. ing. Furthermore, it is provided on the way of the first connection flow path 31 connecting the first connection portion 103 and the fourth connection portion 203, and the third cooling water flow path 201 extending from the second radiator 50 to the second connection portion 104. A second connection flow path 32 connecting the third connection portion 106 and the fifth connection portion 204, and a first switching valve 60 and a second switching valve 62 controlled by the ECU 3 to switch the flow of the cooling water , Is provided.

The first circuit 10H, 10L and the second circuit 20H, 20J, 20K are provided because the allowable water temperature which is the temperature for cooling the battery is different from the allowable water temperature which is the temperature for cooling the motor generator and the inverter. By arranging the first pump 61 and the second pump 63, respectively, it is possible to supply cooling water at a temperature suitable for the respective allowable water temperature. The first connection flow path 31 connects the first connection portion 103 and the fourth connection portion 203, and the second connection flow path 32 connects the third connection portion 106 and the fifth connection portion 204. By switching the first switching valve and the second switching valve, for example, the cooling water can be prevented from flowing to the first cooling water flow path 101 side at the low outside air temperature, and the first radiator 40 and the second radiator 50 The battery can be warmed up without turning the cooling water. Furthermore, since the second circuits 20H, 20J, and 20K are not provided with a radiator that exchanges heat with outside air, for example, the temperature of the cooling water can be passed through the radiator when the outside air temperature is higher than the allowable water temperature of the battery. Can be cooled and the cooling water can be cooled by the chiller 52 alone. As described above, by using the first pump 61 and the second pump 63, and the first switching valve 60 and the second switching valve 62, the first circuits 10H and 10L and the second circuits can be performed with the minimum number of pumps and the number of valves. The circuits 20H, 20J, and 20K can be configured to form various cooling water flows.

In the present embodiment, a first switching valve 60 is further provided in the first connection portion 103, and a second switching valve 62 is provided in the fourth connection portion 203 or the fifth connection portion 204. Furthermore, in the first circuits 10H and 10L, the first pump 61 is provided in the first cooling water flow path 101 to the first connection portion 103 and the inlet of the first radiator 40, and in the second circuits 20H, 20J, and 20K. The second pump 63 is provided in the fourth cooling water flow path 202, the first pump 61 is disposed in the direction of flowing the cooling water to the first radiator 40 side, and the second pump 63 It is disposed in the flow direction from the connection portion 204 to the fourth connection portion 203. When one end of the third coolant channel 201 is connected to the outlet side of the first radiator 40, in the first circuits 10 H and 10 L, the third coolant channel 201 to the inlet of the second radiator 50 is thirdly connected. The first pump 61 is provided, and in the second circuits 20H, 20J, and 20K, the second pump 63 is provided in the fourth cooling water channel 202, and the first pump 61 is configured to move the cooling water to the second radiator 50 side. The second pump 63 is disposed in the flow direction, and is disposed in the direction in which the cooling water flows from the fifth connection portion 204 to the fourth connection portion 203.

By providing the first switching valve 60 and the second switching valve 62, the mode of circulating the cooling water can be changed according to the outside air temperature and the state of the battery. As described with reference to FIG. 26, the first switching valve 60 opens the first cooling water channel 101 side and the second cooling water channel 102 side, and the second switching valve 62 is the first connection channel 31. Blocking the side to prevent the flow of cooling water to the radiator in the second circuit 20H, and supplying the cooling water passing through the first radiator 40 and the second radiator 50 on the first circuit 10H side. Can be compatible.

As described with reference to FIG. 27, the first switching valve 60 opens all the flow paths, and the second switching valve 62 closes the bypass flow path 30 side, whereby the first radiator 40 and the second radiator are formed. The cooling water having passed through 50 can be supplied to both the first circuit 10H and the second circuit 20H.

As described with reference to FIG. 28, the first switching valve 60 closes the first cooling water flow passage 101 side, and the second switching valve 62 closes the bypass flow passage 30 side, so that the first radiator 40 and It is possible to switch so as not to allow the coolant to flow to the second radiator 50, and warm up can be performed.

As described with reference to FIG. 29, the first switching valve 60 is switched so that the cooling water does not flow to the motor generator cooling unit 42 and the inverter cooling unit 41, and the second switching valve 62 is switched to the bypass flow passage 30 Since the battery can be cooled using the first radiator 40, the second radiator 50, and the chiller 52 by switching so as not to flow, it is possible to cope with rapid charging.

In the present embodiment, each of the first switching valve 60 and the second switching valve 62 is preferably configured by a three-way valve. By configuring the first switching valve 60 and the second switching valve 62 with three-way valves, the number of valves used can be minimized. The first switching valve 60 and the second switching valve 62 are not limited to three-way valves as long as they can exhibit the above-described function, and even if they are configured by a combination of two-way valves and four-way valves Good.

In the present embodiment, the chiller 52 is disposed upstream of the battery cooling unit 51 in the second circuits 2020 H, 20 J, and 20 K. Since the battery is cooled using the cooling water cooled by the chiller 52, efficient cooling can be achieved by arranging the chiller 52 upstream of the battery cooling unit 51 to be cooled.

In the present embodiment, in the first circuits 10H and 10L, the inverter cooling unit 41 is disposed upstream of the motor generator cooling unit 42. Since the heat tolerance is lower in the inverter, by disposing the inverter cooling unit 41 on the upstream side of the motor generator cooling unit 42, it is possible to supply cooling water with a low temperature to the inverter.

In the present embodiment, as shown in FIGS. 32 and 33, in the second circuit 20K, a PTC heater 54, which is a heater for warm-up, is provided on the upstream side of the battery cooling unit 51. The battery cooling unit 51 can not only cool the battery but also apply heat to the battery when the battery warms up, so the PTC heater 54 is provided to supply heated cooling water to warm the battery. be able to.

In the present embodiment, as shown in FIGS. 30 and 31, in the second circuit 20J, a charger cooling unit 53 for cooling the battery charger is provided on the downstream side of the chiller 52. By arranging in this way, the battery charger can also be cooled. The charger cooling unit 53 is preferably disposed downstream of the chiller 52 and further downstream than the battery cooling unit 51. This is because the allowable temperature of the battery is lower than that of the battery charger, and the reverse arrangement may cause an excessive temperature rise of the battery.

In the present embodiment, as shown in FIGS. 34, 35, 36, in the first circuit 10L, the ventilation heat exchanger 43 that exchanges heat with the air discharged from the vehicle compartment is provided on the upstream side of the inverter cooling unit 41. ing. The ventilation heat exchanger can perform heat exchange between the cooling water and the air, which is discharged at around 25 ° C. discharged from the room especially in summer, so that the cooling water supplied to the inverter cooling unit 41 can be further cooled.

Focusing on control features through the first, second, third, and fourth embodiments, the cooling water circuit of each embodiment can be grasped as follows.

The cooling water circuits 2, 2A, 2B, 2C, 2D, 2E, 2F, 2G, 2H, 2J, 2K, and 2L cool the first cooling water flow path 101 to which the first radiator 40 is connected and the motor generator. The second cooling water flow passage 102 for passing the cooling water through the motor generator cooling unit 42 and the inverter cooling unit 41 for cooling the inverter, the third cooling water flow passage 201 to which the second radiator 50 is connected, and the battery cooling for cooling the battery In the fourth cooling water flow passage 202 not passing through the fourth cooling water flow passage 202 which passes the cooling water through the chiller 52 constituting the part 51 and part of the refrigeration circuit, and the first cooling water flow passage 101 and the third cooling water flow passage 201 A bypass flow passage 30 for circulating the cooling water, a first pump 61 disposed so as to allow the cooling water to flow through at least the second cooling water flow passage 102; A second pump 63 which is arranged so as to be capable of flow Kutomo coolant to the fourth cooling water passage 202, and a.

Furthermore, the cooling water circuits 2, 2A, 2B, 2C, 2D, 2E, 2F, 2G, 2H, 2J, 2K, and 2L are the first cooling water flow path 101, the second cooling water flow path 102, and the third cooling water flow. The flow path is switched between the path 201, the fourth cooling water flow path 202, and the bypass flow path 30, and the fourth cooling water flow path of the cooling water flowing through the first cooling water flow path 101 and the third cooling water flow path 201 The first switching valve 60 and the second switching valve 62 are provided so that the inflow to the 202 can be adjusted by cooperating with each other.

Furthermore, the cooling water circuits 2, 2A, 2B, 2C, 2D, 2E, 2F, 2G, 2H, 2J, 2K, and 2L are the first pump 61, the second pump 63, the first switching valve 60, and the second switching. The valve 62 is controlled to cool the first cooling water passage 101, the second cooling water passage 102, the third cooling water passage 201, the fourth cooling water passage 202, and the bypass passage 30 according to the outside air temperature or the battery water temperature. The ECU 3 is provided as an electronic control unit capable of executing a plurality of control modes for changing the flow of water.

Since the allowable water temperature which is the temperature for cooling the battery and the allowable water temperature which is the temperature for cooling the motor generator and the inverter are different from each other, the second cooling water channel 102 and the fourth cooling water channel 202 are provided. By arranging the first pump 61 and the second pump 63, it is possible to supply cooling water having a temperature suitable for the respective allowable water temperature. By switching the first switching valve 60 and the second switching valve 62, for example, warm-up can be performed without turning the cooling water to the first radiator 40 and the second radiator 50 when the outside air temperature is low. Furthermore, since the bypass flow path 30 for circulating the cooling water to the fourth cooling water flow path 202 without passing through the first cooling water flow path 101 and the third cooling water flow path 201 is provided, for example, Even when the outside air temperature is high and the outside air temperature is high, passing through the first radiator 40 and the second radiator 50 can prevent the temperature of the cooling water from rising, and the cooling water can be cooled by the chiller 52 alone.

In each embodiment, when the outside air temperature is higher than the water temperature to be supplied to the battery cooling unit 51, the ECU 3 as the electronic control unit sets the first cooling water passage 101 and the third cooling water passage 201 as the control mode. It is possible to execute the high outside air temperature mode in which the cooling water flowing does not flow at least in the fourth cooling water flow channel 202 and the cooling water flowing in the fourth cooling water flow channel 202 and the bypass flow channel 30 circulates.

In each embodiment, the ECU 3 as the electronic control unit performs cooling in the first cooling water flow passage 101 and the third cooling water flow passage 201 as a control mode when the outside air temperature is a low temperature required to warm up the battery. It is possible to execute the low external temperature mode in which the water does not flow at least in the fourth cooling water flow channel 202, and the cooling water flowing in the second cooling water flow channel 102 and the fourth cooling water flow channel 202 circulates.

In each embodiment, when the outside air temperature is higher than the low temperature required to warm up the battery and lower than the water temperature to be supplied to the battery, the ECU 3 as the electronic control unit performs the first cooling water passage 101 and the first The cooling water flowing through the third cooling water flow channel 201 executes the inside / outside air temperature mode flowing through the fourth cooling water flow channel 202.

The present embodiment has been described above with reference to the specific example. However, the present disclosure is not limited to these specific examples. Those appropriately modified in design by those skilled in the art are also included in the scope of the present disclosure as long as the features of the present disclosure are included. The elements included in the above-described specific examples, and the arrangement, conditions, and shapes thereof are not limited to those illustrated, but can be appropriately modified. The elements included in the above-described specific examples can be appropriately changed in combination as long as no technical contradiction arises.

Claims (56)

1. A cooling water circuit,
   A first coolant channel (101) to which the first radiator (40) is connected;
   A motor-generator cooling unit (42) for cooling the motor generator, and a second cooling water flow passage (102) for passing the cooling water through an inverter cooling unit (41) for cooling the inverter;
   A third coolant channel (201) to which the second radiator (50) is connected;
   A fourth cooling water flow passage (202) for passing cooling water through a battery cooling unit (51) for cooling the battery and a chiller (52) constituting a part of the refrigeration circuit;
   A bypass flow passage (30) for circulating cooling water to the fourth cooling water flow passage without passing through the first cooling water flow passage and the third cooling water flow passage;
   A first pump (61) arranged to allow the flow of cooling water through at least the second cooling water flow path;
   A second pump (63) arranged to allow the flow of cooling water through at least the fourth cooling water flow path;
   The flow path is switched between the first cooling water flow path, the second cooling water flow path, the third cooling water flow path, the fourth cooling water flow path, and the bypass flow path, and the first A first switching valve (60) provided so that the inflow to the fourth cooling water flow passage of the cooling water flowing through the cooling water flow passage and the third cooling water flow passage can be adjusted by cooperating with each other A second switching valve (62),
   The first pump, the second pump, the first switching valve, and the second switching valve are controlled, and the first cooling water flow path, the second cooling water flow path, and the above according to the outside air temperature or the battery water temperature. An electronic control unit (3) capable of executing a plurality of control modes for changing the flow of the cooling water in the third cooling water flow path, the fourth cooling water flow path, and the bypass flow path.
2. The cooling water circuit according to claim 1, wherein
   The electronic control unit
   As the control mode, when the outside air temperature is higher than the water temperature to be supplied to the battery cooling unit,
   The cooling water flowing through the first cooling water flow passage and the third cooling water flow passage does not flow at least the fourth cooling water flow passage, and the cooling water flowing through the fourth cooling water flow passage and the bypass flow passage circulates high outside Cooling water circuit to run temperature mode.
3. The cooling water circuit according to claim 1, wherein
   The electronic control unit
   As the control mode, when the outside air temperature is a low temperature where it is necessary to warm up the battery,
   The cooling water flowing through the first cooling water flow passage and the third cooling water flow passage does not flow at least the fourth cooling water flow passage, and the cooling water flowing through the second cooling water flow passage and the fourth cooling water passage is circulated. A cooling water circuit that performs the outside temperature mode.
4. The cooling water circuit according to claim 1, wherein
   The electronic control unit
   If the outside temperature is higher than the low temperature required to warm up the battery and lower than the water temperature to be supplied to the battery,
   The cooling water circuit, wherein the cooling water flowing through the first cooling water flow passage and the third cooling water flow passage executes an inside / outside air temperature mode flowing through the fourth cooling water passage.
5. A cooling water circuit,
   A motor generator cooling unit (42) for cooling the motor generator; an inverter cooling unit (41) for cooling the inverter; a first pump (61) controlled by the electronic control unit (3) to circulate cooling water; A first circuit (10, 10A) in which the first radiator (40) and the first radiator (40) are mutually connected by the cooling water flow path (101, 102);
   A battery cooling unit (51) for cooling the battery, a chiller (52) constituting a part of the refrigeration circuit, a second pump (63) controlled by the electronic control unit to circulate cooling water, a second radiator (50) and a second circuit (20, 20A, 20B) connected by a cooling water flow path (201, 202);
   A first connection portion (103) provided in a cooling water flow channel connected to one outflow inlet / outlet side of the first radiator, and a second connection provided in a cooling water flow channel leading to one outflow / inlet port side of the second radiator A first connection channel (31) connecting the section (203), and
   A third connection (104) provided in the cooling water flow passage connected to the other outflow / inlet side of the first radiator, and a fourth connection provided in the cooling water flow passage connected to the other outflow / inflow side of the second radiator A second connection channel (32) connecting the section (204), and
   A bypass passage (30) for circulating cooling water to the battery and the chiller without passing through the second radiator;
   A cooling water circuit provided with a first switching valve (60) and a second switching valve (62) controlled by the electronic control unit in order to switch the flow of the cooling water.
6. The cooling water circuit according to claim 5, wherein
   Furthermore, in the first circuit, the first switching valve (60) is provided in the first connection portion or the third connection portion, and in the second circuit, the second connection portion or the fourth connection is provided. The cooling water circuit in which the said 2nd switching valve (62) is provided in the part.
7. The cooling water circuit according to claim 6, wherein
   When the second switching valve is provided at the second connection portion, one end of the bypass flow passage is connected to the first connection flow passage, and the second switching valve is connected to the fourth connection portion. A cooling water circuit, one end of which is connected to the second connection channel, if provided.
8. It is a cooling water circuit according to claim 6 or 7,
   Furthermore, in the first circuit, the first pump is provided between the first connection portion and the third connection portion on the side where the motor generator cooling portion and the inverter cooling portion are disposed. The second pump includes the second pump on the side where the battery cooling unit and the chiller are disposed between the second connection unit and the fourth connection unit. ,
   When the first pump is disposed in the direction of flowing cooling water from the first connection portion through the inverter cooling portion and the motor generator cooling portion to the third connection portion, the second pump is While being arranged in a direction in which cooling water flows from the fourth connection through the battery cooling unit and the chiller to the second connection,
   When the first pump is disposed in the direction of flowing cooling water from the third connection through the inverter cooling unit and the motor generator cooling unit to the first connection, the second pump is A cooling water circuit disposed in a direction in which the cooling water flows from the second connection portion to the fourth connection portion through the battery cooling portion and the chiller.
9. The cooling water circuit according to claim 8, wherein
   If the outside air temperature is higher than the water temperature to be supplied to the battery cooling unit,
   The first switching valve closes the connection flow path side,
   The second switching valve closes the cooling water flow passage side where the second radiator is disposed,
   A cooling water circuit for driving the first pump and the second pump;
10. The cooling water circuit according to claim 8 or 9, wherein
    If the outside temperature is low enough to warm up the battery,
    The first switching valve closes the cooling water flow passage side where the first radiator is disposed,
    The second switching valve closes the cooling water flow passage side where the second radiator is disposed,
    A cooling water circuit for driving at least one of the first pump and the second pump;
11. The cooling water circuit according to any one of claims 8 to 10, wherein
    If the outside temperature is higher than the low temperature required to warm up the battery and lower than the water temperature to be supplied to the battery,
    The first switching valve and the second switching valve close the connection channel side,
    A cooling water circuit for driving the first pump and the second pump;
12. The cooling water circuit according to any one of claims 8 to 11, wherein
    If the outside temperature is a low temperature where it is necessary to warm up the motor generator,
    The first switching valve closes the cooling water flow passage side where the first radiator is disposed,
    The second switching valve closes the connection flow path side,
    A cooling water circuit for driving the first pump and the second pump;
13. The cooling water circuit according to any one of claims 8 to 12, wherein
    When charging the battery quickly,
    The first switching valve closes a cooling water flow passage side in which the motor generator cooling unit and the inverter cooling unit are disposed,
    The second switching valve opens all the flow paths,
    A cooling water circuit for driving the second pump;
14. The cooling water circuit according to any one of claims 8 to 13, wherein
    When the battery is rapidly charged from the case where the outside air temperature is higher than the water temperature to be supplied to the battery cooling unit,
    The cooling water circuit which switches the said 1st switching valve, after switching the said 2nd switching valve.
15. The cooling water circuit according to any one of claims 8 to 13, wherein
    If the outside temperature is a low temperature where it is necessary to warm up the battery, it is higher than the low temperature where it is necessary to warm up the battery and lower than the water temperature to be supplied to the battery;
    The cooling water circuit which switches the second switching valve after switching the first switching valve.
16. The cooling water circuit according to any one of claims 5 to 15, wherein
    The cooling water circuit, wherein each of the first switching valve and the second switching valve is constituted by a three-way valve.
17. The cooling water circuit according to any one of claims 5 to 8, wherein
    In the second circuit, the chiller is disposed upstream of the battery cooling unit.
18. The cooling water circuit according to any one of claims 5 to 8, wherein
    In the first circuit, the inverter cooling unit is disposed upstream of the motor generator cooling unit.
19. The cooling water circuit according to any one of claims 5 to 8, wherein
    In the second circuit (20A), a heater (54) for warming up is provided on the upstream side of the battery cooling unit.
20. The cooling water circuit according to any one of claims 5 to 8, wherein
    In the second circuit (20B), a cooling water circuit provided with a charger cooling section (53) for cooling a battery charger downstream of the chiller.
21. The cooling water circuit according to any one of claims 5 to 8, wherein
    In the first circuit (10A), a cooling water circuit is provided on the upstream side of the inverter cooling unit, wherein a ventilation heat exchanger (43) that exchanges heat with air discharged from a vehicle compartment is provided.
22. The cooling water circuit according to any one of claims 5 to 8, wherein
    The cooling water circuit, wherein the bypass flow path is provided with a flow shut valve which is controlled by the electronic control unit and suppresses the flow of the cooling water.
23. The cooling water circuit according to any one of claims 5 to 8, wherein
    Further, a third connection channel (71) connecting the cooling water channel on the first radiator side with respect to the first connection portion and the cooling water channel on the second radiator side with respect to the fourth connection portion;
    A fourth connection channel (72) connecting the cooling water channel on the first radiator side with respect to the third connection portion and the cooling water channel on the second radiator side with respect to the second connection portion is provided Cooling water circuit.
24. The cooling water circuit according to claim 23, wherein
    The coolant circuit is provided with a flow shut valve which is controlled by the electronic control unit and which suppresses the flow of coolant in at least one of the third connection channel and the fourth connection channel.
25. A cooling water circuit,
    A motor generator cooling unit (42) for cooling the motor generator; an inverter cooling unit (41) for cooling the inverter; a first pump (61) controlled by the electronic control unit (3) to circulate cooling water; A first circuit (10D, 10G) in which the first radiator (40) and the first radiator (40) are mutually connected by the cooling water flow path (101, 102);
    A battery cooling unit (51) for cooling the battery, a chiller (52) constituting a part of the refrigeration circuit, a second pump (63) controlled by the electronic control unit to circulate cooling water, a second radiator (50) and a second circuit (20D, 20E, 20F) connected by a cooling water flow path (201, 202);
    A first connection portion (103) provided in a cooling water flow channel connected to one outflow inlet / outlet side of the first radiator, and a second connection provided in a cooling water flow channel leading to one outflow / inlet port side of the second radiator A first connection channel (31) connecting the section (203), and
    A third connection (104) provided in the cooling water flow passage connected to the other outflow / inlet side of the first radiator, and a fourth connection provided in the cooling water flow passage connected to the other outflow / inflow side of the second radiator A second connection channel (32) connecting the section (204), and
    A fifth connection (205) and a sixth connection (206) provided in the cooling water flow path of the second circuit so as to circulate the cooling water to the battery and the chiller without passing through the second radiator. And a bypass channel (30) connecting the
    A cooling water circuit provided with a first switching valve (60) and a second switching valve (62) controlled by the electronic control unit in order to switch the flow of the cooling water.
26. 26. The cooling water circuit according to claim 25, wherein
    Furthermore, the first switching valve is provided in the second connection portion or the fourth connection portion, and the second switching valve is provided in the fifth connection portion or the sixth connection portion.
27. 27. The cooling water circuit according to claim 26, wherein
    Furthermore, in the first circuit, the first pump is provided between the first connection portion and the third connection portion and on the side where the first radiator is disposed; The circuit is provided with the said 2nd pump between the said 2nd connection part and the said 4th connection part in the side in which the said battery cooling part and the said chiller are arrange | positioned.
28. 28. The cooling water circuit according to claim 27, wherein
    At high outside air temperature where the outside air temperature is higher than the water temperature to be supplied to the battery cooling unit,
    The first switching valve closes the cooling water flow passage side where the battery cooling unit and the chiller are disposed,
    The second switching valve closes the cooling water flow passage side where the second radiator is disposed,
    A cooling water circuit for driving the first pump and the second pump;
29. A cooling water circuit according to claim 27 or 28, wherein
    At low ambient temperatures, where the ambient temperature is a low temperature where it is necessary to warm up the battery,
    The first switching valve closes the cooling water flow passage side where the second radiator is disposed,
    The second switching valve closes the bypass flow passage side,
    A cooling water circuit for driving the second pump;
30. The cooling water circuit according to any one of claims 27 to 29, wherein
    When the outside air temperature is higher than the low temperature required to warm up the battery and lower than the water temperature to be supplied to the battery
    The first switching valve closes the connection flow path side,
    The second switching valve closes the bypass flow passage side,
    A cooling water circuit for driving the first pump and the second pump;
31. A cooling water circuit according to any one of claims 27 to 30, wherein
    At the time of quick charge for quick charging the battery,
    The first switching valve closes the connection flow path side,
    The second switching valve closes the bypass flow passage side,
    A cooling water circuit for driving the second pump;
32. 32. A cooling water circuit according to any one of claims 27 to 31, wherein
    Switch between middle and outer air temperatures higher than the low temperature required to warm up the battery from the high outside air temperature where the outside air temperature is higher than the water temperature to be supplied to the battery cooling unit and lower than the water temperature to be supplied to the battery In the case, after switching the second switching valve after switching the first switching valve, the chiller is stopped,
    When switching from the inside / outside air temperature to the high outside air temperature, the first switching valve is switched after the second switching valve is switched after the chiller is driven.
    When switching from the middle / outside air temperature to the low outside air temperature at which the outside air temperature is a low temperature required to warm up the battery, after switching the first switching valve and reducing or stopping the output of the first pump , Drive the chiller,
    The cooling water circuit stops the chiller after switching the first switching valve after raising the output of the first pump or starting driving when switching from the low outside air temperature to the middle and outside air temperature.
33. The cooling water circuit according to any one of claims 25 to 32, wherein
    The cooling water circuit, wherein each of the first switching valve and the second switching valve is constituted by a three-way valve.
34. 28. The cooling water circuit according to any one of claims 25 to 27, wherein
    In the second circuit, the chiller is disposed upstream of the battery cooling unit.
35. 28. The cooling water circuit according to any one of claims 25 to 27, wherein
    In the first circuit, the inverter cooling unit is disposed upstream of the motor generator cooling unit.
36. 28. The cooling water circuit according to any one of claims 25 to 27, wherein
    In the second circuit (20B), a heater (54) for warming up is provided on the upstream side of the battery cooling unit.
37. A cooling water circuit according to any one of claims 25 to 28, wherein
    In the second circuit (20A), a cooling water circuit provided with a charger cooling section (53) for cooling a battery charger downstream of the chiller.
38. A cooling water circuit according to any one of claims 25 to 28, wherein
    In the first circuit (10C), a cooling water circuit is provided on the upstream side of the inverter cooling unit, wherein a ventilation heat exchanger (43) that exchanges heat with air discharged from a vehicle compartment is provided.
39. 28. The cooling water circuit according to any one of claims 25 to 27, wherein
    The first circuit is controlled by the electronic control unit on the side where the first radiator is disposed between the first connection portion and the third connection portion, thereby suppressing the flow of cooling water. A coolant circuit is provided with a flow shut valve.
40. A cooling water circuit,
    A motor generator cooling unit (42) for cooling the motor generator; an inverter cooling unit (41) for cooling the inverter; a first pump (61) controlled by the electronic control unit (3) to circulate cooling water; A first circuit (10H, 10L) in which the first radiator (40) and the second radiator (50) are connected to each other by a cooling water flow path;
    A battery cooling unit (51) for cooling the battery, a chiller (52) constituting a part of the refrigeration circuit, and a second pump (63) controlled by the electronic control unit to circulate cooling water mutually cool A second circuit (20H, 20J, 20K) connected by a water flow path,
    The cooling water flow path of the first circuit includes a first cooling water flow path (101) in which the first radiator is provided, a second cooling water flow path in which the motor generator cooling portion and the inverter cooling portion are provided ( 102) and a third coolant channel (201) provided with the second radiator, wherein the first coolant channel and the second coolant channel have one end and the other end respectively 1 connection part (103) and second connection part (104) are connected, and one end of the third cooling water flow path is connected to the first cooling water flow path, and the other end is connected to the second connection part Are
    The cooling water flow path of the second circuit includes a bypass flow path (30) that circulates the cooling water to the battery and the chiller without passing through the first radiator and the second radiator, the battery cooling unit, and the chiller And a fourth cooling water flow path (202) provided, wherein one end and the other end of each of the bypass flow path and the fourth cooling water flow path are a fourth connection portion (203) and a fifth connection portion Connected at (204),
    Furthermore, a first connection channel (31) connecting the first connection portion and the fourth connection portion;
    A second connection flow path (32) connecting a third connection portion (106) provided on the way of the third cooling water flow path from the second radiator to the second connection portion and the fifth connection portion When,
    A cooling water circuit provided with a first switching valve (60) and a second switching valve (62) controlled by the electronic control unit to switch the flow of the cooling water;
41. The cooling water circuit according to claim 40, wherein
    Furthermore, the cooling water circuit is provided with the said 1st switching valve in the said 1st connection part, and the said 2nd switching valve is provided in the said 4th connection part or the said 5th connection part.
42. 42. The cooling water circuit according to claim 41, wherein
    Furthermore, in the first circuit, the first pump is provided in the first cooling water flow path to the first connection portion and the inlet of the first radiator,
    In the second circuit, the second pump is provided in the fourth coolant channel,
    The first pump is disposed in the direction of flowing cooling water to the first radiator side, and the second pump is disposed in the direction of flowing cooling water from the fifth connection portion to the fourth connection portion. Cooling water circuit.
43. 42. The cooling water circuit according to claim 41, wherein
    When one end of the third coolant channel is connected to the outlet side of the first radiator,
    Furthermore, in the first circuit, the first pump is provided in the third cooling water passage to the inlet of the second radiator;
    In the second circuit, the second pump is provided in the fourth coolant channel,
    The first pump is disposed in a direction in which cooling water flows toward the second radiator, and the second pump is disposed in a direction in which cooling water flows from the fifth connection portion to the fourth connection portion. Cooling water circuit.
44. 44. The cooling water circuit according to claim 42 or 43, wherein
    At high outside air temperature where the outside air temperature is higher than the water temperature to be supplied to the battery cooling unit,
    The first switching valve opens the first coolant channel side and the second coolant channel side,
    The second switching valve closes the first connection channel side,
    A cooling water circuit for driving the first pump and the second pump;
45. 45. A cooling water circuit according to any one of claims 42 to 44, wherein
    At low ambient temperatures, where the ambient temperature is a low temperature where it is necessary to warm up the battery,
    The first switching valve closes the first coolant passage side,
    The second switching valve closes the fourth coolant passage side,
    A cooling water circuit for driving the second pump;
46. 46. A cooling water circuit according to any one of claims 42 to 45, wherein
    When the outside air temperature is higher than the low temperature required to warm up the battery and lower than the water temperature to be supplied to the battery
    The first switching valve opens all the flow paths,
    The second switching valve closes the fourth coolant passage side,
    A cooling water circuit for driving the first pump and the second pump;
47. 47. A cooling water circuit according to any one of claims 42 to 46, wherein
    At the time of quick charge for quick charging the battery,
    The first switching valve closes the second coolant passage side,
    The second switching valve closes the fourth coolant passage side,
    A cooling water circuit for driving the second pump;
48. 48. A cooling water circuit according to any one of claims 42 to 47, wherein
    Switch between middle and outer air temperatures higher than the low temperature required to warm up the battery from the high outside air temperature where the outside air temperature is higher than the water temperature to be supplied to the battery cooling unit and lower than the water temperature to be supplied to the battery In the case, after switching the second switching valve, the chiller is stopped,
    When switching from the middle / outside air temperature to the high outside air temperature, the second switching valve is switched after the chiller is driven.
    When switching from the middle and outside air temperature to the low outside air temperature where the outside air temperature is a low temperature required to warm up the battery, the output of the first pump is reduced or the first switching valve is switched. After that, drive the chiller,
    The cooling water circuit stops the chiller after switching the first switching valve and starting to increase the output of the first pump or starting driving when switching from the low outside air temperature to the middle and outside air temperature.
49. 49. A cooling water circuit according to any one of claims 40 to 48, wherein
    The cooling water circuit, wherein each of the first switching valve and the second switching valve is constituted by a three-way valve.
50. 44. A cooling water circuit according to any one of claims 40 to 43, wherein
    The cooling water circuit, wherein the first radiator and the second radiator are integrally provided, and one cooling water inlet and two cooling water outlets are formed.
51. 44. A cooling water circuit according to any one of claims 40 to 43, wherein
    A cooling water circuit provided with a throttle structure on the side where the cooling water flows out from the first radiator.
52. 44. A cooling water circuit according to any one of claims 40 to 43, wherein
    In the second circuit, the chiller is disposed upstream of the battery cooling unit.
53. 44. A cooling water circuit according to any one of claims 40 to 43, wherein
    In the first circuit, the inverter cooling unit is disposed upstream of the motor generator cooling unit.
54. 44. A cooling water circuit according to any one of claims 40 to 43, wherein
    In the second circuit (20B), a heater (54) for warming up is provided on the upstream side of the battery cooling unit.
55. 44. A cooling water circuit according to any one of claims 40 to 43, wherein
    In the second circuit (20A), a cooling water circuit provided with a charger cooling section (53) for cooling a battery charger downstream of the chiller.
56. 44. A cooling water circuit according to any one of claims 40 to 43, wherein
    In the first circuit (10C), a cooling water circuit is provided on the upstream side of the inverter cooling unit, wherein a ventilation heat exchanger (43) that exchanges heat with air discharged from a vehicle compartment is provided.

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