Battery Temperature Regulator

Abstract

To provide a battery temperature adjustment device from which an air can be easily vented when replacing a coolant.SOLUTION: A battery temperature adjustment device 1 that adjusts a temperature of a battery 10 by a coolant, comprises: a water filler 3 provided in a circuit 2 in which a coolant circulates; a pump 4; a plurality of thermal converters 5 and 6; an electromagnetic valve 7 which is arranged at a branch path of the circuit 2, and switches a path of the coolant; a control device 8 that controls the switching of the flow path; a thermal conversion circuit 20 that executes a thermal conversion with the battery 10; a first circuit 21 at which the first thermal converter 5 is provided; and a second circuit 22 at which the second thermal converter 6 is provided. The water filler 3 is arranged at any one of the first circuit 21 and the second circuit 22, and a switch control of the electromagnetic valve 7 is performed after an operation of the pump 4 in the case where the coolant is filled from the water filler 3. By switching the circuit 2 into a water filler arrangement circuit 210 in which the water filler 3 of any one of the first circuit 21 and the second circuit 22 is arranged, to exhaust an air remaining in the circuit 2 from the water filler 3.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a battery temperature regulating device. [Background technology]

[0002] Conventionally, in a temperature adjustment device for a battery mounted on a vehicle, a refrigerant is configured to flow through a circuit in which a battery and a heat exchanger are provided, and it is known that the flow path of the refrigerant is controlled by switching an electromagnetic valve (see Patent Document 1).

[0003] When replacing the refrigerant during vehicle maintenance, etc., if water is injected without using a vacuum water injection device, air will enter the circuit. The air is discharged from a water inlet provided in the circuit. However, if there are multiple heat exchangers or other devices that branch off into a circuit, depending on the location of the water inlet, there may be areas where the air cannot be removed. For this reason, the placement of the water inlet has been limited to locations where the air can be removed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-47555 A Summary of the Invention [Problem to be solved by the invention]

[0005] There is a demand for a battery temperature regulation device that makes it easy to remove air when replacing the refrigerant. [Means for solving the problem]

[0006] (1) A battery temperature adjustment device (e.g., battery temperature adjustment device 1) that adjusts the temperature of a battery by a refrigerant, the battery temperature adjustment device including: a water inlet (e.g., water inlet 3) that is provided in a circuit (e.g., circuit 2) through which a refrigerant circulates, a pump (e.g., pump 4) that circulates the refrigerant, a plurality of heat exchangers (e.g., first heat exchanger 5, second heat exchanger 6) that exchange heat with the refrigerant, a solenoid valve (e.g., solenoid valve 7) that is disposed in a branch path of the circuit and switches a flow path through which the refrigerant flows, a control device (e.g., control device 8) that controls the switching of the flow path by the solenoid valve, a heat exchange circuit (e.g., common circuit 20) that exchanges heat with the battery, and a first heat exchanger (e.g., first heat exchanger 5, second heat exchanger 6) that is disposed in a branch path of the circuit and switches a flow path through which the refrigerant flows. a first circuit (e.g., first circuit 21) in which a first heat exchanger (e.g., first heat exchanger 5) is provided, and a second circuit (e.g., second circuit 22) in which a second heat exchanger (e.g., second heat exchanger 6) is provided and arranged so as to be switchable from the heat exchange circuit by the solenoid valve, the water inlet is arranged in either the first circuit or the second circuit, and when refrigerant is filled through the water inlet, the solenoid valve is controlled to open and close after the pump is operated, and the circuit that circulates the refrigerant is switched to the water inlet arrangement circuit (e.g., water inlet arrangement circuit 210) in which the water inlet is arranged, of either the first circuit or the second circuit, thereby discharging air remaining in the circuit from the water inlet.

[0007] (2) In the battery temperature regulation device described above in (1), it is preferable that the refrigerant circulates from the water inlet arrangement circuit, via the heat exchange circuit, and through the water inlet arrangement circuit.

[0008] (3) In the battery temperature adjustment device described in (1) or (2) above, it is preferable that the opening and closing control includes opening a non-water inlet circuit (e.g., non-water inlet circuit 220) of either the first circuit or the second circuit in which the water inlet is not arranged after the refrigerant has circulated from the water inlet circuit to the heat exchange circuit, and switching the flow path of the refrigerant to the water inlet circuit after the refrigerant has passed through the non-water inlet circuit, and discharging air from the water inlet circuit.

[0009] (4) In the battery temperature adjustment device described in (3) above, the opening / closing control is performed to open the solenoid valve after a solenoid valve closing time (e.g., a first solenoid valve closing time t0, a second solenoid valve closing time t2) has elapsed, and it is preferable that the solenoid valve closing time is equal to or greater than the sum of the amount of refrigerant water filled in the heat exchange circuit and the amount of refrigerant water filled in the water inlet arrangement circuit divided by the flow rate when the solenoid valve is closed.

[0010] (5) In the battery temperature adjustment device described in (4) above, it is preferable that the opening / closing control is performed to open the solenoid valve for a predetermined time (e.g., a predetermined time t1) after the solenoid valve closing time has elapsed, and that a lower limit of the predetermined time is a value obtained by dividing the amount of refrigerant filled in the non-water inlet circuit by the flow rate when the solenoid valve is open, and that an upper limit of the predetermined time is a value obtained by dividing the amount of refrigerant filled in the heat exchange circuit by the flow rate when the solenoid valve is open. Effect of the Invention

[0011] According to the above (1), by controlling the opening and closing of the solenoid valve to switch the circuit to the circuit with the water inlet, the air remaining in the circuit can be guided to the circuit with the water inlet. Therefore, it becomes easier to remove the air when charging the refrigerant. This increases the freedom of the layout of the water inlet, allowing the circuit to be designed compactly and the battery temperature adjustment device to be made compact. Furthermore, water can be injected without a vacuum water injector when charging the refrigerant, reducing the burden on the user.

[0012] According to the above (2), air is reliably discharged from the water inlet arrangement circuit in which the water inlet is arranged.

[0013] According to the above (3), air remaining in a circuit without a water inlet, where no water inlet is arranged, circulates through the circuit, flows through the circuit with a water inlet, and is discharged from the water inlet. Since it is possible to discharge air regardless of where the water inlet is arranged, the layout of the water inlet is more flexible, and the circuit can be designed compactly. In addition, it is possible to make the temperature adjustment device for the battery more compact. Furthermore, water can be injected without a vacuum water injector when charging the refrigerant, reducing the burden on the user.

[0014] According to the above (4), the solenoid valve closing time can be set to be equal to or longer than the lower limit of the time it takes for the water flowing through the common circuit and the water inlet arrangement circuit to reach the water inlet and carry the air in the water inlet arrangement circuit to the water inlet and discharge it, thereby making it possible to discharge the air more accurately and efficiently.

[0015] According to the above (5), the time required to discharge the air remaining in the circuit without a water inlet into the common circuit can be set as the lower limit of the predetermined time, and the time required to prevent the air discharged from the circuit without a water inlet from flowing back into the circuit without a water inlet can be set as the upper limit of the predetermined time, thereby making it possible to discharge the air more accurately and efficiently. [Brief description of the drawings]

[0016] [Figure 1] 1 is a diagram illustrating a battery temperature regulating device according to an embodiment of the present invention. [Diagram 2] 4 is a diagram showing a state in which the solenoid valve in the battery temperature regulating device of the present embodiment is closed; FIG. [Diagram 3] 4 is a diagram showing a state in which a solenoid valve in the battery temperature regulating device of the present embodiment is opened. FIG. [Figure 4] 4 is a graph illustrating the opening and closing control of a solenoid valve in the battery temperature regulating device of the present embodiment. [Diagram 5] 4 is a graph showing a water injection rate in the battery temperature regulating device of the present embodiment. [Figure 6] FIG. 13 is a diagram showing a battery temperature regulating device according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] A first embodiment of the present invention will be described in detail below with reference to the drawings. A battery temperature regulator 1 regulates the temperature of a battery 10 mounted on a vehicle such as an electric vehicle by using a refrigerant. As shown in Fig. 1, the battery temperature regulator 1 includes a circuit 2 through which a refrigerant flows around the battery 10, and has the battery 10, the circuit 2, a water inlet 3, a pump 4, a plurality of heat exchangers (a first heat exchanger 5, a second heat exchanger 6), an electromagnetic valve 7, and a control device 8.

[0018] The battery 10 supplies power to a motor (not shown) that drives the vehicle. The battery 10 is configured by connecting a plurality of cells, and is disposed in the vehicle.

[0019] The first heat exchanger 5 is a heat exchanger for cooling that cools the battery 10 by exchanging heat with the refrigerant, and may be a radiator, a chiller, or the like.

[0020] The second heat exchanger 6 is a heat exchanger for heating that exchanges heat with the refrigerant and heats the refrigerant as necessary, and may be a heater.

[0021] The pump 4 is a water pump provided in the circuit 2, which will be described later, and sends out the refrigerant in the direction of the arrow shown in Fig. 1. The pump 4 is disposed upstream of the battery 10 in the circuit 2, and circulates the refrigerant. The refrigerant is a liquid that is difficult to freeze, and is known as a long-life coolant (LLC).

[0022] The solenoid valve 7 is disposed in a branch path of the circuit 2 and switches the flow path through which the refrigerant flows. As shown in Fig. 1, in this embodiment, a three-way valve is used.

[0023] The control device 8 is a central processing unit that is connected to the solenoid valve 7 and controls switching of the flow path by energizing or not energizing the solenoid valve 7. When the control device 8 does not energize the solenoid valve 7 (OFF state), the refrigerant flows through the first circuit 21. When the control device 8 energizes the solenoid valve 7 to turn it ON, the refrigerant flows through the second circuit 22.

[0024] The circuit 2 has a common circuit 20 as a heat exchange circuit, a first circuit 21, and a second circuit 22. The circuit 2 is configured by a tube made of a material having high heat conductivity such as a metal, and is provided so that a refrigerant circulates around the battery 10.

[0025] The common circuit 20 is disposed so as to pass around the battery 10, and exchanges heat with the battery 10. The common circuit 20 is connected to both a first circuit 21 and a second circuit 22 described below, so that both the refrigerant that has passed through the first heat exchanger 5 and the refrigerant that has passed through the second heat exchanger 6 circulate in common.

[0026] The first circuit 21 is a cooling circuit 2 in which a first heat exchanger 5 is provided and through which a refrigerant flows. The upstream side of the first circuit 21 is connected to a solenoid valve 7 arranged on the downstream side of the common circuit 20, and the downstream side is connected to the common circuit 20. The first circuit 21 is arranged so as to be switchable from the common circuit 20 by the solenoid valve 7, and the refrigerant flows through the first circuit 21 when the solenoid valve 7 is OFF.

[0027] The second circuit 22 is a heating circuit 2 in which a second heat exchanger 6 is provided and in which the refrigerant is heated and circulated. The upstream side of the second circuit 22 is connected to the solenoid valve 7 arranged downstream of the common circuit 20, and the second circuit 22 branches off separately from the first circuit 21, and the downstream side is connected to the common circuit 20. The second circuit 22 is arranged so as to be switchable from the common circuit 20 by the solenoid valve 7, and the refrigerant circulates when the solenoid valve 7 is ON.

[0028] The water inlet 3 is disposed in the first circuit 21, and is an opening that can be opened and closed for discharging the refrigerant in the circuit 2 and for injecting new refrigerant. The water inlet 3 is opened and closed to replace the refrigerant when the vehicle or the battery temperature regulation device 1 breaks down or the like. The water inlet 3 is configured to perform gas-liquid separation so that the refrigerant accumulates below and the air accumulates above, and the air above is discharged.

[0029] Next, a procedure for discharging air remaining in the circuit 2 when filling the refrigerant through the water inlet 3 for refrigerant replacement in the above-mentioned battery temperature regulation device 1 will be described. In this embodiment, the first circuit 21 in which the water inlet 3 is arranged is called the water inlet-arranged circuit 210, and the second circuit 22 in which the water inlet 3 is not arranged is called the water inlet-less circuit 220.

[0030] The refrigerant is charged from the water inlet 3. After charging, the pump 4 is operated to circulate the refrigerant in the circuit 2. As shown in FIG. 2, while the control device 8 turns off the solenoid valve 7, the refrigerant cools the battery 10 through the common circuit 20 from the water inlet arrangement circuit 210. The time during which the solenoid valve is turned off is set as the solenoid valve first closing time t0, which is the solenoid valve closing time. The solenoid valve first closing time t0 will be described later. The refrigerant also circulates so as to pass through the solenoid valve 7 via the common circuit 20 and flow through the water inlet arrangement circuit 210. While the refrigerant is circulating through the water inlet arrangement circuit 210, the air remaining in the circuit 2 at the time of charging is discharged from above the water inlet 3 arranged in the water inlet arrangement circuit 210.

[0031] As shown in Fig. 3, the control device 8 performs opening and closing control so as to open the solenoid valve 7 for a predetermined time t1 after the solenoid valve first closing time t0. When the control device 8 turns the solenoid valve 7 ON, the water inlet circuit 210 is closed and the non-water inlet circuit 220 is opened. After the refrigerant in the water inlet circuit 210 flows through the common circuit 20, the non-water inlet circuit 220 is opened to switch the flow path from the water inlet circuit 210 to the non-water inlet circuit 220. As the refrigerant circulates from the non-water inlet circuit 220 through the common circuit 20, the air contained in the non-water inlet circuit 220 moves toward the common circuit 20 together with the refrigerant.

[0032] When the control device 8 turns off the solenoid valve again after the refrigerant passes through the non-water inlet circuit 220 and the air in the non-water inlet circuit 220 moves to the common circuit 20, the flow path is switched to the water inlet circuit 210. The time during which the solenoid valve is turned off after the predetermined time t1 has elapsed is the solenoid valve second closing time t2, which is the solenoid valve closing time. The solenoid valve second closing time t2 will be described later. As shown in FIG. 2, the air passing through the common circuit 20 is discharged from the water inlet 3 through the water inlet circuit 210. In this way, the solenoid valve 7 is opened for the predetermined time t1 and then closed multiple times, and the circuit 2 for circulating the refrigerant is switched from the non-water inlet circuit 220 to the water inlet circuit 210 via the common circuit 20, so that the air remaining in the circuit 2 is discharged from the water inlet 3.

[0033] 4 and 5, by repeatedly turning the solenoid valve 7 ON and OFF, the air remaining in the circuit 220 without a water inlet is discharged reliably. If the circuit 2 is long or has curved portions, it is preferable to repeat the process multiple times. As the opening and closing control is performed multiple times, the air contained in the refrigerant gathers together to form bubbles that are discharged, improving the water injection rate.

[0034] Next, the solenoid valve first closing time t0, the predetermined time t1, and the solenoid valve second closing time t2 will be described. Here, the "water volume" refers to the total volume of the refrigerant fluid filling each of the circuits 2 (the common circuit 20, the first circuit 21, and the second circuit 22), and does not mean water (H2O), but is called the water volume to distinguish it from the flow rate. The flow rate (L / min) of the refrigerant in the circuit 2 changes when the water temperature is low or high. For example, in an environment where the air temperature is very low, when the water temperature is low, the viscosity of the refrigerant may increase. The low temperature range and the high temperature range are in the range of 0 degrees to 40 degrees, and may be set appropriately according to the environment in which the vehicle is driven.

[0035] The water volume of the common circuit 20 is V_A, the water volume of the circuit 210 with a water inlet is V_B, and the water volume of the circuit 220 without a water inlet is V_C. In addition, the flow rate in each of the circuits 2 when the solenoid valve 7 is open at low temperatures is Q_on_low, the flow rate when the solenoid valve 7 is open at high temperatures is Q_on_high, the flow rate when the solenoid valve 7 is closed at low temperatures is Q_off_low, and the flow rate when the solenoid valve 7 is closed at high temperatures is Q_off_high.

[0036] The solenoid valve first closing time t0 has a lower limit. The lower limit of the solenoid valve first closing time t0 is the closing lower limit time t0_min. The closing lower limit time t0_min is the minimum time required to move the air that has moved through the common circuit 20 toward the water inlet arrangement circuit 210 by closing the solenoid valve 7, and deliver it to the water inlet 3. The closing lower limit time t0_min is obtained by dividing the sum of the amount of refrigerant water (V_A) filled in the common circuit 20 and the amount of refrigerant water (V_B) filled in the water inlet arrangement circuit 210 by the flow rate (Q_off_low) in the common circuit 20 and the water inlet arrangement circuit 210 in a state where the solenoid valve 7 is closed at low temperature (t0_min=(V_A+V_B) / Q_off_low). The solenoid valve first closing time t0 may be equal to or greater than this lower limit.

[0037] The predetermined time t1 for opening the solenoid valve 7 is the time for turning on the solenoid valve 7 as shown in FIG.

[0038] The predetermined time t1 has a lower limit and an upper limit. The lower limit of the predetermined time t1 is defined as an opening lower limit time t1_min, and the upper limit of the predetermined time t1 is defined as an opening upper limit time t1_max. The lower limit opening time t1_min is the shortest lower limit time required to discharge the air remaining in the circuit without a water inlet 220 to the common circuit 20. The lower limit opening time t1_min is obtained by dividing the amount of refrigerant (V_C) filled in the circuit without a water inlet 220 by the flow rate (Q_on_low) in the circuit without a water inlet 220 when the solenoid valve 7 is opened at a low temperature (t1_min=V_C / Q_on_low). The upper limit open time t1_max is the longest upper limit time for which the solenoid valve 7 is kept open so that the air that has moved from the circuit without a water inlet 220 to the common circuit 20 does not return to the circuit without a water inlet 220. The upper limit open time t1_max is obtained by dividing the amount of refrigerant (V_A) filling the common circuit 20 by the flow rate (Q_on_high) in the common circuit 20 when the solenoid valve 7 is opened under high temperature (t1_max=V_A / Q_on_high). The predetermined time t1 is set so that the lower limit opening time t1_min<the predetermined time t1<the upper limit opening time t1_max.

[0039] The second solenoid valve closing time t2 is the time from when the solenoid valve 7 is opened for a predetermined time t1 until the refrigerant that has passed through the non-water inlet circuit 220 passes through the water inlet circuit 210 via the common circuit 20 and is discharged from the water inlet 3. In order to explain the procedure for performing the opening and closing control of opening and closing the solenoid valve 7 multiple times, the second solenoid valve closing time t2 is described separately from the first solenoid valve closing time t0, but the lower limit of the second solenoid valve closing time t2 can be obtained in the same manner as the first solenoid valve closing time t0. That is, the closing lower limit time t2_min is obtained by dividing the sum of the amount of refrigerant water (V_A) filled in the common circuit 20 and the amount of refrigerant water (V_B) filled in the water inlet circuit 210 by the flow rate (Q_off_low) in the common circuit 20 and the water inlet circuit 210 in a state where the solenoid valve 7 is closed at a low temperature (t2_min=(V_A+V_B) / Q_off_low). The second solenoid valve closing time t2 may be equal to or greater than this lower limit.

[0040] According to this embodiment, the following effects are achieved. (1) A battery temperature adjustment device 1 that adjusts the temperature of a battery by a refrigerant is provided in a circuit 2 through which the refrigerant circulates, and includes a water inlet 3 for injecting the refrigerant, a pump 4 for circulating the refrigerant, a plurality of heat exchangers (a first heat exchanger 5, a second heat exchanger 6) that exchange heat with the refrigerant, a solenoid valve 7 that is provided at a branch of the circuit 2 and switches the flow path through which the refrigerant flows, a control device 8 that controls the switching of the flow path by the solenoid valve 7, a common circuit 20 that exchanges heat with a battery 10, a first circuit 21 that is provided so as to be switchable from the common circuit 20 by the solenoid valve 7 and has the first heat exchanger 5 provided therein, and a second circuit 22 that is provided so as to be switchable from the common circuit 20 by the solenoid valve 7 and has the second heat exchanger 6 provided therein. The water inlet 3 is arranged in either the first circuit 21 or the second circuit 22, and when refrigerant is charged through the water inlet 3, the solenoid valve 7 is controlled to open and close after the pump 4 is operated, and the circuit 2 that circulates the refrigerant is switched to the water inlet arrangement circuit 210 in which the water inlet 3 is arranged, either the first circuit 21 or the second circuit 22, thereby discharging air remaining in the circuit 2 from the water inlet 3. By controlling the opening and closing of the solenoid valve 7 to switch the circuit 2 to the water inlet arrangement circuit 210, the air remaining in the circuit 2 can be guided to the circuit 2 having the water inlet 3. This makes it easier to remove the air when charging the refrigerant. This allows greater freedom in the layout of the water inlet 3, making it possible to design the circuit 2 compactly and to make the battery temperature regulator 1 compact. Furthermore, water can be injected without a vacuum water injector when charging the refrigerant, reducing the burden on the user.

[0041] (2) According to this embodiment, the refrigerant is circulated from the water inlet arrangement circuit 210 through the common circuit 20 to flow through the water inlet arrangement circuit 210. This ensures that air is discharged from the water inlet arrangement circuit in which the water inlet 3 is arranged.

[0042] (3) According to this embodiment, the opening and closing control is performed by opening the circuit 220 without the water inlet 3, either the first circuit 21 or the second circuit 22, after the refrigerant flows from the circuit 210 with the water inlet 3 to the common circuit 20, and after the refrigerant passes through the circuit 220 without the water inlet 3, switching the flow path of the refrigerant to the circuit 210 with the water inlet 3, and discharging the air from the circuit 210. As a result, the air remaining in the circuit 220 without the water inlet 3 also circulates through the circuit 2 and the circuit 210 with the water inlet 3, and is discharged from the circuit 210. Since it is possible to discharge the air regardless of where the water inlet 3 is disposed, the layout of the water inlet 3 is more flexible, and the circuit 2 can be designed compactly. In addition, it is possible to make the battery temperature adjustment device 1 compact. Furthermore, water can be injected without a vacuum water injector when charging the refrigerant, reducing the burden on the user.

[0043] (4) According to this embodiment, the opening and closing control is performed so that the solenoid valve 7 is opened after the solenoid valve closing time (the first solenoid valve closing time t0, the second solenoid valve closing time t2) has elapsed, and the solenoid valve closing time is set to be equal to or greater than the sum of the amount of refrigerant water (V_A) filling the common circuit 20 and the amount of refrigerant water (V_B) filling the water inlet arrangement circuit 210, divided by the flow rate when the solenoid valve 7 is closed. This makes it possible to set the solenoid valve closing time to be equal to or greater than the lower limit of the time it takes for the water flowing through the common circuit 20 and the water inlet arrangement circuit 210 to reach the water inlet 3 and carry the air in the water inlet arrangement circuit 210 to the water inlet 3 and discharge it. This makes it possible to discharge the air more accurately and efficiently.

[0044] (5) According to this embodiment, the opening and closing control is performed so that the solenoid valve 7 is opened for a predetermined time t1 after the solenoid valve closing time (the first solenoid valve closing time t0, the second solenoid valve closing time t2) has elapsed, the lower limit (t1_min) of the predetermined time t1 is set to a value obtained by dividing the amount of refrigerant (V_C) filled in the circuit without a water inlet 220 by the flow rate when the solenoid valve 7 is open, and the upper limit (t1_max) of the predetermined time t1 is set to a value obtained by dividing the amount of refrigerant (V_C) filled in the common circuit 20 by the flow rate when the solenoid valve is open. As a result, the time required to discharge the air remaining in the circuit without a water inlet 220 to the common circuit 20 can be set as the lower limit of the predetermined time t1, and the time required to prevent the air discharged from the circuit without a water inlet 220 from flowing back into the circuit without a water inlet 220 can be set as the upper limit of the predetermined time t1. This makes it possible to discharge the air more accurately and efficiently.

[0045] The present invention is not limited to the above embodiment, and modifications and improvements within the scope of achieving the object of the present invention are included in the present invention. Fig. 6 shows a battery temperature regulator 1A according to another embodiment. As shown in Fig. 6, the water inlet 3A may be arranged in the second circuit 22 in which the second heat exchanger 6 is arranged. In this case, the second circuit 22 becomes the water inlet-arranged circuit 220A, and the first circuit 21 becomes the water inlet-unarranged circuit 210A.

[0046] In another embodiment, after air is discharged from the second circuit 22 (water inlet arrangement circuit 220A) in which the second heat exchanger 6 is arranged, the solenoid valve 7 is controlled to open and close for a predetermined time t1. At this time, the control device 8 operates the solenoid valve 7 so that the air flowing through the first circuit 21 (water inlet non-arranged circuit 210A) in which the first heat exchanger 5 is arranged moves to the common circuit 20 and is then discharged from the second circuit 22 (water inlet arrangement circuit 220A) in which the second heat exchanger 6 is arranged. With this configuration as well, air can be discharged from the water inlet arrangement circuit 220A in which the second heat exchanger 6 is arranged.

[0047] In addition, whether the refrigerant flows through the first circuit 21 or the second circuit 22 when the solenoid valve 7 is turned ON or OFF may be appropriately set and changed. In addition, the opening and closing control may be started from a state in which the solenoid valve 7 is open.

[0048] In the above description, the flow rate is divided into high and low temperatures, but this is not limiting. The flow rate may be set steplessly without considering the difference in temperature. The first solenoid valve closing time, the predetermined time, and the second solenoid valve closing time are calculated by dividing the amount of water in each circuit by the flow rate.

[0049] In addition, the first solenoid valve closing time (see Figure 4) during which the refrigerant is circulated through the water inlet arrangement circuit 210 and the common circuit 20 when the solenoid valve 7 is OFF may be set in advance, and a sensor may be provided in the water inlet arrangement circuit 210 to detect whether air has been released from within the water inlet arrangement circuit 210. [Explanation of symbols]

[0050] 1 Battery temperature control device 2 Circuit 3 Water inlet 4. Pump 5 1st heat exchanger 6 Second heat exchanger 7. Solenoid valve 8 Control device 20 Common circuit (heat exchange circuit) 21 1st circuit 22 2nd circuit 210, 220A water inlet layout circuit 220, 210A water inlet non-located circuit

Claims

1. A battery temperature regulating device that regulates the temperature of a battery by a refrigerant, a water inlet provided in the circuit through which the refrigerant circulates and through which the refrigerant is injected; A pump for circulating the refrigerant; A plurality of heat exchangers for exchanging heat with the refrigerant; a solenoid valve disposed in a branch path of the circuit and switching a flow path through which the refrigerant flows; A control device that controls the switching of the flow paths by the solenoid valve; a heat exchange circuit for exchanging heat with the battery; a first circuit that is switchably arranged from the heat exchange circuit by the solenoid valve and includes a first heat exchanger; a second circuit arranged to be switchable from the heat exchange circuit by the solenoid valve and including a second heat exchanger; The water inlet is disposed in either the first circuit or the second circuit, When filling the refrigerant through the water inlet, After the pump is operated, the solenoid valve is opened and closed. By switching the circuit through which the refrigerant circulates to a water inlet arrangement circuit in which the water inlet is arranged, among either the first circuit or the second circuit, A battery temperature regulating device that expels air remaining in the circuit through the water inlet.

2. The battery temperature regulation device according to claim 1 , wherein a coolant circulates from the water inlet arrangement circuit, through the heat exchange circuit, and through the water inlet arrangement circuit.

3. The opening and closing control is configured to open a circuit in which the water inlet is not arranged, among either the first circuit or the second circuit, after the refrigerant flows from the water inlet arrangement circuit to the heat exchange circuit, and 3. The battery temperature adjustment device according to claim 1, further comprising: switching the flow path of the refrigerant to the water inlet arrangement circuit after the refrigerant has passed through the non-water inlet arrangement circuit, and discharging air from the water inlet arrangement circuit.

4. The opening / closing control is performed so as to open the solenoid valve after a solenoid valve closing time has elapsed, 4. The battery temperature control device according to claim 3, wherein the solenoid valve closing time is equal to or greater than the sum of the amount of refrigerant filled in the heat exchange circuit and the amount of refrigerant filled in the water inlet arrangement circuit divided by the flow rate when the solenoid valve is closed.

5. the opening / closing control is performed so as to open the solenoid valve for a predetermined time after the solenoid valve closing time has elapsed, The lower limit of the predetermined time is a value obtained by dividing the amount of refrigerant water filled in the circuit without a water inlet by the flow rate when the solenoid valve is open, 5. The battery temperature regulation device according to claim 4, wherein the upper limit of the predetermined time is a value obtained by dividing an amount of refrigerant filled in the heat exchange circuit by a flow rate when the solenoid valve is open.

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