JP6879122B2 - Battery temperature controller - Google Patents

Description

The present invention is a secondary battery mounted on a vehicle (hereinafter, referred to as "battery") is relates to the battery temperature regulating equipment for adjusting the temperature of the.

In recent years, in electric vehicles such as electric vehicles and hybrid vehicles (hereinafter referred to as "vehicles"), in order to shorten the charging time of the batteries mounted on the vehicles, it has been studied to increase the current value flowing through the batteries during rapid charging. ing. In that case, the current value flowing through the battery during quick charging is larger than the current value flowing through the battery when the vehicle is running using the electric motor. Specifically, the output during quick charging may be 150 kW or more. Here, the relationship between the calorific value Q of the battery, the current value I flowing through the battery, and the internal resistance value R of the battery is represented by ^{Q = I 2 × R.} That is, the calorific value of the battery increases in proportion to the square of the current value. Therefore, when performing quick charging, it is required to sufficiently cool the battery. When the battery is cooled by using the cold heat generated by the refrigeration cycle used in the air conditioner for vehicles, the output during charging can correspond to the heat generated by the battery of about 4 kW, but the output is higher than that. It cannot cope with the heat generation of the battery. When the cooling capacity of the battery cooling device mounted on the vehicle is increased to cope with the heat generation of the battery during quick charging, the following problems can be considered. For example, as the size of the battery cooling device increases, it becomes difficult to secure a vehicle mounting space. As the weight of the battery cooling device increases, the weight of the vehicle increases, and the mileage of the vehicle using the electric motor becomes shorter. Another problem is that the cost of the battery cooling device increases.

According to Patent Document 1, when charging a battery mounted on a vehicle, a heat medium is supplied from a charging device installed outside the vehicle to a liquid circuit provided in the vehicle, and the battery is cooled by using the cold heat of the heat medium. The technology to be used is described. Specifically, in this technology, when charging a battery mounted on a vehicle, a plug for supplying a heat medium provided in a charging device installed outside the vehicle is inserted into a heat medium introduction part of the vehicle, and the charging device is used. The cooled heat medium is supplied to the liquid circuit provided in the vehicle. In this technique, heat exchange is performed between the first liquid circuit to which the heat medium is supplied from the charging device and the second liquid circuit separately provided in the vehicle. Then, the battery is cooled by the heat medium circulating in the second liquid circuit. As a result, in the technique of Patent Document 1, it is possible to cool the battery without increasing the cooling capacity of the battery cooling device mounted on the vehicle.

JP-A-2017-4677

However, the technology of Patent Document 1 is the work of inserting a plug for supplying a heat medium provided in the charging device into the heat medium introduction portion of the vehicle at the start of charging the battery mounted on the vehicle, and the plug is inserted into the heat of the vehicle at the end of charging. It is necessary to remove it from the medium introduction part. Therefore, there is a possibility that foreign matter or the like may enter the liquid circuit provided in the vehicle from the connection point between the heat medium supply plug and the heat medium introduction portion of the vehicle. If the liquid circuit provided in the vehicle is clogged by the foreign matter, there is a problem that the liquid circuit may be out of order. Further, if the heat medium leaks from between the heat medium supply plug and the heat medium introduction portion of the vehicle or the heat medium drips, the vehicle, the charging worker, the charging station, etc. become dirty by the heat medium. There is a problem that it ends up. If a flammable liquid is used as the heat medium, there is a risk of ignition.

In view of the above points, it is an object of the present invention to provide a battery temperature control device capable of adjusting the temperature of a battery by utilizing heat supplied by heat contact from an external heat source supply device .

In order to achieve the above object, the invention according to claim 1 is
It is a battery temperature control device that adjusts the temperature of the battery (2) mounted on the vehicle by using the heat supplied from the external heat source supply device (80) installed outside the vehicle (3).
A battery heat exchanger (10) that exchanges heat between the battery and the heat medium,
Piping (21, 22) connected to the heat exchanger for batteries and through which the heat medium flows,
It has an in-vehicle heat contact surface (35) that can be in direct contact with the external heat contact surface (84) of the external heat source supply device or indirectly through a heat conductive member (6), and is in-vehicle from the external heat contact surface. It is provided with a connection heat exchanger (30) that cools or heats a heat medium flowing through a pipe by heat transferred through a heat contact surface.

According to this, the heat medium cooled or heated by the connection heat exchanger by the thermal contact between the external heat contact surface and the vehicle-mounted heat contact surface flows to the battery heat exchanger through the pipe. The battery heat exchanger can cool or warm the battery by exchanging heat between the heat medium and the battery. Therefore, unlike the technique described in Patent Document 1, this battery temperature control device does not allow the heat medium to flow from the external heat source supply device into the circuit of the heat medium of the battery temperature control device, so that the heat of the battery temperature control device does not flow into the circuit. Foreign matter and the like can be prevented from entering the circuit of the medium. Further, since the heat medium does not leak or drip between the external heat contact surface and the vehicle-mounted heat contact surface, it is possible to prevent the vehicle, the charging operator, the charging station, or the like from being contaminated by the heat medium. Further, the battery temperature control device adjusts the temperature of the battery mounted on the vehicle by using the heat supplied from the external heat source supply device installed outside the vehicle, thereby increasing the weight and physique of the battery temperature control device. It is possible to increase the cooling capacity of the battery without causing it. Therefore, this battery temperature control device can prevent circuit failure and can adjust the battery temperature cleanly, safely, and with a large capacity.

The reference numerals in parentheses attached to each of the above configurations indicate an example of the correspondence with the specific configurations described in the embodiments described later.

It is a schematic diagram of the vehicle and the charging device equipped with the battery temperature control device according to the first embodiment. It is a circuit block diagram of the battery temperature control device and the charging device which concerns on 1st Embodiment. It is a perspective view which shows the schematic structure of the battery temperature control device which concerns on 1st Embodiment. It is a circuit block diagram of the battery temperature control device and the charging device which concerns on 1st Embodiment. It is a schematic diagram of the vehicle and the charging device equipped with the battery temperature control device according to the second embodiment. It is a circuit block diagram of the battery temperature control device and the charging device which concerns on 3rd Embodiment. It is a circuit block diagram of the battery temperature control device and the charging device which concerns on 4th Embodiment. It is a circuit block diagram of the battery temperature control device and the charging device which concerns on 5th Embodiment. It is a schematic diagram of the vehicle and the charging device equipped with the battery temperature control device according to the sixth embodiment. It is a flowchart which shows the control process which the battery control device and the charge control device execute. It is a circuit block diagram of the charging device which concerns on 7th Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the following embodiments, parts that are the same or equal to each other will be described with the same reference numerals.

(First Embodiment)
The first embodiment will be described with reference to FIGS. 1 to 3. The battery temperature control device 1 of the first embodiment is mounted on an electric vehicle (hereinafter, simply referred to as "vehicle 3") such as an electric vehicle or a hybrid vehicle. The battery temperature control device 1 of the first embodiment cools or warms a secondary battery (hereinafter, referred to as “battery 2”) mounted on the vehicle 3 to adjust the temperature of the battery 2.

First, the battery 2 to be cooled and warmed up by the battery temperature control device 1 will be described. The large battery 2 installed in the vehicle 3 is mounted under the seat of the vehicle 3 or under the trunk room as a battery pack (that is, a power storage device) in which a plurality of battery modules in which a plurality of battery cells are combined are stored. .. The electric power stored in the battery 2 is supplied to the vehicle traveling motor via an inverter or the like. The battery 2 has a configuration that can be charged by electric power supplied from a charging device 70 installed outside the vehicle 3. The charging device 70 may be a quick charging device having an output of 150 kW or more capable of performing quick charging, or a charging device having an output of 150 kW or less.

The battery 2 self-heats when it is discharged or charged while the vehicle is running, or when it is charged when power is supplied from the charging device 70 installed outside the vehicle 3. When the temperature of the battery 2 becomes high, not only does it not exhibit sufficient functions, but it also deteriorates or is damaged. Therefore, a cooling device for maintaining the battery 2 at a certain temperature or lower is required. On the other hand, when the battery 2 is in a low temperature state, the internal resistance of the battery 2 becomes large and charging cannot be performed. Therefore, a warm-up device for warming up the low-temperature battery 2 at the start of charging in a low-temperature environment is required.

Further, the battery 2 is configured as a battery module including a plurality of battery cells, but if the temperature of each battery cell varies, the deterioration of the battery cells is biased, and the storage performance of the battery 2 deteriorates. .. This is because the input / output characteristics of the power storage device are determined according to the characteristics of the most deteriorated battery cell. Therefore, in order for the battery 2 to exhibit the desired performance over a long period of time, it is important to equalize the temperature to reduce the temperature variation between the plurality of battery cells.

Further, in general, as another cooling device for cooling the battery 2, a blower blowing method may be adopted. However, since the blower only blows the air inside the vehicle, the cooling capacity is low. Further, since the battery 2 is cooled by the sensible heat of the air in the air blown by the blower, the temperature difference between the upstream and the downstream of the air flow becomes large, and the temperature variation between the plurality of battery cells cannot be sufficiently suppressed. Against this background, the battery temperature control device 1 of the first embodiment employs a thermosiphon system that adjusts the temperature of the battery 2 by natural circulation of a heat medium.

As shown in FIG. 1, the battery temperature control device 1 of the first embodiment uses cold heat or heat supplied from an external heat source supply device 80 provided in a charging device 70 installed outside the vehicle 3. It is a device capable of adjusting the temperature of the battery 2 mounted on the vehicle 3.

The charging device 70 of the present embodiment includes an external heat source supply device 80 and an external power supply device 90. The external power supply device 90 includes an external power supply device main body 91, a charging cable 92, a charging connector 93, and the like. The charging connector 93 included in the external power supply device 90 can be inserted into the charging port 4 provided in the vehicle 3. In that state, the external power supply device 90 is connected to the battery 2 mounted on the vehicle 3 from the external power supply device main body 91 via the charging cable 92, the charging connector 93, the charging port 4, the wiring 5 inside the vehicle, and the like. Supply power. When power is supplied to the battery 2 from the external power supply device 90, the battery 2 is charged.

On the other hand, the external heat source supply device 80 includes an external heat source supply device main body 81, an external pipe 82, an external connection heat exchanger 83, and the like. The externally connected heat exchanger 83 included in the external heat source supply device 80 may be in direct contact with the vehicle-mounted heat contact surface 35 provided in the vehicle 3, or may be indirect heat contact via the heat conductive member 6. It is possible. In that state, the external heat source supply device 80 supplies cold heat or heat from the external heat source supply device main body 81 to the vehicle-mounted heat contact surface 35 via the external pipe 82 and the external connection heat exchanger 83. When cold heat or heat is supplied from the external heat source supply device 80 to the battery temperature control device 1, the battery temperature control device 1 uses the heat to cool or warm the battery 2. The external heat source supply device 80 may be provided separately from the charging device 70.

Next, the configuration of the battery temperature control device 1 will be described. As shown in FIGS. 2 and 3, the battery temperature control device 1 includes a battery heat exchanger 10, pipes 21 and 22, a connection heat exchanger 30, and an in-vehicle heat source unit 40. The battery temperature control device 1 constitutes a thermosiphon circuit in which a heat medium circulates. As the heat medium, for example, a fluorocarbon-based working fluid such as HFO-1234yf or HFC-134a is used.

The battery heat exchanger 10 has an upper header tank 11, a lower header tank 12, and a plurality of tubes 13 that communicate the upper header tank 11 and the lower header tank 12. The plurality of tubes 13 included in the battery heat exchanger 10 extend along the direction of gravity. In addition, in this specification, "along the direction of gravity" means that in addition to the state parallel to the direction of gravity, the state of being tilted by about 30 ° with respect to the direction of gravity is also included. The liquid level FL1 of the heat medium circulating in the thermosiphon circuit is located in the middle of the flow path inside the tube 13 of the battery heat exchanger 10. The battery heat exchanger 10 is adhered to the battery 2 with an adhesive heat radiating sheet or the like (not shown). Therefore, the battery heat exchanger 10 can exchange heat between the battery 2 and the heat medium.

The connection heat exchanger 30 also has an upper header tank 31, a lower header tank 32, and a plurality of tubes 33 that communicate the upper header tank 31 and the lower header tank 32. The plurality of tubes 33 included in the connection heat exchanger 30 also extend along the direction of gravity. The liquid level FL2 of the heat medium circulating in the thermosiphon circuit is located in the middle of the flow path inside the tube 33 of the connection heat exchanger 30. The connection heat exchanger 30 has an in-vehicle heat contact surface 35 at a position where it can be exposed to the outside of the vehicle. The vehicle-mounted thermal contact surface 35 is formed along the direction of gravity. In FIG. 3, in order to show the range of the vehicle-mounted thermal contact surface 35 in an easy-to-understand manner, the vehicle-mounted thermal contact surface 35 is hatched although it is not a cross section. A cover (not shown) may be provided on the outer wall of the vehicle located outside the vehicle-mounted thermal contact surface 35, and the vehicle-mounted thermal contact surface 35 may be exposed to the outside of the vehicle by opening the cover.

The external heat contact surface 84 of the externally connected heat exchanger 83 included in the external heat source supply device 80 comes into direct contact with the vehicle-mounted heat contact surface 35, or indirectly via a heat conductive member 6 such as a heat radiating sheet. It is possible to make thermal contact. The external connection heat exchanger 83 included in the external heat source supply device 80 is shown with respect to the vehicle 3 or the connection heat exchanger 30 in a state where the vehicle-mounted heat contact surface 35 and the external heat contact surface 84 are in thermal contact. It is fixed by a clamp device or the like. In the connection heat exchanger 30, the heat medium flowing inside the connection heat exchanger 30 is cooled or heated by cold heat or heat transmitted from the external heat contact surface 84 of the external heat source supply device 80 through the vehicle-mounted heat contact surface 35. It is configured to.

The pipe 21 connects the heat exchanger 10 for batteries and the connection heat exchanger 30, and circulates a heat medium between them. Further, the pipe 22 connects the battery heat exchanger 10 and the vehicle-mounted heat source unit 40, and circulates a heat medium between them. In the following description, the pipe 21 connecting the battery heat exchanger 10 and the connection heat exchanger 30 will be referred to as a first pipe 21. Further, the pipe 22 that connects the battery heat exchanger 10 and the vehicle-mounted heat source unit 40 is referred to as a second pipe 22.

The first pipe 21 has a first liquid passage 211 and a first gas passage 212. The first liquid passage 211 connects the outflow port 121 provided in the lower header tank 12 of the battery heat exchanger 10 and the outflow port 321 provided in the lower header tank 32 of the connection heat exchanger 30. .. That is, the first liquid passage 211 has an outflow port 121 provided below the liquid level FL1 of the heat medium in the heat exchanger 10 for batteries and a liquid level FL2 of the heat medium in the connected heat exchanger 30. It is connected to the outflow port 321 provided on the lower side. The first gas passage 212 connects the outflow port 111 provided in the upper header tank 11 of the battery heat exchanger 10 and the outflow port 311 provided in the upper header tank 31 of the connection heat exchanger 30. .. That is, the first gas passage 212 is located above the outflow port 111 provided above the liquid level FL1 of the heat medium in the battery heat exchanger 10 and the liquid level FL2 of the heat medium in the connected heat exchanger 30. It is connected to the outflow port 311 provided on the upper side. As a result, the battery heat exchanger 10, the connection heat exchanger 30, the first liquid passage 211, and the first gas passage 212 form the first thermosiphon circuit 100 in which the heat medium circulates.

The in-vehicle heat source unit 40 is composed of one or a plurality of radiators. In the first embodiment, the vehicle-mounted heat source unit 40 includes an air radiator 41 and a refrigerant radiator 42 connected to the evaporator 51 of the refrigeration cycle 50. The air radiator 41 dissipates the heat of the heat medium flowing inside the air radiator 41 to the outside air by exchanging heat between the heat medium flowing inside the air radiator 41 and the outside air passing through the air radiator 41. It is a heat exchanger to make it. Further, the refrigerant radiator 42 heats the heat medium flowing inside the refrigerant radiator 42 by exchanging heat between the heat medium flowing inside the refrigerant radiator 42 and the low-temperature low-pressure refrigerant circulating in the refrigeration cycle 50. Is a heat exchanger that dissipates heat to the refrigerant circulating in the refrigeration cycle 50. The air radiator 41 and the refrigerant radiator 42 can be used properly according to the heat generation state of the battery 2 or the running state of the vehicle 3. Further, the vehicle-mounted heat source unit 40 may be a liquid-cooled radiator that exchanges heat between a liquid such as cooling water flowing through a liquid circuit (not shown) and a heat medium instead of the air radiator 41 or the refrigerant radiator 42. .. Further, the in-vehicle heat source unit 40 may be configured by a Peltier element.

The second pipe 22 has a second liquid passage 221 and a second gas passage 222. The second liquid passage 221 has an outflow port 122 provided in the lower header tank 12 of the battery heat exchanger 10, an outflow port 411 provided under the air radiator 41, and a lower side of the refrigerant radiator 42. It is connected to the outflow port 421 provided in. The second gas passage 222 is provided above the outflow port 112 provided in the upper header tank 11 of the battery heat exchanger 10, the outflow port 412 provided above the air radiator 41, and above the refrigerant radiator 42. It is connected to the outflow port 422. As a result, the heat exchanger 10 for batteries, the air radiator 41, the refrigerant radiator 42, the second liquid passage 221 and the second gas passage 222 also form a second thermosiphon circuit 200 in which the heat medium circulates. The first thermosiphon circuit 100 and the second thermosiphon circuit 200 communicate with each other, and the same heat medium circulates.

Subsequently, the movement of the heat medium when the battery temperature control device 1 cools the battery 2 will be described with reference to FIG. In FIG. 2, the movement of the gas heat medium is indicated by a broken line arrow, and the movement of the liquid heat medium is indicated by a solid arrow. The movement of the heat medium shown in FIG. 2 is when the battery 2 is being charged with the charging connector 93 included in the external power supply device 90 inserted into the charging port 4 provided in the vehicle 3. belongs to. Further, the movement of the heat medium is such that the externally connected heat exchanger 83 included in the external heat source supply device 80 is in direct contact with the vehicle-mounted heat contact surface 35, or is indirectly in thermal contact via the heat conductive member 6. It is in a state. In that state, the external heat source supply device 80 supplies cold heat from the external connection heat exchanger 83 to the vehicle-mounted heat contact surface 35.

When the battery 2 generates heat, the heat is absorbed by the heat medium in the battery heat exchanger 10, and the heat medium evaporates inside the battery heat exchanger 10. A part of the heat medium that has become gas in the battery heat exchanger 10 flows from the battery heat exchanger 10 through the first gas passage 212 into the connection heat exchanger 30. Further, the other part of the heat medium that has become gas in the battery heat exchanger 10 flows from the battery heat exchanger 10 through the second gas passage 222 into the air radiator 41 and the refrigerant radiator 42. That is, the heat absorbed from the battery to the heat medium inside the battery heat exchanger 10 is transported by the heat medium to the connection heat exchanger 30, the air radiator 41, and the refrigerant radiator 42.

As described above, the external heat contact surface 84 of the externally connected heat exchanger 83 and the in-vehicle heat contact surface 35 of the connected heat exchanger 30 are in direct contact or indirectly in thermal contact via the heat conductive member 6. ing. Therefore, cold heat is supplied from the external heat contact surface 84 of the external heat source supply device 80 to the heat medium of the connection heat exchanger 30 via the vehicle-mounted heat contact surface 35. As a result, the heat medium of the connection heat exchanger 30 dissipates heat to the external heat contact surface 84 via the vehicle-mounted heat contact surface 35 and condenses. The heat medium that has become liquid in the connection heat exchanger 30 flows through the first liquid passage 211 and flows into the battery heat exchanger 10.

On the other hand, the heat medium flowing through the air radiator 41 dissipates heat to the outside air and condenses. Further, the heat medium flowing through the refrigerant radiator 42 dissipates heat to the refrigerant flowing through the refrigerating cycle 50 and condenses. The heat mediums that have become liquid in the air radiator 41 and the refrigerant radiator 42 each flow down the second liquid passage 221 and flow into the heat exchanger 10 for batteries.

In this way, the heat generated from the battery 2 is transported to the connection heat exchanger 30, the air radiator 41, and the refrigerant radiator 42 by the heat medium evaporated in the battery heat exchanger 10, and is externally used in each device. The heat is dissipated to the heat contact surface 84, the outside air, or the refrigerant flowing through the refrigeration cycle 50. As a result, the battery temperature control device 1 of the first embodiment can cool the battery 2 mounted on the vehicle 3.

Next, the movement of the heat medium when the battery temperature control device 1 warms up the battery 2 in the low temperature state at the start of charging in a low temperature environment will be described with reference to FIG. Also in FIG. 4, the movement of the gas heat medium is indicated by a broken line arrow, and the movement of the liquid heat medium is indicated by a solid arrow. The movement of the heat medium shown in FIG. 4 is such that the externally connected heat exchanger 83 included in the external heat source supply device 80 comes into direct contact with the vehicle-mounted heat contact surface 35, or indirectly via the heat conductive member 6. It is in a state of thermal contact.

At the start of charging in a low temperature environment, heat is supplied from the external heat contact surface 84 of the external heat source supply device 80 to the vehicle-mounted heat contact surface 35 of the connection heat exchanger 30. As a result, the heat medium flowing through the connection heat exchanger 30 absorbs heat from the vehicle-mounted heat contact surface 35 and the external heat contact surface 84, and the heat medium evaporates in the connection heat exchanger 30. The heat medium that has become gas in the connection heat exchanger 30 flows from the connection heat exchanger 30 through the first gas passage 212 into the battery heat exchanger 10. The gas heat medium that has flowed into the battery heat exchanger 10 dissipates heat to the battery 2 and condenses. As a result, the battery 2 is warmed up. The heat medium that has become liquid in the battery heat exchanger 10 flows through the first liquid passage 211 and flows into the connection heat exchanger 30.

In this way, the heat supplied from the external heat contact surface 84 of the external heat source supply device 80 to the vehicle-mounted heat contact surface 35 is transported to the battery heat exchanger 10 by the heat medium vaporized by the connection heat exchanger 30. It is transmitted to the battery 2. As a result, the battery temperature control device 1 of the first embodiment can warm up the battery 2 mounted on the vehicle 3.

The battery temperature control device 1 of the first embodiment described above has the following effects.
(1) In the first embodiment, the connection heat exchanger 30 included in the battery temperature control device 1 directly contacts the external heat contact surface 84 of the external heat source supply device 80 or indirectly heats through the heat conductive member 6. It has an in-vehicle thermal contact surface 35 that can be contacted. The connection heat exchanger 30 cools or heats the heat medium by the heat transferred from the external heat contact surface 84 of the external heat source supply device 80 to the vehicle-mounted heat contact surface 35.

According to this, the heat medium cooled or heated by the thermal contact between the external thermal contact surface 84 and the vehicle-mounted thermal contact surface 35 flows to the battery heat exchanger 10 through the first pipe 21. The battery heat exchanger 10 can cool or warm the battery 2 by exchanging heat between the heat medium and the battery 2. Therefore, unlike the technique described in Patent Document 1, the battery temperature control device 1 does not allow a heat medium to flow from the external heat source supply device 80 into the battery temperature control device 1, so that the heat medium of the battery temperature control device 1 does not flow into the battery temperature control device 1. It is possible to prevent foreign matter from entering the circuit. Further, since the heat medium does not leak or drip between the external heat contact surface 84 and the vehicle-mounted heat contact surface 35, it is possible to prevent the vehicle 3, the charging worker, the charging station, or the like from being contaminated by the heat medium. Further, since the battery temperature control device 1 adjusts the temperature of the battery 2 by using the heat supplied from the external heat source supply device 80 installed outside the vehicle 3, the weight and physique of the battery temperature control device 1 are increased. It is possible to increase the cooling capacity of the battery 2 without causing the battery 2. Therefore, the battery temperature control device 1 can prevent circuit failure and can adjust the temperature of the battery 2 cleanly, safely, and with a large capacity.

(2) In the first embodiment, the battery heat exchanger 10, the first pipe 21, and the connection heat exchanger 30 included in the battery temperature control device 1 constitute the first thermosiphon circuit 100. The liquid levels FL1 and FL2 of the heat medium circulating in the first thermosiphon circuit 100 are located in the middle of the inner flow path of the battery heat exchanger 10 and are located in the inner flow path of the connection heat exchanger 30. It is located on the way. According to this, the heat medium can both evaporate and condense in the inner flow path of the battery heat exchanger 10. Further, in the flow path inside the connection heat exchanger 30, the heat medium can both evaporate and condense. Therefore, the battery temperature control device 1 cools and warms the battery 2 by the cold heat or heat transmitted from the external heat contact surface 84 of the external heat source supply device 80 to the connection heat exchanger 30 via the vehicle-mounted heat contact surface 35. It is possible to do both.

(3) In the first embodiment, the battery temperature control device 1 includes a refrigerant radiator 42 connected to the evaporator 51 of the refrigeration cycle 50 and an air radiator 41 as an in-vehicle heat source unit 40. According to this, the battery temperature control device 1 uses the in-vehicle heat source unit 40 as a cold heat supply source for battery cooling and an external heat source according to the state of the vehicle when the battery 2 is being charged and discharged and the heat generation state of the battery. Battery cooling using the supply device 80 as a cold heat supply source can be used properly. For example, when the battery 2 is charged from the external power supply device 90 while the vehicle 3 is stopped, when the amount of heat generated by the battery 2 is large, both the external heat source supply device 80 and the in-vehicle heat source unit 40 are used as cold heat supply sources. It is possible to cool the battery. Further, in that case, when the calorific value of the battery 2 is small and the occupant is in the vehicle, the battery is cooled by using the external heat source supply device 80 as the cold heat supply source, and the refrigeration cycle 50 is the vehicle interior air conditioner. It can also be used as a cold heat supply source. On the other hand, when the battery 2 is charged and discharged while the vehicle is running, it is possible to cool the battery using the in-vehicle heat source unit 40 as a cold heat supply source.

(Second Embodiment)
The second embodiment will be described with reference to FIG. In the second embodiment, the arrangement of the connection heat exchanger 30 is changed with respect to the first embodiment, and the other parts are the same as those in the first embodiment. Therefore, only the parts different from the first embodiment will be described. To do.

Also in the second embodiment, the battery temperature control device 1 constitutes a thermosiphon circuit as in the first embodiment. The connection heat exchanger 30 included in the battery temperature control device 1 is provided on the upper side in the gravity direction with respect to the battery heat exchanger 10. In this case, the liquid level FL1 of the heat medium circulating in the thermosiphon circuit is located in the middle of the flow path inside the heat exchanger 10 for batteries. Alternatively, the liquid level FL1 of the heat medium may be located in the middle of the first pipe 21 that connects the battery heat exchanger 10 and the connection heat exchanger 30. The vehicle-mounted thermal contact surface 35 of the second embodiment is also provided at a position where it can be exposed to the outside of the vehicle, as in the first embodiment. The external heat contact surface 84 of the externally connected heat exchanger 83 included in the external heat source supply device 80 comes into direct contact with the vehicle-mounted heat contact surface 35, or indirectly via a heat conductive member 6 such as a heat radiating sheet. It is possible to make thermal contact. The connection heat exchanger 30 can cool the heat medium flowing inside the connection heat exchanger 30 by the cold heat transmitted from the external heat contact surface 84 of the external heat source supply device 80 through the vehicle-mounted heat contact surface 35. is there.

Also in the second embodiment, when the battery 2 generates heat, the heat is absorbed by the heat medium in the battery heat exchanger 10, and the heat medium evaporates in the battery heat exchanger 10. The heat medium that has become gas in the battery heat exchanger 10 flows from the battery heat exchanger 10 through the first gas passage 212 into the connection heat exchanger 30. The heat medium flowing through the connection heat exchanger 30 dissipates heat to the external heat contact surface 84 via the vehicle-mounted heat contact surface 35 and condenses. The heat medium that has become liquid in the connection heat exchanger 30 flows through the first liquid passage 211 and flows into the battery heat exchanger 10. Although not shown, the heat medium flowing from the battery heat exchanger 10 to the air radiator 41 and the refrigerant radiator 42 also dissipates heat to the outside air or the refrigerant flowing through the refrigeration cycle 50 and condenses. The heat medium that has become liquid in the air radiator 41 or the refrigerant radiator 42 flows through the second liquid passage 221 and flows into the battery heat exchanger 10. As a result, the battery temperature control device 1 of the second embodiment can also cool the battery 2 mounted on the vehicle 3 as in the first embodiment.

(Third Embodiment)
The third embodiment will be described with reference to FIG. In the third embodiment, the battery temperature control device 1 is configured by a liquid circuit in which a liquid such as water or oil circulates. A liquid such as water or oil is an example of a heat medium that circulates in a liquid circuit.

The battery temperature control device 1 of the third embodiment includes a battery heat exchanger 10, a first pipe 21, a connection heat exchanger 30, a second pipe 22, an in-vehicle heat source unit 40, and the like. In addition, the battery temperature control device 1 of the third embodiment includes a first pump 25 provided in the middle of the first pipe 21, a second pump 26 and a valve 27 provided in the middle of the second pipe 22. I have. It is also possible to omit either one of the first pump 25 and the second pump 26.

The battery heat exchanger 10, the first pipe 21, the connection heat exchanger 30, and the first pump 25 constitute the first liquid circuit 300. The first pipe 21 has a first outward passage 213 and a first return passage 214 for connecting the battery heat exchanger 10 and the connection heat exchanger 30. When the first pump 25 is driven, the heat medium circulates in the first liquid circuit 300.

The battery heat exchanger 10, the second pipe 22, the vehicle-mounted heat source unit 40, the second pump 26, and the valve 27 constitute the second liquid circuit 400. The second pipe 22 has a second outward passage 223 and a second return passage 224 that connect the battery heat exchanger 10 and the connection heat exchanger 30. When the second pump 26 is driven with the valve 27 open, the heat medium circulates in the second liquid circuit 400. The first liquid circuit 300 and the second liquid circuit 400 communicate with each other, and the same heat medium circulates.

In FIG. 6, the movement of the heat medium when the battery temperature control device 1 cools the battery 2 is indicated by arrows. That is, the movement of the heat medium shown in FIG. 6 is when the battery 2 is being charged with the charging connector 93 included in the external power supply device 90 inserted into the charging port 4 provided in the vehicle 3. belongs to. Further, the movement of the heat medium is such that the externally connected heat exchanger 83 included in the external heat source supply device 80 is in direct contact with the vehicle-mounted heat contact surface 35, or is indirectly in thermal contact via the heat conductive member 6. In this state, cold heat is being supplied from the externally connected heat exchanger 83 to the vehicle-mounted heat contact surface 35.

When the battery 2 generates heat, the heat is absorbed by the heat medium flowing inside the battery heat exchanger 10. When the first pump 25 is driven, the heat medium heated by the battery heat exchanger 10 flows from the battery heat exchanger 10 through the first return passage 214 into the connection heat exchanger 30. When the valve 27 opens and the second pump 26 is driven, the heat medium heated by the battery heat exchanger 10 passes from the battery heat exchanger 10 through the second return passage 224, and the air radiator 41 and the refrigerant. It flows into the radiator 42.

As described above, the external heat contact surface 84 of the externally connected heat exchanger 83 and the in-vehicle heat contact surface 35 of the connected heat exchanger 30 are in direct contact or indirectly in thermal contact via the heat conductive member 6. ing. Therefore, cold heat is supplied from the external heat contact surface 84 of the external heat source supply device 80 to the heat medium flowing through the connection heat exchanger 30 via the vehicle-mounted heat contact surface 35. Therefore, the heat medium flowing through the connection heat exchanger 30 dissipates heat to the external heat contact surface 84 via the vehicle-mounted heat contact surface 35. The heat medium cooled by the connection heat exchanger 30 flows through the first outbound passage 213 and flows into the battery heat exchanger 10.

On the other hand, the heat medium flowing through the air radiator 41 dissipates heat to the outside air. Further, the heat medium flowing through the refrigerant radiator 42 dissipates heat to the refrigerant flowing through the refrigerating cycle 50. The heat medium cooled by the air radiator 41 and the refrigerant radiator 42 each flows into the battery heat exchanger 10 from the second outbound passage 223.

In this way, the heat generated from the battery 2 is transported from the battery heat exchanger 10 to the connection heat exchanger 30, the air radiator 41, and the refrigerant radiator 42 by the heat medium, and external heat is generated in each device. Heat is dissipated to the contact surface 84, the outside air, or the refrigerant flowing through the refrigeration cycle 50. As a result, the battery temperature control device 1 of the third embodiment can cool the battery 2 mounted on the vehicle 3.

In the third embodiment, the movement of the heat medium when the battery temperature control device 1 warms up the battery 2 in the low temperature state at the start of charging in a low temperature environment is not shown by arrows. At the start of charging in a low temperature environment, heat is supplied from the external heat contact surface 84 of the external heat source supply device 80 to the vehicle-mounted heat contact surface 35 of the connection heat exchanger 30. As a result, the heat medium flowing through the connection heat exchanger 30 absorbs heat from the vehicle-mounted heat contact surface 35 and the external heat contact surface 84, and the heat medium is heated in the connection heat exchanger 30. The heat medium heated by the connection heat exchanger 30 by the drive of the first pump 25 flows from the connection heat exchanger 30 through the first return passage 214 into the battery heat exchanger 10. The heat medium that has flowed into the battery heat exchanger 10 dissipates heat to the battery 2. As a result, the battery 2 is warmed up.

In this way, the heat supplied from the external heat contact surface 84 of the external heat source supply device 80 to the vehicle-mounted heat contact surface 35 is transported to the battery heat exchanger 10 by the heat medium heated by the connection heat exchanger 30. , It is transmitted to the battery 2. As a result, the battery temperature control device 1 of the third embodiment can also warm up the battery 2 mounted on the vehicle 3.

The battery temperature control device 1 of the third embodiment described above has a simple configuration using a liquid circuit, and uses the heat supplied from the external heat source supply device 80 to control the temperature of the battery 2 mounted on the vehicle 3. Can be adjusted.

(Fourth Embodiment)
The fourth embodiment will be described with reference to FIG. The fourth embodiment is provided with the Peltier element 71 between the external thermal contact surface 84 and the vehicle-mounted thermal contact surface 35 as compared with the first embodiment. In the fourth embodiment, heat transfer is performed between the external thermal contact surface 84 and the vehicle-mounted thermal contact surface 35 via the Peltier element 71. The Peltier element 71 of the fourth embodiment is provided on the external heat contact surface 84 of the externally connected heat exchanger 83 included in the external heat source supply device 80. The Peltier element 71 is driven by being supplied with electric power from the Peltier power supply circuit 72 provided in the charging device 70 through the wiring 73.

A case where the battery 2 is cooled in a state where the external thermal contact surface 84, the Peltier element 71, and the vehicle-mounted thermal contact surface 35 are in direct contact or indirectly in thermal contact via the heat conductive member 6 will be described. In FIG. 7, the movement of the gas heat medium when cooling the battery 2 is indicated by a broken line arrow, and the movement of the liquid heat medium is indicated by a solid arrow. When cooling the battery 2, in the Peltier element 71, the surface 711 on the vehicle-mounted thermal contact surface 35 side of the Peltier element 71 serves as the cooling surface, and the surface 712 of the Peltier element 71 on the external thermal contact surface 84 side serves as the heat dissipation surface. .. As a result, when cold heat is supplied from the externally connected heat exchanger 83 of the external heat source supply device 80 to the connected heat exchanger 30, the temperature of the external heat contact surface 84 of the externally connected heat exchanger 83 is further lowered by the Pelche element 71. At a temperature, it is possible to supply a larger amount of cold heat to the vehicle-mounted heat contact surface 35. Specifically, the temperature of the external thermal contact surface 84 ≥ the temperature of the surface 712 on the external thermal contact surface 84 side of the Peltier element 71> the temperature of the surface 711 of the Peltier element 71 on the vehicle-mounted thermal contact surface 35 side.

Next, a case will be described in which the battery 2 is warmed up in a state where the external thermal contact surface 84, the Peltier element 71, and the vehicle-mounted thermal contact surface 35 are in direct contact or indirectly in thermal contact via the heat conductive member 6. .. When the battery 2 is warmed up, in the Peltier element 71, the surface 711 of the Peltier element 71 on the vehicle-mounted thermal contact surface 35 side serves as a heat dissipation surface, and the surface 712 of the Peltier element 71 on the external thermal contact surface 84 side serves as a cooling surface. Become. As a result, when the heat is supplied from the externally connected heat exchanger 83 of the external heat source supply device 80 to the connected heat exchanger 30, the temperature of the external heat contact surface 84 of the externally connected heat exchanger 83 is further increased by the Pelche element 71. In terms of temperature, it is possible to supply a larger amount of heat to the vehicle-mounted heat contact surface 35. Specifically, the temperature of the external thermal contact surface 84 ≤ the temperature of the surface 712 on the external thermal contact surface 84 side of the Peltier element 71 <the temperature of the surface 711 of the Peltier element 71 on the vehicle-mounted thermal contact surface 35 side.

In the battery temperature control device 1 of the fourth embodiment described above, the cold heat or heat supplied from the external heat source supply device 80 to the connection heat exchanger 30 can be increased by the Peltier element 71. Therefore, the battery temperature control device 1 can enhance the temperature adjustment ability of the battery 2.

(Fifth Embodiment)
A fifth embodiment will be described with reference to FIG. In the fifth embodiment, in contrast to the fourth embodiment, the Peltier element 75 is provided on the vehicle-mounted heat contact surface 35 of the connection heat exchanger 30 instead of being provided on the external heat contact surface 84. The Peltier element 75 is driven by being supplied with electric power from a power supply circuit (not shown) provided in the vehicle 3.

In the fifth embodiment, a Peltier liquid circuit 730 for cooling the surface 752 of the Peltier element 75 opposite to the vehicle-mounted thermal contact surface 35 is provided. The Peltier liquid circuit 730 includes a Peltier heat exchanger 76, a pump 77, a pipe 78, a radiator 79, and the like. The Peltier heat exchanger 76 is provided on the surface 752 of the Peltier element 75 opposite to the vehicle-mounted heat contact surface 35.

When the pump 77 is driven, the liquid medium circulates in the Peltier liquid circuit 730. The liquid medium circulating in the Peltier liquid circuit 730 is cooled by radiating heat to the air with the radiator 79. The liquid medium flowing from the radiator 79 to the Peltier heat exchanger 76 via the pipe 78 exchanges heat with the surface 752 of the Peltier element 75 opposite to the vehicle-mounted heat contact surface 35, and cools that surface. ..

When charging the battery 2, the battery 2 is in a state where the external heat contact surface 84 of the external heat source supply device 80 and the heat exchanger 76 for Peltier are in direct contact or indirectly in thermal contact via the heat conductive member 6. The case of cooling the above will be described. In FIG. 7, the movement of the gas heat medium when cooling the battery 2 is indicated by a broken line arrow, and the movement of the liquid heat medium is indicated by a solid arrow. When cooling the battery 2, in the Peltier element 75, the surface 751 of the Peltier element 75 on the vehicle-mounted heat contact surface 35 side serves as the cooling surface, and the surface 752 of the Peltier element 75 on the Peltier heat exchanger side serves as the heat dissipation surface. .. As a result, the temperature of the external heat contact surface 84 can be further lowered by the Peltier element 75, and a larger amount of cold heat can be supplied to the vehicle-mounted heat contact surface 35. Specifically, the temperature of the external heat contact surface 84 ≧ the temperature of the Peltier heat exchanger 76 ≧ the temperature of the surface 752 on the Peltier heat exchanger side of the Peltier element 75> the temperature of the in-vehicle heat contact surface 35 of the Peltier element 75 The temperature of the surface 751.

Further, the battery temperature control device 1 of the fifth embodiment cools the battery 2 by driving the Peltier element 75 and supplying cold heat from the Peltier element 75 to the vehicle-mounted heat contact surface 35 even when the vehicle is running. Is possible. In that case as well, in the Peltier element 75, the surface 751 of the Peltier element 75 on the vehicle-mounted heat contact surface 35 side serves as the cooling surface, and the surface 752 of the Peltier element 75 on the Peltier heat exchanger side serves as the heat dissipation surface. When cold heat is supplied from the Peltier element 75 to the vehicle-mounted heat contact surface 35 when the vehicle is running, the temperature of the liquid medium flowing from the radiator 79 into the Peltier heat exchanger 76 is further lowered by the Peltier element 75 to reduce the temperature of the vehicle-mounted heat. It is possible to supply a larger amount of cold heat to the contact surface 35. Specifically, the temperature of the liquid medium flowing from the radiator 79 into the Peltier heat exchanger 76 ≥ the temperature of the surface 752 on the Peltier heat exchanger side of the Peltier element 75> the vehicle-mounted thermal contact surface 35 of the Peltier element 75. It is the temperature of the side surface 751. Therefore, the battery temperature control device 1 of the fifth embodiment can enhance the temperature adjustment ability of the battery 2.

(Sixth Embodiment)
The sixth embodiment will be described with reference to FIGS. 9 and 10. The sixth embodiment shows a control method of the battery temperature control device 1 and the charging device 70.

As shown in FIG. 9, in the vehicle 3 equipped with the battery temperature control device 1, the temperature of the battery 2 is detected by the temperature sensor 7. The temperature of the battery 2 detected by the temperature sensor 7 is transmitted to the battery control device 8 mounted on the vehicle 3. The battery control device 8 has a configuration capable of communicating with the charge control device 9 provided in the charging device 70 installed outside the vehicle 3. The charge control device 9 controls the operation of the external power supply device 90 included in the charging device 70 and the operation of the external heat source supply device 80.

The battery control device 8 is composed of a processor that performs control processing and arithmetic processing, a microcomputer that includes a storage unit such as a ROM and a RAM that stores programs and data, and peripheral circuits thereof. The storage unit of the battery control device 8 is composed of a non-transitional substantive storage medium. The battery control device 8 performs various control processes and arithmetic processes based on the program stored in the storage unit, and controls the operation of each device connected to the output port. This also applies to the charge control device 9.

The control processing performed by the battery control device 8 and the charge control device 9 will be described with reference to the flowchart of FIG. This control process is executed at the start of charging and at the time of charging. That is, in this control process, the charging connector 93 included in the external power supply device 90 is inserted into the charging port 4 provided in the vehicle 3, and the external connection heat exchanger 83 included in the external heat source supply device 80 is in-vehicle heat. It is executed in a state of being in direct contact with the contact surface 35 or indirectly in thermal contact via the heat conductive member 6.

In step S10, the battery control device 8 detects the temperature of the battery 2 by the temperature sensor 7. Next, in step S20, the battery control device 8 determines whether or not the temperature of the battery 2 is within the range of the battery temperature threshold value. The range of the battery temperature threshold is the upper limit of the temperature at which the battery 2 may deteriorate due to the high temperature of the battery 2, and the lower limit of the temperature at which the internal resistance is large due to the low temperature of the battery 2 and rapid charging is not possible. It is something to do. This battery temperature threshold value is set in advance by an experiment or the like and is stored in the storage unit of the battery control device 8. When the battery control device 8 determines that the temperature of the battery 2 is outside the range of the battery temperature threshold value, the battery control device 8 transmits this to the charge control device 9, and the process proceeds to step S50.

In step S50, the charge control device 9 performs a cooling operation or a warm-up operation of the battery 2 by the external heat source supply device 80. Specifically, when the temperature of the battery 2 is higher than the battery temperature threshold, cold heat is supplied from the external heat source supply device main body 81 to the vehicle-mounted heat contact surface 35 via the external pipe 82 and the external connection heat exchanger 83. , The cooling operation of the battery 2 is performed. On the other hand, when the temperature of the battery 2 is lower than the battery temperature threshold, heat is supplied from the external heat source supply device main body 81 to the vehicle-mounted heat contact surface 35 via the external pipe 82 and the external connection heat exchanger 83, and the battery 2 Warm-up operation is performed.
After the cooling operation or warm-up operation of the battery 2 is started in step S50, the above-mentioned control process is repeatedly executed from step S10 again while the operation is continuing. As a result, the cooling operation or the warm-up operation of the battery 2 is executed until the temperature of the battery 2 falls within the range of the battery temperature threshold value.

In step S20, when the battery control device 8 determines that the temperature of the battery 2 is within the range of the battery temperature threshold value, the battery control device 8 transmits this to the charge control device 9, and the process shifts to step S30. In step S30, the charge control device 9 performs quick charging by the external power supply device 90. Specifically, power is supplied from the external power supply device main body 91 to the battery 2 mounted on the vehicle 3 via the charging cable 92, the charging connector 93, the charging port 4, the wiring 5 inside the vehicle, and the like. As a result, the battery 2 is quickly charged.

In step S40 following step S30, the charge control device 9 performs a cooling operation of the battery 2 by the external heat source supply device 80. Specifically, cold heat is supplied from the external heat source supply device main body 81 to the vehicle-mounted heat contact surface 35 via the external pipe 82 and the external connection heat exchanger 83, and the battery 2 is cooled. The cooling operation of the battery 2 is continuously performed until the rapid charging of the battery 2 is completed. When the battery 2 is cooled, the battery control device 8 adjusts the amount of heat supplied by the external heat source supply device 80 to the connection heat exchanger 30 to the temperature of the battery 2 by communicating with the charge control device 9. It may be adjusted accordingly. As a result, the amount of cold heat corresponding to the temperature of the battery 2 is supplied from the external heat source supply device 80 to the battery temperature control device 1. Therefore, it is possible to prevent the temperature of the battery 2 from deviating from the range of the battery temperature threshold value during quick charging.

In the sixth embodiment described above, the battery control device 8 and the charge control device 9 are external heat source supply devices until the temperature of the battery 2 falls within a predetermined battery temperature threshold before starting the rapid charging of the battery 2. The 80 controls the connection heat exchanger 30 to supply cold or hot heat. Further, the battery control device 8 and the charge control device 9 control the external power supply device 90 to start rapid charging of the battery 2 after the temperature of the battery 2 reaches a predetermined battery temperature threshold range. .. This prevents the battery 2 from becoming hot and deteriorating during rapid charging. Further, even in a low temperature environment, quick charging can be performed after warming up the battery 2.

In the control process described above, in the battery control device 8, whether or not the temperature difference between the plurality of battery cells is smaller than the predetermined temperature threshold between the battery cells before the start of the rapid charging and during the rapid charging operation. May be determined. The temperature threshold between battery cells is a temperature at which the battery 2 may deteriorate due to a high temperature of some of the battery cells among the plurality of battery cells. The battery cell temperature threshold value is set in advance by an experiment or the like and is stored in the storage unit of the battery control device 8. Before the start of rapid charging, when the battery control device 8 determines that the temperature difference between the plurality of battery cells is smaller than the temperature threshold between the battery cells, the battery control device 8 transmits this to the charge control device 9, and the battery 2 by the external heat source supply device 80 Perform cooling operation or warm-up operation. As a result, it is possible to prevent the battery 2 from deteriorating due to a large temperature difference between the plurality of battery cells. During rapid charging, the battery control device 8 controls the amount of cold heat supplied from the external heat source supply device 80 to the connection heat exchanger 30 so that the temperature difference between the plurality of battery cells becomes smaller than the temperature threshold between the battery cells. This prevents the temperature difference between the plurality of battery cells from becoming large.

(7th Embodiment)
The seventh embodiment will be described with reference to FIG. A seventh embodiment describes a charging device 70 installed outside the vehicle 3. The charging device 70 includes an external power supply device 90 and an external heat source supply device 80.

The external power supply device 90 includes an external power supply device main body 91, a charging cable 92, a charging connector 93, and the like. Electric power is supplied to the external power supply device main body 91 from a power plant (not shown) via a substation 95 or the like. The charging connector 93 included in the external power supply device 90 can be inserted into the charging port 4 provided in the vehicle 3. In that state, the external power supply device 90 is connected to the battery 2 mounted on the vehicle 3 from the external power supply device main body 91 via the charging cable 92, the charging connector 93, the charging port 4, the wiring 5 inside the vehicle, and the like. Supply power. As a result, the external power supply device 90 can charge the battery 2 mounted on the vehicle 3.

The external heat source supply device 80 is installed in the charging device 70 together with the external power supply device 90. The external heat source supply device 80 supplies cold heat or heat to the battery temperature control device 1 mounted on the vehicle 3. The external heat source supply device 80 includes a heat medium circuit 800 through which a heat medium such as water, oil, or liquid nitrogen flows. The heat source control device 801 controls the operation of each configuration of the heat medium circuit 800. In the heat medium circuit 800, a pump 802, a first valve 803, a radiator 804, a chiller 805, a heat insulating tank 806, a second valve 807, an externally connected heat exchanger 83, and the like are connected by a pipe 809. The pump 802 circulates the heat medium through the heat medium circuit 800. The first valve 803 switches the flow path so that the heat medium flowing out of the pump 802 flows to the radiator 804 or the chiller 805. The radiator 804 cools the heat medium by exchanging heat between the outside air blown by the fan 810 and the heat medium. The radiator 804 is an example of a heat source unit for supplying cold heat to a heat medium.

The chiller 805 cools the heat medium by heat exchange between the low-temperature low-pressure refrigerant flowing through the refrigeration cycle 811 and the heat medium. In the refrigeration cycle 811 the refrigerant compressed by the compressor 812 is dissipated to the outside air by the condenser 813, and then decompressed and expanded by the expansion valve 814. Then, the refrigerant absorbs heat from the heat medium flowing through the chiller 805. As a result, the heat medium is cooled by heat exchange with the refrigerant circulating in the refrigeration cycle 811. Therefore, the refrigeration cycle 811 is also an example of a heat source unit for supplying cold heat to the heat medium. It is also possible to employ a Peltier element or a coolant circuit (not shown) as a heat source unit for supplying cold heat to the heat medium. The heat medium cooled by the heat source such as the radiator 804 or the refrigeration cycle 811 flows through the pipe 809 and is stored in the heat insulating tank 806.

The heat retention tank 806 can store the heat medium in a predetermined temperature state. The temperature sensor 816 detects the temperature of the heat medium stored in the heat retaining tank 806. The temperature of the heat medium of the heat retaining tank 806 detected by the temperature sensor 816 is transmitted to the heat source control device 801. The heat retaining tank 806 is set to a size capable of storing the amount of cold heat corresponding to the amount of heat generated by the battery 2 during quick charging. As a result, the external heat source supply device 80 stores the heat medium in the heat retention tank 806 in a predetermined temperature state, so that the external heat source supply device 80 requires a large capacity in a short time for adjusting the temperature of the battery 2. I can handle it from time to time.

The heat medium flowing out of the heat insulating tank 806 flows to the externally connected heat exchanger 83 via the second valve 807. The second valve 807 switches the flow path so that the heat medium flowing out of the heat insulating tank 806 flows to the externally connected heat exchanger 83 or the pump 802. The externally connected heat exchanger 83 has an external heat contact surface 84 that can be in direct contact with the vehicle-mounted heat contact surface 35 provided in the vehicle 3 or indirectly through the heat conductive member 6. The external connection heat exchanger 83 can transfer the heat supplied by the heat medium flowing through the pipe 809 and the external pipe 82 from the external heat contact surface 84 to the vehicle-mounted heat contact surface 35.

The electric power supplied to the charging device 70 is stored in the storage battery 820 for the external heat source supply device 80 separately from the external power supply device main body 91. The electric power stored in the storage battery 820 drives the pump 802 provided in the heat medium circuit 800, the fan 810 of the radiator 804, the compressor 812 and the fan 817 of the refrigeration cycle 811, the first valve 803, the second valve 807, and the like. To do. The storage battery 820 stores electric power capable of driving these devices during rapid charging. As a result, the external heat source supply device 80 can be driven by the electric power stored in the storage battery 820 even when a large amount of electric power is used for the external power supply device main body 91 during quick charging.

The charging device 70 of the seventh embodiment described above corresponds to the battery temperature control device 1 described in the first to sixth embodiments.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and can be appropriately modified within the scope of the claims. Further, the above-described embodiments are not unrelated to each other, and can be appropriately combined unless the combination is clearly impossible. Further, in each of the above embodiments, it goes without saying that the elements constituting the embodiment are not necessarily essential except when it is clearly stated that they are essential and when they are clearly considered to be essential in principle. No. Further, in each of the above embodiments, when numerical values such as the number, numerical values, amounts, and ranges of the constituent elements of the embodiment are mentioned, when it is clearly stated that they are particularly essential, and in principle, the number is clearly limited to a specific number. It is not limited to the specific number except when it is done. Further, in each of the above embodiments, when referring to the shape, positional relationship, etc. of a component or the like, the shape, unless otherwise specified or limited in principle to a specific shape, positional relationship, etc. It is not limited to the positional relationship.

(1) In another embodiment, the external heat contact surface 84 of the external connection heat exchanger 83 included in the external heat source supply device 80 and the vehicle-mounted heat contact surface 35 of the connection heat exchanger 30 included in the battery temperature control device 1 are , Not limited to those in which the entire surfaces are in thermal contact with each other. For example, the external heat contact surface 84 may be in thermal contact only with the upper portion of the vehicle-mounted heat contact surface 35 of the connection heat exchanger 30 included in the battery temperature control device 1, or the vehicle-mounted heat exchanger 30 may be in thermal contact. The external thermal contact surface 84 may be in thermal contact only with the portion below the surface 35.

(2) In another embodiment, the battery temperature control device 1 may have a configuration in which a plurality of battery heat exchangers 10 are connected to one connection heat exchanger 30 via piping. In that case, a plurality of battery heat exchangers 10 may be connected in parallel or in series with respect to one connection heat exchanger 30.

(Summary)
According to the first aspect shown in some or all of the above embodiments, the battery temperature control device is mounted on the vehicle using heat supplied from an external heat source supply device installed outside the vehicle. Adjust the temperature of the battery. The battery temperature controller includes a battery heat exchanger, piping and a connection heat exchanger. The battery heat exchanger exchanges heat between the battery and the heat medium. The piping is connected to the heat exchanger for batteries, and the heat medium flows through it. The connection heat exchanger has an in-vehicle heat contact surface capable of direct contact with the external heat contact surface of the external heat source supply device or indirectly through a heat conductive member. The connection heat exchanger cools or heats the heat medium flowing through the piping by the heat transferred from the external heat contact surface of the external heat source supply device through the vehicle-mounted heat contact surface.

According to the second aspect, the battery temperature control device further includes a pump provided in the middle of the piping. The piping has an outward passage and a return passage connecting the heat exchanger for batteries and the connection heat exchanger. The battery heat exchanger, the outward passage, the return passage, the connection heat exchanger, and the pump constitute a liquid circuit in which a liquid heat medium circulates. According to this, the battery temperature control device has a simple configuration using a liquid circuit, and the temperature of the battery mounted on the vehicle can be adjusted by using the cold heat or the heat supplied from the external heat source supply device. ..

According to a third aspect, the piping has a liquid passage and a gas passage. The liquid passage includes an outflow port provided below the liquid level of the heat medium in the heat exchanger for batteries and an outflow port provided below the liquid level of the heat medium in the connected heat exchanger. To connect. The gas passage connects the outflow port provided above the liquid level of the heat medium in the heat exchanger for batteries and the outflow port provided above the liquid level of the heat medium in the connected heat exchanger. To do. Battery heat exchanger, piping, and connection The heat exchanger constitutes a thermosiphon circuit in which a heat medium circulates. The liquid level of the heat medium circulating in the thermosiphon circuit is located in the middle of the inner flow path of the battery heat exchanger and in the middle of the inner flow path of the connection heat exchanger.

According to this, the heat medium can both evaporate and condense in the inner flow path of the battery heat exchanger. Also, in the flow path inside the connection heat exchanger, the heat medium can both evaporate and condense. Therefore, the battery temperature control device can both cool and warm the battery by the cold heat or heat transmitted from the external heat contact surface of the external heat source supply device to the connection heat exchanger via the in-vehicle heat contact surface. Is. Therefore, the battery temperature control device has a configuration with high heat transport efficiency using a thermosiphon circuit, and the temperature of the battery mounted on the vehicle can be adjusted by using the heat supplied from the external heat source supply device.

According to the fourth aspect, the battery temperature control device further includes an in-vehicle heat source unit. The in-vehicle heat source unit is mounted on a vehicle and is configured so that a heat medium flows through a pipe, and the heat medium flowing through the pipe is cooled or heated by heat exchange between the heat medium and another heat medium.

According to this, the battery temperature control device adjusts the temperature of the battery using the in-vehicle heat source as the heat supply source and supplies the external heat source according to the state of the vehicle when the battery is charged and discharged and the heat generation state of the battery. The temperature control of the battery using the device as the heat supply source can be used properly. For example, when charging a battery from an external power supply device while the vehicle is stopped, when the amount of heat generated by the battery is large, the temperature of the battery is adjusted by using both the external heat source supply device and the in-vehicle heat source unit as heat supply sources. Further, when the battery is charged from the external power supply device while the vehicle is stopped, the amount of heat generated by the battery is small, and when the occupant is in the vehicle, the battery using the external heat source supply device as the heat supply source is used. The temperature may be adjusted and the in-vehicle heat source unit may be used as a heat supply source for the vehicle interior air conditioning equipment. On the other hand, when the battery generates heat due to charging / discharging while the vehicle is running, it is possible to adjust the temperature of the battery using the in-vehicle heat source unit as the heat supply source.

According to the fifth aspect, the vehicle-mounted heat source unit includes a refrigerant radiator connected to an evaporator provided in a refrigeration cycle mounted on the vehicle, a liquid-cooled radiator connected to a liquid circuit mounted on the vehicle, and air heat dissipation. It is composed of a vessel or a Peltier element. According to this, it is possible to adopt various configurations as the in-vehicle heat source unit.

According to the sixth aspect, the battery temperature control device further includes a Peltier element provided between the external thermal contact surface and the vehicle-mounted thermal contact surface. According to this, it is possible to increase the cold heat or hot heat supplied from the external heat source supply device to the connection heat exchanger by the Peltier element. For example, when cold heat is supplied from the external heat source supply device to the connection heat exchanger, the temperature of the external heat contact surface can be set to a lower temperature by the Peltier element, and larger cold heat can be supplied to the in-vehicle heat contact surface. is there. Further, when the heat is supplied from the external heat source supply device to the connection heat exchanger, the temperature of the external heat contact surface can be set to a higher temperature by the Peltier element, and a larger heat can be supplied to the in-vehicle heat contact surface. is there. Therefore, the battery temperature control device can increase the temperature control ability of the battery.

According to the seventh aspect, the battery has a configuration that can be charged by the electric power supplied from the external electric power supply device installed outside the vehicle. The battery temperature control device includes a battery control device capable of communicating with a charge control device that controls the drive of the external power supply device and the drive of the external heat source supply device. When the battery is rapidly charged, the battery control device communicates with the charge control device so that the external heat source supply device heats or cools the connected heat exchanger until the battery temperature falls within a predetermined battery temperature threshold range. Control to supply. Further, the battery control device controls the external power supply device to start rapid charging of the battery after the battery temperature reaches a predetermined battery temperature threshold value by communicating with the charge control device.

According to this, if quick charging is performed when the temperature of the battery is high, the battery may deteriorate. On the other hand, when the temperature of the battery is low, the internal resistance of the battery becomes large and quick charging cannot be performed. Therefore, the battery control device controls to start quick charging after the temperature of the battery is set to a predetermined temperature that can be charged by using an external heat source supply device by communicating with the charge control device at the time of quick charging of the battery. To do.

According to the eighth aspect, the battery control device adjusts the amount of heat supplied from the external heat source supply device to the connection heat exchanger according to the temperature of the battery by communicating with the charge control device. According to this, the battery control device can appropriately control the amount of heat supplied from the external heat source supply device by communicating with the charge control device, and can bring the battery into a predetermined temperature range in which the battery can be charged in a short time. ..

According to the ninth aspect, the external heat source supply device installed outside the vehicle includes a pump, a heat source unit, a heat retaining tank, and an externally connected heat exchanger. The pump circulates the heat medium through the heat medium circuit. The heat source unit cools or heats the heat medium flowing through the heat medium circuit. The heat insulation tank stores the heat medium cooled or heated by the heat source portion at a predetermined temperature. The externally connected heat exchanger has an external heat contact surface that can be directly contacted with an in-vehicle heat contact surface provided on the vehicle or indirectly via a heat conductive member. The externally connected heat exchanger can transfer the heat supplied by the heat medium flowing through the heat medium circuit from the external heat contact surface to the vehicle-mounted heat contact surface.

According to this, the external heat source supply device stores the heat medium in a predetermined temperature state in the heat insulating tank, so that it can cope with the rapid charging that requires a large capacity in a short time for adjusting the temperature of the battery. be able to.

According to the tenth aspect, the external heat source supply device further includes a storage battery for storing electric power for driving the pump and the heat source unit. According to this, the external heat source supply device stores electric power in the storage battery at a time other than the time of quick charging, so that the external heat source supply device stores the electric power in the storage battery in advance even during quick charging, which requires a large amount of electric power for charging the battery. It is possible to cool the battery using electric power.

1 Battery temperature control device 2 Battery 3 Vehicle 6 Heat transfer member 10 Battery heat exchanger 21, 22 Piping 30 Connection heat exchanger 35 In-vehicle heat contact surface 80 External heat source supply device 84 External heat contact surface

Claims (8)

A battery temperature control device that adjusts the temperature of the battery (2) mounted on the vehicle by using the heat supplied from the external heat source supply device (80) installed outside the vehicle (3).
A battery heat exchanger (10) that exchanges heat between the battery and the heat medium.
Piping (21, 22) connected to the battery heat exchanger and through which a heat medium flows,
The external heat contact surface (84) has an in-vehicle heat contact surface (35) that can be directly contacted or indirectly heat-contacted via a heat conduction member (6). A battery temperature control device including a connection heat exchanger (30) that cools or heats a heat medium flowing through the pipe by heat transferred from the vehicle-mounted heat contact surface. A pump (25) provided in the middle of the pipe is further provided.
The pipe has an outward passage (213) and a return passage (214) for connecting the battery heat exchanger and the connection heat exchanger.
The battery according to claim 1, wherein the battery heat exchanger, the outward passage, the return passage, the connection heat exchanger, and the pump constitute a liquid circuit (300) in which a liquid heat medium circulates. Temperature control device. The piping
An outflow port (121) provided below the liquid level (FL1) of the heat medium in the heat exchanger for batteries, and a side below the liquid level (FL2) of the heat medium in the connected heat exchanger. A liquid passage (211) connecting the outflow port (321) provided in the
The outflow port (111) provided above the liquid level of the heat medium in the heat exchanger for batteries and the outflow port (311) provided above the liquid level of the heat medium in the connected heat exchanger. ), And has a gas passage (212).
The battery heat exchanger, the piping, and the connection heat exchanger form a thermosiphon circuit (100) in which a heat medium circulates.
The liquid levels (FL1, FL2) of the heat medium circulating in the thermosiphon circuit are located in the middle of the inner flow path of the battery heat exchanger, and in the middle of the inner flow path of the connection heat exchanger. The battery temperature control device according to claim 1, which is located in. An in-vehicle heat source unit (40) mounted on the vehicle, configured to allow a heat medium to flow through the pipe, and cooling or heating the heat medium flowing through the pipe by heat exchange between the heat medium and another heat medium is further provided. The battery temperature control device according to any one of claims 1 to 3, further comprising. The in-vehicle heat source unit includes a refrigerant radiator (42) connected to an evaporator (51) included in a refrigeration cycle (50) mounted on the vehicle, and liquid-cooled heat dissipation connected to a liquid circuit mounted on the vehicle. The battery temperature control device according to claim 4, which is composed of a device, an air radiator (41), or a Peltier element (75). The battery temperature control device according to any one of claims 1 to 5, further comprising a Peltier element (71, 75) provided between the external thermal contact surface and the vehicle-mounted thermal contact surface. The battery has a configuration that can be charged by electric power supplied from an external electric power supply device (90) installed outside the vehicle.
The battery temperature control device further includes a battery control device (8) capable of communicating with a charge control device (9) that controls the drive of the external power supply device and the drive of the external heat source supply device.
In the battery control device, when the battery is rapidly charged, the external heat source supply device is connected to the connection heat exchanger until the temperature of the battery falls within a predetermined battery temperature threshold range by communication with the charge control device. Controlled to supply cold or hot heat (S50),
Any one of claims 1 to 6 controls the external power supply device to start rapid charging of the battery after the battery temperature reaches a predetermined battery temperature threshold range (S30). The battery temperature control device described in 1. The battery control device adjusts the amount of heat supplied by the external heat source supply device to the connection heat exchanger according to the temperature of the battery by communicating with the charge control device (S40), claim 7. The battery temperature control device described.

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