JP2019040731A - Battery temperature adjustment device and external heat source-supplying device - Google Patents

Abstract

A battery temperature control device capable of adjusting the temperature of a battery using heat supplied by thermal contact from an external heat source supply device. A battery temperature control device adjusts the temperature of a battery mounted on a vehicle using heat supplied from an external heat source supply device installed outside the vehicle. The battery temperature control apparatus 1 includes a battery heat exchanger 10, pipes 21 and 22, and a connection heat exchanger 30. The battery heat exchanger 10 performs heat exchange between the battery 2 and the heat medium. The pipes 21 and 22 are connected to the battery heat exchanger 10 and a heat medium flows. The connection heat exchanger 30 has an in-vehicle thermal contact surface 35 that can be in direct contact with the external thermal contact surface 84 of the external heat source supply device 80 or indirectly in thermal contact with the heat conduction member 6. The connection heat exchanger 30 cools or heats the heat medium flowing through the pipe 21 by heat transmitted from the external heat contact surface 84 of the external heat source supply device 80 via the in-vehicle heat contact surface 35. [Selection] Figure 2

Description

  The present invention relates to a battery temperature adjustment device that adjusts the temperature of a secondary battery (hereinafter referred to as “battery”) mounted on a vehicle, and an external heat source supply device that supplies cold energy or heat to the battery temperature adjustment device. It is.

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 battery mounted on the vehicle, it has been considered to increase the value of the current flowing through the battery during rapid charging. ing. In that case, the current value that flows through the battery during rapid charging is greater than the current value that flows through the battery during vehicle travel using the electric motor. Specifically, the output during fast 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 amount of heat generated by the battery increases in proportion to the square of the current value. Therefore, when performing quick charge, it is required to sufficiently cool the battery. When the battery is cooled by using the cold generated by the refrigeration cycle used in the vehicle air conditioner, the output during charging can correspond to the battery heat generation of about 4 kW, but the output beyond that It cannot cope with the battery heat generation. When the cooling capacity of a battery cooling device mounted on a vehicle is increased to deal with battery heat generation during rapid charging, the following problems can be considered. For example, as the battery cooling device increases in size, it becomes difficult to secure a vehicle mounting space. The vehicle weight increases with the increase in the weight of the battery cooling device, and the vehicle travelable distance using the electric motor is shortened. Or it is a problem that the cost concerning a battery cooling device increases.

  In Patent Document 1, when charging a battery mounted on a vehicle, a heating medium is supplied from a charging device installed outside the vehicle to a liquid circuit provided in the vehicle, and the battery is cooled using the cold heat of the heating medium. The technology to do is described. Specifically, in this technology, when charging a battery mounted on a vehicle, a heating medium supply plug provided in a charging device installed outside the vehicle is inserted into a heating medium introduction portion of the vehicle, and the charging device The cooled heat medium is supplied to a liquid circuit provided in the vehicle. In this technique, heat is exchanged between the heat medium between the first liquid circuit to which the heat medium is supplied from the charging device and the second liquid circuit provided in the vehicle. Then, the battery is cooled by a heat medium circulating in the second liquid circuit. Thereby, in the technique of patent document 1, the battery can be cooled without increasing the cooling capacity of the battery cooling device mounted on the vehicle.

JP 2017-4777 A

  However, in the technique of Patent Document 1, the heat medium supply plug provided in the charging device at the start of charging of the battery mounted on the vehicle is inserted into the heat medium introducing portion of the vehicle, and the plug is connected to the heat of the vehicle at the end of charging. It is necessary to remove it from the medium introduction part. For this reason, foreign matter or the like may enter a liquid circuit provided in the vehicle from a connection portion between the plug for supplying the heat medium and the heat medium introducing portion of the vehicle. When the liquid circuit provided in the vehicle is clogged with the foreign matter, there is a problem that the liquid circuit is broken. In addition, if the heat medium leaks between the heat medium supply plug and the heat medium introduction part of the vehicle or if the heat medium drips, the vehicle, the charging operator, or the charging field is contaminated by the heat medium. There is a problem such as. If a flammable liquid is used for the heat medium, there is a risk of ignition.

  An object of this invention is to provide the battery temperature control apparatus which can adjust the temperature of a battery using the heat | fever supplied by the thermal contact from an external heat-source supply apparatus in view of the said point. Another object of the present invention is to provide an external heat source supply device that supplies cold energy or heat to the battery temperature control device.

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

  According to this, the heat medium cooled or heated by the connection heat exchanger by the thermal contact between the external thermal contact surface and the in-vehicle thermal contact surface flows to the battery heat exchanger through the pipe. The battery heat exchanger can cool or warm up the battery by performing heat exchange between the heat medium and the battery. For this reason, the battery temperature adjustment device does not flow into the circuit of the heat medium of the battery temperature adjustment device from the external heat source supply device as in the technique described in Patent Document 1, so the heat of the battery temperature adjustment device Foreign matters are prevented from entering the circuit of the medium. Further, since no leakage or dripping of the heat medium occurs between the external heat contact surface and the vehicle-mounted heat contact surface, it is possible to prevent the vehicle, the charging worker, or the charging field from being contaminated by the heat medium. Furthermore, the battery temperature control device adjusts the temperature of the battery mounted on the vehicle using heat supplied from an external heat source supply device installed outside the vehicle, thus increasing the weight and size 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 adjust the temperature of the battery with cleanliness, safety, and high capacity while preventing circuit failure.

The invention according to claim 9 is:
An external heat source supply device installed outside the vehicle,
A pump (802) for circulating the heat medium in the heat medium circuit (800);
A heat source section (804, 811) for cooling or heating the heat medium flowing through the heat medium circuit;
A heat retention tank (806) for storing the heat medium cooled or heated in the heat source section in a predetermined temperature state;
The vehicle has an external heat contact surface (84) that can be directly contacted with a vehicle-mounted heat contact surface provided on a vehicle or indirectly through a heat conducting member, and can supply heat supplied by a heat medium flowing through a heat medium circuit. And an external connection heat exchanger (83) capable of transmitting from the external heat contact surface to the vehicle-mounted heat contact surface.

  According to this, the external heat source supply device needs a large capacity in a short time for temperature adjustment of the battery, such as during rapid charging, by storing the heat medium in a predetermined temperature state in the heat retaining tank. It is possible to deal with cases.

  In addition, the code | symbol in the parenthesis attached | subjected to each said structure shows an example of the correspondence with the specific structure described in embodiment mentioned later.

It is a schematic diagram of the vehicle and charging device which mount the battery temperature control apparatus which concerns on 1st Embodiment. It is a circuit block diagram of the battery temperature control apparatus and charging device which concern on 1st Embodiment. It is a perspective view which shows schematic structure of the battery temperature control apparatus which concerns on 1st Embodiment. It is a circuit block diagram of the battery temperature control apparatus and charging device which concern on 1st Embodiment. It is a schematic diagram of the vehicle and charging device which mount the battery temperature control apparatus which concerns on 2nd Embodiment. It is a circuit block diagram of the battery temperature control apparatus and charging device which concern on 3rd Embodiment. It is a circuit block diagram of the battery temperature control apparatus and charging device which concern on 4th Embodiment. It is a circuit block diagram of the battery temperature control apparatus and charging device which concern on 5th Embodiment. It is a schematic diagram of the vehicle and charging device which mount the battery temperature control apparatus which concerns on 6th Embodiment. It is a flowchart which shows the control processing which a battery control apparatus and a charge control apparatus perform. 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 the following embodiments, parts that are the same or equivalent to each other will be described with the same reference numerals.

(First embodiment)
A first embodiment will be described with reference to FIGS. The battery temperature control apparatus 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 up a secondary battery (hereinafter referred to as “battery 2”) mounted on the vehicle 3 and adjusts the temperature of the battery 2.

  First, the battery 2 which the battery temperature control apparatus 1 makes a cooling object and a warming-up object is demonstrated. The large battery 2 installed in the vehicle 3 is mounted 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 is stored, under the seat of the vehicle 3 or under the trunk room. . The electric power stored in the battery 2 is supplied to the vehicle driving motor via an inverter or the like. The battery 2 is configured to be rechargeable with electric power supplied from a charging device 70 installed outside the vehicle 3. The charging device 70 may be a quick charging device capable of performing quick charging with an output of 150 kW or more, or may be a charging device with an output of 150 kW or less.

  The battery 2 self-heats during discharging such as when the vehicle is running and during charging, and during charging when electric power is supplied from the charging device 70 installed outside the vehicle 3. When the battery 2 reaches a high temperature, not only cannot a sufficient function be exhibited, but also deterioration and breakage are caused, so a cooling device for maintaining the battery 2 at a certain temperature or less is required. On the other hand, when the battery 2 is in a low temperature state, the internal resistance of the battery 2 increases and charging cannot be performed. Therefore, a warming-up device for warming up the battery 2 in a low temperature state 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. However, if the temperature of each battery cell is varied, the battery cell is unevenly deteriorated and the storage performance of the battery 2 is lowered. . This is because the input / output characteristics of the power storage device are determined in accordance with the characteristics of the most deteriorated battery cell. Therefore, in order for the battery 2 to exhibit desired performance over a long period of time, it is important to equalize the temperature so as to reduce the temperature variation among the plurality of battery cells.

  In general, a blower blowing method may be employed as another cooling device for cooling the battery 2. However, since the blower only blows air in the passenger compartment, the cooling capacity is low. Moreover, since the battery 2 is cooled by the sensible heat of the air by the blower by the blower, the temperature difference between the upstream and the downstream of the air flow becomes large, and the temperature variation among the plurality of battery cells cannot be sufficiently suppressed. From such a 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 adjustment device 1 according to the first embodiment uses cold or warm heat supplied from an external heat source supply device 80 provided in a charging device 70 installed outside the vehicle 3. This is a device capable of adjusting the temperature of the battery 2 mounted on the vehicle 3.

  The charging device 70 of this 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 provided in the external power supply device 90 can be inserted into the charging port 4 provided in the vehicle 3. In this 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 external connection heat exchanger 83 provided in the external heat source supply device 80 may be in direct contact with the in-vehicle thermal contact surface 35 provided in the vehicle 3 or indirectly in thermal contact with the heat conducting member 6. Is possible. In this 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 in-vehicle heat contact surface 35 via the external pipe 82 and the external connection heat exchanger 83. When cold heat or hot heat is supplied from the external heat source supply device 80 to the battery temperature adjustment device 1, the battery temperature adjustment device 1 uses the heat to cool or warm up the battery 2. The external heat source supply device 80 may be provided separately from the charging device 70.

  Next, the structure of the battery temperature control apparatus 1 is demonstrated. As shown in FIGS. 2 and 3, the battery temperature adjustment 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 working fluid such as HFO-1234yf or HFC-134a is used.

  The battery heat exchanger 10 includes 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 this specification, “along the direction of gravity” means that a state inclined about 30 ° with respect to the direction of gravity is included in addition to a state parallel to the direction of gravity. 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 bonded to the battery 2 with an adhesive heat-dissipating sheet (not shown). Therefore, the battery heat exchanger 10 can perform heat exchange 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 thermal contact surface 35 at a position where it can be exposed outside the vehicle. The in-vehicle thermal contact surface 35 is formed along the direction of gravity. In FIG. 3, in order to show the range of the in-vehicle thermal contact surface 35 in an easy-to-understand manner, the in-vehicle thermal contact surface 35 is hatched although it is not a cross section. In addition, it is good also as a structure which provides the cover which is not illustrated in the vehicle outer wall located in the outer side of the vehicle-mounted thermal contact surface 35, and exposes the vehicle-mounted thermal contact surface 35 outside the vehicle by opening the cover.

  The in-vehicle heat contact surface 35 is in direct contact with the external heat contact surface 84 of the external connection heat exchanger 83 provided in the external heat source supply device 80 or indirectly through the heat conducting member 6 such as a heat radiating sheet. Thermal contact is possible. The external connection heat exchanger 83 included in the external heat source supply device 80 is illustrated with respect to the vehicle 3 or the connection heat exchanger 30 in a state where the in-vehicle thermal contact surface 35 and the external thermal contact surface 84 are in thermal contact. Fixed by no clamping device etc. In the connection heat exchanger 30, the heat medium flowing inside the connection heat exchanger 30 is cooled or heated by cold or warm heat transmitted from the external heat contact surface 84 of the external heat source supply device 80 through the in-vehicle heat contact surface 35. It is comprised so that.

  The pipe 21 connects the battery heat exchanger 10 and the connection heat exchanger 30 and circulates the heat medium therebetween. Moreover, the piping 22 connects the heat exchanger 10 for batteries and the vehicle-mounted heat source part 40, and circulates a thermal medium in the meantime. In the following description, the pipe 21 that connects the battery heat exchanger 10 and the connection heat exchanger 30 is referred to as a first pipe 21. In addition, the pipe 22 that connects the battery heat exchanger 10 and the in-vehicle 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 inlet 121 provided in the lower header tank 12 of the battery heat exchanger 10 and the outflow inlet 321 provided in the lower header tank 32 of the connection heat exchanger 30. . That is, the first liquid passage 211 has an inlet / outlet port 121 provided below the heat medium liquid level FL1 in the battery heat exchanger 10 and a heat medium liquid level FL2 in the connection heat exchanger 30. An outflow inlet 321 provided on the lower side is connected. The first gas passage 212 connects the outlet / inlet 111 provided in the upper header tank 11 of the battery heat exchanger 10 and the outlet / inlet 311 provided in the upper header tank 31 of the connection heat exchanger 30. . That is, the first gas passage 212 is connected to the inlet / outlet port 111 provided above the heat medium level FL1 in the battery heat exchanger 10 and the heat medium level FL2 in the connection heat exchanger 30. An outflow inlet 311 provided on the upper side is connected. Thus, the battery heat exchanger 10, the connection heat exchanger 30, the first liquid passage 211, and the first gas passage 212 constitute the first thermosiphon circuit 100 in which the heat medium circulates.

  The in-vehicle heat source unit 40 is composed of one or more radiators. In the first embodiment, the in-vehicle 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 radiates 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. Heat exchanger. Further, the refrigerant radiator 42 exchanges heat between the heat medium flowing inside the refrigerant radiator 42 and the low-temperature and low-pressure refrigerant circulating in the refrigeration cycle 50, so that the heat of the heat medium flowing inside the refrigerant radiator 42 is obtained. Is a heat exchanger that radiates 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 traveling state of the vehicle 3. Further, the in-vehicle heat source unit 40 may be a liquid cooling radiator that exchanges heat between a liquid such as cooling water that flows in a liquid circuit (not shown) and a heat medium, instead of the air radiator 41 or the refrigerant radiator 42. . Moreover, you may comprise the vehicle-mounted heat-source part 40 by a Peltier device.

  The second pipe 22 has a second liquid passage 221 and a second gas passage 222. The second liquid passage 221 includes an inlet / outlet port 122 provided in the lower header tank 12 of the battery heat exchanger 10, an inlet / outlet port 411 provided below the air radiator 41, and a lower side of the refrigerant radiator 42. Is connected to an outflow inlet 421 provided at the bottom. The second gas passage 222 is provided on the inlet / outlet 112 provided in the upper header tank 11 of the battery heat exchanger 10, the inlet / outlet 412 provided on the upper side of the air radiator 41, and on the upper side of the refrigerant radiator 42. The outflow inlet 422 thus connected is connected. Thereby, the battery heat exchanger 10, the air radiator 41, the refrigerant radiator 42, the second liquid passage 221 and the second gas passage 222 also constitute the second thermosyphon circuit 200 in which the heat medium circulates. The first thermosiphon circuit 100 and the second thermosiphon circuit 200 are in communication, and the same heat medium circulates.

  Next, 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 gaseous heat medium is indicated by a dashed 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 performed when the battery 2 is being charged with the charging connector 93 provided 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 external connection heat exchanger 83 provided in the external heat source supply device 80 is in direct contact with the in-vehicle heat contact surface 35 or indirectly in heat contact through the heat conducting member 6. Is in state. In this state, the external heat source supply device 80 supplies cold heat from the external connection heat exchanger 83 to the in-vehicle 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. Part of the heat medium that has become a 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 by the heat medium inside the battery heat exchanger 10 is transported to the connection heat exchanger 30, the air radiator 41, and the refrigerant radiator 42 by the heat medium.

  As described above, the external thermal contact surface 84 included in the external connection heat exchanger 83 and the in-vehicle thermal contact surface 35 included in the connection heat exchanger 30 are in direct thermal contact or indirectly in thermal contact via the heat conducting 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 in-vehicle heat contact surface 35. Thereby, the heat medium of the connection heat exchanger 30 dissipates heat to the external heat contact surface 84 via the in-vehicle 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 in the air radiator 41 dissipates heat to the outside air and condenses. The heat medium that has flowed to the refrigerant radiator 42 radiates heat to the refrigerant flowing through the refrigeration cycle 50 and condenses. The heat medium that has become liquid in the air radiator 41 and the refrigerant radiator 42 flows down through the second liquid passage 221 and flows into the battery heat exchanger 10.

  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 transmitted by each device. Heat is dissipated to the heat contact surface 84, the outside air, or the refrigerant flowing through the refrigeration cycle 50. Thereby, the battery temperature control apparatus 1 of 1st Embodiment can cool the battery 2 mounted in the vehicle 3. FIG.

  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 gaseous heat medium is indicated by a dashed arrow, and the movement of the liquid heat medium is indicated by a solid arrow. Note that the movement of the heat medium shown in FIG. 4 is caused by the external connection heat exchanger 83 included in the external heat source supply device 80 being in direct contact with the in-vehicle heat contact surface 35 or indirectly through the heat conducting member 6. It is in a state of thermal contact.

  At the start of charging in a low-temperature environment, warm heat is supplied from the external heat contact surface 84 of the external heat source supply device 80 to the in-vehicle 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 in-vehicle 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 passes through the first gas passage 212 from the connection heat exchanger 30 and flows into the battery heat exchanger 10. The gaseous heat medium flowing into the battery heat exchanger 10 releases heat to the battery 2 and condenses. Thereby, 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.

  Thus, the heat supplied from the external heat contact surface 84 of the external heat source supply device 80 to the in-vehicle heat contact surface 35 is transported to the battery heat exchanger 10 by the heat medium evaporated in the connection heat exchanger 30, It is transmitted to the battery 2. Thereby, the battery temperature control apparatus 1 of 1st Embodiment can warm up the battery 2 mounted in the vehicle 3. FIG.

The battery temperature control apparatus 1 according to the first embodiment described above has the following operational effects.
(1) In the first embodiment, the connection heat exchanger 30 included in the battery temperature control device 1 is in direct contact with the external heat contact surface 84 of the external heat source supply device 80 or indirectly through the heat conducting member 6. It has the vehicle-mounted thermal contact surface 35 which can contact. The connection heat exchanger 30 cools or heats the heat medium by heat transmitted from the external heat contact surface 84 of the external heat source supply device 80 via the in-vehicle 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 in-vehicle thermal contact surface 35 flows through the first pipe 21 to the battery heat exchanger 10. The battery heat exchanger 10 can cool or warm up the battery 2 by exchanging heat between the heat medium and the battery 2. For this reason, the battery temperature adjustment device 1 does not flow into the battery temperature adjustment device 1 from the external heat source supply device 80 as in the technique described in Patent Document 1, so the heat medium of the battery temperature adjustment device 1 Foreign matter is prevented from entering the circuit. Further, since no heat medium leaks or drips between the external heat contact surface 84 and the in-vehicle heat contact surface 35, the vehicle 3, the charging operator, the charging station, or the like is prevented from being contaminated by the heat medium. Furthermore, since the battery temperature control apparatus 1 adjusts the temperature of the battery 2 using the heat supplied from the external heat source supply apparatus 80 installed outside the vehicle 3, the weight and the physique of the battery temperature control apparatus 1 are increased. It is possible to increase the cooling capacity of the battery 2 without making it. Therefore, this battery temperature control apparatus 1 can adjust the temperature of the battery 2 with cleanliness, safety, and large capacity while preventing circuit failure.

(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 through the first thermosiphon circuit 100 are located in the middle of the flow path inside the battery heat exchanger 10 and are flow paths inside the connection heat exchanger 30. Located in the middle. According to this, in the flow path inside the battery heat exchanger 10, the heat medium can perform both evaporation and condensation. Further, in the flow path inside the connection heat exchanger 30, the heat medium can perform both evaporation and condensation. Therefore, the battery temperature control device 1 cools and warms up 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 in-vehicle heat contact surface 35. It is possible to do both.

(3) In 1st Embodiment, the battery temperature control apparatus 1 is provided with the refrigerant | coolant heat radiator 42 connected to the evaporator 51 of the refrigerating cycle 50, and the air heat radiator 41 as the vehicle-mounted heat-source part 40. FIG. According to this, the battery temperature control device 1 is configured to perform battery cooling using the in-vehicle heat source unit 40 as a cold heat supply source and an external heat source in accordance with the state of the vehicle when the battery 2 is being charged / discharged and the heat generation state of the battery. Battery cooling using the supply device 80 as a cold heat 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 heat generation amount of the battery 2 is large, both the external heat source supply device 80 and the in-vehicle heat source unit 40 are used as the cold heat supply sources. Battery cooling can be performed. In this case, when the amount of heat generated by the battery 2 is small and an occupant is in the vehicle, battery cooling is performed using the external heat source supply device 80 as a cold supply source, and the refrigeration cycle 50 includes a vehicle interior air conditioner. It can also be used as a cold heat source. On the other hand, when the battery 2 is charged and discharged when the vehicle travels, it is possible to perform battery cooling using the in-vehicle heat source unit 40 as a cold supply source.

(Second Embodiment)
A 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 adjustment device 1 configures a thermosiphon circuit, as in the first embodiment. The connection heat exchanger 30 provided in the battery temperature control device 1 is provided on the upper side in the gravity direction than 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 battery heat exchanger 10. 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. Note that the in-vehicle thermal contact surface 35 of the second embodiment is also provided at a position that can be exposed outside the vehicle, as in the first embodiment. The in-vehicle heat contact surface 35 is in direct contact with the external heat contact surface 84 of the external connection heat exchanger 83 provided in the external heat source supply device 80 or indirectly through the heat conducting member 6 such as a heat radiating sheet. Thermal contact is possible. 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 via the in-vehicle 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 a 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 radiates heat to the external heat contact surface 84 via the in-vehicle 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 radiates heat to the outside air or the refrigerant flowing through the refrigeration cycle 50 and condenses. The heat medium that has become liquid by the air radiator 41 or the refrigerant radiator 42 flows through the second liquid passage 221 and flows into the battery heat exchanger 10. Thereby, the battery temperature control apparatus 1 of 2nd Embodiment can also cool the battery 2 mounted in the vehicle 3 similarly to 1st Embodiment.

(Third embodiment)
A 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 circulating in the liquid circuit.

  The battery temperature control apparatus 1 according to 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 apparatus 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. One of the first pump 25 and the second pump 26 can be omitted.

  The battery heat exchanger 10, the first pipe 21, the connection heat exchanger 30, and the first pump 25 constitute a first liquid circuit 300. The first pipe 21 has a first forward path 213 and a first return path 214 that connect the battery heat exchanger 10 and the connection heat exchanger 30. When the first pump 25 is driven, the heat medium circulates through the first liquid circuit 300.

  The battery heat exchanger 10, the second pipe 22, the on-vehicle heat source unit 40, the second pump 26 and the valve 27 constitute a second liquid circuit 400. The second pipe 22 has a second forward path 223 and a second return path 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 opened, the heat medium circulates through the second liquid circuit 400. In addition, the 1st liquid circuit 300 and the 2nd liquid circuit 400 are connected, and the same heat medium circulates.

  In FIG. 6, the movement of the heat medium when the battery temperature adjusting device 1 cools the battery 2 is indicated by an arrow. That is, the movement of the heat medium shown in FIG. 6 is performed when the battery 2 is being charged while the charging connector 93 provided in the external power supply device 90 is inserted into the charging port 4 provided in the vehicle 3. belongs to. Further, the movement of the heat medium is such that the external connection heat exchanger 83 provided in the external heat source supply device 80 is in direct contact with the in-vehicle heat contact surface 35 or indirectly in heat contact through the heat conducting member 6. In this state, cold heat is supplied from the external connection heat exchanger 83 to the in-vehicle 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 to the connection heat exchanger 30. When the valve 27 is opened and the second pump 26 is driven, the heat medium heated by the battery heat exchanger 10 passes through the second return path 224 from the battery heat exchanger 10 and passes through the air radiator 41 and the refrigerant. It flows into the radiator 42.

  As described above, the external thermal contact surface 84 included in the external connection heat exchanger 83 and the in-vehicle thermal contact surface 35 included in the connection heat exchanger 30 are in direct thermal contact or indirectly in thermal contact via the heat conducting 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 in-vehicle heat contact surface 35. Therefore, the heat medium flowing through the connection heat exchanger 30 radiates heat to the external heat contact surface 84 via the in-vehicle heat contact surface 35. The heat medium cooled by the connection heat exchanger 30 flows through the first forward path 213 and flows into the battery heat exchanger 10.

  On the other hand, the heat medium flowing through the air radiator 41 radiates heat to the outside air. The heat medium that has flowed to the refrigerant radiator 42 radiates heat to the refrigerant that flows through the refrigeration cycle 50. The heat medium cooled by the air radiator 41 and the refrigerant radiator 42 flows into the battery heat exchanger 10 from the second forward path 223.

  In this way, the heat generated from the battery 2 is transported by the heat medium from the battery heat exchanger 10 to the connection heat exchanger 30, the air radiator 41, and the refrigerant radiator 42, and in each device, external heat The heat is radiated to the refrigerant flowing through the contact surface 84, the outside air, or the refrigeration cycle 50. Thereby, the battery temperature control apparatus 1 of 3rd Embodiment can cool the battery 2 mounted in the vehicle 3. FIG.

  In addition, in 3rd Embodiment, the illustration by an arrow is abbreviate | omitted about the motion of a thermal medium when the battery temperature control apparatus 1 warms up the battery 2 of a low temperature state at the time of the charge start in a low temperature environment. At the start of charging in a low-temperature environment, warm heat is supplied from the external heat contact surface 84 of the external heat source supply device 80 to the in-vehicle heat contact surface 35 of the connection heat exchanger 30. Thereby, the heat medium flowing through the connection heat exchanger 30 absorbs heat from the in-vehicle heat contact surface 35 and the external heat contact surface 84, and the heat medium is heated in the connection heat exchanger 30. When the first pump 25 is driven, the heat medium heated by the connection heat exchanger 30 flows from the connection heat exchanger 30 through the first return passage 214 into the battery heat exchanger 10. The heat medium flowing into the battery heat exchanger 10 radiates heat to the battery 2. Thereby, the battery 2 is warmed up.

  Thus, the heat supplied from the external heat contact surface 84 of the external heat source supply device 80 to the in-vehicle heat contact surface 35 is transported to the battery heat exchanger 10 by the heat medium heated by the connection heat exchanger 30. , Transmitted to the battery 2. Thereby, the battery temperature control apparatus 1 of 3rd Embodiment can also warm up the battery 2 mounted in the vehicle 3. FIG.

  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)
A fourth embodiment will be described with reference to FIG. The fourth embodiment is different from the first embodiment in that a Peltier element 71 is provided between the external thermal contact surface 84 and the in-vehicle thermal contact surface 35. In the fourth embodiment, the external thermal contact surface 84 and the in-vehicle thermal contact surface 35 are moved by heat through the Peltier element 71. The Peltier element 71 of the fourth embodiment is provided on the external heat contact surface 84 of the external connection heat exchanger 83 provided in the external heat source supply device 80. The Peltier element 71 is driven by power supplied from a Peltier power supply circuit 72 provided in the charging device 70 through a 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 in-vehicle thermal contact surface 35 are in direct contact or indirectly in thermal contact with each other through the heat conducting member 6 will be described. In FIG. 7, the movement of the gaseous heat medium when the battery 2 is cooled is indicated by a broken line arrow, and the movement of the liquid heat medium is indicated by a solid line arrow. When the battery 2 is cooled, the Peltier element 71 includes a surface 711 on the in-vehicle thermal contact surface 35 side of the Peltier element 71 as a cooling surface, and a surface 712 of the Peltier element 71 on the external thermal contact surface 84 side as a heat dissipation surface. . Thereby, when supplying cold heat from the external connection heat exchanger 83 of the external heat source supply device 80 to the connection heat exchanger 30, the temperature of the external heat contact surface 84 of the external connection heat exchanger 83 is further lowered by the Peltier element 71. It is possible to supply larger cold heat to the in-vehicle thermal contact surface 35 in terms of temperature. Specifically, the temperature of the external thermal contact surface 84 ≧ the temperature of the surface 712 of the Peltier element 71 on the external thermal contact surface 84 side> the temperature of the surface 711 of the Peltier element 71 on the in-vehicle thermal contact surface 35 side.

  Next, a case where the battery 2 is warmed up in a state where the external thermal contact surface 84, the Peltier element 71, and the in-vehicle thermal contact surface 35 are in direct contact or indirectly in thermal contact with each other through the heat conducting member 6 will be described. . When the battery 2 is warmed up, in the Peltier element 71, the surface 711 on the in-vehicle thermal contact surface 35 side of the Peltier element 71 serves as a heat dissipation surface, and the surface 712 on the external thermal contact surface 84 side of the Peltier element 71 serves as a cooling surface. Become. Thereby, when supplying heat to the connection heat exchanger 30 from the external connection heat exchanger 83 of the external heat source supply device 80, the temperature of the external heat contact surface 84 of the external connection heat exchanger 83 is further increased by the Peltier element 71. It is possible to supply a larger temperature to the in-vehicle thermal contact surface 35 in terms of temperature. Specifically, the temperature of the external thermal contact surface 84 ≦ the temperature of the surface 712 of the Peltier element 71 on the external thermal contact surface 84 side <the temperature of the surface 711 of the Peltier element 71 on the in-vehicle thermal contact surface 35 side.

  The battery temperature control apparatus 1 according to the fourth embodiment described above can increase the cold or warm supplied from the external heat source supply device 80 to the connection heat exchanger 30 by the Peltier element 71. Therefore, the battery temperature adjusting device 1 can increase the temperature adjustment capability of the battery 2.

(Fifth embodiment)
A fifth embodiment will be described with reference to FIG. 5th Embodiment replaces with providing the Peltier element 75 in the external thermal contact surface 84 with respect to 4th Embodiment, and is provided in the vehicle-mounted thermal contact surface 35 of the connection heat exchanger 30. FIG. The Peltier element 75 is driven by power supplied from a power supply circuit (not shown) provided in the vehicle 3.

  In 5th Embodiment, the liquid circuit 730 for Peltier for cooling the surface 752 on the opposite side to the vehicle-mounted thermal contact surface 35 among the Peltier elements 75 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 a surface 752 of the Peltier element 75 opposite to the in-vehicle thermal 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 releasing heat to the air by the radiator 79. The liquid medium flowing into the Peltier heat exchanger 76 from the radiator 79 via the pipe 78 exchanges heat with the surface 752 of the Peltier element 75 opposite to the in-vehicle thermal contact surface 35, and cools the surface. .

  When the battery 2 is charged, the external heat contact surface 84 of the external heat source supply device 80 and the Peltier heat exchanger 76 are in direct contact or indirectly in thermal contact with each other via the heat conducting member 6. The case of cooling will be described. In FIG. 7, the movement of the gaseous heat medium when the battery 2 is cooled is indicated by a broken line arrow, and the movement of the liquid heat medium is indicated by a solid line arrow. When the battery 2 is cooled, the Peltier element 75 has a surface 751 on the in-vehicle heat contact surface 35 side of the Peltier element 75 serving as a cooling surface, and a surface 752 on the Peltier heat exchanger side of the Peltier element 75 serving as a 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 larger cold heat can be supplied to the in-vehicle 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 vehicle heat contact surface 35 side of the Peltier element 75. The temperature of the surface 751 of

  Furthermore, the battery temperature control apparatus 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 in-vehicle thermal contact surface 35 even when the vehicle is traveling. Is possible. Also in this case, in the Peltier element 75, the surface 751 on the in-vehicle thermal contact surface 35 side of the Peltier element 75 is a cooling surface, and the surface 752 on the Peltier heat exchanger side of the Peltier element 75 is a heat dissipation surface. When cold heat is supplied from the Peltier element 75 to the in-vehicle heat contact surface 35 when the vehicle is traveling, the temperature of the liquid medium flowing into the Peltier heat exchanger 76 from the radiator 79 is set to a lower temperature by the Peltier element 75 so that the in-vehicle heat It is possible to supply a larger amount of cold to the contact surface 35. Specifically, the temperature of the liquid medium flowing into the Peltier heat exchanger 76 from the radiator 79 ≧ the temperature of the surface 752 on the Peltier heat exchanger side of the Peltier element 75> the in-vehicle heat contact surface 35 of the Peltier element 75. The temperature of the side surface 751. Therefore, the battery temperature adjustment device 1 of the fifth embodiment can increase the temperature adjustment capability of the battery 2.

(Sixth embodiment)
A sixth embodiment will be described with reference to FIGS. 9 and 10. 6th Embodiment shows the control method of the battery temperature control apparatus 1 and the charging device 70. FIG.

  As shown in FIG. 9, the temperature of the battery 2 is detected by the temperature sensor 7 in the vehicle 3 on which the battery temperature control device 1 is mounted. 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 is configured to be able to communicate with the charge control device 9 provided in the charging device 70 installed outside the vehicle 3. The charging control device 9 controls the operation of the external power supply device 90 provided in the charging device 70 and the operation of the external heat source supply device 80.

  The battery control device 8 includes a processor that performs control processing and arithmetic processing, a microcomputer that includes a storage unit such as a ROM and RAM that stores programs and data, and peripheral circuits thereof. In addition, the memory | storage part of the battery control apparatus 8 is comprised with the non-transitional tangible 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. The same applies to the charge control device 9.

  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 provided 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 provided in the external heat source supply device 80 is installed in the vehicle-mounted heat. It is performed in a state in which the contact surface 35 is in direct contact or in indirect thermal contact with the heat conducting member 6.

  In step S <b> 10, 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. 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. To do. This battery temperature threshold value is set in advance by experiments or the like and stored in the storage unit of the battery control device 8. If the battery control device 8 determines that the temperature of the battery 2 is outside the range of the battery temperature threshold, the battery control device 8 transmits this fact to the charge control device 9, and the process proceeds to step S50.

In step S <b> 50, the charging control device 9 performs the cooling operation or warming-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 in-vehicle thermal contact surface 35 via the external pipe 82 and the external connection heat exchanger 83. Then, 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, the heat is supplied from the external heat source supply device main body 81 to the in-vehicle thermal contact surface 35 via the external pipe 82 and the external connection heat exchanger 83, and the battery 2 Is warmed up.
After the cooling operation or warm-up operation of the battery 2 is started in step S50, the above-described control process is repeatedly executed from step S10 again while the operation is continued. Thereby, 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.

  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 proceeds to step S30. In step S <b> 30, the charging 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 through the charging cable 92, the charging connector 93, the charging port 4, the wiring 5 inside the vehicle, and the like. Thereby, the battery 2 is rapidly charged.

  In step S40 following step S30, the charging control device 9 performs the 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 in-vehicle heat contact surface 35 via the external pipe 82 and the external connection heat exchanger 83, and the cooling operation of the battery 2 is performed. The cooling operation of the battery 2 is continuously performed until the quick charging of the battery 2 is completed. When performing the cooling operation of the battery 2, the battery control device 8 converts the amount of heat supplied from the external heat source supply device 80 to the connection heat exchanger 30 to the temperature of the battery 2 through communication with the charge control device 9. It may be adjusted accordingly. Thereby, 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 adjustment device 1. Accordingly, it is possible to prevent the temperature of the battery 2 from deviating from the range of the battery temperature threshold during the quick charge.

  In the sixth embodiment described above, the battery control device 8 and the charge control device 9 are configured so that the external heat source supply device is used until the temperature of the battery 2 falls within a predetermined battery temperature threshold before starting the rapid charging of the battery 2. 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 perform control so that the external power supply device 90 starts rapid charging of the battery 2 after the temperature of the battery 2 falls within a predetermined battery temperature threshold range. . Thereby, it is prevented that the battery 2 becomes high temperature and deteriorates at the time of quick charge. Moreover, rapid charging can be performed after the battery 2 is warmed up even in a low temperature environment.

  In the control process described above, the battery control device 8 determines whether or not the temperature difference between the plurality of battery cells is smaller than a predetermined inter-battery temperature threshold before starting the quick charge and during the quick charge operation. May be determined. The inter-battery temperature threshold is a temperature at which the battery 2 may deteriorate due to the high temperature of some of the battery cells. This inter-battery cell temperature threshold is set in advance by experiments or the like and stored in the storage unit of the battery control device 8. If the battery control device 8 determines that the temperature difference between the plurality of battery cells is smaller than the inter-battery temperature threshold before the start of the quick charge, the battery control device 8 transmits the fact 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. Thereby, it can prevent that the battery 2 deteriorates because the temperature difference between several battery cells becomes large. During rapid charging, the battery control device 8 controls the amount of cold 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 is smaller than the inter-battery temperature threshold. Thereby, it is prevented that the temperature difference between several battery cells becomes large.

(Seventh embodiment)
A seventh embodiment will be described with reference to FIG. In the seventh embodiment, a charging device 70 installed outside the vehicle 3 will be described. 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 apparatus main body 91 from a power station (not shown) via a substation 95 and the like. The charging connector 93 provided in the external power supply device 90 can be inserted into the charging port 4 provided in the vehicle 3. In this 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. Thereby, 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 component 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 retaining tank 806, a second valve 807, an external connection heat exchanger 83, and the like are connected by a pipe 809. The pump 802 circulates the heat medium in the heat medium circuit 800. The first valve 803 switches the flow path so that the heat medium flowing out from the pump 802 flows to the radiator 804 or the chiller 805. The radiator 804 exchanges heat between the outside air blown by the fan 810 and the heat medium, and cools the heat medium. The radiator 804 is an example of a heat source unit for supplying cold heat to the heat medium.

  The chiller 805 cools the heat medium by heat exchange between the low-temperature and 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 radiated to the outside air by the condenser 813 and then decompressed and expanded by the expansion valve 814. The refrigerant absorbs heat from the heat medium flowing through the chiller 805. Thereby, 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. In addition, it is also possible to employ | adopt the Peltier device which is not shown in figure, and a cooling fluid circuit as a heat-source part for supplying cold heat with respect to a heat medium. The heat medium cooled by the heat source unit such as the radiator 804 or the refrigeration cycle 811 flows through the pipe 809 and is stored in the heat retaining tank 806.

  The heat retaining 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 in 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 corresponding to the amount of heat generated by the battery 2 during rapid charging. As a result, the external heat source supply device 80 stores the heat medium in a predetermined temperature state in the heat retaining tank 806, thereby quickly charging the battery 2 with a large capacity in a short time for temperature adjustment. Sometimes it can respond.

  The heat medium flowing out from the heat retaining tank 806 flows to the external connection heat exchanger 83 via the second valve 807. The second valve 807 switches the flow path so that the heat medium flowing out from the heat retaining tank 806 flows to the external connection heat exchanger 83 or the pump 802. The externally connected heat exchanger 83 has an external thermal contact surface 84 that can be in direct contact with the in-vehicle thermal contact surface 35 provided in the vehicle 3 or indirectly through the heat conducting member 6. The external connection heat exchanger 83 can transmit 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 in-vehicle heat contact surface 35.

  The 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 that can drive these devices during rapid charging. Thereby, 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 rapid charging.

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

(Other embodiments)
The present invention is not limited to the embodiment described above, and can be appropriately changed within the scope described in the claims. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes. Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case. Further, in each of the above embodiments, when referring to the shape, positional relationship, etc. of the component, etc., the shape, unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to the positional relationship or the like.

  (1) In another embodiment, the external heat contact surface 84 of the external connection heat exchanger 83 provided in the external heat source supply device 80 and the in-vehicle heat contact surface 35 of the connection heat exchanger 30 provided in the battery temperature adjustment device 1 The whole surface is not limited to being in thermal contact. For example, the configuration in which the external heat contact surface 84 is in thermal contact with only the portion above the in-vehicle thermal contact surface 35 of the connection heat exchanger 30 included in the battery temperature control device 1 or the in-vehicle thermal contact of the connection heat exchanger 30 is possible. A configuration in which the external thermal contact surface 84 is in thermal contact with only the lower portion of the surface 35 may be employed.

  (2) In other embodiments, 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 a pipe. In that case, a plurality of battery heat exchangers 10 may be connected in parallel to one connection heat exchanger 30 or may be connected in series.

(Summary)
According to the first aspect shown in part 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 battery temperature. The battery temperature control apparatus includes a battery heat exchanger, piping, and a connection heat exchanger. The battery heat exchanger performs heat exchange between the battery and the heat medium. The piping is connected to the battery heat exchanger, and the heat medium flows. The connection heat exchanger has an in-vehicle thermal contact surface that can be in direct contact with the external thermal contact surface of the external heat source supply device or indirectly through a heat conducting member. The connection heat exchanger cools or heats the heat medium flowing through the pipe by heat transmitted from the external heat contact surface of the external heat source supply device through the in-vehicle heat contact surface.

  According to the 2nd viewpoint, a battery temperature control apparatus is further provided with the pump provided in the middle of piping. The pipe has an outward path and a return path that connect the battery heat exchanger and the connection heat exchanger. The battery heat exchanger, the forward path, the return path, 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 can adjust the temperature of the battery mounted on the vehicle using the cold or warm heat supplied from the external heat source supply device with a simple configuration using a liquid circuit. .

  According to the third aspect, the pipe has a liquid passage and a gas passage. The liquid passage includes an outflow inlet provided below the liquid surface of the heat medium in the battery heat exchanger, and an outflow inlet provided below the liquid surface of the heat medium in the connection heat exchanger. Connect. The gas passage connects the outflow inlet provided above the liquid level of the heat medium in the battery heat exchanger and the outflow inlet provided above the liquid level of the heat medium in the connection heat exchanger. To do. The battery heat exchanger, the piping, and the connection heat exchanger constitute a thermosiphon circuit in which the heat medium circulates. The liquid level of the heat medium circulating in the thermosiphon circuit is located in the middle of the flow path inside the battery heat exchanger and in the middle of the flow path inside the connection heat exchanger.

  According to this, the heat medium can perform both evaporation and condensation in the flow path inside the battery heat exchanger. Moreover, the heat medium can perform both evaporation and condensation in the flow path inside the connection heat exchanger. Therefore, the battery temperature control device can perform both cooling and warm-up of 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. It is. Therefore, the battery temperature control device can adjust the temperature of the battery mounted on the vehicle using the heat supplied from the external heat source supply device with a configuration with high heat transport efficiency using the thermosiphon circuit.

  According to the 4th viewpoint, a battery temperature control apparatus is further provided with a vehicle-mounted heat-source part. The in-vehicle heat source unit is mounted on the vehicle and configured to allow a heat medium to flow through the pipe, and cools or heats the heat medium flowing through the pipe 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 unit as the heat supply source and supplies the external heat source according to the state of the vehicle when charging / discharging the battery and the heat generation state of the battery. Battery temperature adjustment using the device as a heat source can be used properly. For example, when charging the battery from the external power supply device while the vehicle is stopped, if the heat generation amount of the battery is large, the temperature of the battery is adjusted using both the external heat source supply device and the in-vehicle heat source unit as the heat supply source. In addition, when charging the battery from the external power supply device while the vehicle is stopped, when the heat generation amount of the battery is small and an occupant is in the vehicle, the battery using the external heat source supply device as the heat supply source is used. Temperature adjustment may be performed and the vehicle-mounted 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 during vehicle travel, it is possible to adjust the temperature of the battery using the in-vehicle heat source unit as a heat supply source.

  According to the fifth aspect, the in-vehicle heat source unit includes a refrigerant radiator connected to an evaporator provided in a refrigeration cycle mounted on a vehicle, a liquid cooling radiator connected to a liquid circuit mounted on the vehicle, and air radiation. Or a Peltier element. According to this, it is possible to employ | adopt various structures as a vehicle-mounted heat-source part.

  According to the sixth aspect, the battery temperature control device further includes a Peltier element provided between the external thermal contact surface and the in-vehicle 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 supplying cold heat from the external heat source supply device to the connection heat exchanger, the cold temperature can be supplied to the in-vehicle heat contact surface by lowering the temperature of the external heat contact surface with a Peltier element. is there. In addition, when supplying heat 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 with the Peltier element, and larger heat can be supplied to the in-vehicle heat contact surface. is there. Therefore, the battery temperature control device can increase the temperature adjustment capability of the battery.

  According to the seventh aspect, the battery is configured to be rechargeable with electric power supplied from an external power supply device installed outside the vehicle. The battery temperature control device includes a battery control device that can communicate with a charge control device that controls driving of the external power supply device and driving of the external heat source supply device. When the battery is rapidly charged, the battery control device communicates with the charge control device until the external heat source supply device cools or heats the connected heat exchanger until the battery temperature falls within a predetermined battery temperature threshold range. Control to supply. Also, the battery control device controls the external power supply device to start rapid charging of the battery after the temperature of the battery falls within a predetermined battery temperature threshold range by communication with the charge control device.

  According to this, if rapid charging is performed when the temperature of the battery is high, the battery may be deteriorated. On the other hand, when the temperature of the battery is low, the internal resistance of the battery increases, and rapid charging cannot be performed. For this reason, the battery control device controls to start the quick charge after the battery temperature is set to a predetermined temperature that can be charged using the external heat source supply device through communication with the charge control device during the quick charge 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 through communication 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 through communication with the charge control device, and can bring the battery into a predetermined temperature range that 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 external connection heat exchanger. The pump circulates the heat medium in the heat medium circuit. The heat source unit cools or heats the heat medium flowing through the heat medium circuit. The heat retaining tank stores the heat medium cooled or heated by the heat source unit at a predetermined temperature. The externally connected heat exchanger has an external heat contact surface that can be directly contacted with a vehicle-mounted heat contact surface provided on the vehicle or indirectly heat-contacted via a heat conducting member. The external connection heat exchanger can transfer heat supplied by the heat medium flowing through the heat medium circuit from the external heat contact surface to the in-vehicle heat contact surface.

  According to this, the external heat source supply device stores a heat medium in a predetermined temperature state in a heat retaining tank, thereby responding to a quick charge that requires a large capacity in a short time to adjust the temperature of the battery. be able to.

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

DESCRIPTION OF SYMBOLS 1 Battery temperature control apparatus 2 Battery 3 Vehicle 6 Heat conduction member 10 Battery heat exchangers 21 and 22 Pipe 30 Connection heat exchanger 35 In-vehicle heat contact surface 80 External heat source supply device 84 External heat contact surface

Claims (10)

A battery temperature control device that adjusts the temperature of the battery (2) mounted on the vehicle using heat supplied from an external heat source supply device (80) installed outside the vehicle (3),
A battery heat exchanger (10) for performing heat exchange between the battery and the heat medium;
Pipes (21, 22) connected to the battery heat exchanger and through which the heat medium flows,
The external heat contact surface 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 conducting member (6). And a connection heat exchanger (30) that cools or heats the heat medium flowing through the piping by heat transmitted from the vehicle-mounted heat contact surface. A pump (25) provided in the middle of the pipe;
The pipe has an outward path (213) and a return path (214) for connecting the battery heat exchanger and the connection heat exchanger,
The battery according to claim 1, wherein the battery heat exchanger, the forward path, the return path, the connection heat exchanger, and the pump constitute a liquid circuit (300) in which a liquid heat medium circulates. Temperature control device. The piping is
Outflow inlet (121) provided below the liquid level (FL1) of the heat medium in the battery heat exchanger, and below the liquid level (FL2) of the heat medium in the connection heat exchanger. A liquid passage (211) connecting an outflow inlet (321) provided in
The outflow inlet (111) provided above the liquid level of the heat medium in the battery heat exchanger, and the outflow inlet (311) provided above the liquid level of the heat medium in the connection heat exchanger. Gas passage (212) for connecting
The battery heat exchanger, the pipe, and the connection heat exchanger constitute a thermosiphon circuit (100) in which a heat medium circulates,
The liquid level (FL1, FL2) of the heat medium circulating in the thermosiphon circuit is located in the middle of the flow path inside the battery heat exchanger, and in the middle of the flow path inside 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 and configured to flow a heat medium 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 apparatus 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 a liquid cooling heat dissipation connected to a liquid circuit mounted on the vehicle. The battery temperature control device according to claim 4, wherein the battery temperature control device is configured by a heater, 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 in-vehicle thermal contact surface. The battery is configured to be rechargeable by electric power supplied from an external 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 driving of the external power supply device and driving of the external heat source supply device,
When the battery is rapidly charged, the battery control device communicates with the charge control device until the temperature of the battery falls within a predetermined battery temperature threshold range, and the external heat source supply device is connected to the connection heat exchanger. And control to supply cold or hot (S50)
The external power supply device controls the battery to start rapid charging after the temperature of the battery falls within a predetermined battery temperature threshold range (S30). The battery temperature control apparatus as described in one.   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 through communication with the charge control device (S40). The battery temperature control apparatus as described. An external heat source supply device installed outside the vehicle,
A pump (802) for circulating the heat medium in the heat medium circuit (800);
A heat source section (804, 811) for cooling or heating the heat medium flowing through the heat medium circuit;
A heat retaining tank (806) for storing the heat medium cooled or heated in the heat source section in a predetermined temperature state;
The vehicle has an external heat contact surface (84) that can be in direct contact with a vehicle-mounted heat contact surface provided in the vehicle or indirectly through a heat conducting member, and is supplied by a heat medium flowing through the heat medium circuit. An external heat source supply device comprising: an external connection heat exchanger (83) capable of transferring heat from the external heat contact surface to the in-vehicle heat contact surface.   The external heat source supply device according to claim 9, further comprising a storage battery (820) for storing electric power for driving the pump and the heat source unit.

Images