JP2019009220A - Terminal cooling device - Google Patents

Abstract

To provide a terminal cooling device in which variation in thermal resistance between an object to be cooled and a cooler can be reduced and which has simple configuration and high cooling capacity.SOLUTION: The terminal cooling device that cools a power supply terminal 3 as an object to be cooled comprises a bus bar 31 as a heat transfer member and a cooler 11. The bus bar 31 is provided spreading over the plurality of power supply terminals 3 and is deformable in a direction intersecting the direction in which the plurality of power supply terminals 3 are arranged. The cooler 11 is directly or indirectly connected to the thickness direction-surface of the bus bar 31 and supplies cold heat to the power supply terminal 3 via the bus bar 31.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a terminal cooling device that cools a power supply terminal of a battery pack or a power supply terminal of a power supply wiring.

  In recent years, a technique using a thermosiphon circuit as a cooling device for cooling an electric device or the like mounted on an electric vehicle such as an electric vehicle or a hybrid vehicle has been studied.

  In the device temperature control apparatus described in Patent Document 1, a cooler provided on the side wall side of an assembled battery as an object to be cooled and a condenser provided above the cooler are connected by two pipes. , A thermosiphon circuit in which a working fluid is enclosed. In the thermosiphon circuit, when the battery generates heat, the working fluid inside the cooler absorbs heat from the assembled battery and evaporates, and flows into the condenser through one pipe. The condenser condenses the vapor-phase working fluid by heat exchange with a predetermined cold supply medium. The liquid-phase working fluid condensed by the condenser flows down in the other pipe by its own weight and flows into the cooler. Thus, this cooling device naturally circulates the working fluid in the thermosiphon circuit and cools the assembled battery by heat of vaporization when the working fluid boils inside the cooler.

Japanese Patent No. 5942943

  The inventors have found the following problem regarding the cooling device described in Patent Document 1. As shown in FIG. 24, the assembled battery 2 that is an object to be cooled by the cooling device includes a plurality of battery cells 4. Since the battery cell 4 encloses the battery material on the inside, the surface of the battery container may swell slightly. Therefore, when the assembled battery 2 is configured by stacking a plurality of battery cells 4, a step of about 1 mm is formed on the end surfaces of the plurality of battery cells 4, and the distances D1, D2, D3 between the plurality of battery cells 4 and the cooler 9 are provided. ... Varies. When the plurality of battery cells 4 and the cooler 9 are connected so as to be able to conduct heat with the insulating heat conductive material 5 sandwiched between the plurality of battery cells 4 and the cooler 9, the thickness of the heat conductive material 5 is: The distance between the battery cell 4 farthest from the cooler 9 and the cooler 9 is set. Therefore, when the thickness of the heat conductive material 5 increases, the thermal resistance of the heat conductive material 5 increases, and the cooling device requires a large cooling capacity. However, when the assembled battery 2 is configured as a battery module used in a vehicle or the like, the area where the assembled battery 2 can be cooled is limited, and it is difficult to increase the cooling capacity of the cooling device.

  In addition, when the heat conductive material 5 is sandwiched between the plurality of battery cells 4 and the cooler 9 in a state where the distance is varied, the heat resistance varies between a thick portion and a thin portion of the heat conductive material 5. Therefore, a difference occurs in the amount of cold heat supplied from the cooler 9 to the plurality of battery cells 4. Thereby, when a temperature difference arises in the some battery cell 4 which comprises the assembled battery 2, when charging / discharging the assembled battery 2, current concentration will generate | occur | produce in a part with high temperature, and there exists a possibility that the battery cell 4 may deteriorate. There is.

  In addition, in the said subject, although the assembled battery 2 which is the cooling target object of the cooling device of patent document 1 was demonstrated as an example, the cooling target object of this invention is not restricted to the assembled battery 2. FIG. In the present invention, a power supply terminal of an electric device such as a terminal of the assembled battery 2 or a power supply wiring terminal is an object to be cooled.

  In view of the above problems, an object of the present invention is to provide a terminal cooling device that can reduce variation in thermal resistance between an object to be cooled and a cooler and has high cooling capacity with a simple configuration.

In order to achieve the above object, the invention according to claim 1 is a terminal cooling device for cooling a power supply terminal (3) as an object to be cooled,
A plate-shaped heat transfer member (31) provided across a plurality of power supply terminals and deformable in a direction intersecting the direction in which the plurality of power supply terminals are arranged;
A cooler (11) connected directly or indirectly to the surface of the heat transfer member in the plate thickness direction and supplying cold power to the power supply terminal via the heat transfer member.

  According to this, when the heat transfer member is deformed, variations in the heights of the plurality of power supply terminals are absorbed, and the heat transfer member is connected to the cooler along the outer wall surface of the cooler. Therefore, all of the plurality of power supply terminals are connected to the cooler via the heat transfer member so as to conduct heat. In addition, when an insulating heat conductive material is sandwiched between the heat transfer member and the cooler, it is possible to reduce the thickness of the heat conductive material and reduce the thermal resistance of the heat conductive material. Therefore, this terminal cooling device can reduce variation in thermal resistance between the plurality of power supply terminals and the cooler, and can increase the cooling capacity with a simple configuration.

  Examples of the power supply terminal include a terminal provided in the assembled battery or a terminal provided on the power supply wiring. When the power supply terminal is a terminal provided in the assembled battery, the terminal cooling device uniformly supplies cold heat to the plurality of power supply terminals, thereby suppressing temperature variations of the plurality of battery cells, and removing the plurality of battery cells. Cooling can be ensured. When the power supply terminal is a terminal provided on the power supply wiring, the terminal cooling device can reliably cool the terminal with a simple configuration.

  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 disassembled perspective view of the terminal cooling device concerning a 1st embodiment. It is a side view of the terminal cooling device concerning a 1st embodiment. It is a perspective view of the heat transfer member concerning a 1st embodiment. It is explanatory drawing explaining the assembly | attachment method of the cooler which concerns on 1st Embodiment. It is explanatory drawing explaining the assembly | attachment method of the cooler which concerns on 1st Embodiment. It is a side view of the terminal cooling device concerning a 2nd embodiment. It is explanatory drawing explaining the assembly | attachment method of the cooler which concerns on 2nd Embodiment. It is explanatory drawing explaining the assembly | attachment method of the cooler which concerns on 2nd Embodiment. It is a perspective view of the heat-transfer member which concerns on 3rd Embodiment. It is explanatory drawing explaining the assembly | attachment method of the cooler which concerns on 3rd Embodiment. It is a perspective view of the heat-transfer member which concerns on 4th Embodiment. It is a perspective view of the heat-transfer member which concerns on 5th Embodiment. It is a perspective view of the heat-transfer member which concerns on 6th Embodiment. It is a perspective view of the heat-transfer member which concerns on 7th Embodiment. It is a perspective view of the heat-transfer member which concerns on 8th Embodiment. It is a side view of the terminal cooling device concerning a 9th embodiment. It is a side view of the terminal cooling device concerning a 10th embodiment. It is a disassembled perspective view of the terminal cooling device which concerns on 11th Embodiment. It is a side view of the terminal cooling device concerning an 11th embodiment. It is a side view of the terminal cooling device concerning a 12th embodiment. It is a side view of the terminal cooling device concerning a 13th embodiment. It is a side view of the terminal cooling device concerning a 14th embodiment. It is a side view of the terminal cooling device concerning a 15th embodiment. It is explanatory drawing of the conventional cooling device.

  Embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, parts that are the same or equivalent to each other are given the same reference numerals, and descriptions thereof are omitted.

(First embodiment)
The terminal cooling device 1 of this embodiment is mounted on an electric vehicle such as an electric vehicle or a hybrid vehicle. As shown in FIG. 1, the terminal cooling device 1 cools a power supply terminal 3 of a chargeable / dischargeable battery module (hereinafter referred to as “assembled battery 2”) mounted on an electric vehicle as a cooling object. .

  First, the assembled battery 2 in which the power supply terminal 3 which the terminal cooling device 1 cools is installed is demonstrated.

  The electric vehicle travels by supplying electric energy stored in a power storage device (in other words, a battery pack) including the assembled battery 2 as a main component to a motor via an inverter or the like. The assembled battery 2 self-heats when the vehicle is used such as when the vehicle is running. And if the assembled battery 2 becomes high temperature, not only a sufficient function cannot be obtained, but also deterioration and breakage are caused, so a cooling device for maintaining the temperature below a certain temperature is required.

  In addition, in the season when the outside air temperature is high such as summer, the temperature of the assembled battery 2 rises not only when the vehicle is running but also when the parking is left. In addition, the assembled battery 2 is often placed under the floor of a vehicle or under a trunk room, and although the amount of heat per unit time given to the assembled battery 2 is small, the temperature of the assembled battery 2 gradually rises due to being left for a long time. To do. If the assembled battery 2 is left in a high temperature state, the life of the assembled battery 2 is shortened. Therefore, it is desired to keep the assembled battery 2 at a low temperature, for example, by cooling the assembled battery 2 while the vehicle is left.

  Further, the assembled battery 2 includes a plurality of battery cells 4. If the temperature of the plurality of battery cells 4 varies, the deterioration of each battery cell 4 is biased, and the power storage performance of the assembled battery 2 decreases. This is because the input / output characteristics of the power storage device are determined in accordance with the characteristics of the battery cell 4 that is most deteriorated. Therefore, in order to make the assembled battery 2 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 4.

  In general, as a cooling device for cooling the assembled battery 2, a blower blower, air cooling using a refrigeration cycle, water cooling, or a direct refrigerant cooling method is employed. However, since the blower only blows air in the passenger compartment, the cooling capacity is low. Moreover, since the assembled battery 2 is cooled by the sensible heat of the air by the blower by the blower, the temperature difference between the upstream and downstream of the air flow becomes large, and the temperature variation among the plurality of battery cells 4 cannot be sufficiently suppressed. In addition, since the assembled battery 2 is cooled by sensible heat of air or water in either air cooling or water cooling, temperature variations between the battery cells 4 cannot be sufficiently suppressed. Furthermore, although the refrigeration cycle method has a high cooling capacity, driving the compressor or cooling fan of the refrigeration cycle while the vehicle is parked is not preferable because it causes an increase in power consumption and noise.

  From these backgrounds, the terminal cooling device 1 of the present embodiment employs a thermosiphon system that adjusts the temperature of the assembled battery 2 by natural circulation of the working fluid, rather than forcibly circulating the working fluid by a compressor.

  Next, the structure of the thermosiphon circuit 10 with which the terminal cooling device 1 of this embodiment is provided is demonstrated.

  As shown in FIG. 1, in the thermosiphon circuit 10, a cooler 11 and a plurality of condensers 12, 13 are connected by an outward piping 14 and a return piping 15. The thermosiphon circuit 10 is configured to be a loop type in which an outgoing pipe 14 through which a liquid-phase working fluid mainly flows and a return pipe 15 through which a gas-phase working fluid flows mainly are separated. In addition, although it confirms, each drawing is a schematic diagram and does not show the shape or size of each component.

  An arrow DR in FIG. 1 indicates the direction of gravity in a state where the terminal cooling device 1 is mounted on the vehicle. In the arrow DR, an upward arrow indicates an upper side in the gravity direction of the vehicle, and a downward arrow indicates a lower side in the gravity direction of the vehicle.

  The thermosiphon circuit 10 is filled with working fluid. The flow path in the thermosiphon circuit 10 is filled with the working fluid. In the present embodiment, for example, a fluorocarbon refrigerant such as HFO-1234yf or HFC-134a is used as the working fluid. In addition, you may use various heat media other than Freon type refrigerants, such as water and ammonia, as a working fluid. In FIG. 1 and the like, an example of the position of the liquid level of the working fluid inside the cooler 11 is indicated by a one-dot chain line with a reference symbol FL. The thermosiphon circuit 10 can cool the power supply terminal 3 of the assembled battery 2 by performing heat transfer by the phase change between the liquid phase and the gas phase of the working fluid. In FIG. 1, the direction in which the working fluid flows when the power supply terminal 3 of the assembled battery 2 is cooled is indicated by an arrow.

  The cooler 11 integrally includes, for example, a rectangular parallelepiped first cooling unit 111 and a second cooling unit 112 extending upward from the first cooling unit 111 in the gravity direction. The cooler 11 is made of metal having high thermal conductivity, for example. FIG. 2 shows a state in which the cooler 11, the assembled battery 2, the bus bar module 30, the fastening member 40, and the like shown in FIG. 1 are assembled. As shown in FIG. 2, the lower surface 113 of the cooler 11 is indirectly connected to the power supply terminal 3 of the battery cell 4 constituting the assembled battery 2 via the insulator 50 and the bus bar 31 as a heat transfer member. Yes. That is, the lower surface 113 of the cooler 11 is connected to the power supply terminal 3 of the battery cell 4 through the insulator 50 and the bus bar 31 so that heat can be transferred. Therefore, when the assembled battery 2 and the power supply terminal 3 generate heat, the heat is absorbed into the working fluid from the lower surface 113 of the cooler 11 via the bus bar 31 and the insulator 50. As a result, the liquid-phase working fluid boils inside the cooler 11. The power supply terminal 3 is cooled by the latent heat of evaporation due to the boiling of the working fluid, and the assembled battery 2 is cooled via the power supply terminal 3. Therefore, the cooler 11 can supply cold heat to the power supply terminal 3 via the bus bar 31 to cool the power supply terminal 3 and the assembled battery 2. The cooler 11 is also called an evaporator that evaporates an internal working fluid.

  As shown in FIG. 1, an inflow port 114 is provided in a lower portion of the cooler 11 in the direction of gravity. In this embodiment, the inflow port 114 is provided in the side surface of the 1st cooling part 111 which the cooler 11 has. The forward piping 14 is connected to the inflow port 114. The outward piping 14 is provided with a U-shaped portion 143 bent in a U-shape on the lower side in the gravity direction. The U-shaped portion 143 prevents the gas-phase working fluid from flowing between the cooler 11 and the condensers 12 and 13. The outward piping 14 branches in the middle of the outward piping 14 and is divided into a first outward piping 141 and a second outward piping 142. Therefore, the end of the forward piping 14 opposite to the cooler 11 is connected to the two condensers 12 and 13. One condenser 12 is a refrigerant-working fluid condenser or a water-working fluid condenser. The other condenser 13 is an air condenser.

  The refrigerant-working fluid condenser as an example of one condenser 12 is a heat exchanger that constitutes a part of a well-known refrigeration cycle or heat pump cycle (not shown). The refrigerant-working fluid condenser exchanges heat between the low-temperature and low-pressure refrigerant flowing in the refrigeration cycle or the heat pump cycle and the working fluid circulating in the thermosiphon circuit 10. The gas-phase working fluid circulating in the thermosiphon circuit 10 dissipates heat to the low-temperature and low-pressure refrigerant flowing through the refrigeration cycle or heat pump cycle in the refrigerant-working fluid condenser and condenses.

  The water-working fluid condenser as another example of the one condenser 12 is a heat exchanger constituting a part of a well-known water circuit (not shown). The water-working fluid condenser causes heat exchange between the low-temperature water flowing through the water circuit and the working fluid circulating through the thermosiphon circuit 10. The gas-phase working fluid circulating in the thermosiphon circuit 10 dissipates heat and condenses into low-temperature water flowing through the water circuit in the water-working fluid condenser.

  The air condenser as an example of the other condenser 13 is a heat exchanger that exchanges heat between the working fluid flowing through the thermosiphon circuit 10 and the air. The gas-phase working fluid flowing through the thermosiphon circuit 10 dissipates heat into the air and is condensed by the air condenser. The liquid-phase working fluid condensed by any one of the refrigerant-working fluid condenser, the water-working fluid condenser, and the air condenser flows through the forward piping 14 by its own weight and flows into the cooler 11.

  The terminal cooling device 1 may include at least one of a refrigerant-working fluid condenser, a water-working fluid condenser, and an air condenser as the condensers 12 and 13.

  An outflow port 115 is provided in the upper portion of the cooler 11 in the direction of gravity. In this embodiment, the outflow port 115 is provided in the upper side surface of the 2nd cooling part 112 which the cooler 11 has. A return pipe 15 is connected to the outlet 115. The return pipe 15 also branches in the middle of the return pipe 15 and is divided into a first return pipe 151 and a second return pipe 152. Therefore, the end of the return pipe 15 opposite to the cooler 11 is connected to the two condensers 12 and 13 described above.

  The working fluid in the vapor phase evaporated inside the cooler 11 passes through the return pipe 15 from the outlet 115 and flows into the two condensers 12 and 13. The gas phase working fluid that has flowed into the two condensers 12 and 13 is cooled and condensed by the condensers 12 and 13 that have flowed in, and then flows into the cooler 11 again through the forward piping 14. Thus, when the power supply terminal 3 of the assembled battery 2 is cooled, the working fluid circulates as shown by the arrows in FIG. In the thermosiphon circuit 10, the circulation accompanying the phase change of the working fluid is performed by natural circulation of the working fluid without requiring a driving device such as a compressor.

  The power supply terminals 3 of the assembled battery 2 that are the objects to be cooled by the terminal cooling device 1 of the present embodiment are provided in the plurality of battery cells 4 constituting the assembled battery 2. The power terminal 3 is provided on the upper surface of the battery cell 4 in the direction of gravity. The plurality of battery cells 4 are stacked and fixed by a restraining band 6 or the like. Note that the stacking direction of the plurality of battery cells 4 is substantially horizontal when the vehicle is horizontally disposed.

  A bus bar module 30 is provided on the power supply terminal 3 side of the assembled battery 2. The bus bar module 30 includes a frame member 32 made of an insulating material such as a resin, and a plurality of bus bars 31 attached to the frame member 32. The bus bar 31 is made of a plate-like metal. The bus bar 31 is provided across the plurality of power supply terminals 3 and electrically connects the plurality of power supply terminals 3.

  As shown in FIGS. 1 and 2, the power terminal 3 of each battery cell 4 is inserted into the hole 33 of the bus bar 31 and fixed with a nut 8 or the like. In this state, the bus bar module 30 is fixed on the convex portion 7 of the battery cell 4. The bus bar 31 and the power supply terminal 3 may be fixed by welding instead of fixing by the nut 8.

  Each of the plurality of bus bars 31 electrically connects the plurality of power supply terminals 3 so that the plurality of battery cells 4 are electrically connected in series. In the present embodiment, the bus bar 31 is used as a heat transfer member for transferring heat between the cooler 11 and the power supply terminal 3. That is, the heat transfer member provided in the terminal cooling device 1 of the present embodiment is the bus bar 31 provided in the bus bar module 30. The detailed configuration of the bus bar 31 will be described later.

  An insulator 50 is provided between the bus bar 31 and the cooler 11. The insulator 50 is made of a material having electrical insulation and high thermal conductivity. The insulator 50 is a heat dissipation sheet, for example. When the cooler 11 is formed of an electrically insulating material, or when the surface of the cooler 11 is covered with an electrically insulating material, the space between the bus bar 31 and the cooler 11 is not limited. The insulator 50 may be omitted. In that case, the bus bar 31 and the cooler 11 are directly connected.

  The fastening member 40 is, for example, a thin plate-like retainer, and is a member that fastens the cooler 11 and the insulator 50 to the bus bar 31 and the assembled battery 2. In FIG. 2, the fastening member 40 fixes the cooler 11 to the frame member 32 of the bus bar module 30, but the fixing method of the cooler 11 is not limited to this. For example, the fastening member 40 may fix the cooler 11 to the power supply terminal 3, fix the cooler 11 to the bus bar 31, or fix the cooler 11 to the battery cell 4. Alternatively, the cooler 11 may be fixed to an outer frame (not shown) of the assembled battery 2. The fastening member 40 may be a well-known bolt nut, clip, clamp, or the like instead of the thin plate retainer or together with the retainer.

  Then, the structure and effect | action of the bus bar 31 as a heat-transfer member with which the terminal cooling device 1 of this embodiment is provided are demonstrated.

  As shown in FIG. 3, the bus bar 31 has a plurality of holes 33 into which the power supply terminals 3 are inserted. The direction in which the plurality of holes 33 are arranged is the direction TL in which the plurality of power supply terminals 3 electrically connected by the bus bar 31 are arranged. In FIG. 3, the direction in which the plurality of power supply terminals 3 are arranged is indicated by an arrow TL, and an example of the direction intersecting the direction in which the plurality of power supply terminals 3 is arranged is indicated by an arrow TLO.

  The bus bar 31 includes a first terminal connection part 301, a second terminal connection part 302, a cooler connection part 303, and an adjustment part 304. The first terminal connection portion 301 has a hole 33 into which one power supply terminal 3 is inserted, and is a part connected to one power supply terminal 3. The second terminal connection portion 302 has a hole 33 into which the other power supply terminal 3 is inserted and is a part connected to the other power supply terminal 3.

  The cooler connection portion 303 is a portion that is directly or indirectly connected to the cooler 11. When the cooler 11 is formed of a conductive material, the cooler connection portion 303 is indirectly connected to the cooler 11 via the insulator 50. On the other hand, when the cooler 11 is formed of an insulating material, the cooler connection portion 303 may be directly connected to the cooler 11.

  The adjustment unit 304 cools the first terminal connection unit 301, the second terminal connection unit 302, and the cooling so that the positions of the first terminal connection unit 301, the second terminal connection unit 302, and the cooler connection unit 303 can be displaced. This is a part for connecting the device connecting part 303. In the present embodiment, the adjusting unit 304 has an S-shaped cross section. However, the cross-sectional shape of the adjustment unit 304 is not limited to the S shape, and may be, for example, a Z shape or a Σ shape. As a result, the bus bar 31 can be deformed in a direction TLO that intersects the direction in which the plurality of power supply terminals 3 are arranged.

  In addition, in FIG. 3, although the range of the 1st terminal connection part 301, the 2nd terminal connection part 302, the cooler connection part 303, and the adjustment part 304 is illustrated with the broken line for description, these each site | part There is no boundary, and the bus bar 31 is formed by integrating each part. Moreover, the range of the broken line is only illustrated for explanation.

  Further, the bus bar 31 according to the first embodiment includes a cooler-side slit between a portion 303 a corresponding to the first terminal connection portion 301 and a portion 303 b corresponding to the second terminal connection portion 302 in the cooler connection portion 303. 305. The cooler side slit 305 is also formed in the adjustment unit 304.

  By this cooler side slit 305, a portion 303 a corresponding to the first terminal connection portion 301 and a portion 303 b corresponding to the second terminal connection portion 302 of the cooler connection portion 303 move individually, and the outside of the cooler 11. It becomes easy to deform along the wall surface. Further, the cooler side slit 305 makes it easy for the portion 306 between the first terminal connection portion 301 and the second terminal connection portion 302 to be deformed according to the height of the power supply terminal 3. That is, the bus bar 31 of the present embodiment has a function of absorbing variations in height between the plurality of power supply terminals 3 and the cooler 11. Further, the bus bar 31 of the present embodiment has a function of absorbing variations in height among the plurality of power supply terminals 3.

  Furthermore, since the bus bar 31 of the first embodiment is not provided with a slit or the like in a portion 306 between the first terminal connection portion 301 and the second terminal connection portion 302, the first terminal connection portion 301 and the second terminal 31 are not provided. There is no increase in electrical resistance with the terminal connection portion 302. Furthermore, as for the bus bar 31 of 1st Embodiment, the cooler side slit 305 does not inhibit the thermal conductivity between the 1st terminal connection part 301, the 2nd terminal connection part 302, and the cooler connection part 303. FIG. . Therefore, the heat conductivity between the part 303a corresponding to the first terminal connection part 301 in the cooler connection part 303 and the first terminal connection part 301 is kept good, and the second terminal connection in the cooler connection part 303 is maintained. The thermal conductivity between the portion 303b corresponding to the portion 302 and the second terminal connection portion 302 can be kept good.

  4A and 5A show a state before the cooler 11 is attached to the bus bar 31. FIG. 4 and 5, the frame member 32 and the retainer of the bus bar module 30 are not shown.

  As shown in FIG. 4A, the assembled battery 2 is slightly in a direction in which the plurality of battery cells 4 intersect with each other in the stacking direction in a state where the plurality of battery cells 4 are fixed by the restraining band 6 or the like. It may be misaligned. Therefore, the distance between each battery cell 4 and the cooler 11 varies for each battery cell 4. The stacking direction of the plurality of battery cells 4 coincides with the direction TL in which the plurality of power supply terminals 3 are arranged. 4 and 5, the direction in which the plurality of power supply terminals 3 are arranged is indicated by an arrow TL, and an example of the direction intersecting the direction in which the plurality of power supply terminals 3 is arranged is indicated by an arrow TLO.

  As described above, the bus bar 31 of the present embodiment has a configuration in which the portion 306 between the first terminal connection portion 301 and the second terminal connection portion 302 is easily deformed according to the height of the power supply terminal 3. Therefore, when the bus bar 31 is fixed to the power supply terminal 3 by the nut 8, both the first terminal connection portion 301 and the second terminal connection portion 302 are in contact with the convex portions 7 of the corresponding battery cells 4. In this state, a part 303a corresponding to the first terminal connection part 301 and a part 303b corresponding to the second terminal connection part 302 in the cooler connection part 303 intersect with the direction in which the plurality of power supply terminals 3 are arranged. The height is shifted to the TLO. Of the plurality of bus bars 31, the cooler connection portions 303a and 303b of the predetermined bus bar 31 and the cooler connection portions 303a and 303b of the other bus bars 31 also intersect with the direction in which the plurality of power supply terminals 3 are arranged. The height is shifted to the TLO.

  Next, FIG. 4B and FIG. 5B show a state in which the cooler 11 is attached to the bus bar 31. The cooler 11 is attached to the bus bar 31 by the fastening member 40 such as the retainer described above. When the cooler 11 is attached to the bus bar 31, the bus bar 31 is deformed in a direction TLO intersecting the direction in which the plurality of power supply terminals 3 are arranged by the fastening force of the fastening member 40. Specifically, the cooler connection portion 303 of the bus bar 31 is displaced toward the battery cell 4 side. As a result, the bus bar 31 is insulated from the portion 303a corresponding to the first terminal connection portion 301 in the cooler connection portion 303 and the portion 303b corresponding to the second terminal connection portion 302 in the cooler connection portion 303. It will be in the state connected to the cooler 11 via the body 50. In addition, among the plurality of bus bars 31, the cooler connection portion 303 of the predetermined bus bar 31 and the cooler connection portions 303 of the other bus bars 31 are also connected to the cooler 11 via the insulator 50. Therefore, variations in the height of the plurality of power supply terminals 3 are absorbed by deformation of the bus bar 31, and the bus bar 31 is connected to the cooler 11 along the outer wall surface of the cooler 11. Therefore, the plurality of power supply terminals 3 are connected to the cooler 11 through the bus bar 31 and the insulator 50 so as to be able to transfer heat. Therefore, the terminal cooling apparatus 1 reduces the variation in thermal resistance between the plurality of power supply terminals 3 and the cooler 11, and supplies cold heat uniformly from the cooler 11 to the plurality of power supply terminals 3. Temperature variations of the plurality of battery cells 4 constituting the battery 2 can be suppressed.

  The power supply terminal 3 provided in the battery cell 4 is a part that generates a large amount of heat because the electric resistance is large in the battery cell 4. In general, the power terminal 3 provided in the battery cell 4 is welded to the positive electrode sheet and the negative electrode sheet inside the battery cell 4. Therefore, this terminal cooling apparatus 1 can cool the positive electrode sheet and the negative electrode sheet inside the battery cell 4 together with the power supply terminal 3 by cooling the power supply terminal 3 provided in the battery cell 4. . Therefore, the terminal cooling device 1 can increase the cooling capacity for the assembled battery 2.

  The terminal cooling device 1 of the present embodiment described above can exhibit the following operational effects.

  (1) In the present embodiment, the bus bar 31 provided across the plurality of power supply terminals 3 can be deformed in a direction TLO that intersects the direction in which the plurality of power supply terminals 3 are arranged. The cooler 11 is directly or indirectly connected to the surface of the bus bar 31 in the plate thickness direction, and supplies cold heat to the power supply terminal 3 via the bus bar 31.

  According to this, when the bus bar 31 is deformed, variations in the heights of the plurality of power supply terminals 3 are absorbed, and the bus bar 31 is connected to the cooler 11 along the outer wall surface of the cooler 11. . Therefore, all of the plurality of power supply terminals 3 are connected to the cooler 11 via the bus bar 31 so that heat can be transferred. Therefore, this terminal cooling device 1 reduces variation in thermal resistance between the plurality of power supply terminals 3 and the cooler 11, and supplies cold power uniformly to the plurality of power supply terminals 3 included in the assembled battery 2. Temperature variations of the plurality of battery cells 4 can be suppressed.

  (2) In the present embodiment, the cooler 11 is directly or indirectly connected to the plurality of bus bars 31.

  According to this, since the several bus-bar 31 can deform | transform, the dispersion | variation in the height of several bus-bars 31 is absorbed. Therefore, this terminal cooling device 1 can supply cold power uniformly to more power supply terminals 3. Therefore, the terminal cooling device 1 can cool the assembled battery 2 while suppressing variations in temperature of the large number of battery cells 4 constituting the assembled battery 2.

  (3) In the present embodiment, the terminal cooling device 1 is applied to the frame member 32 on which the bus bar 31 is provided, the assembled battery 2 connected to the power supply terminal 3 and the electric equipment including the outer frame, the bus bar 31 or the power supply terminal 3 and the like. On the other hand, a fastening member 40 for fastening the cooler 11 is provided.

  According to this, the bus bar 31 can be deformed by the fastening force of the fastening member 40. Therefore, the bus bar 31 can be connected to the cooler 11 along the lower surface 113 of the cooler 11.

  (4) In the present embodiment, the terminal cooling device 1 includes the insulator 50 between the cooler 11 and the bus bar 31.

  Thereby, the cooler 11 and the power supply terminal 3 can be electrically insulated. Further, since the bus bar 31 is deformed along the outer wall surface of the cooler 11, the thickness of the insulator 50 can be reduced, and the thermal resistance of the insulator 50 can be reduced. Therefore, the terminal cooling device 1 can increase the cooling capacity of the power supply terminal 3.

  (5) In the present embodiment, the bus bar 31 includes a first terminal connection portion 301, a second terminal connection portion 302, a cooler connection portion 303, and an adjustment portion 304. The adjustment unit 304 cools the first terminal connection unit 301, the second terminal connection unit 302, and the cooling so that the positions of the first terminal connection unit 301, the second terminal connection unit 302, and the cooler connection unit 303 can be displaced. The device connection unit 303 is connected.

  Thereby, the bus bar 31 can be deformed in a direction TLO that intersects the direction in which the plurality of power supply terminals 3 are arranged.

  (6) In the present embodiment, the bus bar 31 is connected to the adjustment unit 304 from between the part 303 a corresponding to the first terminal connection part 301 and the part 303 b corresponding to the second terminal connection part 302 in the cooler connection part 303. A cooler side slit 305 is provided.

  Thereby, the part 303a corresponding to the first terminal connection part 301 and the part 303b corresponding to the second terminal connection part 302 of the cooler connection part 303 individually move and follow the outer wall surface of the cooler 11. It becomes easy to deform. In addition, the portion 306 between the first terminal connection portion 301 and the second terminal connection portion 302 in the bus bar 31 is easily deformed according to the height of each power supply terminal 3. Furthermore, the electrical resistance between the first terminal connection part 301 and the second terminal connection part 302 does not increase. In addition, the thermal conductivity between the portion 303 a corresponding to the first terminal connection portion 301 in the cooler connection portion 303 and the first terminal connection portion 301 is kept good, and the second terminal connection in the cooler connection portion 303 is maintained. The thermal conductivity between the portion 303b corresponding to the portion 302 and the second terminal connection portion 302 can be kept good.

  (7) In the present embodiment, the terminal cooling device 1 cools the power supply terminal 3 provided in the battery cell 4 constituting the assembled battery 2.

  According to this, the power supply terminal 3 provided in the battery cell 4 is a site | part with a large emitted-heat amount in a battery. In general, the power terminal 3 provided in the battery cell 4 is welded to the positive electrode sheet and the negative electrode sheet inside the battery cell 4. Therefore, this terminal cooling device 1 cools the power supply terminal 3 provided in the battery cell 4, thereby cooling the power supply terminal 3 itself and cooling the positive electrode sheet and the negative electrode sheet inside the battery cell 4. Can do. Therefore, the terminal cooling device 1 can increase the cooling capacity for the assembled battery 2.

  (8) In the present embodiment, the cooler 11 provided in the terminal cooling device 1 constitutes a part of the thermosiphon circuit 10.

  Thereby, the power supply terminal 3 can be cooled by the natural circulation of the working fluid even when the vehicle is stopped. In addition, when the cooling target of the terminal cooling device 1 is the power supply terminal 3 included in the assembled battery 2, since the heat generation amount of the power supply terminal 3 is generally larger than the heat generation amount of the assembled battery 2, the boiling cooling function by the thermosiphon circuit 10 is effective Can be demonstrated. Moreover, since the cooling heat can be uniformly supplied to the plurality of bus bars 31 by the boiling cooling function of the thermosiphon circuit 10, temperature variations of the plurality of batteries constituting the assembled battery 2 can be suppressed.

  In addition, if a water-cooling type is adopted for cooling the power supply terminal, there is a concern about leakage due to water leakage. In addition, when the air cooling method is adopted for cooling the power supply terminal, there is a concern that electric leakage may occur due to accumulation of dust or the like and condensed water. On the other hand, when the thermosiphon circuit 10 is used for cooling the power supply terminal as in the terminal cooling device 1 of the present embodiment, by using an electrically insulating fluid as the working fluid of the thermosiphon circuit 10, Can dispel concerns.

  (9) In this embodiment, the bus bar 31 for electrically connecting the plurality of power supply terminals 3 is used as a heat transfer member.

  In general, the bus bar 31 is a metal plate material, and can be easily deformed by setting the plate thickness and shape. Therefore, the structure of the terminal cooling device 1 can be simplified by using the bus bar 31 as a heat transfer member.

  (10) In the present embodiment, the thermosiphon circuit 10 includes a cooler 11, condensers 12 and 13, a return line 15, and a forward line 14. In the cooler 11, the working fluid is evaporated by heat transmitted from the power supply terminal 3 through the bus bar 31. The condensers 12 and 13 dissipate and condense the working fluid. The return pipe 15 connects the outlet 115 provided on the upper side in the gravity direction of the cooler 11 and the condensers 12 and 13. The forward piping 14 connects an inlet 114 provided on the lower side in the gravity direction of the cooler 11 and the condensers 12 and 13.

  Thereby, the performance which cools the assembled battery 2 can be improved by making the thermosiphon circuit 10 into the terminal cooling device 1 into the loop type which a working fluid circulates smoothly.

(Second Embodiment)
A second embodiment will be described. In the second embodiment, the method of assembling the cooler 11 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. .

  As shown in FIG. 6, a structural member 51 having a predetermined size is provided between the cooler connection portion 303 of the bus bar 31 and the frame member 32 of the bus bar module 30. With this structural member 51, the cooler connection portion 303 included in the bus bar 31 is pressed against the cooler 11 with the insulator 50 interposed therebetween.

  FIG. 7A and FIG. 8A show a state before the cooler 11 is attached to the bus bar 31. 7 and 8, the frame member 32 of the bus bar module 30 and the retainer are not shown.

  As shown in FIG. 7A, the assembled battery 2 has a plurality of battery cells 4 fixed by a restraining band 6 or the like, and the distance between each battery cell 4 and the cooler 11 is the same for each battery cell 4. Variation has occurred.

  Similarly to the first embodiment, the bus bar 31 of the present embodiment has a configuration in which a portion 306 between the first terminal connection portion 301 and the second terminal connection portion 302 is easily deformed according to the height of the power supply terminal 3. is there. Therefore, when the bus bar 31 is fixed to the power supply terminal 3 by the nut 8, both the first terminal connection portion 301 and the second terminal connection portion 302 are in contact with the convex portions 7 of the corresponding battery cells 4. In this state, a part 303a corresponding to the first terminal connection part 301 and a part 303b corresponding to the second terminal connection part 302 in the cooler connection part 303 intersect with the direction in which the plurality of power supply terminals 3 are arranged. The height is shifted to the TLO. Of the plurality of bus bars 31, the cooler connection portion 303 of a predetermined bus bar 31 and the cooler connection portion 303 of another bus bar 31 are also high in a direction TLO that intersects the direction in which the plurality of power supply terminals 3 are arranged. Is in a state of being deviated.

  Next, FIG. 7B and FIG. 8B show a state in which the cooler 11 is attached to the bus bar 31. The cooler 11 is attached to the bus bar 31 by the fastening member 40 such as the retainer described above. Furthermore, in the present embodiment, the structural member 51 is provided between the cooler connection portion 303 of the bus bar 31 and the frame member 32 of the bus bar module 30. Due to the structural member 51, the bus bar 31 is deformed in a direction TLO that intersects the direction in which the plurality of power supply terminals 3 are arranged. Specifically, the cooler connection portion 303 of the bus bar 31 is displaced toward the cooler 11 and is pressed against the cooler 11 with the insulator 50 interposed therebetween.

  Thereby, the variation in the height of the plurality of power supply terminals 3 is absorbed by the deformation of the bus bar 31, and the bus bar 31 is connected to the cooler 11 along the outer wall surface of the cooler 11. Therefore, all of the plurality of power supply terminals 3 are connected to the cooler 11 via the bus bar 31 and the insulator 50 so as to be capable of transferring heat. Therefore, the terminal cooling device 1 of this embodiment can also have the same effects as the first embodiment.

(3rd-8th embodiment)
Third to eighth embodiments will be described. 3rd-8th embodiment changes the structure of the bus-bar 31 as a heat-transfer member with respect to 1st and 2nd embodiment, Since it is the same as that of 1st-3rd embodiment about others, Only the parts different from the first and second embodiments will be described.

(Third embodiment)
As shown in FIG. 9, the bus bar 31 of the third embodiment includes the first terminal connection part 301, the second terminal connection part 302, the cooler connection part 303, the adjustment part 304, and the cooler described in the first embodiment. A side slit 305 is provided. Furthermore, the bus bar 31 according to the third embodiment is a convex portion that is curved so as to protrude toward one side in the plate thickness direction of the bus bar 31 at a portion connecting the first terminal connection portion 301 and the second terminal connection portion 302. 307. The convex portion 307 continues between the first terminal connection portion 301 and the second terminal connection portion 302 in a direction intersecting the direction in which the first terminal connection portion 301 and the second terminal connection portion 302 are arranged. It is formed to extend. The bus bar 31 of the present embodiment can be deformed in the direction TL in which the plurality of power supply terminals 3 are arranged by having the convex portion 307.

  As described in the first embodiment, the assembled battery 2 is manufactured by fixing the plurality of battery cells 4 in the stacking direction by the restraining band 6 or the like. In the manufacturing process of the assembled battery 2, the bus bar 31 is fixed to the power supply terminal 3 provided in the battery cell 4 by the nut 8 or the like, and then the plurality of battery cells 4 are fixed to each other by the restraining band 6 or the like. The state at that time is shown in FIG. When the plurality of battery cells 4 are fixed to each other by the restraint band 6 or the like, as shown by arrows F1 and F2 in FIG. The distance between the three may change. In that case, the bus bar 31 of the present embodiment can absorb the change in the distance between the power supply terminals 3 due to the deformation of the convex portion 307. Therefore, the bus bar 31 of the present embodiment can prevent the power supply terminal 3 from being damaged. The stacking direction of the plurality of battery cells 4 substantially coincides with the direction TL in which the plurality of power supply terminals 3 are arranged.

  On the other hand, when the assembled battery 2 is disassembled and repaired, the restraint band 6 that restrains the plurality of battery cells 4 in a state where the bus bar 31 is fixed to the plurality of power supply terminals 3 may be released. In that case, the distance between the plurality of power supply terminals 3 may change due to the plurality of battery cells 4 being separated in the stacking direction. Even in that case, the bus bar 31 of the present embodiment can absorb the change in the distance between the power supply terminals 3 by the deformation of the convex portion 307. Therefore, the bus bar 31 of the present embodiment can prevent the power supply terminal 3 from being damaged.

  The bus bar 31 of the present embodiment also includes a first terminal connection portion 301, a second terminal connection portion 302, a cooler connection portion 303, an adjustment portion 304, and a cooler side slit 305. Therefore, the terminal cooling device 1 of the present embodiment can also exhibit the same effects as those of the first and second embodiments described above.

(Fourth embodiment)
As shown in FIG. 11, the bus bar 31 of the fourth embodiment does not have the cooler side slit 305 described in the first to third embodiments. Instead, the bus bar 31 of the present embodiment has a terminal-side slit 308 provided between the first terminal connection portion 301 and the second terminal connection portion 302. The terminal-side slit 308 makes it easy for the portion 306 between the first terminal connection portion 301 and the second terminal connection portion 302 to be deformed according to the height of the power supply terminal 3. Further, the cooler connecting portion 303 is easily deformed along the outer wall surface of the cooler 11. Furthermore, in this bus bar 31, the terminal-side slit 308 does not hinder the thermal conductivity between the first terminal connection part 301, the second terminal connection part 302, and the cooler connection part 303, and between them, Good thermal conductivity can be maintained.

  Similarly to the first to third embodiments, the bus bar 31 of the present embodiment also has a function of absorbing the variation in height between the plurality of power supply terminals 3 and the cooler 11 and the height between the plurality of power supply terminals 3. It has a function to absorb variations. Therefore, the terminal cooling device 1 of the present embodiment can also exhibit the same operational effects as those of the first to third embodiments described above.

(Fifth embodiment)
As shown in FIG. 12, the bus bar 31 of the fifth embodiment does not have the cooler side slit 305 and the terminal side slit 308 described in the first to fourth embodiments. Instead, the bus bar 31 of the present embodiment is provided between the first terminal connection portion 301 and the cooler connection portion 303 and between the connection portions provided between the second terminal connection portion 302 and the cooler connection portion 303. A slit 309 is provided. Due to the inter-connection portion slit 309, the portion 306 between the first terminal connection portion 301 and the second terminal connection portion 302 is easily deformed according to the height of the power supply terminal 3. Further, the cooler connecting portion 303 is easily deformed along the outer wall surface of the cooler 11. In addition, since the bus bar 31 is not provided with a slit or the like in a portion 306 between the first terminal connection portion 301 and the second terminal connection portion 302, the first terminal connection portion 301, the second terminal connection portion 302, and the like. There is no increase in electrical resistance between the two.

  Similarly to the first to fourth embodiments, the bus bar 31 of the present embodiment also has a function of absorbing the variation in height between the plurality of power supply terminals 3 and the cooler 11 and the height of the plurality of power supply terminals 3. It has a function to absorb variations. Therefore, the terminal cooling device 1 of the present embodiment can also exhibit the same functions and effects as those of the first to fourth embodiments described above.

(Sixth embodiment)
As illustrated in FIG. 13, the bus bar 31 of the sixth embodiment also includes the inter-connection portion slit 309 described in the fifth embodiment. However, in the present embodiment, the inter-connection portion slit 309 is provided inside the side end portion of the bus bar 31. In other words, the inter-connection slit 309 is not opened at the side end of the bus bar 31. Therefore, the bus bar 31 of the present embodiment has a higher thermal conductivity between the first terminal connection portion 301 and the second terminal connection portion 302 and the cooler connection portion 303 than the bus bar 31 described in the fifth embodiment. It is possible to increase. Moreover, the bus bar 31 of the present embodiment has higher rigidity than the bus bar 31 described in the fifth embodiment.

  Similarly to the first to fifth embodiments, the bus bar 31 of the present embodiment also has a function of absorbing the variation in height between the plurality of power supply terminals 3 and the cooler 11 and the height of the plurality of power supply terminals 3. It has a function to absorb variations. Therefore, the terminal cooling device 1 of this embodiment can also have the same effects as those of the first to fifth embodiments described above.

(Seventh embodiment)
As shown in FIG. 14, the bus bar 31 according to the seventh embodiment has a configuration in which the width W2 of the cooler connection portion 303 is smaller than the width W1 of the first terminal connection portion 301 and the second terminal connection portion 302. ing.

  Similarly to the first to sixth embodiments, the bus bar 31 of the present embodiment also has a function of absorbing variations in height between the plurality of power supply terminals 3 and the cooler 11 and the height of the plurality of power supply terminals 3. It has a function to absorb variations. In addition, since the bus bar 31 is not provided with a slit or the like in a portion 306 between the first terminal connection portion 301 and the second terminal connection portion 302, the first terminal connection portion 301, the second terminal connection portion 302, and the like. There is no increase in electrical resistance between the two. Therefore, the terminal cooling device 1 of this embodiment can also have the same effects as those of the first to sixth embodiments described above.

(Eighth embodiment)
As shown in FIG. 15, the bus bar 31 of the eighth embodiment also has a configuration in which the width W3 of the cooler connection portion 303 is smaller than the width W1 of the first terminal connection portion 301 and the second terminal connection portion 302. ing. However, in the present embodiment, the width W3 of the cooler connection portion 303 is larger than the width W2 of the cooler connection portion 303 described in the seventh embodiment. Therefore, the bus bar 31 of the present embodiment has a higher thermal conductivity between the first terminal connection portion 301 and the second terminal connection portion 302 and the cooler connection portion 303 than the bus bar 31 described in the seventh embodiment. It is possible to increase.

  Similarly to the first to seventh embodiments, the bus bar 31 of the present embodiment also has a function of absorbing the variation in height between the plurality of power supply terminals 3 and the cooler 11 and the height between the plurality of power supply terminals 3. It has a function to absorb variations. In addition, since the bus bar 31 is not provided with a slit or the like in a portion 306 between the first terminal connection portion 301 and the second terminal connection portion 302, the first terminal connection portion 301, the second terminal connection portion 302, and the like. There is no increase in electrical resistance between the two. Therefore, the terminal cooling device 1 of this embodiment can also have the same effects as those of the first to seventh embodiments described above.

(Ninth embodiment)
A ninth embodiment will be described. 9th Embodiment changes the structure of the cooler 11 with respect to 1st-8th Embodiment, and since it is the same as that of 1st-8th Embodiment about others, 1st-8th Embodiment and Only the different parts will be described.

  FIG. 16 shows a state where the cooler 11 is attached to the bus bar 31. However, in FIG. 16, the frame member 32 of the bus bar module 30 and the retainer are not shown. This also applies to FIGS. 17 and 19 to 23 referred to in the embodiments described later.

  As shown in FIG. 16, the cooler 11 of this embodiment includes a rectangular parallelepiped first cooling unit 111 described in the first embodiment, and a second cooling unit that extends upward from the first cooling unit 111 in the gravity direction. In addition to 112, a wall surface cooling unit 116 extending from the first cooling unit 111 to the wall surface side of the battery cell 4 is provided. The wall surface cooling unit 116 is indirectly connected to the outer wall of the battery cell 4 via the insulator 52. Therefore, the cooler 11 of this embodiment can supply cold heat from the wall surface cooling unit 116 to the outer wall of the battery cell 4 via the insulator 52. In addition, the cooler 11 of this embodiment can supply cold heat to the power supply terminal 3 via the bus bar 31 similarly to the 1st-8th embodiment mentioned above. Therefore, the terminal cooling device 1 can further increase the cooling capacity for the assembled battery 2.

(10th Embodiment)
A tenth embodiment will be described. In the tenth embodiment, the configuration of the cooler 11 is changed with respect to the first to ninth embodiments, and the other parts are the same as those in the first to ninth embodiments. Only the different parts will be described.

  As shown in FIG. 17, the cooler 11 of this embodiment includes a rectangular parallelepiped first cooling unit 111 described in the first embodiment, and a second cooling unit extending from the first cooling unit 111 upward in the gravity direction. 112. The first cooling unit 111 is provided between the outer wall of the battery cell 4 and the bus bar 31. The surface of the first cooling unit 111 on the battery cell 4 side is indirectly connected to the outer wall of the battery cell 4 via the insulator 52. The surface of the first cooling unit 111 on the bus bar 31 side is indirectly connected to the cooler connection unit 303 of the bus bar 31 via the insulator 50. Therefore, the cooler 11 of this embodiment supplies cold heat to the outer wall of the battery cell 4 from the first cooling unit 111 via the insulator 52, and from the first cooling unit 111 via the insulator 50 and the bus bar 31. Thus, it is possible to supply cold heat to the power supply terminal 3.

  Furthermore, in this embodiment, the area where the first cooling unit 111 is indirectly connected to the outer wall of the battery cell 4 via the insulator 52 is the wall surface cooling unit 116 of the cooler 11 described in the ninth embodiment. Is larger than the area indirectly connected to the outer wall of the battery cell 4 via the insulator 52. Therefore, the terminal cooling device 1 can further increase the cooling capacity for the assembled battery 2.

(Eleventh embodiment)
An eleventh embodiment will be described. 11th Embodiment changes the direction which installs the assembled battery 2 and the terminal cooling device 1 with respect to 1st-10th Embodiment, Since it is the same as that of 1st-10th Embodiment about others, Only parts different from the first to tenth embodiments will be described.

  As shown in FIG. 18, in this embodiment, the battery terminal of the assembled battery 2 is provided on the side wall of the battery cell 4. In addition, the side wall of the battery cell 4 is a wall surface of the battery cell 4 in a direction intersecting with the direction of gravity.

  The bus bar module 30 is provided on the power supply terminal 3 side of the assembled battery 2. The plurality of bus bars 31 included in the bus bar module 30 are provided across the plurality of power supply terminals 3 and electrically connect the plurality of power supply terminals 3 as in the first embodiment.

  The cooler 11 is formed in a rectangular parallelepiped shape, for example. That is, the cooler 11 of the present embodiment is configured by the first cooling unit 111 described in the first embodiment. An inlet 114 is provided in the lower part of the cooler 11 in the direction of gravity. The forward piping 14 is connected to the inflow port 114. The outward piping 14 branches in the middle of the outward piping 14 and is divided into a first outward piping 141 and a second outward piping 142. The end of the first forward piping 141 opposite to the cooler 11 is connected to a refrigerant-working fluid condenser or a water-working fluid condenser which is one condenser 12. The end of the second forward piping 142 opposite to the cooler 11 is connected to the air condenser that is the other condenser 13.

  An outflow port 115 is provided in the upper portion of the cooler 11 in the direction of gravity. A return pipe 15 is connected to the outlet 115. The return pipe 15 also branches in the middle of the return pipe 15 and is divided into a first return pipe 151 and a second return pipe 152. The end of the first return pipe 151 opposite to the cooler 11 is connected to a refrigerant-working fluid condenser or a water-working fluid condenser, which is one condenser 12. The end of the second return pipe 152 opposite to the cooler 11 is connected to the air condenser that is the other condenser 13.

  The terminal cooling device 1 may include at least one of a refrigerant-working fluid condenser, a water-working fluid condenser, and an air condenser as the condensers 12 and 13.

  Also in the thermosiphon circuit 10 of the present embodiment, when the power supply terminal 3 of the battery pack 2 is cooled, the vapor-phase working fluid evaporated inside the cooler 11 passes through the return pipe 15 from the outlet 115 and is condensed into two condensations. Flows into the vessels 12 and 13. The gas phase working fluid that has flowed into the two condensers 12 and 13 is cooled and condensed by the condensers 12 and 13 that have flowed in, and then flows into the cooler 11 again through the forward piping 14. Thus, when the power supply terminal 3 of the assembled battery 2 is cooled, the working fluid circulates as shown by the arrows in FIG.

  FIG. 19 shows a state where the cooler 11, the assembled battery 2, the bus bar 31 and the like shown in FIG. 18 are assembled. As shown in FIG. 19, the side surface of the cooler 11 is indirectly connected to the power supply terminal 3 of the battery cell 4 constituting the assembled battery 2 via the insulator 50 and the bus bar 31. That is, the side surface of the cooler 11 is connected to the power supply terminal 3 of the battery cell 4 through the insulator 50 and the bus bar 31 so that heat can be transferred. Here, the liquid level FL of the working fluid inside the cooler 11 is located above the cooler connection portion 303 of the bus bar 31 fixed to the power supply terminal 3 arranged on the upper side in the gravity direction of the assembled battery 2. It is preferable. When the assembled battery 2 and the power supply terminal 3 generate heat, the heat is absorbed by the liquid working fluid from the side surface of the cooler 11 through the bus bar 31 and the insulator 50. As a result, the liquid-phase working fluid boils inside the cooler 11. The power supply terminal 3 is cooled by the latent heat of evaporation due to the boiling of the working fluid, and the assembled battery 2 is cooled via the power supply terminal 3. Therefore, the cooler 11 can supply cold heat to the power supply terminal 3 via the bus bar 31 to cool the power supply terminal 3 and the assembled battery 2. Therefore, the terminal cooling device 1 of this embodiment can also have the same effects as the above-described first to tenth embodiments.

(Twelfth embodiment)
A twelfth embodiment will be described. 12th Embodiment changes the structure of the cooler 11 with respect to 11th Embodiment, Since others are the same as that of 11th Embodiment, only a different part from 11th Embodiment is demonstrated. .

  As shown in FIG. 20, the cooler 11 of the present embodiment extends from the first cooling portion 111 to the side wall side of the battery cell 4 in addition to the rectangular parallelepiped first cooling portion 111 described in the eleventh embodiment. A wall surface cooling unit 116 is provided. The wall surface cooling unit 116 is indirectly connected to the side wall of the battery cell 4 via the insulator 52. Therefore, the cooler 11 of this embodiment can supply cold heat from the wall surface cooling unit 116 to the side wall of the battery cell 4 via the insulator 52. Moreover, the cooler 11 of this embodiment can supply cold heat to the power supply terminal 3 via the bus bar 31 and the insulator 50 similarly to the 1st-10th embodiment mentioned above. Therefore, the terminal cooling device 1 can further increase the cooling capacity for the assembled battery 2.

(13th Embodiment)
A thirteenth embodiment will be described. The thirteenth embodiment is obtained by changing the configuration of the cooler 11 with respect to the eleventh and twelfth embodiments. The other aspects are the same as those of the eleventh and twelfth embodiments. Only portions different from the embodiment will be described.

  As shown in FIG. 21, the cooler 11 of this embodiment is formed in the rectangular parallelepiped shape described in the eleventh embodiment. The cooler 11 is provided between the side wall of the battery cell 4 and the bus bar 31. The surface of the cooler 11 on the battery cell 4 side is indirectly connected to the side wall of the battery cell 4 via the insulator 52. The surface of the first cooling unit 111 on the bus bar 31 side is indirectly connected to the cooler connection unit 303 of the bus bar 31 via the insulator 50. Therefore, the cooler 11 of this embodiment supplies cold heat from the surface on the battery cell 4 side to the outer wall of the battery cell 4 via the insulator 52, and the insulator 50 and the bus bar 31 are supplied from the surface on the bus bar 31 side. It is possible to supply cold heat to the power supply terminal 3 via

  Furthermore, in this embodiment, the area where the battery cell 4 side surface of the cooler 11 is indirectly connected to the side wall of the battery cell 4 via the insulator 52 is the same as that of the cooler 11 described in the twelfth embodiment. The wall surface cooling part 116 has a larger area than that indirectly connected to the side wall of the battery cell 4 through the insulator 52. Therefore, the terminal cooling device 1 can further increase the cooling capacity for the assembled battery 2.

(14th Embodiment)
A fourteenth embodiment will be described. The fourteenth embodiment is a modification of the first embodiment.

  As shown in FIG. 22, in the present embodiment, the heat generating device 60 is attached to the surface of the cooler 11 opposite to the assembled battery 2 via an insulator 53. The heat generating device 60 is for connecting and disconnecting a high voltage circuit from the DCDC converter, the on-vehicle charger, the battery ECU, the equalization circuit (equalization bypass discharge resistor battery monitoring unit), or the assembled battery 2, for example. SMR (System Main Relay), which is a high voltage relay. That is, the heat generating device 60 is various electric devices that are electrically connected to the plurality of power supply terminals 3 and operate by being supplied with electric power from the assembled battery 2. Note that when the case of the heat generating device 60 is formed of an electrically insulating material, the heat generating device 60 may be directly connected to the cooler 11.

  The terminal cooling device 1 of the present embodiment can cool various heat generating devices 60 in addition to the power supply terminal 3. For example, when an equalization bypass discharge resistor is cooled by the cooler 11 as the heat generating device 60, the current value can be increased and the equalization time can be shortened.

(Fifteenth embodiment)
A fifteenth embodiment is described. The fifteenth embodiment is a modification of the eleventh embodiment.

  As shown in FIG. 23, in the present embodiment as well, the heat generating device 60 is attached to the surface of the cooler 11 opposite to the assembled battery 2 via an insulator 53. Therefore, the terminal cooling device 1 of the present embodiment can also cool various heat generating devices 60 in addition to the power supply terminal 3.

(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 the above embodiments, the terminal cooling device 1 has been described as cooling the power supply terminal 3 of the assembled battery 2, but the cooling target of the terminal cooling device 1 is not limited to this. The terminal cooling device 1 may cool the power supply terminal 3 provided in power supply wiring, such as the power supply terminal 3 installed in the power supply box, for example.

  (2) In each of the above embodiments, the terminal cooling device 1 has been described as cooling the power supply terminal 3 that is an object to be cooled by the cooler 11 configuring the thermosiphon circuit 10, but the terminal cooling device 1 is provided. The cooler 11 is not limited to this. The cooler 11 provided in the terminal cooling device 1 may be, for example, a heat exchanger provided in a refrigeration cycle or a heat pump cycle, or a heat exchanger provided in a cooling water circuit in which cold water circulates. Also good. Alternatively, the cooler 11 included in the terminal cooling device 1 may be one that cools the power supply terminal 3 using oil or air as a heat medium, or may be configured by a Peltier element.

  (3) In each of the above embodiments, the bus bar 31 is used as a heat transfer member for performing heat transfer between the cooler 11 and the power supply terminal 3, but the heat transfer member included in the terminal cooling device 1 is provided in the bus bar 31. Not exclusively. The heat transfer member provided in the terminal cooling device 1 may be any member that has good thermal conductivity and can be deformed. That is, the heat transfer member provided in the terminal cooling device 1 and the bus bar for electrical connection between the terminals can be configured as separate members.

  (4) In each of the above embodiments, the bus bar 31 as the heat transfer member and the power supply terminal 3 are fixed by the nut 8, but the fixing method of the heat transfer member and the power supply terminal 3 is not limited to this. For example, the heat transfer member and the power supply terminal 3 may be fixed by welding. Alternatively, the heat transfer member and the power terminal 3 may be integrally formed.

  (5) In each of the embodiments described above, the bus bar 31 as the heat transfer member has been described as connecting the two power supply terminals 3, but the number of the power supply terminals 3 to which the heat transfer member is connected is not limited thereto. The heat transfer member may connect three or more power supply terminals 3.

  (6) In each of the above embodiments, the battery cell 4 constituting the assembled battery 2 has been described as a square type. However, the shape of the battery cell 4 is not limited to this, and for example, a laminate type or a cylindrical type. May be.

  (7) In the tenth and thirteenth embodiments described above, the configuration in which the cooler 11 is disposed between the heat transfer member and the battery cell 4 has been described. For example, a smoke exhaust duct may be interposed.

  (8) In the above embodiment, the terminal cooling device 1 has been described as cooling the power supply terminal 3 by the cooler 11, but the operation of the terminal cooling device 1 is not limited to this. For example, the terminal cooling device 1 may be configured to warm up the assembled battery 2 by installing a heater in the thermosiphon circuit 10 and supplying warm heat from the cooler 11 to the power supply terminal 3.

(Summary)
According to the 1st viewpoint shown by one part or all part of the above-mentioned embodiment, the terminal cooling device which cools the power supply terminal as a cooling target object is provided with a heat-transfer member and a cooler. The plate-shaped heat transfer member is provided across a plurality of power supply terminals and can be deformed in a direction intersecting the direction in which the plurality of power supply terminals are arranged. The cooler is directly or indirectly connected to the surface of the heat transfer member in the plate thickness direction, and supplies cold heat to the power supply terminal via the heat transfer member.

  According to the second aspect, the terminal cooling apparatus includes a plurality of heat transfer members. The cooler is directly or indirectly connected to the plurality of heat transfer members.

  According to this, since the several heat-transfer member can deform | transform, the dispersion | variation in the height of several heat-transfer members is absorbed. Therefore, this terminal cooling device can supply cold heat uniformly to more power supply terminals. Therefore, this terminal cooling device can cool the assembled battery while suppressing variations in temperature of a large number of battery cells constituting the assembled battery.

  According to the third aspect, the terminal cooling device includes a fastening member. The fastening member deforms the heat transfer member by fastening a cooler to the frame member on which the heat transfer member is disposed, the electrical equipment connected to the power supply terminal, the heat transfer member or the power supply terminal. .

  According to this, the heat transfer member can be deformed by the fastening force of the fastening member. Therefore, the heat transfer member can be connected to the cooler along the outer wall surface of the cooler.

  According to the 4th viewpoint, a terminal cooling device is provided with the insulator provided between a cooler and a heat-transfer member.

  Thereby, it is possible to insulate a cooler and a power supply terminal. Further, since the heat transfer member is deformed along the outer wall surface of the cooler, it is possible to reduce the thickness of the insulator and reduce the thermal resistance of the insulator. Therefore, the terminal cooling device can increase the cooling capacity of the power supply terminal.

  According to the 5th viewpoint, a heat-transfer member has a 1st terminal connection part, a 2nd terminal connection part, a cooler connection part, and an adjustment part. The first terminal connection portion is connected to one power supply terminal. The second terminal connection portion is connected to the other power supply terminal. The cooler connection is connected directly or indirectly to the cooler. The adjustment unit connects the first terminal connection unit, the second terminal connection unit, and the cooler connection unit so that the positions of the first terminal connection unit, the second terminal connection unit, and the cooler connection unit can be displaced, respectively. To do.

  Thus, the heat transfer member can be deformed in a direction intersecting the direction in which the plurality of power supply terminals are arranged.

  According to the sixth aspect, the heat transfer member is a convex shape curved so as to protrude toward one side in the plate thickness direction of the heat transfer member at a portion connecting the first terminal connection portion and the second terminal connection portion. Part.

  Thereby, the heat transfer member can be deformed in the direction in which the plurality of power supply terminals are arranged. Therefore, after assembling the heat transfer member to the plurality of power supply terminals, when the plurality of battery cells provided with the power supply terminals are restrained, the heat transfer member absorbs the change in the distance between the power supply terminals. It is possible. Therefore, the heat transfer member can prevent the power supply terminal from being damaged.

  In addition, when the heat transfer member is assembled to a plurality of power supply terminals, such as when the battery pack is disassembled and repaired, the heat transfer member is also connected between the power supply terminals. It is possible to absorb changes in distance. Therefore, the heat transfer member can prevent the power supply terminal from being damaged.

  According to the seventh aspect, the heat transfer member is a cooler provided between the portion corresponding to the first terminal connection portion and the portion corresponding to the second terminal connection portion of the cooler connection portion to the adjustment portion. Has side slits.

  Thereby, the site | part between a 1st terminal connection part and a 2nd terminal connection part among heat transfer members becomes easy to deform | transform according to the height of each power supply terminal. Moreover, the site | part corresponding to a 1st terminal connection part among the cooler connection parts and the site | part corresponding to a 2nd terminal connection part move separately, and become easy to deform | transform along the outer wall surface of a cooler. Moreover, it can prevent that the electrical resistance between a 1st terminal connection part and a 2nd terminal connection part increases. Furthermore, the thermal conductivity between the part corresponding to the first terminal connection part and the first terminal connection part in the cooler connection part is kept good, and the part corresponding to the second terminal connection part in the cooler connection part And the thermal conductivity between the second terminal connection portion can be kept good.

  According to the 8th viewpoint, a heat-transfer member has a terminal side slit provided between a 1st terminal connection part and a 2nd terminal connection part.

  Thereby, while the part between the 1st terminal connection part and the 2nd terminal connection part among heat transfer members becomes easy to change according to the height of a power terminal, a cooler connection part is on the outer wall surface of a cooler. It becomes easy to deform along. Further, an increase in thermal resistance between a portion corresponding to the first terminal connection portion and the first terminal connection portion among the cooler connection portions is prevented, and a portion corresponding to the second terminal connection portion among the cooler connection portions and It is possible to prevent an increase in thermal resistance between the second terminal connection portion.

  According to the ninth aspect, the heat transfer member includes slits between connection portions provided between the first terminal connection portion and the cooler connection portion, and between the second terminal connection portion and the cooler connection portion. Have.

  Thereby, while the part between the 1st terminal connection part and the 2nd terminal connection part among heat transfer members becomes easy to change according to the height of a power terminal, a cooler connection part is on the outer wall surface of a cooler. It becomes easy to deform along. Moreover, it can prevent that the electrical resistance between a 1st terminal connection part and a 2nd terminal connection part increases among heat transfer members.

  According to the 10th viewpoint, the width | variety of a cooler connection part is smaller than the width | variety which the heat-transfer member combined the 1st terminal connection part and the 2nd terminal connection part.

  Thereby, while the part between the 1st terminal connection part and the 2nd terminal connection part among heat transfer members becomes easy to change according to the height of a power terminal, a cooler connection part is on the outer wall surface of a cooler. It becomes easy to deform along. Moreover, it can prevent that the electrical resistance between a 1st terminal connection part and a 2nd terminal connection part increases among heat transfer members.

  According to the eleventh aspect, the heat transfer member is a bus bar for electrically connecting a plurality of power supply terminals.

  Generally, a bus bar is a metal plate, and can be easily deformed by setting the plate thickness and shape. Therefore, the configuration of the terminal cooling device can be simplified by using the bus bar as the heat transfer member.

  According to the 12th viewpoint, the power supply terminal as a cooling target object is a terminal provided in the battery cell which comprises an assembled battery.

  According to this, the terminal provided in the battery cell is a part with a large calorific value in the battery. In general, terminals provided in the battery cell are welded to the positive electrode sheet and the negative electrode sheet inside the battery cell. Therefore, this terminal cooling device can cool the terminal itself by cooling the terminal provided in the battery cell, and can cool the positive electrode sheet and the negative electrode sheet inside the battery cell.

  According to the thirteenth aspect, in the cooler, the predetermined part is directly or indirectly connected to the surface in the plate thickness direction of the heat transfer member, and the other part is directly or indirectly connected to the surface of the battery cell. Connected to each other.

  According to this, the cooler can supply cold heat from a predetermined part to the power supply terminal via the heat transfer member, and can supply cold heat to the surface of the battery cell from another part. . Therefore, this terminal cooling device can enhance the cooling capacity for the assembled battery.

  According to the fourteenth aspect, the cooler is disposed between the heat transfer member and the battery cell.

  According to this, the cooler can supply cold heat from the surface on the heat transfer member side to the power supply terminal via the heat transfer member and also supply cold heat from the surface on the battery cell side to the surface of the battery cell. It is possible. Therefore, this terminal cooling device can further increase the cooling capacity for the assembled battery.

  According to the fifteenth aspect, the terminal cooling device includes a thermosiphon circuit having a flow path through which the working fluid flows. The cooler constitutes a part of the thermosiphon circuit, and the working fluid absorbs and evaporates the heat transmitted from the power supply terminal via the heat transfer member, and cools the power supply terminal by the latent heat of vaporization of the working fluid. It is.

  Thereby, the power supply terminal can be cooled by the natural circulation of the working fluid even when the vehicle is stopped. In addition, when the cooling target of the terminal cooling device is a power supply terminal included in the assembled battery, since the heat generation amount of the power supply terminal is generally larger than the heat generation amount of the assembled battery, the boiling cooling function by the thermosiphon circuit can be effectively exhibited. . Moreover, since the cooling heat can be uniformly supplied to the plurality of heat transfer members by the boiling cooling function of the thermosiphon circuit, temperature variations of the plurality of batteries constituting the assembled battery can be suppressed.

  In addition, if a water-cooling type is adopted for cooling the power supply terminal, there is a concern about leakage due to water leakage. In addition, when the air cooling method is adopted for cooling the power supply terminal, there is a concern that electric leakage may occur due to accumulation of dust or the like and condensed water. On the other hand, when a thermosiphon circuit is employed for cooling the power supply terminal as in this terminal cooling device, the use of an electrically insulating fluid as the working fluid of the thermosiphon circuit can eliminate the fear of leakage. it can.

  According to the sixteenth aspect, the thermosiphon circuit has a cooler, a condenser, a return pipe, and a forward pipe. In the cooler, the working fluid evaporates due to heat transmitted from the power supply terminal through the heat transfer member. The condenser radiates and condenses the working fluid. The return pipe connects the outlet and the condenser provided in the upper part of the cooler in the direction of gravity. The forward piping connects an inlet and a condenser provided at a lower part in the gravity direction of the cooler.

  Thereby, the terminal cooling device can improve the performance which cools an assembled battery by making a thermosiphon circuit into the loop type which a working fluid circulates smoothly.

  According to the seventeenth aspect, the cooler is directly or indirectly connected to the heat generating device electrically connected to the plurality of power supply terminals, and can supply cold heat to the heat generating device.

  Thereby, the terminal cooling device can cool various heat generating devices in addition to the power supply terminal. For example, when an equalization bypass discharge resistor is cooled by a cooler as a heat generating device, the current value can be increased and the equalization time can be shortened.

1 Terminal cooling device 3 Power supply terminal 11 Cooler 31 Bus bar

Claims (17)

A terminal cooling device for cooling a power supply terminal (3) as a cooling object,
A plate-shaped heat transfer member (31) provided across the plurality of power supply terminals and deformable in a direction intersecting the direction in which the plurality of power supply terminals are arranged;
A terminal cooling device comprising: a cooler (11) that is directly or indirectly connected to a surface of the heat transfer member in a plate thickness direction and supplies cold power to the power supply terminal via the heat transfer member. The terminal cooling device includes a plurality of the heat transfer members,
The terminal cooling device according to claim 1, wherein the plurality of heat transfer members are directly or indirectly connected to the cooler.   The terminal cooling device fastens the cooler to a frame member (32) in which the heat transfer member is disposed, an electric device (4) connected to the power supply terminal, the heat transfer member or the power supply terminal. The terminal cooling device according to claim 1 or 2, further comprising a fastening member (40) for deforming the heat transfer member by doing so.   The said terminal cooling device is a terminal cooling device as described in any one of Claim 1 thru | or 3 further provided with the insulator (50, 52, 53) provided between the said cooler and the said heat-transfer member. The heat transfer member is
A first terminal connection (301) connected to one of the power terminals;
A second terminal connection (302) connected to the other power supply terminal;
A cooler connection (303) connected directly or indirectly to the cooler;
The first terminal connection portion, the second terminal connection portion, and the cooler connection portion so that the positions of the first terminal connection portion, the second terminal connection portion, and the cooler connection portion can be displaced, respectively. The terminal cooling device according to any one of claims 1 to 4, further comprising an adjustment unit (304) for connecting the two.   The heat transfer member is a convex portion (307) that is curved so as to protrude toward one side in the plate thickness direction of the heat transfer member at a portion connecting the first terminal connection portion and the second terminal connection portion. The terminal cooling device according to claim 5, further comprising:   The heat transfer member extends from between the portion (303a) corresponding to the first terminal connection portion and the portion (303b) corresponding to the second terminal connection portion of the cooler connection portion to the adjustment portion. The terminal cooling device according to claim 5 or 6, further comprising a cooler side slit (305) provided.   The terminal cooling device according to claim 5, wherein the heat transfer member further includes a terminal side slit (308) provided between the first terminal connection portion and the second terminal connection portion.   The heat transfer member includes an inter-connection slit (309) provided between the first terminal connection portion and the cooler connection portion and between the second terminal connection portion and the cooler connection portion. Furthermore, the terminal cooling device of Claim 5 or 6.   The said heat-transfer member is a width | variety (W2, W3) of the said cooler connection part smaller than the width | variety (W1) which match | combined the said 1st terminal connection part and the said 2nd terminal connection part. Terminal cooling device.   The terminal cooling device according to any one of claims 1 to 10, wherein the heat transfer member is a bus bar for electrically connecting the plurality of power supply terminals.   The terminal cooling device according to any one of claims 1 to 11, wherein the power supply terminal as a cooling object is a terminal provided in a battery cell (4) constituting the assembled battery (2).   In the cooler, a predetermined part is directly or indirectly connected to a surface in the plate thickness direction of the heat transfer member, and another part is directly or indirectly connected to an outer wall of the battery cell. The terminal cooling device according to claim 12, which has a configuration.   The terminal cooler according to claim 12 or 13, wherein the cooler is disposed between the heat transfer member and the battery cell. The terminal cooling device includes a thermosiphon circuit (10) having a flow path through which a working fluid flows,
The cooler constitutes a part of the thermosyphon circuit, and the working fluid absorbs and evaporates the heat transmitted from the power supply terminal through the heat transfer member, and the power supply by the latent heat of vaporization of the working fluid The terminal cooling device according to any one of claims 1 to 14, wherein the terminal is cooled. The thermosiphon circuit is:
The cooler in which a working fluid is evaporated by heat transmitted from the power supply terminal through the heat transfer member;
Condensers (12, 13) for radiating and condensing the working fluid;
Outlet piping (14) connecting the condenser and the inflow port (114) provided in the lower part of the cooler in the gravity direction;
The terminal cooling device according to claim 15, further comprising a return pipe (15) that connects an outlet (115) provided in a portion on the upper side in the gravity direction of the cooler and the condenser.   The cooler is directly or indirectly connected to a heat generating device (60) electrically connected to a plurality of the power supply terminals, and can supply cold heat to the heat generating device. The terminal cooling device as described in any one.

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