Temperature controller

Abstract

To provide a temperature controller with high assembly efficiency and high thermal insulation performance between cells.SOLUTION: A temperature controller 30 includes a first flat plate portion 37 and a second flat plate portion 38 disposed facing each other along a first direction X, provided between the side surfaces of two adjacent cells 12 along the first direction X, a plurality of connecting walls 80 connecting the first flat plate portion 37 and the second flat plate portion 38, respectively, and a plate-shaped insulating material 90 arranged to connect the plurality of connecting walls 80 along a second direction Y intersecting the first direction X. A recessed portion 81 sandwiching the insulating material 90 is provided on the inner surface of the plurality of connecting walls 80.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a temperature regulator capable of regulating the temperature of a battery. [Background technology]

[0002] In recent years, automobiles equipped with motors as a driving source (such as hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), battery electric vehicles (BEVs), and fuel cell electric vehicles (FCEVs)) have become widespread. These automobiles (hereinafter collectively referred to as "electric vehicles") are equipped with batteries (hereinafter simply referred to as batteries) for driving the motors.

[0003] Typically, batteries installed in electric vehicles are configured by housing a battery module, each of which has multiple cells arranged side by side, in a container. Therefore, when the battery is used, heat is generated and trapped inside the container, causing it to reach a high temperature. When a battery reaches a high temperature, it is more likely to deteriorate. Therefore, technologies for cooling batteries have been studied (see, for example, Patent Document 1).

[0004] Patent Document 1 describes a thermal control sheet for a battery assembly. This thermal control sheet for a battery assembly is provided between cells in the battery assembly and includes a pair of plate-shaped members and a heat insulating material sandwiched between the pair of plate-shaped members. The pair of plate-shaped members have multiple protrusions formed on their surfaces facing the cells that protrude toward the cells. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2022-141507 Summary of the Invention [Problem to be solved by the invention]

[0006] As described above, the thermal control sheet for a battery assembly described in Patent Document 1 further includes a heat insulating material sandwiched between a pair of plate-like members provided between the cells. This prevents thermal runaway from occurring in one cell, preventing heat transfer to adjacent cells and preventing further thermal runaway. For example, when regulating the temperature of a battery, a possible configuration is to provide a flow path inside the plate-like member and circulate a fluid through this flow path to regulate the temperature. In such a configuration, if a heat insulating material is sandwiched between the pair of plate-like members, as in the thermal control sheet for a battery assembly described in Patent Document 1, misalignment between the plate-like members and the heat insulating material may occur, reducing the insulating performance between the cells or increasing the number of parts, resulting in reduced assembly efficiency. Therefore, the thermal control sheet for a battery assembly described in Patent Document 1 leaves room for improvement.

[0007] Therefore, there is a demand for a temperature regulator that is easy to assemble and has high insulating performance between cells. [Means for solving the problem]

[0008] A characteristic configuration of the temperature regulator of the present invention is that it is a temperature regulator that adjusts the temperature of a battery having a battery module with a plurality of cells arranged along a first direction, and includes a first flat plate portion and a second flat plate portion that are provided between side surfaces of two adjacent cells along the first direction and face each other along the first direction, a plurality of connecting walls that connect each of the first flat plate portion and the second flat plate portion, and plate-shaped insulating material that is arranged to connect the plurality of connecting walls along a second direction that intersects the first direction, and recesses that sandwich the insulating material are provided on the inner surfaces of the plurality of connecting walls.

[0009] With this characteristic configuration, the insulating material is sandwiched and supported in the recess, thereby isolating the area sandwiched between the first and second flat plate portions from the outside of the temperature controller. Therefore, for example, when a fluid is circulated through the area sandwiched between the first and second flat plate portions, the fluid is prevented from leaking to the outside, and the insulating material can improve the thermal insulation performance between the cells. Furthermore, by forming a recess in the connecting wall, the heat transfer area of ​​the connecting wall is reduced, thereby reducing heat conduction in the connecting wall. Therefore, it is possible to suppress heat conduction from one of two adjacent cells to the other in the connecting wall. Furthermore, because the insulating material is simply sandwiched and supported in the recess, there is no increase in the number of parts, and assembly efficiency is high. As such, the temperature controller of this configuration has high assembly efficiency and high thermal insulation performance between the cells. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a plan view of a battery using a temperature regulator. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Figure 3] 2 is a cross-sectional view of the temperature controller taken along a first direction. FIG. [Figure 4] 10 is a cross-sectional view of a temperature regulator according to another embodiment. [Figure 5] 10 is a cross-sectional view of a temperature regulator according to another embodiment. [Figure 6] 10 is a cross-sectional view of a temperature regulator according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of a temperature controller according to the present invention will be described with reference to the drawings. Note that the embodiments described below are merely examples for explaining the present invention, and the present invention is not limited to these embodiments. Therefore, the present invention can be embodied in various forms without departing from the gist of the present invention.

[0012] As shown in FIGS. 1 to 3, a battery 1 using a temperature regulator 30 according to this embodiment includes a battery module 10 having a plurality of (24 in this embodiment) rectangular parallelepiped cells 12 arranged along a first direction X, and the plurality of (four in this embodiment) battery modules 10 are adjacently arranged along a third direction Z that intersects (is perpendicular to) both the first direction X and a second direction Y that intersects (is perpendicular to) the first direction X. The temperature regulator 30 regulates the temperature of such a battery 1. Regulating the temperature of the battery 1 means maintaining the temperature of the battery 1 at a predetermined temperature (maintaining it within a predetermined temperature range), and includes cooling the battery 1 when the temperature of the battery 1 is higher than the predetermined temperature, and warming up the battery 1 when the temperature of the battery 1 is lower than the predetermined temperature.

[0013] Here, the first direction X is the longitudinal direction of the vehicle, with X1 being the front direction of the vehicle and X2 being the rear direction of the vehicle. The second direction Y is the vertical direction of the vehicle, and the third direction Z is the left-right direction of the vehicle. The following description will be given taking as an example a case where a cooling circuit (not shown) including a radiator is disposed at the front of the vehicle and the battery 1 is housed in a battery housing space located at the bottom center of the vehicle.

[0014] The battery 1 is housed in a battery housing space at the bottom of the vehicle while being restrained by restraining members K made of metal or the like. As shown in FIG. 3, the battery 1 has a sheet-like heat transfer sheet 20 having one surface in contact with the ventral surfaces (side surfaces along the second direction Y) of all the cells 12 of the battery module 10, and a temperature regulator 30 that is in close contact with the other surface of the heat transfer sheet 20 and adjacent to the side surfaces of all the cells 12 of the battery module 10. The temperature regulator 30 is made of a metal material such as aluminum or iron. Note that the heat transfer sheet 20 is not shown in FIG. 1.

[0015] The plurality of cells 12 are arranged in parallel and electrically connected to one another. The battery 1 is used, for example, in an electric vehicle equipped with a motor as a driving source. The heat transfer sheet 20 and the temperature regulator 30 do not have to be adjacent to all of the cells 12, as long as they are adjacent to a plurality of the cells 12. As described above, the temperature regulator 30 may be provided with a solid object (such as the heat transfer sheet 20) interposed between the cells 12 and the temperature regulator 30, or may be in direct contact with the cells 12.

[0016] For example, a lithium ion battery is used for the cells 12. The battery module 10 generates a high voltage by connecting a plurality of cells 12 in series. The cells 12 generate heat as they generate power (discharge). If the temperature of the cells 12 rises due to heat generation, the power generation performance of the cells 12 will decrease, so the cells 12 need to be cooled. For this reason, in this embodiment, a temperature regulator 30 is disposed between adjacent cells 12 to directly cool the side surfaces of the cells 12.

[0017] The heat transfer sheet 20 is made of a material with high thermal conductivity, such as silicone. As shown in Fig. 3, by closely contacting the heat transfer sheet 20 between the cells 12 and the temperature regulator 30, heat generated in the battery module 10 is efficiently transferred to the temperature regulator 30 via the heat transfer sheet 20. This allows the temperature of the multiple cells 12 that make up the battery module 10 to be regulated.

[0018] As shown in FIGS. 1 to 3 , the temperature controller 30 includes a first flat plate portion 37, a second flat plate portion 38, a connecting wall 80, a partition wall 60, a cover member 50, and a heat insulating material 90. The first flat plate portion 37 and the second flat plate portion 38 face each other along the first direction X. Therefore, the first flat plate portion 37 and the second flat plate portion 38 face predetermined faces of the cells 12 and are provided so as to extend along the second direction Y. In this embodiment, a pair of the first flat plate portion 37 and the second flat plate portion 38 is provided between the side surfaces of two cells 12 adjacent to each other along the first direction X.

[0019] The connecting wall 80 connects the first flat plate portion 37 and the second flat plate portion 38 to each other. In the present embodiment, the connecting wall 80 connects the first flat plate portion 37 and the second flat plate portion 38 to each other in the first direction X at both ends of the first flat plate portion 37 and the second flat plate portion 38 along the second direction Y. Therefore, a plurality of connecting walls 80 are provided in the temperature regulator 30. The connecting wall 80 in the present embodiment has a leakage prevention function that connects the first flat plate portion 37 and the second flat plate portion 38 in a fluid-tight manner.

[0020] The partition wall 60 divides the area sandwiched between the first flat plate portion 37 and the second flat plate portion 38 in the first direction X. In this embodiment, the partition wall 60 has a through-hole formed therein through which a heat insulating material 90 can be inserted. In this embodiment, a plurality of partition walls 60 are provided in the temperature regulator 30. As a result, the partition walls 60 divide the area sandwiched between the first flat plate portion 37 and the second flat plate portion 38 into a plurality of flow path forming regions 31. A communication passage 35 communicating with the plurality of flow path forming regions 31 is provided on the side of an end portion 33 along the third direction Z in the area sandwiched between the first flat plate portion 37 and the second flat plate portion 38. The fluid is a cooling water such as long-life coolant (LLC), insulating oil such as paraffin, or a refrigerant such as hydrofluorocarbon (HFC) or hydrofluoroolefin (HFO). In this embodiment, it is preferable to use a liquid with high electrical insulation, such as a cooling water such as long-life coolant (LLC) or insulating oil such as paraffin.

[0021] As shown in FIG. 2, a first flow path 31A and a second flow path 31B are provided between the first flat plate portion 37 and the second flat plate portion 38. The first flow path 31A is connected to a fluid introduction portion 30Ba (an example of an "inlet") through which a fluid is introduced, and the fluid introduced into the fluid introduction portion 30Ba flows through the first flow path 31A. As a result, the first flow path 31A allows the fluid introduced from the fluid introduction portion 30Ba to flow toward both end portions 33 in the third direction Z. Four first flow paths 31A are formed along the second direction Y between the fluid introduction portion 30Ba and one of both end portions 33 in the third direction Z.

[0022] The second flow paths 31B are connected to a fluid discharge portion 30Bb (an example of an "exhaust port") that turns back the fluid from the first flow path 31A and discharges the fluid. As a result, the second flow paths 31B allow the fluid to flow from both end portions 33 in the third direction Z toward the fluid discharge portion 30Bb. In other words, the direction of fluid flow in the second flow paths 31B is opposite to the direction of fluid flow in the first flow path 31A. Four second flow paths 31B are formed along the second direction Y between one of both end portions 33 in the third direction Z and the fluid discharge portion 30Bb.

[0023] 2 and 3, the flow path forming regions 31 including the first flow paths 31A and the second flow paths 31B are each partitioned by the above-mentioned partition walls 60. As shown in Fig. 3, the partition walls 60 are provided with a uniform width in the second direction Y when viewed in the third direction Z, and the portions that contact the first flat plate portion 37 and the second flat plate portion 38 are configured in an arc shape. Such partition walls 60 can be formed together with the first flat plate portion 37 and the second flat plate portion 38 by extrusion molding or the like.

[0024] The communicating passages 35 are communicating spaces that connect the four first flow paths 31A and the four second flow paths 31B along the second direction Y at both end portions 33 in the third direction Z. That is, the flow path forming region 31 has a turn-back structure in which the communicating passages 35 at both end portions 33 connect the four first flow paths 31A and the four second flow paths 31B to each other and change the fluid flow direction to the opposite direction. In other words, the communicating passages 35 are configured to turn back at the end portions 33 along the third direction Z between the first flat plate portion 37 and the second flat plate portion 38, connecting the downstream end 31AE of the first flow path 31A opposite the fluid inlet portion 30Ba to the upstream end 31BS of the second flow path 31B opposite the fluid outlet portion 30Bb. The downstream end 31AE of the first flow path 31A corresponds to the portion of the communicating passage 35 where each of the multiple first flow paths 31A merges with the upstream flow path 35A. The upstream end 31BS of the second flow path 31B corresponds to a portion where the plurality of second flow paths 31B branch off from the downstream flow path 35B in the communicating path 35. The upstream flow path 35A in the communicating path 35 is a flow path where the plurality of first flow paths 31A in the communicating path 35 merge, and the downstream flow path 35B in the communicating path 35 is a flow path where the plurality of second flow paths 31B in the communicating path 35 branch off.

[0025] 1, the two end portions 33 provided with the communication passages 35 are located opposite the two end portions 12A of the cells 12 of the two outermost battery modules 10 of the four battery modules 10 arranged side by side in the third direction Z, the end portions 33 being the farthest from the central region 14. In this embodiment, the cross-sectional area of ​​each of the four first flow paths 31A and the cross-sectional area of ​​each of the four second flow paths 31B are all the same. The number and shape of the first flow paths 31A and the second flow paths 31B can be changed as desired, and for example, one rectangular hole may be provided on each side.

[0026] 3, in this embodiment, the temperature regulator 30 is provided between the side surfaces of two cells 12 adjacent to each other along the first direction X. The side surfaces of the two cells 12 adjacent to each other along the first direction X correspond to the surfaces of the cells 12 formed in a rectangular prism shape that are perpendicular to the first direction X, i.e., the surfaces that are parallel to the YZ plane. By circulating a fluid through the first flow path 31A and the second flow path 31B of this temperature regulator 30, it is possible to directly cool the side surfaces of the cells 12, thereby improving cooling efficiency.

[0027] 1 , in the present embodiment, four battery modules 10 are provided along the third direction Z, and a piping member 45 is arranged in a central region 14 of the battery 1 along the third direction Z. The piping member 45 communicates with the fluid introduction portion 30Ba, and allows fluid to flow between two battery modules 10 on one side of the third direction Z and two battery modules 10 on the other side of the third direction Z. The central region 14 is a region between two inner battery modules 10 of the four battery modules 10 arranged along the third direction Z.

[0028] The lid member 50 closes the opening 49 when fitted into the opening 49 of the end 33 of the first flat plate portion 37 and the second flat plate portion 38 along the third direction Z. As described above, the temperature regulator 30 has the communication passage 35 on the side of the end 33 along the third direction Z, and is open outward in the third direction Z from the communication passage 35. The lid member 50 is provided to close the open opening 49. The lid member 50 has a shape similar to that of the opening 49, but is configured with an outer shape that is slightly smaller than the inner shape of the opening 49. The lid member 50 is fitted into this opening 49. As a result, the opening 49 is closed by the lid member 50.

[0029] The cover member 50 is welded across the first flat plate portion 37, the second flat plate portion 38, and the partition wall 60 while being fitted into the opening portion 49. For such joining, laser welding, brazing, or arc welding can be used, for example.

[0030] The heat insulating material 90 is formed as a single plate made of a resin material and is arranged so as to connect the multiple connecting walls 80 along the second direction Y. As the resin material, for example, polypropylene, polyphenylene sulfide, 66 nylon, etc. can be used. The heat insulating material 90 is arranged between the first flat plate portion 37 and the second flat plate portion 38.

[0031] Here, recesses 81 are provided on the inner surfaces of the multiple connecting walls 80, sandwiching the heat insulating material 90. The inner surfaces of the connecting walls 80 are the surfaces of the connecting walls 80 that face the partition walls 60 in the second direction Y. In this embodiment, the recesses 81 are formed in the connecting walls 80 to have a predetermined width in the first direction X and a predetermined second depth in the second direction Y. Furthermore, the recesses 81 are formed so as to penetrate the connecting walls 80 in the third direction Z. Such recesses 81 can be formed as rectangular grooves when viewed in the third direction Z.

[0032] In this embodiment, as shown in FIG. 3, recesses 81 are provided at one end side and the other end side in the second direction Y along the first flat plate portion 37 and the second flat plate portion 38. In this embodiment, the recess 81 at the one end side will be described as recess 81A, and the recess 81 at the other end side will be described as recess 81B. The width of the recesses 81A and 81B may be configured to be approximately the same as the thickness (length along the first direction X) of the heat insulating material 90. Furthermore, the depth of the recesses 81A and 81B may be configured so that the length along the second direction Y from the bottom 82A of the recess 81A to the bottom 82B of the recess 81B is approximately the same as the length along the second direction Y of the heat insulating material 90.

[0033] One end of the heat insulating material 90 along the second direction Y is sandwiched between the recessed portion 81A, and the other end of the heat insulating material 90 along the second direction Y is sandwiched between the recessed portion 81B. Therefore, the heat insulating material 90 of this embodiment is provided across multiple flow path forming regions 31. That is, the heat insulating material 90 is provided along the second direction Y in the first flat plate portion 37 and the second flat plate portion 38, from the recessed portion 81A to the recessed portion 81B. This allows the heat insulating material 90 to be supported between the first flat plate portion 37 and the second flat plate portion 38 without bending.

[0034] Other Embodiments Next, other embodiments of the temperature regulator 30 will be described.

[0035] In the above embodiment, the connecting walls 80 are provided at both ends of the first flat plate portion 37 and the second flat plate portion 38 along the second direction Y, and the heat insulating material 90 is provided along the second direction Y on the first flat plate portion 37 and the second flat plate portion 38 from the recesses 81A to 81B provided at both ends. That is, an example in which the heat insulating material 90 is provided across the first flow path 31A and the second flow path 31B has been described. However, the heat insulating material 90 may be provided individually for each of the first flow path 31A and the second flow path 31B. In this case, as shown in FIG. 4 , it is preferable to provide the connecting walls 80 at both ends of the first flat plate portion 37 and the second flat plate portion 38 along the second direction Y, and also provide the connecting walls 80 in the central portions of the first flat plate portion 37 and the second flat plate portion 38 along the second direction Y. A recess 81C recessed toward the second flow path 31B may be provided in the first flow path 31A on the central side along the second direction Y, and a recess 81D recessed toward the first flow path 31A may be provided in the second flow path 31B on the central side along the second direction Y. Furthermore, the heat insulating material 90 may be provided across the recess 81A and the recess 81C, and also across the recess 81B and the recess 81D. Therefore, in this case, a plurality of heat insulating materials 90 (two in the example of FIG. 4) are disposed between the first flow path 31A and the second flow path 31B. In this configuration, the first flow path 31A and the second flow path 31B are separated from each other, thereby preventing fluid from flowing from one of the first flow path 31A and the second flow path 31B to the other.

[0036] In the above embodiment, the heat insulating material 90 is described as being provided across the plurality of flow path forming regions 31. However, as shown in Fig. 5 , it is preferable to provide recesses 81 at both ends of the plurality of flow path forming regions 31 along the second direction Y, and provide the heat insulating material 90 across these recesses 81. This makes it possible to prevent the flow of fluid across each of the plurality of flow path forming regions 31.

[0037] In the above embodiment, the connecting walls 80 are provided at both ends of the first flat plate portion 37 and the second flat plate portion 38 in the second direction Y and have rounded outer shapes (with arc-shaped corners). However, as shown in Fig. 6, the connecting walls 80 may be provided such that the central portions of the connecting walls 80 in the first direction X protrude outward from both ends of the first flat plate portion 37 and the second flat plate portion 38 in the second direction Y.

[0038] [Summary of the above embodiment] The temperature regulator 30 described above will now be outlined.

[0039] (1) The temperature regulator 30 is a temperature regulator 30 that adjusts the temperature of a battery 1 that includes a battery module 10 having a plurality of cells 12 arranged along a first direction X, and includes a first flat plate portion 37 and a second flat plate portion 38 that are provided between side surfaces of two adjacent cells 12 along the first direction X and face each other along the first direction X, a plurality of connecting walls 80 that connect the first flat plate portion 37 and the second flat plate portion 38, and plate-shaped insulating material 90 that is arranged to connect the plurality of connecting walls 80 along a second direction Y that intersects with the first direction X, and recesses 81 that sandwich the insulating material 90 are provided on the inner surfaces of the plurality of connecting walls 80.

[0040] According to this configuration, the insulating material 90 is sandwiched and supported in the recess 81, thereby isolating the area sandwiched between the first flat plate portion 37 and the second flat plate portion 38 from the outside of the temperature controller 30. Therefore, for example, when a fluid is circulated through the area sandwiched between the first flat plate portion 37 and the second flat plate portion 38, the fluid is prevented from leaking to the outside, and the insulating material 90 can improve the insulating performance between the cells 12. Furthermore, by forming the recess 81 in the connecting wall 80, the heat transfer area of ​​the connecting wall 80 is reduced, thereby reducing heat conduction in the connecting wall 80. Therefore, it is possible to suppress heat conduction from one of two adjacent cells 12 to the other in the connecting wall 80. Furthermore, because the insulating material 90 is simply sandwiched and supported in the recess 81, there is no increase in the number of parts, and assembly efficiency is high. As such, the temperature controller 30 having this configuration has high assembly efficiency and high insulating performance between the cells.

[0041] (2) The temperature regulator 30 described in (1) further includes at least one partition wall 60 that divides the area sandwiched between the first flat plate portion 37 and the second flat plate portion 38 in the first direction X, and the partition wall 60 divides the area sandwiched between the first flat plate portion 37 and the second flat plate portion 38 into multiple flow path forming regions 31, and it is preferable that the heat insulating material 90 is provided across the multiple flow path forming regions 31.

[0042] This configuration can reduce heat conduction from one side to the other side in the first direction X in the partition walls 60 that sandwich the heat insulating material 90. Therefore, heat conduction in the partition walls 60 can be suppressed, and the effect of suppressing heat conduction from one side to the other side of two adjacent cells 12 can be further improved.

[0043] (3) In the temperature regulator 30 described in (1) or (2), between the first flat plate portion 37 and the second flat plate portion 38, there is included a first flow path 31A that communicates with a fluid inlet portion 30Ba (inlet) into which a fluid is introduced and through which the fluid flows, and a second flow path 31B that communicates with a fluid outlet portion 30Bb (outlet) that turns back the fluid from the first flow path 31A and discharges the fluid, and it is preferable that the heat insulating material 90 is provided individually for each of the first flow path 31A and the second flow path 31B.

[0044] According to this configuration, the heat insulating material 90 is provided separately in each of the first flow path 31A and the second flow path 31B, thereby preventing the fluid from flowing between the first flow path 31A and the second flow path 31B. Therefore, it is possible to prevent the relatively low-temperature fluid flowing through the first flow path 31A and the relatively high-temperature fluid flowing through the second flow path 31B from mixing together, which would cause the temperature of the fluid flowing through the first flow path 31A to increase, and therefore it is possible to prevent the temperature adjustment function of the temperature adjuster 30 from being impaired.

[0045] (4) In the temperature regulator 30 described in (1) or (2), it is preferable that a single heat insulating material 90 is disposed between the first flat plate portion 37 and the second flat plate portion .

[0046] According to this configuration, the time required to arrange the insulating material 90 between the first flat plate portion 37 and the second flat plate portion 38 can be shortened compared to when multiple insulating materials 90 are provided between the opposing first flat plate portion 37 and the second flat plate portion 38. Furthermore, since the number of parts constituting the temperature regulator 30 can be reduced, the cost of managing parts can be reduced. [Industrial Applicability]

[0047] The technology according to the present disclosure can be used in a temperature regulator that can adjust the temperature of a battery. [Explanation of symbols]

[0048] 1: battery, 10: battery module, 12: cell, 30: temperature regulator, 30Ba: fluid inlet (inlet), 30Bb: fluid outlet (outlet), 31: flow path forming area, 31A: first flow path, 31B: second flow path, 37: first flat plate portion, 38: second flat plate portion, 60: partition wall, 80: connecting wall, 81: recess, 90: heat insulating material, X: first direction, Y: second direction

Claims

1. A temperature regulator for regulating a temperature of a battery including a battery module having a plurality of cells arranged along a first direction, a first flat plate portion and a second flat plate portion that are provided between side surfaces of two of the cells that are adjacent to each other along the first direction and that face each other along the first direction; a plurality of connecting walls that connect the first flat plate portion and the second flat plate portion, a plate-shaped heat insulating material arranged to connect the plurality of connecting walls along a second direction intersecting the first direction, A temperature regulator in which a recess for sandwiching the heat insulating material is provided on the inner surfaces of the plurality of connecting walls.

2. further comprising at least one partition wall that partitions an area sandwiched between the first flat plate portion and the second flat plate portion in the first direction; the partition wall partitions an area sandwiched between the first flat plate portion and the second flat plate portion into a plurality of flow path forming areas, The temperature controller according to claim 1 , wherein the heat insulating material is provided across a plurality of the flow path forming regions.

3. Between the first flat plate portion and the second flat plate portion, there is included a first flow path that communicates with an inlet into which a fluid is introduced and through which the fluid flows, and a second flow path that turns back the fluid from the first flow path and flows, and communicates with an outlet that discharges the fluid, 3. The temperature controller according to claim 1, wherein the heat insulating material is provided for each of the first flow path and the second flow path.

4. 3. The temperature controller according to claim 1, wherein a single heat insulating material is disposed between the first flat plate portion and the second flat plate portion.

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