JP2014149929A - Power storage module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the shape of a passage in which a refrigerant flows from changing due to deformation of a power storage element such as an electric cell thereby inhibiting the aging deterioration of a coolant pipe forming the refrigerant passage and maintaining the cooling capability over a long period.SOLUTION: A power storage module 10 includes a battery pack 100 where multiple electric cells 101 are electrically connected. The power storage module 10 includes: a metal cooling pipe 180 forming a passage in which a refrigerant flows; and a heat transfer plate 170 having recessed parts 172 which hold the cooling pipe 180 and protruding parts 173 thermally connected with the electric cells 101. Each cooling pipe 180 has a pipe heat transfer part that is thermally connected with the electric cells 101 without disposing the heat transfer plate 170 therebetween.

Description

  The present invention relates to a power storage module, and more particularly to a cooling structure for a power storage module.

  A power storage module mounted on a hybrid electric vehicle or a pure electric vehicle includes, for example, a plurality or a single assembled battery. The assembled battery is configured by combining a number of secondary batteries (hereinafter referred to as single cells) such as lithium ion batteries and nickel metal hydride batteries. A unit cell generates heat due to internal resistance during charging and discharging, and as the temperature rises, performance deterioration with respect to lifetime such as capacity reduction tends to occur.

  It is desirable to make the temperature rise of the unit cell as small as possible from the viewpoint of battery life. As a method for cooling the cells constituting the assembled battery, there is a method in which the surface of the cell container of the cell is thermally connected to a heat transfer plate to cool the cell.

  Patent Document 1 describes a cooling plate including a flexible first flat plate and a second flat plate, an intermediate resin portion, and a flow path. The second flat plate is opposed to the first flat plate with a predetermined interval. The intermediate resin portion is interposed between the first flat plate and the second flat plate, and elastically deforms as the unit cell expands. The flow path is formed between the first flat plate and the second flat plate, and a refrigerant composed of gas or liquid passes through the flow path.

JP 2011-96465 A

  In the cooling plate described in Patent Document 1, the intermediate resin portion is deformed as the unit cell expands, and the cross-sectional area of the flow path through which the refrigerant passes varies depending on each flow path. In the flow path having a small cross-sectional area, the flow becomes worse and the pressure loss increases. Further, the flow of the refrigerant varies depending on each flow path, and there is a possibility that sufficient cooling performance cannot be obtained.

  Since the cooling plate described in Patent Document 1 is configured such that the intermediate resin portion that forms the flow path is deformed in accordance with the deformation of the single cell, it deteriorates over time due to repeated expansion and contraction of the intermediate resin portion. It was easy to configure. As the aging deterioration of the intermediate resin portion proceeds, impurities may enter the refrigerant or the refrigerant may leak.

  The power storage module according to claim 1 is a power storage module including a power storage element group in which a plurality of power storage elements are electrically connected, a metal heat transfer tube that forms a flow path through which a heat medium flows, and a power transfer module. A heat transfer plate having a holding portion that holds the heat tube and a plate heat transfer portion that is thermally connected to the power storage element, and the heat transfer tube is thermally connected to the power storage element without passing through the heat transfer plate. It has the pipe heat-transfer part.

  According to the present invention, the shape of the flow path through which the heat medium flows is prevented from changing with the deformation of the power storage element, the deterioration of the heat transfer tubes forming the flow path of the heat medium is suppressed, and the cooling performance Can be maintained over a long period of time.

1 is an external perspective view of a power storage module according to a first embodiment of the present invention. The disassembled perspective view which shows the structure of the electrical storage module of FIG. The perspective view which shows the single battery which comprises the assembled battery of FIG. FIG. 2 is an external perspective view and an exploded perspective view showing a connection structure between the assembled battery and the cooling structure of FIG. FIG. 2 is a schematic cross-sectional view showing a state in which the cooling structure of FIG. 1 and the cells constituting the assembled battery are thermally connected. The cross-sectional schematic diagram of the cooling structure of FIG. The schematic diagram which shows a mode that a heat-transfer plate elastically deforms following the expansion | swelling of a cell. (A) is a cross-sectional schematic diagram which shows the cooling structure used for the electrical storage module which concerns on the modification (1) of 1st Embodiment, (b) concerns on the modification (2) of 1st Embodiment. The cross-sectional schematic diagram which shows the cooling structure used for an electrical storage module. The figure which shows the drain groove provided in the recessed part of the heat exchanger plate used for the electrical storage module which concerns on 2nd Embodiment. The cross-sectional schematic diagram which shows the state with which the cooling structure of the electrical storage module which concerns on 3rd Embodiment, and the cell which comprises an assembled battery were connected thermally. The cross-sectional schematic diagram which shows the state in which the cooling structure used for the electrical storage module which concerns on the modification of 3rd Embodiment, and the cell which comprises an assembled battery were connected thermally. The external appearance perspective view which shows the cooling structure used for the electrical storage module which concerns on 4th Embodiment. The cross-sectional schematic diagram of the cooling structure of FIG. The external appearance perspective view which shows the cooling structure used for the electrical storage module which concerns on 5th Embodiment. The cross-sectional schematic diagram of the cooling structure of FIG. The cross-sectional schematic diagram of the cooling structure used for the electrical storage module which concerns on the modification of 5th Embodiment. The external appearance perspective view which shows the cooling structure used for the electrical storage module which concerns on the 6th Embodiment of this invention. FIG. 18 is a schematic cross-sectional view of the cooling structure of FIG. 17.

  Hereinafter, with reference to the drawings, the present invention is a power storage module incorporated in a power storage device mounted on a hybrid electric vehicle or a pure electric vehicle, and a prismatic lithium ion secondary battery (hereinafter referred to as a single cell) as a power storage element. An embodiment applied to a power storage module having a plurality of In addition, as shown in each drawing, the stacking direction of the unit cells 101 constituting the assembled battery 100, that is, the longitudinal direction of the power storage module 10 is defined as the X direction. The longitudinal direction of the unit cell 101 orthogonal to the X direction is defined as the Y direction, and the direction orthogonal to each of the X direction and the Y direction is defined as the Z direction.

-First embodiment-
FIG. 1 is an external perspective view of a power storage module 10 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing the configuration of the power storage module 10. As shown in FIGS. 1 and 2, the power storage module 10 includes a cooling structure 190 and an assembled battery 100. As shown in FIG. 2, the assembled battery 100 is a power storage element group in which a plurality of unit cells 101 are electrically connected.

  The plurality of unit cells 101 are arranged in a stacked manner, and are integrally assembled by an integrated mechanism including a pair of end plates 120, a pair of side frames 121, and a plurality of cell holders 122A and 122B. The assembled battery 100 is configured.

  Each unit cell 101 has a flat rectangular parallelepiped shape, and is arranged side by side so that the wide side plates 109 </ b> W having a surface having a large area among the side surfaces face each other. Although not shown in the drawing, the adjacent unit cells 101 are oriented so that the positions of the positive electrode terminal 104 and the negative electrode terminal 105 (see FIG. 3) projecting from the battery container of the single cell 101 to one side in the Z direction are reversed. Inverted arrangement. The positive electrode terminal 104 and the negative electrode terminal 105 of each adjacent unit cell 101 are electrically connected by a bus bar which is a metal plate-like conductive member.

  An intermediate cell holder 122A is disposed between the unit cells 101, and an end cell holder 122B is disposed between each of the unit cells 101 disposed at both ends and the end plate 120. The plurality of unit cells 101 arranged in a stacked manner are held by an intermediate cell holder 122A and an end cell holder 122B, and are sandwiched by a pair of end plates 120 from both ends in the X direction of the assembled battery 100. The end plate 120 has a rectangular flat plate shape corresponding to the wide side plate 109 </ b> W of the unit cell 101.

  The material of the intermediate cell holder 122A and the end cell holder 122B is an insulating resin. On the side surfaces of the intermediate cell holder 122A and the end cell holder 122B, convex portions 122c protruding in the Y direction are provided.

  The plurality of unit cells 101, the intermediate cell holder 122 </ b> A, and the end cell holder 122 </ b> B are secured by a pair of side frames 121 while being sandwiched between the pair of end plates 120. The pair of side frames 121 are arranged to face one side and the other side in the Y direction. Each of the pair of side frames 121 includes a pair of flanges 121f provided at both ends in the X direction and an opening 121c provided between the pair of flanges 121f.

  The opening 121c of the side frame 121 is fitted to the convex portion 122c of the intermediate cell holder 122A and the end cell holder 122B from the outside in the Y direction. Both ends of the opening 121c in the X direction are engaged with convex portions 120c protruding outward in the Y direction from both ends of the end plate 120 in the Y direction. The flange 121f is in contact with the end plate 120.

  The flange 121f provided on the side frame 121 is provided with a through hole (not shown), and the end plate 120 is provided with a screw hole (not shown). A fixing screw (not shown) is inserted into the through hole (not shown) of the side frame 121 from the X direction outside of the end plate 120, and the fixing screw is screwed into the screw hole (not shown) of the end plate 120, A side frame 121 is attached to the end plate 120. Thereby, the intermediate cell holder 122A and the end cell holder 122B sandwiched between the pair of end plates 120 are compressed by a predetermined amount, and each unit cell 101 is moved by the pair of end plates 120 via the intermediate cell holder 122A and the end cell holder 122B. Retained.

  An insulating cell holder 122A having an insulating property is interposed between the single cells 101, and an insulating cell holder 122B having an insulating property is interposed between the end plate 120 and the single cell 101, thereby ensuring insulation. In addition, the relative position of each unit cell 101 is defined.

  The single battery 101 constituting the assembled battery 100 will be described. The plurality of unit cells 101 have the same structure. FIG. 3 is a perspective view showing the unit cell 101. As shown in FIG. 3, the unit cell 101 includes a rectangular battery container including a battery can 109 and a battery lid 108. The battery can 109 and the battery lid 108 are both made of aluminum. The battery can 109 has a rectangular box shape having an opening 109A at one end. The battery lid 108 has a rectangular flat plate shape and is laser-welded so as to close the opening 109 </ b> A of the battery can 109. That is, the battery lid 108 seals the battery can 109.

  The battery container has a hollow rectangular parallelepiped shape, the wide side plates 109W having wide surfaces face each other, the narrow side plates 109N having narrow surfaces face each other, and the battery lid 108 and the bottom plate 109B of the battery can 109. Are facing each other.

  The battery cover 108 is provided with a positive terminal 104 and a negative terminal 105. A charge / discharge element (not shown) is housed inside the battery container in a state of being covered by an insulating case (not shown). A positive electrode of a charge / discharge element (not shown) is connected to the positive terminal 104, and a negative electrode of the charge / discharge element is connected to the negative terminal 105. For this reason, electric power is supplied to the external device via the positive electrode terminal 104 and the negative electrode terminal 105, or external generated power is supplied to the charge / discharge element via the positive electrode terminal 104 and the negative electrode terminal 105 to be charged.

The battery lid 108 has a liquid injection hole for injecting an electrolyte into the battery container. The injection hole is sealed with an injection plug 108A after the electrolyte is injected. As the electrolytic solution, for example, a non-aqueous electrolytic solution in which a lithium salt such as lithium hexafluorophosphate (LiPF ₆ ) is dissolved in a carbonate-based organic solvent such as ethylene carbonate can be used.

  The battery cover 108 is provided with a gas discharge valve 108B. The gas discharge valve 108B is formed by partially thinning the battery lid 108 by press working. The thin-walled member may be attached to the opening of the battery lid 108 by laser welding or the like, and the thin portion may be used as a gas discharge valve. The gas discharge valve 108B is cleaved when the unit cell 101 generates heat due to an abnormality such as overcharge and gas is generated and the pressure in the battery container rises to reach a predetermined pressure, and discharges the gas from the inside. This reduces the pressure in the battery container.

  A cooling structure of the power storage module 10 will be described. FIG. 4 is an external perspective view and an exploded perspective view showing a connection structure between the assembled battery 100 and the cooling structure 190. In FIG. 4, illustration of the cooling pipe 180 is omitted. FIG. 5 is a schematic cross-sectional view showing a state where the cooling structure 190 and the unit cells 101 constituting the assembled battery 100 are thermally connected, and FIG. 6 is a schematic cross-sectional view of the cooling structure 190. In FIG. 5, the unit cell 101 is shown by a two-dot chain line.

  As shown in FIGS. 1 and 2, the cooling structure 190 includes a heat transfer plate 170 and a cooling pipe 180. The heat transfer plate 170 and the cooling pipe 180 are made of a metal material having excellent thermal conductivity such as aluminum. The heat transfer plate 170 is disposed so as to cover the bottom plate 109 </ b> B of each unit cell 101 constituting the assembled battery 100.

  The cooling pipe 180 is a cylindrical pipe having a circular cross section, and forms a refrigerant flow path through which a cooling heat medium (hereinafter referred to as a refrigerant) such as an ethylene glycol aqueous solution flows. As shown in FIG. 2, the cooling pipe 180 has an S-shape as a whole, and folded portions 182 are provided at both ends in the X direction so that the refrigerant is U-turned twice. Three are arranged along the X direction. One end of the cooling pipe 180 is provided with a refrigerant inlet for introducing a refrigerant, and the other end of the cooling pipe 180 is provided with a refrigerant outlet for discharging the refrigerant.

  As shown in FIG. 6, the heat transfer plate 170 has a shape in which convex portions and concave portions are alternately arranged along the Y direction so that the cross section has a zigzag shape. The heat transfer plate 170 is formed as a single part by pressing a single rectangular flat plate or by extrusion.

  On one side of the heat transfer plate 170 in the Z direction (hereinafter referred to as + Z side), heat is transferred to the recess 172 for holding the cooling pipe 180 and each bottom plate 109B of the unit cell 101 arranged along the X direction. The convex portions 173 that are in contact with each other via the sheet 160 are alternately provided. The top surface of each convex portion 173 is provided in the same plane, and the concave portion 172 is provided so as to be recessed from the top surface of the convex portion 173 toward the other side in the Z direction of the heat transfer plate 170 (hereinafter referred to as -Z side). It has been. The concave portion 172 and the convex portion 173 are extended from one end of the heat transfer plate 170 to the other end along the X direction. The plurality of recesses 172 have a U-shaped cross section, and all of them have a shape that can hold the cooling pipe 180.

  On the −Z side of the heat transfer plate 170, a convex portion 177 is formed at a position corresponding to the concave portion 172, and a concave portion 178 is formed at a position corresponding to the convex portion 173. That is, the convex portion 177 and the concave portion 178 are extended from one end of the heat transfer plate 170 to the other end along the X direction. The top surface of each convex portion 177 is provided in the same plane, and the concave portion 178 is provided so as to be recessed from the top surface of the convex portion 177 toward the + Z side of the heat transfer plate 170. The recess 178 has a U-shaped cross section.

  The straight pipe portion 181 of the cooling pipe 180 is press-fitted into the three concave parts 172 of the plurality of concave parts 172 provided on the + Z side of the heat transfer plate 170, and the cooling pipe 180 is held by the concave parts 172. As shown in the drawing, the straight pipe portion 181 of the cooling pipe 180 is arranged at a predetermined interval in the Y direction. In the present embodiment, the straight pipe portions 181 are arranged at intervals of 3 pitches. By dispersing the positions where the straight pipe portions 181 are arranged in the Y direction, the assembled battery 100 can be cooled more uniformly than in the case where the straight pipe portions 181 are concentrated, that is, biased.

  The outer peripheral surface on the −Z side of the cooling pipe 180 is in contact with the bottom surface 172 b that forms the recess 172. The outer peripheral surfaces of one side in the Y direction (hereinafter referred to as + Y side) and the other side in the Y direction (hereinafter referred to as -Y side) of the cooling pipe 180 are in contact with the side surface 172s constituting the recess 172, respectively. The outer peripheral surface on the + Z side of the cooling pipe 180 is not in contact with the heat transfer plate 170.

  Both ends of the heat transfer plate 170 in the Y direction are attachment pieces 171 attached to the assembled battery 100. As shown in FIG. 4B, each attachment piece 171 has a plurality of through holes 171h through which screws 199 are inserted. Is provided. A screw hole 120 h is provided on the surface of the end plate 120 on the −Z side. A screw hole 122h is provided on the surface on the −Z side of the intermediate cell holder 122A disposed in the center of the assembled battery 100 in the X direction.

  As shown in FIG. 4A, the screw 199 is inserted into the through hole 171h of the heat transfer plate 170, and the screw 199 is screwed into the screw hole 120h of the end plate 120 and the screw hole 122h of the intermediate cell holder 122A. In addition, the cooling structure 190 is fastened to the assembled battery 100.

  As shown in FIG. 4B and FIG. 5, a heat transfer sheet 160 is disposed between the cooling structure 190 and the assembled battery 100. The heat transfer sheet 160 is laid so as to cover the entire surface of the cooling structure 190 on the + Z side. The heat transfer sheet 160 is formed of a flexible thin insulator, for example, a sheet based on silicon and has adhesiveness on both front and back surfaces. The heat transfer sheet 160 is preferably an insulating sheet having a thermal conductivity of about 1 to 30 W / m · K.

  When the cooling structure 190 is fastened to the assembled battery 100 by the plurality of screws 199, the bottom plate 109B of the unit cell 101 and the top surface of the convex portion 173 are held in pressure contact with each other via the heat transfer sheet 160, The bottom plate 109 </ b> B of the unit cell 101 and the + Z side surface of the cooling pipe 180 are held in pressure contact with each other via the heat transfer sheet 160.

  As shown in FIG. 5, the heat transfer sheet 160 is compressed and brought into close contact with the bottom plate 109 </ b> B of the unit cell 101, the top surface of each convex portion 173, and the + Z side surface of the cooling pipe 180.

  Thereby, the top surface of the convex portion 173 of the heat transfer plate 170 is thermally connected to the bottom plate 109B of the unit cell 101, and the + Z side surface of the cooling pipe 180 does not go through the heat transfer plate 170 and the bottom plate of the unit cell 101 Thermally connected to 109B. In the present specification, “thermally connected” means that a state in which heat can be transferred between two objects is formed by a thermally conductive solid material such as metal or resin. ing. Between two thermally connected objects, heat flows from a hot object to a cold object until thermal equilibrium is reached. In the present embodiment, the top surface of convex portion 173 and the + Z side surface of cooling pipe 180 are thermally connected to unit cell 101 through heat transfer sheet 150.

  FIG. 7 is a schematic diagram showing a state in which the heat transfer plate 170 is elastically deformed following the expansion of the unit cell 101. In FIG. 7, the cooling pipe 180 and the heat transfer sheet 160 are not shown for convenience. The heat transfer plate 170 is configured to elastically deform following the deformation of the unit cell 101. The heat transfer plate 170 of the present embodiment has a thickness of about 0.5 to 4 mm, and the cooling pipe 180 and the recess 172 extend from one end of the heat transfer plate 170 to the other end along the X direction. Yes. Therefore, the heat transfer plate 170 has a bending rigidity in a direction (Y direction) orthogonal to the straight pipe portion 181 and the concave portion 172 of the cooling pipe 180 in a direction parallel to the straight pipe portion 181 and the concave portion 172 of the cooling pipe 180 (X Direction) is low. As a result, when the unit cell 101 expands with charge and discharge and is bent so that the center in the Y direction of the bottom plate 109B expands in the −Z direction as shown, the heat transfer plate 170 also bends along the bottom plate 109B.

According to this embodiment described above, the following operational effects can be achieved.
(1) The cooling structure 190 includes a metal cooling pipe 180 that forms a flow path through which a refrigerant flows, and a heat transfer plate 170. In the heat transfer plate 170, the concave portions 172 and the convex portions 173 are alternately provided, the predetermined concave portions 172 serve as holding portions for holding the cooling pipe 180, and the convex portions 173 are thermally connected to the unit cells 101. It is considered as a heat transfer part. The cooling pipe 180 has a + Z side shown in FIG. 6 as a pipe heat transfer section that is thermally connected to the unit cell 101 without passing through the heat transfer plate 170. Thus, in this Embodiment, since the cooling pipe 180 is thermally connected to the cell 101 without passing through the heat transfer plate 170, the cell 101 can be efficiently cooled.

  (2) Even if the cooling pipe 180 forming the flow path is made of metal and the unit cell 101 is deformed, the flow path area of the refrigerant can be kept constant. On the other hand, the technique described in Patent Document 1 (hereinafter referred to as the prior art) is configured such that the intermediate resin portion that forms the refrigerant flow path is deformed in accordance with the deformation of the unit cell. The area will change. For this reason, with the conventional power storage module, it has been difficult to calculate the pressure limit and set the pressure resistance based on the actual flow path shape. In the present embodiment, since the flow channel area does not change, it is possible to easily perform pressure limit calculation and pressure resistance setting based on the actual flow channel shape.

  (3) The battery pack cooling mechanism of the prior art has a configuration that is likely to deteriorate over time due to repeated expansion and contraction of the intermediate resin portion. For this reason, when the aged deterioration of the intermediate resin portion progresses, there is a risk that impurities are mixed in the refrigerant or the refrigerant leaks. On the other hand, in the present embodiment, the coolant channel is formed by the metal cooling pipe 180, and the deformation of the cooling pipe 180 with the deformation of the unit cell 101 can be suppressed. For this reason, in this Embodiment, the aged deterioration of the cooling pipe 180 can be suppressed, a refrigerant | coolant can be prevented from leaking, and cooling performance can be maintained over a long term.

  (4) The straight pipe portion 181 of the cooling pipe 180 extends from one end of the heat transfer plate 170 along the X direction to the other end, and the bending rigidity of the heat transfer plate 170 in the Y direction is the X direction. It is lower than the bending rigidity. That is, the cooling structure 190 has elasticity and is configured to follow the deformation of the unit cell 101. For this reason, when the unit cell 101 expands, the heat transfer plate 170 elastically deforms following the deformation of the unit cell 101, and the cooling structure 190 and the unit cell 101 are brought into close contact with each other via the heat transfer sheet 160. Can keep the state. In addition, when the heat transfer plate 170 is curved, a force enough to deform the straight pipe portion 181 does not act on the straight pipe portion 181, so that the flow passage area of each cooling pipe 180 is kept constant.

  (5) The heat transfer sheet 160 having flexibility is disposed between the cooling structure 190 and the assembled battery 100. Thereby, the adhesiveness of the bottom plate 109B of the unit cell 101, the cooling pipe 180, and the heat transfer plate 170 can be improved.

  (6) The number of straight pipe portions 181 of the cooling pipe 180 takes into account the specifications and usage environment of the unit cell 101, the type of refrigerant, the flow rate of the refrigerant, the material of the cooling pipe 180, the thickness, the pipe diameter, and the like. Is set as appropriate. In the present embodiment, the heat transfer plate 170 is provided with a plurality of recesses 172 for holding the straight pipe portion 181 of the cooling pipe 180. For this reason, the cooling pipe 180 can be arranged in any one or two or more of the plurality of recesses 172 depending on conditions. Costs can be reduced by sharing parts.

  (7) Since the heat transfer plate 170 is formed in a zigzag shape along the Y direction, the contact area with the air can be increased as compared with the cooling structure in which the cooling pipe 180 is welded to the flat plate member. The cooling effect by air can be enhanced.

  (8) Since the cooling structure 190 and the assembled battery 100 are held in pressure contact with each other by screw fastening, variation in the portion to be cooled of the assembled battery 100 is suppressed, and the entire assembled battery 100 is effective. Can be cooled to. Note that the configuration for press-contact is not limited to the above-described screw fastening, and instead of screw fastening, the cooling structure 190 and the assembled battery 100 are held in a press-contact state by an elastic member such as a clip. It can also be configured.

  (9) By pressing the cooling pipe 180 into the recess 172, the cooling pipe 180 and the heat transfer plate 170 can be thermally connected. For this reason, recyclability improves compared with the case where a heat transfer plate and a cooling pipe are metal-bonded by welding or the like. In the case of metal bonding, crushing or the like is necessary to decompose by material. On the other hand, in this embodiment, since metal bonding is not performed, recyclability and maintainability are excellent.

  (10) A single heat transfer plate includes a concave portion 172 as a holding portion for holding the cooling pipe 180 and a convex portion 173 as a plate heat transfer portion that is thermally connected to the unit cell 101 constituting the assembled battery 100. 170. Thereby, the cooling structure 190 can be reduced in size, weight, and cost.

-Modification (1) of the first embodiment-
With reference to FIG. 8A, a cooling structure 190A used in the power storage module according to the modification (1) of the first embodiment will be described. FIG. 8A is a diagram similar to FIG. 6, and is a schematic cross-sectional view of a cooling structure 190 </ b> A used in the power storage module according to Modification (1) of the first embodiment of the present invention. In the figure, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Hereinafter, differences from the first embodiment will be described in detail.

  In the modification (1) of the first embodiment, the straight tube portion of the aluminum heating tube 180A is press-fitted into the recess 178 of the cooling structure 190 of the first embodiment, and the heating tube 180A and the heat transfer plate are pressed. 170 is thermally connected. A heating heat medium is circulated through the flow path inside the heating tube 180A.

  According to the power storage module according to the modification (1) of the first embodiment, in addition to the same functions and effects as those of the first embodiment, the following functions and effects are achieved. The temperature of the assembled battery 100 can be raised by circulating the heating heat medium in the heating tube 180A. For example, in a power storage module used in a cold district or the like, it can be warmed to a temperature at which the performance of the power storage module can be sufficiently exhibited before use. By providing the heating pipe 180 </ b> A and the cooling pipe 180, the temperature can be adjusted in a temperature range suitable for the unit cell 101.

-Modification (1) of the first embodiment-
With reference to FIG. 8B, a cooling structure 190B used in the power storage module according to the modification (2) of the first embodiment will be described. FIG. 8B is a diagram similar to FIG. 6, and is a schematic cross-sectional view of a cooling structure 190 </ b> B used in the power storage module according to Modification (2) of the first embodiment of the present invention. In the figure, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Hereinafter, differences from the first embodiment will be described in detail.

  In the modification (2) of the first embodiment, wiring such as a power supply line 186 and a communication line 187 is provided in the recess 178 of the cooling structure 190 of the first embodiment. By providing the power supply line 186 and the communication line 187 along the recess 178, the dead space of the cooling structure 190 can be used effectively.

  According to the power storage module according to the modification (2) of the first embodiment, in addition to the same functions and effects as those of the first embodiment, the following functions and effects are achieved. Since the power supply line 186 and the communication line 187 are disposed in the concave portion 178 of the cooling structure 190, the dead space of the cooling structure 190 can be used effectively, and the power storage module 10 can be made compact, light, and low in cost. Can be planned.

  Note that as an example of providing the wiring, either the power supply line 186 or the communication line 187 may be provided.

-Second Embodiment-
With reference to FIG. 9, the heat-transfer plate used for the electrical storage module according to the second embodiment will be described. FIG. 9 is a view showing a drain groove 275 provided in the recess 178 of the heat transfer plates 270A and 270B used in the power storage module according to the second embodiment of the present invention. In the figure, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Hereinafter, differences from the first embodiment will be described in detail.

  As shown to Fig.9 (a), in 2nd Embodiment, the drainage groove 275 is provided in the recessed part 178 of the cooling structure 190 of 1st Embodiment. The drain grooves 275 are provided from one end to the other end of the heat transfer plate 270A along the X direction at both ends in the Y direction of the bottom surface constituting the recess 178.

  According to the power storage module according to the second embodiment, in addition to the same functions and effects as those of the first embodiment, the following functions and effects are achieved. As shown in FIG. 1, when the power storage module is installed so that the + Y direction is upward and the -Y direction is downward, if condensation occurs on the heat transfer plate 270A, the condensed water flows along the drainage grooves 275, It is dropped from the end of the heat plate 270A.

  By providing the drainage groove 275, the dripping position of the condensed water can be set at both ends of the power storage module 10, and the condensed water is dripped at an unspecified position such as the center in the X direction, thereby preventing the circuit from being short-circuited. be able to.

  In addition, as shown in FIG.9 (b), you may make it perform curved surface R by giving R chamfering to the corner | angular part of the heat-transfer plate 270B.

-Third embodiment-
A power storage module according to the third embodiment will be described with reference to FIG. FIG. 10 is a schematic cross-sectional view showing a state where the cooling structure 390 of the power storage module according to the third embodiment of the present invention and the unit cells 101 constituting the assembled battery 100 are thermally connected. In the figure, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Hereinafter, differences from the first embodiment will be described in detail.

  In the power storage module 10 of the first embodiment, the assembled battery 100 is thermally connected to the + Z side of the cooling structure 190 (see FIG. 5). On the other hand, as shown in FIG. 10, the power storage module according to the third embodiment includes two assembled batteries 100, and the assembled battery 100 is heated on each of the + Z side and the −Z side of the cooling structure 390. Connected.

  The cooling structure 390 includes a heat transfer plate 170 and a cooling pipe 180 in the same manner as the cooling structure 190 of the first embodiment. The cooling structure 390 further includes a cooling pipe 180 disposed on the −Z side of the heat transfer plate 170.

  The straight pipe portion 181 of the cooling pipe 180 is press-fitted into three places of the plurality of recesses 178, and the cooling pipe 180 and the heat transfer plate 170 are thermally connected. The cooling structure 390 is thermally connected to one assembled battery 100 via the heat transfer sheet 160 on the + Z side, and is thermally connected to the other assembled battery 100 via the heat transfer sheet 160 on the −Z side.

  In the first embodiment, the cooling structure 190 and the assembled battery 100 are fastened by the screw 199. In the third embodiment, an elastic force by a clip (elastic member) (not shown) is used instead of the screw 199. Thus, the assembled battery 100 and the cooling structure 390 are fastened together. Thereby, the heat transfer sheet 160 provided on each of the + Z side and the −Z side of the cooling structure 390 is compressed and brought into close contact with the cooling structure 390 and the assembled battery 100.

  The + Z side convex portion 173 is thermally connected to the unit cell 101 constituting the assembled battery 100 arranged on the + Z side, and the −Z side convex portion 177 constitutes the assembled battery 100 arranged on the −Z side. It is thermally connected to the unit cell 101.

  The + Z side surface of the cooling pipe 180 held by the + Z side recess 172 is thermally connected to the unit cell 101 without passing through the heat transfer plate 170. The cooling pipe 180 held by the −Z side recess 178 is thermally connected to the unit cell 101 without the heat transfer plate 170 on the −Z side surface. Thus, in this Embodiment, since the cooling pipe 180 is provided with the pipe | tube heat-transfer part thermally connected to the single cell 101 not via the heat-transfer plate 170, the single cell 101 is cooled efficiently. be able to.

  According to such 3rd Embodiment, in addition to the effect similar to (1)-(3), (5)-(10) demonstrated in 1st Embodiment, the following effect is demonstrated. Play. The cooling structure 390 is sandwiched between the + Z side assembled battery 100 and the −Z side assembled battery 100. For this reason, it can suppress that the baseplate 109B of the cell 101 deform | transforms so that it may swell. Furthermore, since the pair of assembled batteries 100 can be cooled by the cooling structure 390, the power storage module can be reduced in size, weight, and cost.

-Modification of the third embodiment-
Referring to FIG. 11, cooling structures 390A and 390B used in the power storage module according to the modification of the third embodiment will be described. FIG. 11 is a view similar to FIG. 10, and includes cooling structures 390 </ b> A and 390 </ b> B used in the power storage module according to the modification of the third embodiment of the present invention and the unit cells 101 constituting the assembled battery 100. It is a cross-sectional schematic diagram which shows the state connected thermally. In the figure, the same or corresponding parts as those in the third embodiment are denoted by the same reference numerals, and description thereof is omitted. Hereinafter, differences from the third embodiment will be described in detail.

  The power storage module according to the modification of the third embodiment is thermally connected to the first cooling structure 390A thermally connected to the assembled battery 100 provided on the + Z side and the assembled battery 100 provided on the −Z side. And a second cooling structure 390B connected to the. The first cooling structure 390A and the second cooling structure 390B have the same configuration as the cooling structure 190 described in the first embodiment.

  The second cooling structure 390B is in contact with the first cooling structure 390A while being rotated 180 degrees with respect to the first cooling structure 390A. As shown in the figure, the first cooling structure 390A and the second cooling structure 390B are surfaces on which the heat transfer plate 170 of the first cooling structure 390A and the heat transfer plate 170 of the second cooling structure 390B are in contact with each other. Are arranged so as to have a plane-symmetric shape.

  In the pair of heat transfer plates 170, the top surfaces of the convex portions 177 are in contact with each other. The pair of heat transfer plates 170 are overlapped to form a rectangular parallelepiped space by the recess 178 as shown in the figure. This space is filled with a thermal conductive material 150 having a higher thermal conductivity than air.

  According to such a modification of the third embodiment, the same operational effects as those of the third embodiment can be obtained. In the modification of the third embodiment, the heat capacity can be increased and the strength can be increased as compared with the third embodiment. By filling the thermal conductive material 150, the heat transfer efficiency can be improved as compared with the case where the thermal conductive material 150 is not filled.

-Fourth embodiment-
A cooling structure 490 used in the power storage module according to the fourth embodiment will be described with reference to FIGS. 12 and 13. FIG. 12 is an external perspective view showing a cooling structure 490 used in the power storage module according to the fourth embodiment of the present invention. FIG. 13 is a schematic cross-sectional view of the cooling structure 490. In the figure, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Hereinafter, differences from the first embodiment will be described in detail.

  In the first embodiment, the recess 172 that holds the cooling pipe 180 has a U-shaped cross-sectional shape (see FIG. 6). On the other hand, in 4th Embodiment, the recessed part 472 holding the cooling pipe 180 has U-shaped cross-sectional shape (refer FIG. 13).

  The cooling structure 490 includes a heat transfer plate 470 and a cooling pipe 180. The heat transfer plate 470 has a + Z side surface as a contact surface in contact with the assembled battery 100, and is provided with a recess 472 so as to be recessed in the −Z direction from the contact surface. The recess 472 is provided along the X direction from one end to the other end of the heat transfer plate 470 in the X direction. The straight pipe portion 181 of the cooling pipe 180 is press-fitted into the recess 472, and the cooling pipe 180 is held by the recess 472. Has been.

  The bottom surface of the recess 472 is formed in an arc shape that is substantially the same as the outer diameter of the cooling tube 180, and the bottom surface of the recess 472 is in contact with the surface on the −Z side of the cooling tube 180.

  According to such 4th Embodiment, there exists an effect similar to 1st Embodiment.

-Fifth embodiment-
A cooling structure 590 used in the power storage module according to the fifth embodiment will be described with reference to FIGS. 14 and 15. FIG. 14 is an external perspective view showing a cooling structure 590 used in the power storage module according to the fifth embodiment of the present invention. 15 is a schematic cross-sectional view taken along line XV-XV in FIG. In the figure, the same or corresponding parts as those in the fourth embodiment are denoted by the same reference numerals, and description thereof is omitted. Hereinafter, differences from the fourth embodiment will be described in detail.

  The heat transfer plate 570 is provided with a plurality of holding pieces 577 having a J-shaped cross section for holding the cooling pipe 180. Each holding piece 577 can be formed, for example, by pressing and bending one rectangular flat plate member.

  Holding pieces 577 that hold the cooling pipe 180 from the + Y side and holding pieces 577 that hold the cooling pipe 180 from the −Y side are alternately provided along the X direction at predetermined intervals.

  An opening 578 is formed on the + Z side of the cooling pipe 180 of the heat transfer plate 570. As shown in FIG. 14, the heat transfer sheet 160 is pressed into the opening 578 and is in close contact with the cooling pipe 180. Thereby, the surface on the + Z side of the cooling pipe 180 is thermally connected to the bottom plate 109 </ b> B of the unit cell 101 without passing through the heat transfer plate 570.

  According to such 5th Embodiment, there exists an effect similar to 4th Embodiment.

-Modification of the fifth embodiment-
A cooling structure 590A used in the power storage module according to the modification of the fifth embodiment will be described with reference to FIG. FIG. 16 is a diagram similar to FIG. 15 and is a schematic cross-sectional view of a cooling structure 590A used in the power storage module according to the modification of the fifth embodiment of the present invention. In the drawing, the same or corresponding parts as those in the fifth embodiment are denoted by the same reference numerals, and the description thereof is omitted. Hereinafter, differences from the fifth embodiment will be described in detail.

  In the fifth embodiment, both ends in the Y direction of the heat transfer plate 570A are bent 180 degrees to form bent ribs 579. According to such a modification of the fifth embodiment, the same operational effects as those of the fifth embodiment can be achieved, and the bending rigidity can be further increased.

-Sixth embodiment-
A cooling structure 690 used in the power storage module according to the sixth embodiment will be described with reference to FIGS. 17 and 18. FIG. 17 is an external perspective view showing a cooling structure 690 used in the power storage module according to the sixth embodiment of the present invention. FIG. 18 is a schematic cross-sectional view of the cooling structure 690. In the figure, the same or corresponding parts as those in the third embodiment are denoted by the same reference numerals, and description thereof is omitted. Hereinafter, differences from the third embodiment will be described in detail.

  The cooling structure 690 of the sixth embodiment is the assembled battery 100 (FIG. 18) arranged on the + Z side of the cooling structure 690 on the + Z side surface, as in the third embodiment shown in FIG. The battery pack 100 (not shown in FIG. 18) disposed on the −Z side of the cooling structure 690 is cooled on the −Z side surface.

  The cooling structure 690 includes a cooling pipe 180, a plurality of heat transfer plates 670, and support members 674 that support the cooling pipe 180 and the heat transfer plates 670 at both ends in the X direction. The plurality of heat transfer plates 670 includes an end plate 670 </ b> A arranged at the Y direction end and an intermediate plate 670 </ b> B arranged between the straight pipe portions 181 of the cooling pipe 180. The intermediate plates 670B are disposed adjacent to each other, and the end plate 670A is disposed adjacent to the intermediate plate 670B.

  As shown in FIG. 18, the end plate 670A is formed by bending so that one flat plate has a substantially rectangular shape, and has a pair of flat plate portions parallel to the XY plane. The end plate 670A is a first plate heat transfer section 670c in which the flat plate portion on the + Z side is thermally connected to the unit cell 101 constituting the assembled battery 100 on the + Z side, and the flat plate portion on the −Z side is − The second plate heat transfer section 670d is thermally connected to the unit cell 101 constituting the Z-side assembled battery 100. The first plate heat transfer unit 670c and the second plate heat transfer unit 670d are provided in parallel to each other, and the surface that is thermally connected to the unit cell 101 is a flat surface. The end plate 670A has a curved portion 670e that is thermally connected to the cooling pipe 180 at one end in the Y direction.

  The intermediate plate 670B is formed by bending so that one flat plate has a substantially rectangular shape, and has a pair of flat plate portions parallel to the XY plane. The intermediate plate 670B is a first plate heat transfer portion 670f in which the flat plate portion on the + Z side is thermally connected to the unit cell 101 constituting the assembled battery 100 on the + Z side, and the flat plate portion on the -Z side is -Z. The second plate heat transfer section 670g is thermally connected to the unit cell 101 constituting the battery pack 100 on the side. The first plate heat transfer unit 670f and the second plate heat transfer unit 670g are provided in parallel to each other, and a surface thermally connected to the unit cell 101 is a flat surface. The intermediate plate 670B has curved portions 670h1 and 670h2 that are thermally connected to the cooling pipe 180 at both ends in the Y direction.

  Of the three straight pipe portions 181, the straight pipe portion 181 disposed at the center is sandwiched between the curved portion 670h2 of the + Y side intermediate plate 670B and the curved portion 670h1 of the −Y side intermediate plate 670B. . That is, a holding portion that holds the cooling pipe 180 is formed by the curved portion 670h2 of the + Y side intermediate plate 670B and the curved portion 670h1 of the −Y side intermediate plate 670B.

  The straight pipe portion 181 disposed on the + Y direction end side is sandwiched between the bending portion 670e of the end plate 670A and the bending portion 670h1 of the intermediate plate 670B. That is, a holding portion that holds the cooling pipe 180 is formed by the bending portion 670e and the bending portion 670h1. The straight pipe portion 181 disposed on the −Y direction end side is sandwiched between the curved portion 670e of the end plate 670A and the curved portion 670h2 of the intermediate plate 670B. That is, a holding portion that holds the cooling pipe 180 is formed by the bending portion 670e and the bending portion 670h2.

  As shown in FIG. 17, both ends in the X direction of the straight pipe portion 181 and both ends in the X direction of each heat transfer plate 670 are attached to the support member 674. Support member 674 has a through hole through which cooling pipe 180 is inserted, and a fitting recess (not shown) into which an end of heat transfer plate 670 is press-fitted. The heat transfer plate 670 is fixed to the support member 675 by press-fitting the end of each heat transfer plate 670 into the fitting recess of the support member 675. Thus, the cooling pipe 180 is held by the heat transfer plate 670, and the cooling pipe 180 and the heat transfer plate 670 are integrated.

  In such a sixth embodiment, the + Z side surface and the −Z side surface of the cooling pipe 180 where the curved portions 670 e, 670 h 1, 670 h 2 of the heat transfer plate 670 are not in contact are interposed via the heat transfer plate 670. Instead, it is thermally connected to the unit cell 101.

  Therefore, according to the sixth embodiment, the same function and effect as those of the third embodiment can be achieved.

The following modifications are also within the scope of the present invention, and one or a plurality of modifications can be combined with the above-described embodiment.
[Modification]
(1) In the first embodiment, the example in which the three concave portions 172 of the plurality of concave portions 172 are the holding portions that hold the cooling pipe 180 has been described, but the present invention is not limited to this. In the first embodiment, one, two, or four or more recesses 172 out of the plurality of recesses 172 are used as holding units, and the cooling pipe 180 is held by the recesses that are used as holding units. Also good.

  (2) In the above-described embodiment, the cooling pipe 180 is a cylindrical pipe having a circular cross section, but the present invention is not limited to this. It may be a hollow cylindrical tube having a rectangular cross section, a polygonal cross section, or a flat cross section. The example in which the cooling pipe 180 is bent at the end in the X direction and one cooling pipe 180 is attached to one heat transfer plate 170 has been described. However, a plurality of cooling pipes are attached to one heat transfer plate 170. May be.

  (3) By roughening the surface of the cooling pipe 180 or the heating pipe 180A, which is a heat transfer pipe, and the surface of the heat transfer plate, forming a fine uneven surface, and closely contacting the heat transfer sheet 160 to the uneven surface, The heat transfer area of the heat transfer tube can be increased. As a method for roughening the surface of the heat transfer tube and the heat transfer plate, a chemical etching process, a sand blasting process, an unevenness forming process using a press, a plating process, a material having good thermal conductivity is applied or affixed, etc. Various methods such as a treatment for covering the surface can be employed. The portion to be roughened can be limited to the surface portion of the heat transfer tube and the heat transfer plate in contact with the heat transfer sheet 160. Furthermore, a material having good thermal conductivity can be applied to the outer surface of the bottom plate 109B, which is the cooling surface of the battery can 109.

  (4) In the above-described embodiment, the power storage module including one or two assembled batteries has been described, but the present invention is not limited to this. You may comprise an electrical storage module by the assembled battery 100 of 3 or more.

  (5) The layout of the unit cells 101 with respect to the cooling structure is not limited to the above-described embodiment. For example, you may arrange | position so that the lamination direction of the cell 101 and the extension direction of the cooling pipe 180 may orthogonally cross.

  (6) In the above-described embodiment, the case where three straight pipe portions 181 of the cooling pipe 180 are arranged side by side has been described, but the present invention is not limited to this. Depending on the capacity, number, etc. of the unit cell 101, four or more may be provided, or one, two, or four or more straight pipe portions 181 of the cooling pipes 180 may be provided.

  (7) In the above-described embodiment, the structure in which the cooling structure is thermally connected to the bottom plate 109B of the unit cell 101 has been described, but the present invention is not limited to this. The cooling structure 190 may be thermally connected to the narrow side plate 109N which is the side surface of the battery container arranged along the stacking direction (X direction) of the unit cells 101. Although not shown, a cooling structure may be arranged between the wide side plates 109W of each unit cell 101.

  (8) In the above-described embodiment, the case where an ethylene glycol aqueous solution is employed as the refrigerant has been described, but the present invention is not limited to this. For example, cooling air may be circulated through the refrigerant flow path of the cooling pipe.

  (9) In the above-described embodiment, the shape of the battery container is a square, but the present invention is not limited to this. For example, a flat battery container having an oval cross section may be used.

  (10) Although the lithium ion secondary battery has been described as an example of the storage element, the present invention can also be applied to other secondary batteries such as a nickel metal hydride battery. Furthermore, the present invention can be applied to a power storage module using an electric double layer capacitor or a lithium ion capacitor as a power storage element.

  (11) The material of the heat transfer plate 170 is not limited to aluminum. Various materials having good thermal conductivity such as aluminum alloy, copper, copper alloy, stainless steel, or insulating resin having a thermal conductivity of 1 W / m · K or more can be used.

  (12) The material of the cooling pipe 180 and the heating pipe 180A is not limited to aluminum. Various metal materials having good thermal conductivity such as aluminum alloy, copper, copper alloy, and stainless steel can be used.

  (13) In the above-described embodiment, the bottom plate 109B of the unit cell 101 and the cooling structure 190 are thermally connected via the heat transfer sheet 160, but the present invention is not limited to this. When the battery container of the unit cell 101 has insulating properties, the bottom plate 109B of the battery container of the unit cell 101 may be directly adhered to the cooling structure 190. Instead of the heat transfer sheet 160, a heat conductive gel or a heat conductive adhesive may be provided.

  (14) In the modification of the third embodiment, in the space defined by the recess 178 of the heat transfer plate 170 of the first cooling structure 390A and the recess 178 of the heat transfer plate 170 of the second cooling structure 390B. Although the example filled with the heat conductive substance 150 was demonstrated, this invention is not limited to this. In the modification of the third embodiment, the heat conductive material 150 can be omitted. In the modification of the third embodiment, the heat conductive material 150 may be filled in the recess 172 in which the cooling pipe 180 is not disposed to increase the thermal connection area with the assembled battery 100. . Similarly, in the heat transfer plate 170 of the first embodiment shown in FIG. 5, the concave portion 172 where the cooling pipe 180 is not arranged, or in the heat transfer plate 170 of the third embodiment shown in FIG. The heat conductive material 150 may be filled in the concave portions 172 and the concave portions 178 that are not arranged.

  (15) In the modification example (1) of the first embodiment, the example in which the heating tube 180A is provided has been described. However, in another embodiment, the heating tube 180A may be further provided.

  (16) In the modification (2) of the first embodiment, the example in which the wiring such as the power supply line 186 and the communication line 187 is arranged in the recess 178 has been described. However, the recess 172 in which the cooling pipe 180 is not arranged Wiring may be arranged. In another embodiment, wiring such as the power supply line 186 and the communication line 187 can be arranged in the space between the straight pipe portions 181 of the cooling pipe 180. You may make it hold | maintain wiring by the recessed parts 172,178,472 and the holding piece 577 in which the cooling pipe 180 is not arrange | positioned. Thereby, the holder etc. which hold | maintain wiring can be abbreviate | omitted, and the electrical storage module can be reduced in size, weight, and cost.

  (17) In the third embodiment, the example in which the cooling pipe 180 is disposed in each of the concave portion 172 and the concave portion 178 has been described, but the cooling pipe 180 may be provided in at least one of the concave portion 172 and the concave portion 178. In the modification of the third embodiment, the cooling pipe 180 is disposed only on one of the cooling structures 390A and 390B on the + Z side and the −Z side, and the cooling pipe 180 is not disposed on the other cooling structure. You may do it.

  (18) In the modification of the third embodiment, the example in which the heat transfer plates 170 are stacked has been described. In other embodiments, the heat transfer plates are stacked to increase the heat capacity and increase the strength. It may be.

  (19) In the modification of the fifth embodiment, the example in which the bending rib 579 is formed has been described. However, in another embodiment, a bending rib may be provided to increase the strength.

  The present invention is not limited to the embodiment described above, and can be freely changed and improved without departing from the gist of the invention.

DESCRIPTION OF SYMBOLS 10 Storage module, 100 assembled battery, 101 cell, 104 positive terminal, 105 negative terminal, 108 battery cover, 108A injection plug, 108B gas discharge valve, 109 battery can, 109A opening, 109B bottom plate, 109N narrow side plate, 109W Wide side plate, 120 end plate, 120c convex part, 120h hole, 121 side frame, 121c opening part, 121f flange, 122A intermediate cell holder, 122B end cell holder, 122c convex part, 122h screw hole, 150 thermally conductive material, 160 Heat transfer sheet, 170 Heat transfer plate, 171 Mounting piece, 171h Through hole, 172 Recess, 172b Bottom, 172s Side, 173 Convex, 177 Convex, 178 Concave, 180 Cooling pipe, 180A Heating pipe, 181 Straight pipe 182 folded portion, 186 power line, 87 communication line, 190 cooling structure, 190A cooling structure, 190B cooling structure, 270A heat transfer plate, 275 drainage groove, 390 cooling structure, 390A first cooling structure, 390B second cooling structure, 470 heat transfer Plate, 472 Recess, 490 Cooling structure, 570 Heat transfer plate, 570A Heat transfer plate, 777 Holding piece, 578 Opening, 579 Bending rib, 590 Cooling structure, 590A Cooling structure, 670 Heat transfer plate, 670A End Plate, 670B intermediate plate, 670c first plate heat transfer section, 670d second plate heat transfer section, 670e bending section, 670f first plate heat transfer section, 670h1 bending section, 670h2 bending section, 674 support member, 690 cooling Structure

Claims (10)

A power storage module comprising a power storage element group in which a plurality of power storage elements are electrically connected,
A metal heat transfer tube forming a flow path through which the heat medium flows; and
A heat transfer plate having a holding portion that holds the heat transfer tube and a plate heat transfer portion that is thermally connected to the power storage element;
The heat transfer tube has a tube heat transfer portion that is thermally connected to the power storage element without passing through the heat transfer plate. The power storage module according to claim 1,
The power storage element includes a rectangular container,
The storage element group is formed by stacking the storage elements.
The heat transfer plate is thermally connected to a side surface of the container disposed along the stacking direction of the power storage elements,
The heat transfer tube is characterized in that the heat transfer tube extends from one end of the heat transfer plate to the other end along the stacking direction of the power storage elements. The power storage module according to claim 1,
The power storage element includes a rectangular container,
The storage element group is formed by stacking the storage elements.
The heat transfer plate is thermally connected to a side surface of the container disposed along the stacking direction of the power storage elements,
A plurality of flow paths formed by the heat transfer tubes are provided at predetermined intervals in a direction orthogonal to the stacking direction of the power storage elements, along the stacking direction of the power storage elements,
A power storage module, wherein wiring is provided between straight pipe portions of the plurality of heat transfer tubes. The power storage module according to claim 1,
The power storage element includes a rectangular container,
The storage element group is formed by stacking the storage elements.
The heat transfer plate is thermally connected to a side surface of the container disposed along the stacking direction of the power storage elements,
The heat transfer plate is formed in a zigzag shape along a direction orthogonal to the stacking direction of the power storage elements, and a first plate heat transfer section thermally connected to the first power storage element group is provided on one surface. A second plate heat transfer portion that is provided on the other surface and thermally connected to the second power storage element group;
The holding portion is a recess recessed from the first plate heat transfer portion toward the second plate heat transfer portion and / or from the second plate heat transfer portion toward the first plate heat transfer portion. A power storage module, wherein the power storage module is a concave recess. The power storage module according to claim 1,
Between the plate heat transfer section and the tube heat transfer section, and the power storage element group, a heat transfer sheet having flexibility is disposed,
The heat transfer sheet is in close contact with the plate heat transfer section and the tube heat transfer section and the power storage element group,
The plate heat transfer section and the tube heat transfer section are thermally connected to the power storage element via the heat transfer sheet,
The surface to which the said heat transfer sheet of the said plate heat-transfer part and the said tube heat-transfer part is closely_contact | adhered is roughened in order to increase a heat transfer area. The power storage module according to claim 1,
A plurality of the heat transfer plates;
The power storage module, wherein the plurality of heat transfer plates are stacked. The power storage module according to claim 1,
The heat transfer plate is provided with a plurality of recesses for holding the heat transfer tubes,
One or two or more of the plurality of recesses serve as the holding portion, and the heat transfer tube is held by the recess serving as the holding portion. The power storage module according to claim 1,
A power storage module comprising: a pressure contact member that holds the plate heat transfer unit and the tube heat transfer unit in pressure contact with the power storage element group. The power storage module according to claim 1,
The storage element group is formed by stacking the storage elements.
A power storage module, wherein a drainage groove is provided from one end of the heat transfer plate to the other end along a stacking direction of the power storage elements. The power storage module according to claim 1,
With multiple heat transfer plates,
The holding portion is formed by one heat transfer plate and another heat transfer plate adjacent to the one heat transfer plate,
The heat transfer tube is sandwiched between the one heat transfer plate and the other heat transfer plate in the holding portion.

Images