JP7052578B2 - Power storage device - Google Patents

Description

The present disclosure relates to a power storage device.

The bipolar battery described in JP-A-2011-151016 includes a plurality of stacked bipolar electrodes and a resin portion formed on the outer peripheral edge portion of each bipolar electrode.

Japanese Unexamined Patent Publication No. 2011-151016 describes that when the above bipolar battery is used as a power storage device for a hybrid vehicle, an electric vehicle, a fuel cell vehicle, or the like, a plurality of bipolar batteries are connected in series. ing.

Japanese Unexamined Patent Publication No. 2011-151016

When connecting multiple bipolar batteries electrically, by arranging each bipolar battery in one direction and arranging a metal plate between the adjacent bipolar batteries, the adjacent bipolar batteries are electrically connected. Can be considered.

In a power storage device in which a plurality of bipolar batteries are electrically connected as described above, each bipolar battery generates heat during charging / discharging of electric power, and the temperature of the power storage device rises.

Charging and discharging of the power storage device is a chemical reaction in the power storage device, and the chemical reaction rate in the power storage device is greatly affected by the temperature of the power storage device. Furthermore, if the temperature of the power storage device is too high, the power storage device deteriorates. Invite. Therefore, in order to cool the power storage device, it is conceivable to form a cooling passage in the metal plate and allow the refrigerant to flow in the cooling passage to cool the power storage device.

Further, it is conceivable to provide the power storage device with a temperature sensor for measuring the temperature of the power storage device. Since the surface of the power storage device is exposed to the outside air, the surface temperature of the power storage device tends to be lower than the internal temperature of the power storage device. Therefore, since the temperature of the power storage device varies depending on the position, it is necessary to arrange the temperature sensor at a predetermined desired position in the power storage device.

However, if an attempt is made to insert the temperature sensor into the power storage device from the outside of the power storage device after stacking the power storage units such as bipolar batteries, it is difficult to accurately arrange the temperature sensor at a desired position in the power storage device.

The present disclosure has been made in view of the above-mentioned problems, and an object thereof is a plurality of power storage units arranged in one direction and a cooling plate arranged between the power storage units and through which a refrigerant flows. It is an object of the present invention to provide a power storage device in which the temperature sensor can be easily arranged at a desired position.

The power storage device according to the present disclosure is arranged between a plurality of power storage units arranged in one direction and the power storage units so that the refrigerant can be circulated and the adjacent power storage units are electrically connected. It includes a conductive cooling plate and a temperature sensor provided on the cooling plate. The cooling plate is formed with an accommodating portion for accommodating the temperature sensor.

According to the above-mentioned power storage device, the temperature sensor can be easily attached to the cooling plate by arranging the temperature sensor in the accommodating portion of the cooling plate, and the temperature sensor can be arranged at a desired position. Further, the temperature sensor can be attached to the cooling plate in advance, and the cooling plate and the power storage unit are sequentially laminated to create a power storage device, and the production of the power storage device can be simplified.

According to the power storage device according to the present disclosure, in a power storage device provided with a plurality of power storage units arranged in one direction and a cooling plate arranged between the power storage units and through which a refrigerant flows, the preparation of the power storage device is simplified. Can be achieved.

It is a perspective view which shows the structure of a power storage module 1 and its surroundings. It is an exploded perspective view which shows the power storage device 3. It is an exploded perspective view which shows the storage stack 25. It is sectional drawing which shows the power storage unit 57. It is a side view which shows the storage stack 25 and the long side plate 34 when viewed from the long side surface 14 side. It is sectional drawing which shows the electric power storage device 3, and is the sectional drawing at the position which passes through a cooling plate 58E. It is a perspective view which shows typically the cooling plate 58E. It is an exploded perspective view which shows typically the cooling plate 58E. It is a perspective view which shows typically the cooling plate 200 which is a 1st modification of a cooling plate 58. It is a side view schematically showing a part of the storage stack 25A in which the cooling plate 200 is arranged. It is an exploded perspective view which shows typically the cooling plate 300 which is the 2nd modification of a cooling plate. It is a side view which shows typically the cooling plate 300. It is a side view which shows a part of the storage stack 25B in which a cooling plate 300 is arranged.

The power storage device according to the present embodiment will be described with reference to FIGS. 1 to 13. Of the configurations shown in FIGS. 1 to 13, the same or substantially the same configuration is designated by the same reference numerals and duplicated description will be omitted. In the configuration shown in the embodiment, the configuration of the claim may be described together in parentheses for the configuration corresponding to the configuration described in the claim.

FIG. 1 is a perspective view showing the configuration of the power storage module 1 and its surroundings. The power storage module 1 according to the present embodiment is provided on the upper surface of the floor panel 100 of the vehicle.

The power storage module 1 includes a base plate 2, a power storage device 3, a blower 4, a cooling duct 5, a junction box 6, and a monitoring unit 7.

The base plate 2 is fixed to the upper surface of the floor panel 100. The power storage device 3 is formed in a substantially rectangular parallelepiped shape. The power storage device 3 includes a lower surface 10, an upper surface 11, an end side surface 12, an end side surface 13, and long side surfaces 14 and 15. The end side surface 12 and the end side surface 13 are arranged in the longitudinal direction L of the power storage device 3, and the long side surface 14 and the long side surface 15 are arranged in the width direction W of the power storage device 3.

The blower 4 and the junction box 6 are provided on the end side surface 12 side of the power storage device 3. The junction box 6 is arranged between the blower 4 and the power storage device 3.

The blower 4 includes a hollow case 8 and a fan 9 housed in the case 8. The case 8 is formed with an intake port 8a and a supply port 8b. The supply port 8b is open toward the end side surface 12 of the power storage device 3.

One end of the cooling duct 5 is connected to the supply port 8b of the blower 4, and the other end of the cooling duct 5 is connected to the end side surface 12 of the power storage device 3. The supply port 8b is located above the junction box 6, and the cooling duct 5 passes above the junction box 6 and is connected to the power storage device 3.

Then, by driving the fan 9, air is sucked from the intake port 8a, and the cooling air is supplied into the power storage device 3 through the supply port 8b and the cooling duct 5.

A power terminal 16 and a power terminal 17 are provided on the end side surface 12 of the power storage device 3. The power wiring 18 is connected to the power terminal 16, and the power wiring 19 is connected to the power terminal 17. The power wirings 18 and 19 are connected to the junction box 6.

The monitoring unit 7 is arranged on the end side surface 13 side of the power storage device 3, and a plurality of wirings 20 are connected to the monitoring unit 7.

FIG. 2 is an exploded perspective view showing the power storage device 3. The power storage device 3 includes a power storage stack 25, a power storage case 26, and insulating members 27 and 28.

The power storage case 26 houses the power storage stack 25 and the insulating members 27 and 28 inside. The power storage case 26 includes a bottom plate 30, a top plate 31, end side plates 32, 33, and long side plates 34, 35. In FIGS. 1 and 2, the bottom plate 30 is arranged on the lower surface 10 of the power storage device 3, and the top plate 31 is arranged on the upper surface 11. The end side plates 32 and 33 are arranged on the end side surfaces 12 and 13, and the long side plates 34 and 35 are arranged on the long side surfaces 14 and 15. The bottom plate 30, the top plate 31, the end side plates 32, 33, and the long side plates 34, 35 are made of iron or the like.

Returning to FIG. 2, a plurality of openings 40 are formed on the side surface of the end side plate 32. The cooling duct 5 shown in FIG. 1 is inserted into the opening 40A located on the longest side plate 34 side among the plurality of openings 40. A plurality of openings 41 are also formed in the end side plate 33, and a plurality of openings 43 are also formed in the long side plate 35. One opening 42 is formed in the long side plate 34, and this opening 42 is formed in the vicinity of the end side plate 33.

The bottom plate 30 and the top plate 31 are formed in a plate shape. The bottom plate 30 and the top plate 31 are fixed to the end side plates 32, 33 and the long side plates 34, 35 by a plurality of bolts 45, 46.

The insulating member 27 is provided on the upper surface of the bottom plate 30, and the insulating member 28 is provided on the lower surface of the top plate 31. The storage stack 25 is arranged between the insulating member 27 and the insulating member 28, and the insulating members 27 and 28 ensure the insulating property between the storage stack 25 and the bottom plate 30 and the top plate 31.

The storage stack 25 is formed in a substantially rectangular parallelepiped shape. The storage stack 25 includes a lower surface 60, an upper surface 61, end side surfaces 62, 63, and long side surfaces 64, 65. The power terminals 16 and 17 are formed on the end side surface 62.

FIG. 3 is an exploded perspective view showing the storage stack 25. The storage stack 25 includes current collector plates 55 and 56, a plurality of storage units 57, and a plurality of cooling plates 58.

The current collector plate 55 is arranged on the lower surface 60 of the storage stack 25, and the current collector plate 56 is arranged on the upper surface 61 of the storage stack 25. The current collector plate 55 and the current collector plate 56 are formed in a plate shape. The power terminal 16 is connected to the side of the current collector plate 55 located on the end side surface 62 side. The power terminal 17 is connected to a side portion of the outer periphery of the current collector plate 56 located on the end side surface 62 side.

A plurality of power storage units 57 and cooling plates 58 arranged in the height direction H are arranged between the current collector plate 55 and the current collector plate 56.

A plurality of power storage units 57 are arranged at intervals in the height direction (one direction) H, and a cooling plate 58 is arranged between the power storage units 57. Further, the cooling plate 58 is arranged on the upper surface of the current collector plate 55 and also on the lower surface of the current collector plate 56. The cooling plate 58 is made of a metal such as aluminum or copper, and electrically connects the storage units 57 adjacent to each other in the height direction H in series.

FIG. 4 is a cross-sectional view showing the power storage unit 57. The power storage unit 57 includes a plurality of bipolar electrode plates 75, a frame body 76, and a plurality of separators 83. The bipolar electrode plates 75 are arranged at intervals in the height direction H, and the separator 83 is arranged between the bipolar electrode plates 75.

Each bipolar electrode plate 75 includes an electrode plate 77, a positive electrode layer 78, and a negative electrode layer 79. The electrode plate 77 is made of a metal material such as nickel. The negative electrode layer 79 contains a negative electrode active material, and a hydrogen adsorption alloy or the like is adopted as the negative electrode active material. The positive electrode layer 78 contains a positive electrode active material, and nickel hydroxide or the like is adopted as the positive electrode active material. The outer peripheral edge portion 80 of the electrode plate 77 is an uncoated portion in which the positive electrode layer 78 and the negative electrode layer 79 are not formed.

The frame body 76 includes the frame body 81 and the frame body 82. The frame body 81 is formed so as to cover the outer peripheral edge portion 80 of the electrode plate 77, and the frame body 81 is formed in an annular shape along the outer peripheral edge portion 80.

The frame body 81 is provided on each electrode plate 77, and a plurality of frame bodies 81 are arranged in the height direction H. Then, the frame body 82 is engaged with the frame body 81 located on the upper end side of the power storage unit 57, and is engaged with the frame body 81 located on the lower end side of the power storage unit 57. Further, the frame body 82 is formed so as to cover the peripheral surface of the laminated frame bodies 81.

The separator 83 is formed in a sheet shape. The separator 83 is formed of, for example, a woven fabric made of a porous film made of a polyolefin resin or the like, a non-woven fabric or the like.

In the power storage unit 57 configured as described above, the accommodation space 84 is formed by the electrode plates 77 adjacent to each other in the height direction H and the frame body 81.

A separator 83, a positive electrode layer 78, a negative electrode layer 79, and an electrolytic solution (not shown) are arranged in the accommodation space 84. The electrolytic solution is, for example, an alkaline solution such as an aqueous solution of potassium hydroxide.

The storage cell 85 is formed by the separator 83, the negative electrode layer 79, the positive electrode layer 78, and the electrolytic solution. A plurality of storage cells 85 are arranged in the height direction H, and each storage cell 85 is connected in series by an electrode plate 77.

FIG. 5 is a side view showing the storage stack 25 and the long side plate 34 when viewed from the long side surface 14 side. In FIG. 5, a part of the long side plate 34 is omitted.

A plurality of cooling passages 88 are formed in each of the cooling plates 58A, 58B, 58C, 58D, 58E, 58F, 58G, 58H, 58I of the storage stack 25 from the end side surface 62 side to the end side surface 63 side. One opening of the cooling passage 88 is located on the long side surface 64 and the other opening is located on the long side surface 65.

Temperature sensors 87A, 87B, 87C, 87D, 87E, 87F, 87G, 87H, 87I are inserted into each of the cooling plates 58A, 58B, 58C, 58D, 58E, 58F, 58G, 58H, 58I, and each temperature. Wiring 20 is connected to the sensors 87A, 87B, 87C, 87D, 87E, 87F, 87G, 87H, 87I. Each wiring 20 is drawn out from each cooling passage 88 to the long side surface 64, and then extends from the end side surface 62 side toward the end side surface 63 side. Then, it is pulled out from the opening 42 of the long side plate 34.

FIG. 6 is a cross-sectional view showing the power storage device 3, and is a cross-sectional view at a position passing through the cooling plate 58E. The storage stack 25 is arranged at a distance from the storage case 26, and a gap is formed between the long side surface 64 of the storage stack 25 and the inner wall surface of the long side plate 34. Then, the cooling air C is supplied to the above gap from the cooling duct 5 inserted into the opening 40A of the end side plate 32. As described above, the gap formed between the long side surface 64 and the long side plate 34 of the storage stack 25 functions as the ventilation passage 90. The cooling air C supplied from the cooling duct 5 into the ventilation passage 90 enters the cooling passage 88 through the opening of the cooling passage 88 located on the long side surface 64.

The cooling air C flows in the cooling passage 88 to cool the cooling plate 58 and the power storage unit 57 adjacent to each other in the height direction H. Then, the cooling air C is blown out from the opening on the long side surface 65 side, and is exhausted to the outside of the power storage device 3 from the opening 43 on the long side plate 35 and the like.

FIG. 7 is a perspective view schematically showing the cooling plate 58E, and FIG. 8 is an exploded perspective view schematically showing the cooling plate 58E.

The cooling plate 58E includes a main plate 91E and a closing plate 92E. The main plate 91E includes a bottom plate 93E, side walls 94E, 95E, and a plurality of partition walls 96E. The bottom plate 93E is formed in a substantially rectangular shape.

The outer peripheral edge portion of the bottom plate 93E includes two long sides 97E and 98E arranged in the longitudinal direction L, and each long side 97E and 98E is formed so as to extend in the width direction W.

The side wall 94E is connected to the long side 97E and is formed so as to extend upward from the long side 97E.

Similarly, the side wall 95E is connected to the long side 98E and is formed so as to extend upward from the long side 98E.

The plurality of partition walls 96E are formed on the upper surface of the bottom plate 93E, and are formed at intervals in the longitudinal direction L between the side wall 94E and the side wall 95E. The side walls 94E, 95E and each partition wall 96E are formed so as to extend in the width direction W, and the height of the side walls 94E, 95E and the height of the partition wall 96E coincide with or substantially coincide with each other. There is.

A groove 99 is formed between the side wall 94E and the partition wall 96E, between each partition wall 96E, and between the partition wall 96E and the side wall 95E. Each groove portion 99 is also formed so as to extend in the width direction W.

A temperature sensor 87E is arranged in one of the plurality of groove portions 99A. The temperature sensor 87E is sandwiched by two partition walls 96E forming the groove portion 99A and is adhered to the bottom plate 93E. Therefore, the temperature sensor 87E is prevented from being displaced in the groove 99A.

The closing plate 92E includes a top plate 110E and side walls 111E and 112E. The top plate 110E is formed in a substantially rectangular shape, and the top plate 110E includes long sides 113E and 114E arranged in the longitudinal direction L, and each long side 113E and 114E is formed so as to extend in the width direction W. There is.

The side wall 111E is connected to the long side 113E and is formed so as to extend downward from the long side 113E. The side wall 112E is connected to the long side 114E and is formed so as to extend downward from the long side 114E.

In FIG. 7, the block plate 92E is arranged so as to cover the main plate 91E from above the main plate 91E. The side wall 111E of the blocking plate 92E is arranged on the outer side surface side of the side wall 94E, and the side wall 111E is welded to the side wall 94E.

The side wall 112E of the blocking plate 92E is arranged on the outer side surface side of the side wall 95E, and the side wall 112E is welded to the side wall 95E.

By arranging the closing plate 92E on the main plate 91E in this way, the top plate 110E comes into contact with the upper side of the side walls 94E and 95E and the upper side of each partition wall 96E. In this way, when the top plate 110E comes into contact with the side walls 94E and 95E and each partition wall 96E, the opening of the groove portion 99E that opens upward is closed, and the cooling passage 88 is formed. The cooling passage 88 is open to the outside at both ends in the width direction W.

Here, even in the groove portion 99A in which the temperature sensor 87E is arranged, the cooling passage 88A is formed by arranging the top plate 110E.

That is, the cooling passage 88A is an accommodating portion for accommodating the temperature sensor 87E, and the cooling plate 58E includes a cooling passage 88A as an accommodating portion for accommodating the temperature sensor 87E.

The temperature sensor 87E is arranged in the central portion in the width direction W in the cooling passage 88A. In FIG. 2, since the outer peripheral surface of each power storage unit 57 is in contact with air, the temperature is unlikely to rise even during charging and discharging, and the central portion of the power storage unit 57 has a higher temperature than the outer peripheral surface of the power storage unit 57. Easy to become.

On the other hand, as shown in FIG. 6 and the like, the temperature sensor 87E is also arranged in the central portion of the cooling plate 58E in the width direction W, so that the portion of the power storage unit 57 where the temperature tends to be relatively high is relatively high. The temperature can be measured.

As described above, in order to form the cooling plate 58E in which the temperature sensor 87E is mounted in the cooling passage 88A, first, as shown in FIG. 8, the groove portion is formed in a state where the closing plate 92E is not welded to the main plate 91E. The temperature sensor 87E is inserted into the 99A. Then, the temperature sensor 87E is adhered to the bottom plate 93E. Further, the wiring 20 connected to the temperature sensor 87E is arranged along the groove portion 99A, and is pulled out from the end portion of the groove portion 99A on the W side in the width direction to the outside.

After that, the block plate 92E is welded to the main plate 91E. In this way, the cooling plate 58E to which the temperature sensor 87E is attached can be easily formed.

Further, when the temperature sensor 87E is mounted in the groove 99A, the temperature sensor 87E can be inserted at any position of the groove 99A over the width direction W, and the mounting position of the temperature sensor 87E is appropriately set. be able to. Therefore, by arranging the temperature sensor 87E in the center of the groove 99A in the width direction W, the temperature sensor 87E can be easily arranged in the center of the cooling passage 88A in the width direction W.

As described above, in the power storage device 3 according to the present embodiment, the temperature sensor 87E is mounted on the cooling passage 88A as the accommodating portion formed in the cooling plate 58E, and the temperature sensor 87E can be easily placed at a desired position. Can be attached.

In FIG. 5, each cooling plate 58A, 58B, 58C, 58D, 58F, 58G, 58H, 58I has the same configuration as the cooling plate 58E, and each temperature sensor 87A, 87B, 87C, 87D, 87F, The cooling plates 58A, 58B, 58C, 58D, 58F, 58G, 58H, 58I to which the 87G, 87H, 87I are attached at desired positions can be easily formed.

Then, when the storage stack 25 is created, the cooling plates 58A, 58B, in which the temperature sensors 87A, 87B, 87C, 87D, 87E, 87F, 87G, 87H, 87I are previously mounted on the cooling passage (accommodation portion) 88, Prepare 58C, 58D, 58E, 58F, 58G, 58H, 58I. Then, the plurality of cooling plates 58A, 58B, 58C, 58D, 58E, 58F, 58G, 58H, 58I and the plurality of storage units 57 are alternately laminated between the current collector plate 55 and the current collector plate 56. This makes it possible to create the storage stack 25. As a result, the power storage device 3 can be easily created.

(Modification 1)
FIG. 9 is a perspective view schematically showing the cooling plate 200, which is a first modification of the cooling plate 58. The cooling plate 200 is formed by bending a metal plate such as aluminum or copper.

The cooling plate 200 includes an upper surface 201 and a lower surface 202. On the upper surface 201, a plurality of groove portions 204 extending in the width direction W are formed at intervals in the longitudinal direction L. The groove portion 204 is formed so as to open upward.

Grooves 205 extending in the width direction W are formed on the lower surface 202 at intervals in the longitudinal direction L. The groove 205 is formed so as to open downward. Then, in the longitudinal direction L, the groove portions 204 and the groove portions 205 are arranged alternately. In the example shown in FIG. 9, the temperature sensor 87 is arranged in the groove portion 204A.

The cooling plate 200 includes a plurality of side walls 206, a plurality of upper walls 207, and a plurality of lower walls 208.

The plurality of side walls 206 are arranged at intervals in the longitudinal direction L. The upper wall 207 and the lower wall 208 are provided alternately in the longitudinal direction L. The upper wall 207 connects the upper sides of the side wall 206s adjacent to each other in the longitudinal direction L, and the groove portion 205 is formed by the upper wall 207 and the two side walls 206. The lower wall 208 connects the lower side portions of the side wall 206s adjacent to each other in the longitudinal direction L, and the groove portion 204 is formed by the lower wall 208 and the two side walls 206.

Then, in the example shown in FIG. 9, the temperature sensor 87 is arranged in the groove portion 204A. When the temperature sensor 87 is attached to the cooling plate 200, the temperature sensor 87 is adhered to the upper surface of the lower wall 208 in the groove portion 204A, and the wiring 20 is routed along the groove portion 204A to the outside of the cooling plate 200. Pull out. As described above, the temperature sensor 87 can be easily attached to the desired position even in the cooling plate 200. In the example shown in FIG. 9, the groove portion 204A functions as a housing portion for accommodating the temperature sensor 87.

FIG. 10 is a side view schematically showing a part of the storage stack 25A in which the cooling plate 200 is arranged. As shown in FIG. 10, the cooling passage 210 is formed by the power storage unit 57 arranged on the upper surface side of the cooling plate 200 and the groove portion 204. A cooling passage 210A is formed by the groove portion 204A and the power storage unit 57, and the temperature sensor 87 is arranged in the cooling passage 210A.

The cooling passage 211 is formed by the power storage unit 57 arranged on the lower surface side of the cooling plate 200 and the groove 205.

The storage stack 25A thus formed can be formed by alternately stacking the cooling plate 200 to which the temperature sensor 87 is attached and the storage unit 57, and the storage stack 25A to which the plurality of temperature sensors 87 are attached can be formed. The stack 25A can be easily formed.

(Second modification)
FIG. 11 is an exploded perspective view schematically showing the cooling plate 300, which is a second modification of the cooling plate. The cooling plate 300 includes a cooling plate 200, a closing plate 301 arranged on the upper surface side of the cooling plate 200, and a closing plate 302 arranged on the lower surface side of the cooling plate 200.

Similar to the first modification described above, the cooling plate 200 has a plurality of groove portions 204 formed on the upper surface side, a plurality of groove portions 205 formed on the lower surface side, and the temperature sensor 87 has the temperature sensor 87 in the groove portion 204A. Have been placed.

FIG. 12 is a side view schematically showing the cooling plate 300. In the cooling plate 300, a plurality of cooling passages 310 are formed by the groove portion 204 formed in the cooling plate 200 and the closing plate 301, and cooling is performed by the groove portion 205 formed in the cooling plate 200 and the closing plate 302. A passage 311 is formed. Therefore, in the cooling plate 300, the temperature sensor 87 is arranged in the cooling passage 310A formed by the groove portion 204A and the closing plate 301. That is, the cooling passage 310A functions as an accommodating portion for accommodating the temperature sensor 87.

When forming the cooling plate 300 in which the temperature sensor 87 is housed, the temperature sensor 87 is arranged in the groove portion 204A of the cooling plate 200, and then the closing plate 301 and the closing plate 302 are attached to the cooling plate 200.

In this way, the cooling plate 300 in which the temperature sensor 87 is arranged at a desired position in the cooling passage 310A can be easily created.

FIG. 13 is a side view showing a part of the storage stack 25B in which the cooling plate 300 is arranged. As shown in FIG. 12, the storage stack 25B can be formed by sequentially stacking the cooling plate 300 on which the temperature sensor 87 is arranged and the storage unit 57, and the storage stack 25B can be easily created. Can be done. As described above, the power storage device of the present embodiment includes a plurality of power storage modules arranged in one direction, a cooling plate arranged between the power storage modules and formed with a cooling passage through which a refrigerant can flow, and cooling. A temperature sensor provided on the plate, and the cooling plate includes a main plate in which a groove is formed, and the main plate cooperates with the surface of the power storage module to form a cooling passage or is provided on the cooling plate. A cooling passage is formed in cooperation with the closing plate, and the temperature sensor is arranged in the groove. Therefore, in the present embodiment, the temperature sensor can be provided in the power storage device by a simple process of inserting the temperature sensor into the groove formed in the main plate of the cooling plate.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of claims and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 power storage module, 2 base plate, 3 power storage device, 4 blower, 5 cooling duct, 6 junction box, 7 monitoring unit, 8 cases, 8a intake port, 8b supply port, 9 fan, 10, 60, 202 bottom surface, 11, 61,201 Top surface, 12, 13, 62, 63 end side surface, 14, 15, 64, 65 long side surface, 16,17 power terminal, 18,19 power wiring, 20 wiring, 25, 25A, 25B storage stack, 26 storage Case, 27,28 insulation member, 30,93,93E bottom plate, 31,110E top plate, 32,33 end side plate, 34,35 long side plate, 40,40A, 41,42,43 opening, 45,46 bolts, 55,56 collector plate, 57 power storage unit, 58,58A, 58B, 58C, 58D, 58E, 58F, 58G, 58H, 58I, 200,300 cooling plate, 75,77 electrode plate, 76,81,82 frame , 78 Positive electrode layer, 79 Negative electrode layer, 80 outer peripheral edge, 83 separator, 84 accommodation space, 85 storage cell, 87, 87A, 87B, 87C, 87D, 87E, 87F, 87G, 87H, 87I temperature sensor, 88, 88A , 210, 210A, 211, 310, 310A, 311 Cooling passage, 90 ventilation passage, 91E main plate, 92E, 301, 302 blocking plate, 94E, 95E, 111E, 112E, 206 side wall, 96E partition wall, 97E, 98E, 113E , 114E long side, 99,99A, 99E, 204,204A, 205 groove, 100 floor panel, 207 upper wall, 208 lower wall, C cooling air, H height direction, L longitudinal direction, W width direction.

Claims (1)

With multiple power storage units arranged in one direction,
A conductive cooling plate that is arranged between the power storage units, is formed so that the refrigerant can flow, and electrically connects the adjacent power storage units.
The temperature sensor provided on the cooling plate and
Equipped with
A plurality of the cooling plates are provided, and the cooling plates are provided.
A plurality of cooling passages are formed in each of the cooling plates.
Each of the plurality of cooling passages is formed so as to extend in a first direction intersecting the one direction.
The plurality of cooling passages are formed so as to be arranged in one direction and a second direction intersecting with the first direction.
A plurality of the temperature sensors are provided in the power storage unit, and the temperature sensors are provided in the power storage unit.
Each of the temperature sensors is arranged in the cooling passage, and the temperature sensor is arranged in the cooling passage.
A power storage device in which a cooling passage provided with a temperature sensor is arranged so as to shift toward the second direction side as the temperature sensor is provided from one end side to the other end side of the power storage unit in the one direction .

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