JP2013218792A - Temperature adjusting mechanism for battery, and vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain deterioration of temperature adjusting efficiency to a battery due to heat exchange with ambient air.SOLUTION: A housing region S1 housing a first battery stack 11 and a second battery stack 12 is formed at a center inside a case 10. A first partition wall 31 for forming a first temperature control flow path 21 in which a heat medium is circulated after circulating through the housing region S1 is provided between the housing region S1 and a first side wall 10b. A first inflow path 24 is formed between the first battery stack 11 and the first partition wall 31. A temperature control device 40 is provided adjacent to the first inflow path 24 via the first partition wall 31. An induction wall 51 as an induction member for inducing the heat medium after passing through the first temperature control flow path 21, i.e., the heat medium heated or cooled by the temperature control device 40 to the first inflow path 24 is formed on a flow path reaching the first inflow path 24 from an outflow portion 23 of the first temperature control flow path 21.

Description

  The present invention relates to a battery temperature adjustment mechanism for adjusting the temperature of a battery by arranging a plurality of batteries and circulating a heat medium through a flow path formed between adjacent batteries in the battery arrangement direction.

  In recent years, there is a demand for charging and discharging a secondary battery (battery) with a large current and increasing the capacity of the secondary battery. However, charging and discharging with a large current accompany large heat generation inside the secondary battery, so that the temperature of the secondary battery rises and promotes deterioration of the performance of the secondary battery. In addition, depending on the secondary battery, the discharge performance deteriorates when the environmental temperature is low. For this reason, it is necessary to adjust the temperature of the secondary battery to a specified temperature. As what controls the temperature of a secondary battery, the temperature control module of patent document 1 is mentioned, for example.

  In this temperature control module, a battery unit is disposed inside the casing. In addition, a thermoelectric cell that heats or cools the heat medium inside the casing and a transfer device that transfers the heat medium heated or cooled by the thermoelectric cell to the battery unit are disposed inside the casing. The temperature of the battery unit is adjusted by the heat medium heated or cooled by the thermoelectric cell.

JP 2009-302054 A

  By the way, while the heat medium heated or cooled by the thermoelectric cell is transferred to the battery unit, heat exchange with the outside air existing outside the casing may cause a reduction in temperature regulation efficiency for the battery unit.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a battery temperature control mechanism that can suppress a decrease in temperature control efficiency of the battery due to heat exchange with the outside air. And providing a vehicle.

  In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a plurality of batteries are arranged side by side, and a heat medium is circulated through a flow path formed between adjacent batteries in the battery arrangement direction. A temperature control mechanism for a battery that adjusts the temperature of a battery, and is provided adjacent to at least one inflow path through which the heat medium flows into the flow path, and heats or cools the heat medium And a guiding member for guiding the heat medium heated or cooled by the temperature adjusting device to the inflow path.

  According to this, the heat medium heated or cooled by the temperature adjusting device is guided to the inflow path by the guide member. Since the inflow path and the temperature control device are adjacent to each other, the heat medium flowing through the inflow path is unlikely to exchange heat with the outside air. Then, the temperature of the battery is adjusted by the heat medium flowing into the flow path from the inflow path. Therefore, it is possible to suppress a decrease in temperature adjustment efficiency for the battery due to heat exchange with the outside air.

  The invention according to claim 2 is the battery temperature adjusting mechanism according to claim 1, wherein the battery is housed in a housing region formed inside the case, and the battery is housed in the case. A pair of inflow passages are formed so as to sandwich the flow path, and a common outflow passage through which the heat medium after flowing through the flow passage flows out is formed between the pair of inflow passages. The gist is that the temperature control devices are arranged adjacent to each other.

  According to this, the outflow path is adjacent to the inflow path by being formed so as to be sandwiched between the pair of inflow paths. Therefore, the heat medium that has flowed out to the outflow path is suppressed from heat exchange with the outside air before reaching the inflow path.

  A third aspect of the present invention is the battery temperature adjusting mechanism according to the first aspect, wherein the battery is housed in a housing region formed inside the case, and the battery is disposed inside the case. The inflow path and an outflow path through which the heat medium after flowing through the flow path flows out are formed, and the temperature control device is disposed adjacent to the inflow path and the outflow path. This is the gist.

  According to this, since the temperature adjusting device is disposed adjacent to the outflow path in addition to the inflow path, heat exchange between the heat medium flowing through the outflow path and the outside air is difficult to be performed. For this reason, it is suppressed that the heat medium which distribute | circulates an outflow channel is heat-exchanged with external air by the time it reaches an inflow channel. Therefore, it can suppress that a heat medium does not become desired temperature by the heating or cooling by a temperature control apparatus.

  Invention of Claim 4 is the temperature control mechanism for batteries of any one of Claims 1-3, Comprising: In the downstream in the distribution direction of the said thermal medium which distribute | circulates the said inflow path. The gist is that the distance between the battery and the temperature control device is shorter.

  According to this, in the inflow channel, the battery disposed on the downstream side in the flow direction of the heat medium is more easily exchanged directly with the temperature adjusting device. For this reason, the battery disposed on the downstream side in the flow direction of the heat medium in the inflow passage is appropriately temperature-regulated even if the temperature adjustment efficiency by the heat medium is lowered compared to the battery disposed on the upstream side. . Therefore, the flow path area can be reduced as the flow path passes through the heat medium that adjusts the temperature of the battery disposed on the downstream side. For this reason, for example, when a battery stack is formed by arranging a plurality of batteries, the battery stack can be reduced in size.

  The invention according to claim 5 is the battery temperature adjusting mechanism according to any one of claims 1 to 4, wherein the temperature adjusting device is configured to absorb heat and dissipate heat according to the polarity of energization. The gist of the present invention is to provide a thermoelectric conversion element having a first surface and a second surface that perform opposing actions.

  According to this, it is possible to change whether the heat medium is heated or cooled by changing the polarity of energization. Therefore, both heating and cooling of the heat medium can be performed with a single temperature control device.

  A sixth aspect of the present invention is a vehicle that travels using a battery as a power source, and the battery is provided with the battery temperature control mechanism according to any one of the first to fifth aspects. The main point is that

  According to this, the temperature of the battery is appropriately adjusted by the battery temperature adjusting mechanism, and the vehicle can appropriately travel with the electric power from the battery.

  ADVANTAGE OF THE INVENTION According to this invention, the fall of the temperature control efficiency with respect to the battery by heat exchange with external air can be suppressed.

The schematic diagram which shows the temperature control mechanism for batteries in 1st Embodiment. The schematic diagram which shows the temperature control mechanism for batteries in 2nd Embodiment. The schematic diagram which shows the temperature control mechanism for batteries of another example. The schematic diagram which shows the temperature control mechanism for batteries of another example.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 1, the battery pack 1 mounted on a vehicle is configured by housing a first battery stack 11 and a second battery stack 12 inside a case 10. The case 10 includes a bottom plate 10a having a square shape in plan view, side walls 10b to 10e standing from four sides of the bottom plate 10a, and a top plate (not shown). The first battery stack 11 is formed by arranging a plurality of first rectangular batteries 13 in the thickness direction of the first rectangular battery 13. The second battery stack 12 is formed by arranging a plurality of second rectangular batteries 14 in the thickness direction of the second rectangular batteries 14. The first rectangular battery 13 and the second rectangular battery 14 are all rectangular batteries having the same dimensions. The battery temperature adjusting mechanism 15 of the present embodiment is provided in the battery pack 1 and adjusts the temperature of the prismatic batteries 13 and 14 by circulating a gaseous heat medium inside the case 10. In the following description, the side wall erected from one side of the bottom plate 10a is the first side wall 10b, and the side wall opposite to the first side wall 10b is the second side wall 10c, and the one side wall intersects the first side wall 10b and the second side wall 10c. The third side wall 10d and the side wall opposite to the third side wall 10d will be described as the fourth side wall 10e.

  In the center of the inside of the case 10, an accommodation area S1 in which the first battery stack 11 and the second battery stack 12 are accommodated is formed. Between the storage area S1 and the first side wall 10b, there is provided a first partition wall 31 for forming a first temperature control channel 21 through which the heat medium after flowing through the storage area S1 flows. The first partition wall 31 is provided substantially parallel to the first side wall 10b. The first partition wall 31 has a length in the longitudinal direction shorter than the length in the longitudinal direction of the first side wall 10b. In the longitudinal direction of both ends of the first partition wall 31, the accommodation region S <b> 1 communicates with the first temperature control channel 21, and the heat medium after flowing through the storage region S <b> 1 flows into the first temperature control channel 21. The outflow part 23 which returns the heat medium which distribute | circulated the part 22 and the 1st temperature control flow path 21 to accommodation area | region S1 is formed.

  The first side wall 10b is provided with a temperature adjustment device 40 that heats or cools the heat medium flowing through the first temperature control flow path 21. The temperature adjustment device 40 is joined to the first surface 41a and a plurality of (three in this embodiment) thermoelectric conversion elements 41 having a first surface 41a and a second surface 41b that perform opposite actions of heat dissipation and heat absorption. It consists of a first heat exchange member 42 and a second heat exchange member 47 joined to the second surface 41b. Each heat exchange member 42, 47 includes a base 43, 48 joined to the first surface 41a and the second surface 41b, and a plurality of fins 44, 49 erected from the base 43, 48. The thermoelectric conversion elements 41 are joined at regular intervals so as to be sandwiched between the base 43 of the first heat exchange member 42 and the base 48 of the second heat exchange member 47.

  A fitting hole 45 into which the base 43 of the first heat exchange member 42 is fitted is formed in the first side wall 10 b, and the base 43 of the first heat exchange member 42 is fitted into the fitting hole 45. As a result, the fins 44 protrude into the first temperature control flow path 21. The space between the base 43 and the fitting hole 45 is sealed to prevent the heat medium from flowing out of the case 10 to the outside of the case 10. A duct 80 having a fitting hole 46 into which the base 48 of the second heat exchange member 47 is fitted is provided outside the case 10, and the base of the second heat exchange member 47 is formed in the fitting hole 46. The fins 49 protrude into the duct 80 due to the fitting of 48.

  Between the 1st battery stack 11 and the 1st partition wall 31, the 1st inflow path 24 to which the heat medium which flowed out from the outflow part 23 of the 1st temperature control flow path 21 is supplied is formed. In the first inflow path 24, an inflow section 25 of the first inflow path 24 is formed on the outflow section 23 side of the first temperature control flow path 21. The heat medium flows through the first inflow path 24 by connecting the outflow section 23 of the first temperature control flow path 21 and the inflow section 25 of the first inflow path 24. In the first battery stack 11 accommodated in the accommodation region S <b> 1, the shortest distance connecting the first rectangular battery 13 and the first partition wall 31 is on the downstream side in the flow direction of the heat medium flowing through the first inflow path 24. It is arranged in an oblique shape so as to become shorter as it approaches. The first inflow path 24 is disposed so that the first battery stack 11 is inclined toward the first partition wall 31, so that the first inflow path 24 is downstream from the upstream side in the flow direction of the heat medium flowing through the first inflow path 24. The channel cross-sectional area perpendicular to the flow direction of the heat medium decreases toward the side.

  The first inflow path 24 is adjacent to the temperature adjustment device 40 via the first partition wall 31. In the first prismatic battery 13, the shortest distance (separation distance) connecting the first prismatic battery 13 and the temperature control device 40 is arranged on the downstream side in the flow direction of the heat medium flowing through the first inflow path 24. The unidirectional battery 13 is shorter.

  The 1st square battery 13 is arrange | positioned at predetermined intervals with the 1st square battery 13 adjacent in the juxtaposition direction. Thereby, the 1st flow path 26 into which the heat carrier which distribute | circulated the 1st inflow path 24 flows in between the 1st square batteries 13 adjacent in the juxtaposition direction of the 1st square battery 13 is formed. The interval between the first prismatic batteries 13 adjacent in the direction in which the first prismatic batteries 13 are juxtaposed decreases from the upstream side to the downstream side in the flow direction of the heat medium flowing through the first inflow path 24. Therefore, the cross-sectional area of the flow path perpendicular to the flow direction of the heat medium flowing through the first flow path 26 becomes shorter from the upstream side to the downstream side in the flow direction of the heat medium flowing through the first inflow path 24. A heat medium heated or cooled in the first temperature control channel 21 is supplied to the first inflow channel 24 between the outflow unit 23 of the first temperature control channel 21 and the inflow unit 25 of the first inflow channel 24. A first blower 27 is disposed.

  On the flow path from the outflow portion 23 of the first temperature control flow path 21 to the first inflow path 24, the heat medium after flowing through the first temperature control flow path 21, that is, heated or cooled by the temperature control device 40. A guide wall 51 is formed as a guide member for guiding the heat medium to the first inflow path 24. The guide wall 51 is integrated with the third side wall 10d, and the leading end of the guide wall 51 is disposed at the most upstream side in the flow direction of the heat medium flowing through the first inflow path 24. 13 abuts.

  And the battery pack 1 of this embodiment becomes symmetrical centering | focusing on the longitudinal direction center of the 3rd side wall 10d and the 4th side wall 10e. More specifically, a second temperature control channel 61 is formed between the storage region S1 and the second side wall 10c facing the first side wall 10b, through which the heat medium after flowing through the storage region S1 flows. A second partition wall 32 is provided. The second partition wall 32 is provided substantially parallel to the second side wall 10c. The length of the second partition wall 32 in the longitudinal direction is shorter than the length in the longitudinal direction of the second side wall 10c. The inflow which flows into the 2nd temperature control flow path 61 with the heat medium which distribute | circulated the accommodation area | region S1 and the 2nd temperature control flow path 61 and distribute | circulated the storage area S1 in the longitudinal direction both ends side of the 2nd partition wall 32 The outflow part 63 which returns the heat medium which distribute | circulated the part 62 and the 2nd temperature control flow path 61 to accommodation area | region S1 is formed.

  The second side wall 10c is provided with a temperature adjustment device 40 that heats or cools the heat medium flowing through the second temperature adjustment flow path 61. The temperature adjustment device 40 has the same configuration as the temperature adjustment device 40 provided on the first side wall 10b.

  Similarly to the first side wall 10b, the second side wall 10c is formed with a fitting hole 45 into which the base portion 43 of the first heat exchange member 42 is fitted. The first heat exchange member is inserted into the fitting hole 45. The fins 44 protrude into the second temperature control flow path 61 by fitting the base portion 43 of 42. The space between the base 43 and the fitting hole 45 is sealed to prevent the heat medium from flowing out of the case 10 to the outside of the case 10. A duct 80 having a fitting hole 46 into which the base 48 of the second heat exchange member 47 is fitted is provided outside the case 10, and the base of the second heat exchange member 47 is formed in the fitting hole 46. The fins 49 protrude into the duct 80 due to the fitting of 48.

  Between the 2nd battery stack 12 and the 2nd partition wall 32, the 2nd inflow path 64 to which the heat medium which flowed out from the outflow part 63 of the 2nd temperature control flow path 61 is supplied is formed. In the second inflow path 64, an inflow section 65 of the second inflow path 64 is formed on the outflow section 63 side of the second temperature adjustment flow path 61. Since the outflow part 63 of the second temperature control channel 61 and the inflow part 65 of the second inflow path 64 communicate with each other, the heat medium flows through the second inflow path 64. In the second battery stack 12 housed in the housing region S1, the shortest distance connecting the second prismatic battery 14 and the second partition wall 32 is on the downstream side in the flow direction of the heat medium flowing through the second inflow path 64. It is arranged in an oblique shape so as to become shorter as it approaches. Accordingly, the first battery stack 11 and the second battery stack 12 are disposed in the accommodation region S1 so as to form a V shape in plan view. The second inflow path 64 is arranged so that the second battery stack 12 is inclined toward the second partition wall 32, so that the second inflow path 64 is downstream from the upstream side in the flow direction of the heat medium flowing through the second inflow path 64. The channel cross-sectional area perpendicular to the flow direction of the heat medium decreases toward the side.

  The second inflow path 64 is adjacent to the temperature adjustment device 40 via the second partition wall 32. In the second prismatic battery 14, the shortest distance (separation distance) connecting the second prismatic battery 14 and the temperature control device 40 is arranged on the downstream side in the flow direction of the heat medium flowing through the second inflow path 64. The square battery 14 is shorter.

  The 2nd square battery 14 is arrange | positioned at predetermined intervals with the 2nd square battery 14 adjacent in the juxtaposition direction. Thereby, a second flow path 66 into which the heat medium flowing through the second inflow path 64 flows is formed between the second rectangular batteries 14. The interval between the second prismatic batteries 14 adjacent to each other in the direction in which the second prismatic batteries 14 are arranged becomes shorter from the upstream side to the downstream side in the flow direction of the heat medium flowing through the second inflow path 64. Accordingly, the cross-sectional area of the flow path perpendicular to the flow direction of the heat medium flowing through the second flow path 66 decreases from the upstream side to the downstream side in the flow direction of the heat medium flowing through the second inflow path 64. Between the outflow part 63 of the 2nd temperature control flow path 61 and the inflow part 65 of the 2nd inflow path 64, the heat medium which distribute | circulated the 2nd temperature control flow path 61 to the 2nd inflow path 64, ie, a temperature control apparatus A second blower 67 that supplies the heat medium heated or cooled by 40 to the second inflow passage 64 is provided.

  On the flow path from the outflow portion 63 to the second inflow path 64 of the second temperature control flow path 61, the heat medium after flowing through the second temperature control flow path 61, that is, the temperature control device 40 is heated or cooled. A guide wall 52 is formed as a guide member that guides the heat medium to the second inflow path 64. The guide wall 52 is integrated with the third side wall 10d, and the leading end of the guide wall 52 is disposed at the most upstream side in the flow direction of the heat medium flowing through the second inflow path 64. 14 abuts.

  Between the first battery stack 11 and the second battery stack 12, a common outflow path 29 through which the heat medium flowing through the first flow path 26 and the second flow path 66 flows is formed. The outflow path 29 is sandwiched between the first inflow path 24 and the second inflow path 64 (a pair of inflow paths 24 and 64). In the outflow path 29, the first battery stack 11 is disposed obliquely toward the first partition wall 31, and the second battery stack 12 is disposed obliquely toward the second partition wall 32. In contrast to the first inflow path 24 and the second inflow path 64, the cross-sectional area perpendicular to the flow direction of the heat medium increases toward the downstream side in the flow direction of the heat medium. . The outflow path 29 communicates with the first inflow path 24 via the first temperature control flow path 21. In addition, the outflow path 29 communicates with the second inflow path 64 via the second temperature adjustment flow path 61. As a result, the heat medium flowing through the outflow path 29 is supplied to the first inflow path 24 and the second inflow path 64.

Next, the operation of the battery temperature adjustment mechanism 15 in this embodiment will be described.
When the battery pack 1 is used, the prismatic batteries 13 and 14 are heated when the environmental temperature is low enough to hinder the discharge of the prismatic batteries 13 and 14, such as in a cold district or winter. Specifically, the first temperature adjustment is performed by energizing the thermoelectric conversion element 41 so that the first surface 41a of the thermoelectric conversion element 41 dissipates heat and the second surface 41b of the thermoelectric conversion element 41 absorbs heat. The heat medium flowing through the flow path 21 and the second temperature control flow path 61 is heated.

  On the other hand, when the temperature of the prismatic batteries 13 and 14 rises so as to hinder discharge due to heat generated by the use of the prismatic batteries 13 and 14, the prismatic batteries 13 and 14 are cooled. Specifically, the first temperature adjustment is performed by energizing the thermoelectric conversion element 41 so that the first surface 41a of the thermoelectric conversion element 41 absorbs heat and the second surface 41b of the thermoelectric conversion element 41 dissipates heat. The heat medium flowing through the flow path 21 and the second temperature control flow path 61 is cooled.

  Then, the heat medium heated or cooled in the first temperature control flow path 21 is supplied to the first inflow path 24 by the first blower 27 and flows through the first inflow path 24. At this time, the heat medium is guided to the first inflow path 24 by the guide wall 51 and appropriately flows into the first inflow path 24. Since the heat medium heated or cooled by the temperature adjusting device 40 reaches the first inflow path 24 at a short distance, it is not easily affected by outside air.

  Further, the heat medium flowing through the first inflow path 24 flows into each first flow path 26 and adjusts the temperature of the first rectangular battery 13. Since the temperature adjusting device 40 is provided adjacent to the first inflow path 24, the heat medium flowing through the first inflow path 24 is not easily exchanged with the outside air existing outside the case 10.

  Therefore, the region in which heat exchanged with the outside air by the heat medium exchanged by the temperature adjusting device 40 flows into the first inflow path 24 is from the outflow portion 23 of the first temperature control path 21 to the first inflow path 24. It is only between the inflow part 25.

  Similarly, the region in which heat exchanged by the temperature control device 40 is exchanged with the outside air before flowing into the second inflow path 64 is from the outflow portion 63 of the second temperature control flow path 61 to the second inflow path. Only between the 64 inflow portions 65.

Therefore, according to the above embodiment, the following effects can be obtained.
(1) The temperature adjusting device 40 is disposed adjacent to the first inflow path 24 through which the heat medium flows into the first flow path 26. And the induction | guidance | derivation wall 51 which guide | induces the heat medium heated or cooled by the temperature control apparatus 40 to the 1st inflow path 24 is formed. Similarly, the temperature adjustment device 40 is disposed adjacent to the second inflow path 64 through which the heat medium flows into the second flow path 66. And the induction | guidance | derivation wall 52 which guide | induces the heat medium heated or cooled by the temperature control apparatus 40 to the 2nd inflow path 64 is formed. For this reason, the heat medium heated or cooled by the temperature adjusting device 40 is guided to the inflow paths 24 and 64 by the guide walls 51 and 52. Therefore, the region in which heat exchanged with the outside air by the heat medium exchanged by the temperature adjusting device 40 flows into the first inflow path 24 is from the outflow portion 23 of the first temperature control path 21 to the first inflow path 24. It is only between the inflow part 25. Similarly, the region in which heat exchanged by the temperature control device 40 is exchanged with the outside air before flowing into the second inflow path 64 is from the outflow portion 63 of the second temperature control flow path 61 to the second inflow path. Only between the 64 inflow portions 65. For this reason, the fall of the temperature control efficiency with respect to the 1st square battery 13 and the 2nd square battery 14 by heat exchange with external air can be suppressed.

  (2) The first inflow path 24 is formed between the first partition wall 31 and the first battery stack 11, and the second inflow path 64 is formed between the second partition wall 32 and the second battery stack 12. . And the temperature control apparatus 40 is arrange | positioned so that each inflow path 24 and 64 may be adjoined. For this reason, compared with the case where the temperature adjusting device 40 is disposed so as to be adjacent to only one of the first inflow path 24 and the second inflow path 64, the heat medium can be efficiently heated or cooled, The temperature adjustment efficiency for the rectangular batteries 13 and 14 is improved.

  (3) The first prismatic battery 13 is arranged such that a separation distance (shortest distance) from the temperature control device 40 is arranged on the downstream side in the flow direction of the heat medium flowing through the first inflow path 24. It is getting shorter. Similarly, the second prismatic battery 14 is arranged such that a separation distance (shortest distance) from the temperature control device 40 is arranged on the downstream side in the flow direction of the heat medium flowing through the second inflow path 64. It is getting shorter. For this reason, in each inflow path 24 and 64, the distance from the temperature control device 40 becomes shorter as the rectangular batteries 13 and 14 disposed on the downstream side in the flow direction of the heat medium, and direct heat exchange is easily performed. Therefore, the square batteries 13 and 14 disposed on the downstream side in the flow direction of the heat medium in each of the inflow channels 24 and 64 have a temperature regulation efficiency by the heat medium as compared with the square batteries 13 and 14 disposed on the upstream side. Even if the temperature is lowered, the temperature is adjusted appropriately. Therefore, the flow passage cross-sectional areas of the flow passages 26 and 66 on the downstream side in the flow direction of the heat medium in the inflow passages 24 and 64 can be reduced. For this reason, the battery stacks 11 and 12 can be downsized, and as a result, the battery pack 1 as a whole can be downsized.

  (4) The temperature adjusting device 40 heats the first temperature control channel 21 and the second temperature control channel 61 by energizing the first surface 41 a and the second surface 41 b of the thermoelectric conversion element 41. Is heated or cooled. For this reason, it is possible to change whether the heat medium is heated or cooled by changing the polarity of energization to the thermoelectric conversion element 41. Therefore, the heating medium can be heated and cooled using a single temperature control device.

  (5) The battery pack 1 mounted on the vehicle is provided with a battery temperature adjusting mechanism 15. For this reason, in a vehicle that travels using a battery as a power source, the temperature of the rectangular batteries 13 and 14 is appropriately adjusted by the battery temperature adjusting mechanism 15, and the vehicle in which the battery pack 1 is mounted is connected to the rectangular batteries 13 and 14. It is possible to travel appropriately with electric power.

  (6) The heat exchange members 42 and 47 are joined to the first surface 41 a and the second surface 41 b of the thermoelectric conversion element 41. For this reason, heat exchange between the first surface 41a and the second surface 41b and the heat medium is promoted.

  (7) The outflow path 29 is formed so as to be sandwiched between the first inflow path 24 and the second inflow path 64, and is adjacent to the first inflow path 24 and the second inflow path 64. For this reason, the area in which the heat medium flowing out to the outflow path 29 exchanges heat with the outside air before reaching the temperature control flow paths 21 and 61 is reduced. Therefore, it is possible to suppress a decrease in temperature adjustment efficiency with respect to the first rectangular battery 13 and the second rectangular battery 14 due to heat exchange with the outside air.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG.
In the embodiment described below, the same components as those in the embodiment described above are denoted by the same reference numerals, and redundant description thereof is omitted or simplified.

  As shown in FIG. 2, a partition wall 72 for forming a communication path 71 communicating with the first temperature control flow path 21 is provided between the accommodation region S1 and the fourth side wall 10e. The partition wall 72 extends from the tip of the first partition wall 31 on the inflow portion 22 side of the first temperature control channel 21 toward the accommodation region S1 so as to be orthogonal to the first temperature control channel 21. The partition wall 72 is substantially parallel to the fourth side wall 10e. In the present embodiment, the second partition wall 32 in the first embodiment is not provided.

  The first battery stack 11 and the second battery stack 12 are disposed in the accommodation region S1. In the present embodiment, the first battery stack 11 and the second battery stack 12 are disposed substantially parallel to the first partition wall 31. Therefore, in the first inflow passage 24 in the present embodiment, the flow passage cross-sectional area in the direction orthogonal to the flow direction of the heat medium is uniform from the upstream side to the downstream side.

  In the present embodiment, the intervals between the first rectangular batteries 13 adjacent to each other in the direction in which the first rectangular batteries 13 are arranged are the same. Therefore, the channel cross-sectional areas orthogonal to the direction in which the heat medium flows in each first channel 26 are the same.

  The 2nd square battery 14 is arrange | positioned so that the 1st square battery 13 may adjoin the width direction. The intervals between the second prismatic batteries 14 adjacent to each other in the direction in which the second prismatic batteries 14 are arranged are the same. Then, the first flow path 26 and the second flow path 66 are adjacent to each other, so that the heat medium flowing through the first flow path 26 flows into the second flow path 66.

  Between the 2nd battery stack 12 and the 2nd side wall 10c, the outflow path 73 into which the heat medium which distribute | circulated each 2nd flow path 66 flows out is formed. The outflow path 73 has a uniform channel cross-sectional area in a direction perpendicular to the flow direction of the heat medium from the upstream side to the downstream side in the flow direction of the heat medium. The outflow passage 73 communicates with the first inflow passage 24 through the communication passage 71. As a result, the heat medium that has flowed through the outflow path 73 is supplied to the first inflow path 24. The temperature adjustment device 40 is disposed adjacent to the outflow path 73. A blower 74 that supplies a heat medium to the communication path 71 is disposed in the outflow path 73.

Next, the operation of the battery temperature adjustment mechanism 15 in this embodiment will be described.
The heat medium heated or cooled by the temperature adjustment device 40 in the first temperature control flow path 21 is supplied to the first inflow path 24 by the first blower 27 and flows through the first inflow path 24. The heat medium flowing through the first inflow path 24 flows into the first flow path 26. At this time, the heat medium is appropriately guided to the first flow path 26 by the partition wall 72. The heat medium flowing through the first flow path 26 flows into the second flow path 66. The heat medium that has flowed through the second flow path 66 flows out to the outflow path 73. The heat medium that has flowed out to the outflow path 73 flows through the communication path 71 after heat exchange by the temperature control device 40.

Therefore, according to the above embodiment, in addition to the effects (1), (4), (5), (6) of the first embodiment, the following effects can be obtained.
(8) The temperature adjustment device 40 is provided so as to be adjacent to the first inflow path 24 via the first partition wall 31. Further, the temperature adjusting device 40 is provided so as to be adjacent to the outflow path 73. When the temperature control device 40 is not provided adjacent to the outflow path 73, the heat medium flowing through the outflow path 73 is heat-exchanged with the outside air. As a result, even if the heat medium is heated or cooled by the first temperature control channel 21, the temperature of the heat medium may not be set to a desired temperature. As in the present embodiment, in addition to the first inflow path 24, the temperature adjusting device 40 is disposed adjacent to the outflow path 73, so that the heat medium that has flowed into the outflow path 73 is converted into the first temperature control path. It is possible to suppress a region where heat is exchanged with the outside air before reaching 21 and to prevent the heat medium heated or cooled in the first temperature control flow path 21 from reaching a desired temperature. The desired temperature is a temperature at which the temperature of the prismatic batteries 13 and 14 can be maintained at a temperature that does not promote deterioration of the prismatic batteries 13 and 14.

(9) A partition wall 72 is formed. For this reason, the heat medium flowing through the first inflow path 24 is appropriately guided to the first flow path 26.
In addition, you may change embodiment as follows.

  In the first embodiment, as shown in FIG. 3, the first rectangular battery 13 is gradually separated from the upstream side toward the downstream side in the flow direction of the heat medium flowing through the first inflow path 24. You may arrange | position so that the shortest distance of 31 and the 1st square battery 13 may become short. Also in this case, the separation distance from the temperature control device 40 becomes shorter as the first rectangular battery 13 disposed on the downstream side in the flow direction of the heat medium in the first inflow path 24. Similarly, the shortest distance between the second partition wall 32 and the second rectangular battery 14 gradually increases from the upstream side to the downstream side in the flow direction of the heat medium flowing through the second inflow path 64. You may arrange | position so that it may become short. Also in this case, the separation distance from the temperature adjustment device 40 becomes shorter as the second rectangular battery 14 disposed on the downstream side in the flow direction of the heat medium in the second inflow path 64.

  In the first embodiment, as shown in FIG. 4, the first rectangular battery 13 disposed on the most upstream side in the flow direction of the heat medium flowing through the first inflow passage 24 and the third side wall 10 d abut. By doing so, the heat medium heated or cooled by the temperature adjusting device 40 may be guided to the first inflow path 24. Similarly, the heat that is heated or cooled by the temperature adjusting device 40 by bringing the second rectangular battery 14 disposed on the most upstream side in the flow direction of the heat medium in the second inflow path 64 into contact with the third side wall 10d. The medium may be guided to the second inflow path 64. In this case, the first prismatic battery 13 and the second prismatic battery 14 disposed on the most upstream side function as induction members.

In 1st and 2nd embodiment, as long as a heat medium can be distribute | circulated inside the case 10, you may change the arrangement | positioning position of the air blowers 27, 67, and 74. FIG.
In the first and second embodiments, the temperature of the prismatic batteries 13 and 14 may be adjusted by circulating a liquid heat medium (for example, cooling water or an organic solvent). In this case, a liquid heat medium is circulated by using a pump instead of the blowers 27, 67 and 74.

In the first and second embodiments, a cylindrical battery or a laminated battery may be used as the battery.
In the first and second embodiments, if the heat medium can be appropriately supplied to the first inflow path 24 and the second inflow path 64 by the first blower 27 and the second blower 67, the guide walls 51 and 52 are not formed. Also good. In this case, the first blower 27 and the second blower 67 function as a guide member.

  In the first and second embodiments, when the heat medium can be sufficiently heated or cooled only by the thermoelectric conversion element 41, the first heat exchange member 42 may not be joined to the first surface 41a. Similarly, the second heat exchange member 47 may not be joined to the second surface 41b.

In 1st and 2nd embodiment, you may use what joined the heat exchange member to heaters, cooling devices, etc. other than the thermoelectric conversion element 41 as a temperature control apparatus.
In the first and second embodiments, the number of battery stacks accommodated in the case 10 may be changed.

In the first and second embodiments, the first inflow path 24, the second inflow path 64, and the outflow path 73 may be formed by a duct or the like.
In the first and second embodiments, the number of thermoelectric conversion elements 41 may be changed.

  DESCRIPTION OF SYMBOLS 13 ... 1st square battery, 14 ... 2nd square battery, 15 ... Temperature control mechanism for batteries, 24 ... 1st inflow path, 26 ... 1st flow path, 31 ... 1st partition wall, 32 ... 2nd partition wall, DESCRIPTION OF SYMBOLS 40 ... Temperature control apparatus, 41 ... Thermoelectric conversion element, 41a ... 1st surface, 41b ... 2nd surface, 42 ... 1st heat exchange member, 47 ... 2nd heat exchange member, 51, 52 ... Induction wall, 64 ... 1st 2 inflow paths, 66... Second flow path.

Claims (6)

A battery temperature adjustment mechanism for adjusting the temperature of the battery by arranging a plurality of batteries and circulating a heat medium through a flow path formed between adjacent batteries in the battery arrangement direction,
One or a plurality of inflow paths for allowing the heat medium to flow into the flow path;
A temperature control device that is provided adjacent to at least one inflow path and that heats or cools the heat medium;
A temperature adjusting mechanism for a battery, comprising: an induction member that guides the heat medium heated or cooled by the temperature adjusting device to the inflow path.   The battery is housed in a housing area formed inside the case, and a pair of inflow passages are formed inside the case so as to sandwich the battery, and the heat medium after flowing through the passage 2. The battery according to claim 1, wherein a common outflow path through which the gas flows out is formed so as to be sandwiched between the pair of inflow paths, and the temperature adjusting device is disposed adjacent to each of the inflow paths. Temperature control mechanism.   The battery is housed in a housing area formed inside the case, and in the case, the inflow path so as to sandwich the battery, and an outflow path through which the heat medium after flowing through the flow path flows out. The battery temperature adjusting mechanism according to claim 1, wherein the temperature adjusting device is disposed adjacent to the inflow path and the outflow path.   4. The battery according to claim 1, wherein a battery disposed closer to the downstream side in the flow direction of the heat medium flowing through the inflow path has a shorter separation distance from the temperature control device. The temperature control mechanism for a battery according to 1.   The temperature control apparatus includes a thermoelectric conversion element having a first surface and a second surface that perform opposite actions of heat absorption and heat dissipation according to the polarity of energization. The temperature control mechanism for a battery according to claim 1. A vehicle that travels using a battery as a power source,
A vehicle, wherein the battery is provided with the battery temperature adjusting mechanism according to any one of claims 1 to 5.