JP5049635B2 - Battery cooling system - Google Patents

Description

  The present invention relates to a battery cooling device for cooling a battery used in an electric vehicle, an electric device, a work machine, and the like.

  For example, a plurality of batteries that supply electric power to a driving motor for driving an electric vehicle are cooled by a battery cooling device as described in Patent Document 1 or 2, thereby preventing deterioration in performance. Is done. At this time, each battery needs to be cooled uniformly.

  An example of such a battery cooling device is shown in FIG. A plurality of batteries 102 are housed in the battery box 101 of the battery cooling device 100. Air (outside air) is led from the air duct 104 to the air intake duct 103 of the battery box 101, and this air is introduced from the air intake duct 103 into the ventilation path 110 between the plurality of batteries 102, thereby cooling the batteries 102. The The air whose temperature has risen due to the cooling of the battery 102 is discharged into the atmosphere from the exhaust port 111 in the exhaust duct 105 of the battery box 101.

In the battery cooling device 100, since the plurality of batteries 102 need to be uniformly cooled as described above, the air stagnation area W needs to be reduced in the intake duct 103. This is because the air flow becomes insufficient in the stagnation region W, and the cooling capacity of the battery 102 is reduced.
JP-A-7-237457 JP 11-195437 A

  However, when the longitudinal direction S of the air duct 104 is aligned with the longitudinal direction R of the air intake duct 103 and the air duct 104 is connected to the connection port 106 formed in the air introduction portion 108 of the air intake duct 103, The stagnation region W1 is generated in the long range of the dimension L0 from the air inlet 107 of the air duct 104 over the entire length of each of the air duct 104 and the air introduction part 108.

  The stagnation area W1 along the flow direction B of the air flowing through the blower duct 104 and the air introduction unit 108 is prevented from reaching the area corresponding to the battery 102 in the intake duct 103 to ensure the cooling uniformity of the plurality of batteries 1. In order to achieve this, the sum of the length M0 in the longitudinal direction R of the air introduction portion 108 that does not correspond to the battery 102 in the intake duct 103 and the length N in the longitudinal direction S of the blower duct 104 is calculated as the sum of the air in the stagnation region W1. It is necessary to set it to the dimension L0 or more along the flow direction B. For this reason, there was a problem that the battery cooling device 100 could not be made compact.

  The stagnation region W is also generated as a stagnation region W2 in a portion 109 where the flow path cross-sectional area changes rapidly in the intake duct 103.

  An object of the present invention is to provide a battery cooling device that can realize the compactness of the device and the cooling uniformity of a plurality of batteries.

The present invention provides a battery cooling device that cools the battery by introducing air into a battery box that houses a plurality of batteries, and the battery box includes an intake air that guides air to a side surface on the wide area side of each battery. with the duct are provided, the air duct for introducing air into the intake duct, the air introducing portion is a portion that does not correspond to the battery in the intake duct, provided substantially perpendicular to the longitudinal direction of the intake duct, the The air introduction part is configured such that a length along a longitudinal direction of the intake duct is longer than a stagnation region generated in the air introduction part .

According to the present invention, in the battery cooling device that cools the battery by guiding air into a battery box that houses a plurality of batteries, the air is supplied to the side of the battery on the wide area side of the battery box. An intake duct for guiding and an exhaust duct for discharging the air in the battery box are provided, and the openings of the intake duct and the exhaust duct are arranged on the same side, and the height of the exhaust duct is the height of the exhaust duct. Air that is set to 1.4 times the height of the intake duct, the flow passage cross-sectional area of the exhaust duct is set larger than the flow passage cross-sectional area of the intake duct, and is the portion of the intake duct that does not correspond to the battery The introduction part is provided with a blower duct for introducing air into the intake duct substantially perpendicular to the longitudinal direction of the intake duct, Air introduction unit has a length in the longitudinal direction of the intake duct, it is characterized in that it has been configured longer than the stagnation area generated in the air introduction portion.

  According to the present invention, the battery box that houses the battery is provided with the intake duct that guides air to the side surface on the large area side of the battery, and the air duct that introduces air into the intake duct is the longitudinal length of the intake duct. The air introduced from the air duct into the intake duct collides with the wall surface at the bent portion near the connection between the air duct and the air intake duct and reverses the flow direction. And flows downstream in the intake duct. For this reason, the stagnation area | region which generate | occur | produces in an intake duct when a pressure becomes high reduces in the flow direction of air. As a result, it is possible to suppress the non-uniform cooling between the plurality of batteries due to the influence of the stagnation, to ensure the cooling uniformity of the plurality of batteries, and to shorten the longitudinal dimension of the intake duct and the exhaust duct. The compactness can be realized.

  Further, according to the present invention, the battery box is provided with the intake duct for guiding the air to the side surface on the wide area side of each battery and the exhaust duct for discharging the air in the battery box. Each opening of the duct is arranged on the same side, and the cross-sectional area of the exhaust duct is set larger than the cross-sectional area of the intake duct. And the pressure difference between the intake duct portions become substantially equal, and the flow of air flowing between the plurality of batteries becomes uniform. For this reason, the some battery in a battery box can be cooled uniformly. Furthermore, since the openings of the intake duct and the exhaust duct are arranged on the same side, the compactness of the apparatus can be realized.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

[A] First embodiment (FIG. 1)
FIG. 1 shows a battery cooling device for an electric vehicle which is a first embodiment of a battery cooling device according to the present invention, in which (A) is a longitudinal sectional view, and (B) is an IB- in FIG. It is sectional drawing which follows an IB line.

  The battery 1 for an electric vehicle supplies electric power to a drive motor of the electric vehicle, and a plurality of batteries 1 are housed in a battery box 11 of the battery cooling device 10. The plurality of batteries 1 are cooled by the battery cooling device 10 by air introduced as described later.

  Each battery 1 has a rectangular parallelepiped shape, and the top surface 2 and the top surface 3 are positioned on the exhaust duct 13 side and the intake duct 12 side, respectively, in the battery box 11, and the side surface 4 on the wide area side of the side surfaces is mutually connected. Oppositely, they are arranged in the battery box 11.

  The battery box 11 includes an intake duct 12 and an exhaust duct 13 at positions facing each other, and supports a plurality of batteries 1 arranged in a row at the center portion. In this state, the ventilation path 14 is formed between the side surfaces 4 on the wide area side facing each other of the plurality of batteries 1. The ventilation path 14 is also formed between the side surface 4 on the large area side of the battery 1 and both end surfaces 15 of the battery box 11.

  The connection port 16 of the intake duct 12 and the exhaust port 17 of the exhaust duct 13 are located on the opposite sides, and a blower duct 18 is connected to the connection port 16 of the intake duct 12. The connection port 16 is formed in the air introduction portion 24 that is a portion not corresponding to the battery 1 in the intake duct 12, and thus the air duct 18 is connected to the air introduction portion 24. The air duct 18 is connected to the connection port 16 of the air introduction part 24 at an angle substantially perpendicular to the longitudinal direction P of the intake duct 12, that is, at an angle near or perpendicular.

  The air introduced from the air intake port 19 of the blower duct 18 changes the flow direction at a substantially right angle at a bent portion 20 near the connection portion between the blower duct 18 and the intake duct 12, and the inside of the intake duct 12 is downstream. To flow. The intake duct 12 introduces the introduced air into the ventilation path 14 between the plurality of batteries 1 and the ventilation path 14 between the battery 1 and the end face 15 of the battery box 11 to cool these batteries 1. The air whose temperature has increased by cooling the battery 1 reaches the exhaust duct 13, and this exhaust duct 13 discharges the air whose temperature has increased from the exhaust port 17.

  Since the air duct 18 is connected substantially perpendicularly to the longitudinal direction P of the intake duct 12, the stagnation region X1 generated in the intake duct 12 is along the air flow direction A in the air introduction portion 24 of the intake duct 12. The dimension L1 decreases. The reason is that the air introduced from the air intake port 19 of the blower duct 18 collides with the outer wall surface 21 of the air introduction part 24 in the bent part 20 and immediately reverses the flow direction (changes approximately 180 degrees). Furthermore, by changing the flow direction by approximately 90 degrees, it flows to the downstream side of the intake duct 12 without increasing the pressure.

  As shown in FIG. 1A, the stagnation region X1 is formed from the inner portion 22 of the air introduction portion 24 in the bent portion 20 along the air flow direction A along the wall surface of the air introduction portion 24. The In this case, the dimension 1 along the air flow direction A in the stagnation region X1 is shorter than the dimension L0 along the air flow direction B in the stagnation region W1 of the prior art shown in FIG. 11 (L1 < L0).

  Therefore, the length M1 along the longitudinal direction P of the intake duct 12 in the air introduction portion 24 is based on the sum of the length M0 of the air introduction portion 108 in the intake duct 103 and the length N of the blower duct 104 in the prior art. Is also set to a very short length. This is because if the stagnation region X1 along the air flow direction A does not reach the region corresponding to the battery 1 of the intake duct 12, the cooling efficiency of the battery 1 in the battery box 11 will not be insufficient, and the plurality of batteries This is because the cooling uniformity of 1 is ensured, and therefore the length M1 of the air introduction part 24 in the intake duct 12 can be shortened.

  In the intake duct 12, as shown in FIG. 1B, a stagnation region X2 is also generated in a region 23 corresponding to the battery 1 where the flow path cross-sectional area rapidly increases.

  Therefore, according to the present embodiment, the battery box 11 that houses the battery 1 is provided with the intake duct 12 that guides air to the side surface 4 on the wide area side of the battery 1 and introduces air into the intake duct 12. The blowing duct 18 is provided substantially perpendicularly to the longitudinal direction P of the intake duct 12. For this reason, the air introduced from the air duct 18 to the air introduction part 24 of the intake duct 12 is directed to the outer wall surface 21 in the bent part 20 near the connection part between the air duct 18 and the air introduction part 24 of the intake duct 12. They collide, reverse the flow direction, and flow in the intake duct 12 downstream. For this reason, the stagnation region X <b> 1 generated by the pressure increase in the air introduction part 24 of the intake duct 12 decreases in the air flow direction A in the air introduction part 24. As a result, it is possible to suppress the non-uniform cooling between the plurality of batteries 1 due to the influence of the stagnation, and to ensure the cooling uniformity of the plurality of batteries 1.

  Furthermore, since the length M1 along the longitudinal direction P of the intake duct 12 in the air introduction part 24 of the intake duct 12 can be shortened, the compactness of the battery cooling device 10 can be realized.

[B] Second embodiment (FIG. 2)
2A and 2B show a battery cooling device for an electric vehicle which is a second embodiment of the battery cooling device according to the present invention, in which FIG. 2A is a longitudinal sectional view, and FIG. Sectional drawing which follows the IIB line, (C) is IIC arrow line view of FIG. 2 (B). In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description will be simplified or omitted.

  The battery cooling device 25 of the present embodiment is different from the battery cooling device 10 of the first embodiment in that a fan device 26 is installed in the air introduction part 24 of the intake duct 12 instead of the air duct 18. Is a point.

  The fan device 26 is configured by disposing a fan 28 (for example, a centrifugal fan) in a fan casing 27. The fan casing 27 is installed substantially perpendicular to the longitudinal direction P of the intake duct 12 by connecting the connection port 29 to the connection port 16 of the air introduction part 24 in the intake duct 12. The fan casing 27 is provided with an air inlet 30.

  As the fan 28 rotates in the direction of arrow O, outside air (air) is sucked into the air from the air inlet 30 of the fan casing 27. The air moves outward in the radial direction of the fan 28, then moves along the wall surface of the fan casing 27, and passes through the connection port 16 of the air introduction portion 24 in the intake duct 12, and then the longitudinal direction of the intake duct 12. The air is forcibly blown into the air introduction portion 24 of the intake duct 12 in a direction substantially perpendicular to P. The air pressure-fed into the air introduction part 24 collides with the outer wall surface 21 of the air introduction part 24 at the bent part 20 in the vicinity of the connection part between the fan casing 27 and the air introduction part 24, and the flow direction is approximately 90 degrees. The air flows from the air introduction part 24 to the area corresponding to the battery 1 on the downstream side of the intake duct 12.

  Therefore, also in the present embodiment, the dimension L1 along the air flow direction A of the stagnation region X1 generated in the air introduction portion 24 of the intake duct 12 is the dimension L0 in the stagnation region W1 (see FIG. 11) of the prior art. As compared with the above-described embodiment, the cooling uniformity of the plurality of batteries 1 and the compactness of the battery cooling device 25 can be improved.

[C] Third embodiment (FIG. 3)
3A and 3B show a battery cooling device for an electric vehicle which is a third embodiment of the battery cooling device according to the present invention. FIG. 3A is a longitudinal sectional view, and FIG. It is sectional drawing which follows the IIIB line. In the third embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description will be simplified or omitted.

  The battery cooling device 35 of the present embodiment is different from the battery cooling device 10 of the first embodiment in the intake duct 36 that guides air to the ventilation path 14 between the plurality of batteries 1 in the battery box 11. The air introduction part 37 connected to the blower duct 18 is configured in a wide tube shape that gradually expands the cross-sectional area of the flow path along the air flow direction A.

  The air introduced from the blower duct 18 collides with the outer wall surface 21 of the air introduction part 37 at the bent part 20 near the connection part between the blower duct 18 and the air introduction part 37 of the intake duct 36, and then changes the flow direction. Then, the air flows smoothly through the air introduction portion 37 and is introduced into the portion corresponding to the battery 1 on the downstream side of the intake duct 36.

  Therefore, according to the embodiment, the air that has been introduced from the air duct 18 and whose flow direction has been changed in the bent portion 20 has an expanded pipe-shaped air introduction portion 37 that gradually expands the cross-sectional area in the air flow direction A. Therefore, the stagnation region X1 generated along the wall surface of the air introduction part 37 of the intake duct 36 from the inner part 22 in the bent part 20 has a dimension L2 along the air flow direction A in the air introduction part 37. It becomes shorter than the same dimension L1 of 1st Embodiment. For this reason, the length M2 along the longitudinal direction P of the intake duct 36 in the air introduction part 37 can be made shorter than the length M1 of the air introduction part 24 of the first embodiment. In addition, since the air introduction part 37 of the intake duct 36 is spread and formed in a tube shape, it is possible to prevent the stagnation region X2 (see FIG. 1B) from occurring in the part corresponding to the battery 1 in the intake duct 36.

  As a result, the cooling uniformity of the plurality of batteries 1 and the compactness of the battery cooling device 35 can be improved as compared with the battery cooling device 10 of the first embodiment.

[D] Fourth embodiment (FIG. 4)
4A and 4B show a battery cooling device for an electric vehicle which is a fourth embodiment of the battery cooling device according to the present invention. FIG. 4A is a longitudinal sectional view, and FIG. 4B is an IVB- in FIG. Sectional drawing which follows the IVB line, (C) is an IVC arrow line view of FIG. 4 (B). In the fourth embodiment, the same parts as those in the first to third embodiments are denoted by the same reference numerals, and the description is simplified or omitted.

  The battery cooling device 40 of the present embodiment is configured by combining the battery cooling device 25 of the second embodiment and the battery cooling device 35 of the third embodiment. That is, in the battery cooling device 40, the fan device 26 is installed in the air introduction portion 37 of the intake duct 36, and the air introduction portion 37 of the intake duct 36 is substantially perpendicular to the longitudinal direction P of the intake duct 36 from the fan device 26. The air is forcibly blown.

  Therefore, according to the present embodiment, similarly to the third embodiment, the cooling uniformity of the plurality of batteries 1 and the compactness of the battery cooling device 40 are the same as those of the first and second embodiments. It can be improved more than the case.

[E] Fifth embodiment (FIG. 5)
FIG. 5 shows a battery cooling device for an electric vehicle which is a fifth embodiment of the battery cooling device according to the present invention, in which (A) is a longitudinal sectional view and (B) is a VB- in FIG. It is sectional drawing which follows the VB line. In the fifth embodiment, the same parts as those in the first and third embodiments are denoted by the same reference numerals, and the description will be simplified or omitted.

  The battery cooling device 50 of the fifth embodiment is different from the battery cooling device 35 of the third embodiment in that a bent portion in the vicinity where the air introduction portion 52 of the intake duct 51 is connected to the air duct 18. The inside portion 53 of 20 is a point formed in a step shape. The staircase shape of the air introduction part 52 is formed around the inner part 53 where the air introduction part 52 is connected to the air duct 18.

  That is, the intake duct 51 guides air to the ventilation path 14 between the plurality of batteries 1 in the battery box 11 in an area corresponding to the battery 1. The connection port 16 of the air introduction part 52 of the intake duct 51 is connected to the blower duct 18, and the bent part 20 is formed in the vicinity of this connection part. By forming the step-shaped inner portion 53 inside the bent portion 20, the air from the blower duct 18 to the air introduction portion 52 and the flow direction is changed to a substantially right angle flows in the step-shaped inner portion 53. The flow direction is changed in stages.

  Therefore, according to the present embodiment, in the air introduction portion 52 of the intake duct 51, the stagnation region X1 formed along the wall surface of the air introduction portion 52 from the inner portion 53 of the bent portion 20 is within the air introduction portion 52. The dimension L3 along the flow direction A of the air flowing through is shorter than the dimension L2 of the stagnation region X1 in the case of the third embodiment. For this reason, the length M3 along the longitudinal direction P of the intake duct 51 in the air introduction portion 52 can be made shorter than the length M2 of the air introduction portion 37 in the third embodiment. As a result, the cooling uniformity of the plurality of batteries 1 and the compactness of the battery cooling device 50 can be improved as compared with the battery cooling device 35 of the third embodiment.

[F] Sixth embodiment (FIG. 6)
FIG. 6 shows a battery cooling device for an electric vehicle that is a sixth embodiment of the battery cooling device according to the present invention, in which (A) is a longitudinal sectional view, and (B) is a VIB- in FIG. Sectional drawing which follows a VIB line, (C) is a VIC arrow line view of FIG. 6 (B). In the sixth embodiment, the same parts as those in the first to fourth embodiments are denoted by the same reference numerals, and the description will be simplified or omitted.

  The battery cooling device 60 of the present embodiment is different from the battery cooling device 40 of the fourth embodiment in that the inside of the bent portion 20 in the vicinity where the air introduction portion 62 of the intake duct 61 is connected to the air duct 18. The portion 63 is a point formed in a taper shape. The taper shape of the air introduction portion 62 is formed around the inner portion 63 where the air introduction portion 62 is connected to the fan device 26.

  That is, the air intake duct 61 guides air to the ventilation path 14 between the plurality of batteries 1 in the battery box 11 in an area corresponding to the battery 1. The connection port 16 of the air introduction part 62 of the intake duct 61 is connected to the fan casing 27 of the fan device 26, and the bent part 20 is formed in the vicinity of this connection part. The taper-shaped inner portion 63 is formed inside the bent portion 20, so that the air from the fan device 26 to the air introduction portion 62 and whose flow direction is changed to a substantially right angle is a taper-shaped portion. In the inner portion 63, the flow direction is changed smoothly and continuously.

  Therefore, according to the present embodiment, in the air introduction portion 62 of the intake duct 61, the stagnation region X1 formed along the wall surface of the air introduction portion 62 from the inner portion 63 of the bent portion 20 is within the air introduction portion 62. The dimension L4 along the flow direction A of the air flowing through is shorter than the dimension L2 of the stagnation region X1 in the case of the fourth embodiment. For this reason, the length M4 along the longitudinal direction P of the intake duct 61 in the air introduction part 62 can be shorter than the length M2 of the air introduction part 37 in the fourth embodiment. As a result, the cooling uniformity of the plurality of batteries 1 and the compactness of the battery cooling device 60 can be improved as compared with the battery cooling device 40 of the fourth embodiment.

[G] Seventh embodiment (FIGS. 7 to 9)
7A and 7B show a battery cooling device for an electric vehicle that is a seventh embodiment of the battery cooling device according to the present invention, in which FIG. 7A is a longitudinal sectional view, and FIG. 7B is a VIIB- in FIG. Sectional drawing which follows the VIIB line, (C) is sectional drawing which follows the VIIC-VIIC line | wire of FIG. 7 (B). In the seventh embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description will be simplified or omitted.

  The battery cooling device 70 of the present embodiment is different from the battery cooling device 10 of the first embodiment in that the air duct 18 is not connected to the intake duct 12 and the direction and structure of the exhaust duct 71. It is a changed point.

  That is, the air duct 18 is not connected to the air introduction portion 24 of the intake duct 12, and the opening portion of the air introduction portion 24 is formed orthogonal to the longitudinal direction P of the intake duct 12 to introduce air. 72 functions. Further, the exhaust duct 71 has an exhaust port 73 disposed on the same side as the intake port 72 of the intake duct 12, and the battery cooling device 70 is configured in a counter-flow side (U-shaped) flow path structure.

  Furthermore, at the same position in the longitudinal direction Z of the battery cooling device 70, the flow passage cross-sectional area of the exhaust duct 71 is set larger than the flow passage cross-sectional area of the intake duct 12. For example, the height H1 of the exhaust duct 71 is higher than the height H2 of the intake duct 12, and is set to, for example, approximately 1.4 times the height H2.

  Thus, by setting the height H1 of the exhaust duct 71 higher than the height H2 of the intake duct 12, the flow velocity of the air flowing through the exhaust duct 71 is increased. Accordingly, the air introduced from the air inlet 72 into the air intake duct 12 flows through the ventilation path 14 between the plurality of batteries 1 in the battery box 11 and reaches the exhaust duct 71. At this time, the air flows in the exhaust duct 71. In the longitudinal direction Z of the battery cooling device 70 drawn by the high-speed air, in the entire range of the ventilation path 14 from the near side close to the intake port 72 and the exhaust port 73 to the far side, the flow at a substantially uniform speed Become. For this reason, the plurality of batteries 1 arranged in a line from the near side to the far side in the battery box 11 are cooled to a uniform temperature.

  The speed (flow velocity) characteristics and cooling characteristics described above will be described using FIGS. 8 and 9 in comparison with the conventional battery cooling device 100 (FIG. 11).

  In the conventional battery cooling device 100 shown in FIG. 11, the height H3 of the exhaust duct 105 is set to be substantially the same as the height H4 of the intake duct 103 and the air duct 104. For this reason, as shown by the solid line β in FIG. 8, the air flowing from the intake duct 103 to each ventilation path 110 between the batteries 102 is ventilated on the far side on the exhaust port 111 side in the longitudinal direction Y of the battery cooling device 100. Although the flow speed is fast in the path 110, the flow speed is slow in the ventilation path 110 located on the near side of the intake port 107 side. Therefore, as shown by a solid line δ in FIG. 9, the battery 102 located on the front side of the battery cooling device 100 is insufficiently cooled and the temperature rises, and the plurality of batteries 102 in the battery cooling device 100 are uniformly distributed. It cannot be cooled.

  On the other hand, in the battery cooling device 70 of the present embodiment, the height H1 of the exhaust duct 71 is set to be, for example, 1.4 times the height H2 of the intake duct 12, and therefore flows through the exhaust duct 71. The air flow is fast, and the air flowing from the intake duct 12 to each ventilation path 14 between the batteries 1 is located in the range from the front side to the back side of the battery cooling device 70, as indicated by the solid line α in FIG. In the ventilation path 14, it becomes substantially equal. For this reason, as shown by the solid line γ in FIG. 9, the batteries 1 installed in the range from the front side to the back side of the battery cooling device 70 are uniformly cooled and become substantially the same temperature.

  Note that the battery cooling device 70 according to the present embodiment has a high flow velocity of the air flowing in front of the exhaust duct 71, and the air guided from the intake duct 12 to the ventilation path 14 between the plurality of batteries 1 and the like in the exhaust duct 71. Therefore, it is possible to suppress the occurrence of stagnation in the area corresponding to the air introduction part 24 and the battery 1 in the intake duct 12.

  Therefore, according to the embodiment, the battery box 11 is provided with the intake duct 12 that guides air to the side surface 4 on the wide area side of each battery 1 and the exhaust duct 71 that discharges the air in the battery box 11. The intake port 72 of the intake duct 12 and the exhaust port 73 of the exhaust duct 71 are installed on the same side, and the height H1 of the exhaust duct 71 is 1.4, for example, higher than the height H2 of the intake duct 12. It is set twice as high. Accordingly, the flow velocity of the air flowing through the exhaust duct 71 is increased, and the flow of air flowing through the ventilation path 14 between the plurality of batteries 1 becomes uniform, so that the plurality of batteries 1 in the battery box 11 are uniformly cooled. can do.

  Furthermore, since the intake port 72 of the intake duct 12 and the exhaust port 73 of the exhaust duct 71 are arranged on the same side, the compactness of the battery cooling device 70 can be realized.

[H] Eighth embodiment (FIG. 10)
10A and 10B show a battery cooling device for an electric vehicle that is an eighth embodiment of the battery cooling device according to the present invention. FIG. 10A is a longitudinal sectional view, and FIG. Sectional drawing in alignment with a line, (C) is a XC arrow directional view of FIG.10 (B). In the eighth embodiment, the same parts as those in the first to fourth and seventh embodiments are denoted by the same reference numerals, and the description will be simplified or omitted.

  The battery cooling device 80 according to the present embodiment is a combination of the battery cooling device 40 according to the fourth embodiment and the battery cooling device 70 according to the seventh embodiment.

  That is, in the battery cooling device 80, the exhaust port 82 of the exhaust duct 81 is disposed on the same side as the connection port 16 of the intake duct 36 in the battery cooling device 40, and the height H1 of the exhaust duct 81 is set to the height of the intake duct 36. It is set to be higher than H2, for example, approximately 1.4 times the height H2, and at the same position in the longitudinal direction Z of the battery cooling device 80, the flow passage cross-sectional area of the exhaust duct 81 is changed to the flow of the intake duct 36. It is set larger than the road cross-sectional area. In the battery cooling device 80, the width U near the exhaust port 82 is formed to be substantially the same as the width V of the battery box 11.

  Therefore, according to the present embodiment, the height H1 of the exhaust duct 81 is set higher than the height H2 of the intake duct 36, for example, approximately 1.4 times the height H2. The same effects as those of the seventh embodiment can be obtained, for example, the plurality of batteries 1 housed in the battery box 11 of the device 80 can be uniformly cooled.

  Further, the fan device 26 is installed in the air introduction portion 37 of the intake duct 36, and air is blown from the fan device 26 to the air introduction portion 37 of the intake duct 36 substantially perpendicularly to the longitudinal direction P of the intake duct 36, and the air The introduction portion 37 is formed in a wide tube shape in which the cross-sectional area of the flow path gradually increases along the air flow direction A. For this reason, even when stagnation occurs in the air introduction portion 37, the dimension of the stagnation region in the air flow direction A can be shortened. As a result, non-uniform cooling of the plurality of batteries 1 due to the influence of stagnation can be suppressed, and these batteries 1 can be cooled uniformly, and the dimension along the longitudinal direction P of the intake duct 36 in the air introduction portion 37 can be shortened. Thus, the battery cooling device 80 can be made compact, and effects similar to those of the fourth embodiment can be obtained.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this.

  For example, the combination of the seventh embodiment and the fourth embodiment is described as the eighth embodiment, but the battery cooling device 70 of the seventh embodiment and the first embodiment are described. The battery cooling device 10 according to the seventh embodiment may be combined with the battery cooling device 70 according to the seventh embodiment and the battery cooling device 50 or 60 according to the fifth or sixth embodiment.

  Furthermore, in each of the above-described embodiments, the battery 1 is described as being used for an electric vehicle. However, the battery 1 is used for household or business electric equipment such as a microwave oven or a vacuum cleaner, or for work used outdoors, for example. What is used for a machine etc. may be used.

The battery cooling device for electric vehicles which is 1st Embodiment of the battery cooling device which concerns on this invention is shown, (A) is a longitudinal cross-sectional view, (B) follows the IB-IB line of FIG. 1 (A). Sectional drawing. The battery cooling device for electric vehicles which is 2nd Embodiment of the battery cooling device which concerns on this invention is shown, (A) is a longitudinal cross-sectional view, (B) follows the IIB-IIB line | wire of FIG. 2 (A). Sectional drawing and (C) are IIC arrow directional views of FIG. 2 (B). The battery cooling device for electric vehicles which is 3rd Embodiment of the battery cooling device which concerns on this invention is shown, (A) is a longitudinal cross-sectional view, (B) follows the IIIB-IIIB line | wire of FIG. 3 (A). Sectional drawing. The battery cooling device for electric vehicles which is 4th Embodiment of the battery cooling device which concerns on this invention is shown, (A) is a longitudinal cross-sectional view, (B) follows the IVB-IVB line | wire of FIG. 4 (A). Sectional drawing and (C) are IVC arrow directional views of FIG. 4 (B). The battery cooling device for electric vehicles which is 5th Embodiment of the battery cooling device which concerns on this invention is shown, (A) is a longitudinal cross-sectional view, (B) follows the VB-VB line | wire of FIG. 5 (A). Sectional drawing. The battery cooling device for electric vehicles which is 6th Embodiment of the battery cooling device which concerns on this invention is shown, (A) is a longitudinal cross-sectional view, (B) follows the VIB-VIB line | wire of FIG. 6 (A). Sectional drawing, (C) is a VIC arrow view of FIG. 6 (B). The battery cooling device for electric vehicles which is the 7th Embodiment of the battery cooling device which concerns on this invention is shown, (A) is a longitudinal cross-sectional view, (B) follows the VIIB-VIIB line | wire of FIG. 7 (A). Sectional drawing, (C) is sectional drawing which follows the VIIC-VIIC line | wire of FIG. 7 (B). The graph which shows the flow-velocity distribution in the battery box in the battery cooling device of FIG. 7 compared with a prior art. The graph which shows the temperature distribution of each battery in the battery box in the battery cooling device of FIG. 7 compared with a prior art. The battery cooling device for electric vehicles which is 8th Embodiment of the battery cooling device which concerns on this invention is shown, (A) is a longitudinal cross-sectional view, (B) follows the XB-XB line | wire of FIG. 10 (A). Sectional drawing and (C) are XC arrow directional views of FIG. 10 (B). The conventional battery cooling device for electric vehicles is shown, (A) is a longitudinal cross-sectional view, (B) is sectional drawing which follows the XIB-XIB line | wire of FIG. 11 (A).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Battery 10 Battery cooling device 11 Battery box 12 Intake duct 16 Connection port 18 Air blow duct 20 Bending part 25 Battery cooling device 26 Fan device 28 Fan 35 Battery cooling device 36 Intake duct 37 Air introduction part 40 Battery cooling device 50 Battery cooling device 51 Intake duct 53 Inner portion 60 Battery cooling device 61 Intake duct 63 Inner portion 70 Battery cooling device 71 Exhaust duct 72 Intake port 73 Exhaust port 80 Battery cooling device 81 Exhaust port 82 Exhaust ports H1, H2 Height P Longitudinal directions X1, X2 region

Claims (10)

In the battery cooling device that cools the battery by guiding air into a battery box that houses a plurality of batteries,
The battery box is provided with an air intake duct that guides air to a wide area side surface of each battery, and an air duct that introduces air into the air intake duct is a portion that does not correspond to the battery in the air intake duct. The air introduction part is provided substantially perpendicular to the longitudinal direction of the intake duct ,
The battery cooling device according to claim 1 , wherein the air introduction part is configured such that a length along a longitudinal direction of the intake duct is longer than a stagnation region generated in the air introduction part . 2. The battery cooling device according to claim 1, wherein a fan device that forcibly blows air to the intake duct in a direction substantially perpendicular to the longitudinal direction of the intake duct is installed instead of the air duct. The air introduction part of the air intake duct connected to the blower duct or the fan device is configured to have an expanded tube shape in which the flow path cross-sectional area gradually increases along the air flow direction. The battery cooling device described in 1. The battery according to any one of claims 1 to 3, wherein an inner portion of a bent portion in the vicinity where the intake duct is connected to a blower duct or a fan device is formed in a step shape or a taper shape. Cooling system. 5. The battery cooling according to claim 1, wherein a length along a longitudinal direction of the air intake duct in the air introduction portion is configured to be shorter than a length of the air duct or the fan device in the longitudinal direction. apparatus. In the battery cooling device that cools the battery by guiding air into a battery box that houses a plurality of batteries,
The battery box is provided with an intake duct that guides air to the side of the large area of each battery and an exhaust duct that discharges the air inside the battery box,
The openings of the intake duct and the exhaust duct are arranged on the same side, and the height of the exhaust duct is set to 1.4 times the height of the intake duct, so that the flow path of the exhaust duct is cut off. The area is set larger than the flow passage cross-sectional area of the intake duct,
A blower duct that introduces air into the intake duct is provided substantially perpendicular to the longitudinal direction of the intake duct in an air introduction portion that is a portion not corresponding to the battery in the intake duct.
The battery cooling device according to claim 1, wherein the air introduction part is configured such that a length along a longitudinal direction of the intake duct is longer than a stagnation region generated in the air introduction part . The battery cooling device according to claim 6 , wherein a fan device that forcibly blows air to the intake duct in a direction substantially perpendicular to a longitudinal direction of the intake duct is installed instead of the blower duct. Air inlet portion of the intake duct connected to the air duct or fan apparatus in claim 6 or 7, characterized in that the flow path area in the flow direction of the air is configured to spread tube shape gradually expanding The battery cooling device described. The inner portion of the bent portion in the vicinity of the intake duct is connected to a blower duct or fan device, stepped shape or tape - battery according to any one of claims 6 to 8, characterized in that formed on the path shape Cooling system. Battery, electric vehicle, a battery cooling device according to any of claims 1 to 9, characterized in that for use in electrical equipment or working machine.

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