JPWO2015190440A1 - Battery panel - Google Patents

Abstract

Provided is a storage battery panel capable of cooling each storage battery as evenly as possible regardless of whether it is positioned upstream or downstream of the air flow circulating in the storage battery panel by an induced air blower. The storage battery panel 1 includes an assembled battery 3a included in the upper assembled battery group Gu and an assembled battery 3b included in the lower assembled battery group Gl. The induction blower 7 provided on the top plate portion of the housing 5 discharges the air at the top of the housing 5 to the outside and takes in the outside air from the bottom plate portion of the housing 5. On the other hand, the air flow resistance adjusting member 13a reduces the air flow resistance so that the cooling efficiency is high while the assembled battery 3b is cooled by the lower temperature air. However, since the air flow resistance adjusted by the air flow resistance adjusting member 13b is larger, the cooling efficiency is lower. Thereby, irrespective of the position in the storage battery board 1, the temperature of each assembled battery 3a, 3b can be made close equally.

Description

  The present invention relates to a storage battery board including an assembled battery in which both ends of a plurality of cylindrical storage batteries that are electrically connected and arranged in parallel are held by a pair of cell holders.

  In order to obtain a desired voltage and capacity, a cylindrical storage battery constitutes an assembled battery by combining a plurality of storage batteries, and further, a combination of one or more assembled batteries is housed in a housing to constitute a storage battery panel. Is generally used. In particular, a storage battery panel using a lithium ion secondary battery is equipped with a cooling fan that takes external air into the housing of the storage battery panel and discharges the internal air to the outside as a countermeasure against heat generation of the lithium ion secondary battery. In addition, in order to further improve the cooling efficiency by adjusting the air flow, a diamond-shaped member having a cross-sectional shape acting as an air flow guide or air flow resistance is arranged in the space between the batteries [Patent No. 1] FIG. 17 (Patent Document 1) of Japanese Patent No. 3988324].

Japanese Patent No. 3988324

  Even if the storage battery panel is provided with a cooling fan, it is difficult to uniformly cool all the storage batteries in the storage battery panel. Most typically, when the air just taken from the outside is compared with the air just before the exhaust, the latter, which has already sucked the heat generated from the storage battery, has a higher temperature. Therefore, the storage battery located near the air discharge port is less likely to be cooled than the storage battery located near the air inlet. When a large temperature variation occurs in each storage battery included in the storage battery panel, some of the storage batteries are not sufficiently charged and discharged, and the performance of the storage battery panel may be impaired, and safety may be affected.

  An object of the present invention is to provide a storage battery panel that can reduce the variation in the temperature of the storage battery in each assembled battery regardless of whether it is located upstream or downstream of the air flow flowing in the storage battery panel. is there.

  The storage battery panel according to the present invention includes a plurality of assembled batteries, a housing that houses a plurality of assembled batteries therein, and an induction blower that is provided on the top plate portion of the housing and that draws air from inside the housing and discharges it to the outside. And. Each assembled battery includes a plurality of battery arrays formed of a plurality of cylindrical storage batteries, and further includes a battery group formed of a plurality of battery arrays, and this battery group is held between a pair of holders. The plurality of battery rows are configured by arranging a plurality of cylindrical storage batteries at a predetermined interval in a first direction orthogonal to the longitudinal direction of the storage batteries. The battery group is formed by arranging a plurality of battery rows at predetermined intervals in a longitudinal direction and a second direction orthogonal to the first direction. And a battery group is hold | maintained between a pair of holder arrange | positioned so as to oppose the both sides of a longitudinal direction, and each assembled battery is comprised.

  A plurality of assembled battery groups configured by arranging two or more assembled batteries in a horizontal direction in the casing so that air flows through all the assembled batteries when the induction blower is driven. Are arranged separately in the vertical direction. In the assembled battery, an air flow resistance adjusting member is disposed in a space surrounded by at least two adjacent cylindrical storage batteries in order to adjust the resistance of the air flow generated by the induction blower. Yes. In the present invention, in two battery pack groups adjacent in the vertical direction, the cooling efficiency in the battery packs included in the battery pack group located on the upper side is the plurality of battery packs included in the battery pack group located on the lower side. The shape of the air flow resistance adjusting member in the plurality of assembled batteries included in the plurality of assembled battery groups is determined so as to be better than the cooling efficiency in the battery.

  The cooling performance (or cooling efficiency) in the assembled battery is affected by the speed of the air flow and the air volume flowing along the outer surface of the storage battery. Therefore, the inventor has reduced the temperature variation of the plurality of storage batteries in the battery panel by adjusting the cooling performance (cooling efficiency) of the assembled battery by changing the cross-sectional shape of the air flow resistance adjusting member. Thought. When the cross-sectional area of the air flow resistance adjusting member decreases, the air flow resistance adjusting member approaches the state where there is no air flow resistance adjusting member, and when the cross-sectional area of the air flow resistance adjusting member increases, the flow path between the air flow resistance adjusting member and the adjacent storage battery Becomes narrower, and the speed of the air flow passing between them becomes faster, so that the cooling performance can be improved. However, if this flow path becomes too narrow, the amount of air passing through this flow path will decrease and cooling performance (cooling efficiency) will be reduced. Then, the inventor considered suppressing the variation in the temperature of the some storage battery in a battery panel using this airflow resistance adjustment member. When assembled batteries having the same cross-sectional shape dimensions as the air flow resistance adjusting member are arranged in the left-right and up-down directions, they are included in the assembled battery group located on the upper side and the assembled battery group located on the lower side When the temperature of the storage battery in the assembled battery is compared, the temperature of the air flow flowing in the assembled battery included in the assembled battery group located on the upper side is the air flowing in the assembled battery included in the assembled battery group located on the lower side. It was confirmed that the temperature was higher than the flow temperature. Therefore, in the present invention, the cooling efficiency of the plurality of assembled batteries included in the assembled battery group positioned on the upper side is improved so that the cooling efficiency of the plurality of assembled batteries included in the assembled battery group positioned on the lower side is improved. Since the shape of the air flow resistance adjusting member in the plurality of assembled batteries included in the assembled battery group is determined, the temperature of the air flow flowing in the plurality of assembled batteries included in the upper assembled battery group becomes high. However, the cooling efficiency of the storage battery in an assembled battery becomes high, and the temperature upper direction of a storage battery can be suppressed. As a result, the variation width of the temperature of the storage batteries in the plurality of battery packs included in the battery pack group located on the upper side and the temperature of the storage batteries in the battery packs included in the battery pack group located on the lower side are reduced. be able to.

  One group does not necessarily have to be at the same height. For example, if assembled batteries are arranged in four upper and lower stages, the upper two stages and the lower two stages are divided into two assembled battery groups. Also good. Alternatively, the assembled batteries of three or more stages in the upper and lower stages may be divided into three or more assembled battery groups each having one stage, and a difference in cooling performance may be generated between at least one assembled battery group. Further, the number of storage batteries constituting the battery train and the number of battery trains constituting the battery group are also arbitrary. Typically, a battery row is composed of three storage batteries, two battery rows are combined to form a battery group, and the assembled battery includes six storage batteries. In the case of such a configuration example, it is preferable that the air flow resistance adjusting member has two spaces surrounded by four adjacent storage batteries, and is arranged in each of these spaces. Moreover, you may arrange | position between 2 or more other adjacent storage batteries, and in that case, also including the storage battery which belongs to an adjacent assembled battery, it becomes the space enclosed by the some storage battery.

  According to the present invention, regardless of whether the air flowing in the storage battery panel is located upstream or downstream, the temperature difference between the temperatures of the storage batteries is kept as small as possible. Therefore, since many storage batteries are charged / discharged in the same airway environment, the performance of the storage battery panel can be fully exhibited, and the occurrence of problems due to overheating of the storage battery can be prevented.

  The air flow resistance adjusting member extends in the longitudinal direction, and the outline of the cross-sectional shape in the direction orthogonal to the longitudinal direction of the air flow resistance adjusting member is the first and second sides approaching upward, and the downward direction. You may have at least the 3rd and 4th edge | side which approaches toward. In other words, the outline of the profile of the cross-sectional shape of the air flow resistance adjusting member is such that at least the corner between the first and second sides (or on an imaginary extension line thereof) is located at the top, And a square whose posture is adjusted so that the corner between the fourth side and the fourth side (or on an imaginary extension line thereof) is located at the lowermost part. Preferably, the outline of the outline of the cross-sectional shape of the air flow resistance adjusting member is a square or a rhombus. It is confirmed that when the cross-sectional shape of the air flow resistance adjusting member is formed in such an outline, the air flow resistance in the storage battery panel is reduced and the cooling efficiency can be improved as compared with other shapes. ing.

  Further, the air flow resistance adjusting member further includes a fifth side extending in the vertical direction between the first side and the third side in the outline of the cross-sectional shape, and the second side and the second side A sixth side extending in the vertical direction may be further formed between the four sides. That is, the outline of the profile of the cross-sectional shape of the air flow resistance adjusting member is that the fifth side and the sixth side extending in the vertical direction are formed at the corners (or the vicinity thereof) positioned at the left and right ends, respectively. It becomes a square with a chamfered corner or a hexagon. When the air flow resistance adjusting member having such a cross-sectional shape is used, adjustment for improving the cooling efficiency is facilitated.

  In addition to this, the corner (or the vicinity thereof) located between the first side and the second side, between the third side and the fourth side, that is, at the upper and lower ends of the air flow resistance adjusting member. ) May be formed with a seventh side and an eighth side respectively extending in the left-right direction, in which case the outline of the outline of the air flow resistance adjusting member is a square with four corners chamfered, or It becomes an octagon. With this structure, adjustment for further improving the cooling efficiency is facilitated.

It is a figure which shows embodiment of the storage battery panel of this invention, (A) is a front view, (B) is each storage battery of the assembled battery which belongs to the upper assembled battery group of (A), an airflow resistance adjustment member, and one side The enlarged front view which shows only a holder, (C) is a figure similar to (B) of the assembled battery which belongs to the lower assembled battery group of (A). (A) is a side view which shows the assembled battery shown to FIG. 1 (B), (B) is a top view of the same assembled battery. (A) is the perspective view which shows each storage battery with a broken line the assembled battery of FIG. 1 (B), (B) is a perspective view similar to (A) of the assembled battery of FIG. 1 (C). It is a figure which expands and shows the outline of the cross-sectional shape of the longitudinal direction of the airflow resistance adjustment member of FIG.1 (C). It is a figure which shows the different cross-sectional shape of an airflow resistance adjustment member. (A) And (B) is a figure which shows the positional relationship of the measurement position which arrange | positions the temperature sensor used for the test, and measures temperature, and an airflow resistance adjustment member. (A) is a figure which shows the battery temperature of the center position in an assembled battery, (B) is a figure which shows the dispersion | variation in the measurement temperature in each measurement position.

  Hereinafter, an example of an embodiment of a storage battery board according to the present invention will be described with reference to the drawings. As shown in FIG. 1A, the storage battery panel 1 of the present embodiment houses a total of 16 assembled batteries 3a and 3b arranged in a 4 × 4 matrix, and the assembled batteries 3a and 3b therein. A housing 5 and an induction blower 7 that draws cooling air into the housing 5 are provided.

  The induction blower 7 is provided on the top plate portion 5A of the housing 5 and attracts air from the upper portion of the housing 5 to discharge it to the outside, whereby an air inlet (not shown) (the bottom plate portion of the housing 5) is drawn. 5B or the bottom plate 5B of the side wall 5C of the housing 5 is provided near the bottom plate 5B.) External air is taken into the housing 5. The door member constituting the side wall portion on the front side of the housing 5 is not shown. An installation shelf on which the assembled battery is placed is also not shown. The external air taken in from the bottom plate portion 5B of the housing 5 absorbs heat from the surface of each assembled battery 3a, 3b while passing through the space between each assembled battery 3a, 3b, and the induced air blower 7 It is discharged to the outside of the housing 5 through. Therefore, the temperature of the discharged air is higher than that of the air just taken into the housing 5.

  As shown in FIGS. 1B and 1C and FIGS. 2 and 3, each of the assembled batteries 3 a and 3 b includes six cylindrical storage batteries 9. In FIG. 3, the storage battery 9 is indicated by a broken line. Hereinafter, a cylindrical storage battery is simply referred to as a storage battery. One battery row is constituted by three storage batteries 9 arranged in the horizontal direction. And the battery group containing the six storage batteries 9 is comprised by arrange | positioning two battery rows apart in the up-down direction. The battery group is held between a pair of insulating resin holders 11 and 11, and each of the assembled batteries 3a and 3b is configured. In the present embodiment, the pair of holders 11 and 11 are schematically shown only to indicate their presence. The bus bar, the measurement wiring, and the control circuit that electrically connect the storage batteries 9 are not shown. Each storage battery 9 of the assembled batteries 3a and 3b is held between holders 11 and 11. A reinforcing bar is also bridged between the holders 11 and 11, but the illustration is omitted. The part located between the holders 11 and 11 of each storage battery 9 is in an exposed state for air cooling.

  In the two battery rows 10A and 10B, three storage batteries 9 are arranged at predetermined intervals in the horizontal direction when viewed in FIG. 1, which is the first direction orthogonal to the longitudinal direction of the storage batteries 9. Configured. In the battery group 8, two battery rows 10A and 10B are arranged at a predetermined interval in the vertical direction when viewed in FIG. 1, which is the second direction orthogonal to the longitudinal direction and the first direction. Composed. The battery group 8 is held between a pair of holders 11 (only one in the back is shown in FIG. 1) disposed on both sides in the longitudinal direction so as to face each other.

  The upper assembled battery group Gu and the lower assembled battery group G1, which are two assembled battery groups configured by horizontally arranging the assembled batteries 3a and 3b in the housing 5, are driven by the induction blower 7 In the case 5, the battery packs 3a and 3b are arranged separately in the vertical direction so that air flows through all the assembled batteries 3a and 3b. In the assembled batteries 3a and 3b, in order to adjust the resistance of the air flow generated by the induction blower 7, the upper assembled battery group Gu is placed in each of two spaces surrounded by four adjacent storage batteries 9. Two air flow resistance adjusting members 13a are arranged in each of the assembled batteries 3a to which the battery pack 3a belongs, and two air flow resistance adjusting members 13b are arranged in each of the assembled batteries 3b belonging to the lower assembled battery group Gl. The air flow resistance adjusting member 13a and the air flow resistance adjusting member 13b have a structure formed in a cylindrical shape by an insulating resin material, and both ends are fixed to the holders 11 and 11, respectively.

  In two battery groups adjacent in the vertical direction, the air flow resistance in each battery pack 3a included in the upper battery group Gu is higher than the air flow resistance in each battery pack 3b included in the lower battery group Gl. The shape of the air flow resistance adjusting members 13a and 13b in each of the assembled batteries 3a and 3b is determined so as to be smaller. In addition, a signal line is passed through the air flow resistance adjusting members 13a and 13b, and a voltage detected for each storage battery 9 by a control circuit (not shown) mounted on one side of the holder 11 is detected. The signal etc. which show are transmitted.

  The air flow resistance adjusting member 13b extends in the assembled battery 3b in the longitudinal direction of the storage battery 9, and both ends thereof are fixed to inner walls facing each other of the pair of holders 11 and 11, respectively. As shown in FIG. 4, the outline of the cross-sectional shape in the direction orthogonal to the longitudinal direction of the air flow resistance adjusting member 13b is a first side 15 and a second side 17 that approach in the upward direction as viewed in FIG. And a third side 19 and a fourth side 21 approaching downward. In addition, a fifth side 23 extending in the vertical direction between the first side 15 and the third side 19 has a sixth side extending in the vertical direction between the second side 17 and the fourth side 21. A side 25 has a seventh side 27 extending in the left-right direction between the first side 15 and the second side 17, and a seventh side 27 extending in the horizontal direction between the third side 19 and the fourth side 21. Eight sides 29 are respectively formed. The lengths of the first side 15 to the fourth side 21 are the same, and the lengths of the fifth side 23 to the eighth side 29 are also the same, but shorter than the first side 15 to the fourth side 21. . Four sets of opposing sides (first side 15 and fourth side 21, second side 17 and third side 19, fifth side 23 and sixth side 25, seventh side 27 and second side The eight sides 29) are parallel to each other and the angle of each corner is 135 °.

  That is, the outline of the outline of the cross-sectional shape of the air flow resistance adjusting member 13b is such that the seventh side 27 between the first side 15 and the second side 17 is located at the top, and the third side 19 and The eighth side 29 between the fourth side 21 and the fourth side 21 is located at the bottom, the fifth side 23 between the first side 15 and the third side 19 is located at the leftmost side, and the second side An octagon arranged so that the sixth side 25 between the side 17 and the fourth side 21 is located on the rightmost side, or a square with four corners chamfered. A space surrounded by four storage batteries 9 as shown in FIGS. 1A and 1B in the air flow resistance adjusting member 13b having the outline of the cross-sectional outline as shown in FIG. If it arrange | positions, compared with the case where the air flow resistance adjustment member of another shape is arrange | positioned, the air flow resistance in assembled battery 3a, 3b (hence, in the storage battery panel 1) will reduce, and cooling efficiency will improve. . The outline of the outline of the cross-sectional shape of the air flow resistance adjusting member 13a is similar to the reduced size of the air flow resistance adjusting member 13b, and thus description thereof is omitted.

  The two types of assembled batteries 3a and 3b have the same configuration except for the shape of the air flow resistance adjusting members 13a and 13b. With the assembled battery having the same configuration provided with the air flow resistance adjusting member, the cooling efficiency improves as the speed at which the cooling air passes through the assembled battery increases. When the assembled battery 3a and the assembled battery 3b are compared, the velocity of the air flow flowing in the assembled battery is different due to the difference in the cross-sectional contours of the air flow resistance adjusting member 13a and the air flow resistance adjusting member 13b provided in each of them. The assembled battery 3a is faster than the assembled battery 3b.

  The induction blower 7 provided on the top plate portion 5A of the housing 5 of the storage battery panel 1 exhausts the air in the housing 5 from the upper portion of the housing 5 and removes the external air from the bottom plate portion of the housing 5. When taken in, the assembled battery 3a included in the upper assembled battery group Gu is heated by the assembled battery 3b included in the lower assembled battery group Gl and supplied with higher temperature air, but each of the assembled batteries 3a Since cooling efficiency is high, the temperature rise of a storage battery can be suppressed. Conversely, the assembled battery 3b included in the lower assembled battery group Gl is cooled by air having a lower temperature just taken from the outside, but even if the cooling efficiency is low, the temperature rise of the storage battery is suppressed. As a result, the difference between the temperature of the storage battery 9 in the assembled battery 3a included in the upper assembled battery group Gu and the temperature of the storage battery 9 included in the assembled battery 3b included in the lower assembled battery group Gl is reduced, so that each storage battery The variation in temperature can be reduced.

  Therefore, according to the present embodiment, regardless of whether the air flowing in the storage battery panel 1 is located upstream (position of the lower assembled battery group Gl) or downstream (position of the upper assembled battery group Gu), The temperature difference between the storage batteries 9 in the batteries 3a and 3b can be set within a predetermined range. Therefore, since all the assembled batteries 3a and 3b can properly perform the charging / discharging operation, the performance of the storage battery panel 1 can be fully exhibited, and there are problems caused by overheating of some of the storage batteries 9 in the assembled batteries 3a and 3b. Occurrence can be prevented.

The contour shape of the cross section in the direction orthogonal to the longitudinal direction of the air flow resistance adjusting members 13a and 13b is not limited to the above embodiment. Test to confirm that variation in the temperature rise of the batteries in the battery group occurs due to the difference in the contour shape of the cross section in the direction orthogonal to the longitudinal direction of the air flow resistance adjusting member, even if other configurations are the same. Carried out. FIG. 5 shows the contour shape of the cross section in the direction orthogonal to the longitudinal direction of the air flow resistance adjusting member used in this confirmation test and the dimensions of each part. In FIG. 5, the upward direction in the drawing is the direction in which the attracting air blower is arranged. Incidentally, the shape of No. 1 is the cross-sectional shape of the air flow resistance adjusting member of FIG. 1B, and the shape of No. 3 is the cross-sectional shape of the air flow resistance adjusting member of FIG. The unit of dimension is mm. 6A and 6B show the positional relationship between the measurement position where the temperature sensor used in the test is arranged and the temperature is measured and the air flow resistance adjusting member. FIG. 7A shows the battery temperature at the center position in the assembled battery, and FIG. 7B shows the variation in the measured temperature at each measurement position. In this test, a lithium ion battery having a capacity of 75 Ah and a voltage of 22.8 V was used, the distance (pitch) between the two storage battery rows was set to 5.5 mm, and the distance between the storage batteries in the storage battery row was set to 8.0 mm. did. And air was attracted | sucked from the upper direction of the assembled battery with the induced air blower, and the air flow was flowed in the assembled battery arrange | positioned in the housing | casing. The air flow of the induction blower was 14000 m ³ / h, the charge / discharge current was 150 A, and the temperature was measured after one cycle of charge / discharge. As can be seen from FIGS. 7A and 7B, it is understood that the cooling efficiency can be increased by adopting the first and second shapes. What shape is used as the shape of the air flow resistance adjusting member is appropriately determined according to the configuration of the assembled battery to be used.

  In this embodiment, a lithium ion secondary battery is used as the storage battery. However, other cylindrical storage batteries and capacitors that can be charged and discharged may be used.

  Further, in the present embodiment, the assembled batteries arranged in the upper and lower four stages are divided into two-stage assembled battery groups. For example, the upper and lower assembled batteries of three or more stages are each one stage of three or more assembled batteries. You may divide into a group and you may comprise so that the difference of an airflow resistance may be produced between at least 1 assembled battery group. Further, the number of storage batteries constituting the battery train and the number of battery trains constituting the battery group are also arbitrary. For example, the battery array may be composed of four or more storage batteries, and a battery group may be configured by combining three or more battery arrays, and the assembled battery may include six or more storage batteries. The air flow resistance adjusting member is preferably arranged in all spaces surrounded by four adjacent storage batteries in one assembled battery, but there may be places where the air flow resistance adjusting member is not arranged. In addition, the air flow resistance adjusting member may be disposed between two adjacent storage batteries in one assembled battery, and in that case, a space surrounded by the plurality of storage batteries together with the storage batteries belonging to the adjacent assembled batteries. Sometimes formed.

  According to the present invention, it is possible to reduce the variation in the temperature of each storage battery regardless of whether it is located upstream or downstream of the air circulating in the storage battery panel to cool each storage battery. In addition to fully exhibiting the performance of the panel, it is possible to prevent the occurrence of problems due to overheating of the storage battery.

DESCRIPTION OF SYMBOLS 1 Storage battery board 3a, 3b Battery assembly 5 Case 7 Attracting air blower 9 Storage battery 11 Holder 13a, 13b Air flow resistance adjustment member Gu Upper assembled battery group Gl Lower assembled battery group

Claims (6)

A plurality of battery arrays configured by arranging a plurality of cylindrical storage batteries at a predetermined interval in a first direction orthogonal to the longitudinal direction of the storage battery are orthogonal to the longitudinal direction and the first direction. A plurality of assembled batteries that are held between a pair of holders arranged so that the battery group arranged at a predetermined interval in the second direction is opposed to both sides in the longitudinal direction;
A housing that houses the plurality of assembled batteries therein;
An induction blower provided on the top plate portion of the housing and attracting air from inside the housing and discharging it to the outside;
A plurality of assembled battery groups configured by arranging two or more of the assembled batteries in the housing in the horizontal direction so that air flows through all the assembled batteries when the attraction blower is driven. Are arranged separately in the vertical direction in the housing,
In the assembled battery, an air flow resistance adjusting member is disposed in a space surrounded by at least two adjacent cylindrical storage batteries in order to adjust the resistance of the air flow generated by the attraction blower. Has been
In the two battery pack groups adjacent in the vertical direction, the cooling efficiency in the battery packs included in the battery pack group located on the upper side is the plurality of battery packs included in the battery pack group located on the lower side. The shape of the air flow resistance adjusting member in the plurality of assembled batteries included in the plurality of assembled battery groups is determined so as to be better than the cooling efficiency of the storage battery in the assembled battery. Storage battery panel. The air flow resistance adjusting member extends in the longitudinal direction;
The outline of the cross-sectional shape in the direction orthogonal to the longitudinal direction of the air flow resistance adjusting member includes first and second sides approaching upward, and third and fourth sides approaching downward. The storage battery board according to claim 1 having at least. A fifth side extending in the vertical direction is further formed between the first side and the third side;
A sixth side extending in the vertical direction is further formed between the second side and the fourth side;
A seventh side and an eighth side extending in the left-right direction are formed between the side 1 and the second side and between the third side and the fourth side, respectively. Storage battery board of description.   The cross-sectional area of the air flow resistance adjusting member in the plurality of assembled batteries included in the assembled battery group located on the upper side is within the plurality of assembled batteries included in the assembled battery group located on the lower side. The storage battery board of Claim 2 or 3 smaller than the cross-sectional area of the said airflow resistance adjustment member. The plurality of battery rows are composed of two battery rows arranged in parallel,
One airflow resistance adjusting member is disposed in a space surrounded by two adjacent cylindrical storage batteries included in one of the battery arrays and two adjacent storage batteries included in the other battery array. The storage battery board according to claim 1, 2, 3, or 4.   The storage battery board according to any one of claims 1 to 5, wherein the cylindrical storage battery is a cylindrical lithium ion battery.

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