JP2015118800A - Partition plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a partition plate capable of easily achieving improvement of heat dissipation and temperature equalization of a plurality of batteries housed in a storage battery housing box and capable of making lighter.SOLUTION: A partition plate 41 for partitioning a housing space of a battery 11 into right and left is provided. The partition plate 41 has opening parts K1 to K4 at a surface facing the battery 11. The partition plate 41 has a cavity part S between batteries 11 adjacent on both sides that opens to at least one of upper side, lower side, front side, and back side.

Description

  The present invention relates to a partition plate used in a storage battery storage box that stores a plurality of storage batteries between a bottom plate and an upper plate.

In recent years, interest in global environmental issues has increased and the introduction of clean energy has been promoted, and the development of storage batteries for power storage and smart grids with higher energy density and higher energy capacity has been demanded. A storage battery used in these applications is used as an assembled battery by connecting a plurality of single cells in series or in parallel.
In this type of battery pack, there is a battery pack storage box that stores a plurality of storage batteries side by side between a bottom plate and an upper plate, and a rib is provided in the battery case of the storage battery. Thus, a configuration that promotes heat dissipation has been proposed (see, for example, Patent Document 1).

JP 2010-277847 A

  However, the structure in which the rib is provided in the battery case has a small size of the ventilation opening, and there is a possibility that the heat dissipation is not sufficient or the heat dissipation amount may be biased, and the structure of the battery case must be changed to a rib type. There is a restriction that. Further, the conventional configuration has uneven heat dissipation for each storage battery, and the temperature for each storage battery tends to be biased. Moreover, weight reduction is desired from the viewpoint of improving earthquake resistance.

  The present invention has been made in view of the above-described circumstances, and can easily achieve improvement in heat dissipation and soaking of a plurality of storage batteries housed in a storage battery storage box, and can be reduced in weight. It is to provide a partition plate.

  In order to solve the above-described problems, the present invention is used in a storage battery storage box for storing a plurality of storage batteries between a bottom plate and an upper plate, and the partition plate for partitioning the storage space of the storage battery in the left and right directions. The plate has an opening on a surface facing the storage battery. According to this configuration, the heat dissipation of the storage battery is improved by the partition plate, and it becomes easy to achieve a uniform temperature of the plurality of storage batteries. Moreover, since the opening is provided, the weight of the partition plate can be reduced.

  Further, the present invention is characterized in that the partition plate has a hollow portion that opens to at least one of upper, lower, front, and rear between the storage batteries. According to this configuration, the heat of the storage battery can be exhausted into the hollow portion to further improve the heat dissipation, and the weight can be further reduced while ensuring the strength of the partition plate.

  In addition, the present invention includes left and right side plates that are in contact with opposite surfaces of the storage batteries adjacent to each other, and the side plates are spaced apart from each other at least between the upper and lower sides and the front and rear sides of the storage batteries. It touches. According to this configuration, it is possible to regulate the position of the storage battery with a wide span at least one of up and down and front and rear. Therefore, it is easy to ensure the heat dissipation of the storage battery, and the position of the storage battery is easily regulated by the partition plate.

  Further, the present invention is characterized in that the side plate includes a frame member that contacts the storage battery with an interval between the upper and lower sides and the front and rear sides, and a support member that bridges the inside of the frame member. According to this configuration, it is easier to ensure the strength of the side plate and to obtain a sufficient group compression force as compared with the case of only the frame shape.

  Further, the present invention includes a plurality of coupling bodies that connect the left and right side plates apart from each other left and right, and the plurality of coupling bodies include a coupling body that couples the left and right support members apart from each other left and right. Features. According to this configuration, it becomes easier to ensure the strength of the intermediate frame, and it becomes easier to obtain a high group compression force. Moreover, it becomes advantageous also for prevention of distortion of a storage battery storage box and improvement of earthquake resistance.

  In the present invention, it is possible to easily achieve improvement in heat dissipation and soaking of a plurality of storage batteries housed in the storage battery storage box, and to reduce the weight.

It is a figure which shows an assembled battery provided with the storage battery storage box which concerns on embodiment of this invention. It is the figure which looked at the storage battery storage box from the front. It is the figure which looked at the storage battery storage box from the upper part. It is a perspective view of a partition plate. FIG. 10 is a perspective view of a partition plate in Embodiment 5. It is a perspective view of the partition plate of Example 7. FIG. It is a perspective view of the partition plate of the comparative example 1.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Drawing 1 is a figure showing an assembled battery (storage battery system) provided with a storage battery storage box concerning an embodiment of the present invention.
The assembled battery 10 is an industrial assembled battery used for backup in the event of a disaster such as an emergency power supply or a private power generator, and stores a plurality of storage batteries (corresponding to single cells) 11 side by side. A box 22 is provided. These storage battery storage boxes 22 are stacked in multiple stages, and four corners of the lower upper frame 26 and the upper lower frame 27 adjacent to the upper and lower storage battery boxes 22 are connecting members (bolts and nuts). (Not shown).
In the present embodiment, the storage battery storage boxes 22 are arranged in four stages, and six storage batteries 11 are stored in each storage battery storage box 22, thereby configuring the assembled battery 10 storing 24 storage batteries 11. However, it is not limited to this configuration, and the number of stages and the number of stored storage battery storage boxes 22 can be changed as appropriate. Moreover, each storage battery storage box 22 is the same structure.

2 is a view of the storage battery storage box 22 as seen from the front, and FIG. 3 is a view as seen from above.
The storage battery storage box 22 includes a bottom plate 23, a top plate 24 disposed above the bottom plate 23 with a space therebetween, a pair of left and right side plates 25 connecting the left and right ends of the bottom plate 23 and the top plate 24, and a rear plate 30. And is formed in a box shape having a front opening storage portion 22A (FIG. 2) whose front surface is open. Each plate 23-25 which comprises this storage battery storage box 22 is manufactured with metal plates, such as iron and stainless steel.
The storage battery 11 is a control valve storage battery used for an emergency power source or the like, and includes a rectangular parallelepiped battery case 12 that accommodates electrodes and an electrolyte solution, and a battery case lid 13 that constitutes a front portion of the battery case 12. ing. The battery case 12 is formed in a structure without ribs. The battery case lid 13 is provided with a positive terminal 15A, a negative terminal 15B, and a control valve 15C. In the following description, the positive electrode terminal 15A and the negative electrode terminal 15B are denoted as the terminal 15 when it is not necessary to distinguish between them.

The storage battery 11 is loaded in the storage battery storage box 22, and the battery case lid 13 to which the terminals 15 and the like are attached faces the front of the storage battery storage box 22 and protrudes forward from the storage battery storage box 22. Is done. After loading the storage battery 11 in this way, a holding plate (also referred to as a stopper) 31 is fixed to the front portion of the storage battery storage box 22.
As shown in FIG. 2, each holding plate 31 is fixed to the bottom plate 23 and the upper plate 24 of the storage battery storage box 22 by a pair of upper and lower fastening members 32, holds each storage battery 11 from the front, and the storage battery in normal use. The storage battery 11 is prevented from falling off from the storage box 22. The holding plate 31 can prevent the storage battery 11 from falling off due to an earthquake or a fall. A battery in which a plurality of storage batteries 11 are loaded in a single storage battery storage box 22 and fixed by a pressing plate 31 is referred to as a “unit storage battery”.

When the assembled battery 10 is used, the terminals 15 of the storage batteries 11 are electrically connected to each other by a connection plate 33 (see FIGS. 1 and 2) that is a conductor. The connection plate 33 is configured as an “assembled battery” in which a necessary number of storage batteries 11 are connected in series or in parallel by connecting terminals 15 of adjacent storage batteries 11 to ensure necessary voltage and necessary capacity.
In addition, in FIG. 1, the connection board 33 is formed with a copper plate, and the case where the storage battery 11 is connected in series is shown. The connection plate 33 is not limited to a copper plate, and other conductors such as other metal plates and wirings can also be used.

As shown in FIGS. 1 to 3, the storage battery storage box 22 is provided with a plurality of partition plates 41, which are partition plates that partition the storage space of the storage battery 11 to the left and right. In the example shown in FIGS. 1-3, the storage battery 11 and the partition plate 41 are arrange | positioned alternately, and when the storage battery 11 is six, the five partition plates 41 are provided.
As shown in FIGS. 1 to 3, the middle partition plate 41 has a partition plate body 41 </ b> X that forms a cavity S therein, and the cavity S is provided in the bottom plate 23, the upper plate 24, and the rear plate 30. An air passage 55 is formed between the left and right storage batteries 11 by communicating with the slit 51. The air passage 55 can efficiently release heat from the left and right storage batteries 11 to the outside.

FIG. 4 shows a perspective view of the partition plate 41. The partition plate main body 41X is integrally provided with a pair of left and right side plates 42 and a plurality of connecting bodies 43 that connect the side plates 42 to each other by a predetermined distance.
The left and right side plates 42 have the same shape and function as battery contact portions that come into contact with (abut against) the side surfaces of the left and right storage batteries 11 (corresponding to the faces where the storage batteries 11 face each other). More specifically, each side plate 42 has a front frame 42A, an intermediate frame 42B, and a rear frame 42C with an interval in the front-rear direction, an upper frame 42D that connects the upper ends of these frames 42A to 42C, and a lower end Are integrally provided with a lower frame 42E.

That is, the front frame 42A, the rear frame 42C, the upper frame 42D, and the lower frame 42E, which are battery contact portions, form an endless four-sided frame (frame member) 42F, and the intermediate frame 42B extends vertically in the four-sided frame 42F. It functions as a reinforcing member that is reinforced by crosslinking. Accordingly, the openings K1 and K2 that open the cavity S to the left and right are formed, and the side plate 42 can be reinforced by the intermediate frame 42B as compared to the case where the openings are formed in a simple four-sided frame shape.
The four-sided frame 42F is formed in a shape extending along the inner shape of the storage battery storage box 22, and serves as a support member that supports the upper plate 24 of the storage battery storage box 22 (upper storage battery storage box 22, storage battery 11 and the like). Function.

That is, in this configuration, as shown in FIGS. 4 and 2, the upper frame 42 </ b> D and the lower frame 42 </ b> E are in contact with the opposing surfaces of the adjacent storage batteries 11 with a space therebetween in the vertical direction. And the lower position.
Further, as shown in FIGS. 4 and 3, the front frame 42A, the intermediate frame 42B, and the rear frame 42C are in contact with the opposing surfaces of the adjacent storage batteries 11 with an interval in the front-rear direction. Position the front and rear intermediate positions and the rear position.
Accordingly, it is easy to position each storage battery 11 while securing the openings K1 and K2 that open toward the storage batteries 11 on both sides. Further, as will be described later, the intermediate frame 42B ensures strength and makes it easy to obtain a sufficient group compression force.

The intermediate frame 42 </ b> B is provided at a position in contact with a substantially middle region in the front and rear direction of the side surface of the storage battery 11. Thereby, the deformation | transformation of the front-back center part resulting from the expansion | swelling by the internal reaction of the storage battery 11 can be efficiently suppressed by the intermediate frame 42B. In addition, when the intermediate frame 42B is widened, the strength is improved, but it becomes a factor of heat insulation due to an increase in weight and air accumulation between the battery case 12 and the intermediate frame 42B. Conversely, when the intermediate frame 42B is narrow, sufficient group compression force cannot be obtained. For this reason, it is preferable to make it the width | variety which obtains sufficient group compression force, ensuring intensity | strength.
The total opening area of the openings K1 and K2 that open toward the storage battery 11 on both sides occupying the area of the side plate 42 may be 45% to 98%, and more preferably 68% to 94%.
The side plate 42 can be reinforced even if an intermediate frame (reinforcing member, support member) that bridges the inside of the four-sided frame 42F in the front-rear direction is provided instead of the intermediate frame 42B or in addition to the intermediate frame 42B. And so on. Thereby, the intensity | strength of the partition plate 41 can be improved efficiently. If sufficient strength can be secured, a part or all of the intermediate frame 42B may be omitted.

The connecting body 43 connects the left and right side plates 42 with a cavity S therebetween, and opens the cavity S up and down and front and rear. Specifically, the connecting body 43 connects a pair of upper and lower front connecting bodies 43A that connect the front ends of the left and right side plates 42 with a space therebetween, and a front and rear intermediate portion of the left and right side plates 42 with a space therebetween. And a pair of upper and lower rear connection bodies 43C for connecting the rear ends of the left and right side plates 42 with a space in the vertical direction.
As described above, the connecting body 43 connects the left and right side plates 42 with an interval in the front-rear and up-and-down directions, so that openings KA, KB, KC, and KD that open the cavity S in the up-down and front-and-rear directions can be formed. it can.

In this case, since the intermediate connecting body 43B is provided, it becomes easier to improve the connection strength of the left and right side plates 42 and consequently the strength of the partition plate 41, compared to the case where the intermediate connecting body 43B is not provided. Furthermore, since the intermediate coupling body 43B of this configuration also connects the intermediate frames 42B of the left and right side plates 42, the bending of the left and right side plates 42 can be effectively suppressed.
In addition, the intermediate coupling body 43B connects the upper end, the upper and lower intermediate portion, and the lower end of the intermediate frame 42B with a space in the front-rear direction, so that the flow of air flowing through the cavity S up and down and front and rear can be prevented. The strength of the partition plate 41 can be effectively improved. In addition, when intensity | strength can be ensured, you may abbreviate | omit some or all of the intermediate | middle coupling body 43B. Further, the intermediate coupling body 43B also serves as a coupling member that couples the upper frames 42D and the lower frames 42E.

The partition plate 41 may be formed of a material having high thermal conductivity, may be the same metal plate as the storage battery storage box 22, and uses various metal materials such as copper, aluminum alloy, magnesium alloy, resin, and the like. It is possible. Moreover, you may shape | mold the partition plate 41 using the extrusion molding method, the die-cast molding method, the blow molding method, etc.
When the middle partition plate 41 is arranged in the storage battery storage box 22, the upper and lower openings KA and KB of the middle partition plate 41 communicate with the slits 51 provided in the bottom plate 23 and the upper plate 24 as shown in FIG. 3. To do. Thereby, the ventilation path 55 which can distribute | circulate air up and down is formed, and the heat | fever from the storage battery 11 on either side can be discharge | released upwards.

Moreover, since the partition plate 41 of this configuration includes the openings K1 and K2 that open the cavity S toward the left and right storage batteries 11, the heat of the storage battery 11 is directly radiated into the cavity S, and the heat is dissipated. It becomes easy to increase the effect.
In addition, since the openings K1 and K2 are provided, the partition plate 41 can be reduced in weight compared to the configuration without the openings K1 and K2. That is, the partition plate 41 can be reduced in weight while ensuring sufficient strength.
Here, the partition plate 41 reinforces the strength of the storage battery storage box 22 to obtain sufficient earthquake resistance, and reduces the width of the air passage 55 due to expansion due to an internal reaction of the storage battery 11 and the storage battery 11. What is necessary is just to comprise so that it may have the intensity | strength which can suppress the fall of reaction efficiency.

As shown in FIGS. 2 and 4, the opening KC in front of the partition plate 41 communicates with a slit 31 </ b> A provided in the pressing plate 31. Thereby, the heat from the left and right storage batteries 11 can be released forward. Further, the rear opening KD of the partition plate 41 communicates with a slit 51 provided in the rear plate 30. Thereby, the ventilation path 55 in which air can flow freely in the front and rear is formed, and heat from the left and right storage batteries 11 can be released in the front and rear. In addition, you may comprise so that the heat | fever from the storage battery 11 on either side may be discharge | released only to the front, without providing the slit 51 in the backplate 30. FIG.
Here, since the storage battery 11 has a higher current density on the battery case lid 13 side to which the terminals 15 and the like are attached, the temperature on the front side tends to be higher than that on the rear side. Therefore, if it is configured to release heat from the left and right storage batteries 11 only forward, the temperature difference between the front side and the rear side of the storage battery 11 can be reduced, and the temperature of the storage battery 11 itself is equalized (heat equalization). Can be achieved.

The front-rear length (= front-rear length of the side plate) LA (see FIG. 4) of the partition plate 41 is formed to be substantially the same as the depth (front-rear length) L1 (see FIG. 3) of the storage battery storage box 22. The height HA (= the height of the side plate 42) of the middle partition plate 41 is formed to be substantially the same as the distance H1 (see FIG. 2) between the bottom plate 23 and the upper plate 24 of the storage battery storage box 22. Thus, the intermediate partition plate 41 is erected in a state of being sandwiched between the bottom plate 23 and the upper plate 24 of the storage battery storage box 22, and partitions the internal space (front opening storage portion 22A) of the storage battery storage box 22 to the left and right. . Further, the partition plate 41 can be inserted into and removed from the front opening storage portion 22 </ b> A of the storage battery storage box 22, and can be slid left and right along the bottom plate 23 and the upper plate 24.
Therefore, the position of the partition plate 41 can be easily adjusted according to the left and right positions of the storage battery 11, and the partition is arranged so that there is no gap between the storage battery 11 as shown in FIGS. 1 to 3. The plate 41 can be easily arranged. With this arrangement, the left and right side plates 42 of the partition plate 41 are in close contact with the side surfaces of the left and right (both adjacent) storage batteries 11, and the heat of the storage battery 11 is released into the cavity S via the side plates 42.

  Further, as shown in FIG. 3, the slit 51 provided in the bottom plate 23 has a rectangular hole shape that is long in the front-rear direction, and has a width (horizontal length) WS of the upper and lower cavities S of the partition plate 41. The width WA is equal to or smaller than that, and the front-rear length LS is formed in a shape equal to or smaller than the front-rear length LA of the partition plate 41. For this reason, even if the position of the partition plate 41 is slightly shifted from side to side or front and back, each slit 51 can be communicated with the cavity S that opens up and down of each partition plate 41. The slit 52 provided on the upper plate 24 is the same as the slit 51 described above.

Further, when the storage battery storage boxes 22 are stacked in multiple stages, as shown in FIG. 1, a space portion is formed between the upper and lower storage battery storage boxes 22 so as to be continuously communicated with the left and right. For this reason, the outside air is sucked up between the upper and lower storage battery storage boxes 22 by the ventilation in the cavity S. Thereby, the heat between the upper and lower storage battery storage boxes 22 can be efficiently discharged via the cavity S, and the heat dissipation effect of the storage battery 11 can be improved.
In addition, when the storage battery storage boxes 22 are stacked in multiple stages, the storage box 22 itself may bend due to the weight of the storage battery storage box 22, which may cause the storage battery 11 to be compressed. Since 41 has the front frame 42A, the intermediate frame 42B, and the rear frame 42C which extend up and down, the bending of the storage box 22 can be suppressed and the storage battery 11 can be prevented from being compressed. In addition, by increasing the open area of the partition plate 41, the weight can be reduced, and the influence of the weight of the partition plate 41 on the bending of the storage box 22 can be reduced.

Further, the openings KA to KD other than the openings K1 and K2 to the storage battery 11 of the partition plate 41 have a partially closed structure, thereby blocking the ventilation to the top and bottom and / or the front and back. It is possible to reduce temperature deviation (heat dissipation unevenness). Thereby, the soaking | uniform-heating of each storage battery 11 can be achieved.
Next, the Example and comparative example of the partition plate 41 are demonstrated. In addition, an Example is not limited to the following.

<Example 1>
Six square-type valve-regulated lead-acid batteries 11 having a 10-hour rate rated capacity of 1000 Ah are stored in the storage battery storage box 22 provided with slits 51 in the bottom plate 23, the upper plate 24, and the rear plate 30 at positions facing the middle partition plate 41. And five partition plates 41 were alternately loaded so that the storage battery 11 was arrange | positioned at both ends. Next, after loading the partition plate 41, the pressing plate 31 was disposed between the storage batteries 11. Then, each terminal 15 of the storage battery 11 was connected using the connection board 33, and the assembled battery 10 was produced.
The partition plate 41 to be loaded between the storage batteries 11 has a width WA of the cavity S (see FIG. 3) = 7 mm, and the intermediate frame (support member) 42B is located at the center of the partition plate 41 as shown in FIG. Thus, a configuration is provided in which a pair is provided on the left and right sides with a width W2 = 60 mm in the front-rear direction. Moreover, as shown in FIG. 4, the opening part of the partition plate 41 is made into the up-down direction, the front-back direction, and a battery contact surface (it is set as the structure which has opening part KA, KB, KC, KD, K1, K2), The external dimensions were vertical HA = 303 mm and depth LA = 463 mm. Since the side plate 42 having a thickness of 1.5 mm is used, the width W1 of the partition plate 41 is 10 mm.

<Example 2>
Example 1 is the same as Example 1 except that the width WA of the cavity S of the partition plate 41 is 17 mm. In this case, the width W1 of the partition plate 41 is 20 mm.

<Example 3>
Example 1 is the same as Example 1 except that the width WA of the cavity S of the partition plate 41 is 27 mm.
In this case, the width W1 of the partition plate 41 is 30 mm.

<Example 4>
Example 2 is the same as Example 1 except that the width WA of the hollow portion S of the middle partition plate 41 is 17 mm and the width W2 of the intermediate frame 42B is 6 mm.

<Example 5>
The width WA of the hollow portion S of the middle partition plate 41 is set to 17 mm, and as shown in FIG. 5, the intermediate frame 42B extends front and rear at the central portion of the middle partition plate 41, and has a pair of left and right with a vertical width W2 = 60 mm. It was set as the structure provided. The rest is the same as in the first embodiment.

<Example 6>
Example 5 is the same as Example 5 except that the width WA of the hollow portion S of the middle partition plate 41 is 17 mm and the width W2 of the intermediate frame 42B is 6 mm.

<Example 7>
The width WA of the cavity S of the partition plate 41 is set to 17 mm, and as shown in FIG. 6, the intermediate frame 42 </ b> B is provided with a pair of left and right with a width W2 = 60 mm in the vertical direction and the front-rear direction of the central portion of the partition plate 41. Other than the above, the second embodiment is the same as the second embodiment. In Example 7, as shown in FIG. 6, openings K1, K2, K3, and K4 are formed as openings that open the cavity S to the left and right.

<Example 8>
The width WA of the hollow portion S of the middle partition plate 41 is set to 17 mm, and the intermediate frame 42B has a width W2 = 6 mm in the vertical direction and the front-rear direction of the middle portion of the middle partition plate 41, and a pair on the left and right. It is the same.

<Example 9>
The width WA of the hollow portion S of the middle partition plate 41 is set to 17 mm, the intermediate frame 42B extends vertically at the center of the middle partition plate 41, and the pair of front and rear directions has a width W2 = 30 mm with respect to the left and right open portion dimensions. Example 2 is the same as Example 2 except that it is provided at an equal distance.

<Example 10>
The width WA of the hollow portion S of the middle partition plate 41 is set to 17 mm, and the intermediate frame 42B extends in the front-rear direction at the center portion of the middle partition plate 41, and the vertical width W2 = 30 mm. Except for equidistant distances, the second embodiment is the same as the second embodiment.

<Comparative Example 1>
As shown in FIG. 7, the opening part of the partition plate 41 is only the opening parts KA, KB, KC, KD in the vertical and front-rear directions, and the battery contact surface facing the storage battery 11 (opening part K1, shown in FIG. 4). K2) has a closed structure. Further, the width WA of the hollow portion S of the partition plate 41 was 27 mm, and the outer dimensions were vertical HA = 303 mm, depth LA = 463 mm, and width W1 = 30 mm.

<Comparative Example 2>
A conventional configuration in which the partition plate 41 is not provided and the storage battery storage box 22 does not have the slit 51 is adopted.

<Comparative Example 3>
It is the same as that of the comparative example 1 except having provided the steel plate of thickness 3mm.

<Comparative Example 4>
Although it has the cavity S, it is the same as that of Example 1 except having the partition plate 41 that does not provide the open parts (openings KA to KD, K1, and K2).

(test)
When the storage battery 11 is used, the most heat-generating situation is during charging. Therefore, each of the storage batteries 11 of Examples 1 to 11 and Comparative Examples 1 to 3 is discharged at 0.1 CA (50 A) at an ambient temperature of 25 ° C. for 10 hours, and then a CC of 0.2 CA (100 A) is obtained. -CV charge was performed for 15 hours, and the temperature of the storage battery 11 after 3 hours was measured.
In each example, heat dissipation (evaluation including soaking), partition weight (weight of the partition plate 41), group compression force, rack distortion (strain of the storage battery storage box 22) in five stages (◎ ○ ● △ × ) And relative results are shown in Table 1.
Here, ◎ indicates the best, next ○ is excellent, next ● is excellent, Δ is slightly inferior, and x is inferior. In addition, the evaluation was made with 4 points, ○, 3 points, ●, 2 points, Δ, 1 point, and 0 points. In addition, importance was similarly evaluated for each item, and the score was treated as a coefficient. For example, in the case of Example 1, heat dissipation 3 × 4 points + partition weight 3 × 3 points + group compression 3 × 1 points + rack strain 3 × 1 points = 27 points. Judgment was evaluated as ◎ for 30 points or more, ◯ for 20 points or more, △ for 10 points or more, and x determination when there was at least one x.

Comparative Examples 1 to 4 resulted in inferior heat dissipation as compared with Examples 1 to 10 including the partition plate 41 that was open at least on the left and right. Examples 1-3 changed the width | variety WA of the cavity S of the partition plate 41, and if the dimension was 7 mm or more, the heat dissipation became a sufficient result.
In addition, although the comparative example 1 showed the predominance with respect to group compression and rack distortion, since the heat dissipation and the partition weight were inferior, it became a score lower than Examples 1-10. In addition, Comparative Example 2 was ineffective against group pressure and rack distortion.

When Examples 2, 4, 5, and 6 were compared, the heat dissipation was better when the width W2 of the intermediate frame (support member) 42B was 6 mm than 60 mm. In addition, the intermediate frame 42B has a result that the configuration extending vertically is more effective against rack distortion than the configuration extending front and rear.
Comparing Examples 4, 6, and 8, the heat dissipation is equivalent, but with regard to group compression and rack distortion, Example 8 having the intermediate frame 42B in the cross shape in the vertical and front-rear directions is better. It became. When Examples 2, 7, 9, and 10 are compared, when a plurality of pairs of intermediate frames 42B are provided, the heat dissipation is equivalent to that of one pair, but when two pairs are provided in the same direction, the storage battery contact surface The central part could not be held down, resulting in poor group pressure.

Moreover, when the inventors examined, the width WA of the cavity S is in the range of 7 to 27 mm, and a sufficient heat dissipation effect can be exhibited. More preferably, 17 mm has the width W1 of the partition plate 41. It was easy to secure the heat dissipation effect while suppressing. In addition, even if it expanded beyond the said range, the thermal radiation effect did not change substantially.
Further, the height of the hollow portion S of the partition plate 41 (height of the air passage 55) increases as the heat spreads upward and downward. However, it is preferable to suppress the height to some extent from the viewpoint of preventing the center of gravity from shifting upward. . The height of the air passage 55 also depends on the structure of the assembled battery 10.

  Further, as another aspect of the partition plate 41, the front opening KC may not be provided, or the rear opening KD may not be provided. Further, the upper opening KA may not be provided, or the lower opening KB may not be provided. For example, all the openings KA to KD may be closed. However, it is advantageous for heat dissipation that the partition plate 41 is opened to at least one of upper, lower, front, and rear. In the present embodiment, a space portion is formed between the upper and lower storage battery storage boxes 22 so as to be continuously communicated with the outside air in the left and right directions (see FIG. 1). Heat dissipation is promoted through the section.

That is, the partition plate 41 of this configuration can promote heat dissipation of the storage battery 11 by having any one of the openings K1 to K4 on the surface facing the storage battery 11, and further, upward, downward, forward, and Heat release can be further promoted by opening at least one of the rear.
Furthermore, a plurality of types of partition plates 31 having different patterns of openings and closing portions may be prepared as described above, and a plurality of types of partition plates 31 may be used in combination. According to this structure, it becomes easy to finely adjust the heat dissipation amount of the storage battery 11 as the variation of the partition plate 41 increases.

  Since all of the storage battery 11, the partition plate 41 and the storage battery storage box 22 are industrial products, there are surface irregularities and distortions, bending due to the mass of the storage battery 11, etc., and therefore between the storage battery 11 and the partition plate 41. In some cases, a slight gap may occur. Furthermore, the battery case 12 of the storage battery 11 may have a punching taper for molding. Therefore, it is preferable that the storage battery 11 and the intermediate frame 42B of the partition plate 41 are in contact with each other, but in practice, there may be a gap of several mm between the storage battery 11 and the partition plate 41. The width of the gap is preferably in the range of 0 mm to 5 mm, and more preferably 0 mm to 2 mm. By setting it as the said range, group compression can be performed effectively.

As described above, since the partition plate 41 of the present embodiment has any one of the openings K1 to K4 on the surface facing the storage battery 11, the partition plate 41 can improve the heat dissipation of the storage battery 11. it can. Further, since any one of the openings K1 to K4 is provided, the weight of the partition plate 41 can be reduced.
Moreover, since the partition plate 41 has a cavity S that opens to at least one of the upper, lower, front, and rear between the adjacent storage batteries 11, the heat of the storage battery 11 is discharged into the cavity S to further dissipate heat. While being able to improve the property, it is possible to further reduce the weight while securing the strength of the partition plate 41. By achieving both strength and weight reduction, it is easy to improve earthquake resistance in addition to preventing distortion of the storage battery storage box 22.

Here, the temperature increase of the plurality of storage batteries 11 accommodated in the storage battery storage box 22 may vary depending on the position where the storage batteries 11 are accommodated. For example, the storage battery 11 located at a position where heat is easily radiated to the outer space (for example, both ends and corner positions) is relatively suppressed in temperature rise, and the storage battery 11 located at a position where the heat is not easily radiated to the outer space (for example, left and right central positions) The temperature rises relatively easily.
In the storage battery storage box 22 and the assembled battery 10 of the present embodiment, the partition plate 41 is used as a partition of the storage battery 11 at a position where the temperature rises relatively easily, and the temperature rise is relatively suppressed. For the partition of the storage battery 11, another partition plate 41 with relatively low heat dissipation or the conventional partition plate exemplified in Comparative Examples 1 and 2 is used.

For example, the partition of the storage battery 11 at the position where the temperature rises most easily has the partition plate 41 shown in FIG. 4, that is, the cavity S that opens upward, downward, forward, and rear, and the cavity S A partition plate 41 having openings K1 and K2 that open toward the storage batteries 11 on both sides is used. Thereby, it becomes possible to suppress a temperature rise significantly and to suppress the temperature deviation with the other storage battery 11. Therefore, by using the partition plate 41 of the present embodiment locally or in combination, it is possible to equalize the temperature of each storage battery 11.
As described above, in the present embodiment, the heat dissipation of the storage battery 11 accommodated in the storage battery storage box 22 and the heat equalization of each storage battery 11 are easily realized, and the weight reduction and the improvement of the earthquake resistance are also achieved. It becomes possible.

Moreover, the partition plate 41 has the left and right side plates 42 that contact the opposing surfaces of the adjacent storage batteries 11, and the side plate 42 is one of the openings K1 to K4 at least between the upper and lower sides and the front and rear sides. Since the contact with the storage battery 11 is provided with an interval corresponding to, the position of the storage battery 11 can be regulated with a wide span at least one of up and down and front and back. Therefore, it is easy to ensure the heat dissipation of the storage battery 11, and the position of the storage battery 11 is easily regulated by the partition plate 41.
In addition, the side plate 42 includes a four-sided frame (frame member) 42F that contacts the storage battery 11 with an interval between the upper and lower sides and the front and rear, and an intermediate frame (support member) 42B that bridges the inside of the four-sided frame (frame member) 42F. Therefore, as compared with the case of only the frame shape, it is easy to ensure the strength of the side plate 42 and to easily obtain a sufficient group compression force. A frame member other than the four-way frame may be applied.

  Further, since the plurality of connecting bodies 43 that connect the left and right side plates 42 apart from each other left and right include the intermediate connecting bodies 43B (see FIG. 4) that connect the left and right intermediate frames 42B to the left and right, It becomes easier to secure the strength, and it becomes easier to obtain a high group compression force. Moreover, it becomes advantageous also for prevention of distortion of the storage battery storage box 22 and improvement of earthquake resistance.

The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied without departing from the gist of the present invention.
For example, in the above-described embodiment, the case where the presser plate 31 is provided between the storage batteries 11 in the vertical direction of the storage battery storage box 22 has been described. You may provide in a part.
In addition, a closing member (for example, a flat plate-like component) that closes the openings KA to KD and K1 to K4 of the partition plate 41 is provided as a separate part, and the openings KA to KD and K1 to K4 are provided using this closing member. May be configured to close appropriately. In this case, it is possible to make the partition plate 41 alone or to reduce the types.
Further, the partition plate 41 may be fixed to the storage battery storage box 22. Moreover, although the case where the partition plate 41 and the storage battery 11 are arrange | positioned alternately was demonstrated, it is not restricted to this. In some cases, two or more pairs of intermediate frames 42B may be provided.

DESCRIPTION OF SYMBOLS 10 Assembled battery 11 Storage battery 22 Storage battery storage box 23 Bottom plate 24 Top plate 25 Side plate 31 Holding plate 31A Slit 41 Middle partition plate 42 Side plate 42B Intermediate frame (support member)
42F Four-sided frame (frame member)
43 connection body 43B intermediate connection body 51 slit (opening part) of storage battery storage box
55 Ventilation path S Cavity KA-KD, K1-K4 Opening

Claims (5)

Used in a storage battery storage box that stores a plurality of storage batteries between a bottom plate and an upper plate, and in a partition plate that partitions the storage space of the storage battery into left and right,
The said partition plate has an opening part in the surface facing the said storage battery, The partition plate characterized by the above-mentioned.   The said partition plate has a cavity part opened to at least any one of upper direction, the downward direction, the front, and back between the said storage batteries, The partition plate of Claim 1 characterized by the above-mentioned. Having left and right side plates in contact with opposing surfaces of the storage batteries on both sides;
The partition plate according to claim 1 or 2, wherein the side plate is in contact with the storage battery with an interval corresponding to the opening at least between upper and lower and front and rear.   The partition plate according to claim 3, wherein the side plate includes a frame member that contacts the storage battery with an interval between the upper and lower sides and the front and rear sides, and a support member that bridges the inside of the frame member. A plurality of connecting bodies that connect the left and right side plates apart from each other left and right,
The partition plate according to claim 4, wherein the plurality of coupling bodies include a coupling body that couples the left and right support members apart from each other in the left-right direction.

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