JP2011253746A - Storage battery module and storage battery system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage battery module enabling secure heat radiation of each storage battery cell.SOLUTION: A storage battery module 20 stores an electrode part of a plurality of cylindrical batteries 1 arranged in a plurality of rows and steps, in a battery box 30 by holding and fixing by a battery holding plate 5. In each of a battery box pedestal 31 constituting the battery box 30 and a ceiling board of an outer casing 32, a cooling air intake slit 36 and a cooling air discharge slit 37 are bored at a plurality of positions arrayed adjacent to each of two facing end sides in parallel with an arrangement direction of the battery holding plate 5 closely contacting with the electrode part of each cylindrical battery 1, and cooling air blown from outside of the battery box 30 is taken in from the cooling air intake slit 36 and directly sent to each electrode part of the plurality of cylindrical batteries 1. Also, cooling air is discharged from the cooling air discharge slit 37 to outside of the battery box 30 after heat exchange with each electrode part of the cylindrical batteries 1.

Description

  The present invention relates to a storage battery module and a storage battery system, and more particularly, to a storage battery module that can efficiently exhaust heat from storage battery cells and a storage battery system in which a plurality of the storage battery modules are mounted.

  In the prior art, “Highly reliable power supply system using large nickel metal hydride storage battery” by Akihiro Miyasaka et al. Of Non-Patent Document 1 (The Electrochemical Society Technical Committee New Battery Concept Committee, 61st New Battery Concept Committee Lecture As shown in “FIG. 3.3 Battery module” of pp1-4), the cooling mechanism of the storage battery module uses a cooling fan to discharge the air taken from the front of the storage battery module to the back. It was a structure.

  That is, in the conventional storage battery module cooling mechanism described in Non-Patent Document 1, as shown in FIG. 3, 10 cylindrical 95AhNiMH storage battery cells (diameter φ60 mm × length L170 mm) are connected in series as a cylindrical battery. Thus, one storage battery module is configured, and the entire storage battery module is forcibly cooled by a cooling fan. FIG. 3 is a schematic diagram showing a mounting structure of a conventional storage battery module, and FIG. 3A is a perspective view showing a state of the storage battery module configured by connecting 10 cylindrical batteries 1 in series. 3 (B) is a perspective view showing a structure of a battery box on which a storage battery module is mounted.

  As shown in FIG. 3 (A), in the storage battery module 20, each cylindrical battery 1 (each storage battery cell) is arranged in five rows and two stages with a space width of 5 mm apart from each other. In order to make it easy to connect the cylindrical batteries 1 in series, the adjacent cylindrical batteries 1 exchange the positions of the positive electrode 2 and the negative electrode 3 alternately so that the adjacent positive electrode 2 and the negative electrode 3 face the same surface. Are connected to each other between the positive electrode 2 and the negative electrode 3 of each adjacent cylindrical battery 1 by a bus bar (battery connector) or a power line, and are gripped by an insulating battery gripping plate 5, that is, a battery fixing plate. And fixed structure. It should be noted that the battery gripping plate 5 is placed on the portion of the battery gripping plate 5 that grips each cylindrical battery 1 in order to facilitate the attachment / detachment of each cylindrical battery 1 when the cylindrical battery 1 is replaced. A dividing surface 6 is formed for removing a part (upper and lower plates).

  Further, as shown in FIG. 3 (B), the battery gripping plate 5 that grips each cylindrical battery 1 is placed on the battery box base 11 and covers the outer box 12 of the battery box 10 from above. Thus, the storage battery module 20 is housed in the battery box 10.

  Here, the outer case 12 of the battery case 10 has two side plates that are in a positional relationship parallel to the center line of each of the 10 cylindrical batteries 1 connected in series. It is formed as a face plate, and a vent hole formed in the other opposing flat plate (the side plate on the back side of the outer box 12 in FIG. 3 (B)) is a suction port 15 for sucking air. A vent hole formed in the flat plate (a side plate on the front side of the outer box 12 in FIG. 3B) forms an exhaust port for exhausting air that has exchanged heat with each cylindrical battery 1. Yes.

  Of the ten cylindrical batteries 1 connected in series, the positive electrode 2 or negative electrode 3 of the first cylindrical battery 1 and the negative electrode 3 or positive electrode 2 of the last cylindrical battery 1 are shown in FIG. As described above, the output terminal of the electrical connector 14 attached to the other opposing flat plate of the outer case 12 of the battery case 10 (the side plate on the near side of the outer case 12 in FIG. 3B) is electrically connected to the output terminal by the bus bar or the power line. Connected.

  Furthermore, as shown in FIG. 3 (B), one opposing plane plate (see FIG. 3B) of the outer case 12 of the battery case 10 has no temperature variation during charging and discharging of the storage battery cell and does not exceed the upper limit temperature. 3 (B), a cooling fan 13 with a box is attached to the front side plate of the outer box 12, and the other opposing flat plate of the outer box 12 of the battery box 10 (in FIG. 3B) The entire storage battery module 20 including the ten cylindrical batteries 1 housed in the battery box 10 is obtained by sucking cooling air from the suction port 15 formed in the side plate on the back side of the outer box 12. It is forcibly cooled.

  Further explanation is as follows. In the conventional storage battery module 20, the plurality of cylindrical batteries 1 in the battery box 10 are placed on the battery box pedestal 11 via the battery gripping plate 5, and vent holes are formed at positions facing each other as side plates. Two opposing flat plates are provided, and one of the opposing flat plates is housed in a battery box 10 covered with an outer box 12 to which a cooling fan with box 13 and an electrical connector 14 are attached. ing. Each cylindrical battery 1 placed on the battery box pedestal 11 has a multi-stage configuration, each central axis is horizontal (positional relationship parallel to the bottom surface of the battery box pedestal 11), and each cylindrical battery. The central axis 1 is arranged so as to be parallel to the opposing flat plate of the outer box 12.

  Further, the cooling fan 13 with a box is driven so as to exhaust heat generated from the plurality of cylindrical batteries 1 by outside air (air) taken in from a suction port 15 of a vent hole formed in the opposing flat plate. It is configured.

  That is, since the plurality of cylindrical batteries 1 in the storage battery module 20 are arranged as described above, by driving the box-mounted cooling fan 13 attached to one opposing flat plate, the other opposing flat plate is opposed. The outside air taken in from the vent hole drilled as the suction port 15 hits the side surface of the cylindrical battery 1 closest to the vent hole and wraps around the back surface, and then hits the side surface of the adjacent cylindrical battery 1 and hits the back surface thereof. By repeating the wraparound, heat is exchanged with each of the plurality of cylindrical batteries 1 that are heating elements, and the heat is exhausted by being exhausted from a vent hole formed as an exhaust port on one opposing flat plate.

  At this time, since the battery shape of each cylindrical battery 1 (storage battery cell) constituting the storage battery module 20 in the battery box 10 is cylindrical, unnecessary turbulent flow of the introduced outside air is suppressed, and furthermore, each cylinder Since the central axis of the battery 1 is arranged in the battery box 10 so as to be horizontal and parallel to the opposing flat plate, the ventilation resistance can be reduced. As a result, the exhaust heat from the battery box 10 is efficiently performed in the direction in which the opposed flat plates face each other.

Akihiro Miyasaka, Takahisa Masayo; “Highly reliable power supply system using large nickel metal hydride storage battery”, Electrochemical Society Technical Committee New Battery Concept Committee, 61st New Battery Concept Committee Lecture, pp1-4.

  However, in the conventional cooling mechanism for the storage battery module 20 as described in Non-Patent Document 1, the discharge current is as high as 2.5 C to 3 C (C: rated capacity of the storage battery module). When a discharge occurs, the amount of heat is 100 times that of the charge / discharge operation at a discharge rate (discharge current) of 0.2 to 0.3 C generally used by conventional battery manufacturers. There is a problem that it is impossible to cope with such high temperature heat generation.

  In particular, since a large amount of heat due to contact resistance is generated along with the bus bar or the power line at the cell connection portion (that is, the electrode portion) of the positive electrode 2 and the negative electrode 3 of each cylindrical battery 1 (each storage battery cell), each cylindrical battery Cooling of the cell connection part (namely, electrode part) of 1 (each storage battery cell) or a heat generation prevention measure is indispensable.

  However, in the conventional technology, since a large current flows through the cell connection portion (that is, electrode portion) of the positive electrode 2 and the negative electrode 3 of each cylindrical battery 1 (each storage battery cell), in order to prevent danger, The battery holding plate 5 having insulating properties is protected so as to prevent inadvertent human contact with the cell connection portion (that is, the electrode portion), and a cooling fan with a box as shown in FIG. 13, cooling air, that is, cooling air cannot be passed to the cell connection portion (that is, the electrode portion), and most of the exhaust heat from the cell connection portion (that is, the electrode portion) of the positive electrode 2 and the negative electrode 3 is lost. There was a problem that it was impossible.

  In addition, when a plurality of storage battery modules 20 are mounted on a power supply rack in a plurality of stages, even when an attempt is made to configure a storage battery system in which a plurality of storage battery modules are mounted, the exhaust heat from each storage battery module 20 is sufficient. In addition, there is a problem that the temperature of each storage battery module 20 varies and the life of each storage battery module 20 or each cylindrical battery 1 (each storage battery cell) is reduced.

  The present invention has been made in view of such circumstances, and reliably performs heat dissipation of each storage battery cell constituting the storage battery module regardless of whether or not the discharge current reaches 2.5C to 3C. It is an object of the present invention to provide a storage battery module and a storage battery system including a cooling mechanism that can be used.

  The present invention comprises the following technical means in order to solve the above-mentioned problems.

  The first technical means is a storage battery module having a structure in which a plurality of storage battery cells arranged in a plurality of rows and a plurality of stages are integrated in a state of being held and fixed by a battery holding plate, and the battery box Cooling air blown from the outside of the battery box is directly blown to each of the electrode portions of each of the plurality of storage battery cells, and heat exchange is performed with each of the electrode portions. A plurality of slits for discharging the cooling air after the discharge to the outside of the battery box are formed.

  According to a second technical means, in the storage battery module according to the first technical means, the plurality of slits formed in the battery box are accommodated in the battery box in each of the bottom plate and the ceiling plate. Further, it is formed at a plurality of positions arranged in a row in the vicinity of two opposing edges in a direction parallel to the arrangement direction of the battery gripping plate in which the electrode portions of the storage battery cells are in close contact. It is characterized by.

  A third technical means is the storage battery module according to the first or second technical means, wherein the slit formed in the bottom plate of the battery box is a cooling air for taking in the cooling air that is blown. The slit formed in the ceiling plate of the battery box is a cooling air discharge slit for discharging the cooling air heat exchanged with the electrode portions of the storage battery cells to the outside of the battery box. It is characterized by being.

  According to a fourth technical means, in the storage battery module according to any one of the first to third technical means, the side plate constituting the battery box is further provided with a cooling fan with a box, and the cooling fan with the box is attached. In order to take outside air into the battery box and to discharge the taken outside air from the battery box to the side plate and the side plate opposite to the side plate by driving the cooling fan with box, respectively. A plurality of vent holes are perforated.

  According to a fifth technical means, in the storage battery module according to any one of the first to fourth technical means, each of the storage battery cells is a cylindrical battery having a cylindrical shape.

  A sixth technical means is characterized in that, in the storage battery module according to any one of the first to fifth technical means, electrodes of the adjacent storage battery cells are connected in series.

  A seventh technical means is a storage battery system configured by stacking and mounting a plurality of storage battery modules each comprising a battery box containing a plurality of storage battery cells on a power supply rack, wherein the storage battery module is the first to sixth technical means. It comprises using the storage battery module in any one of.

  According to an eighth technical means, in the storage battery system according to the seventh technical means, cooling air from a cooling fan installed on the floor surface or under the floor on which the power supply rack is erected is stacked and mounted on the power supply rack. The power supply rack includes a cooling air pipe that can directly blow air to each of the battery boxes of the plurality of storage battery modules.

  A ninth technical means is characterized in that, in the storage battery system according to the eighth technical means, the cooling air pipe is configured using a material having heat insulation properties.

  According to the present invention, the following effects can be achieved.

  That is, the cooling air intake slit and the cooling air discharge that the cooling air directly hits the electrode portion of each storage battery cell on the bottom plate and the ceiling plate of the battery box that stores the storage battery modules composed of a plurality of storage battery cells arranged in multiple rows and multiple stages Since the slits are perforated, each storage battery cell can be directly cooled, and exhaust heat from each storage battery cell in the storage battery module can be obtained only by forced air cooling with a cooling fan with a box attached to the side plate of the battery box. Even under conditions where it cannot catch up, sufficient cooling can be performed, and exhaust heat from each storage battery cell can be reliably performed. Thus, a high rate discharge operation such as 2C, 3C (twice or three times the rated current capacity) can be performed.

  Furthermore, even when a battery rack of a plurality of storage battery modules mounted in multiple stages is configured as a storage battery system, cooling air from an externally installed cooling fan is supplied to each storage battery by a cooling air pipe. Since the structure directly blows air to the electrode part of each storage battery cell constituting the module, the temperature distribution of each storage battery module and each storage battery cell can be suppressed and the temperature distribution can be made uniform. It is possible to improve the service life of.

It is the schematic for demonstrating an example of the structure of the battery box which accommodates the storage battery module which concerns on this invention. It is a conceptual diagram which shows the structural example of the power supply rack which mounts multiple storage battery modules shown in FIG. 1 as the storage battery system which concerns on this invention. It is a schematic diagram which shows the mounting structure of the conventional storage battery module.

  Hereinafter, an example of a preferred embodiment of a storage battery module and a storage battery system according to the present invention will be described in detail with reference to the drawings.

(Features of the present invention)
Prior to the description of the embodiments of the present invention, an outline of the features of the present invention will be described first. The present invention provides a battery box for storing a storage battery module in order to effectively exhaust heat from each storage battery cell constituting a storage battery module (a package of a plurality of, for example, 10 storage battery cells). In addition to the cooling fan with a box attached to the side plate of the battery box, at each of the bottom plate and the ceiling plate of the battery box, the cooling air from the outside directly hits the electrode part of each storage battery cell in the battery box, By installing a cooling air intake slit for sucking the cooling air and a cooling air exhaust slit for exhausting the cooling air after heat exchange between the electrodes of each storage battery cell to the outside, it is installed outside the storage battery module. The cooling air blown from the cooling fan is configured to be able to exhaust heat while directly cooling the electrode part of each storage battery cell that is a high-temperature heating part. There.

  Further, in a storage battery system configured by stacking a plurality of storage battery modules on a power supply rack in multiple stages, each storage battery module stores cooling air from a cooling fan installed outside each storage battery module. It is also characterized in that a cooling air pipe for directly blowing air to the cooling air intake slit of each battery box is provided.

  That is, in the prior art, as explained in FIG. 3, the storage battery module has the electrode part of each storage battery cell in contact with the battery grip plate in order to grip and fix each storage battery cell. The large heat generation in the electrode parts (positive electrode and negative electrode), that is, the cell connection part, could not be released to the outside of the battery box, and could reach a very high temperature during discharge.

  However, in the present invention, even in the case of a storage battery module using a battery gripping plate as shown in FIG. 3A, the cooling air from the outside can be directly blown onto the electrode portions of each storage battery cell to exhaust heat. Possible slits are drilled in the bottom plate and ceiling plate of the battery box as cooling air intake slits and cooling air exhaust slits, and cooling air is directly applied to the electrode part of each battery cell from the cooling air intake slit of the battery box bottom plate. Since the structure which hits is employ | adopted, the heat of each storage battery cell which might become high temperature can be effectively exhausted, and it can cool.

(Configuration example of embodiment)
Next, an example of the configuration of a storage battery module according to the present invention and a storage battery system (power supply system) in which a plurality of the storage battery modules are mounted will be described in detail with reference to the drawings. First, the mounting form in the battery box of the storage battery module according to the present invention will be described with reference to FIG. FIG. 1 is a schematic diagram for explaining an example of the structure of a battery box that houses a storage battery module according to the present invention.

  In addition, as shown in FIG. 1, each storage battery cell which comprises the storage battery module 20 in this embodiment uses the cylindrical battery 1 which consists of a cylindrical shape similarly to the case of the conventional storage battery module 20 shown in FIG. However, the present invention is not limited to such a shape, and in order to grip and fix each storage battery cell constituting the storage battery module, the battery gripping plate may be brought into close contact with the electrode portion of each storage battery cell. A storage battery cell having any shape may be used as long as it has a possible structure. Moreover, the storage battery cell which comprises the storage battery module 20 is about the case where 10 cylindrical batteries 1 (storage battery cells) are arranged in 5 rows and 2 stages similarly to the case of the conventional storage battery module 20 shown in FIG. As will be described, the present invention is not limited to such a case, and is not limited to ten, but in the case where an arbitrary number (multiple) of storage battery cells are arranged at predetermined intervals in a plurality of rows and multiple stages. There may be.

  Next, the mounting structure shown in FIGS. 1A and 1B will be described. As shown in FIG. 1A, inside the storage battery module 20 in the present embodiment, each cylindrical battery 1 (each storage battery cell) constituting the storage battery module 20 is replaced with the case of the conventional storage battery module of FIG. Although it is gripped and fixed using the same battery gripping plate 5, the structure of the battery box 30 for storing the storage battery module 20 is the battery box 10 of FIG. 3B as shown in FIG. Unlike the suction port 35 on the side surface of the battery case 30, the outside air (air) for cooling is used as cooling air from the bottom plate of the battery case 30, that is, from the cooling air intake slit 36 on the battery case base 31 side. The structure can be taken into the box 30.

  First, as shown in FIG. 1 (A), inside the storage battery module 20 according to the present invention, as in the case of FIG. 3 (A), each cylindrical battery 1 (storage battery cell) having a cylindrical shape is mutually connected. Are arranged in five rows and two stages with a predetermined appropriate interval (for example, 5 mm) apart, and each cylindrical battery 1 (storage battery cell) is easily connected in series with each other. Cylindrical batteries 1 are arranged so that the positions of positive electrode 2 and negative electrode 3 are alternately changed so that adjacent positive electrode 2 and negative electrode 3 face the same surface, and positive electrode 2 and negative electrode of each adjacent cylindrical battery 1 are arranged. 3 is connected by a bus bar (battery connector) or a power line so that the insulating battery grip plate 5 is in close contact with the electrode portion of each cylindrical battery 1 as in the case of FIG. A structure for holding and fixing each cylindrical battery 1 and To have. It should be noted that the battery gripping plate 5 is placed on the portion of the battery gripping plate 5 that grips each cylindrical battery 1 in order to facilitate the attachment / detachment of each cylindrical battery 1 when the cylindrical battery 1 is replaced. A dividing surface 6 is formed for removing a part (upper and lower plates).

  Further, as shown in FIG. 1 (B), the battery gripping plate 5 for gripping each cylindrical battery 1 is placed on the battery box pedestal 31 as in FIG. 3 (B). The storage battery module 20 is accommodated in the battery case 30 by covering the outer case 32 of the battery case 30.

  Here, as in the case of FIG. 3B, the outer case 32 of the battery case 30 has two side plates that are in a positional relationship parallel to the center line of each of the 10 cylindrical batteries 1 connected in series. The air hole is formed as an opposed flat plate with a vent hole formed therein, and the air hole formed in the other opposed flat plate (the side plate on the inner side of the outer box 32 in FIG. 1B) absorbs air. A suction hole 35 for suction, and a vent hole formed in one opposing flat plate (a side plate on the front side of the outer box 32 in FIG. 1B) exchanges heat with each cylindrical battery 1. An exhaust port for exhausting air is formed.

  Of the ten cylindrical batteries 1 connected in series, the positive electrode 2 or negative electrode 3 of the first cylindrical battery 1 and the negative electrode 3 or positive electrode 2 of the last cylindrical battery 1 are shown in FIG. As described above, the output terminal of the electrical connector 34 attached to the other opposing flat plate of the outer case 32 of the battery case 30 (the side plate on the near side of the outer case 42 in FIG. 1B) is electrically connected to the output terminal by a bus bar or a power line. Connected.

  In addition, as shown in FIG. 1 (B), as shown in FIG. 1 (B), for the purpose of not causing temperature variation during charging / discharging of each cylindrical battery 1 and not exceeding the upper limit temperature, A cooling fan 33 with a box is attached to one opposing flat plate of the outer case 32 (a side plate on the front side of the outer case 32 in FIG. 1B), and the other opposite of the outer case 32 of the battery case. Ten cylinders housed in the battery box by sucking cooling air from the suction port 35 formed in the flat plate (in FIG. 1B, the side plate on the back side of the outer box 32). It is configured to forcibly cool the entire storage battery module 20 composed of the type battery 1.

  Here, in the battery box 30 shown in FIG. 1 in which the storage battery module 20 is housed, unlike the battery box 10 in the case of the conventional storage battery module in FIG. 3, the battery box 30 has a positional relationship parallel to the center line of each cylindrical battery 1. It is effective to generate heat from the electrodes of each cylindrical battery 1 of the storage battery module 20 that is difficult to exhaust by taking in outside air (air) by the cooling fan 33 with a box attached to the opposing flat plate of the side plate of a battery box 30. In order to allow the heat to be exhausted, the battery box pedestal 31 that forms the bottom plate of the battery box 30 and the ceiling plate of the outer box 32 that forms the ceiling plate of the battery box 30, respectively, The structure in which the slits are perforated is adopted.

  In addition, the position of the plurality of slits formed in the battery case 30 is such that the cooling air blown from the outside of the battery case 30 is blown directly to each electrode part of each of the plurality of cylindrical batteries 1 (each storage battery cell). And the cooling wind after heat-exchanged with each electrode part of each of the plurality of cylindrical batteries 1 (each storage battery cell) is a position where the cooling air is smoothly discharged to the outside of the battery box 30.

  In other words, the positions of the plurality of slits formed in the battery case 30 are the electrode portions of the cylindrical batteries 1 (each storage battery cell) housed in the battery case 30 in the bottom plate and the ceiling plate of the battery case 30, respectively. Are formed at a plurality of positions arranged in a row in the vicinity of two opposing edges in a direction parallel to the arrangement direction of the battery gripping plate 5 in close contact with each other.

  Here, the plurality of slits are formed in each cylindrical battery 1 in each of the bottom plate and the ceiling plate of the battery box 30 so that each electrode part of each cylindrical battery 1 (each storage battery cell) can be efficiently cooled. It is desirable that at least the position where the distance from the electrode part of each storage battery cell is the shortest is included.

  In addition, a cooling fan that sends cooling air to the slit is installed outside the battery box 30 at any appropriate location located on the bottom plate side of the battery box 30, and cooling air from the cooling fan is installed. Is configured to blow air from the bottom plate side of the battery box 30 toward the inside of the battery box 30. That is, the slit formed in the battery box base 31 of the battery box 30 becomes the cooling air intake slit 36 for taking in the cooling air from the cooling fan, and the slit formed in the ceiling plate of the battery box 30 is each cylindrical type. Cooling air exhaust slits 37 are provided for discharging the cooling air heat exchanged with the electrode portions of the battery 1 and exhausting the heat of the electrode portions of each cylindrical battery 1.

  Here, the position of the cooling air intake slit 36 formed in the battery box pedestal 31 and the position of the cooling air discharge slit 37 formed in the ceiling plate of the battery box 30 are respectively from the cooling fans provided outside, as described above. Of cooling air (that is, a flow of outside air for forcibly cooling the electrode portion of each cylindrical battery 1), and a position where the cooling air can be directly applied to the electrode portion of each cylindrical battery 1, and The cooling air hitting the electrode portion of each cylindrical battery 1 is set at a position where the ventilation resistance can be reduced and the air can be smoothly guided to the outside of the battery box 30 without generating turbulence.

  In other words, the positions of the cooling air intake slit 36 drilled in the battery box base 31 of the battery box 30 and the cooling air discharge slit 37 drilled in the ceiling plate of the battery box 30 are the maximum of the storage battery module 20 as described above. Each cylindrical battery 1 (storage battery cell) is arranged in a position where it can be smoothly discharged by direct contact with the cooling air on the electrode part of each cylindrical battery 1 (storage battery cell) serving as a heat generating part. It is possible to effectively air-cool the electrode portion.

  Further, an appropriate gap having a predetermined width for allowing the cooling air to pass therethrough is provided between the current collecting tab portion constituting the electrode portion of each cylindrical battery 1 and the bus bar portion which is a battery connector. In addition, the high heat generation part of the electrode part of each cylindrical battery 1 can be directly cooled, and the cooling air exchanged with the electrode part of each cylindrical battery 1 can be cooled more smoothly. The structure allows the air to pass toward the wind discharge slit 37.

  By adopting the cooling structure of the battery case 30 like this, the horizontal direction (battery) using the boxed cooling fan 33 shown in FIG. 1 (B) similar to the case of the conventional battery case 10 of FIG. 3 (B). Cooling of the exterior portion (side surface portion) of each cylindrical battery 1 (each storage battery cell) by cooling air on the bottom plate of the box 30, that is, the direction parallel to the battery box pedestal 31, and cooling installed outside the bottom plate side of the battery box 30 By cooling the electrode part of each cylindrical battery 1 (each storage battery cell) with cooling air in the vertical direction (direction perpendicular to the bottom plate of the battery box 30, that is, the battery box base 31) using a fan, the storage battery module 20 is The entire inside of the stored battery box 30 can be effectively cooled.

  That is, in the battery box 30 shown in FIG. 1B, a position parallel to the center line of each cylindrical battery 1, which is the same cooling mechanism as the cooling method of the conventional storage battery module 20 shown in FIG. By driving a cooling fan 33 with a box attached to a side plate (opposite flat plate) of the battery box 30 having a relationship, from the suction port 35 of the opposite side plate (opposite flat plate) opposite to the side plate (opposite flat plate). While making it possible to minimize disturbance to the flow of air (outside air) in the cooling mechanism that exhausts heat from the battery case 30 by the air (outside air) taken into the inside of the battery case 30, the main features of the present invention are further improved. The battery box pedestal 31 that is in the same direction as the direction in which the electrode parts of the cylindrical batteries 1 are arranged so as to effectively cool the electrode parts of the cylindrical batteries 1 that are the high heat generation parts. Both end portions (bottom plate of battery box 30) Each cylindrical type at a position close to each of the two facing edges) and both ends of the ceiling plate of the outer box 32 (the ceiling plate of the battery box 30) (positions close to each of the two facing edges). A cooling air intake slit 36 and a cooling air discharge slit 37 for taking in cooling air for directly cooling the electrode portion of the battery 1 are formed.

  Thus, the heat of all parts including the exterior part (side face part) and the electrode part of each cylindrical battery 1 (storage battery cell) constituting the storage battery module 20 can be efficiently exhausted to the outside of the battery box 30. It is possible to cool the entire battery box 30 effectively.

  Next, an example of a cooling mechanism for a power supply rack in which a plurality of storage battery modules 20 shown in FIG. FIG. 2 is a conceptual diagram showing a configuration example of a power supply rack (storage battery module rack) on which a plurality of the storage battery modules 30 shown in FIG. 1 are mounted as the storage battery system according to the present invention, and the battery as shown in FIG. An example of the cooling mechanism of the entire storage battery system when the storage battery modules 20 housed in the box 30 are stacked and mounted over a plurality of stages is shown.

  As shown in FIG. 2, the power supply rack 50 in which a plurality of storage battery modules 20 are stacked and mounted is erected on the floor surface of the double underfloor structure, and each storage battery module 20 is cooled under the floor. A cooling fan 51 that blows cooling air through a cooling air pipe 52 is provided.

  In the mounting structure in which a plurality of battery boxes 30 in which the storage battery modules 20 are housed are stacked and mounted on the power supply rack 50, when the cooling air pipe 52 is not used, the closest structure to the cooling fan 51 disposed under the floor. The storage battery module 20 housed in the lowermost battery box 30 is best air-cooled by the cooling air blown from the cooling fan 51, whereas the cooling from the cooling fan 51 is advanced as the power supply rack 50 is moved upward. In addition to the weak wind power, the exhaust air from the battery box 30 mounted on the lower side of the power supply rack 50 is absorbed and the temperature of the cooling wind rises. The cooling effect of the storage battery module 20 housed in the battery box 30 is relatively lowered.

  In order to prevent such a situation, as shown in FIG. 2, a cooling air pipe 52 capable of directly sending cooling air from the cooling fan 51 installed under the floor to the battery box 30 of each stage is provided in the power supply rack 50. It is installed, and the cooling air from the cooling fan 51 is blown directly to the battery boxes 30 at each stage via the cooling air pipe 52.

  As a result, it becomes possible to directly send the cooling air from the cooling fan 51 to the cooling air intake slit 36 of the battery case 30 mounted on the upper side of the power supply rack 50, thereby reducing the wind force of the cooling air. Since it is possible to suppress the influence of exhaust heat from the battery box 30 mounted on the lower stage side of the power supply rack 50, the storage battery module of the battery box 30 mounted on the upper stage side of the power supply rack 50 can be suppressed. 20 can be effectively air-cooled.

  Note that the cooling air pipe 52 that blows the cooling air from the cooling fan 51 to the battery boxes 30 of each stage is configured to block the influence of the exhaust heat from the battery boxes 30 mounted on the lower stage side of the power supply rack 50. It is desirable to use a heat insulating material that can block heat from the outside, that is, a heat insulating material.

  Further, by circulating the cooling air from the air conditioner 40 installed on the floor surface of the double underfloor structure also under the floor, the air under the floor is cooled and the cooling fan 51 disposed under the floor is cooled. The cooling air may be further cooled.

  In addition, the cooling air pipe 52 may be capped at locations where it is not necessary to blow the cooling air so that the cooling air can be efficiently cooled. good.

  In the case of an installation environment in which a double underfloor structure cannot be used, the cooling fan 51 is arranged on the same floor surface as the power supply rack 50. The cooling air from the cooling fan 51 installed on the surface is directly blown by the cooling air pipe 52 to the battery boxes 30 of the storage battery modules 20 at each stage, so that efficient cooling can be performed as described above. There is no change in what can be done.

  As described above, a cooling mechanism that directly cools the plurality of storage battery modules 20 constituting the storage battery system with cooling air from the floor surface or under the floor where the power supply rack 50 is erected is incorporated using the cooling air pipe 52. Thus, even in a mounting structure in which a plurality of storage battery modules 20 are stacked and mounted on the power supply rack 50 as a storage battery system, cooling using only the boxed cooling fan 33 attached to the side plate of each battery box 30 as in the prior art. Compared with the mechanism, each cylindrical battery 1 (each storage battery cell) and each storage battery module 20 constituting the power supply rack 50 can be cooled more efficiently, and each cylindrical battery 1 (each storage battery) Cell) and between the storage battery modules 20, the temperature of the entire power supply rack 50 can be made uniform. 1 can be improved (the battery cells) and life of each battery module 20.

  Further, in the storage battery system of the present embodiment, as described above, the bottom plate and the ceiling plate of the battery box 30 in which each storage battery module 20 is accommodated by the cooling air by the cooling fan 51 installed outside by the cooling air pipe 52. The cooling mechanism using only the cooling fan 33 with a box attached to the side plate of the battery box 30 as in the prior art can be directly blown into the slits (cooling air intake slit 36 and cooling air discharge slit 37) drilled in Cooling efficiency exceeding can be obtained. Therefore, since the blowing power of the cooling fan 33 with a box attached to the side plate of the battery box 30 can be reduced, the limitation on the depth of the power supply rack, which has been a problem in the conventional power supply rack (storage battery module rack), can be relaxed. It is possible to improve the degree of freedom in designing the power supply rack.

DESCRIPTION OF SYMBOLS 1 ... Cylindrical battery, 2 ... Positive electrode, 3 ... Negative electrode, 4 ... Exothermic part, 5 ... Battery holding plate, 6 ... Dividing surface, 10 ... Battery box, 11 ... Battery box base, 12 ... Outer box, 13 ... With box Cooling fan, 14 ... electric connector, 15 ... suction port, 20 ... storage battery module, 30 ... battery box, 31 ... battery box base, 32 ... outer box, 33 ... cooling fan with box, 34 ... electric connector, 35 ... suction port 36 ... Cooling air intake slit, 37 ... Cooling air discharge slit, 50 ... Power supply rack, 51 ... Cooling fan, 52 ... Cooling air pipe.

Claims (9)

  A storage battery module having a structure in which a plurality of storage battery cells arranged in a plurality of rows and a plurality of stages are integrated in a state of being held and fixed by a battery holding plate, and is stored in a battery box, and a bottom plate and a ceiling plate constituting the battery box The cooling air blown from the outside of the battery box is directly blown to each of the electrode parts of each of the plurality of storage battery cells, and the cooling air after heat exchange with each of the electrode parts is A storage battery module, wherein a plurality of slits discharged to the outside of the battery box are formed.   2. The storage battery module according to claim 1, wherein the plurality of slits formed in the battery box are in close contact with electrode portions of the storage battery cells housed in the battery box in each of the bottom plate and the ceiling plate. A storage battery module, wherein the storage battery module is formed at a plurality of positions arranged in a row adjacent to each of two opposing edges in a direction parallel to the arrangement direction of the battery gripping plate.   The storage battery module according to claim 1 or 2, wherein the slit formed in the bottom plate of the battery box is a cooling air intake slit for taking in the cooling air that is blown, and the ceiling of the battery box. The storage battery module, wherein the slit formed in the plate is a cooling air discharge slit for discharging the cooling air heat-exchanged with the electrode portion of each storage battery cell to the outside of the battery box.   The storage battery module according to any one of claims 1 to 3, further comprising a cooling fan with a box on the side plate constituting the battery box, the side plate on which the cooling fan with the box is attached, and the opposite side opposite to the side plate. Each side plate is provided with a plurality of ventilation holes for taking outside air into the battery box and discharging the taken outside air from the battery box by driving the cooling fan with box. A storage battery module characterized by that.   5. The storage battery module according to claim 1, wherein each of the storage battery cells is a cylindrical battery having a cylindrical shape. 6.   The storage battery module according to any one of claims 1 to 5, wherein electrodes of the adjacent storage battery cells are connected in series.   A storage battery system configured by stacking and mounting a plurality of storage battery modules, each of which includes a battery box containing a plurality of storage battery cells, on a power supply rack, using the storage battery module according to any one of claims 1 to 6. A storage battery system characterized by comprising.   The storage battery system according to claim 7, wherein the batteries of the plurality of storage battery modules are mounted by stacking cooling air from a cooling fan installed on the floor surface or under the floor where the power supply rack is erected on the power supply rack. A storage battery system, wherein the power supply rack is provided with a cooling air pipe capable of directly blowing air to each box.   The storage battery system according to claim 8, wherein the cooling air pipe is configured using a heat insulating material.

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