JP6354514B2 - Power storage device module - Google Patents

Description

  The present invention relates to a power storage device module in which a plurality of power storage devices are integrated.

In recent years, the use of power storage devices has expanded as a power source for vehicles and electronic devices. From the viewpoint of securing a large current or a high capacity, development of a power storage device module in which a plurality of power storage devices are integrated as a group is also in progress.
Hereinafter, an in-vehicle use will be described as an example. A power storage device module for in-vehicle use needs to be mounted in a limited space such as a lower part of a vehicle interior seat. Therefore, downsizing of the electricity storage device module is important.

  On the other hand, as the performance of power storage devices increases, the charge / discharge current of power storage devices tends to increase. When the storage device is charged / discharged with a large current, the heat generated by charging / discharging also increases. If the temperature of the electricity storage device exceeds the appropriate temperature, it will cause deterioration of the electricity storage device and thermal runaway, and safety will be impaired. Therefore, it is important to perform temperature management of the electricity storage device from the viewpoint of safely using the electricity storage device for a long period of time.

  In order to manage the temperature of the power storage device, it is necessary to detect the temperature of the power storage device using a temperature detection sensor and monitor the temperature change. Therefore, the accuracy of temperature detection greatly affects the performance and safety of the electricity storage device. With the increase in charge / discharge current, the importance of increasing the accuracy of temperature detection of each power storage device is increasing. From the viewpoint of increasing the accuracy of temperature detection, it is most desirable to bring a temperature detection sensor into contact with the wall surface of each power storage device constituting the group (Patent Documents 1 and 2).

JP 2001-91363 A JP 2006-250734 A

  However, it is difficult to place the temperature detection sensor in contact with the wall surface of each power storage device.

  In view of the above, an object of the present invention is to quickly and accurately detect an abnormal temperature by installing a temperature detection sensor in the vicinity of an electricity storage device and an attached circuit in which a temperature rise is likely to be remarkable.

  One aspect of the present invention includes a group including two or more power storage devices each having an external terminal, and a circuit for controlling charge / discharge of the power storage device, and is arranged along at least a part of the group. And a temperature detection sensor for detecting the temperature of the group, wherein a space is held between the group and the substrate, and the temperature detection sensor is disposed in the space. Regarding modules.

  According to the above aspect of the present invention, the abnormal temperature of the electricity storage device can be detected quickly and accurately.

It is a perspective view which shows an example of the group of the electrical storage device integrated with the holder. It is a perspective view which shows the group of the electrical storage device of a state which removed the holder. It is a perspective view which shows the group of the electrical storage device integrated with the holder, and the exterior case which accommodates this. It is a perspective view which shows the group of the electrical storage device integrated with the holder, and accommodated in the exterior case, and a restraint plate. It is a perspective view which shows the connection relation of a joining member and an electrical storage device. It is the elements on larger scale of FIG. 5 which show the connection relation of a temperature detection sensor and a joining member. It is a perspective view which shows the relationship between the group of the electrical storage device accommodated in the exterior case, and a cover plate. It is a perspective view which shows the relationship between the group of the electrical storage device accommodated in the exterior case, and a circuit board. It is a perspective view which shows the electrical storage device module which comprises a circuit board. FIG. 9B is a cross-sectional view taken along the line B-B in FIG. 9A, showing a connection relationship between the external terminal, the input / output terminal, and the circuit board of the electricity storage device. It is sectional drawing which shows the connection relationship between the external terminal of another electrical storage device, the input / output terminal which comprises a temperature detection sensor, and a circuit board. It is a perspective view of the joining member (bus bar) which has the temperature detection area | region which fixes a temperature detection sensor. It is a perspective view of the input / output terminal which comprises a temperature detection sensor. It is a perspective view of a 1st case. It is the side view which looked at the 1st case from the X direction. It is the top view which looked at the 1st case from the Z direction. It is the rear view which looked at the 1st case from the opposite of the Z direction. It is the side view which looked at the 1st case from the opposite of the Y direction. It is a perspective view of a 2nd case. It is the side view which looked at the 2nd case from the X direction. It is the top view which looked at the 2nd case from the Z direction. It is the side view which looked at the 2nd case from the Y direction. It is an enlarged view of the area | region enclosed with the dashed-dotted line of FIG. 13B.

[Description of Embodiment of the Invention]
First, the contents of the embodiments of the invention will be listed and described.

  (1) The power storage device module according to the present embodiment includes a group (hereinafter referred to as a device group) including two or more power storage devices each having an external terminal, and a circuit for controlling charge / discharge of the power storage device. A substrate (hereinafter referred to as a circuit board) arranged along at least a part of the group and a temperature detection sensor for detecting the temperature of the device group. A space (hereinafter referred to as a temperature detection space) is held between the device group and the circuit board, and a temperature detection sensor is arranged in the space.

  In the case of a miniaturized power storage device module, the temperature increase of the power storage device due to heat generation of the power storage device and an attached circuit (particularly, a circuit portion having a switch function for controlling power input / output to / from the power storage device) tends to be significant. In the above-described configuration, the circuit board is disposed close to at least a part of the device group, and the temperature detection space is thermally adjacent to both the device group and the circuit board. Therefore, according to the temperature detection sensor in the temperature measurement space, the temperature change of the device group can be detected quickly and accurately. Further, there is no need to bring the temperature detection sensor into contact with the wall surface of the electricity storage device, and the degree of freedom of sensor attachment is great. That is, according to the above aspect of the present invention, there is provided a power storage device module that has less structural restrictions on the mounting of the temperature detection sensor and can easily manage the temperature of the power storage device while meeting demands for downsizing and large current. can do. Furthermore, since the circuit board is arranged close to the device group, the power storage device module can be easily downsized.

(2) The power storage device module may further include a joining member that connects external terminals of adjacent power storage devices. That is, two or more power storage devices are electrically connected in series and / or in parallel by the joining member. For example, a metal plate (busbar) is used as the joining member. When the joining member is arranged in the temperature measurement space, the temperature detection sensor preferably detects the temperature of the device group via the joining member. Thereby, installation of a temperature detection sensor becomes easy. At this time, the temperature detection sensor detects the temperature change of the device group indirectly by detecting the temperature of the bonding member. The bonding member arranged in the temperature measurement space sensitively reflects the temperature change of the device group, so it is possible to detect the temperature of the device group more quickly and accurately without installing a temperature detection sensor in each power storage device. it can.

(3) The power storage device module may further include a pair of input / output terminals for inputting / outputting electric power to / from the group, and the pair of input / output terminals connects the group and the substrate. May be. The circuit board includes, for example, a circuit having a switch function for controlling power input / output to / from the device group. Specifically, the input / output terminal is connected to an external terminal of the electricity storage device and a circuit having a switch function. The input / output terminals are preferably arranged in a temperature measuring space between the device group and the circuit board from the viewpoint of shortening the conduction path. When the input / output terminal is arranged in the temperature detection space, the temperature detection sensor may detect the temperature of the device group via at least one of the pair of input / output terminals. At this time, the temperature detection sensor detects the temperature change of the device group indirectly by detecting the temperature of the input / output terminal. The input / output terminals arranged in the temperature measuring space reflect the temperature change of the device group sensitively and are also members that are likely to become the highest temperature during normal module use. Therefore, by detecting the temperature of the device group through the input / output terminal, the abnormal temperature of the device group can be detected more quickly. Therefore, the safety at the time of module use is improved.
In addition, as long as a temperature detection sensor is arrange | positioned in temperature measurement space, the number and installation location of a temperature detection sensor are not specifically limited.

(4) The power storage device module may further include an insulating holder that integrates two or more power storage devices. Here, the holder includes a first case that engages with one end (hereinafter referred to as a first end) of the device group, and the other end (hereinafter referred to as a second end) that faces the first end of the device group. And a second case to be fitted. It is preferable that the first case includes an inner housing portion that engages with the first end portion of the device group, and an outer housing portion that is disposed on the opposite side of the inner housing portion. At this time, the circuit board is preferably arranged so as to cover the outer housing portion. Moreover, it is preferable that an outer side accommodating part accommodates an external terminal and / or an input / output terminal, a temperature detection sensor, and a joining member. That is, the temperature measurement space is held by the outer housing portion. As a result, the distance between the external terminal of the device group and the circuit board is reduced, and the connection structure between the input / output terminal and the circuit board can be easily and easily reduced in resistance. Further, the power storage device module has a shape that is easy to handle as a whole, and the mechanical or structural strength is improved. Furthermore, the presence of the holder improves the safety of work for connecting the electricity storage devices to each other with a joining member. Since a plurality of power storage devices can be integrated with a holder made of two parts, assembly is also easy.

(5) In a preferred embodiment, the power storage device includes a power generation element or a power storage element, and a square case that houses the power generation element or the power storage element. That is, the electricity storage device is preferably a square device. The square case generally includes a square metal container and a sealing plate that closes the opening of the metal container. Usually, two external terminals are provided on the sealing plate. In this case, the sealing plates of the two or more power storage devices are arranged in alignment with the first end. Although the shape of an external terminal is not specifically limited, For example, it is preferable that it is a protrusion shape. Thereby, it becomes easy to connect the external terminals of the electrical storage device adjacent by a joining member.

  In the case where the sealing plate has two external terminals having different polarities, a plurality of power storage devices can be connected in parallel by connecting the external terminals having the same polarity. Further, a plurality of power storage devices can be connected in series by connecting external terminals of different polarities of adjacent power storage devices.

  The sealing plate may have a gas vent valve that operates when the internal pressure of the electricity storage device increases. At this time, it is preferable that the first case has a lid portion facing the gas vent valve with a predetermined interval. Thereby, a sufficient gas passage is secured. Moreover, the circuit board arrange | positioned so that an outer side accommodating part may be covered can be protected from gas.

  By arranging the rectangular electricity storage device as described above, the structural strength of the electricity storage device module is further increased. However, the shape of the electricity storage device is not limited to a square shape, and may be a cylindrical shape and / or a laminate shape, or may be other shapes. In addition, power storage devices having different shapes may be integrated into a module.

(6) The first case preferably includes a first partition member interposed between adjacent power storage devices, and similarly, the second case preferably includes a second partition member interposed between adjacent power storage devices. Thus, the plurality of power storage devices are reliably positioned in the holder and fixed in that state. The power storage device module is easier to assemble and has high structural strength. Further, since the structure is simple, it is easy to reduce the size and weight of the module.

  A space is maintained between adjacent power storage devices by the first partition member and the second partition member. Thereby, the space where air convects between the electricity storage devices can be maintained. Accordingly, excellent heat dissipation can be obtained, and at the same time, the temperature of the temperature measurement space between the device group and the circuit board can easily reflect the temperature of the side surface of the device group. Further, there is no problem that the power storage devices come into contact with each other and are rubbed by impact and / or vibration. Therefore, damage to the electricity storage device can be prevented.

  Since the holders (the first case and the second case) have insulating properties, the outer surfaces of one end and the other end of the metal container disposed at the first end and the second end are the first case and You may contact the 2nd case directly. Thereby, it becomes unnecessary to cover an electrical storage device with an insulating exterior sheet, and manufacturing cost can be suppressed.

  By connecting the first case and the second case, the first case and the second case may sandwich the device group from the first end and the second end. Thereby, the structural strength of the electricity storage device module is further increased.

  The outer housing part preferably has a third partition member that electrically insulates the external terminals that are not connected by the joining member among the external terminals of the adjacent power storage devices. Thereby, when joining required external terminals with a joining member, an unnecessary electrical miscontact can be avoided. The third partition member contributes to the improvement of the structural strength.

  The outer housing portion preferably has a rib disposed so as to surround the external terminal and the joining member. Thereby, the electricity storage device has a shape that is easier to handle as a whole, and the structural strength is further improved. At this time, the end surface of the rib and the end surface of the third partition member are preferably flush with each other. This further improves the structural strength. From the same viewpoint, it is preferable that the lid portion facing the gas vent valve is also flush with the end surface of the rib and the end surface of the third partition member.

(7) Although the kind of electrical storage device which comprises the said electrical storage device module is not specifically limited, A battery and / or a capacitor (or capacitor) are mentioned. Although the kind of battery is not specifically limited, Chemical batteries, such as a nonaqueous electrolyte battery, a lead acid battery, and a nickel metal hydride storage battery, are mentioned. The type of the capacitor (or capacitor) is not particularly limited, and examples thereof include an electric double layer capacitor, a lithium ion capacitor, and a redox capacitor.

[Details of the embodiment of the invention]
Embodiments of the present invention will be specifically described below. In addition, this invention is not limited to the following content, but is shown by the claim, and it is intended that all the changes within the meaning and range equivalent to a claim are included.

  As shown in FIG. 1, the plurality of power storage devices 100 are integrated by an insulating holder to form a device group. FIG. 2 shows a state in which the holders (first case and second case) are removed from the plurality of power storage devices. The holder includes a first case 200 that engages with the upper end portion 100a of the device group, and a second case 300 that engages with the lower end portion 100b of the device group. Note that the use of a holder is not essential, but the use of the holder increases the structural strength of the device group and facilitates handling.

  FIG. 3 shows a case where the group of power storage devices 100 is accommodated in a more sturdy outer case 500. FIG. 4 shows a case where the side surface of the electricity storage device accommodated in the outer case 500 is further fixed by the restraining plate 550. Although it is not essential to use the outer case 500 and the restraining plate 550, for example, when the power storage device module is mounted on a vehicle, it is desirable to use the outer case 500 and the restraining plate 550 having such high strength.

  As shown in FIG. 2, the electricity storage device 100 includes a power generation element or an electricity storage element and a square case that houses the element. The square case includes a bottomed square metal container 101 having an upper opening and a sealing plate 103 that closes the upper opening. The opening shape of the metal container 101 is an elongated rectangle or a shape similar to this. The metal container 101 is made of, for example, aluminum or an aluminum alloy. The sealing plates 103 of the plurality of power storage devices 100 are arranged in alignment with the upper end portion 100a of the device group.

  A first external terminal 105 penetrating the sealing plate is provided near one side of the sealing plate 103, and a second external terminal 107 penetrating the sealing plate is provided near the other side of the sealing plate. The first external terminal 105 and the second external terminal 107 have opposite polarities, and both have a protrusion shape or a column shape. The first external terminal 105 and the second external terminal 107 are arranged in a symmetrical shape at symmetrical positions of the electricity storage device 100. In the center of the sealing plate 103, a gas vent valve 109 is provided for releasing the gas generated inside when the internal pressure of the electricity storage device 100 rises.

  5 and 6 show a connection relationship between the joining member 400 and the external terminals of the electricity storage device 100. FIG. In the holder, a plurality of power storage devices 100 are accommodated so that the first external terminals 105 and the second external terminals 107 are alternately adjacent to each other. Therefore, when all of the electricity storage devices 100 are electrically connected in series, a plurality of bus bars 401 (if the number of electricity storage devices is n, (n-1) bus bars) are used to be closest to each other. Polar external terminals are alternately connected on the first external terminal side and the second external terminal side.

  In the illustrated example, the external terminal 105 (107) is a male screw, and the bus bars 401 and 401X are fixed by the nut 403. The joining member 400 includes bus bars 401 and 401X and a nut 403. The bus bars 401 and 401 </ b> X are plate-like conductive materials and have two terminal holes that allow the external terminals of the electricity storage device 100 to pass therethrough.

  The bus bar 401X is provided with a screw hole 401b for fixing the temperature detection electric sensor 402. While it is difficult to fix the temperature detection sensor 402 to the wall surface of the electricity storage device 100, it is easy to fix the temperature detection sensor 402 to the bus bar 401X. When a plurality of bus bars are used, all the bus bars are electrically and thermally connected to the device group in the temperature measurement space. Therefore, the temperature between the bus bars is not greatly different, and it is not necessary to install temperature detection sensors in all the bus bars. It is sufficient to install the temperature detection sensor 402 on at least one bus bar (in the illustrated example, the bus bar 401X).

  The bus bars 401 and 401X are preferably formed of a metal material that is excellent in electrical conductivity and thermal conductivity. For example, the bus bar is preferably formed using copper, a copper alloy, aluminum, an aluminum alloy, or the like. This makes it easier to detect the temperature of the device group quickly and accurately.

  The kind of temperature detection sensor is not specifically limited. For example, a resistor (thermistor), a Peltier element, or the like whose electric resistance greatly changes with temperature change can be used as the temperature detection sensor. A temperature detection sensor 402 shown in FIG. 6 is a thermistor, and the temperature detection sensor 402 is provided with a screw hole 402a through which a screw 402b is passed.

  FIG. 10 is a perspective view of the bus bar 401X to which the temperature detection sensor 402 is connected. The bus bar 401X has a screw hole 401b for fixing the temperature detection sensor 402 in addition to the two terminal holes 401a. Although the screw hole 401b may be provided between the two terminal holes 401a of the bus bar 401X, it is desirable to provide the screw hole 401b at a position outside the electric conduction path between the two terminal holes 401a. The bus bar 401X in the illustrated example has a rectangular electric conduction region 401A having two terminal holes 401a and a rectangular temperature measurement region 401B adjacent thereto, and a screw hole 401b is provided in the temperature measurement region 401B. A protrusion 401c that suppresses the rotation of the temperature detection sensor 402 when the temperature detection sensor 402 is fixed with a screw may be provided in the temperature detection region 401b.

  The temperature detection sensor 402 is attached to the bus bar 401X by aligning the screw hole 402a of the temperature detection sensor 402 and the screw hole 401b of the temperature detection region 401B so as to be coaxial, and inserting the screw 402b into both screw holes and fastening. Is done. Thereby, the temperature detection sensor 402 can be firmly fixed to the bus bar 401X. Therefore, it is possible to prevent the temperature detection sensor 402 from being detached from the bus bar 401X due to vibration.

  The temperature detection sensor is not limited to the bus bar 401X as described above, and may be fixed to any of the joining members 400. For example, the temperature detection sensor may be connected to another bus bar 401, nut 403, or washer. The joining member 400 (in particular, the bus bars 401 and 401X and the nut 403) may be plated from the viewpoint of reducing contact electric resistance and preventing corrosion. Thereby, the connection of the electrical storage devices by the joining member 400 can be stabilized.

  One first external terminal 105X and the other second external terminal 107Y of the two power storage devices 100 arranged on the outermost side of the device group are connected to a special connection component that functions as an input / output terminal 405 of the power storage device module. The

  FIG. 7 shows the relationship between the power storage device module housed in the exterior case 500 and the cover plate 570. The cover plate 570 prevents a short circuit between external terminals due to an external factor, and ensures insulation between the external terminals more reliably. However, it is not essential to use the cover plate 570 as long as the insulation between the external terminals is ensured.

  As illustrated in FIG. 8, a circuit board 600 including a control circuit that controls charging / discharging of the electricity storage device 100 can be disposed on the cover plate 570 of the electricity storage device housed in the outer case 500. That is, the circuit board 600 is arranged along the surface on the sealing plate side of the rectangular device group. As a result, a temperature measurement space 580 (see FIGS. 9B and 9C) that is thermally adjacent to both the device group and the circuit board 600 is formed. The distance between the lowermost surface of the circuit board 600 and the uppermost surface of the sealing plate 103 of the electricity storage device 100 (that is, the thickness of the temperature measurement space 580) is, for example, 5 to 25 mm. Thereby, it is possible to prevent heat from being excessively heated in the temperature measurement space 580 while ensuring the accuracy of temperature detection. Therefore, the heat dissipation of the electricity storage device module is improved.

  FIG. 9A illustrates an appearance of an example of an electricity storage device module 700 including the circuit board 600. FIG. 9B shows a connection structure between the external terminal 107 </ b> Y of the electricity storage device 100 and the circuit board 600 via the input / output terminal 405. 9B is a BB line arrow view of FIG. 9A.

  The external terminal 105X or 107Y of the electricity storage device 100 and the circuit board 600 are connected via the input / output terminal 405. Since the input / output terminal 405 is sensitive to a temperature change of the device group and easily reaches the highest temperature, the temperature of the device group may be detected via the input / output terminal 405. FIG. 9C is a modification of the embodiment of FIG. 9B, and the temperature detection sensor 402 is fixed to the input / output terminal 405. In the embodiment of FIG. 9C, it is not necessary to fix the temperature detection sensor to the bus bars 401, 401X or the like.

  As shown in FIG. 11, the input / output terminal 405 has a hole 405a through which the external terminal 105X (107Y) passes, a plate-like portion 405b to be crimped with a nut 403, and a plate-like portion spaced from the hole 405a. And a columnar portion 405c extending upward from 405b. A hollow portion 405d may be provided near the tip of the columnar portion 405c, and a screw groove may be formed on the inner wall of the hollow portion 405d so that the columnar portion 405c is a female screw. In addition, although the temperature detection sensor 402 is being fixed to the input / output terminal 405 illustrated in FIG. 11 (refer FIG. 9C), when the temperature detection sensor is being fixed to the bus bars 401, 401X, etc., the input / output terminal It is not necessary to fix the temperature detection sensor 402 to 405.

The columnar portion 405 c of the input / output terminal 405 has a height that reaches the circuit board 600 through the through hole 571 provided in the cover plate 570. A guide component 575 that insulates the cover plate 570 and the columnar portion 405 c may be interposed in the through hole 571. The tip of the columnar portion 405c is, for example, a flat surface. The flat surface at the tip of the columnar portion 405 c can be brought into contact with the terminal electrode 601 exposed on the lower surface of the circuit board 600. In this state, by engaging the male screw 590 with the female screw of the columnar portion 405c, the flat surface at the tip of the columnar portion 405c and the terminal electrode 601 of the circuit board 600 are firmly in surface contact, and electrical connection is achieved. The The contact area between the tip of the columnar portion 405c and the terminal electrode 601 is desirably 20 mm ² or more. Thereby, the connection resistance between the input / output terminal 405 and the circuit board 600 is lowered, which is advantageous for charging / discharging by a large current.

Next, an example of a holder for fixing the device group will be described.
12A to 12E show the appearance of the first case 200 viewed from each direction. FIG. 13A to FIG. 13D show the appearance of the second case 300 viewed from each direction, and FIG. 13E is an enlarged view of a region surrounded by a one-dot chain line in FIG. 13B. The first case and the second case each have plate-like partition members 201 and 301 that are interposed between adjacent power storage devices 100 (see FIG. 2). Thereby, in each case, a partition structure that fits into an upper end portion or a lower end portion of each power storage device 100 is formed, and a space 102 is held between adjacent power storage devices 100. Thereby, the outstanding heat dissipation is ensured.

  The arrangement of the electricity storage devices 100 is regulated by a partition structure. Therefore, by inserting each power storage device 100 from the lower end 100b in the second case 300 according to the partition structure, the plurality of power storage devices 100 are accommodated in the second case 300 in an aligned state (FIG. 2). reference). Thereafter, the device group is fixed by the partition structure of the first case 200 by fitting the first case 200 to the upper end portion 100 a of the device group accommodated in the second case 300. Therefore, the space 102 between the adjacent power storage devices 100 is stably maintained. That is, a plurality of power storage devices can be integrated with a simple operation, and the resulting structure is excellent in stability.

  Since the space is constantly maintained between the adjacent power storage devices 100, the power storage devices 100 are also prevented from contacting each other due to vibration and / or impact. Therefore, electrical insulation between the power storage devices can be reliably ensured, and damage due to friction of the power storage devices can be prevented.

  The first case 200 and the second case 300 are preferably resin parts each having an insulating property and excellent in lightness. The first case 200 and the second case 300 are preferably molded articles of polyolefin and / or a resin composition containing the same, for example. As the polyolefin, polypropylene (PP) having excellent heat resistance is preferable.

  The first case 200 includes a top plate 210 having a lid portion 205 that is in contact with the upper end portion of the electricity storage device 100 and both sides 200a and 200b and facing the gas vent valve 109 in the center, and a top plate 210 excluding the lid portion 205. An outer rib 230 rising upward from the periphery, an inner rib 250 falling downward from the periphery of the top plate 210 excluding the lid portion 205, and a plate-like first partition falling from the top plate so as to equally divide the top plate 210 And a member 201 (see FIG. 12C). The top plate 210 is rectangular in plan view, and the lid 205 is flush with the end surface 230 a of the outer rib 230.

  As described above, the first case 200 has the inner housing portion 207 partitioned by the top plate 210 and the inner rib 250, and is partitioned by the top plate 210 and the outer rib 230 on the opposite side of the inner housing portion 207. The outer housing portion 209 is provided.

  The outer rib 230 has a first side wall 231 parallel to the long side of the opening of the metal container 101 and a second side wall 233 parallel to the short side of the opening of the metal container 101 (that is, the stacking direction of the device group). Similarly, the inner rib 250 includes a first side wall 251 parallel to the long side of the opening of the metal container 101 and a second side wall 253 parallel to the short side of the opening of the metal container 101 (that is, the stacking direction of the device group). Have.

  The inner housing portion 207 is further divided into a plurality of sections 203 by the inner rib 250 and the first partition member 201. Each compartment 203 is fitted with one upper end portion of the electricity storage device. As clearly shown in FIG. 12C, the top plate 210 is provided with openings 211 corresponding to the two external terminals of each power storage device for each section. In other words, the inner housing portion 207 and the outer housing portion 209 communicate with each other through a plurality of openings 211 that expose the external terminals to the outer housing portion 209 side.

  As shown in FIGS. 5 and 6, the outer accommodating portion 209 accommodates the protruding external terminals 105 (107) of the electricity storage device 100 and the joining member 400 that connects adjacent terminals. On the other hand, external terminals that are not connected by the joining member 400 (bus bars 401 and 401X) are isolated from each other by the third partition member 202 provided in the outer housing portion 209. The end surface 230a of the outer rib 230 and the end surface 202a of the third partition member 202 are flush with each other.

  The third partition member 202 is useful for ensuring the safety of the work of connecting some external terminals to each other with a joining member 400 such as a bus bar. If the bus bar and / or tools miscontacts an external terminal that is not a connection target, the power storage device 100 is short-circuited, and the power storage device 100 is damaged or the safety of work is reduced. The third partition member 202 prevents such erroneous contact.

  The outer housing portion 209 may have a concavo-convex shape to be fitted with the connection member. Thereby, since arrangement | positioning of a joining member is controlled, the external terminal which should be connected can be selected without making a mistake, and an incorrect connection is prevented. The outer housing portion 209 is covered with a cover plate 570, and the external terminals and the connection structure are isolated from the outside.

  The second case 300 includes a rectangular bottom plate 310 that contacts the bottom surface of the electricity storage device 100, a rib 330 that rises upward from the periphery of the bottom plate, and a plate-shaped second plate that rises from the bottom plate so as to equally divide the bottom plate. And a partition member 301. The rib 330 is parallel to the long side of the opening of the metal container 101 and is parallel to the first side wall 331 (see FIG. 13B) having a recessed center and the short side of the opening of the metal container 101 (that is, the stacking direction of the device group). It has the 2nd side wall 333 (refer FIG. 13B).

  The second case 300 is divided into a plurality of sections 303 by the ribs 330 and the second partition members 301, and one power storage device is inserted into each section 303. As clearly shown in FIG. 13C, the bottom plate 310 is provided with an opening 311 for each section, and the opening 311 promotes heat radiation from the bottom surface of the electricity storage device 100.

  The first case 200 includes first engagement members 270 that extend to the second side wall 333 of the second case 300 at a plurality of symmetrical positions on the second side wall 233 (253). On the other hand, the second case 300 includes second engagement members 370 that engage with the first engagement member 270 at a plurality of locations corresponding to the first engagement member 270. By engaging the first engagement member 270 and the second engagement member 370, tension is applied to the first engagement member 270, and the device group is sandwiched between the first case 200 and the second case 300. Thereby, a device group is fixed still more firmly.

  Specifically, as shown in FIG. 12E, the first engaging member 270 is formed as a ring-shaped member extending downward from the second side wall 233 (253). On the other hand, as shown in FIG. 13D and FIG. 13E, the second engagement member 370 is formed as a protrusion having a thickness that tapers downward from the upper end in the vicinity of the upper end of the second side wall 333. The first case 200 and the second case 300 are connected by engaging the tip of the ring-shaped member with the protrusion.

  In the electricity storage device module according to the embodiment of the present invention, the abnormal temperature of the electricity storage device can be detected quickly and accurately. In addition, it is suitable for downsizing and large current, there are few structural restrictions on the mounting of the temperature detection sensor, the temperature management of the power storage device is easy, and the safety is excellent. In addition, it has high resistance to vibration and / or impact and can maintain excellent heat dissipation over a long period of time. Therefore, the said electrical storage device module is suitable for mounting in a vehicle, for example.

  100: electricity storage device, 100a: upper end portion, 100b: lower end portion, 101: metal container, 102: space, 103: sealing plate, 105 (105X): first external terminal, 107 (107Y): second external terminal, 109 : Gas vent valve, 200: First case, 200a, 200b: Side, 201: First partition member, 202: Third partition member, 202a: End surface of the third partition member, 203: Partition, 205: Lid, 207 : Inner housing portion, 209: outer housing portion, 210: top plate, 211: opening of top plate, 230: outer rib, 230a: end surface of outer rib, 231: first side wall of outer rib, 233: first side of outer rib 2 side walls, 250: inner rib, 251: first side wall of inner rib, 253: second side wall of inner rib, 270: first engaging member, 300: second case, 301: second partition member, 303: section 310: bottom plate, 311: opening of bottom plate, 330: rib, 331: first side wall of rib, 333: second side wall of rib, 370: second engaging member, 400: joining member, 401, 401X: bus bar 401a: terminal hole, 401b: screw hole, 401c: protrusion, 401A: electric conduction region, 401B: temperature detection region, 402: temperature detection sensor, 402a: screw hole, 402b: screw, 403: nut, 405: connection component 405a: hole, 405b: plate portion, 405c: columnar portion, 405d: hollow portion, 500: exterior case, 550: restraint plate, 570: cover plate, 571: through hole, 575: guide part, 580: temperature detection space 590: male screw, 600: circuit board, 601: terminal electrode, 700: power storage device module

Claims (12)

A group comprising two or more power storage devices each having an external terminal;
Including a circuit for controlling charging and discharging of the electricity storage device, and a substrate disposed along at least a part of the group;
A temperature detection sensor for detecting the temperature of the group;
A pair of input and output terminals for power input and output to the group ,
The circuit has a switch function for controlling power input / output to / from the power storage device,
The group and the substrate are connected by the pair of input / output terminals,
A power storage device module in which a space is held between the group and the substrate, and the pair of input / output terminals and the temperature detection sensor are arranged in the space. Furthermore, comprising a joining member that connects the external terminals of the adjacent electricity storage devices,
The joining member is arranged in the space,
The power storage device module according to claim 1, wherein the temperature detection sensor detects the temperature of the group via the bonding member. Before SL temperature detecting sensor, through at least one of said pair of input and output terminals, for detecting the temperature of said group, storage device module according to claim 1. Furthermore, it comprises an insulating holder that integrates the two or more power storage devices,
The holder comprises a first case that engages with one end of the group, and a second case that engages with the other end opposite to the one end of the group,
The first case includes an inner housing portion that engages with the one end portion of the group, and an outer housing portion disposed on the opposite side of the inner housing portion,
The space, the Ru Tei is held by the outer housing portion, the electric storage device module according to any one of claims 1 to 3. The power storage device includes a power generation element or a power storage element, and a square case that houses the power generation element or the power storage element,
The square case includes a metal container and a sealing plate that closes an opening of the metal container, and the sealing plate has the external terminal;
The power storage device module according to claim 4 , wherein the sealing plates of the two or more power storage devices are arranged in alignment at the one end. The first case has a first partition member interposed between adjacent power storage devices,
The second case has a second partition member interposed between the adjacent power storage devices,
The power storage device module according to claim 4 or 5 , wherein a space is held between the adjacent power storage devices by the first partition member and the second partition member. The electrical storage device module of any one of Claims 1-6 whose said electrical storage device is a battery and / or a capacitor.   The input / output terminal has a plate-like portion connected to the external terminal, and a columnar portion extending upward from the plate-like portion,
  The substrate has terminal electrodes;
  The power storage device module according to claim 1, wherein a tip end of the columnar part is connected to the terminal electrode.   The power storage device module according to claim 8, wherein the plate-like portion has a hole through which the external terminal passes and is crimped with a nut.   The power storage device module according to claim 8 or 9, wherein a tip of the columnar portion has a flat surface, and the flat surface is in surface contact with the terminal electrode.   The columnar part has a hollow part near the tip,
  The inner wall of the hollow portion has a female screw;
  The power storage device module according to claim 10, wherein the columnar portion and the terminal electrode are joined by fitting a male screw into the hollow portion.   The contact area between the flat surface of the columnar part and the terminal electrode is 20 mm. ² The power storage device module according to claim 10 or 11, which is the above.

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