JP2018073560A - Power supply device, and vehicle and power storage device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid, while using a common exhaust duct, unintended short circuit via the exhaust duct caused by a foreign object discharged from a secondary battery cell.SOLUTION: In order to discharge, to the outside, gas GS and a foreign object OB discharged upon opening of a safety valve in a secondary battery cell 1 included in each one of battery blocks 10, a power supply device has an exhaust duct 20 which is brought into communication with a battery block-side open window 14 arranged in each of the battery blocks 10. A foreign object movement inhibiting piece 30 is provided between the adjacent battery blocks 10 on a path of the exhaust duct 20. With such a configuration, the foreign object that has been discharged from one of the battery blocks may be inhibited from moving to another one of the battery blocks that is adjacent to the former one via the exhaust duct, thereby avoiding unintended short circuit via the conductive foreign object so as to be able to enhance reliability.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a power supply device, a vehicle using the same, and a power storage device.

  A power supply device with a large number of secondary battery cells can be connected to a series of secondary battery cells to increase the output voltage, so it can be used for applications that are charged and discharged with a large current, such as a drive power source for a hybrid vehicle. Has been. This power supply device is discharged with a very large current when accelerating the vehicle, and is charged with a considerably large current in a state such as regenerative braking. This power supply unit is equipped with a gas discharge valve for secondary battery cells such as cylindrical battery cells in order to prevent damage under abnormal conditions in which the internal pressure increases due to overcharge or overdischarge, etc. and to ensure safety. Is provided. The gas discharge valve opens and exhausts gas when the internal pressure of the battery rises abnormally. Each of the gas discharge valves communicates with a common exhaust duct. When the gas discharge valve is opened in an emergency, the gas is discharged to the outside through the exhaust duct (see, for example, Patent Documents 1 to 4). .

  However, what is discharged into the exhaust duct is not limited to gas, and includes foreign materials such as electrode material of the secondary battery cell, part of the valve, and carbonized powder. In particular, in a conventional cylindrical battery cell, a safety valve is provided only on the positive electrode side, and a configuration in which a safety valve is also provided on the negative electrode side has been proposed in order to increase the gas discharge capability as the output increases ( For example, see Patent Document 5). An example of such a secondary battery cell is shown in the cross-sectional view of FIG. The secondary battery cell 171 shown in this figure includes safety valves 172 and 172 on the positive side cover plate 175 and the negative side cover plate 177, respectively. Due to such a configuration, the amount of foreign matter discharged is increased by the increase in the area to be opened when the safety valve is opened. Since these foreign substances include those that have conductivity, if the foreign substances discharged in the exhaust duct accumulate and touch the end electrodes or outer cans of other secondary battery cells through the exhaust duct, a short circuit will occur. (Bridge) may occur. In order to avoid this, it is conceivable to prepare an exhaust duct individually for each secondary battery cell. However, this method complicates the configuration, and if the number of secondary battery cells increases, the exhaust duct is exclusively used. There is a problem that the area increases, the power supply device becomes larger, and the weight becomes heavier.

JP2015-135763 A Japanese Patent Laying-Open No. 2015-18706 JP 2012-199186 A JP 2000-182591 A Japanese Patent Laying-Open No. 2015-141821

  The present invention has been made in view of such a conventional background, and one of its purposes is to use a common exhaust duct, but to prevent the foreign matter discharged from the secondary battery cell from passing through the exhaust duct. An object of the present invention is to provide a power supply device that avoids a short circuit, a vehicle using the same, and a power storage device.

Means for Solving the Problems and Effects of the Invention

  According to the power supply device according to the first aspect of the present invention, a plurality of battery blocks including one or more secondary battery cells including a safety valve that can be opened according to an increase in internal pressure, and the plurality of battery blocks are arranged side by side. Each battery block is arranged in a posture opposite to one surface along the arrangement direction, and discharges gas and foreign matter discharged when the safety valve of the secondary battery cell included in each battery block is opened to the outside. A power supply device including a provided battery block side opening window and an exhaust duct respectively connected to the battery block side opening window, and a foreign matter movement blocking piece can be provided between adjacent battery blocks on the route of the exhaust duct. . With the above configuration, the foreign matter discharged from one battery block is prevented from moving to another adjacent battery block through the exhaust duct, and an unintentional short circuit through the conductive foreign matter is avoided to improve reliability. Can be increased.

  Moreover, according to the power supply device which concerns on a 2nd side surface, in addition to the said structure, the said foreign material movement prevention piece can be fixed to the attitude | position which cross | intersects with respect to the discharge direction of the gas in the said exhaust duct. With the above configuration, the physical movement of the solid foreign substance can be prevented by the foreign substance movement blocking piece.

  Furthermore, according to the power supply device according to the third aspect, in addition to any of the above-described configurations, the foreign matter movement prevention piece is disposed so as to partially narrow the cross-sectional area of the path of the exhaust duct of gas. Can do. With the above configuration, the cross-sectional area of the exhaust duct is narrowed by the foreign matter movement blocking piece, so that the movement of the solid foreign matter is prevented and the discharge of the gas is not hindered. Can be maintained.

  Furthermore, according to the power supply device according to the fourth aspect, in addition to any one of the above-described configurations, the foreign object movement prevention piece is inclined so as to gradually narrow the cross-sectional area of the path with respect to the gas discharge direction. Can be fixed to the exhaust duct. With the above configuration, the foreign object movement blocking piece is held in an inclined posture with respect to the gas discharge direction, and the movement of the solid foreign object is prevented, but the discharge of the gas gas is maintained.

  Furthermore, according to the power supply device according to the fifth aspect, in addition to any of the above-described configurations, the secondary battery cell has a cylindrical outer can, and both end faces of the cylindrical outer can The safety valves can be provided respectively. With the above configuration, when the safety valves provided on both end faces are opened, the amount of foreign matter released through the safety valve from secondary battery cells due to thermal runaway etc. also increases. The resulting short circuit can be effectively prevented to increase safety.

  Furthermore, according to the vehicle according to the sixth aspect, the electric vehicle including any one of the power supply devices described above, the power supply device, a motor for traveling that is supplied with power from the power supply device, and the power supply The vehicle body which mounts an apparatus and the said motor, and the wheel which drives with the said motor and drives the said vehicle body can be provided.

  Furthermore, according to the power storage device of the seventh aspect, the power storage device including any one of the power supply devices described above, further including a power supply controller that controls charging / discharging of the power supply device, and the power supply controller Therefore, the prismatic battery can be charged with external power, and the prismatic battery can be controlled to be charged.

1 is a perspective view showing a power supply device according to Embodiment 1. FIG. It is a horizontal sectional view in the II-II line of the power supply device of FIG. It is an expanded sectional view showing an example of a foreign substance movement prevention piece. It is an expanded sectional view which shows the other example of a foreign material movement prevention piece. It is an expanded sectional view which shows the other example of a foreign material movement prevention piece. It is an expanded sectional view which shows the other example of a foreign material movement prevention piece. It is an expanded sectional view which shows the other example of a foreign material movement prevention piece. It is an expanded sectional view which shows the other example of a foreign material movement prevention piece. It is an expanded sectional view which shows the other example of a foreign material movement prevention piece. It is an expanded sectional view which shows the other example of a foreign material movement prevention piece. It is an expanded sectional view which shows the other example of a foreign material movement prevention piece. 10 is a perspective view showing a power supply device according to Modification 1. FIG. It is a perspective view which shows the power supply device which concerns on the modification 2. FIG. It is a block diagram which shows the example which mounts a battery apparatus in the hybrid vehicle which drive | works with an engine and a motor. It is a block diagram which shows the example which mounts a battery apparatus in the electric vehicle which drive | works only with a motor. It is a block diagram which shows the example which uses a battery apparatus for an electrical storage apparatus. It is sectional drawing which shows the secondary battery cell which provided the safety valve in the positive electrode side and the negative electrode side.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a configuration for embodying the technical idea of the present invention, and the present invention is not limited to the following. Moreover, the member shown by the claim is not what specifies the member of embodiment. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the constituent members described in the embodiments are not intended to limit the scope of the present invention only, unless otherwise specified. It is just an example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing. In addition, the contents described in some examples and embodiments may be used in other examples and embodiments.

The power supply device described below will be described mainly as an example applied to a driving power source for an electric vehicle such as a hybrid vehicle that travels with both an engine and a motor and an electric vehicle that travels with only a motor. The power supply device of the present invention may be used for vehicles other than hybrid vehicles and electric vehicles, or for applications requiring high output other than electric vehicles, such as household and factory power storage devices.
(Embodiment 1)

FIG. 1 is a perspective view of the power supply device 100 according to the first embodiment, and FIG. 2 is a horizontal sectional view taken along line II-II in FIG. The power supply device 100 shown in these drawings includes a plurality of battery blocks 10 and an exhaust duct 20. The battery block 10 houses one or more secondary battery cells 1 in a battery block case 12. Here, each battery block 10 is configured by stacking a plurality of cylindrical secondary battery cells 1. The secondary battery cell 1 is provided with electrodes on the end face of the cylindrical outer can. Moreover, it laminates | stacks on the attitude | position which aligned the end surface of each secondary battery cell 1, and these are connected in series or parallel by the bus bar etc. As the secondary battery cell 1, for example, a lithium ion secondary battery, a nickel hydrogen secondary battery, a nickel cadmium secondary battery, or the like can be used.
(Safety valve 2)

  Non-aqueous electrolyte secondary battery cell 1 such as lithium ion secondary battery is overcharged, overdischarged, excessive current flows, physical shock is applied, external short circuit occurs, When subjected to severe conditions such as high temperature, the electrochemical reaction in the battery may run away, and the internal pressure of the battery rises to a high temperature, which may ignite or rupture. For this reason, the secondary battery cell 1 is provided with a safety valve 2 for releasing the internal pressure in case the battery internal pressure increases. The safety valve 2 opens as the internal pressure of the outer can increases. Such a safety valve 2 can be configured such that an elastic body such as a spring is urged to close the outer can from the outside to the inside, and the elastic body is pressed by the increase of the internal pressure to open the valve. Alternatively, the metal plate of the end face plate may be partially thinned, and the metal plate may be broken by increasing the internal pressure, so that the internal gas can be discharged from the broken portion.

The safety valve 2 is provided on at least one of the end face plates that close the end face of the outer can of the battery cell. The safety valve 2 may be provided on both sides of the end face of the outer can. As a result, gas can be quickly discharged from the inside of the secondary battery cell 1 in an abnormal state through the two safety valves, and explosion and ignition can be avoided. In addition, the amount of gas or foreign matter released increases by providing safety valves at a plurality of locations, and as described later, a foreign matter movement prevention piece 30 is provided to effectively prevent a short circuit caused by such foreign matter. Can increase the sex.
(Battery block case 12)

In the example of FIGS. 1 and 2, two battery blocks 10 are arranged. The battery block case 12 that houses each battery block 10 composed of the secondary battery cells 1 is a hollow box shape. The battery block case 12 is made of a resin or a metal whose surface is insulated. Moreover, the secondary battery cell 1 can hold | maintain the one or more secondary battery cells 1 in the battery block case 12 with a predetermined attitude | position using a resin battery holder etc., for example.
(Exhaust duct 20)

With the plurality of battery block cases 12 arranged side by side in this way, the exhaust duct 20 is arranged in a posture facing one surface along the arrangement direction. A battery block side opening window 14 is formed in a part of the battery block case 12 and communicates with the exhaust duct 20. On the other hand, on the exhaust duct 20 side, a duct side opening window 24 is formed at a position facing the battery block side opening window 14. A sealing member such as packing is disposed at the connecting portion between the battery block side opening window 14 and the duct side opening window 24 so as to be airtight, and prevents high-temperature and high-pressure gas from leaking from the connecting portion. Thereby, each battery block case 12 can be connected with the common exhaust duct 20, and the discharge route to the exterior, such as gas, can be built easily. That is, when any of the secondary battery cells 1 housed in each battery block case 12 opens the safety valve 2, the discharged gas and foreign matter are guided to the exhaust duct 20, and the power is supplied through the exhaust duct 20. In the case of a power supply device mounted on the outside of the device 100, for example, a vehicle, it is guided to be discharged outside the vehicle. In particular, not only the high-pressure and high-temperature gas GS is released from the safety valve 2 that has been opened due to the high pressure inside the secondary battery cell 1, but also various foreign substances OB, such as electrode materials or terminals. A metal piece such as a part is also included. Some of these have conductivity, and one battery block case 12 and the other battery block case 12 communicate with each other through the battery block side opening window 14 and the duct side opening window 24 as described above. Therefore, it is conceivable that such a conductive foreign object OB reaches the normal battery block side through the exhaust duct 20 and causes an unintended short circuit or the like.
(Foreign substance movement prevention piece 30)

  Therefore, as shown in the horizontal cross-sectional view of FIG. 2, a foreign matter movement prevention piece 30 is provided between the adjacent battery blocks 10 on the path of the exhaust duct 20. In the foreign matter movement blocking piece 30, the foreign matter OB discharged from the battery block side opening window 14 of one battery block 10 to the exhaust duct 20 passes through the exhaust duct 20 and the battery block side opening window 14 of another battery block 10. The gas GS is prevented from being discharged while being prevented from being moved. As a result, the foreign matter OB discharged from one battery block 10 is prevented from moving to another adjacent battery block 10 through the exhaust duct 20 and an unintended short circuit through the conductive foreign matter OB is avoided. Reliability.

  The foreign matter movement blocking piece 30 is preferably arranged so as to partially narrow the cross-sectional area of the path of the exhaust duct 20. In this way, while preventing the solid foreign object OB from moving along the exhaust duct 20, the discharge of the gas GS is not hindered by allowing the gas GS to pass through a portion having a reduced cross-sectional area. Thus, the smooth discharge of the high-pressure gas GS when the safety valve 2 is opened can be maintained. In the example of FIG. 2, the foreign substance movement blocking piece 30 is fixed to the exhaust duct 20 in an inclined posture that gradually narrows the cross-sectional area of the path with respect to the gas GS discharge direction (from right to left in FIG. 2). The foreign object movement prevention tab. By doing so, the discharge of the gas GS is not hindered, while the movement of the foreign matter OB can be effectively prevented by the foreign matter movement prevention tab. In the example of FIG. 2, the foreign object movement blocking piece 30 is fixed in an inclined posture with a flat plate shape. However, the shape of the foreign matter movement blocking piece is not limited to this, and for example, the foreign matter movement blocking piece may be formed in a curved surface in a sectional view like the foreign matter movement blocking piece 30B shown in FIG. 3, or the foreign matter movement blocking piece shown in FIG. 30C may be triangular, a triangular slope may be curved like a foreign object movement blocking piece 30D shown in FIG. 5, or may be stepped like a foreign substance movement blocking piece 30E shown in FIG. . In particular, by using a triangular shape or a staircase shape instead of a plate shape, it is possible to easily fix the foreign matter movement prevention piece stably in the exhaust duct.

  Alternatively, as shown in FIG. 7, the foreign substance movement blocking piece 30 </ b> F may be formed in a wall shape upright without providing an inclination. In this way, the foreign object movement blocking piece 30 is fixed in a posture that intersects the discharge direction of the gas GS in the exhaust duct 20, so that the physical movement of the solid foreign object OB is effective by the foreign object movement blocking piece 30. Can be blocked.

  Furthermore, it is not restricted to the structure which fixes the foreign material movement prevention piece 30 only to one wall surface in the exhaust duct 20, It is made to protrude alternately in the shape of a wall from the side surface of both sides like the foreign material movement prevention piece 30G shown in FIG. May be provided. At this time, as shown in FIG. 9, each foreign matter movement blocking piece 30H may be fixed in an inclined posture. Furthermore, as shown in FIG. 10, the foreign substance movement prevention piece 30I can also be formed in a spiral screw shape. Alternatively, as shown in FIG. 11, it is possible to adopt a configuration in which the foreign substance movement blocking piece 30J is configured in a mesh shape so that the foreign substance OB is blocked while the gas GS passes through the mesh. Moreover, you may combine the structure mentioned above suitably.

Such a foreign substance movement prevention piece 30 is preferably disposed between the battery block cases 12 on the inner surface of the exhaust duct 20. Accordingly, it is possible to effectively prevent the foreign object OB from moving across the battery block cases 12 through the exhaust duct 20.
(Modification 1)

It is preferable to open the battery block side opening window 14 on the downstream side in the discharge direction of the gas GS in the surface facing the exhaust duct 20 of the battery block case 12. By doing so, the direction in which the gas GS is discharged is unified in one direction, and the gas GS can be discharged smoothly. However, in the present invention, the opening position of the battery block side opening window 14 and the number to be opened are not limited to such a configuration. For example, the battery block side opening window 14 may be opened for each secondary battery cell 1 constituting the battery block 10. In this case, the foreign substance movement blocking piece 30 can be provided between the battery block side opening windows 14. Such an example is shown in the horizontal sectional view of FIG. 12 as a power supply device 200 according to the first modification. In this example, the battery block side opening window 14 is opened for each secondary battery cell 1, and the foreign substance movement blocking pieces 30 </ b> K are provided between the battery block side opening windows 14. As a result, it can be expected to prevent or reduce an unintended short-circuit caused by the foreign object OB between the secondary battery cells 1 housed in the common battery block case 12.
(Modification 2)

  Further, in the configuration in which safety valves are provided on both sides of the end face of the cylindrical outer can of the secondary battery cell, the battery block side opening window is provided only on one side surface of the battery block case arranged so that one safety valve faces. In addition, the battery block side opening window may be similarly provided on the surface side on which the other opposite safety valve is disposed. Such an example is shown in FIG. In the power supply device 300 shown in this figure, safety valves 2A and 2B are provided on the upper surface and the lower surface of the cylindrical secondary battery cell 1, respectively, and a battery block is provided at a position corresponding to each safety valve 2A and 2B in the battery block case 12. The side opening windows 14A and 14B are opened. Further, foreign matter movement blocking pieces 30L and 30M are fixed between the battery block side opening windows 14A and 14B, respectively. The upper and lower exhaust ducts 20A and 20B are respectively formed with duct side opening windows 24A and 24B at positions facing the battery block side opening windows 14A and 14B.

  In the example of FIGS. 12 and 13 described above, the configuration in which the foreign matter movement blocking pieces 30 are provided between all the adjacent battery block side opening windows 14 is shown, but it is not necessarily between adjacent laminated battery cells. It is not necessary to provide all foreign matter movement blocking pieces, and some may be omitted, for example, every other piece.

  As described above, according to the present embodiment, the foreign matter discharged from the battery block side opening window of one battery block to the exhaust duct with the foreign matter movement blocking piece passes through the battery duct side opening window of the other battery block through the exhaust duct. It is possible to prevent the gas from being disturbed while preventing the gas from being moved.

  In the above example, the example of the power supply device in which the secondary battery cells are arranged in the horizontal posture has been described, but the present invention does not specify the arrangement direction of the secondary battery cells in this configuration, for example, the posture in the vertical posture or the oblique direction It goes without saying that it is also possible. In particular, in the case of a configuration in which the secondary battery cell is arranged in a vertical posture and the exhaust duct is arranged on the upper surface thereof, the foreign matter movement prevention piece is formed by forming the foreign matter movement prevention piece in the shape of a wall and opening the upper part. The movement of the foreign object OB can be effectively prevented. In addition to making the foreign object movement blocking piece upright fixed, it can be inclined, and in this case as well, in order that the foreign object exceeds the foreign object movement blocking piece, the inclined surface must be scooped up, The movement of foreign matter can be effectively prevented.

  Moreover, although the example using the cylindrical secondary battery cell was described in the above example, the present invention does not limit the target secondary battery cell to the cylindrical one, and other shapes such as an outer can The present invention can also be applied to a secondary battery cell and a laminated secondary battery cell.

The above power supply apparatus can be used as a vehicle-mounted power supply. As a vehicle equipped with a power supply device, an electric vehicle such as a hybrid vehicle or a plug-in hybrid vehicle that runs with both an engine and a motor, or an electric vehicle that runs only with a motor can be used, and it is used as a power source for these vehicles. . In addition, in order to obtain electric power for driving the vehicle, a description will be given of an example in which a large-capacity, high-output power supply device 1000 in which a large number of the above-described power supply devices are connected in series or in parallel and a necessary control circuit is added is constructed. .
(Power supply for hybrid vehicles)

FIG. 14 shows an example in which a power supply device is mounted on a hybrid vehicle that runs with both an engine and a motor. A vehicle HV equipped with the power supply device shown in this figure includes a vehicle main body 90, an engine 96 and a travel motor 93 that travel the vehicle main body 90, a power supply device 1000 that supplies power to the motor 93, A generator 94 that charges the battery, and a wheel 97 that is driven by a motor 93 and an engine 96 to run the vehicle main body 90 are provided. The power supply apparatus 1000 is connected to a motor 93 and a generator 94 via a DC / AC inverter 95. The vehicle HV travels by both the motor 93 and the engine 96 while charging / discharging the battery of the power supply apparatus 1000. The motor 93 is driven to drive the vehicle when the engine efficiency is low, for example, during acceleration or low-speed driving. The motor 93 is driven by power supplied from the power supply apparatus 1000. The generator 94 is driven by the engine 96, or is driven by regenerative braking when the vehicle is braked, and charges the battery of the power supply apparatus 1000.
(Power supply for electric vehicles)

FIG. 15 shows an example in which a power supply device is mounted on an electric vehicle that runs only with a motor. A vehicle EV equipped with the power supply device shown in this figure includes a vehicle main body 90, a motor 93 for running the vehicle main body 90, a power supply device 1000 that supplies power to the motor 93, and a battery of the power supply device 1000. And a wheel 97 that is driven by a motor 93 and travels the vehicle main body 90. The motor 93 is driven by power supplied from the power supply apparatus 1000. The generator 94 is driven by energy when regeneratively braking the vehicle EV and charges the battery of the power supply apparatus 1000.
(Power storage device for power storage)

  Furthermore, this power supply apparatus can be used not only as a power source for a moving body but also as a stationary power storage facility. For example, as a power source for home and factory use, a power supply system that is charged with sunlight or midnight power and discharged when necessary, or a streetlight power supply that charges sunlight during the day and discharges at night, or during a power outage It can also be used as a backup power source for driving signals. Such an example is shown in FIG. The power supply apparatus 1000 shown in this figure forms a battery unit 82 by connecting a plurality of battery packs 81 in a unit shape. Each battery pack 81 has a plurality of secondary battery cells connected in series and / or in parallel. Each battery pack 81 is controlled by a power controller 84. The power supply apparatus 1000 drives the load LD after charging the battery unit 82 with the charging power supply CP. Therefore, the power supply apparatus 1000 has a charge mode and a discharge mode. The load LD and the charging power source CP are connected to the power supply apparatus 1000 via the discharging switch DS and the charging switch CS, respectively. ON / OFF of the discharge switch DS and the charge switch CS is switched by the power supply controller 84 of the power supply apparatus 1000. In the charging mode, the power controller 84 switches the charging switch CS to ON and the discharging switch DS to OFF to permit charging from the charging power supply CP to the power supply apparatus 1000. Further, when the charging is completed and the battery is fully charged, or in response to a request from the load LD in a state where a capacity of a predetermined value or more is charged, the power controller 84 turns off the charging switch CS and turns on the discharging switch DS to discharge. The mode is switched to permit discharge from the power supply apparatus 1000 to the load LD. Further, if necessary, the charge switch CS can be turned on and the discharge switch DS can be turned on to supply power to the load LD and charge the power supply apparatus 1000 at the same time.

  A load LD driven by the power supply apparatus 1000 is connected to the power supply apparatus 1000 via a discharge switch DS. In the discharge mode of the power supply apparatus 1000, the power supply controller 84 switches the discharge switch DS to ON, connects to the load LD, and drives the load LD with the power from the power supply apparatus 1000. As the discharge switch DS, a switching element such as an FET can be used. ON / OFF of the discharge switch DS is controlled by the power supply controller 84 of the power supply apparatus 1000. The power controller 84 also includes a communication interface for communicating with external devices. In the example of FIG. 16, it is connected to the host device HT according to an existing communication protocol such as UART or RS-232C. Further, if necessary, a user interface for the user to operate the power supply system can be provided.

  Each battery pack 81 includes a signal terminal and a power supply terminal. The signal terminals include a pack input / output terminal DI, a pack abnormality output terminal DA, and a pack connection terminal DO. The pack input / output terminal DI is a terminal for inputting / outputting signals from other pack batteries and the power supply controller 84, and the pack connection terminal DO is for inputting / outputting signals to / from other pack batteries which are child packs. Terminal. The pack abnormality output terminal DA is a terminal for outputting the abnormality of the battery pack to the outside. Furthermore, the power supply terminal is a terminal for connecting the battery packs 81 in series and in parallel.

  The power supply device according to the present invention, the vehicle including the power supply device, and the power storage device are suitably used as a power supply device for a plug-in hybrid electric vehicle, a hybrid electric vehicle, an electric vehicle, or the like that can switch between the EV traveling mode and the HEV traveling mode. it can. Also, a backup power supply device that can be mounted on a rack of a computer server, a backup power supply device for a wireless base station such as a mobile phone, a power storage device for home use and a factory, a power supply for a street light, etc. Also, it can be used as appropriate for applications such as a backup power source such as a traffic light.

1000, 100, 200, 300 ... power supply 1 ... secondary battery cell 2, 2A, 2B ... safety valve 10 ... battery block 12 ... battery block case 14, 14B ... battery block side opening window 20 ... exhaust ducts 24, 24A, 24B ... duct side opening windows 30, 30B, 30C, 30D, 30E, 30F, 30G, 30H, 30I, 30J, 30K, 30L, 30M ... Foreign matter movement prevention piece 81 ... Battery block 82 ... Battery unit 84 ... Power supply controller 85 ... Parallel Connection switch 90 ... Vehicle main body 93 ... Motor 94 ... Generator 95 ... DC / AC inverter 96 ... Engine 97 ... Wheel 171 ... Secondary battery cell 172 ... Safety valve 175 ... Positive electrode side cover plate 177 ... Negative electrode side cover plate GS ... Gas OB ... Foreign object HV ... Vehicle EV ... Vehicle CP ... Charging power supply LD ... Load DS ... Discharge switch CS ... Charge switch O ... output line HT ... the host device DI ... input and output terminals DA ... abnormal output terminal DO ... connection terminal

Claims (7)

A plurality of battery blocks including one or more secondary battery cells including a safety valve that can be opened in response to an increase in internal pressure;
A plurality of battery blocks are arranged side by side so as to face one surface along the arrangement direction, and the gas and foreign matter discharged when the safety valve of the secondary battery cell included in each battery block is opened are discharged to the outside. A power supply device comprising a battery block side opening window provided in each battery block and an exhaust duct communicated with each battery block,
A power supply device provided with a foreign matter movement blocking piece between adjacent battery blocks on the route of the exhaust duct. The power supply device according to claim 1,
A power supply apparatus in which the foreign matter movement blocking piece is fixed in a posture intersecting with a gas discharge direction in the exhaust duct. The power supply device according to claim 1 or 2,
A power supply device in which the foreign matter movement blocking piece is arranged so as to partially narrow a cross-sectional area of a path of the exhaust duct of gas. The power supply device according to any one of claims 1 to 3,
A power supply device in which the foreign substance movement prevention piece is fixed to the exhaust duct in an inclined posture so as to gradually narrow a cross-sectional area of a path with respect to a gas discharge direction. It is a power supply device as described in any one of Claims 1-4,
The power supply apparatus in which the secondary battery cell has a cylindrical outer can, and the safety valves are provided on both end faces of the cylindrical outer can. An electric vehicle comprising the power supply device according to any one of claims 1 to 5,
The power supply device, a traveling motor supplied with power from the power supply device, a vehicle main body on which the power supply device and the motor are mounted, and wheels that are driven by the motor and cause the vehicle main body to travel. An electric vehicle provided with the power supply device characterized by the above. A power storage device comprising the power supply device according to any one of claims 1 to 5,
A power supply controller for controlling charging and discharging of the power supply device;
A power storage device, wherein the power supply controller controls the prismatic battery to be charged while external battery power is allowed to be charged.

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