WO2013047399A1

WO2013047399A1 - Battery system, electric vehicle, moving body, power storage device, power source device, battery unit, and housing body

Info

Publication number: WO2013047399A1
Application number: PCT/JP2012/074323
Authority: WO
Inventors: 計美大倉
Original assignee: 三洋電機株式会社
Priority date: 2011-09-27
Filing date: 2012-09-24
Publication date: 2013-04-04
Also published as: JP2014232566A

Abstract

A battery system provided with a battery unit, a housing body configured so as to be capable of housing the battery unit, and a connection function part. The battery unit includes one or a plurality of battery cells, and an external connector. The battery cell(s), the external connector, and the connection function part form a serial connection in a state in which the battery unit is housed in the housing body. The connection function part breaks the serial connection in tandem with a removal action in which the battery unit is removed from the housing body.

Description

Battery system, electric vehicle, moving body, power storage device, power supply device, battery unit and container

The present invention relates to a battery system, an electric vehicle, a moving body, a power storage device, a power supply device, a battery unit, and a container.

Rechargeable secondary batteries are used in various fields. For example, the secondary battery is used as a power source for a hybrid electric vehicle (HEV), a battery electric vehicle (EV), a household power storage system, or a business power storage system. Such an electric power storage system includes, for example, an assembled battery in which a plurality of secondary batteries are incorporated in a rack installed outside or inside a building, and the plurality of secondary batteries incorporated in the rack are electrically connected to each other. It has a structure.

The power storage system described in Patent Document 1 has a configuration in which an electric room and a battery room are provided in a casing. A power converter, a protection circuit, and the like are housed inside the electrical chamber. A plurality of module batteries are accommodated in a rack inside the battery chamber. In each module battery, four secondary batteries are accommodated in a case. The four secondary batteries are connected in series via a plurality of strip-shaped wires. Furthermore, one end of one wiring is connected to the positive electrode of the secondary battery on one end side, and the other end of the wiring is drawn out of the case. Similarly, one end of another wiring is connected to the negative electrode of the secondary battery on the other end side, and the other end of the wiring is drawn out of the case. The other end of one wiring drawn from the case and the other end of the other wiring are exposed outside the case.

JP 2005-243580 A

[1] During assembly and maintenance of the above power storage system, an operator must handle the module battery so as not to touch the exposed end of the wiring outside the module battery case. Therefore, when an unskilled worker performs assembly and maintenance of the power storage system, the work efficiency decreases.

An object of the present invention is to provide a battery system, an electric vehicle, a movable body, a power storage device, a power supply device, and a battery unit that can improve the working efficiency of housing and removing the battery unit from the housing while ensuring safety. And providing a container.

A battery system according to the present invention includes a battery unit including one or a plurality of battery cells and an external connector connected to the outside, a container configured to be able to accommodate the battery unit, and a connection function unit. Is connected in series with the one or a plurality of battery cells, the external connector, and the connection function unit, and the connection function unit is connected in series with the operation of taking out the battery unit from the container. Disconnects the connection.

According to the present invention, it is possible to improve the work efficiency of housing and removing the battery unit from the housing while ensuring safety.

It is a block diagram which shows the structure of the power supply device which concerns on 1st Embodiment. It is a typical top view which shows the example of 1 structure of the battery unit which concerns on 1st Embodiment. It is a perspective view of the battery rack of FIG. FIG. 4 is a schematic plan view showing a state in which the battery unit of FIG. 2 is housed in the housing space of the battery rack of FIG. 3. It is a schematic plan view which shows the modification of the battery system which concerns on 1st Embodiment. It is a schematic plan view which shows one structural example of the battery unit which concerns on 2nd Embodiment. FIG. 7 is a schematic plan view showing a state in which the battery unit of FIG. 6 is housed in a battery rack according to a second embodiment. It is a figure for demonstrating the detail of the slide member of FIG. 7, and a fixing groove. It is a typical step view which shows the 1st modification of the battery system which concerns on 2nd Embodiment. It is a typical step view which shows the 2nd modification of the battery system which concerns on 2nd Embodiment. It is a typical top view which shows one structural example of the battery unit which concerns on 3rd Embodiment. It is a block diagram which shows the structure of an electric vehicle provided with the battery unit of FIG.

[1] First Embodiment A battery system, a power storage device, a power supply device, a battery unit, and a container according to a first embodiment will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the power supply device according to the first embodiment. As illustrated in FIG. 1, the power supply device 700 includes a power storage device 710 and a power conversion device 720. The power storage device 710 includes a battery system 711 and a system controller 712. The battery system 711 includes a plurality of battery units 500 and a battery rack 750. In the battery system 711 of this example, a plurality of battery units 500 are accommodated in the battery rack 750. In the present embodiment, the battery rack 750 is an example of a container. The plurality of battery units 500 may be connected to each other in parallel, or may be connected to each other in series. First, the configuration of the battery unit 500 will be described. Details of the configuration and operation of the power supply device 700 will be described in item (3-1) of the first embodiment.

(1) Configuration of Battery Unit FIG. 2 is a schematic plan view showing a configuration example of the battery unit 500 according to the first embodiment. As shown in FIG. 2, the battery unit 500 mainly includes a plurality (four in this example) of

battery modules

100a, 100b, 100c, and 100d, a service plug 510, a contactor 512, an HV (High Voltage) connector 511, a housing. The body 550 and the communication connection part CC are provided.

The plurality of battery modules 100a to 100d each include a plurality of battery cells 10 and a detection circuit 20. In each of the battery modules 100a to 100d, a plurality of (for example, 18) battery cells 10 having a flat and substantially rectangular parallelepiped shape are arranged so as to be aligned in one direction in a stacked state. The plurality of battery cells 10 and the pair of

end surface frames

92a, 92b are integrally fixed in a state where the pair of

end surface frames

92a, 92b having a substantially plate shape are disposed so as to sandwich the plurality of battery cells 10. The detection circuit 20 is attached to one end face frame 92a.

A positive electrode and a negative electrode are provided on the upper surface of each battery cell 10. Between two adjacent battery cells 10, the positive electrode of one battery cell 10 and the negative electrode of the other battery cell 10 are close to each other, and the negative electrode of one battery cell 10 and the positive electrode of the other battery cell 10 are Close to each other. In this state, the bus bar B is attached to two adjacent electrodes. The bus bar B is attached to the positive electrode of one battery cell 10 and the negative electrode of the other battery cell 10 that are close to each other, and the negative electrode of one battery cell 10 and the positive electrode of the other battery cell 10 that are close to each other The mounting of the bus bar B is alternately repeated, and the plurality of battery cells 10 are connected in series by the plurality of bus bars B.

A flexible printed circuit board (hereinafter abbreviated as FPC board) 50 is connected to a plurality of bus bars B in common. The FPC board 50 has a configuration in which a plurality of conductor wires are mainly formed on an insulating layer, and has flexibility and flexibility. The FPC board 50 is connected to the detection circuit 20. Thereby, the detection circuit 20 is connected to the plus electrode and the minus electrode of each battery cell 10. The detection circuit 20 is composed of, for example, an ASIC (Application Specific Integrated Circuit). Each detection circuit 20 detects, for example, the voltage, current, and temperature of the plurality of battery cells 10 of each of the battery modules 100a to 100d.

The detection circuit 20 of this example detects, for example, a voltage between both ends of a shunt resistor (not shown) provided in any of the above-described bus bars B, so that a plurality of battery cells 10 are based on the detection result. The flowing current can be detected.

In addition, the detection circuit 20 of this example is based on information obtained by a temperature sensor when a temperature sensor (thermocouple or the like) (not shown) is attached to the surface of an arbitrary battery cell 10 in each of the battery modules 100a to 100d, for example. The surface temperature of any battery cell 10 can be detected.

The battery modules 100a to 100d, the service plug 510, the HV connector 511, and the contactor 512 are accommodated in a box-shaped housing 550. The housing 550 includes a side surface portion 550a, a back surface portion 550b, a side surface portion 550c, and a front surface portion 550d formed of an insulating material. The

side surface portions

550a and 550c are parallel to each other, and the back surface portion 550b and the front surface portion 550d are parallel to each other and perpendicular to the

side surface portions

550a and 550c.

In the housing 550, the

battery modules

100a and 100b are arranged so as to be spaced apart from each other along the stacking direction of the battery cells 10. Further, the

battery modules

100c and 100d are arranged so as to be spaced apart from each other along the stacking direction of the battery cells 10. Hereinafter, the

battery modules

100a and 100b arranged to be spaced apart from each other are referred to as a module row T1, and the

battery modules

100c and 100d arranged to be spaced apart from each other are referred to as a module row T2.

In the housing 550, the module row T1 is disposed along and close to the side surface portion 550a, and the module row T2 is disposed along and close to the side surface portion 550c. Thereby, the module row T1 and the module row T2 are arranged in parallel to each other.

In this embodiment, the service plug 510 is switched between an on state and an off state by an on / off switching unit 764 (FIG. 4) described in the item (2-1) of the first embodiment. When the service plug 510 is turned on, a series connection between the battery module 100a and the battery module 100d is formed in the battery unit 500. When the service plug 510 is turned off, the serial connection between the battery module 100a and the battery module 100d is disconnected. The service plug 510 is turned on and a series connection is formed between the battery module 100a and the battery module 100d, whereby a voltage is generated in the HV connector 511. The service plug 510 is turned off, and the series connection is disconnected between the battery module 100a and the battery module 100d, that is, the electrical path is electrically cut off, so that no voltage is generated in the HV connector 511. For example, when the service person works for maintenance, the service person turns off the service plug 510 and disconnects the serial connection between the battery module 100a and the battery module 100d.

A service plug 510 is provided on the back surface portion 550b of the housing 550 so as to be adjacent to the battery module 100b. Further, the HV connector 511 is provided on the back surface portion 550b of the housing 550 so as to be adjacent to the battery module 100c. Further, a contactor 512 is provided between the battery module 100c and the back surface portion 550b of the housing 550.

In each of the

battery modules

100a, 100b, 100c, and 100d, the potential of the positive electrode of the battery cell 10 adjacent to the end face frame 92a is the highest, and the potential of the negative electrode of the battery cell 10 adjacent to the end face frame 92b is the lowest. The end surface frame 92a of the battery module 100a is directed to the front surface portion 550d, and the end surface frame 92b of the battery module 100b is directed to the side surface portion rear surface portion 550b. The end surface frame 92a of the battery module 100c is directed to the side surface portion rear surface portion 550b, and the end surface frame 92b of the battery module 100d is directed to the front surface portion 550d.

The low potential electrode 10B (the lowest potential negative electrode 10b) of the battery module 100a and the high potential electrode 10A (the highest potential positive electrode 10a) of the battery module 100b are connected to each other via the power line D21. The low potential electrode 10B of the battery module 100c and the high potential electrode 10A of the battery module 100d are connected to each other via the power line D22.

A conductive relay member TM is attached to the high potential electrode 10A of the battery module 100a, the low potential electrode 10B of the battery module 100b, the high potential electrode 10A of the battery module 100c, and the low potential electrode 10B of the battery module 100d. The relay member TM attached to the high potential electrode 10A of the battery module 100a is connected to the service plug 510 via the power line D23, and the relay member TM attached to the low potential electrode 10B of the battery module 100d is serviced via the power line D24. Connected to plug 510.

The relay member TM attached to the low potential electrode 10B of the battery module 100b is connected to the contactor 512 via the power line D25a, and the relay member TM attached to the high potential electrode 10A of the battery module 100c is connected to the contactor 512 via the power line D26a. Connected to. Contactor 512 is connected to HV connector 511 through power lines D25b and D26b. The contactor 512 includes at least one of a switch for electrically connecting or electrically separating the power line D25a and the power line D25b, and a switch for electrically connecting or electrically separating the power line D26a and the power line D26b. Prepare.

When the contactor 512 has only a switch provided between the power line D25a and the power line D25b, the power line D26a and the power line D26b may not be connected to the contactor 512. Similarly, when the contactor 512 includes only a switch provided between the power line D26a and the power line D26b, the power line D25a and the power line D25b may not be connected to the contactor 512.

When the contactor 512 includes a switch provided between the power line D25a and the power line D25b and a switch provided between the power line D26a and the power line D26b, the two switches are turned on or off at the same timing.

HV connector 511 is electrically connected to power converter 720 (FIG. 1) while battery unit 500 is housed in battery rack 750 (FIG. 1). On the other hand, the HV connector 511 is electrically separated from the power converter 720 (FIG. 1) in a state where the battery unit 500 is taken out from the battery rack 750 (FIG. 1).

The service plug 510 is switched from the off state to the on state by the on / off switching unit 764 (FIG. 4) in conjunction with the housing operation in which the battery unit 500 (FIG. 1) is housed in the battery rack 750 (FIG. 1). As described above, in the on state, a series connection is formed between the battery module 100a and the battery module 100d. On the other hand, the service plug 510 is switched from the on state to the off state by the on / off switching unit 764 (FIG. 4) in conjunction with the removal operation in which the battery unit 500 (FIG. 1) is taken out from the battery rack 750 (FIG. 1). As described above, in the off state, the series connection between the battery module 100a and the battery module 100d is disconnected. Details of the storing operation and the extracting operation will be described in item (2-1) of the first embodiment.

When the contactor 512 is turned on, the low potential electrode 10B of the battery module 100b is connected to the HV connector 511 via the power supply lines D25a and D25b, and the high potential electrode 10A of the battery module 100c is connected to the power supply lines D26a and D26b. To the HV connector 511.

Thereby, power is supplied from the

battery modules

100a, 100b, 100c, and 100d to the power conversion device 720 (FIG. 1) with the service plug 510 and the contactor 512 turned on. Alternatively, with the service plug 510 and the contactor 512 turned on, power is supplied from the power conversion device 720 (FIG. 1) to the

battery modules

100a, 100b, 100c, and 100d, and charging is performed. When the contactor 512 is turned off, the connection between the battery module 100b and the HV connector 511 and the connection between the battery module 100c and the HV connector 511 are disconnected.

In the present embodiment, the contactor 512 is not necessarily provided in the battery unit 500. In this case, the relay member TM attached to the low potential electrode 10B of the battery module 100b is connected to the HV connector 511 via the power line D25a, and the relay member TM attached to the high potential electrode 10A of the battery module 100c is connected to the power line D26a. To the HV connector 511.

The detection circuit 20 of the battery module 100a and the detection circuit 20 of the battery module 100b are connected to each other via a communication line P21. The detection circuit 20 of the battery module 100a and the detection circuit 20 of the battery module 100d are connected to each other via a communication line P22. The detection circuit 20 of the battery module 100c and the detection circuit 20 of the battery module 100d are connected to each other via a communication line P23.

A communication connection portion CC for connection with the system controller 712 (FIG. 1) is provided on the back surface portion 550b of the housing 550. The detection circuit 20 of the battery module 100b is connected to the communication connection part CC via the communication line P24.

In the back surface portion 550b of the housing 550, a vent hole 591 is formed on the extension line of the vent path R1 between the module rows T1 and T2. In addition, vents 592 are formed at the position of the back surface portion 550b close to the side surface portion 550a and the position of the back surface portion 550b close to the side surface portion 550c.

(2) Battery System (2-1) Installation of Battery Unit As described above, in the battery system 711 of FIG. 1, a plurality of battery units 500 are accommodated in the battery rack 750. FIG. 3 is a perspective view of the battery system 711 of FIG. 3, a plurality of battery units 500 and a battery rack 750 of the battery system 711 in FIG. 1 are shown in a perspective view. As shown in FIG. 3, the battery rack 750 includes

side portions

751 and 752, a top surface portion 753, a bottom surface portion 754, a back surface portion 755, and a plurality of partition portions 756. The

side surface portions

751 and 752 extend vertically in parallel with each other. The upper surface portion 753 extends horizontally so as to connect the upper end portions of the

side surface portions

751 and 752 to each other, and the bottom surface portion 754 extends horizontally so as to connect the lower end portions of the

side surface portions

751 and 752 to each other. A back surface portion 755 extends vertically up and down perpendicular to the

side surface portions

751 and 752 along one side of the side surface portion 751 and one side of the side surface portion 752. Between the top surface portion 753 and the bottom surface portion 754, a plurality of partition portions 756 are provided in parallel to the top surface portion 753 and the bottom surface portion 754 at equal intervals.

A plurality of storage spaces 757 are provided between the top surface portion 753, the plurality of partition portions 756, and the bottom surface portion 754. Each accommodation space 757 opens to the front surface (surface opposite to the back surface portion 755) of the battery rack 750. The battery unit 500 of FIG. 2 is accommodated in each accommodation space 757 from the front surface of the rack 750.

FIG. 4 is a schematic plan view showing a state in which the battery unit 500 of FIG. 2 is accommodated in the accommodation space 757 of the battery rack 750 of FIG. As shown in FIG. 4, the battery unit 500 is housed in the housing space 757 of the battery rack 750 such that the back surface portion 550 b of the battery unit 500 faces the back surface portion 755 of the battery rack 750.

The rear surface 755 of the battery rack 750 is provided with a cooling fan 761, two vent holes 762, a communication connection unit 763, an on / off switching unit 764, and a power connection unit 765 for each storage space 757.

The cooling fan 761 is provided at a position facing the vent 591 of the battery unit 500. The vent 762 is provided at a position facing the vent 592 of the battery unit 500. The communication connection unit 763 is provided at a position facing the communication connection unit CC of the battery unit 500. The on / off switching unit 764 is provided at a position facing the service plug 510 of the battery unit 500. The power connection portion 765 is provided at a position facing the HV connector 511 of the battery unit 500. The communication connection unit 763 is electrically connected to the system controller 712. The power connection unit 765 is electrically connected to the power conversion device 720.

In FIG. 4, the contactor 512 of FIG. 2 and the battery module 100a to 100d of the battery unit 500, the service plug 510, the HV connector 511, the on / off switching unit 764, and the power connection unit 765 are easily understood. The illustration of the plurality of communication lines P21 to P24 is omitted, and the high potential electrode 10A and the low potential electrode 10B of the plurality of battery modules 100a to 100d and the power lines D21, D22, D23, D24, D25a, D25b, D26a, D26b are provided. This is schematically illustrated by a thick solid line.

Further, as shown in FIG. 4, the service plug 510 includes a first terminal 510A and a second terminal 510B. The HV connector 511 includes a first terminal 511A and a second terminal 511B. The on / off switching unit 764 includes a third terminal 764A and a fourth terminal 764B. The power connection portion 765 includes a third terminal 765A and a fourth terminal 765B. The on / off switching unit 764 is made of a conductive material. In the on / off switching unit 764, the third terminal 764A and the fourth terminal 764B are integrally configured.

In the present embodiment, service plug 510 and on / off switching unit 764 are examples of connection function units, service plug 510 is an example of a contacted portion, and on / off switching unit 764 is an example of a contact member and a conductive member. The ON operation of the service plug 510 is an example in which a serial connection is formed, and the OFF operation of the service plug 510 is an example in which the serial connection is disconnected. Further, the HV connector 511 is an example of an external connector, and the first terminal 510A and the second terminal 510B of the service plug 510 are examples of first and second terminals. Furthermore, the battery unit 500 including the service plug 510 is an example of a battery unit, the battery rack 750 including the on / off switching unit 764 is an example of a container, and the cooling fan 761 is an example of a cooling device.

In the present embodiment, the accommodating operation refers to, for example, inserting the battery unit 500 into the accommodating space 757 from the outside of the battery rack 750 and bringing the back surface portion 550b of the battery unit 500 close to the back surface portion 755 of the battery rack 750. By this, the operation | movement which accommodates the battery unit 500 in the battery rack 750 is said.

Further, the removal operation refers to an operation of taking out the battery unit 500 to the outside of the battery rack 750 by, for example, pulling out the battery unit 500 existing in the storage space 757 from the storage space 757.

In conjunction with the above housing operation in which the battery unit 500 is housed in the housing space 757 of the battery rack 750, the first terminal 510A and the second terminal 510B of the service plug 510 are respectively connected to the third terminal 764A and the third terminal 764A of the on / off switching unit 764. Connected to 4 terminals 764B. That is, the on / off switching unit 764 contacts the service plug 510. Thereby, the first terminal 510A and the second terminal 510B of the service plug 510 are electrically connected, and the service plug 510 is turned on. As a result, the plurality of battery modules 100a to 100d of the battery unit 500 are connected in series. In this case, in a state where the battery unit 500 is housed in the housing space 757 of the battery rack 750, the power lines D21, D22, D23, D24, D25a, D25b, D26a, D26b, the service plug 510, the on / off switching unit 764, a plurality of bus bars. B (FIG. 2) and the relay member TM (FIG. 2) automatically form an electrical path for electrically connecting the plurality of battery modules 100a to 100d and the HV connector 511 in conjunction with the housing operation.

Further, in conjunction with the accommodating operation in which the battery unit 500 is accommodated in the accommodating space 757 of the battery rack 750, the first terminal 511A and the second terminal 511B of the HV connector 511 are connected to the third terminal 765A and the Each is connected to 4 terminals 765B. Accordingly, the first terminal 511A and the second terminal 511B of the HV connector 511 are connected to the power conversion device 720, respectively. At this time, as described above, since the service plug 510 is turned on, the plurality of battery modules 100a to 100d and the HV connector 511 are electrically connected, and the plurality of battery modules 100a to 100d of the battery unit 500 and the power conversion device are connected. Power can be exchanged with 720.

Further, the communication connection part CC of the battery unit 500 and the communication connection part 763 of the battery rack 750 are connected in conjunction with the accommodating operation in which the battery unit 500 is accommodated in the accommodating space 757 of the battery rack 750. The detection circuits 20 of the battery modules 100a to 100d are connected to the communication connection part CC via the communication lines P21 to P24. Therefore, the detection circuit 20 of the battery modules 100a to 100d and the system controller 712 are connected to be communicable.

On the other hand, the first terminal 510A and the second terminal 510B of the service plug 510 are respectively connected to the third terminal 764A and the fourth terminal 764A of the on / off switching unit 764 in conjunction with the extraction operation in which the battery unit 500 is extracted from the storage space 757 of the battery rack 750. It is pulled out from the terminal 764B. That is, the on / off switching unit 764 is separated from the service plug 510. Thereby, the electrical path between the first terminal 510A and the second terminal 510B of the service plug 510 is cut off, and the service plug 510 is turned off. As a result, the series connection between the

battery modules

100a and 100b of the battery unit 500 and the

battery modules

100c and 100d is disconnected. That is, the

battery modules

100a and 100b and the

battery modules

100c and 100d of the battery unit 500 are automatically and electrically separated from each other in conjunction with the take-out operation. Accordingly, no voltage is generated between the first terminal 511A and the second terminal 511B. The total voltage of the series circuit composed of the

battery modules

100a and 100b and the total voltage of the series circuit composed of the

battery modules

100c and 100d are about half of the total voltage of the series circuit composed of the

battery modules

100a, 100b, 100c and 100d. be able to.

Further, in conjunction with the take-out operation in which the battery unit 500 is taken out from the storage space 757 of the battery rack 750, the first terminal 511A and the second terminal 511B of the HV connector 511 are respectively connected to the third terminal 765A and the fourth terminal 765A of the power connection portion 765. It is pulled out from the terminal 765B. Thereby, the first terminal 511 </ b> A and the second terminal 511 </ b> B of the HV connector 511 are electrically separated from the power converter 720. Therefore, power is not exchanged between the plurality of battery modules 100a to 100d of the battery unit 500 and the power conversion device 720.

Furthermore, the communication connection part CC of the battery unit 500 is pulled out from the communication connection part 763 of the battery rack 750 in conjunction with the take-out operation in which the battery unit 500 is taken out from the storage space 757 of the battery rack 750. Thereby, the communication connection part CC and the communication connection part 763 are electrically separated.

In a state where the battery unit 500 is accommodated in the accommodation space 757 of the battery rack 750, the cooling gas is introduced into the housing 550 through the vent 591 by the cooling fan 761. As a result, the heat of each battery cell 10 (FIG. 2) of the battery modules 100a to 100d is absorbed by the cooling gas in the housing 550. The cooling gas that has absorbed heat in the housing 550 is discharged through the vent 592 of the housing 550 and the vent 762 of the battery rack 750. In this way, each battery cell 10 of the battery modules 100a to 100d is cooled.

In this embodiment, since the cooling fan 761 is provided in the battery rack 750, there is no need to provide a cooling fan for each battery unit 500. Thereby, the cost of the battery system 711 is reduced. Note that each battery unit 500 may be provided with a cooling fan as long as the cooling gas can be introduced into the housing 550 of each battery unit 500.

In this example, all the battery units 500 are accommodated in one battery rack 750, but all the battery units 500 may be accommodated in a plurality of battery racks 750. Alternatively, a plurality of battery racks 750 corresponding to all of the battery units 500 may be prepared, and all of the battery units 500 may be individually accommodated in the plurality of battery racks 750 respectively corresponding to the battery racks 750.

(2-2) Effect on Battery System In the battery system 711 according to the present embodiment, the service plug 510 is connected by the on / off switching unit 764 in conjunction with the take-out operation in which the battery unit 500 is taken out from the battery rack 750 as a container. The on-state is changed to the off-state, and the series connection between the

battery modules

100a and 100b and the

battery modules

100c and 100d is disconnected. That is, the electrical path between the

battery modules

100a and 100b and the

battery modules

100c and 100d is blocked.

Thus, when the battery unit 500 is not accommodated in the battery rack 750, an electrical path for electrically connecting the HV connector 511 as an external connector and the plurality of battery modules 100a to 100d is not formed. Therefore, no voltage is generated in the HV connector 511 in a state where the battery unit 500 is not accommodated in the battery rack 750. As a result, handling of the battery unit 500 is facilitated, and the work efficiency of assembly and maintenance of the battery system 711 is improved.

The service plug 510 is changed from the off state to the on state by the on / off switching unit 764 in conjunction with the housing operation in which the battery unit 500 is housed in the battery rack 750 as the housing body, so that the

battery modules

100a and 100b, A series connection with 100d is formed. At this time, an electrical path including the power lines D21, D22, D23, D24, D25a, D25b, D26a, D26b, the service plug 510, the on / off switching unit 764, the plurality of bus bars B, and the relay member TM is formed. Thus, the plurality of battery modules 100a to 100d and the HV connector 511 as an external connector are electrically connected.

Thus, when the battery unit 500 is accommodated in the battery rack 750, the HV connector 511 as the external connector, the plurality of battery modules 100a to 100d, the service plug 510, and the on / off switching unit 764 constitute a series circuit. In this case, the operator does not need to individually turn on and off the service plug 510. Therefore, the work efficiency of assembly and maintenance of the battery system 711 is further improved.

In the present embodiment, the service plug 510 as the contacted portion includes a first terminal 510A and a second terminal 510B provided as first and second terminals so as to be separated from each other. The on / off switching unit 764 as a contact member is made of a conductive material.

In the present embodiment, the HV connector 511 as an external connector is connected to the power connection portion 765 in conjunction with the accommodating operation in which the battery unit 500 is accommodated in the accommodating space 757 of the battery rack 750. In addition, the HV connector 511 and the power connection portion 765 are electrically separated in conjunction with the removal operation for removing the battery unit 500 from the battery rack 750. As a result, the worker accommodates the battery unit 500 in the battery rack 750 so that the battery unit 500 can be externally connected to the power connection unit 765 (the power conversion device 720 or another battery unit 500) without performing wiring connection work. Can be easily connected to. In addition, the operator can easily remove the battery unit 500 from the outside (the power conversion device 720 or the other battery unit 500) without removing the wiring by removing the battery unit 500 from the battery rack 750. .

The battery rack 750 is provided with a cooling fan 761 for cooling the battery unit 500 in a state where the battery unit 500 is accommodated in the battery rack 750. In this case, since it is not necessary to provide the cooling fan 761 in the battery unit 500, the cost of the battery unit 500 is reduced.

As described in item [3-1] of the third embodiment, each of the battery modules 100a to 100d is based on the information about the voltage, current, and temperature detected by the detection circuit 20 of each of the battery modules 100a to 100d. And a detection circuit 20 of each of the battery modules 100a to 100d and an external device (a main control unit of FIG. 12 to be described later) as a communication control unit while performing a process of detecting an abnormality of each of the battery modules 100a to 100d. There is a battery ECU 101 (FIG. 11) that communicates with the computer 300. The battery rack 750 may be provided with a battery ECU 101 (FIG. 11) in addition to the cooling fan 761 described above. In this case, since it is not necessary to provide the battery ECU 500 (FIG. 11) in the battery unit 500, the cost of the battery unit 500 is reduced.

In the back surface portion 550b of the battery unit 500, a service plug 510 and an HV connector 511 are provided with a vent 591 interposed therebetween. Therefore, a certain interval is provided between the service plug 510 and the HV connector 511. Thereby, in a state where the battery unit 500 is taken out from the battery rack 750, the operator can connect the first terminal 510A or the second terminal 510B of the service plug 510 with the first terminal 511A or the second terminal 511B of the HV connector 511. Touching both is prevented.

(3) Power Supply Device (3-1) Configuration and Operation Details The configuration and operation of the power supply device 700 in FIG. 1 will be described in detail. The system controller 712 in FIG. 1 is an example of a system control unit, and includes, for example, a CPU and a memory, or a microcomputer. The system controller 712 is connected to the detection circuits 20 (FIG. 2) of the battery modules 100a to 100d (FIG. 2) in each battery unit 500 in a state where the battery units 500 are accommodated in the battery rack 750. The The voltage, current and temperature detected by the detection circuit 20 of each of the battery modules 100a to 100d are given to the system controller 712. The system controller 712 calculates the charge amount of each battery cell 10 (FIG. 2) based on the voltage, current, and temperature given from each detection circuit 20, and controls the power conversion device 720 based on the calculated charge amount. By doing so, control regarding discharging or charging of the plurality of battery cells 10 included in each battery unit 500 is performed.

The power converter 720 includes a DC / DC (DC / DC) converter 721 and a DC / AC (DC / AC) inverter 722. The DC / DC converter 721 has input /

output terminals

721a and 721b, and the DC / AC inverter 722 has input /

output terminals

722a and 722b. The input / output terminal 721 a of the DC / DC converter 721 is connected to the battery system 711 of the power storage device 710. The input / output terminal 721b of the DC / DC converter 721 and the input / output terminal 722a of the DC / AC inverter 722 are connected to each other and to the power output unit PU1. The input / output terminal 722b of the DC / AC inverter 722 is connected to the power output unit PU2 and to another power system. The power output units PU1, PU2 include, for example, outlets. For example, various loads are connected to the power output units PU1 and PU2. Other power systems include, for example, commercial power sources or solar cells. The power output units PU1, PU2 and other power systems are external examples connected to the power supply device.

The DC / DC converter 721 and the DC / AC inverter 722 are controlled by the system controller 712, whereby the plurality of battery cells 10 included in the battery system 711 are discharged and charged.

When the battery system 711 is discharged, the power supplied from the battery system 711 is DC / DC (direct current / direct current) converted by the DC / DC converter 721 and further DC / AC (direct current / alternate current) converted by the DC / AC inverter 722. .

The power DC / DC converted by the DC / DC converter 721 is supplied to the power output unit PU1. The power DC / AC converted by the DC / AC inverter 722 is supplied to the power output unit PU2. DC power is output to the outside from the power output unit PU1, and AC power is output to the outside from the power output unit PU2. The electric power converted into alternating current by the DC / AC inverter 722 may be supplied to another electric power system.

When the battery system 711 is discharged, the system controller 712 determines whether to stop discharging the battery system 711 based on the calculated charge amount, and controls the power conversion device 720 based on the determination result. Specifically, when the charge amount of any one of the plurality of battery cells 10 (FIG. 2) included in the battery system 711 becomes smaller than a predetermined threshold, the system controller 712 The DC / DC converter 721 and the DC / AC inverter 722 are controlled so that the discharge of the system 711 is stopped. Thereby, overdischarge of each battery cell 10 is prevented.

On the other hand, when the battery system 711 is charged, AC power supplied from another power system is AC / DC (AC / DC) converted by the DC / AC inverter 722 and further DC / DC (DC / DC) is converted by the DC / DC converter 721. DC) converted. When power is supplied from the DC / DC converter 721 to the battery system 711, the plurality of battery cells 10 (FIG. 2) included in the battery system 711 are charged.

When charging the battery system 711, the system controller 712 determines whether to stop charging the battery system 711 based on the calculated charge amount, and controls the power conversion device 720 based on the determination result. Specifically, when the charge amount of any one of the plurality of battery cells 10 (FIG. 2) included in the battery system 711 is larger than a predetermined threshold, the system controller 712 The DC / DC converter 721 and the DC / AC inverter 722 are controlled so that charging of the system 711 is stopped. Thereby, overcharge of each battery cell 10 is prevented.

(3-2) Effects Regarding Power Storage Device and Power Supply Device In power supply device 700 according to the present embodiment, power conversion device 720 performs power conversion between battery cell 10 and the outside. A system controller 712 as a system control unit controls the power conversion device 720 to perform control related to charging or discharging of the battery cell 10 of the battery system 711. Thereby, in the power storage device 710, deterioration, overdischarge, and overcharge of the battery cell 10 can be prevented. Further, since the battery unit 500 described above is used, the workability of assembly and maintenance of the battery system 711 is improved while ensuring safety. Therefore, the manufacturing cost of the power supply device 700 is reduced, and the operation cost of the power supply device 700 is also reduced.

(4) Modified Example of First Embodiment (4-1) FIG. 5 is a schematic plan view showing a modified example of the battery system 711 according to the first embodiment. FIG. 5 shows a state in which the battery unit 500 according to the modification is housed in the housing space 757 of the battery rack 750. Differences between the battery system 711 in FIG. 5 and the battery system 711 in FIG. 1 will be described.

In the battery system 711 of FIG. 5, instead of attaching the plurality of detection circuits 20 to the end surface frames 92a (FIG. 2) of the plurality of battery modules 100a to 100d of the

battery unit

500, 1 is attached to the back surface portion 755 of the battery rack 750. Two detection circuits 766 are attached. The detection circuit 766 is electrically connected to the communication connection unit 763 and is also electrically connected to the system controller 712.

In this case, a plurality of FPC boards 50 (FIG. 2) provided in the plurality of battery modules 100a to 100d are connected to the communication connection portion CC via a wiring member (not shown) such as a harness. As a result, the communication connection portion CC of the battery unit 500 and the communication connection portion 763 of the battery rack 750 are connected in conjunction with the above-described housing operation, whereby the detection circuit 766 is connected to all of the battery modules 100a to 100d. The battery cell 10 is connected to the plus electrode and the minus electrode.

Thereby, the detection circuit 766 detects, for example, the voltage, current, and temperature of the plurality of battery cells 10 of each of the battery modules 100a to 100d. The voltage, current, and temperature detected by the detection circuit 766 are supplied to the system controller 712.

In this case, since the battery rack 750 is provided with the detection circuit 766, it is not necessary to provide the detection circuit 20 for each battery module. Thereby, the cost of the battery unit 500 is reduced.

(4-2) With respect to the power supply device 700 of FIG. 1, if the power supply device 700 and the outside can supply power to each other, the power conversion device 720 can select any of the DC / DC converter 721 and the DC / AC inverter 722. You may have only one of them. Further, the power conversion device 720 may not be provided as long as power can be supplied between the power supply device 700 and the outside.

Further, in the power supply device 700 of FIG. 1, a plurality of battery units 500 are provided, but not limited to this, only one battery unit 500 may be provided.

(4-3) In the present embodiment, the cooling fan 761 is used to introduce cooling gas into the housing 550 of each battery unit 500. Not limited to this, the cooling fan 761 may operate to suck the atmosphere in the housing 550 of each battery unit 500 and discharge it to the outside of the battery rack 750. In this case, the atmosphere in the housing 550 is discharged to the outside of the battery rack 750 through the vent 591 in a state where the battery unit 500 is housed in the housing space 757 of the battery rack 750. On the other hand, the atmosphere outside the casing 550 is introduced into the casing 550 through the vent 762 of the battery rack 750 and the vent 592 of the casing 550. In this manner, the gas circulates between the inside of the housing 550 and the outside of the battery rack 750, whereby each battery cell 10 of the battery modules 100a to 100d is cooled.

(4-4) The configuration for cooling the plurality of battery cells 10 in the battery unit 500 is not limited to the above example.

For example, a unit side refrigerant pipe is attached in the battery unit 500 so as to contact the plurality of battery cells 10. In addition, a refrigerant inflow connection port including a gasket is provided at one end of the unit side refrigerant pipe attached to the battery unit 500, and a refrigerant outflow connection port including a gasket is provided at the other end of the unit side refrigerant pipe. Further, the battery rack 750 is connected to the refrigerant pump, the refrigerant pump and the rack side refrigerant pipe configured to be connectable to the refrigerant inflow connection port of the battery unit 500, and the battery unit 500 connected to the refrigerant pump. A rack side refrigerant pipe configured to be connectable to the refrigerant outflow connection port is provided.

In this case, by connecting each of the refrigerant inflow connection port and the refrigerant outflow connection port of the battery unit 500 to the rack side refrigerant pipe, the refrigerant is connected between the unit side refrigerant pipe in the battery unit 500 and the refrigerant pump of the battery rack 750. The circulation path is configured. When a refrigerant such as cooling water flows into the refrigerant inflow connection port of the battery unit 500 by the refrigerant pump, the refrigerant passes through the unit side refrigerant pipe and flows out from the refrigerant outflow connection port. Thereby, the some battery cell 10 which contact | connects unit side refrigerant | coolant piping is cooled.

(4-5) In the present embodiment, the battery unit 500 may include one battery module. Further, each of the battery modules 100a to 100d may be constituted by one battery cell 10. Further, the number of battery cells 10 constituting the plurality of battery modules 100a to 100d may be different for each battery module.

(4-6) In each of the battery modules 100a to 100d, a plurality of battery cells 10 are connected in series by a plurality of bus bars B. Not limited to this, in each of the battery modules 100a to 100d, all of the plurality of battery cells 10 may be connected in parallel, or the plurality of battery cells 10 may be connected in a combination of series and parallel. In this case, each of the battery modules 100a to 100d functions as a battery cell in the claims.

(4-7) The battery unit 500 includes n battery cells 10 connected in series (n is a natural number of 2 or more), n battery cells 10 connected in parallel, or n connected in series and parallel. One battery cell 10 may be included. In this case, for example, the lowest potential among the electrodes having the highest potential among the plurality of electrodes of the n battery cells 10 and the first terminal 511 </ b> A of the HV connector 511, or among the plurality of electrodes of the n battery cells 10. A service plug 510 may be provided as a connection function unit between the first electrode and the second terminal 511B of the HV connector 511.

(4-8) The battery unit 500 may include a cluster of i (i is a natural number of 2 or more) battery cells 10 and a cluster of j (j is a natural number of 2 or more) battery cells 10. In this case, the i battery cells 10 may be connected in series or in parallel. Alternatively, i battery cells 10 may be connected in a combination of series and parallel. Similarly, j battery cells 10 may be connected in series or in parallel. Alternatively, j battery cells 10 may be connected in a combination of series and parallel. In this case, for example, a service plug 510 may be provided as a connection function unit between a cluster of i battery cells 10 and a cluster of j battery cells 10.

When the electrode having the lowest potential among the plurality of electrodes of i battery cells 10 and the electrode having the highest potential among the plurality of electrodes of j battery cells 10 are connected, i batteries The electrode having the highest potential among the plurality of electrodes of the cell 10 and the first terminal 511A of the HV connector 511, or the electrode having the lowest potential among the plurality of electrodes of the j battery cells 10 and the first of the HV connector 511. A service plug 510 may be provided between the two terminals 511B. The battery unit 500 is not limited to the above-described two battery cell 10 blocks (i battery cells 10 and j battery cells 10), and may include three or more battery cell 10 blocks. . In that case, for example, the connection function unit (for example, the service plug 510) exists between any of the masses of the battery cells 10.

[2] Second Embodiment A battery system according to a second embodiment will be described while referring to differences from the battery system 711 according to the first embodiment.

(1) Configuration FIG. 6 is a schematic plan view showing a configuration example of the battery unit 500 according to the second embodiment. As shown in FIG. 6, the battery unit 500 according to the present embodiment includes a slide member 90 in addition to the configuration of the battery unit 500 of FIG. In the battery unit 500 of FIG. 6, unlike the configuration of the battery unit 500 of FIG. 2, the service plug 510 is provided on the front surface portion 550d of the housing 550 so as to be adjacent to the battery module 100a. A slide member 90 is provided on the front surface portion 550d so as to face the service plug 510.

FIG. 7 is a schematic plan view showing a state in which the battery unit 500 of FIG. 6 is accommodated in the battery rack according to the second embodiment. In FIG. 7, the contactor 512 and the plurality of communication lines P21 in FIG. 6 are easy to understand the connection relationship among the plurality of battery modules 100a to 100d, the service plug 510, the HV connector 511, and the power connection unit 765 of the battery unit 500. The illustration of P24 is omitted, and the high potential electrode 10A and the low potential electrode 10B and the power lines D21, D22, D23, D24, D25a, D25b, D26a, and D26b of the plurality of battery modules 100a to 100d are schematically illustrated by thick solid lines. Illustrated in FIG.

As shown in FIG. 7, in the battery rack 750 according to the present embodiment, a fixing groove 90g into which a part of the slide member 90 can be fitted is formed inside the side surface portion 751. In the present embodiment, the slide member 90 and the fixing groove 90g are examples of the fixing mechanism. Details of the slide member 90 and the fixing groove 90g will be described.

FIG. 8 is a diagram for explaining the details of the slide member 90 and the fixing groove 90g of FIG. FIG. 8A shows a part of a side view (front view) of the battery system 711 showing a state in which the battery unit 500 is housed in the housing space 757 of the battery rack 750, and FIG. A sectional view taken along line AA of a) is shown.

As shown in FIGS. 8A and 8B, the slide member 90 of this example is a rod-shaped member having a rectangular cross section. The slide member 90 is attached to the front surface portion 550d so as to be movable in a direction parallel to the front surface portion 550d and perpendicular to the

side surface portions

550a and 550c (FIG. 7). Thereby, the slide member 90 is movable between the first position p1 and the second position p2 on the front surface portion 550d. With the slide member 90 in the first position p1, the entire slide member 90 is located on the front surface portion 550d. On the other hand, in a state where the slide member 90 is in the second position p2, a part of the slide member 90 protrudes from one side of the front surface portion 550d (the side where the side surface portion 550a and the front surface portion 550d intersect each other).

The fixing groove 90g of the battery rack 750 is formed at a position facing the slide member 90 in a state where the battery unit 500 is disposed in the accommodation space 757. Thereby, the battery unit 500 is arranged in the accommodation space 757 in a state where the slide member 90 is in the first position p1, and the slide member 90 is moved from the first position p1 to the second position p2. A part of the slide member 90 protruding from one side of the front surface portion 550d is fitted into the fixed groove 90g of the battery rack 750. Thereby, the battery unit 500 is fixed to the battery rack 750 in a state where the battery unit 500 is disposed in the battery rack 750.

As shown in FIGS. 8A and 8B, the service plug 510 of the battery unit 500 includes a first terminal 510A, a second terminal 510B, and a terminal support 510C. The power line D23 of FIGS. 6 and 7 is connected to the first terminal 510A, and the power line D24 of FIGS. 6 and 7 is connected to the second terminal 510B. The terminal support portion 510C is made of an insulating material. The terminal support portion 510C fixes the first terminal 510A and the second terminal 510B to the front surface portion 550d so as to be aligned vertically with a space therebetween. At this time, part of the first terminal 510A and the second terminal 510B (the hatched part in FIG. 8A) is exposed to the outside of the front surface part 550d.

As shown in FIGS. 8A and 8B, the slide member 90 includes a main body 91 and a metal plate 92. The main body 91 is made of an insulating material. A cutout is provided in a part of the main body 91 made of a rod-shaped member having a rectangular cross section. A metal plate 92 is fitted into the portion of the main body 91 where the notch is formed.

In the present embodiment, the metal plate 92 does not face the service plug 510 when the slide member 90 is at the first position p1, and the metal plate 92 is at the service plug when the slide member 90 is at the second position p2. The slide member 90 is attached to the front surface portion 550d so as to face 510.

In this case, the metal plate 92 is separated from the first terminal 510A and the second terminal 510B of the service plug 510 with the slide member 90 in the first position p1, and between the first terminal 510A and the second terminal 510B. The electrical path is interrupted and the service plug 510 is turned off. As a result, the series connection between the

battery modules

100a and 100b (FIG. 7) of the battery unit 500 and the

battery modules

100c and 100d (FIG. 7) is disconnected, and the

battery modules

100a and 100b, the

battery modules

100c and 100d, Are electrically isolated from each other. Accordingly, in the HV connector 511, no voltage is generated between the first terminal 511A and the second terminal 511B. The total voltage of the series circuit composed of the

battery modules

100a and 100b and the total voltage of the series circuit composed of the

battery modules

100a, 100b, 100c and 100d. Therefore, when the slide member 90 is in the first position p1, the voltage generated in the battery unit 500 is half of the voltage generated during normal use.

On the other hand, with the slide member 90 in the second position p2, the metal plate 92 contacts the first terminal 510A and the second terminal 510B of the service plug 510, and the first terminal 510A and the second terminal 510B are electrically connected. Connected and the service plug 510 is turned on. As a result, a series connection is formed between the plurality of battery modules 100a to 100d of the battery unit 500. In this case, the power lines D21, D22, D23, D24, D25a, D25b, D26a, D26b (FIG. 6), the first terminal 510A (FIG. 8) of the service plug 510, the second terminal 510B (FIG. 8) of the service plug 510, The metal plate 92 (FIG. 8), the plurality of bus bars B (FIG. 6), and the relay member TM (FIG. 6) form an electrical path that electrically connects the plurality of battery modules 100a to 100d and the HV connector 511.

In the present embodiment, the service plug 510 and the slide member 90 are examples of connection function units, the service plug 510 is an example of a contacted portion, the metal plate 92 of the slide member 90 is an example of a contact member, and HV The connector 511 is an example of an external connector. Further, the slide member 90 and the fixing groove 90g of the battery rack 750 are examples of the fixing mechanism. Furthermore, the battery unit 500 including the service plug 510 and the slide member 90 is an example of a battery unit.

Further, a state where a part of the slide member 90 is fitted in the fixing groove 90g is an example of a fixed state, and a state where the slide member 90 is detached from the fixing groove 90g is an example of a released state. Further, the moving operation in which the slide member 90 moves from the first position p1 to the second position p2 in a state where the battery unit 500 is disposed in the battery rack 750 is an example of the first switching operation. An example of the second switching operation is a moving operation in which the slide member 90 moves from the second position p2 to the first position p1 in a state where is disposed in the battery rack 750.

6 to 8, the slide member 90 is provided on the front surface portion 550d of the battery unit 500. However, the slide member 90 may be provided on the side surface 751 of the battery rack 750. Further, the fixing groove 90g may be formed in the side surface portion 550a of the battery unit 500 facing the slide member 90 in a state where the battery unit 500 is arranged in the accommodation space 757. Also in this case, the slide member 90 is moved in a state where the battery unit 500 is disposed in the accommodation space 757, and a part of the slide member 90 is fitted into the fixed groove 90g. Thereby, the battery unit 500 is fixed to the battery rack 750.

In the example of FIGS. 6 to 8 described above, the service plug 510 has the first terminal 510A and the second terminal 510B, and the metal plate 92 of the slide member 90 comes into contact with the first terminal 510A and the second terminal 510B. The service plug 510 is turned on. Further, the service plug 510 is turned off by separating the metal plate 92 of the slide member 90 from the first terminal 510A and the second terminal 510B.

Not limited to this, the service plug 510 electrically connects between the power line D23 and the power line D24 in conjunction with a moving operation in which the slide member 90 moves from the first position p1 to the second position p2. The member 90 may be configured by a switch that electrically separates the power line D23 and the power line D24 in conjunction with a moving operation in which the member 90 moves from the second position p2 to the first position p1. In this case, it is not necessary to provide the metal plate 92 on the slide member 90.

(2) Effects related to the battery system In the present embodiment, the housing operation includes a moving operation in which the slide member 90 moves from the first position p1 to the second position p2. The take-out operation includes a moving operation in which the slide member 90 moves from the second position p2 to the first position p1.

In a state where the battery unit 500 is disposed in the battery rack 750 as a container, the slide member 90 that is a fixing mechanism is moved from the first position p1 to the second position p2 as the first switching operation in the housing operation. The service plug 510 is turned on in conjunction with the operation. In this case, a series connection between the

battery modules

100a and 100b (FIG. 7) of the battery unit 500 and the

battery modules

100c and 100d (FIG. 7) is formed. Thereby, the power lines D21, D22, D23, D24, D25a, D25b, D26a, D26b, the first terminal 510A of the service plug 510, the second terminal 510B of the service plug 510, the metal plate 92, the plurality of bus bars B, and the relay member TM. A plurality of battery modules 100a to 100d and the HV connector 511 are electrically connected by the electrical path. At the same time, the battery unit 500 is fixed to the battery rack 750 in conjunction with the movement of the slide member 90 from the first position p1 to the second position p2.

On the other hand, in the state where the battery unit 500 is disposed in the battery rack 750 as the container, the slide member 90 as the fixing mechanism is moved from the second position p2 to the first position p1 as the second switching operation in the take-out operation. The service plug 510 is turned off in conjunction with the moved operation. In this case, the serial connection between the

battery modules

100a and 100b and the

battery modules

100c and 100d is cut, and the electrical path between the

battery modules

100a and 100b and the

battery modules

100c and 100d is cut off. At the same time, the battery unit 500 can be detached from the battery rack 750 in conjunction with the movement of the slide member 90 from the second position p2 to the first position p1.

Thus, when the slide member 90 is in the second position p2, the battery unit 500 is fixed to the battery rack 750, and when the slide member 90 is in the first position p1, the battery unit 500 is in the battery rack 750. Not fixed. Therefore, the operator cannot take out the battery unit 500 from the battery rack 750 in a state where the service plug 510 is turned on. Therefore, the worker does not touch the HV connector 511 where the voltage is generated. On the other hand, the operator can take out the battery unit 500 from the battery rack 750 with the service plug 510 turned off. Therefore, no voltage is generated in the HV connector 511 in a state where the operator may touch the HV connector 511. As a result, the work efficiency of the worker is improved.

(3) First Modification of Second Embodiment FIG. 9 is a schematic step view showing a first modification of the battery system according to the second embodiment. FIG. 9A shows a state in which the battery unit 500 according to the first modification is being accommodated in one accommodation space 757 of the battery rack 750. FIG. 9B shows a state after the battery unit 500 according to the first modification is accommodated in one accommodation space 757 of the battery rack 750. Hereinafter, differences between the battery system 711 in FIG. 9 and the battery system 711 in FIG. 7 will be described.

The battery unit 500 of this example includes a cover 590 and a pair of rotating members 80 in addition to the configuration of the battery unit 500 of FIGS. The lid portion 590 is made of a rectangular plate member and is configured to cover the upper portion of the housing 550 of FIG. Each of the pair of rotating members 80 has a substantially L shape. In addition, the pair of rotating members 80 are attached to the vicinity of two corners of the lid portion 590 adjacent to the front surface portion 550d so as to be rotatable by the support shafts 89, respectively. Inside the housing 550, a service plug 510 is provided between the battery module 100a (FIG. 6) and the front surface portion 550d of the housing 550. In the present embodiment, service plug 510 is configured by a switch that can electrically connect and electrically isolate power line D23 (FIG. 6) and power line D24 (FIG. 6). . The switch is configured to be switched between an on state and an off state in conjunction with the rotational operation of the pair of rotating members 80.

In the battery rack 750 of this modification, a fixing groove 80g into which a part of the rotating member 80 can be inserted is formed inside the side surface portion 751. The fixing groove 80g includes a slide surface 758a and a contact surface 758b orthogonal to the partition portion 756 (FIG. 8) of the battery rack 750. The slide surface 758a and the contact surface 758b face each other. The slide surface 758a is located farther from the back surface portion 755 of the battery rack 750 than the contact surface 758b. The slide surface 758 a is inclined with respect to the back surface portion 755, and the contact surface 758 b is parallel to the back surface portion 755. In the present example, the rotating member 80 and the fixing groove 80g function as a fixing mechanism. Details of the rotating member 80 and the fixed groove 80g will be described.

As shown in FIGS. 9A and 9B, each rotating member 80 includes a long shaft portion 81 and a short shaft portion 82. The long shaft portion 81 and the short shaft portion 82 can rotate around the support shaft 89.

As shown in FIG. 9A, in the middle of the battery unit 500 being housed in the housing space 757, the tip portion of the short shaft portion 82 of each rotating member 80 is inserted into the fixed groove 80g. In this state, as indicated by a thick arrow q in FIG. 9A, for example, the operator rotates the long shaft portions 81 of the pair of rotating members 80 so as to approach each other. In this case, in each fixed groove 80g, the tip of each short shaft portion 82 moves on the slide surface 758a toward the contact surface 758a. Thereby, as shown by the thick arrow r in FIG. 9A, the battery unit 500 moves toward the back surface portion 755 in the accommodation space 757.

At this time, a strong pressing force toward the back surface portion 755 is generated in the battery unit 500. Accordingly, the communication connection portion CC and the HV connector 511 provided on the back surface portion 550b of the battery unit 500 are securely inserted into the communication connection portion 763 and the power connection portion 765 provided in the battery rack 750, respectively, with a strong pressing force. .

After that, as shown in FIG. 9B, a part of the short shaft portion 82 abuts against the abutting surface 758b inside each fixing groove 80g, and the battery unit 500 is accommodated in the accommodating space 757. Thereby, the battery unit 500 is fixed to the battery rack 750 in a state where the battery unit 500 is disposed in the battery rack 750.

In the present modification, the switch of the service plug 510 is configured to be switched from the off state to the on state in conjunction with a rotation operation in which the pair of long shaft portions 81 are rotated so as to approach each other.

When the battery unit 500 is removed from the battery rack 750, the pair of long shaft portions 81 are rotated away from each other. Thereby, the tip end portion of the short shaft portion 82 is pulled out from the inside of the fixed groove 80g, and the battery unit 500 is pulled out from the storage space 757.

In this modification, the switch of the service plug 510 is configured to be switched from the on state to the off state in conjunction with the rotation operation in which the pair of long shaft portions 81 are rotated so as to be separated from each other.

In this modification, the service plug 510 is an example of a connection function unit, and the rotating member 80 and the fixing groove 80g are examples of a fixing mechanism. Further, the state in which the short shaft portion 82 of each rotating member 80 is in contact with the contact surface 758b of the fixed groove 80g is an example of a fixed state, and the short shaft portion 82 of each rotating member 80 is the contact surface 758b of the fixed groove 80g. The state separated from the is an example of the release state. Further, the operation of rotating the pair of long shaft portions 81 so as to approach each other is an example of the first switching operation, and the operation of rotating the pair of long shaft portions 81 so as to be separated from each other is an example of the second switching operation. is there. Furthermore, the battery unit 500 including the service plug 510 is an example of a battery unit.

In this example, the battery unit 500 is fixed to the battery rack 750 by rotating the pair of long shaft portions 81 so as to approach each other, and the service plug 510 is turned on from the off state. On the other hand, when the pair of long shaft portions 81 are rotated away from each other, the battery unit 500 can be removed from the battery rack 750, and the service plug 510 is changed from the on state to the off state. Therefore, when the service plug 510 is in the on state, the operator cannot take out the battery unit 500 from the battery rack 750. Therefore, the worker does not touch the HV connector 511 where the voltage is generated. On the other hand, when the service plug 510 is in the off state, the operator can take out the battery unit 500 from the battery rack 750. Therefore, no voltage is generated in the HV connector 511 in a state where the operator may touch the HV connector 511. As a result, the work efficiency of the worker is improved.

In this modification, a member for fixing the positional relationship between the pair of long shaft portions 81 may be attached in a state where the battery unit 500 is disposed in the battery rack 750. In this case, the battery unit 500 is more firmly fixed in the battery rack 750.

In the present modification, the shape of the rotating member 80 is not limited to the substantially L shape described above. The rotating member 80 may have any other shape and structure as long as it can fix the battery unit 500 to the battery rack 750 by rotating.

(3) Second Modification of Second Embodiment FIG. 10 is a schematic step view showing a second modification of the battery system according to the second embodiment. FIG. 10A shows a state in which the battery unit 500 according to the second modification is being accommodated in one accommodation space 757 of the battery rack 750. FIG. 10B shows a state after the battery unit 500 according to the second modification is accommodated in one accommodation space 757 of the battery rack 750. Hereinafter, differences between the battery system 711 in FIG. 10 and the battery system 711 in FIG. 9 will be described.

The battery unit 500 of this modification includes the same lid portion 590 and a pair of rotating members 80 as those of the example of FIG. 9 in addition to the configuration of the battery unit 500 of FIG. Inside the housing 550, the service plug 510 is provided on the back surface portion 550b of the housing 550, as in the example of FIG.

Further, in the present modification, as in the example of FIG. 4, an on / off switching portion 764 is provided as a conductive member on the back surface portion 755 of the battery rack 750. Furthermore, in the battery rack 750 of this modification, the same fixing groove 80g as that of the example of FIG. 9 is formed. Also in this modified example, the rotating member 80 and the fixing groove 80g function as a fixing mechanism.

Also in this modified example, as shown in FIG. 10A, the tip portion of the short shaft portion 82 of each rotating member 80 is inserted into the fixing groove 80g while the battery unit 500 is housed in the housing space 757. Then, the long shaft portions 81 of the pair of rotating members 80 are rotated so as to approach each other. Thereby, the communication connection part CC, the service plug 510, and the HV connector 511 provided on the back surface part 550b of the battery unit 500 are respectively connected to the communication connection part 763, the on / off switching part 764, and the power connection part 765 provided in the battery rack 750. It is securely inserted by a strong pressing force.

Thereafter, as shown in FIG. 10B, a part of the short shaft portion 82 abuts against the abutting surface 758b inside each fixing groove 80g, and the battery unit 500 is accommodated in the accommodating space 757. Thereby, the battery unit 500 is fixed to the battery rack 750 in a state where the battery unit 500 is disposed in the battery rack 750.

In conjunction with this accommodating operation, the communication connection part CC, the service plug 510 and the HV connector 511 of the battery unit 500 are connected to the communication connection part 763, the on / off switching part 764 and the power connection part 765 provided in the battery rack 750, respectively. Is done. At the time of this connection, the first plug 510A and the second plug 510B of the service plug 510 are plugged into the on / off switching portion 764 in conjunction with the housing operation in which the battery unit 500 is housed in the battery rack 750. 510 goes from the off state to the on state.

In conjunction with this removal operation, the communication connection part CC, the service plug 510 and the HV connector 511 of the battery unit 500 are electrically connected from the communication connection part 763, the on / off switching part 764 and the power connection part 765 provided in the battery rack 750, respectively. Separated. During this separation, the first plug 510A and the second plug 510B of the service plug 510 are pulled out from the on / off switching unit 764 in conjunction with the pulling-out operation in which the battery unit 500 is pulled out from the battery rack 750, whereby the service plug 510 Changes from on to off.

In this modification, the service plug 510 and the on / off switching unit 764 are examples of connection function units, the service plug 510 is an example of a contacted unit, and the on / off switching unit 764 is an example of a contact member and a conductive member. The rotating member 80 and the fixing groove 80g are examples of the fixing mechanism. The first terminal 510A and the second terminal 510B of the service plug 510 are examples of first and second terminals, and the on / off switching unit 764 is an example of a conductive member. Further, the state in which the short shaft portion 82 of each rotating member 80 is in contact with the contact surface 758b of the fixed groove 80g is an example of a fixed state, and the short shaft portion 82 of each rotating member 80 is the contact surface 758b of the fixed groove 80g. The state separated from the is an example of the release state. Further, the operation of rotating the pair of long shaft portions 81 so as to approach each other is an example of the first switching operation, and the operation of rotating the pair of long shaft portions 81 so as to be separated from each other is an example of the second switching operation. is there. Furthermore, the battery unit 500 including the service plug 510 is an example of a battery unit, and the battery rack 750 including the on / off switching unit 764 is an example of a container.

Also in this modification, as in the first modification described above, no voltage is generated in the HV connector 511 in a state where the operator may touch the HV connector 511. As a result, the work efficiency of the worker is improved.

[3] Third Embodiment A battery system, an electric vehicle, a moving body, and a battery unit according to a third embodiment will be described with reference to the drawings.

[3-1] Battery Unit First, the difference of the battery unit according to the third embodiment from the first embodiment will be described. FIG. 11 is a schematic plan view showing a configuration example of the battery unit 500 according to the third embodiment. As shown in FIG. 11, a battery unit 500 according to the third embodiment includes a battery ECU 101 in addition to the configuration of the battery unit 500 of FIG.

The battery ECU 101 is provided between the battery module 100b and the back surface portion 550b of the housing 550. In the present embodiment, the detection circuit 20 of the battery module 100b is connected to the battery ECU 101 via the communication line P24, and the battery ECU 101 is connected to the main control part 300 (described later) via the communication line P25 and the communication connection part CC. 12).

In the present embodiment, the detection circuit 20 of each of the battery modules 100a to 100d gives information on the voltage, current and temperature of each battery cell 10 to the other battery modules 100a to 100d or the battery ECU 101, for example. Hereinafter, the information on the voltage, current, and temperature is referred to as cell information.

The battery ECU 101 calculates the charge amount of each battery cell 10 based on, for example, cell information given from each battery module 100a to 100d, and performs charge / discharge control of each battery module 100a to 100d based on the charge amount.

Further, the battery ECU 101 detects an abnormality of each of the battery modules 100a to 100d based on the cell information given from the detection circuit 20 of each of the battery modules 100a to 100d. The abnormality of the battery modules 100a to 100d is, for example, overdischarge, overcharge or temperature abnormality of the battery cell 10.

In this way, the battery ECU 101 performs charge / discharge control of each of the battery modules 100a to 100d and performs processing for detecting an abnormality of each of the battery modules 100a to 100d, and detects each of the battery modules 100a to 100d as a communication control unit. Communication is performed between the circuit 20 and an external device (main control unit 300 in FIG. 12 described later). The battery ECU 101 may be provided in the battery rack 750 of FIG. 1 instead of being provided in the battery unit 500.

[3-2] Electric Vehicle (1) Configuration FIG. 12 is a block diagram showing a configuration of an electric vehicle including the battery unit 500 of FIG. As shown in FIG. 12, the electric automobile 600 includes a vehicle body 610. The vehicle body 610 is provided with the battery system 711, the power conversion unit 601, the motor 602, the drive wheels 603, the accelerator device 604, the brake device 605, the rotation speed sensor 606, and the main control unit 300 described above. The battery system 711 includes the battery unit 500 and the battery rack 750 of FIG. When motor 602 is an alternating current (AC) motor, power conversion unit 601 includes an inverter circuit.

The battery system 711 is connected to the motor 602 via the power converter 601 and also connected to the main controller 300. The main control unit 300 is given a charge amount of each battery cell 10 of each of the battery modules 100a to 100d, an abnormality of the battery modules 100a to 100d, and the like from the battery ECU 101 of FIG. In addition, an accelerator device 604, a brake device 605, and a rotation speed sensor 606 are connected to the main control unit 300. The main control unit 300 includes, for example, a CPU and a memory, or a microcomputer. *

The accelerator device 604 includes an accelerator pedal 604a included in the electric automobile 600 and an accelerator detection unit 604b that detects an operation amount (depression amount) of the accelerator pedal 604a. When the accelerator pedal 604a is operated by the driver, the accelerator detector 604b detects the operation amount of the accelerator pedal 604a based on a state where the driver is not operated. The detected operation amount of the accelerator pedal 604a is given to the main controller 300.

The brake device 605 includes a brake pedal 605a included in the electric automobile 600 and a brake detection unit 605b that detects an operation amount (depression amount) of the brake pedal 605a by the driver. When the brake pedal 605a is operated by the driver, the operation amount is detected by the brake detection unit 605b. The detected operation amount of the brake pedal 605a is given to the main control unit 300.

Rotational speed sensor 606 detects the rotational speed of motor 602. The detected rotation speed is given to the main control unit 300.

The main control unit 300 is given the charge amount of each battery cell 10 of the battery modules 100a to 100d, the operation amount of the accelerator pedal 604a, the operation amount of the brake pedal 605a, the rotation speed of the motor 602, and the like. The main control unit 300 performs charge / discharge control of the battery module 100 and power conversion control of the power conversion unit 601 based on these pieces of information.

For example, when the electric vehicle 600 is started and accelerated based on the accelerator operation, the power of the battery modules 100a to 100d is supplied from the battery system 711 to the power conversion unit 601.

Further, the main control unit 300 calculates a rotational force (command torque) to be transmitted to the drive wheels 603 based on the given operation amount of the accelerator pedal 604a, and outputs a control signal based on the command torque to the power conversion unit 601. To give.

The power conversion unit 601 that has received the control signal converts the power supplied from the battery system 711 into power (drive power) necessary to drive the drive wheels 603. As a result, the driving power converted by the power converter 601 is supplied to the motor 602, and the rotational force of the motor 602 based on the driving power is transmitted to the driving wheels 603.

On the other hand, when the electric automobile 600 is decelerated based on the brake operation, the motor 602 functions as a power generator. In this case, the power conversion unit 601 converts the regenerative power generated by the motor 602 into power suitable for charging the battery modules 100a to 100d and supplies the power to the battery modules 100a to 100d. Thereby, the battery modules 100a to 100d are charged.

(2) Effects in Electric Vehicle Electric vehicle 600 that is an electric vehicle according to the present embodiment is rotated by the above-described battery system 711, motor 602 driven by electric power from battery system 711, and the rotational force of motor 602. Driving wheel 603 for carrying out the operation.

In this electric automobile 600, the motor 602 is driven by the electric power from the battery system 711. When the driving wheel 603 rotates by the rotational force of the motor 602, the electric automobile 600 moves.

For this electric vehicle, a battery system 711 including the battery unit 500 of FIG. 11 is used. As described above, in the battery system 711, the service plug 510 in FIG. 11 is automatically turned on in conjunction with the accommodating operation in which the battery unit 500 is accommodated in the battery rack 750, and the battery unit 500 is removed from the battery rack 750. The service plug 510 in FIG. 11 is automatically turned off in conjunction with the take-out operation. Thereby, workability at the time of assembling and maintaining the battery system 711 and replacing the battery unit 500 is improved while ensuring safety. Therefore, the work efficiency of assembling the electric vehicle 600 and the work efficiency of replacing the battery unit 500 are improved. Thereby, the manufacturing cost of the electric vehicle 600 is reduced, and the operation cost of the electric vehicle 600 is also reduced.

[3-3] Configuration and Operation of Other Mobile Body (1) Configuration The battery system 711 may be mounted on another mobile body such as a ship, an aircraft, an elevator, or a walking robot.

A ship equipped with the battery system 711 includes, for example, a hull instead of the vehicle body 610 in FIG. 12, a screw instead of the driving wheel 603, an acceleration input unit instead of the accelerator device 604, and a brake device 605. Instead, a deceleration input unit is provided. The driver operates the acceleration input unit instead of the accelerator device 604 when accelerating the hull, and operates the deceleration input unit instead of the brake device 605 when decelerating the hull. In this case, the hull corresponds to the moving main body, the motor corresponds to the power source, and the screw corresponds to the drive unit. The ship does not have to include a deceleration input unit. In this case, when the driver operates the acceleration input unit to stop the acceleration of the hull, the hull is decelerated due to the resistance of water. In such a configuration, the motor receives electric power from the battery system 711 and converts the electric power into power, and the hull moves by rotating the screw with the converted power.

An aircraft equipped with the battery system 711 includes, for example, a fuselage instead of the vehicle body 610 in FIG. 12, a propeller instead of the driving wheel 603, an acceleration input unit instead of the accelerator device 604, and a brake device 605. Instead, a deceleration input unit is provided. Ships and aircraft do not have to include a deceleration input unit. In this case, when the driver operates the acceleration input unit to stop acceleration, the airframe is decelerated due to water resistance or air resistance.

The elevator equipped with the battery system 711 includes, for example, a saddle instead of the vehicle body 610 in FIG. 12, a lifting rope attached to the saddle instead of the driving wheel 603, and an acceleration input unit instead of the accelerator device 604. And a deceleration input unit instead of the brake device 605.

The walking robot equipped with the battery system 711 includes, for example, a torso instead of the vehicle body 610 in FIG. 12, a foot instead of the driving wheel 603, an acceleration input unit instead of the accelerator device 604, and a brake device 605. A deceleration input unit is provided instead of.

In these moving bodies, the motor corresponds to the power source, the hull, the fuselage, the anchor and the trunk correspond to the moving main body, and the screw, the propeller, the lifting rope and the foot correspond to the driving section. The power source receives electric power from the battery system 711 and converts the electric power into motive power, and the drive unit moves the moving main body portion with the motive power converted by the power source.

(2) Effects in Other Moving Body The moving body according to the present embodiment is configured to move the moving main body unit from the battery system 711, the moving main body unit, and the power from the battery cell 10 of the battery system 711. A power source that converts power into power and a drive unit that moves the moving main body by the power converted by the power source are provided.

In this moving body, the electric power from the battery system 711 is converted into power by a power source, and the drive unit moves the moving main body by the power.

Since the battery system 711 including the battery unit 500 of FIG. 11 is used for this moving body, the workability at the time of assembling and maintaining the battery system 711 and replacing the battery unit 500 is improved while ensuring safety. . Therefore, the work efficiency of assembling the moving body and the work efficiency of replacing the battery unit 500 are improved. Thereby, the manufacturing cost of the moving body is reduced and the operation cost of the moving body is also reduced.

(3) Modified Example of Moving Body In the electric vehicle 600 of FIG. 12 or another moving body, instead of providing each battery unit 500 with a battery ECU 101 (FIG. 11), the main control unit 300 has the same function as the battery ECU 101. You may have. In this case, the battery system 711 according to the first or second embodiment can be used as the battery system 711 of FIG.

DESCRIPTION OF SYMBOLS 10 Battery cell 10B Low potential electrode 10A High potential electrode 20,766 Detection circuit 50 FPC board 80 Rotating

member

80g, 90g Fixed groove 81 Long shaft part 82 Short shaft part 89 Support shaft 90 Slide member 91 Main body part 92

Metal plates

92a, 92b

End face frame

100a, 100b, 100c, 100d Battery module 101 Battery ECU
DESCRIPTION OF SYMBOLS 300 Main control part 500 Battery unit 510

Service plug

510A,

511A 1st terminal

510B, 511B 2nd terminal 510C Terminal support part 511 HV connector 512 Contactor 550

Case

550a, 550c Side surface part 550b Rear surface part 550d Front surface part 590 Cover part 591 592 Vent 610 Car body 601 Power converter 602 Motor 603 Drive wheel 604 Accelerator device 605 Brake device 606 Rotational speed sensor 700 Power supply device 710 Power storage device 711 Battery system 712 System controller 720 Power converter 721 DC / DC converter 722 DC /

AC Inverter

721a, 721b, 722a, 722b Input / output terminal 750

Battery rack

751, 752 Side surface portion 753 Top surface portion 754 Bottom surface portion 7 5 Rear part 756 Partition part 757 Housing space 758a Sliding surface 758b Abutting surface 761 Cooling fan 762 Ventilation hole 763 Communication connecting part 764 On / off switching part 765

Power connecting part

764A,

765A Third terminal

764B, 765B Fourth terminal B Bus bar CC Communication connection part D21 to D24, D25a, D25b, D26a, D26b Power line p1 First position p2 Second position P21 to P25 Communication line PU1, PU2 Power output part R1 Air passage T1, T2 Module row TM Relay member

Claims

A battery unit including one or more battery cells and an external connector connected to the outside;
A container configured to accommodate the battery unit; and
With a connection function unit,
In the state where the battery unit is accommodated in the container, the one or more battery cells, the external connector, and the connection function unit are connected in series,
The said connection function part is a battery system comprised so that the said serial connection may be cut | disconnected in connection with the extraction operation | movement from which the said battery unit is taken out from the said container.
The battery system according to claim 1, wherein the connection function unit is configured to form the series connection in conjunction with a housing operation in which the battery unit is housed in the housing body.
The connection function unit
A contacted portion provided in the battery unit;
The battery system according to claim 1, further comprising: a contact member that forms or disconnects the series connection by being brought into contact with the contacted part or being separated from the contacted part.
The contacted portion includes first and second terminals provided in the battery unit so as to be separated from each other,
The contact member electrically connects the first terminal and the second terminal by contacting the first and second terminals in a state where the battery unit is accommodated in the container. The battery system according to claim 3, which is a conductive member provided in the container.
A fixing mechanism capable of switching between a fixed state in which the battery unit is fixed to the container and a release state in which the battery unit can be removed from the container in a state where the battery unit is disposed in the container; ,
The accommodating operation includes a first switching operation in which the fixing mechanism is switched from the released state to the fixed state,
The take-out operation includes a second switching operation in which the fixing mechanism is switched from the fixed state to the released state,
The connection function unit is configured to form the series connection in conjunction with the first switching operation in the accommodating operation and to disconnect the series connection in conjunction with the second switching operation in the take-out operation. The battery system according to any one of claims 1 to 4, wherein:
A detection circuit for detecting information relating to the one or more battery cells;
A cooling device for cooling the battery unit in a state in which the battery unit is accommodated in the container;
A communication control unit that is electrically connected to the detection circuit in a state in which the battery unit is accommodated in the container and is connected to an external device, and performs communication between the detection circuit and the external device; Prepared,
The battery system according to any one of claims 1 to 5, wherein the cooling device and the communication control unit are provided in the container.
The battery system according to any one of claims 1 to 6,
A motor driven by power from the battery system;
An electric vehicle comprising drive wheels that are rotated by the rotational force of the motor.
The battery system according to any one of claims 1 to 6,
A moving body,
A power source that converts electric power from the battery system into power for moving the moving main body;
A moving body comprising: a drive unit that moves the moving main body unit by power converted by the power source.
The battery system according to any one of claims 1 to 6,
And a system control unit that performs control related to charging or discharging of the battery cell of the battery system.
Can be connected to the outside,
The power storage device according to claim 9,
A power supply device comprising: a power conversion device that is controlled by the system control unit of the power storage device and performs power conversion between the battery cell of the battery system of the power storage device and the outside.
Configured to be accommodated in a container,
One or more battery cells;
An external connector connected to the outside;
With a connection function unit,
In the state where the battery unit is accommodated in the container, the one or more battery cells, the external connector, and the connection function unit form a series connection,
The connection function unit is a battery unit configured to disconnect the series connection in conjunction with an extraction operation in which the battery unit is extracted from the container.
One or a plurality of battery cells, configured to accommodate a battery unit including an external connector connected to the outside and a contacted portion,
A contact member that contacts the contacted part in a state where the battery unit is accommodated in the container;
In the state where the battery unit is housed in the housing body, the one or more battery cells, the external connector, the contacted portion, and the contact member form a series connection,
The contact member is configured to disconnect the series connection by being separated from the contacted portion of the battery unit in conjunction with an extraction operation in which the battery unit is extracted from the container. Container.