Power storage device and power storage system

Abstract

To provide a power storage device and a power storage system.SOLUTION: A power storage device 10 comprises: a first unit 200 having storage batteries 202a to 202d; and a second unit 100 that outputs power of the storage batteries to outside. The second unit can be attached to and detached from the first unit, and the first unit further comprises first connection parts 241 and 242 for supplying the power of the storage batteries to the second unit. The second unit further comprises: a second connection part 141 for receiving the power supplied from the first connection part; and a third connection part 130 for outputting the power received via the second connection part to the outside.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a power storage device and a power storage system.

Background Art

[0002] In recent years, when a secondary battery mounted on an automobile deteriorates, it has been studied to reuse the secondary battery as a stationary secondary battery (for example, Patent Document 1). Further, when increasing or decreasing the number of battery modules constituting a battery pack mounted on a vehicle, in accordance with the increase or decrease of the battery modules, a technique is known in which a dummy module or the like is installed in the battery pack to prevent deterioration of the weight balance of the battery pack (for example, Patent Documents 2 to 3). (Prior Art Documents) (Patent Documents) (Patent Document 1) Japanese Patent Application Laid-Open No. 2013-218909 (Patent Document 2) Japanese Patent No. 6304426 (Patent Document 3) Japanese Patent No. 5208653

Summary of the Invention

Means for Solving the Problems

[0003] In a first aspect of the present invention, a power storage device is provided. The power storage device includes a first unit including a storage battery, and a second unit that outputs the power of the storage battery to the outside. The second unit is detachable from the first unit. The first unit further includes a first connection portion for supplying the power of the storage battery to the second unit. The second unit further includes a second connection portion for receiving the power supplied from the first connection portion, and a third connection portion for outputting the power received through the second connection portion to the outside.

[0004] The above power storage device may further include a first cable that connects the first connection portion and the second connection portion and is detachable from the first connection portion and the second connection portion.

[0005] In any of the above-described power storage devices, at least one of the first connection portion, the second connection portion, and the third connection portion may be a connector.

[0006] In any of the above-described power storage devices, the second unit may further include a control circuit for controlling the storage battery, and a fourth connection portion for obtaining information about the storage battery from the first unit or outputting a signal for controlling the storage battery to the first unit. The first unit may further include a fifth connection portion for outputting information about the storage battery to the fourth connection portion or obtaining a signal output from the second unit through the fourth connection portion.

[0007] Any of the above-described power storage devices may further include a second cable that connects the fourth connection portion and the fifth connection portion and is detachable from the fourth connection portion and the fifth connection portion.

[0008] In any of the above-described power storage devices, at least one of the fourth connection portion and the fifth connection portion may be a connector.

[0009] Any of the above-described power storage devices may further include a third unit for adjusting at least one of the center of gravity and the mass of the power storage device. The third unit may be detachable from at least one of the first unit and the second unit.

[0010] Any of the above-described power storage devices may further include a first sealing material provided between the housing of the first unit and the housing of the second unit to suppress the inflow of moisture into the first unit.

[0011] In any of the above-described power storage devices, the first unit may include a first housing that is detachable from the second unit, and a second housing that is detachable from the first housing. The second housing may include a bottom portion on which the storage battery is installed, and a wall portion that stands up from the bottom portion and surrounds the storage battery.

[0012] Any of the above-described power storage devices may further include a second sealing member provided between the first housing and the second housing to suppress the inflow of moisture into the second unit.

[0013] In any of the above-described power storage devices, the second unit may further include a control circuit for controlling the storage battery, and a fourth connection portion for acquiring a signal for controlling the storage battery from the storage battery or outputting the signal to the storage battery. The first unit may further include a fifth connection portion for outputting information regarding the storage battery to the fourth connection portion or acquiring a signal output from the second unit through the fourth connection portion. The second unit may further include a second cable that connects the fourth connection portion and the fifth connection portion and is detachable from the fourth connection portion and the fifth connection portion. The first unit may include a first housing that is detachable from the first unit, and a second housing that is detachable from the first housing. The second housing may include a bottom portion on which the storage battery is installed, and a wall portion that stands upright from the bottom portion and surrounds the storage battery. The power storage device may include a first sealing member provided between the housing of the first unit and the housing of the second unit to suppress the inflow of moisture into the housing of the first unit, a second sealing member provided between the first housing and the second housing to suppress the inflow of moisture into the second unit, and a third unit for adjusting the mass. The third unit may be detachable from the first housing.

[0014] In a second aspect of the present invention, a power storage system is provided. The power storage system includes a plurality of any of the above-described power storage devices.

[0015] Note that the above summary of the invention does not list all the necessary features of the present invention. Also, sub-combinations of these feature groups can also be inventions.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0017] Hereinafter, the present invention will be described through embodiments, but the following embodiments do not limit the invention according to the claims. Not all combinations of features described in the embodiments are essential for the solution means of the invention. Also, the embodiments will be described with reference to the drawings, and in the description of the drawings, the same or similar parts may be given the same reference numerals and duplicate descriptions may be omitted.

[0018] FIG. 1 shows an example of a power storage device 10 according to an embodiment. The power storage device 10 includes a first unit 200, a second unit 100, and a third unit 400. In the present embodiment, the first unit 200 is provided between the second unit 100 and the third unit 400.

[0019] The first unit 200 includes a storage battery 202. Specifically, the storage battery 202 includes a storage battery 202a, a storage battery 202b, a storage battery 202c, and a storage battery 202d. Examples of the storage battery 202 include a lithium battery, a lithium-ion battery, a lithium-sulfur battery, a sodium-sulfur battery, a lead battery, a nickel-metal hydride battery, a nickel-cadmium battery, a redox flow battery, a metal-air battery, etc. The type of the lithium-ion battery is not particularly limited. Examples of the type of the lithium-ion battery include an iron phosphate type, a manganese type, a cobalt type, a nickel type, a ternary type, etc.

[0020] The first unit 200 includes a housing 210, an upper member 300, a first connection part 241, a first connection part 242, a fifth connection part 243, a wire 261, and a wire 262. The housing 210 provides a bottom part 230 and a wall part 240. The upper member 300 covers the upper part of the housing 210. The storage battery 202 is accommodated in a space surrounded by the housing 210 and the upper member 300. Specifically, the storage battery 202 is installed on the bottom part 230 of the housing 210. The wall part 240 surrounds the periphery of the storage battery 202.

[0021] The storage batteries 202a, 202b, 202c, and 202d are connected in series. In the storage battery 202 including the storage batteries 202a, 202b, 202c, and 202d connected in series, the positive electrode terminal is connected to the first connection part 241 through the wire 261, and the negative electrode terminal is connected to the first connection part 242 through the wire 262. The first connection part 241 and the first connection part 242 are connection parts for supplying the power stored in the storage battery 202 to the second unit 100.

[0022] The fifth connection part 243 is used to receive a signal for controlling the storage battery 202 from the second unit 100 or output information about the storage battery 202 to the second unit 100. As an example, the signals received by the first unit 200 from the second unit 100 are signals for instructing each discharge of the storage battery 202, signals for instructing each charge of the storage battery 202, and the like. The signals output by the first unit 200 to the second unit 100 are the voltage between the terminals of the storage battery 202, the temperature, and the like. The second unit 100 generates a signal for controlling the storage battery 202 based on the information about the storage battery 202 obtained from the first unit 200.

[0023] The first connection part 241 may be a connector. The first connection part 242 may be a connector. The fifth connection part 243 may be a connector. At least any one of the first connection part 241, the first connection part 242, and the fifth connection part 243 may be a connector. The first connection part 241, the first connection part 242, and the fifth connection part 243 may all be connectors.

[0024] The first connection part 241, the first connection part 242, and the fifth connection part 243 penetrate the upper member 300. The connection terminals of the first connection part 241, the first connection part 242, and the fifth connection part 243 are located outside the upper member 300.

[0025] The second unit 100 outputs the electric power stored in the storage battery 202 to the outside. The second unit 100 includes an input / output circuit 120, a control circuit 122, a third connection part 130, a second connection part 141, a second connection part 142, a fourth connection part 143, a sixth connection part 132, a seventh connection part 134, a first cable 151, a first cable 152, a second cable 153, and a housing 110. At least the input / output circuit 120, the control circuit 122, the second connection part 141, the second connection part 142, the fourth connection part 143, the first cable 151, the first cable 152, and the second cable 153 may be provided inside the housing 110.

[0026] The third connection part 130 may be a connector. The second connection part 141 may be a connector. The second connection part 142 may be a connector. The fourth connection part 143 may be a connector. The sixth connection part 132 may be a connector. The seventh connection part 134 may be a connector. At least any one of the third connection part 130, the second connection part 141, the second connection part 142, the fourth connection part 143, the sixth connection part 132, and the seventh connection part 134 may be a connector. All of the third connection part 130, the second connection part 141, the second connection part 142, the fourth connection part 143, the sixth connection part 132, and the seventh connection part 134 may be connectors. At least any one of the first connection parts 241 and 242, the fifth connection part 243, the third connection part 130, the second connection part 141, the second connection part 142, the fourth connection part 143, the sixth connection part 132, and the seventh connection part 134 may be a connector. As a connection method between the first connection parts 241 and 242, the fifth connection part 243, the third connection part 130, the second connection part 141, the second connection part 142, the fourth connection part 143, the sixth connection part 132, and the seventh connection part 134 and other members, in addition to the connection method by a connector, a connection method of press connection with a connection member such as a screw, a connection method by soldering, a connection method by welding such as laser welding, etc. can be applied.

[0027] The first cable 151 connects the first connection part 241 and the second connection part 141. The first cable 152 connects the first connection part 242 and the second connection part 142. Thereby, the second connection part 141 and the second connection part 142 receive the power supplied from the first connection part 241 and the first connection part 242. The third connection part 130 outputs the power received through the second connection part 141 and the second connection part 142 to the outside. The input / output circuit 120 converts the power received through the second connection part 141 and the second connection part 142 into the power to be output to the outside.

[0028] The input / output circuit 120 converts the power received from the outside through the third connection part 130 or the sixth connection part 132 into power for charging the storage battery 202, and supplies the power to the storage battery 202 through the second connection parts 141 and 142, the first cables 151 and 152, the first connection parts 241 and 242, and the electric wires 261 and 262, thereby charging the storage battery 202. The input / output circuit 120 controls the charging and discharging of the storage battery 202 based on the signal received from an external control device through the seventh connection part 134.

[0029] The control circuit 122 controls the storage battery 202. The fourth connection part 143 is a connection part for acquiring a signal regarding the storage battery 202 from the storage battery 202 or outputting a signal for controlling the storage battery 202 to the storage battery 202. For example, the control circuit 122 acquires a signal indicating the inter-terminal voltage, temperature, etc. of the storage battery 202 through the fourth connection part 143. The control circuit 122 controls the storage battery 202 based on the signal acquired through the fourth connection part 143. The control circuit 122 outputs a signal instructing each discharge of the storage battery 202, a signal instructing each charge of the storage battery 202, etc. through the fourth connection part 143. The input / output circuit 120 transmits a signal to an external control device through the seventh connection part 134 based on the information of the storage battery 202 acquired through the control circuit 122.

[0030] The second cable 153 connects the fourth connection part 143 and the fifth connection part 243. Thereby, the control circuit 122 exchanges signals with the storage battery 202 through the fourth connection part 143, the second cable 153, and the fifth connection part 243.

[0031] In this embodiment, the second unit 100 is detachable from the first unit 200. The first cable 151 is detachable from the first connection part 241 and the second connection part 141. The second cable 153 is detachable from the fourth connection part 143 and the fifth connection part 243. Thereby, compared with the case where the input / output circuit or the control circuit and the storage battery are provided integrally, the cost of separating the first unit 200 and the second unit 100 can be reduced. Further, since the second unit 100 including the control device can be easily separated from the first unit 200 including the storage battery, the safety at the time of reusing (which may be called secondary use, etc.) or disassembling the second unit 100 can be enhanced. Therefore, it becomes easy to reuse at least one of the first unit 200 and the second unit 100 for another purpose from the used power storage device 10 used for a certain purpose. For example, when reusing the first unit 200 of the power storage device 10 used in a forklift as a power supply unit for an emergency power source such as a data center, it becomes possible to easily reuse the second unit 100 removed from the power storage device 10 by combining it with a second unit suitable for the emergency power source.

[0032] Also, by standardizing the first unit 200 and the second unit 100, the mass production effect per unit can be enhanced, so that the cost of the storage battery 10 can be reduced. By standardizing the units, even when reusing, the cost required for redesigning the necessary functions can be reduced. Also, by combining the units for use, it becomes possible to operate in an optimal combination for the usage purpose. Also, by standardizing the units, it becomes easy to introduce small lots. Further, for small-lot customers, it becomes possible to select and use only the necessary units, so that the introduction cost can be reduced. Also, by replacing only the units that have reached the end of their life or the malfunctioning units, the maintenance cost can also be reduced. Since it takes an enormous amount of time and cost to redesign the functions necessary for reuse.

[0033] In addition, the first unit 200 and the second unit 100 can be manufactured by different manufacturers, and the power storage device 10 can be manufactured by assembling the units manufactured by different manufacturers. As a result, since it becomes possible to manufacture the first unit 200 and the second unit 100 in parallel, the manufacturing can be made efficient. Further, since the power storage device 10 can be manufactured by assembling the units, the manufacturing of the power storage device 10 becomes easy, and it can be manufactured safely and efficiently. Furthermore, even when a unit that has reached the end of its life or a unit has failed, the unit can be replaced or repaired on-site, so that the transportation cost can be reduced.

[0034] In the present embodiment, the third unit 400 is a member for adjusting at least one of the center of gravity and the mass of the power storage device 10. For example, when the power storage device 10 is used as a power supply device of a vehicle, since the vehicle may be designed in consideration of the position of the center of gravity and the mass of the power supply device, by adjusting at least one of the center of gravity and the mass of the power storage device 10 using the third unit 400, it may be possible to adapt to the design of the vehicle in which the power storage device 10 is used.

[0035] In the present embodiment, the third unit 400 is detachable from the first unit 200. In other embodiments, the third unit 400 may be detachable from the second unit 100. In other embodiments, it may be detachable from the first unit 200 and the second unit 100. Thereby, at least one of the center of gravity and the mass can be adjusted according to the use of reuse.

[0036] FIG. 2 is a schematic perspective view showing a state in which the first unit 200, the second unit 100, and the third unit 400 are separated. FIG. 2 is a diagram for explaining the coupling relationship between the units, and among the components included in the second unit 100, the display of the input / output circuit 120, the control circuit 122, the third connection portion 130, and the sixth connection portion 160 is omitted.

[0037] The housing 110 of the second unit 100 is formed with a plurality of mounting holes including mounting holes 114a and 114b. In the description of the present embodiment, for the purpose of preventing the description from becoming complicated, when a plurality of mounting holes and mounting members are provided for mounting a plurality of members, there may be a case where only some of the mounting holes or some of the mounting members are taken up and the structure for mounting the plurality of members is described.

[0038] The first unit 200 includes a first housing 310, a second housing 320, a first sealing member 330, a second sealing member 340, and an upper member 300. The upper member 300 includes a mounting portion 302a, a mounting portion 302b, and a plate portion 220. The mounting portions 302a and 302b are fixed to the plate portion 220 by welding, brazing, or the like. The mounting portions 302a and 302b protrude from the plate portion 220 on the side opposite to the bottom portion 230 in the assembling direction of the first unit 200 and the second unit 100. The mounting portions 302a and 302b are members for attaching the housing 110 of the second unit 100 to the first unit 200. A plurality of mounting holes including mounting holes 304a and 304b are formed at the top of the mounting portion 302a. Similarly, a plurality of mounting holes are formed at the top of the mounting portion 302b.

[0039] As an example, the housing 110 of the second unit 100 is attached to the mounting portions 302a and 302b of the first unit 200 using a plurality of mounting members including mounting members 188a and 188b. Specifically, the mounting members 188a and 188b are fastening members such as bolts. By inserting the mounting member 188a into the mounting holes 114a and 304a and inserting the mounting member 188b into the mounting holes 114b and 304b, the housing 110 of the second unit 100 is attached to the mounting portions 302a and 302b. The mounting members 188a and 188b may attach the housing 110 to the mounting portions 302a and 302b by using receiving members such as nuts.

[0040] When the housing 110 of the second unit 100 is attached to the attachment portions 302a and 302b, the first connection portion 241 and the fifth connection portion 243 can be accessed from the second unit 100 side through the opening 116 formed in the housing 110. Similarly, the first connection portion 242 can be accessed from the second unit 100 side through the opening 118 provided in the housing 110. Thereby, the first cable 151 can connect the first connection portion 241 and the second connection portion 141 through the opening 116, and the second cable 153 can connect the fifth connection portion 243 and the fourth connection portion 143 through the opening 116. Similarly, the first cable 152 can connect the first connection portion 242 and the second connection portion 142 through the opening 118.

[0041] The upper member 300 is attached to the first housing 310 by a plurality of attachment members including the attachment members 308a and 308b. The upper member 300 is attached to the first housing 310 via the first sealing material 330. The attachment structure between the upper member 300 and the first housing 310 will be described in relation to FIG. 3.

[0042] The first housing 310 is attached to the second housing 320 by a plurality of attachment members including the attachment members 318a and 318b. The first housing 310 is attached to the second housing 320 via the second sealing material 340. The attachment structure between the first housing 310 and the second housing 320 will be described in relation to FIG. 3.

[0043] The second housing 320 is formed with a plurality of mounting holes including a mounting hole 324a and a mounting hole 324b. The third unit 400 is formed with a plurality of mounting holes including a mounting hole 404a and a mounting hole 404b. As an example, the second housing 320 is attached to the third unit 400 using a plurality of mounting members including a mounting member 328a and a mounting member 328b. Specifically, the mounting members 328a and 328b are fastening members such as bolts. By inserting the mounting member 328a into the mounting hole 324a and the mounting hole 404a, and inserting the mounting member 188b into the mounting hole 324b and the mounting hole 404b, the second housing 320 is attached to the third unit 400. The mounting members 328a and 328b may attach the second housing 320 to the third unit 400 by using a receiving member such as a nut.

[0044] As described in relation to FIG. 2 and the like, the second unit 100 is attached to the first housing 310 by a plurality of mounting members including a mounting member 188a and a mounting member 188b. Conversely, the second unit 100 can be removed from the first housing 310 by removing a plurality of mounting members including the mounting member 188a and the mounting member 188b. Thus, the second unit 100 is detachable from the first housing 310.

[0045] Thereby, by removing the mounting members such as the mounting member 188a and the mounting member 188b, and simply removing the first cable 151, the first cable 152, and the second cable 153 from the first connection portion 241, the first connection portion 242, and the fifth connection portion 243 respectively, the first unit 200 including the battery and the second unit 100 including the control device can be obtained. The removed first unit 200 and second unit 100 can be easily combined with other units and used by other appropriate customers. Since the first unit 200 and the second unit 100 can each be controlled by a connection interface, the labor for redesign during reuse can be saved.

[0046] FIG. 3 is a schematic exploded perspective view of the first unit 200. FIG. 3 is a diagram for explaining the connection relationship between members. In FIG. 3, among the components included in the second housing 320 of the first unit 200, the upper member 300, the first sealing member 330, the first housing 310, the second sealing member 340, the storage battery 202, and the second housing 320 are schematically shown in a separated state.

[0047] A plurality of mounting holes including mounting holes 306a and 306b are formed in the upper member 300. A plurality of mounting holes including mounting holes 336a and 336b are formed in the first sealing member 330. A plurality of mounting holes including mounting holes 314a and 314b are formed in the first housing 310. As an example, the upper member 300 is attached to the first housing 310 with the first sealing member 330 sandwiched therebetween using a plurality of mounting members including mounting members 308a and 308b. Specifically, the mounting members 308a and 308b are fastening members such as bolts. By inserting the mounting member 308a into the mounting holes 306a, 336a, and 314a and inserting the mounting member 308b into the mounting holes 306b, 336b, and 314b, the upper member 300 is attached to the first housing 310. The mounting members 308a and 308b may attach the upper member 300 to the first housing 310 by using a receiving member such as a nut.

[0048] The first sealing member 330 is pressed against the first housing 310 by the force for attaching the upper member 300 to the first housing 310, and seals the gap between the upper member 300 and the first housing 310. Thereby, the inflow of moisture from the outside of the first unit 200 into the first unit 200 is suppressed. Thus, the first sealing member 330 is provided between the housing 210 of the first unit 200 and the housing 110 of the second unit 100, and suppresses the inflow of moisture into the first unit 200. The first sealing member 330 may be a packing, a gasket, or the like.

[0049] The first housing 310 is formed with a plurality of mounting holes including a mounting hole 316a and a mounting hole 316b. The second sealing member 340 is formed with a plurality of mounting holes including a mounting hole 346a and a mounting hole 346b. The second housing 320 is formed with a plurality of mounting holes including a mounting hole 324a and a mounting hole 324b. As an example, the first housing 310 is attached to the second housing 320 with the second sealing member 340 sandwiched therebetween using a plurality of mounting members including a mounting member 318a and a mounting member 318b. Specifically, the mounting members 318a and 318b are fastening members such as bolts. By inserting the mounting member 318a into the mounting hole 316a, the mounting hole 346a, and the mounting hole 326a, and inserting the mounting member 318b into the mounting hole 316b, the mounting hole 346b, and the mounting hole 326b, the first housing 310 is attached to the second housing 320. The mounting members 318a and 318b may attach the first housing 310 to the second housing 320 by using a receiving member such as a nut.

[0050] The second sealing member 340 is pressed against the second housing 320 by the force for attaching the first housing 310 to the second housing 320, and seals the gap between the first housing 310 and the second housing 320. Thereby, the inflow of moisture from outside the first unit 200 into the first unit 200 is suppressed. Thus, the first sealing member 330 is provided between the first housing 310 and the second housing 320 and suppresses the inflow of moisture into the first unit 200. The second sealing member 340 may be a packing, a gasket, or the like.

[0051] As described in relation to FIG. 3, the first housing 310 is attached to the second housing 320 by a plurality of mounting members including a mounting member 318a and a mounting member 318b. Conversely, the first housing 310 can be removed from the second housing 320 by removing a plurality of mounting members including the mounting member 318a and the mounting member 318b. Thus, the first housing 310 is detachable from the second housing 320.

[0052] As shown in FIG. 3, the second housing 320 is a housing attached to the third unit 400. That is, as schematically shown in FIG. 1, the second housing 320 provides at least a part of a bottom portion 230 on which the storage battery 202 is installed and a wall portion 240 that stands up from the bottom portion 230 and surrounds the storage battery 202. With the structure having the bottom portion 230 and the wall portion 240, when the storage battery 202 is a battery that uses a liquid such as an electrolyte inside, it is possible to suppress the electrolyte leaked from the storage battery 202 from flowing out to the outside.

[0053] FIG. 4 shows the functional configuration of the power storage system 500. The power storage system 500 includes n power storage devices including the power storage device 10-1, the power storage device 10-2, and the power storage device 10-n, and a control device 510. Each of the n power storage devices including the power storage device 10-1, the power storage device 10-2, and the power storage device 10-n has the same configuration as the power storage device 10 described in relation to FIGS. 1 to 3. The n power storage devices including the power storage device 10-1, the power storage device 10-2, and the power storage device 10-n are connected in parallel, for example. The control device 510 controls the charging and discharging of each of the n power storage devices including the power storage device 10-1, the power storage device 10-2, and the power storage device 10-n.

[0054] The power storage system 500 is electrically connected to a load device and can supply power to the load device. The power storage system 500 is electrically connected to a charging device and can store electrical energy. The power storage system 500 is used, for example, in power storage devices, electrical equipment, transportation equipment, and the like. Examples of the transportation equipment include electric vehicles, hybrid vehicles, electric motorcycles, railway vehicles, airplanes, elevators such as forklifts, and work machines such as cranes.

Description of Reference Numerals

[0055] 10 Power storage device 100 Second unit 110 Housing 116 Opening 118 Opening 120 Input / output circuit 141 Second connection portion 114 Mounting hole 122 Control Circuit 130 Third Connection Part 132 Sixth Connection Part 134 Seventh Connection Part 142 Second Connection Part 143 Fourth Connection Part 151 First Cable 152 First Cable 153 Second Cable 160 Sixth Connection Part 188, 308, 318 Mounting Member 202 Storage Battery 200 First Unit 210 Housing 220 Plate Part 230 Bottom Part 240 Wall Part 241, 242 First Connection Part 243 Fifth Connection Part 261, 262 Electric Wire 300 Upper Member 302 Mounting Part 330 First Sealing Material 340 Second Sealing Material 400 Third Unit 310 First Housing 320 Second Housing 304, 306, 314, 316, 324, 326, 336, 346, 404 Mounting Hole 328 Mounting Member 500 Energy Storage System 510 Control Device

Claims

1. A first unit including a storage battery, A second unit for outputting the power of the storage battery to the outside, Comprising, The second unit is detachable from the first unit, The first unit, A first connection part for supplying the power of the storage battery to the second unit Further comprising, The second unit, A second connection part for receiving the power supplied from the first connection part, A third connection part for outputting the power received through the second connection part to the outside, A power storage device further comprising.

2. A first cable that connects the first connection part and the second connection part and is detachable from the first connection part and the second connection part The power storage device according to claim 1, further comprising.

3. At least one of the first connection part, the second connection part, and the third connection part is a connector The power storage device according to claim 1 or 2.

4. The second unit, A control circuit for controlling the storage battery, A fourth connection part for acquiring information about the storage battery from the first unit or outputting a signal for controlling the storage battery to the first unit, Further comprising, The first unit, A fifth connection part for outputting information about the storage battery to the fourth connection part or acquiring a signal output from the second unit through the fourth connection part The power storage device according to claim 1 or 2, further comprising.

5. A second cable that connects the fourth connection part and the fifth connection part and is detachable from the fourth connection part and the fifth connection part The power storage device according to claim 4, further comprising.

6. At least one of the fourth connection part and the fifth connection part is a connector The power storage device according to claim 4.

7. A third unit for adjusting at least one of the center of gravity and the mass of the power storage device Further comprising, The third unit is detachable from at least one of the first unit and the second unit The power storage device according to claim 1 or 2.

8. A first sealing material provided between the housing of the first unit and the housing of the second unit to suppress the inflow of moisture into the first unit The power storage device according to claim 1 or 2, further comprising.

9. The first unit, A first housing that is detachable from the second unit, A second housing that is detachable from the first housing Further comprising, The second housing, A bottom on which the storage battery is installed, A wall portion that stands upright from the bottom and surrounds the storage battery, and The power storage device according to claim 1 or 2, comprising the same.

10. A second sealing material provided between the first housing and the second housing to suppress the inflow of moisture into the second unit The power storage device according to claim 9, further comprising the same.

11. The second unit A control circuit for controlling the storage battery, A fourth connection portion for obtaining a signal for controlling the storage battery from the storage battery or outputting the signal to the storage battery, Further comprising, The first unit A fifth connection portion for outputting information about the storage battery to the fourth connection portion or obtaining a signal output from the second unit through the fourth connection portion Further comprising, The second unit A second cable that connects the fourth connection portion and the fifth connection portion and is detachable from the fourth connection portion and the fifth connection portion Further comprising, The first unit A first housing that is detachable from the first unit, A second housing that is detachable from the first housing Comprising, The second housing A bottom portion on which the storage battery is installed, A wall portion that stands upright from the bottom and surrounds the storage battery, and Comprising, The power storage device A first sealing material provided between the housing of the first unit and the housing of the second unit to suppress the inflow of moisture into the housing of the first unit, A second sealing material provided between the first housing and the second housing to suppress the inflow of moisture into the second unit, A third unit for adjusting the mass, Further comprising, The third unit is detachable from the first housing The power storage device according to claim 2.

12. A power storage system including a plurality of the power storage devices according to claim 1 or 2.

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