JP2017195666A - Micro Battery and Power Storage Device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power storage device capable of changing the discharge capacity easily, and to provide a micro battery constituting the power storage device.SOLUTION: A micro battery 10X constituting one power storage device 1X by being connected electrically via a common power line 30 includes a battery module 11, a power converter 12, and a connection freely connectable with the connected part of other micro battery 10X or a base. A state where multiple micro batteries 10X are mutually connected electrically is brought about, by connecting the connection with the connected part of other micro battery 10X, or connecting respective connection of the multiple micro batteries with multiple connected parts of the base, respectively.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a micro battery having a battery module that charges and discharges DC power, and a power storage device including the micro battery.

  In recent years, as a result of the widespread use of various types of electric equipment, electric power is required in various places and scenes, and a power supply device that can supply electric power independently of a commercial power system is required.

  For example, Patent Document 1 proposes a trunk-type portable solar power generation device including a solar battery cell and a storage battery. This portable solar power generation device can increase the load (use electric devices with large power consumption) by supplying not only the power charged in the storage battery but also the power generated by the solar cells. It is to make.

JP 2002-238183 A

  However, the portable solar power generation apparatus proposed in Patent Document 1 can supply the required amount of electric power depending on the weather because the amount of electric power that can be supplied varies depending on the amount of solar radiation. There is a problem of disappearing.

  Even if it is a portable solar power generation device proposed by this point and patent documents 1, if a large-sized storage battery with as large a discharge capacity as possible is mounted, the electric energy which can be supplied can be increased. However, in this case, mounting the large storage battery unnecessarily increases the size of the device. Therefore, it becomes difficult to transport and move the device, and it becomes difficult to secure a space for installing the device.

  Moreover, even if it is a portable solar power generation device proposed by patent document 1, if a storage battery is changed and a discharge capacity is changed as needed, it will not lead to excessive enlargement of the device concerned, A desired amount of power can be supplied. However, in order to replace the storage battery in the device, a dangerous and troublesome work of disassembling and assembling the device is necessary, so that it is practically impossible.

  In view of the above, an object of the present invention is to provide a power storage device capable of easily changing the discharge capacity and a microbattery constituting the power storage device.

  In order to achieve the above object, the present invention provides a microbattery constituting one power storage device by being electrically connected via a common power line, the battery module charging and discharging DC power, DC power discharged from the battery module is converted into AC power or DC power different from the DC power and output to the power line, and power input from the power line is converted to DC power charged by the battery module. A converter and a connection part that is connectable to another connected part of the microbattery or the base, and connects the connecting part to the connected part included in the other microbattery, or And connecting each of the connection parts included in the plurality of microbatteries to each of the plurality of connected parts included in the base. And, a plurality of the micro battery through the power line to provide a microbattery, characterized in that in a state of being electrically connected to each other.

  According to this microbattery, a plurality of microbatteries are electrically connected via a common power line only by connecting a connection part included in the microbattery to a connected part included in another microbattery or a base. One power storage device can be obtained. Therefore, the number of battery modules included in the power storage device can be easily increased or decreased by increasing or decreasing the number of connected micro batteries. Therefore, the discharge capacity of the power storage device can be easily increased or decreased.

  Furthermore, in the power storage device obtained by connecting this micro battery, both the discharge capacity and power conversion capacity of the power storage device are both increased or decreased by increasing or decreasing the number of micro batteries including both the battery module and the power converter. Can be kept in conformity.

  In addition, the power storage device obtained by connecting the microbattery can be usually used by simply separating or replacing the microbattery including the battery module even if one battery module becomes unusable due to deterioration or failure. Street operation is possible. Therefore, the power storage device obtained by connecting the microbattery is easy to maintain and can be quickly restored.

  Further, the microbattery includes a first connection portion that is the connection portion, and forms a part of the power line with the first connection portion that is the connection portion, and the power converter is electrically The partial power line may be further connected to each of the first connecting portion and the first connected portion.

  In this microbattery, a plurality of microbatteries are electrically connected via a common power line only by connecting a first connection part included in a microbattery to a first connected part included in another microbattery. One power storage device can be obtained.

  Further, the microbattery includes a second connection portion that is the connection portion, and the second connection portion is electrically connected to the power converter, and the base is provided in the base. You may make it connect freely with respect to the 2nd to-be-connected part which is a connection part and is electrically connected with the said power line.

  In this microbattery, a plurality of microbatteries are electrically connected via a common power line only by connecting each of the second connection parts included in the plurality of microbatteries to each of the plurality of second connected parts included in the base. Can be obtained.

  In the microbattery described above, it is preferable that the battery module is detachable from the power converter.

  In this microbattery, a battery module that is mounted and used in an electric device that consumes DC power, such as an electric motorcycle, can be used as a power storage device, and a battery module provided in the power storage device is mounted in the electric device. Can be used. Therefore, the utilization factor of the battery module can be improved.

  In the power storage device obtained by connecting the microbattery, the power converter converts the power charged / discharged by the battery module and the power input / output to / from the power line (for example, conversion between DC power and AC power, DC power Therefore, a battery module suitable for use in an electric device can be used for a micro battery regardless of the state of power in the power line.

  Further, in the above microbattery, provided to be integral with the battery module, provided to be integral with the power converter, a third connection portion electrically connected to the battery module, A third connected portion that is electrically connected to the power converter and to which the third connecting portion is connectable, and the third connecting portion when the battery module and the power converter are separated. It is preferable to further include a shielding portion for shielding.

  In this microbattery, the third connection portion that may be discharged from the DC power because it is electrically connected to the battery module can be shielded by the shielding portion without being exposed. Therefore, the safety of the microbattery can be increased.

  In the above microbattery, it is preferable that the microbattery further includes a power acquisition unit for taking out the power of the power line or the power output from the power converter to the outside.

  In this microbattery, even if it is an independent microbattery that does not constitute a power storage device, electric power can be supplied to the electrical device.

  The microbattery may further include a photovoltaic unit that includes at least one photovoltaic element and charges the battery module with DC power obtained by power generation of the photovoltaic element.

  With this microbattery, the battery module can be charged even in places where there is no commercial power system such as outdoors.

  In the above microbattery, it is preferable to further include a display unit that displays a remaining capacity charged in the battery module.

  In this micro battery, select a micro battery with a large remaining capacity and remove it from the power storage device for use in another application, or incorporate a micro battery with a small remaining capacity into the power storage device for charging. Flexible use.

  The present invention is also a power storage device including a plurality of micro batteries that are electrically connected via a common power line, each of the micro batteries charging and discharging DC power, and the battery. Power conversion for converting DC power discharged from the module into AC power or DC power different from the DC power and outputting the DC power to the power line, and converting power input from the power line into DC power charged by the battery module A partial power line that is part of the power line and is electrically connected to the power converter, a first connected portion that is electrically connected to the partial power line, and the partial power line A first connecting portion that is electrically connected and is connectable to the first connected portion provided in the other microbattery; The micro battery is electrically connected to each other via the power line by connecting the first connecting part of the micro battery to the first connected part of the other micro battery. Provided is a power storage device characterized by being connected to each other.

  Moreover, this invention is an electrical storage apparatus provided with several microbatteries electrically connected via a common power line, Comprising: The said 2nd to-be-connected multiple said electric power line and the said electric power line A battery module that charges and discharges DC power, and DC power that is discharged from the battery module is AC power or DC power that is different from the DC power. A power converter that converts the power input from the power line into direct current power that is charged by the battery module, and is connected to the second connected portion included in the base. A plurality of second connection portions provided in the base, and each of the second connection portions provided in the plurality of microbatteries is provided in the base. By connecting each connection portion, a plurality of the micro battery through the power line to provide a power storage device, characterized in that in a state of being electrically connected to each other.

  Further, in this power storage device, the base is a box-shaped housing that houses the plurality of battery modules therein, and the micro battery is disposed at a predetermined housing position inside the housing. It is preferable that the second connecting portion is connected to the second connected portion.

  In this power storage device, it is possible to prevent the microbattery from being unintentionally dropped from the power storage device by housing the micro battery in the housing. Therefore, it is possible to improve the stability and safety of the operation of the power storage device.

  Further, in this power storage device, the microbattery includes a power acquisition unit for extracting the power of the power line or the power output from the power converter to the outside, and is disposed in the housing position in the housing. It is preferable that an opening for exposing the power acquisition unit included in the microbattery is provided.

  In this power storage device, by diverting the power acquisition unit included in the microbattery to the power storage device, it is possible to eliminate the need to separately form the power acquisition unit in the housing. Therefore, the structure of the housing can be simplified.

  According to the power storage device and the micro battery having the above characteristics, the number of battery modules included in the power storage device can be easily increased or decreased by increasing or decreasing the number of connected micro batteries. Therefore, the discharge capacity of the power storage device can be easily changed.

The block diagram shown about an example of the structure of the electrical storage apparatus which concerns on 1st Embodiment of this invention. FIG. 2 is a perspective view schematically showing an example of the structure of the microbattery shown in FIG. 1. Sectional drawing which shows the AA cross section of FIG. The block diagram shown about an example of a structure of the electrical storage apparatus which concerns on 2nd Embodiment of this invention. The perspective view which shows typically about an example of the structure of the micro battery shown in FIG. The perspective view which shows typically about an example of the structure of the housing | casing which accommodates the micro battery shown in FIG. The perspective view which shows the state which accommodated the micro battery shown in FIG. 5 in the housing | casing shown in FIG. Sectional drawing which shows the BB cross section of FIG. The perspective view which shows typically the structure of the 1st modification of a micro battery. Sectional drawing which shows CC cross section of FIG. The perspective view which shows typically the structure of the 2nd modification of a micro battery. The perspective view which shows typically the structure of the 3rd modification of a micro battery.

<First Embodiment>
An example of the configuration of the power storage device according to the first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an example of the configuration of the power storage device according to the first embodiment of the present invention.

  As shown in FIG. 1, the power storage device 1 </ b> X according to the first embodiment of the present invention includes a plurality of micro batteries 10 </ b> X and a common power line 30. The microbattery 10X is electrically connected via the power line 30 to constitute one power storage device 1X. In addition to the microbattery 10X, the power line 30 includes a load that consumes AC power and a power generator that supplies AC power (for example, an inverter that converts DC power obtained by power generation into AC power and outputs the AC power) Various devices such as a solar cell equipped with can be connected. Further, the power line 30 can be connected to the commercial power system via a relay, a converter, or the like.

  The micro battery 10 </ b> X includes a battery module 11, a micro inverter 12 (corresponding to a “power converter”), a charge / discharge control unit 13, and a partial power line 31. The partial power line 31 is a part of the power line 30 and is electrically connected to the micro inverter 12 (particularly, an input / output terminal for AC power). The battery module 11 is also electrically connected to the micro inverter 12 (particularly, a DC power input / output terminal).

  The battery module 11 is configured by connecting at least one battery cell (unit cell) that charges and discharges DC power. Although not particularly illustrated in FIG. 1, various states of the battery module 11 (for example, a voltage value, a current value, a temperature, a charge in the entire battery module 11 or individual battery cells are attached to the battery module 11. BMS that monitors the rate (SOC: State of charge, etc.) and performs control for the battery module 11 to operate safely (for example, stop control to prevent overcharge and overdischarge, abnormal temperature rise) (Battery Management System) may be provided.

  The micro inverter 12 is a device that converts DC power discharged from the battery module 11 into AC power and outputs the AC power to the power line 30 and converts AC power input from the power line 30 into DC power charged by the battery module 11. is there. The micro inverter 12 includes a synchronous control device for monitoring the state of the AC power of the power line 30 and operating in synchronization with the AC power. Therefore, as illustrated in FIG. 1, even if a plurality of micro batteries 10 </ b> X are electrically connected via the power line 30, the battery module 11 of any micro battery 10 </ b> X can be installed without causing a phase shift of AC power. It can be charged and discharged.

  The charge / discharge control unit 13 includes, for example, an arithmetic device such as a CPU (Central Processing Unit) and a storage device such as a semiconductor memory. The charge / discharge control unit 13 acquires various types of information regarding the state of the battery module 11 from, for example, a BMS, The operation of the micro inverter 12 is controlled.

  The charge / discharge control unit 13 included in each of the plurality of microbatteries 10X may be configured to operate independently of each other, but are interconnected by communicating with each other (for example, short-range wireless communication). It may be configured to operate.

  When the charge / discharge control unit 13 operates in an interconnected manner, the parent device and the child device may be determined in each of the plurality of micro batteries 10X constituting one power storage device 1X. For example, the user may manually determine the parent device and the child device by operating a switch for switching between the parent device and the child device provided in the micro battery 10X, or automatically based on a predetermined rule. The machine and the slave unit may be determined. For example, as the rule, a rule determined independently of the characteristics of the micro battery 10X such as the smallest serial number of the micro battery 10X or the smallest serial number generated at the start of communication of the charge / discharge control unit 13 The micro battery 10X (in particular, the battery module 11) is determined based on the characteristics of the micro battery 10X such as the longest estimated life, the latest production date of the micro battery 10X, and the discharge capacity of the battery module 11 being the largest. Examples include rules.

  For example, the charge / discharge control unit 13 included in the micro battery 10 </ b> X of the parent device communicates with the charge / discharge control unit 13 included in the micro battery 10 </ b> X of the child device, thereby obtaining information on the battery module 11 included in the micro battery 10 </ b> X of the child device. get. Next, the charging / discharging control unit 13 included in the micro battery 10X of the parent device responds to an instruction given from a device that adjusts the supply and demand of power, such as a power conditioner, the power supply / demand situation of the power line 30 and the load state Thus, the amount of power to be charged or discharged by the entire power storage device 1X is calculated, and the amount of power to be charged or discharged by each of the micro battery 10X of the parent device and the child device is calculated. Then, the charging / discharging control unit 13 included in the micro battery 10X of the parent device is configured so that the micro battery 10X of the parent device charges or discharges the amount of power as calculated by each of the micro battery 10X of the parent device and the child device. While controlling operation | movement of the battery module 11 and the micro inverter 12 with which it is equipped, the instruction | indication of charge or discharge is transmitted with respect to the charge / discharge control part 13 with which the micro battery 10X of a subunit | mobile_unit is equipped.

  When the charge / discharge control unit 13 operates in an interconnected manner, the number of battery modules 11 that are charged or discharged simultaneously is reduced (in other words, the number of battery modules 11 that are not charged and discharged simultaneously is increased). In this case, the conversion efficiency of the DC power charged or discharged by the battery module 11 can be increased as compared with the case where the battery modules 11 included in all the micro batteries 10X are charged or discharged little by little, which is preferable.

  Next, an example of the structure of the microbattery 10X shown in FIG. 1 will be described with reference to the drawings. FIG. 2 is a perspective view schematically showing an example of the structure of the microbattery shown in FIG. FIG. 3 is a cross-sectional view showing the AA cross section of FIG. 3A is a cross-sectional view showing a cross section of one micro battery 10X, and FIG. 3B is a cross-sectional view showing a cross section of two micro batteries 10X in a connected state.

  As shown in FIGS. 2 and 3, the micro battery 10 </ b> X includes a battery unit 110 </ b> X that houses the battery module 11, an inverter unit 120 </ b> X that houses the micro inverter 12 and the charge / discharge control unit 13, and the micro battery 10 </ b> X. Gripping unit 14 held by the user, power acquisition unit 15, first connection unit 16 (corresponding to “connection unit”), convex protection unit 161, and first connected unit 17 (corresponding to “connected unit”) ) And a concave protection part 171. In addition, the charging / discharging control part 13 may be accommodated in the battery part 110X instead of the inverter part 120X. Further, the BMS can be accommodated in the battery unit 110X together with the battery module 11.

  2 and 3, each of the battery unit 110X and the inverter unit 120X has a rectangular parallelepiped shape, and the bottom surface of the battery unit 110X and the upper surface of the inverter unit 120X are connected and integrated to form a rectangular parallelepiped as a whole. It has become. The gripping part 14 is provided on the upper surface of the battery part 110X, and the power acquisition part 15 is provided on the side surface of the inverter part 120X. Moreover, the 1st connection part 16 and the convex-shaped protection part 161, and the 1st to-be-connected part 17 and the concave-shaped protection part 171 are each on 1 set of parallel side surfaces in the inverter part 120X in which the electric power acquisition part 15 is not provided. Is provided.

  The power acquisition unit 15 is provided to take out the power of the power line 30 or the power output from the micro inverter 12 to the outside. The power acquisition unit 15 is an outlet (plug receptacle) electrically connected to the partial power line 31 and the micro inverter 12. It is configured. For example, the user can acquire the power consumed by the electric device by inserting the power plug of the power device into the power acquisition unit 15. In addition, as shown in FIG.1 and FIG.3 (b), when the some micro battery 10X connects and comprises the one electrical storage apparatus 1X, the alternating current power of the power line 30 is supplied via the electric power acquisition part 15. FIG. Can be acquired. On the other hand, as shown in FIG. 2 and FIG. 3A, when the micro battery 10X does not constitute the power storage device 1X and exists independently, the battery provided in the micro battery 10X via the power acquisition unit 15 AC power that is converted and output by the micro inverter 12 while the module 11 is discharged can be acquired.

  Each of the first connecting portion 16 and the first connected portion 17 is composed of an electrode, and has a structure in which the first connecting portion 16 can be connected to the first connected portion 17. Specifically, in the example shown in FIGS. 2 and 3, one electrode constituting the first connection portion 16 is brought into contact with the two electrodes constituting the first connected portion 17 and physically contacted. And it will be in the state connected electrically (refer FIG.3 (b)).

  The convex protection part 161 and the concave protection part 171 serve as a guide for protecting the first connection part 16 and the first connected part 17 and assisting the connection of the first connection part 16 and the first connected part 17. Yes. Specifically, in the example shown in FIGS. 2 and 3, the convex protection part 161 is a wall-like shape provided around the first connection part 16, and the concave protection part 171 has the first connected part 17. It is a wall surface that forms a concave space to be accommodated, and has a concave shape that fits with the envelope surface of the convex protection portion 161. Then, when the convex protective part 161 is inserted into the concave protective part 171 and the tip of the convex protective part 161 comes into contact with the bottom surface of the concave protective part 171, the first connecting part 16 and the first connected part 17 are It is designed to be in a connected state (see FIG. 3B).

  Each of the first connecting portion 16 and the first connected portion 17 is electrically connected to the partial power line 31. Further, as described above, the partial power line 31 is electrically connected to the micro inverter 12. Therefore, as shown in FIG. 3B, by connecting the first connection portion 16 included in one microbattery 10X to the first connected portion 17 included in another microbattery 10X, these microbatteries The partial power line 31 included in 10X is electrically connected. Thereby, as shown in FIG. 1, a plurality of micro batteries 10 </ b> X are electrically connected to each other via the power line 30.

  As described above, the power storage device 1X according to the first embodiment of the present invention simply connects the first connection unit 16 included in one microbattery 10X to the first connected unit 17 included in another microbattery 10X. One power storage device 1X in which a plurality of micro batteries 10X are electrically connected through a common power line 30 can be obtained. Therefore, the number of battery modules 11 included in the power storage device 1X can be easily increased or decreased by increasing or decreasing the number of connected micro batteries 10X. Therefore, the discharge capacity of power storage device 1X can be easily changed.

  Furthermore, in the power storage device 1X, by increasing or decreasing the number of micro batteries 10X including both the battery module 11 and the micro inverter 12, both the discharge capacity and the inverter capacity of the power storage device 1X are both increased and decreased to maintain a compatible state. can do.

  In addition, for example, even if one battery module 11 becomes unusable due to deterioration or failure, the power storage device 1X can operate normally only by separating or replacing the micro battery 10X including the battery module 11. It becomes possible. Therefore, power storage device 1X is easy to maintain and can be quickly restored.

  Note that the terms “first connecting portion” (corresponding to “connected portion”) and “first connected portion” (corresponding to “connected portion”) only express that both are connectable. There is no particular suggestion of the shape of both. For example, in the example shown in FIG. 2 and FIG. 3 described above, the first connecting portion 16 is a male type and the first connected portion 17 is a female type, but the first connecting portion is a female type and the first connected portion. May be a male shape or a common shape (for example, a shape in which half is a male type and half is a female type) without distinction between a male type and a female type.

  In the example illustrated in FIG. 2, the surface on which the power acquisition unit 15 is formed is different from the surface on which the first connection unit 16 or the first connected unit 17 is formed, but may be the same surface. . However, in this case, when the power storage device 1X is configured by connecting a plurality of micro batteries 10X, only one power acquisition unit 15 can be used.

  For example, when the power storage device 1X can supply power to a plurality of electric devices at the same time, such as when the discharge capacity of each battery module 11 is sufficiently large, the power acquisition unit 15 is configured as shown in FIG. The surface on which the first connecting portion 16 or the first connected portion 17 is formed may be different from the surface to be formed. In addition, for example, when the power storage device 1X is planning to supply power to only one electric device at a time, such as when the discharge capacity of each battery module 11 is small, the power acquisition unit 15 is configured as described above. The surface to be formed and the surface on which the first connecting portion 16 or the first connected portion 17 is formed may be the same surface.

  Moreover, when one microbattery 10X can supply power to a plurality of electric devices at the same time, such as when the discharge capacity of the battery module 11 is very large, a plurality of power acquisition units 15 may be provided. Further, in addition to (or instead of) the power acquisition unit 15 that extracts the power of the power line 30 or the AC power output from the micro inverter 12 as described above, the power acquisition that extracts the DC power discharged by the battery module 11 to the outside. May be provided in the microbattery 10X.

  Further, as described above, when a device such as a power generation device is connected to the power line 30 included in the power storage device 1X or connected to the commercial power system, the first connection unit 16 or the first target A device such as a power generator or a commercial power system may be connected to the connection unit 17 or the power acquisition unit 15 using a predetermined adapter.

  In addition, from the viewpoint of improving the installation stability (preventing falling or the like) in the power storage device 1X, it is preferable that the position of the center of gravity of the microbattery 10X is low. For example, it is preferable that the position of the center of gravity of the microbattery 10X exists at a position below the center of the microbattery 10X installed to configure the power storage device 1X.

  1 illustrates a configuration in which each of the micro batteries 10X constituting the power storage device 1X includes the charge / discharge control unit 13 individually, the charge / discharge control common to all the micro batteries 10X is included in the power storage device 1X. The structure provided with a part may be sufficient. In this case, for example, the charge / discharge control unit may control the operation of the battery module 11 and the micro inverter 12 in each micro battery 10X via a predetermined control line, and each micro battery 10X is not limited to the partial power line 31. A partial control line may be provided.

Second Embodiment
Next, a power storage device according to a second embodiment of the present invention will be described. The power storage device according to the second embodiment of the present invention is mostly in common with the power storage device 1X (see FIGS. 1 to 3) described in the first embodiment. Therefore, in the following, the description related to the first embodiment described above is omitted as appropriate for the power storage device according to the second embodiment of the present invention as long as there is no contradiction, and details of parts different from the first embodiment described above are omitted. Explained.

  First, an example of the configuration of a power storage device according to the second embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a block diagram showing an example of the configuration of the power storage device according to the second embodiment of the present invention.

  As shown in FIG. 4, the power storage device 1Y according to the second embodiment of the present invention is also common to the plurality of micro batteries 10Y, similarly to the power storage device 1X (see FIG. 1) according to the first embodiment of the present invention. The power line 30 is provided.

  The micro battery 10 </ b> Y includes a battery module 11, a micro inverter 12 (corresponding to a “power converter”), and a charge / discharge control unit 13. However, the microbattery 10Y included in the power storage device 1Y according to the second embodiment of the present invention is different from the microbattery 10X (see FIG. 1) included in the power storage device 1X according to the first embodiment of the present invention. Not equipped.

  The power storage device 1X according to the first embodiment of the present invention configures and changes the power storage device by successively connecting the microbattery 10X together with the partial power line 31, but the power storage device according to the second embodiment of the present invention. The device 1Y configures and changes the power storage device by connecting a plurality of micro batteries 10Y one after another to a base including the power line 30.

  Next, an example of the structure of the microbattery 10Y shown in FIG. 4 and an example of the structure of the base including the power line 30 will be described with reference to the drawings. In the following, a case where the base is a box-shaped housing that houses a plurality of battery modules 10Y will be described as an example. FIG. 5 is a perspective view schematically showing an example of the structure of the microbattery shown in FIG. FIG. 6 is a perspective view schematically showing an example of the structure of a housing that houses the microbattery shown in FIG. 5. 7 is a perspective view showing a state in which the microbattery shown in FIG. 5 is housed in the housing shown in FIG. 8 is a cross-sectional view showing a BB cross section of FIG.

  As shown in FIG. 5, the microbattery 10Y includes a battery unit 110Y, an inverter unit 120Y, a gripping unit 14, a power acquisition unit 15, a guide groove 18, and a second connection unit 19 (corresponding to a “connection unit”). ) And a concave protection part 191.

  In the example shown in FIG. 5, the guide groove 18 is a linear groove extending from the upper surface of the battery unit 110Y to the lower surface of the inverter unit 120Y, and is provided on each of a pair of parallel side surfaces of the battery unit 110Y and the inverter unit 120Y. It has been. In addition, the power acquisition unit 15 is provided at one of the side surfaces of the inverter unit 120 </ b> Y where the guide groove 18 is provided and at a position avoiding the guide groove 18. Moreover, the 2nd connection part 19 and the concave-shaped protection part 191 are provided in the lower surface of the inverter part 120Y.

  As shown in FIG. 6, the housing 50 is fitted in the power line 30, a box-shaped main body 51 that can accommodate a plurality of micro batteries 10 </ b> Y, and a guide groove 18 provided in the micro battery 10 </ b> Y. A guide protrusion 52, a second connected portion 53 (corresponding to a “connecting portion”), a convex protection portion 531, and an opening 54 that is an opening provided in the main body 51.

  In the example shown in FIG. 6, the main body 51 is a rectangular parallelepiped box shape having an open top surface and a hollow interior. The guide protrusions 52 are linear protrusions, and a plurality of guide protrusions 52 are provided so as to be parallel to each of a pair of side surfaces facing the main body 51. The opening 54 is provided at one of the side surfaces of the main body 51 on which the guide protrusion 52 is provided, at a position avoiding the guide protrusion 52. A plurality of second connected parts 53 and convex protection parts 531 are provided on the bottom surface of the main body part 51.

  As shown in FIGS. 7 and 8, when the microbattery 10Y is accommodated inside the housing 50, the guide groove 18 provided in the microbattery 10Y is fitted to the guide protrusion 52 provided in the housing 50, The micro battery 10Y is slid toward the bottom surface of the main body 51. As a result, the microbattery 10 </ b> Y is disposed at a storage position that is a predetermined position inside the housing 50. At this time, the guide groove 18, the guide protrusion 52, and the second connection portion are arranged so that the second connection portion 19 included in the microbattery 10 </ b> Y is connected to the second connected portion 53 included in the housing 50. 19 and the concave protection part 191, the 2nd to-be-connected part 53, and the convex protection part 531 are designed. Further, at this time, the opening 54 and the power acquisition unit 15 are designed so that the power acquisition unit 15 included in the microbattery 10Y is exposed from the opening 54 provided in the housing 50.

  Each of the second connecting portion 19 and the second connected portion 53 is configured by an electrode, and has a structure in which the second connecting portion 19 can be connected to the second connected portion 53. Specifically, in the example shown in FIGS. 5 to 8, one electrode constituting the second connected portion 53 comes into contact with the two electrodes constituting the second connecting portion 19 and is physically And it will be in the state connected electrically (refer FIG. 8).

  The concave protection part 191 and the convex protection part 531 protect the second connection part 19 and the second connected part 53, and serve as a guide for assisting the connection of the second connection part 19 and the second connected part 53. Yes. Specifically, in the example shown in FIGS. 5 to 8, the convex protection portion 531 is a wall-like shape provided around the second connected portion 53, and the concave protection portion 191 has the second connection portion 19. It is a wall surface that forms a concave space to be accommodated, and has a shape that fits with the envelope surface of the convex protection portion 521. Then, when the convex protection part 531 is inserted into the concave protection part 191, and the tip of the convex protection part 531 comes into contact with the bottom surface of the concave protection part 191, the second connection part 19 and the second connected part 53 are It is designed to be connected (see FIG. 8). As described above, in the power storage device 1Y, the microbattery 10Y is guided to the accommodation position inside the housing 50 by the guide groove 18 and the guide protrusion 52, and accordingly, the second connection portion 19 and the second connected portion 53 are connected. It is possible to assist the connection. In this case, the concave protection part 191 and the convex protection part 531 do not have to be a guide for assisting the connection of the second connection part 19 and the second connected part 53.

  The second connection portion 19 is electrically connected to the micro inverter 12. Further, the second connected portion 53 is electrically connected to the power line 30. Therefore, as shown in FIG.7 and FIG.8, by connecting each of the 2nd connection part 19 with which the some microbattery 10Y is provided to each of the some 2nd to-be-connected part 53 with which the housing | casing 50 is provided, several Each of the micro inverters 12 included in the micro battery 10Y and the power line 30 are electrically connected. Thereby, as shown in FIG. 4, a plurality of micro batteries 10 </ b> Y are electrically connected to each other via the power line 30.

  As described above, in the power storage device 1Y according to the second embodiment of the present invention, each of the second connection portions 19 included in the plurality of micro batteries 10Y is replaced with each of the plurality of second connected portions 53 included in the housing 50. It is possible to obtain one power storage device 1Y in which a plurality of micro batteries 10Y are electrically connected via a common power line 30 only by connection. Therefore, similarly to the power storage device 1X according to the first embodiment of the present invention described above, the number of battery modules 11 included in the power storage device 1Y can be easily increased or decreased by increasing or decreasing the number of connected micro batteries 10Y. Can do. Therefore, the discharge capacity of power storage device 1Y can be easily changed.

  In addition, by housing micro battery 10Y in housing 50, it is possible to prevent unintentional drop of micro battery 10Y from power storage device 1Y. Therefore, it becomes possible to improve the stability and safety of the operation of the power storage device 1Y.

  It should be noted that the terms “second connection part” (corresponding to “connection part”) and “second connection part” (corresponding to “connection part”) only express that both are connectable. There is no particular suggestion of the shape of both. For example, in the example shown in FIGS. 5 to 8 described above, the second connecting portion 19 is female and the second connected portion 53 is male, but the second connecting portion is male and the second connected portion. May be a female type, or may have a common shape that does not distinguish between a male type and a female type (for example, a shape in which half is a male type and half is a female type).

  In the example shown in FIGS. 5 to 8, when the microbattery 10 </ b> Y is accommodated in the housing 50, the power acquisition unit 15 included in the microbattery 10 </ b> Y is exposed from the opening 54 provided in the housing 50. However, one or more power acquisition units that are electrically connected to the power line 30 may be provided on the outer peripheral surface of the housing 50. However, as in the example illustrated in FIGS. 5 to 8, if the power acquisition unit 15 included in the microbattery 10 </ b> Y is diverted to the power storage device 1 </ b> Y, it is not necessary to form the power acquisition unit 15 in the case 50. 50 configurations can be simplified.

  In addition, when a device such as a power generator is connected to the power line 30 provided in the power storage device 1Y or connected to the commercial power system, a predetermined adapter is connected to the power line 30 or the power acquisition unit 15. May be used to connect a device such as a power generator or a commercial power system.

  4 illustrates the configuration in which each of the micro batteries 10Y constituting the power storage device 1Y includes the charge / discharge control unit 13 individually, the charge / discharge control common to all the micro batteries 10Y is included in the power storage device 1Y. The structure provided with a part may be sufficient. In this case, for example, the charge / discharge control unit may control the operation of the battery module 11 and the micro inverter 12 in each micro battery 10Y via a predetermined control line, and the housing 50 uses not only the power line 30 but also the control line. You may have.

<Deformation, etc.>
[1] In the micro batteries 10X and 10Y constituting the power storage devices 1X and 1Y according to the first and second embodiments of the present invention described above, the battery module 11 is configured to be detachable from the micro inverter 12. May be. This modification will be described with reference to the drawings. FIG. 9 is a perspective view schematically showing the structure of the first modification of the microbattery. FIG. 10 is a cross-sectional view taken along the line CC of FIG. 9 and 10 (a) show a state in which the battery module 11 and the micro inverter 12 are separated, and FIG. 10 (b) shows a state in which the battery module 11 and the micro inverter 12 are connected. . Moreover, in FIG.9 and FIG.10, the battery part 110a and the inverter part 120a which abbreviate | omitted except the characteristic regarding a modification are illustrated.

  As shown in FIGS. 9 and 10, in the microbattery 10 a of this modification, a battery unit 110 a that houses the battery module 11 is detachable from an inverter unit 120 a that houses the microinverter 12. The battery unit 110 a is provided so as to be integrated with the battery module 11 and shields the third connection unit 111, the concave protection unit 1111, and the third connection unit 111 that are electrically connected to the battery module 11. The shielding part 112 to be provided is provided. Further, the inverter unit 120 a includes a third connected portion 121 provided so as to be integrated with the micro inverter 12 and electrically connected to the micro inverter 12, and a convex protection unit 1211.

  Each of the third connecting part 111 and the third connected part 121 is configured by an electrode, and has a structure in which the third connecting part 111 can be connected to the third connected part 121. Specifically, in the example shown in FIG. 9 and FIG. 10, one electrode constituting the third connected portion 121 comes into contact with the two electrodes constituting the third connecting portion 111 and is physically And it will be in the state connected electrically (refer FIG.10 (b)).

  The concave protection part 1111 and the convex protection part 1211 protect the third connection part 111 and the third connected part 121, and serve as a guide for assisting the connection of the third connection part 111 and the third connected part 121. Yes. Specifically, in the example shown in FIGS. 9 and 10, the convex protection part 1211 is configured by a wall-like part provided around the third connected part 121 and a base on which the part on the wall extends. Has been. The concave protection part 1111 is a wall surface forming a concave space that accommodates the third connection part 121 and has a shape that fits with the envelope surface of the convex protection part 1211. Then, when the convex protection part 1211 is inserted into the concave protection part 1111 and the tip of the convex protection part 1211 contacts the bottom surface of the concave protection part 1111, the third connection part 111 and the third connected part 121 are It is designed to be in a connected state (see FIG. 10B).

  As shown in FIG. 9 and FIG. 10A, the shielding part 112 provided in the battery part 110a is a double door that opens into a concave space formed by the concave protection part 1111. For example, the elastic part such as a spring is used. It is designed to close using the body's restoring force. Therefore, in the state where the convex protection part 1211 is not inserted into the concave protection part 1111 (in a state where the battery module 11 and the micro inverter 12 are separated), the shielding part 112 and the concave space formed by the concave protection part 1111 3 The connection part 111 is shielded. Then, as shown in FIG. 10B, when the convex protection part 1211 is inserted into the concave protection part 1111, the shielding part 112 is pushed open by the convex protection part 1211, and the third connection part 111 and the third covered part are connected. The connection unit 121 is in a connectable state.

  When the battery module 11 is configured to be detachable from the micro inverter 12 as described above, the battery module 11 that is mounted and used in an electric device that consumes DC power such as an electric motorcycle is used for the power storage devices 1X and 1Y. In addition, the battery module 11 included in the power storage devices 1X and 1Y can be used by being mounted on the electric device. Therefore, the utilization factor of the battery module 11 can be improved.

  Further, in this microbattery, the third connection portion 111 that may be discharged from the DC power because it is electrically connected to the battery module 11 is shielded by the shielding portion 112 without being exposed. Can do. Therefore, the safety of the microbattery 10a can be improved.

  Note that the terms “third connecting portion” and “third connected portion” merely express that both correspond to be freely connectable, and do not particularly suggest the shapes of both. For example, in the example shown in FIG. 9 and FIG. 10 described above, the third connecting portion 111 is female and the third connected portion 121 is male, but the third connecting portion is male and the third connected portion. May be a female type, or may have a common shape that does not distinguish between a male type and a female type (for example, a shape in which half is a male type and half is a female type).

[2] The micro batteries 10X and 10Y constituting the power storage devices 1X and 1Y according to the first and second embodiments of the present invention described above may include a photovoltaic power generation unit including a solar cell or the like. This modification will be described with reference to the drawings. FIG. 11 is a perspective view schematically showing the structure of a second modification of the microbattery. In addition, in FIG. 11, the battery part 110b and the inverter part 120b which abbreviate | omitted except the characteristic regarding a modification are shown in figure.

  As shown in FIG. 11, the microbattery 10b includes a photovoltaic unit 20 provided along two parallel side surfaces of the battery unit 110b. The photovoltaic unit 20 has at least one photovoltaic element, and charges the battery module 11 with DC power obtained by the power generation of the photovoltaic element.

  As described above, since the microbattery 10b includes the photovoltaic power generation unit 20, the battery module 11 can be charged even in a place where there is no commercial power system such as outdoors.

  In addition, in FIG. 11, although illustrated about the case where the photovoltaic unit 20 is provided only in two side surfaces of the battery part 110b, the photovoltaic unit 20 can be provided in the arbitrary surfaces in the micro battery 10b. For example, the photovoltaic unit 20 may be provided on all the side surfaces of the battery unit 110b, or the photovoltaic unit 20 may be provided on the inverter unit 120b.

[3] The micro batteries 10X and 10Y constituting the power storage devices 1X and 1Y according to the first and second embodiments of the present invention described above each include a display unit that displays the remaining capacity charged in the battery module. It may be. This modification will be described with reference to the drawings. FIG. 12 is a perspective view schematically showing the structure of the third modification of the microbattery. In addition, in FIG. 12, the battery part 110c and the inverter part 120c which abbreviate | omitted except the characteristic regarding a modification are shown in figure.

  As shown in FIG. 12, the microbattery 10c includes a display unit 21 provided at a position on the upper surface of the battery unit 110c where the grip 14 is not formed.

  As described above, since the microbattery 10c includes the display unit 21, the microbattery 10c having a large remaining capacity is selected and detached from the power storage devices 1X and 1Y to be used for another purpose, or the microbattery having a small remaining capacity. For example, the battery 10c can be charged by being incorporated into the power storage devices 1X and 1Y.

  Note that the microbattery 10c may include a transmission unit that transmits the remaining capacity to an electronic device such as a portable terminal instead of (or in addition to) the display unit 21. Moreover, the housing | casing 50 which comprises the electrical storage apparatus 1Y which concerns on 2nd Embodiment of this invention may be provided with this transmission part.

  12 illustrates the case where the display unit 21 is provided on the upper surface of the battery unit 110c, the display unit 21 can be provided on any surface of the microbattery 10c. However, it is preferable to provide the display unit 21 at a position that is easy to see even when the power storage devices 1X and 1Y are configured, such as the upper surface of the battery unit 110c illustrated in FIG.

[4] In the micro batteries 10X and 10Y constituting the power storage devices 1X and 1Y according to the first and second embodiments of the present invention described above, the battery units 110X and 110Y may be commercially available battery modules. . In this case, if the external shape and terminals of the battery module to be used are determined to some extent (especially if the external shape and terminals are determined as a result of standardization of the battery module), the external shape and terminals of the battery module are concerned. The micro batteries 10X and 10Y can be easily manufactured simply by manufacturing the inverter units 120X and 120Y suitable for the above and combining them with the battery module.

[5] The structures shown in FIGS. 2, 3, and 5 to 12 are only examples, and the present invention is not limited to the structures described in these drawings. In addition, the present invention can be realized by adopting another structure that is partly or entirely different from the structure described in these drawings.

  For example, each of the battery units 110X, 110Y, 110a to 110c and the inverter units 120X, 120Y, 120a to 120c has been described as having a rectangular parallelepiped shape, but may have other shapes. For example, the battery unit may be accommodated inside the box-shaped inverter unit, or one or a plurality of plate-shaped inverter units that are not box-shaped are attached along one or a plurality of surfaces of the battery unit. The structure may also be a

  Further, for example, the first connecting portion 16 and the first connected portion 17 (see FIGS. 2 and 3), the second connecting portion 19 and the second contacted portion 53 (see FIGS. 5 to 8), and the third connecting portion 111. Each of the first connected parts 121 (see FIG. 9 and FIG. 10) has been described as an electrode that is electrically connected with physical contact, but at least one of them is in physical contact. It is good also as what can be electrically connected without accompanying (for example, non-contact electric power feeding using electromagnetic induction).

[6] In each of the above-described embodiments and modifications, the micro batteries 10X, 10Y, 10a to 10c are described as including the micro inverter 12. However, the micro batteries 10X, 10Y, 10a to 10c are included in the micro inverter 12. Instead, a microconverter (corresponding to a “power converter”) may be provided. When the microbatteries 10X, 10Y, 10a to 10c input / output DC power to / from the power line 30, a load that consumes DC power or a power generator that supplies DC power to the power line 30 (for example, a solar cell) ) May be connected. Further, the power line 30 may be connected to the commercial power system via a relay, an inverter, or the like.

[7] In each of the above-described embodiments and modifications, the micro batteries 10X, 10Y, and 10a to 10c have been described as including the micro inverter 12, and the power acquisition unit 15 outputs AC power. In addition to (or instead of) the power acquisition unit 15, a power acquisition unit that outputs DC power may be provided. In this case, the power acquisition unit that outputs DC power may directly output the DC power discharged from the battery module 11 or the DC power output from the micro inverter 12, or the micro batteries 10X, 10Y, and 10a to 10c may be separately provided. You may output DC power which converted DC power which battery module 11 discharges or DC power which microinverter 12 outputs by a converter provided.

  The same applies to [6] above, in which the microbatteries 10X, 10Y, 10a to 10c are in addition to (or instead of) the power acquisition unit 15 that outputs DC power, and the power acquisition unit that outputs AC power. May be provided. In this case, the power acquisition unit that outputs AC power outputs AC power obtained by converting DC power discharged from the battery module 11 or DC power output by the microconverter by an inverter provided separately in the micro batteries 10X, 10Y, 10a to 10c. May be.

[8] The above-described embodiments and modifications can be implemented in combination as long as there is no contradiction.

  INDUSTRIAL APPLICABILITY The present invention can be used for a microbattery having a battery module that charges and discharges DC power and a power storage device including the microbattery.

1X, 1Y: Power storage device 10X, 10Y, 10a to 10c: Micro battery 11: Battery module 12: Micro inverter (power converter)
13: Charging / discharging control unit 110X, 110Y, 110a-110c: Battery unit 120X, 120Y, 120a-120c: Inverter unit 14: Grasping unit 15: Power acquisition unit 16: First connection unit (connection unit)
161: Convex protection part 17: First connected part (connected part)
171: Recessed protective part 18: Guide groove 19: Second connection part (connection part)
191: Recessed protection part 20: Photoelectric power generation part 21: Display part 30: Power line 31: Partial power line 50: Case (base)
51: Main body 52: Guide projection 53: Second connected portion 531: Concave protection portion 54: Opening portion 111: Third connecting portion 1111: Concave protection portion 112: Shielding portion 121: Third connected portion 1211: Convex shape Protection part

Claims (12)

A microbattery that constitutes one power storage device by being electrically connected via a common power line,
A battery module for charging and discharging DC power; and
The DC power discharged from the battery module is converted to AC power or DC power different from the DC power and output to the power line, and the power input from the power line is converted to DC power charged by the battery module. A power converter;
A connection portion that is connectable to the other connected portion of the microbattery or the base, and
The connection part is connected to the connected part included in another microbattery, or each of the connection parts included in the plurality of microbatteries is connected to each of the plurality of connected parts included in the base. Thus, the microbattery is in a state in which the plurality of microbatteries are electrically connected to each other via the power line. A first connecting portion which is the connecting portion;
A first connected portion that is the connected portion; and a partial power line that forms part of the power line and is electrically connected to the power converter;
The micro battery according to claim 1, wherein the partial power line is electrically connected to each of the first connection portion and the first connected portion. A second connecting portion which is the connecting portion;
The second connection part is electrically connected to the power converter and is a connected part of the base that is electrically connected to the power line. The microbattery according to claim 1, wherein the microbattery is freely connectable.   The microbattery according to any one of claims 1 to 3, wherein the battery module is detachable from the power converter. A third connecting portion provided integrally with the battery module and electrically connected to the battery module;
A third connected portion provided so as to be integrated with the power converter, electrically connected to the power converter, and connectable to the third connecting portion;
The microbattery according to claim 4, further comprising a shielding part that shields the third connection part when the battery module and the power converter are separated.   The microbattery according to any one of claims 1 to 5, further comprising a power acquisition unit for taking out the power of the power line or the power output from the power converter to the outside.   The photovoltaic device according to claim 1, further comprising: a photovoltaic power generation unit that includes at least one photovoltaic power generation device and charges the battery module with direct-current power obtained by power generation of the photovoltaic power generation device. The micro battery according to item.   The micro battery according to claim 1, further comprising a display unit that displays a remaining capacity charged in the battery module. A power storage device comprising a plurality of micro batteries that are electrically connected via a common power line,
Each of the microbatteries
A battery module for charging and discharging DC power; and
The DC power discharged from the battery module is converted to AC power or DC power different from the DC power and output to the power line, and the power input from the power line is converted to DC power charged by the battery module. A power converter;
A partial power line that forms part of the power line and to which the power converter is electrically connected;
A first connected portion electrically connected to the partial power line;
A first connection portion that is electrically connected to the partial power line and is connectable to the first connected portion provided in another microbattery;
By connecting the first connection part included in a certain microbattery to the first connected part included in the other microbattery, the microbatteries are electrically connected to each other via the power line. A power storage device which is connected. A power storage device comprising a plurality of micro batteries that are electrically connected via a common power line,
Comprising a base comprising the power line, and a plurality of second connected parts electrically connected to the power line,
Each of the microbatteries
A battery module for charging and discharging DC power; and
The DC power discharged from the battery module is converted to AC power or DC power different from the DC power and output to the power line, and the power input from the power line is converted to DC power charged by the battery module. A power converter;
A second connecting part that is connectable to the second connected part provided in the base, and
By connecting each of the second connection parts included in the plurality of microbatteries to each of the plurality of second connected parts included in the base, the plurality of microbatteries are electrically connected to each other via the power line. A power storage device characterized by being connected to each other. The base is a box-shaped housing that houses a plurality of the battery modules therein,
The said 2nd connection part will be in the state connected with respect to the said 2nd to-be-connected part, if the said micro battery is arrange | positioned in the predetermined accommodation position inside the said housing | casing. Power storage device. The microbattery includes a power acquisition unit for taking out the power of the power line or the power output from the power converter to the outside,
The power storage device according to claim 11, wherein the housing is provided with an opening that exposes the power acquisition unit included in the microbattery disposed at the housing position.