Example one.
 The present invention proposes a battery intelligent storage device, including: a housing, including a shelf on which the battery pack is placed; and a connector, which is arranged at the rear of the shelf and has a detachable and electrically connected battery And a power receiver, which is connected to an external power source and receives power from an external power source; and a charger, which uses the power received by the power receiver and charges the battery pack connected to the connector through the connector; characterized in that it also It includes a display arranged on the shelf, and the display is used for displaying information indicating the state of the battery pack, and displaying the information indicating the state of the battery pack on the side of the display. The battery case device of Embodiment 1 will be described. First, the configuration of the battery pack will be described.
 According to the example of this embodiment, the battery pack includes a main body unit, an attachment unit, a holding unit, a first display unit, and a charging amount display button. The battery pack is detachably connected to the electrical equipment and used as a DC power source for the electrical equipment. The electrical equipment connected to the battery pack is, for example, an electric car (an example of an electric car), but there is no particular limitation. In addition, the battery pack may be standardized so that it can be connected to multiple types of devices having different functions (purposes). The main unit is a housing that contains one or more battery packs and a control unit for charging and discharging the one or more battery packs. In addition, the main unit can also accommodate a communication unit for outputting battery pack information through the communication terminal. For example, the information of the battery pack includes information indicating the state of the battery pack. Possible examples of information indicating the state of the battery pack are abnormal history information, such as charge amount, voltage, temperature, number of charge/discharge cycles, temperature abnormality, current abnormality, voltage abnormality, and influence abnormality. In addition, the information of the battery pack may include identification information of the battery pack, and the identification information of the battery pack may be output through the communication terminal. The main body unit has a substantially rectangular cuboid shape in the embodiment; however, it should be noted that the shape of the main body unit is not particularly limited. In addition, the control unit and the communication unit may be realized by a dedicated circuit, and may be realized by a processor, a microcomputer, or the like. The attachment unit is a connection interface provided on the bottom surface of the main unit, and is attached to electrical equipment, and the battery pack will operate as a power source. That is, the attachment unit is a structure (shape and size) that can be attached to an electric device. Specifically, the attachment unit includes a terminal unit a, a wireless communication unit b, and an opening c. The terminal unit a is composed of a plurality of terminals. These multiple terminals are metal terminals for electrically connecting the battery pack and the electrical device that the battery pack will operate as a power source. In the embodiment, the terminal unit a includes a positive terminal and a negative terminal for charging the battery pack, and a positive terminal and a negative terminal for discharging the battery pack. It may also include a communication terminal. The wireless communication unit b is an example of the first wireless communication unit, is a communication unit for short-range wireless communication provided in the attachment unit, and specifically, is a near field communication (NFC) tag; however, the wireless communication unit b There are no special restrictions. In addition, the wireless communication unit b may be provided in the main body unit. In addition, the opening c is an opening through which a lock pin of a battery housing device described later is inserted, and the opening c is provided on the side surface of the attachment unit. The lock pin is inserted through the opening c during charging of the battery pack, and the battery pack cannot be detached from the battery housing device during charging. The holding unit is a handle gripped by the user to carry the battery pack. The holding unit is provided on the top surface of the main body unit.
 In addition, as shown above, it further includes: a discharger, which discharges the battery pack connected to the connector via the connector; and a power source, which provides external electrical equipment with the battery pack discharged by the discharger power supply.
 Further, it further includes: a receiver to obtain information indicating the state of the battery pack from the battery pack; and a control circuit to control the discharge of the battery pack using a discharger based on the information obtained by the receiver.
 Further, it also includes: a receiver that obtains information indicating the state of the battery pack from the battery pack; and a notifier, based on the information obtained by the receiver, notifies the outside of the abnormality of the battery pack, and informs and prompts to stop using the battery Group information, information indicating the life of the battery pack.
 Further, the receiver is a terminal connected to a communication terminal provided in the battery pack.
 Further, the receiver is a second wireless communicator that performs short-range wireless communication with the first wireless communicator provided in the battery pack. .
 Further, wherein the second wireless communicator performs short-range wireless communication with the first wireless communicator in accordance with the Near Field Communication (NFC) standard.
 Further, it includes: a plurality of first connectors, which connect a plurality of battery packs in parallel; a plurality of second connectors, which are arranged in the casing and connect the plurality of battery packs in series; The battery packs of the plurality of second connectors are discharged to supply power to the control circuit corresponding to the external electrical equipment connected to the power source.
 Further, wherein the plurality of second connectors are arranged at positions inside the housing, at the positions, the battery pack is more difficult to attach and detach than the plurality of first connectors.
 Further, it also includes: a switch that switches between supplying power from an external power source to an external electric device connected to the power source, and supplies power to the external electric device connected to the power. The supplier discharges the battery pack connected to the connector through the discharger.