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JP-2026074818-A - Energy storage device

JP2026074818AJP 2026074818 AJP2026074818 AJP 2026074818AJP-2026074818-A

Abstract

[Problem] Reduce the time required to set the controller ID. [Solution] The energy storage device 100 comprises energy storage devices 41 and 42, lower controllers 20 and 30, a higher controller 10, communication lines 51 and 52, and signal lines 61 to 63. The lower controllers 20 and 30 and the higher controller 10 are connected by signal lines 61 to 63 in a predetermined cyclic connection order. The higher controller 10 outputs a pulse signal with a predetermined pulse width via signal line 61 to the lower controller 20, which is set to the smallest connection order in the connection sequence. The lower controllers 20 and 30 output a pulse signal with a predetermined pulse width different from the input pulse signal to the downstream side of the connection sequence via signal lines 62 and 63. [Selection Diagram] Figure 1

Inventors

  • 大塚 真之
  • 有信 勝弘
  • 片岡 全寛

Assignees

  • プライムプラネットエナジー＆ソリューションズ株式会社

Dates

Publication Date
20260507
Application Date
20241021

Claims (4)

  1. N energy storage devices, N lower-level controllers that control each of the N energy storage devices, A higher-level controller connected to the aforementioned N lower-level controllers, N communication lines, It is equipped with N+1 signal lines, Each of the N lower-level controllers is connected to the upper-level controller by the communication line, The N lower-level controllers and the upper-level controller are connected by the signal lines in a predetermined order, circulating between them. The aforementioned higher-level controller The process involves instructing each of the N lower-level controllers to set an ID via the aforementioned communication line, The system is configured such that the lowest-level controller, which is set to the smallest connection order among the aforementioned connection orders, performs the process of outputting a pulse signal of a predetermined pulse width via the signal line. Each of the N lower-level controllers stores information corresponding to a different ID from 1 to N and a pulse signal with a different pulse width corresponding to the ID from 1 to N. Each of the N lower-level controllers is: The process of inputting a pulse signal from the upstream side of the connection sequence via the aforementioned signal line, A process to determine its own ID based on the pulse width of the input pulse signal and the information, The system is configured to perform a process of outputting a pulse signal with a predetermined pulse width, different from the input pulse signal, to the downstream side of the connection sequence via the signal line. Energy storage device.
  2. The energy storage device according to claim 1, wherein each of the N lower-level controllers determines its own ID, then transmits an ID determination signal to the upper-level controller via the communication line, thereby establishing bidirectional communication with the upper-level controller.
  3. The energy storage device according to claim 2, wherein the higher-level controller completes the ID setting when it receives the ID determination signal from all N lower-level controllers.
  4. The energy storage device according to any one of claims 1 to 3, wherein the higher-level controller completes the ID setting based on the pulse signal output from the lower-level controller that is the last in the connection sequence.

Description

This invention relates to an energy storage device. International Publication No. 2012/131797 discloses a communication system comprising a master device with communication capabilities and a plurality of slave devices, numbered 1 through N, also with communication capabilities. The master device and the plurality of slave devices are connected by communication lines. The master device outputs an Nth ID setting signal to the Nth slave device, instructing it to set an identifier. The Nth slave device is then instructed to set its ID. The master device transmits the identifier "N" to the Nth slave device. The Nth slave device is then set to ID "N". The Nth slave device transmits an ID setting completion notification to the master device. When the master device receives an ID setting completion notification from the Nth slave device, it instructs the Nth slave device to output the (N-1)th ID setting signal. The Nth slave device outputs the (N-1)th ID setting signal. The (N-1)th ID setting signal is sent to the (N-1)th slave device. This instructs the (N-1)th slave device to set its ID. The master device transmits the identifier ID "N-1" to the (N-1)th slave device. The ID "N-1" is set to the (N-1)th slave device. The (N-1)th slave device sends an ID setting completion notification to the master device. This process is repeated until the ID "1" is set to the first slave device. Once the ID setting is complete for all slave devices from the first to the Nth, the master device sends an ID setting completion notification to all slave devices from the first to the Nth. As described above, in the communication system disclosed in International Publication No. 2012/131797, IDs are set sequentially from the Nth slave device to the 1st slave device. Here, the master device, after confirming the completion of ID setting for one slave device, instructs that slave device to output an ID setting signal to the next slave device in the sequence. Subsequently, the master device transmits the ID identifier to the next slave device in the sequence. International Publication No. 2012/131797 Figure 1 is a schematic diagram of the energy storage device 100.Figure 2 is a sequence diagram of the ID setting process.Figure 3 is a flowchart of the process executed by the upper-level controller 10 when an ID is set.Figure 4 is a flowchart of the process executed by the lower-level controller 20 when an ID is set.Figure 5 is a flowchart of the process executed by the lower-level controller 30 when an ID is set.Figure 6 is a flowchart of the processes executed by the upper-level controller 10 after the ID setting is complete.Figure 7 is a flowchart of the processes executed by the lower-level controller 20 after the ID setting is complete.Figure 8 is a flowchart of the processes executed by the lower-level controller 30 after the ID setting is complete. The following describes an embodiment of the technology disclosed herein with reference to the drawings. The embodiment described herein is, of course, not intended to limit the invention. Each drawing is schematic and does not necessarily reflect the actual object. Furthermore, components and parts that perform the same function are appropriately denoted by the same reference numerals, and redundant explanations are omitted as appropriate. <Energy storage device 100> Figure 1 is a schematic diagram of the energy storage device 100. As shown in Figure 1, the energy storage device 100 comprises two energy storage devices 41 and 42, two lower controllers 20 and 30, a higher controller 10, two communication lines 51 and 52, and three signal lines 61 to 63. The energy storage device 100 supplies power stored in the energy storage devices 41 and 42 to a load (for example, a vehicle drive system such as an electric motor). The energy storage devices 41 and 42 may be connected to loads (not shown) or external power sources. The lower-level controllers 20 and 30 are controllers that control the energy storage devices 41 and 42. The higher-level controller 10 is a controller that controls the multiple energy storage devices 41 and 42 incorporated in the energy storage device 100 to cooperate. The higher-level controller 10 may be communicated to an external controller (for example, an in-vehicle ECU (Electronic Control Unit)). <Energy storage devices 41, 42> The energy storage devices 41 and 42 are devices that can be repeatedly charged and discharged. The energy storage devices 41 and 42 may be modules in which a predetermined number of cells are connected and arranged by busbars. The energy storage devices 41 and 42 may be configured by connecting multiple cells in series. The cells include secondary batteries such as lithium-ion secondary batteries and nickel-metal hydride batteries. The cells also include capacitors such as lithium-ion capacitors and electric double-layer capacitors. The cells may use either an electrolyte or a solid electrolyte. For example, the cells may be secondary batterie