US-12626963-B2 - Power storage cell

US12626963B2US 12626963 B2US12626963 B2US 12626963B2US-12626963-B2

Abstract

An exterior package, a main body portion, and a detection unit are provided. The main body portion is disposed inside the exterior package. The detection unit detects a state of a power storage cell and performs wireless communication, at least a portion of the detection unit being disposed inside the exterior package.

Inventors

Naotake YOSHIDA
Yusuke Fujii
Mitsutoshi Tajima
Wataru Okada
Satoru Matsuyama
Kensaku Fukumoto
Junya Yano

Assignees

Prime Planet Energy & Solutions, Inc.

Dates

Publication Date: 20260512
Application Date: 20220225
Priority Date: 20210311

Claims (9)

1 . A power storage module comprising: a plurality of power storage cells; each of the plurality of power storage cells comprising: an exterior package encompassing only an individual power storage cell of the plurality of power storage cells; a main body portion disposed inside the exterior package; and a detection unit that detects a state of the individual power storage cell and that performs wireless communication, at least a portion of the detection unit being disposed inside the exterior package, wherein the detection unit includes a microcomputer and a wireless communication function unit which serves as a cell balancing unit that performs wireless communication to consume power from the power storage cell when the detection unit determines that a voltage value of the power storage cell is higher than a voltage value of other power storage cells of the plurality of power storage cells, thereby equalizing voltages of the plurality of power storage cells in the power storage module, the detection unit includes a substrate having a circuit that detects the state of the power storage cell encompassed within the exterior package, and an antenna portion provided on the substrate, the exterior package includes an exterior container containing only the individual power storage cell of the plurality of power storage cells in the power storage module, the exterior container being provided with an opening, and a sealing plate that seals the opening of the exterior container, the substrate is located on an inner surface side of the sealing plate, and the antenna portion extends to outside of the exterior package through the sealing plate or the exterior package.
2 . The power storage module according to claim 1 , each of the plurality of power storage cells further comprising a current collecting portion connected to the main body portion, the detection unit is electrically connected to the current collecting portion and is fed with power.
3 . The power storage module according to claim 1 , wherein the detection unit detects at least one of states of: a voltage of the power storage cell; an internal temperature of the power storage cell; and an internal pressure of the power storage cell.
4 . The power storage module according to claim 3 , wherein the detection unit includes a storage unit, and the storage unit stores data resulting from detecting the state of the power storage cell.
5 . The power storage module according to claim 3 , wherein the microcomputer includes power supply terminals, an antenna terminal and a sensor terminal.
6 . A power storage module comprising: a plurality of power storage cells; each of the plurality of power storage cells comprising: a main body portion; a current collecting portion connected to the main body portion; and a detection unit that is electrically connected to the current collecting portion and is fed with power, that detects a state of the power storage cell, and that performs wireless communication, wherein the detection unit includes a microcomputer and a wireless communication function unit which serves as a cell balancing unit that performs wireless communication to consume power from the power storage cell when the detection unit determines that a voltage value of the power storage cell is higher than a voltage value of other power storage cells of the plurality of power storage cells, thereby equalizing voltages of the plurality of power storage cells in the power storage module.
7 . The power storage module according to claim 6 , wherein the detection unit detects at least one of states of: a voltage of the power storage cell; an internal temperature of the power storage cell; and an internal pressure of the power storage cell.
8 . The power storage module according to claim 7 , wherein the detection unit includes a storage unit, and the storage unit stores data resulting from detecting the state of the power storage cell.
9 . The power storage module according to claim 7 , wherein the microcomputer includes power supply terminals, an antenna terminal and a sensor terminal.

Description

This nonprovisional application is based on Japanese Patent Application No. 2021-039304 filed on Mar. 11, 2021, with the Japan Patent Office, the entire contents of which are hereby incorporated by reference. BACKGROUND OF THE INVENTION Field of the Invention The present technology relates to a power storage cell. Description of the Background Art Japanese Patent Laying-Open No. 2020-27767 is a prior art document that discloses a configuration of a battery monitoring device. The battery monitoring device described in Japanese Patent Laying-Open No. 2020-27767 includes a detection substrate mounted on a battery module. The detection substrate has: a detection circuit that detects state information of the battery module; a wireless circuit; and an antenna that wirelessly transmits the state information of the battery module. In the battery monitoring device described in Japanese Patent Laying-Open No. 2020-27767, since the detection substrate is mounted on the battery module, an occupied space thereof becomes large. Further, a space for disposing a power supply to feed power to the detection substrate is required, with the result that the occupied space becomes large. SUMMARY OF THE INVENTION An object of the present technology is to provide a power storage cell including a detection unit that performs wireless communication while suppressing an occupied space from being large. A power storage cell according to a first aspect of the present technology includes an exterior package, a main body portion, and a detection unit. The main body portion is disposed inside the exterior package. The detection unit detects a state of the power storage cell and performs wireless communication, at least portion of the detection unit being disposed inside the exterior package. A power storage cell according to a second aspect of the present technology includes a main body portion, a current collecting portion, and a detection unit. The current collecting portion is connected to the main body portion. The detection unit is electrically connected to the current collecting portion and is fed with power, detects a state of the power storage cell, and performs wireless communication. The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a basic configuration of a battery pack. FIG. 2 is a diagram showing battery cells and end plates included in the battery pack. FIG. 3 is a diagram showing a battery cell in the battery pack. FIG. 4 is a cross sectional view when viewed in a direction of arrowed line IV-IV in FIG. 3. FIG. 5 is a schematic diagram showing an exemplary configuration of an electrode assembly in the present embodiment. FIG. 6 is a circuit diagram showing electric connection between the battery cell and the detection unit. FIG. 7 is a functional block diagram showing a specific example of the detection unit. FIG. 8 is a partial cross sectional view showing a periphery of an antenna portion of a battery cell according to a first modification of the first embodiment. FIG. 9 is an exploded perspective view showing configurations of a detection unit and an exterior package of a battery cell according to a second modification of the first embodiment. FIG. 10 is a partial cross sectional view showing the configuration of the detection unit of the battery cell according to the second modification of the first embodiment. FIG. 11 is a plan view showing an external appearance of a battery cell according to a second embodiment. FIG. 12 is an exploded perspective view showing a configuration of the battery cell according to the second embodiment. FIG. 13 is a plan view showing an external appearance of a battery cell according to a modification of the second embodiment. DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present technology will be described. It should be noted that the same or corresponding portions are denoted by the same reference characters, and may not be described repeatedly. It should be noted that in the embodiments described below, when reference is made to number, amount, and the like, the scope of the present technology is not necessarily limited to the number, amount, and the like unless otherwise stated particularly. Further, in the embodiments described below, each component is not necessarily essential to the present technology unless otherwise stated particularly. It should be noted that in the present specification, the terms “comprise”, “include”, and “have” are open-end terms. That is, when a certain configuration is included, a configuration other than the foregoing configuration may or may not be included. Further, the present technology is not limited to one that necessarily exhibits all the functions and effects stated in the