JP-2026074467-A - Energy storage device and control device
Abstract
[Problem] To provide a new approach for diagnosing faults in circuit breakers. [Solution] The energy storage device comprises an energy storage element, a circuit board 6, a circuit breaker provided on the circuit board to interrupt the current path of the energy storage element, and a diagnostic device for diagnosing a fault in the circuit breaker. The circuit breaker has a plurality of switch elements 61A embedded inside the circuit board 6. The diagnostic device has a measuring unit 71A provided on the circuit board to measure the temperature of the switch elements, and a diagnostic unit that diagnoses a fault in the switch elements based on the temperature measured by the measuring unit. [Selection Diagram] Figure 7
Inventors
- 松田 祐樹
- 和田 直也
Assignees
- 株式会社ＧＳユアサ
Dates
- Publication Date
- 20260507
- Application Date
- 20241021
Claims (4)
- Energy storage element, Circuit board and A circuit breaker provided on the circuit board for interrupting the current path of the energy storage element, The system includes a diagnostic device for diagnosing a fault in the circuit breaker, The circuit breaker has a plurality of switch elements embedded inside the circuit board, The diagnostic device includes a measuring unit provided on the circuit board for measuring the temperature of the switch element, and a diagnostic unit for diagnosing a malfunction of the switch element based on the temperature measured by the measuring unit. Energy storage device.
- The energy storage device according to claim 1, wherein the measurement unit has a plurality of temperature sensors provided corresponding to the plurality of switch elements.
- The energy storage device according to claim 1 or 2, wherein the measuring unit is provided on the side of the circuit board opposite to the side facing the energy storage element, or inside the circuit board.
- A device for managing energy storage elements, Circuit board and A circuit breaker provided on the circuit board for interrupting the current path of the energy storage element, The system includes a diagnostic device for diagnosing a fault in the circuit breaker, The circuit breaker has a plurality of switch elements embedded inside the circuit board, The diagnostic device includes a measuring unit provided on the circuit board for measuring the temperature of the switch element, and a diagnostic unit for diagnosing a malfunction of the switch element based on the temperature measured by the measuring unit. Management device.
Description
One aspect of the present invention relates to an energy storage device and a control device. Energy storage devices have been developed that consist of an energy storage element and a circuit breaker that interrupts the current flowing through the energy storage element. Multiple semiconductor switching elements, such as MOSFETs (Metal Oxide Semiconductor Field Effect Transistors), IGBTs (Insulated Gate Bipolar Transistors), and bipolar transistors, are used as circuit breakers. However, if the bonding wires or gate oxide film inside the semiconductor are damaged due to electrical or thermal stress, it may become impossible to control the conduction state (closed state) and the non-conduction state (open state) of the semiconductor switching element. Japanese Patent Publication No. 2016-118571 This is a perspective view showing an example configuration of an energy storage device according to an embodiment.This is a disassembled perspective view of an energy storage device.This diagram illustrates the positions of the circuit breaker and temperature sensor on the circuit board.This is an explanatory diagram illustrating the heat generation situation in the event of an open fault.This is an explanatory diagram illustrating the heat generation situation in the event of a closed-loop failure.This is a cross-sectional view of the circuit board (cross-sectional view along line IV-IV in Figure 3).This is a cross-sectional view of the circuit board in the comparative example.This is a block diagram showing the internal configuration of the control device.This flowchart shows the steps the control unit takes when diagnosing an open fault.This flowchart shows the procedure that the control unit performs when diagnosing a closed fault.This diagram illustrates the positions of the circuit breaker and temperature sensor on the circuit board in a modified example. The following describes an overview of embodiments of the present invention. (1) The energy storage device comprises an energy storage element, a circuit board, a circuit breaker provided on the circuit board for interrupting the current path of the energy storage element, and a diagnostic device for diagnosing a malfunction of the circuit breaker. The circuit breaker has a plurality of switch elements embedded inside the circuit board. The diagnostic device has a measuring unit provided on the circuit board for measuring the temperature of the switch elements, and a diagnostic unit for diagnosing a malfunction of the switch elements based on the temperature measured by the measuring unit. In the above configuration, a switch element with an open fault will not have current flowing through it and will not experience a temperature rise. Other switch elements will have current flowing through them and will experience a temperature rise. Therefore, fault diagnosis can be performed based on the temperature of the switch elements measured by the measurement unit. It is difficult to directly attach the measurement unit to the switch element. With the above configuration, since the switch element is embedded in the circuit board, the measurement unit can be easily attached near the switch element (for example, on the surface of the circuit board). (2) In the energy storage device described in (1) above, the measurement unit may have a plurality of temperature sensors provided corresponding to the plurality of switch elements. The temperature sensor may be a contact-type sensor such as a thermistor, or a non-contact-type sensor. According to the above configuration, fault diagnosis of multiple switch elements embedded in the circuit board can be performed with greater accuracy using multiple corresponding temperature sensors. (3) In the energy storage device described in (1) or (2) above, the measuring unit may be provided on the side of the circuit board opposite to the side facing the energy storage element, or inside the circuit board. According to the above configuration, the influence of heat emitted from the energy storage element on the temperature sensor can be suppressed, while the temperature sensor can be used to detect the temperature of the switch element, enabling more accurate fault diagnosis of multiple switch elements. The technology disclosed herein may be implemented as a management device or management method for energy storage elements. (4) The energy storage element management device comprises a circuit board, a circuit breaker provided on the circuit board for interrupting the current path of the energy storage element, and a diagnostic device for diagnosing a malfunction of the circuit breaker. The circuit breaker has a plurality of switch elements embedded inside the circuit board. The diagnostic device has a measuring unit provided on the circuit board for measuring the temperature of the switch elements, and a diagnostic unit for diagnosing a malfunction of the switch elements based on the temperature measured by the measuring unit. The pre