JP2019193498A5

JP2019193498A5 -

Info

Publication number: JP2019193498A5
Application number: JP2018086285A
Authority: JP
Filing date: 2018-04-27
Publication date: 2021-04-22
Anticipated expiration: 2038-04-27

Claims

An electric device having a battery pack and an electric device main body attached to the battery pack.
The battery pack is separated from the first and second cell units in which a plurality of battery cells are connected in series, the first negative electrode terminal connected to the negative electrode of the first cell unit, and the first negative electrode terminal. It has a second positive electrode terminal, which is arranged at a position and is connected to the positive electrode of the second cell unit.
The electric device main body is connected to each other by a short-circuit circuit configured so that the first negative electrode terminal of the first cell unit and the second positive electrode terminal of the second cell unit can be connected to each other, and the short-circuit circuit. It has a load device configured to receive and drive power from the first and second cell units, and has.
The short-circuit circuit has a conductive state in which the first negative electrode terminal and the second positive electrode terminal are connected to each other and a cut state in which the first negative electrode terminal and the second positive electrode terminal are disconnected from each other. An electric device characterized in that the short-circuit circuit is configured to be in the disconnected state when an abnormality occurs in the device.

The electric device according to claim 1, wherein when the battery pack is attached to the main body of the electric device, the short-circuit circuit is configured to be in the disconnected state when an abnormality occurs in the electric device. ..

The electric device according to claim 1 or 2, wherein the short-circuit circuit is configured to be in the cut-off state when an abnormality occurs between the first negative electrode terminal and the second positive electrode terminal.

The electric device according to claim 3, wherein the short-circuit circuit is configured to be in the cut-off state when a short circuit occurs between the first negative electrode terminal and the second positive electrode terminal.

The battery pack is arranged at a position away from the first positive electrode terminal connected to the positive electrode of the first cell unit and the first positive electrode terminal, and is connected to the negative electrode of the second cell unit. With a negative electrode terminal,
The electric device main body has a positive electrode input terminal connected to the first positive electrode terminal and a negative electrode input terminal connected to the second negative electrode terminal.
A main switch is interposed in the short circuit, and when the battery pack is mounted on the main body of the electric device, it is between the first positive electrode terminal and the second positive electrode terminal or between the first negative electrode terminal and the second negative electrode terminal. If there is a short circuit between them, the main switch is opened and the first cell unit and the second cell unit are not connected in series. If there is no short circuit, the main switch is closed and the first cell unit and the first cell unit are connected. The electric device according to any one of claims 1 to 4, wherein the second cell unit is configured to be connected in series.

A bypass connection circuit with a resistor that is connected in parallel with the short circuit is provided.
The fifth aspect of claim 5, wherein when the battery pack is attached to the main body of the electric device, the presence or absence of a short circuit between terminals is detected by the bypass connection circuit in a state where the main switch is turned off. Electrical equipment.

It has a microcomputer that detects the terminal voltages of the first positive electrode terminal, the second positive electrode terminal, the first negative electrode terminal, and the second negative electrode terminal.
The electrical device according to claim 6 , wherein the main switch is turned on and off by the microcomputer.

A semiconductor switching element is used as the main switch.
The electric device according to claim 7 , wherein the semiconductor switching element maintains a disconnected state when the microcomputer is stopped.

The bypass connection circuit is provided with a second switch that is connected in series with the resistor.
The second switch can be turned on and off by the microcomputer, and can be turned on and off.
The electric device according to claim 8 , wherein the microcomputer turns off the second switch when the main switch is turned on.

When the microcomputer detects that there is a short circuit between the first positive electrode terminal and the second positive electrode terminal, or between the first negative electrode terminal and the second negative electrode terminal, it issues an alarm and the main switch. The electrical device according to claim 8 or 9 , wherein the electric device is kept in an off state.

A circuit for extracting a voltage dividing voltage between the first positive electrode terminal and the first negative electrode terminal is provided via a third switch that can be turned on and off by the microcomputer, and the extracted voltage dividing voltage is used to obtain the semiconductor switching element. The electric device according to claim 10 , wherein the electric device is turned on and off.

The electric device according to claim 11 , wherein the third switch is a photocoupler, and a voltage dividing voltage of two resistors connected in series with the photocoupler is connected to the semiconductor switching element.

It has a first cell unit and a second cell unit in which a plurality of battery cells are connected in series, and has a first positive electrode terminal and a first negative electrode terminal from the first cell unit, and a second positive electrode from the second cell unit. A battery pack in which the terminal and the second negative electrode terminal are provided independently,
An electric device main body having a positive electrode input terminal connected to the first positive electrode terminal, a negative electrode input terminal connected to the second negative electrode terminal, and a short-circuit circuit for short-circuiting the first negative electrode terminal and the second positive electrode terminal. Have,
In an electric device in which a series connection circuit between the first cell unit and the second cell unit is established when the battery pack is attached to the electric device main body.
A delay connection means is provided in the short circuit.
A microcomputer for monitoring the output from the battery pack is provided in the main body of the electric device.
An electric device characterized in that the short-circuit circuit is connected when no connection abnormality has occurred in the terminal group, and the short-circuit circuit is not connected when a connection abnormality has occurred.

The microcomputer is characterized in that a connection abnormality is detected by measuring a potential difference between the first positive electrode terminal and the second positive electrode terminal, and between the first negative electrode terminal and the second negative electrode terminal. 13. The electrical device according to 13.