Vehicle-use storage battery system

Patent metadata

Field	Value
Publication number	US-10442374-B2
Application number	US-201415512693-A
Country	US
Kind code	B2
Filing date	Dec 9, 2014
Priority date	Sep 22, 2014
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

According to one embodiment, a vehicle-use storage battery system includes a storage battery, a main circuit, a circuit breaker, a storage battery management unit, a first determiner, and a second determiner. The main circuit is electrically connected to the storage battery. The circuit breaker is disposed between the storage battery and the main circuit to make or break the electrical connection therebetween. The storage battery management unit manages an operating state of the storage battery. The first determiner determines whether to break the electrical connection between the storage battery and the main circuit by means of the circuit breaker. The second determiner determines, on the basis of at least one of operating states of the storage battery management unit, the first determiner, and the circuit breaker, whether to break the electrical connection between the storage battery and the main circuit by means of the circuit breaker.

First claim

The invention claimed is:

1. A vehicle-use storage battery system comprising:
a storage battery;
a main circuit that is electrically connected to the storage battery;
a circuit breaker that is disposed between the storage battery and the main circuit and makes or breaks electrical connection between the storage battery and the main circuit;
a storage battery management unit that manages an operating state of the storage battery;
a first determiner that determines whether to break the electrical connection between the storage battery and the main circuit by the circuit breaker;
a second determiner that determines, based on at least one of operating states of the storage battery management unit, the first determiner, and the circuit breaker, whether to break the electrical connection between the storage battery and the main circuit by the circuit breaker;
a main circuit unit including the main circuit and the second determiner, and
a storage battery unit including the storage battery, the circuit breaker, the storage battery management unit, and the first determiner,
wherein:
the storage battery unit includes storage battery units,
the storage battery units are connected to the main circuit unit, and
at least one of the first determiner and the second determiner can individually disconnect the storage battery units from the main circuit unit.

2. The vehicle-use storage battery system according to claim 1 , further comprising:
a first relay that is closed to control the circuit breaker to open in accordance with a result of the determination of the first determiner; and
a second relay that is closed to control the circuit breaker to open in accordance with a result of the determination of the second determiner.

3. The vehicle-use storage battery system according to claim 1 , wherein:
the main circuit unit includes a main-circuit-side communicator,
the storage battery unit includes a battery-side communicator that communicates with the main-circuit-side communicator, and
when the main-circuit-side communicator and the battery-side communicator have not established communication, at least one of the first determiner and the second determiner controls the circuit breaker of the storage battery unit having not established communication to open.

4. The vehicle-use storage battery system according to claim 3 , wherein, when the second determiner receives, through the communication between the main-circuit-side communicator and the battery-side communicator, a signal indicating that the first determiner has determined to open the circuit breaker, and detects no opening of the circuit breaker, the second determiner controls the circuit breaker of the storage battery unit to open, the circuit breaker determined to be opened by the first determiner.

5. The vehicle-use storage battery system according to claim 3 , wherein:
the circuit breaker includes a detection contact that switches between open and closed states in accordance with switching of the circuit breaker between open and closed states,
the second determiner detects an open or closed state of the circuit breaker based on a non-conducting or conducting state of the detection contact, and
when the detection contact is in the non-conducting state, the second determiner controls the circuit breaker of the storage battery unit to open, the circuit breaker including the non-conducting detection contact.

6. The vehicle-use storage battery system according to claim 1 , further comprising:
an indicator light that is connected in parallel with the storage battery; and
a mechanical switch that is directly connected to the indicator light and electrically connects the storage battery and the indicator light when a door of a storage box accommodating the storage battery is opened.

Assignees

• Toshiba Kk

Inventors

• Kondo Atsumi
• Kuroda Kazuto
• Arai Tatsuya
• Sato Masaki
• Nishikawa Akinobu
• Kosugi Shinichiro
• Sekino Masahiro
• Yasui Hideaki
• Honda Mai
• Kurosu Masahiro
• Ogawa Kotaro
• Takamatsu Tomonao
• Yoshida Mitsunobu
• Nakahama Takafumi
• Ujiie Akihiko

Classifications

• H02J7/00

  Circuit arrangements for charging or discharging batteries or for supplying loads from batteries · CPC title

• B60L58/10

  for monitoring or controlling batteries · CPC title

• H02J7/663 Primary

  using battery or load disconnect circuits (H02J9/002 takes precedence) · CPC title

• H01M10/625

  Vehicles · CPC title

• B60R16/03 Primary

  for supply of electrical power to vehicle subsystems {or for (circuit arrangements for charging batteries H02J7/00)} · CPC title