Electric storage apparatus, electronic device, electric vehicle, and electric power system including a magnetic core

Patent metadata

Field	Value
Publication number	US-9705341-B2
Application number	US-201213592950-A
Country	US
Kind code	B2
Filing date	Aug 23, 2012
Priority date	Aug 31, 2011
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A battery system includes a plurality of electronic storage modules serially connected together. Each electronic storage module includes a battery block group including a plurality of battery cells, and a different magnetic core connected to each battery block group. An electronic device, an electric vehicle and electric power system including the battery system are also provided.

First claim

The application is claimed as follows:

1. A battery system comprising:
an energy storage device, and a plurality of electronic storage modules serially connected together, each electronic storage module including
a battery block group including a plurality of battery cells, and
a magnetic core connected to the battery block group,

wherein the magnetic core in each electronic storage module includes a primary side coil connected to a primary switch and the battery block group and a secondary side coil connected to a secondary switch, a common positive power supply line and a common negative power supply line, and the magnetic core in each electronic storage module is separate from each other,
wherein the common positive power supply line is electrically connected with a common power source and the common positive power supply line is not electrically connected with a positive power terminal of the electronic storage modules through a power line,
wherein the common positive power supply line connects to at least two secondary side coils, and
wherein the energy storage device is connected between the common positive power supply line and the common negative power supply line and the energy storage device is configured to supply electric power to the battery cells via the secondary switch, the secondary side coil, the primary side coil and the primary switch.

2. The battery system according to claim 1 , wherein each electronic storage module is provided in a separate housing.

3. The battery system according to claim 1 , wherein each electronic storage module includes a module controller configured to individually control charging and discharging of the respective battery block group.

4. The battery system according to claim 3 , wherein each of the module controllers are connected through a bus to a common control device.

5. The battery system according to claim 3 , wherein the module controllers are configured to initiate a switching operation to control a length of an on-period for charging or discharging of the respective battery block group.

6. The battery system according to claim 1 , wherein each of the electronic storage modules further comprise a flyback transformer configured as a coupling inductor,
wherein the primary switch is serially connected to the primary side coil, and
wherein the secondary switch is serially connected to the secondary side coil.

7. The battery system according to claim 6 , wherein each electronic storage module includes a module controller configured to individually control charging and discharging of the respective battery block group by controlling the primary switch and the secondary switch of the respective flyback transformer through control pulse signals.

8. The battery system according to claim 7 , wherein the energy storage device is a capacitor.

9. The battery system according to claim 1 , wherein the energy storage device is a capacitor.

10. The battery system according to claim 1 , wherein the energy storage device is configured to provide a common power voltage which is less than a voltage withstanding of the secondary switch.

11. A battery device comprising:
an energy storage device, and
a plurality of electronic storage modules each including
a battery block group including a plurality of battery cells, and
a magnetic core connected to the battery block group and configured to operate with the battery block group,

wherein the magnetic core in each electric storage module includes a primary side coil connected to a primary switch and the battery block group and a secondary side coil connected to a secondary switch, a common positive power supply line and a common negative power supply line, and the magnetic core in each electronic storage module is separate from each other,
wherein the common positive power supply line is electrically connected with a common power source and the common positive power supply line is not electrically connected with a positive power terminal of the electronic storage modules through a power line, and
wherein the common positive power supply line connects to at least two secondary side coils, and
wherein the energy storage device is connected between the common positive power supply line and the common negative power supply line and the energy storage device is configured to supply electric power to the battery cells via the secondary switch, the secondary side coil, the primary side coil and the primary switch.

12. The battery device according to claim 11 , wherein each electronic storage module is provided in a housing.

13. The battery device according to claim 11 , wherein the electronic storage module includes a module controller configured to control charging and discharging of the battery block group.

14. The battery device according to claim 13 , wherein the module controller is configured to initiate a switching operation to control a length of an on-period for charging or discharging of the battery block group.

15. The battery device according to claim 11 , wherein each electronic storage module further comprises a flyback transformer configured as a coupling inductor,
wherein the primary switch is serially connected to the primary side coil, and
wherein the secondary switch is serially connected to the secondary side coil.

16. The battery device according to claim 15 , wherein the electronic storage module includes a module controller configured to control charging and discharging of the battery block group by controlling the primary switch and the secondary switch of the flyback transformer through control pulse signals.

17. The battery device according to claim 15 , wherein the energy storage device is a capacitor.

18. The battery device according to claim 11 , wherein the energy storage device is a capacitor.

19. A control device comprising:
an energy storage device, and
a plurality of electronic storage modules each including
a magnetic core,
a battery block group including a plurality of battery cells,
a primary switch electrically connected to the magnetic core via a primary side coil,
a secondary switch electrically connected to the magnetic core via a secondary side coil, and
a module controller,

wherein the primary side coil connected to the battery block group and the secondary side coil connected to a common positive power supply line and a common negative power supply line, and the magnetic core in each electronic storage module is separate from each other,
wherein the common positive power supply line is electrically connected with a common power source and the common positive power supply line is not electrically connected with a positive power terminal of the electronic storage modules through a power line,
wherein the common positive power supply line connects at least two secondary side coils, and
wherein the energy storage device is connected between the common positive power supply line and the common negative power supply line and the energy storage device is configured to supply electric power to the battery cells via the secondary switch, the secondary side coil, the primary side coil and the primary switch.

20. The control device according to claim 19 , wherein each electronic storage module is provided in a housing.

21. The control device according to claim 19 , wherein the module controller is configured to control charging and discharging of a battery block group that is connected to the magnetic core.

22. The control device accord

Assignees

• Komatsu Yoshihiro
• Kikuchi Hidekazu
• Umetsu Koji
• Sony Corp

Inventors

• Komatsu Yoshihiro
• Kikuchi Hidekazu
• Umetsu Koji

Classifications

• H02J7/56

  Active balancing, e.g. using capacitor-based, inductor-based or DC-DC converters · CPC title

• H02J7/52 Primary

  for charge balancing, e.g. equalisation of charge between batteries · CPC title

• H01M50/107

  having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) · CPC title

• Y02T10/7055

  Cross-Sectional Technologies · mapped topic

• H02J7/0014 Primary

  Electricity · mapped topic