Battery system, battery control device, electric vehicle, mobile body, and power source device

• US 9,209,643 B2
• Filed: 07/25/2012
• Issued: 12/08/2015
• Est. Priority Date: 07/28/2011
• Status: Expired due to Fees

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: Nishikawa, Kazufumi
• Primary Examiner(s): Duda, Rina
• Application Number:
  US14/235,682
• Publication Number:
  US 20140167657A1
• Time in Patent Office: 1,231 Days
• Field of Search: 318/139, 324/426
• US Class Current: 1/1
• CPC Class Codes: B60L 15/2009 for braking
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2240/662 Temperature
• CPC Class Codes: B60L 2250/10 by alarm
• CPC Class Codes: B60L 2250/12 by confirmation, e.g. of the input
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 2250/26 by pedal actuation
• CPC Class Codes: B60L 2260/46 by self learning
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60L 50/52 characterised by DC-motors
• CPC Class Codes: B60L 58/14 Preventing excessive discharging
• CPC Class Codes: B60L 58/15 Preventing overcharging
• CPC Class Codes: B60L 58/16 responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
• CPC Class Codes: B60L 58/18 of two or more battery modules
• CPC Class Codes: B60L 58/21 : having the same nominal voltage
• CPC Class Codes: H01M 10/441 : for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/482 : for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 2010/4271 : Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
• CPC Class Codes: H01M 2220/20 : Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H02J 7/00712 : the cycle being controlled or terminated in response to electric parameters
• CPC Class Codes: Y02E 60/10 : Energy storage using batteries
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles

Abstract

A battery module group includes a plurality of battery groups. Each battery group includes a plurality of battery modules. Cell information is supplied from each battery module of the battery module group to a charge/discharge controller. The charge/discharge controller controls the turning on and off of a plurality of switching elements of a connector based on the supplied cell information of each battery module. The plurality of switching elements correspond to the plurality of battery groups, respectively. Thus, the plurality of battery groups are selectively connected to an external object via a DC/AC converter.

Claims

1. A battery system comprising:

a plurality of battery groups that respectively include at least one battery module including at least one battery cell, and have predetermined target using periods;

a connector for selectively connecting the plurality of battery groups to an external object; and

a controller that calculates a margin at the end of the target using period of each battery group based on a deterioration amount of each battery group, and controls the connector based on the calculated margin.

2. The battery system according to claim 1, wherein

the controller controls the connector such that the battery group having the relatively high margin is charged and discharged on a priority basis.

3. The battery system according to claim 2, wherein

the controller estimates a deterioration amount of each battery group at the end of the target using period, and calculates the margin based on the estimated deterioration amount and a predetermined allowable value of the deterioration amount.

4. The battery system according to claim 3, wherein

the controller stores a history of the deterioration amount of each battery group, and estimates the deterioration amount of each battery group at the end of the target using period based on the stored history.

5. The battery system according to claim 4, wherein

the controller learns a tendency of changes in deterioration amount of each battery group, and estimates the deterioration amount of each battery group at the end of the target using period based on the learnt tendency of the changes.

6. The battery system according to claim 1, further comprising:

a presentation unit for presenting information of each battery group.

7. An electric vehicle, comprising:

the battery system according to claim 1;

a motor driven by electric power supplied from the battery system; and

a drive wheel that is rotated by a torque of the motor.

8. A movable object comprising:

the battery system according to claim 1;

a mobile main body;

a power source that converts electric power supplied from the battery system into power; and

a driving unit that moves the mobile main body by the power obtained in conversion by the power source.

9. A power source device that is connectable to an external object, comprising:

the battery system according to claim 1;

a power conversion device that performs power conversion between the battery system and the external object; and

a system controller that performs control regarding discharging and charging of each battery group of the battery system by controlling the power conversion device.

10. The battery system according to claim 2, wherein

the controller stores a history of the deterioration amount of each battery group and estimates the deterioration amount of each battery group at the end of the target using period based on the stored history.

11. The battery system according to claim 10, wherein

the controller learns a tendency of changes in deterioration amount of each battery group, and estimates the deterioration amount of each battery group at the end of the target using period based on the learnt tendency of the changes.

12. The battery system according to claim 1, wherein

the controller estimates the deterioration amount of each battery group at the end of the target using period, and calculates the margin based on an allowable value of the estimated deterioration amount and a predetermined deterioration amount.

13. The battery system according to claim 12, wherein

the controller stores a history of the deterioration amount of each battery group, and estimates the deterioration amount of each battery group at the end of the target using period based on the stored history.

14. The battery system according to claim 13, wherein

the controller learns a tendency of changes in deterioration amount of each battery group, and estimates the deterioration amount of each battery group at the end of the target using period based on the learnt tendency of changes.

15. The battery system according to claim 1, wherein

the controller stores a history of the deterioration amount of each battery group, and estimates the deterioration amount of each battery group at the end of the target using period based on the stored history.

16. The battery system according to claim 15, wherein

the controller learns a tendency of changes in deterioration amount of each battery group and estimates the deterioration amount of each battery group at the end of the target using period based on the learnt tendency of changes.

17. A battery control device that controls charging and discharging of a plurality of battery groups that respectively include at least one battery module including at least one battery cell and have predetermined target using periods, comprising:

a connector for selectively connecting the plurality of battery groups to an external object; and

a controller that calculates a margin at the end of the target using period of each battery group based on a deterioration amount of each battery group, and controls the connector based on the calculated margin.