Battery control device, control method, control system and electric vehicle

Patent metadata

Field	Value
Publication number	US-10056773-B2
Application number	US-201314646442-A
Country	US
Kind code	B2
Filing date	Oct 7, 2013
Priority date	Nov 30, 2012
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

A battery package including a power storage portion; and a control device, where the control device determines if a first temperature of the power storage portion is higher than a predetermined temperature, and if the first temperature is higher than the predetermined temperature, discharges the power storage portion at a first discharge rate.

First claim

The invention claimed is:

1. A battery package, comprising:
a battery; and
a central processing unit (CPU) configured to:
determine that an integrated recharging time of the battery, at temperatures lower than a threshold temperature, exceeds a threshold;
set a recovery mode based on the determination that the integrated recharging time of the battery exceeds the threshold;
determine a first temperature of the battery in the set recovery mode;
control discharge of the battery at a first discharge rate in the set recovery mode, wherein the discharge is controlled based on the first temperature of the battery that is higher than the threshold temperature;
determine a second temperature of the battery;
control a heating operation to heat the battery for a determined time period, wherein the heating operation is controlled based on the second temperature that is lower than the threshold temperature;
determine a third temperature of the heated battery; and
control the discharge of the battery at a second discharge rate, based on the third temperature of the heated battery that is higher than the threshold temperature.

2. The battery package of claim 1 ,
wherein the CPU is further configured to control deterioration of the battery based on a detection of the deterioration of the battery and the recovery mode.

3. The battery package of claim 2 ,
wherein a first capacity of the battery package is within 500 mAh of a second capacity of the battery package in a sequential set of 250-300 cycles, based on the battery package at the temperatures that is below −10 degrees Celsius for a sequential set of 0-300 cycles,
wherein the first capacity corresponds to a capacity of the battery package after the recovery mode and the second capacity corresponds to the capacity of the battery package before the recovery mode,
wherein the sequential set of 0-300 cycles includes the sequential set of 250-300 cycles, and
wherein each of the sequential set of 0-300 cycles comprises recharge of the battery and the discharge of the battery.

4. The battery package of claim 1 , wherein the first discharge rate is a fixed rate.

5. The battery package of claim 1 , wherein the first discharge rate is lower than 0.2C.

6. The battery package of claim 1 , wherein the first discharge rate is between 0.2C and 0.1C.

7. The battery package of claim 1 , wherein the first discharge rate is 0.1C.

8. The battery package of claim 1 , wherein the CPU is further configured to control the discharge of the battery at a third discharge rate before the battery is heated.

9. The battery package of claim 8 , wherein the third discharge rate is same as the first discharge rate.

10. The battery package of claim 8 , wherein the third discharge rate is different from the first discharge rate.

11. The battery package of claim 8 , wherein the first discharge rate is lower than 0.2C.

12. The battery package of claim 8 , wherein the first discharge rate is 0.1C.

13. The battery package of claim 1 , wherein the battery package further comprises a plurality of batteries, and the plurality of batteries include the battery.

14. The battery package of claim 13 , wherein the CPU is further configured to:
determine an initial temperature of at least one battery of the plurality of batteries, wherein the initial temperature of the at least one battery is higher than the threshold temperature; and
control the discharge of the at least one battery of the plurality of batteries at a third discharge rate.

15. The battery package of claim 14 , wherein the CPU is further configured to control the discharge of the plurality of batteries based on at least two different discharge rates for at least two different batteries of the plurality of batteries.

16. The battery package of claim 1 , wherein the battery is configured to power an electronic device.

17. The battery package of claim 16 , wherein the electronic device is a vehicle.

18. A power storage device, comprising:
battery; and
a central processing unit (CPU) configured to:
determine that an integrated recharging time of the battery, at temperatures lower than a threshold temperature, exceeds a threshold;
set a recovery mode based on the determination that the integrated recharging time of the battery exceeds the threshold;
determine a first temperature of the battery in the set recovery mode;
control discharge of the battery at a first discharge rate in the set recovery mode, wherein the discharge is controlled based on the first temperature of the battery that is higher than the threshold temperature;
determine a second temperature of the battery;
control a heating operation to heat the battery for a time period, wherein the heating operation is controlled based on the second temperature that is lower than the threshold temperature;
determine a third temperature of the heated battery; and
control the discharge of the battery at a second discharge rate, based on the third temperature of the heated battery that is higher than the threshold temperature.

19. A method of controlling power storage in a battery package, the method comprising:
determining that an integrated recharging time of a battery, at temperatures lower than a threshold temperature, exceeds a threshold;
setting a recovery mode based on the determination that the integrated recharging time of the battery exceeds the threshold;
determining a first temperature of the battery in the set recovery mode;
controlling discharge of the battery at a first discharge rate in the set recovery mode, wherein the discharge is controlled based on the first temperature of the battery that is higher than the threshold temperature;
determining a second temperature of the battery;
controlling a heating operation to heat the battery for a time period, wherein the heating operation is controlled based on the second temperature that is lower than the threshold temperature;
determining a third temperature of the heated battery; and
controlling the discharge of the battery at a second discharge rate, based on the third temperature of the heated battery that is higher than the threshold temperature.

20. A vehicle comprising a battery package,
wherein the battery package comprises:
a battery; and
a central processing unit (CPU) configured to:
determine that an integrated recharging time of the battery, at temperatures lower than a threshold temperature, exceeds a threshold;
set a recovery mode based on the determination that the integrated recharging time of the battery exceeds the threshold;
determine a first temperature of the battery;
control discharge of the battery at a first discharge rate, based on the first temperature of the battery that is higher than the threshold temperature;
determine a second temperature of the battery;
control a heating operation to heat the battery for a time period, wherein the heating operation is controlled based on the second temperature that is lower than the threshold temperature;
determine a third temperature of the heated battery; and
control the discharge of the battery at a second discharge rate, based on the third temperature of the heated battery that is higher than the threshold temperature.

21. The battery package of claim 1 , wherein based on one of the first temperature, the second temperature or the third temperature of the battery, the CPU is further configured to one of:
control recharge of the battery at a first recharge rate; or
control the recharge of th

Assignees

• Murata Manufacturing Co

Inventors

• Sugeno Naoyuki
• Watanabe Kohki
• Takizawa Shuichi
• Sato Kenji
• Umetsu Koji

Classifications

• H02J2105/37

  exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] · CPC title

• H02J7/82

  Control of state of charge [SOC] · CPC title

• H02J7/977

  of the battery · CPC title

• H02J7/963

  in response to battery voltage gradient · CPC title

• H02J7/80

  including monitoring or indicating arrangements · CPC title