JP2015156357A5

JP2015156357A5 -

Info

Publication number: JP2015156357A5
Application number: JP2014179246A
Authority: JP
Filing date: 2014-09-03
Publication date: 2015-10-08
Anticipated expiration: 2034-02-19

Description

上記実施形態において、温度センサ６２は「測定部」の一例であり、バッテリ制御部８０は「制御部」の一例であり、エンジンＥＣＵ２０は「制御部とは異なる制御主体」の一例であり、第１スイッチ７１は「第１のスイッチ」の一例である。 In the above embodiment, the temperature sensor 62 is an example of a “measurement unit”, the battery control unit 80 is an example of a “control unit”, the engine ECU 20 is an example of “a control subject different from the control unit”, and 1 switch 71 is an example of the "first switch".

Claims

A lithium-ion battery;
A measurement unit for measuring the temperature of the lithium ion battery;
A first switch connecting the lithium ion battery and a power supply source;
A second switch for connecting the lithium ion battery and a load;
Control for controlling the first switch and the second switch so that the lithium ion battery repeatedly charges and discharges until the temperature of the lithium ion battery measured by the measuring unit reaches a predetermined temperature or higher. Part ,
When discharging the lithium ion battery while repeatedly charging and discharging the lithium ion battery, the total value of the temperature and the set value of the lithium ion battery measured by the measurement unit is compared with an upper limit value. When the total value exceeds the upper limit, a control unit that controls the second switch to limit the discharge of the lithium ion battery;
Power supply system comprising.

The second switch includes a plurality of switches,
When the total value exceeds the upper limit value, the control unit sets a part of the plurality of switches included in the second switch to a conductive state and includes a plurality of switches included in the second switch. Do not turn on some of the other switches
The power supply system according to claim 1.

When the total value does not exceed the upper limit value, the control unit makes all the switches among the plurality of switches included in the second switch conductive.
The power supply system according to claim 2.

The set value is a temperature increase value expected to increase due to the next discharge of the lithium ion battery when the load is driven to the maximum.
The power supply system according to any one of claims 1 to 3.

The control unit determines whether the temperature of the lithium ion battery measured by the measurement unit is equal to or higher than a reference value lower than the upper limit value, and the temperature of the lithium ion battery is equal to or higher than the reference value. In some cases, stopping the lithium ion battery from repeatedly charging and discharging,
The power supply system according to any one of claims 1 to 4.

The controller sets the first switch to a conductive state and turns off the second switch to charge the lithium ion battery, and sets the second switch to a conductive state and the first switch. The lithium ion battery is controlled to be repeatedly charged and discharged by alternately performing the discharging of the lithium ion battery with the switch in the shut-off state .
The power supply system according to any one of claims 1 to 5 .

When the control unit controls the lithium ion battery to repeatedly charge and discharge, the lithium ion battery discharges more than the current flowing into the lithium ion battery when the lithium ion battery is charged. Control to increase the current flowing out of the lithium ion battery when
The power supply system according to any one of claims 1 to 6 .

When the control unit controls the lithium ion battery to repeatedly charge and discharge, the lithium ion battery is charged more than the current flowing out of the lithium ion battery when the lithium ion battery is discharged. Control to increase the current flowing into the lithium ion battery when
The power supply system according to any one of claims 1 to 6 .

When the temperature of the lithium ion battery measured by the measuring unit rises and reaches a predetermined temperature, the control unit outputs a signal permitting a predetermined operation, and the temperature of the lithium ion battery increases. Control so that the lithium ion battery repeatedly charges and discharges in a cycle longer than the cycle before reaching the predetermined temperature.
The power supply system according to any one of claims 1 to 8 .

Mounted on vehicles equipped with engines,
The power supply source is a generator that generates power by generating power using power output from the engine or regenerating power when the vehicle is decelerated ,
The predetermined operation is an idling stop operation of the engine.
The power supply system according to claim 9 .

Immediately after the vehicle is ignited, the control unit supplies power to a starting unit that starts the engine from a power source other than the lithium ion battery. Controlling power supply to the starter so that power is supplied from the lithium ion battery to the starter for starting the engine;
The power supply system according to claim 9 or 10.

A vehicle on which the power supply system according to claim 10 or 11 is mounted.