Vehicle

Patent metadata

Field	Value
Publication number	US-11247577-B2
Application number	US-202017012827-A
Country	US
Kind code	B2
Filing date	Sep 4, 2020
Priority date	Sep 4, 2019
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

A vehicle comprising a battery, a power converter, a charger, a first and a second temperature adjustment circuit including a first and a second pumps for supplying a heat medium, a coupling passage which forms a coupling circuit by coupling the first and the second temperature adjustment circuits, a switching unit capable of switching a state between a circulation state and a non-circulation state, and a control device to select one mode from a plurality of modes. The plurality of modes includes a series mode in which the heat medium is circulated in the coupling circuit in the circulation state and a separate mode in which the heat medium is circulated in at least the second temperature adjustment circuit in the non-circulation state. The control device executes the series mode when charging the battery.

First claim

What is claimed is:

1. A vehicle comprising:
a battery,
a power converter,
a charger,
a first temperature adjustment circuit including a first pump for supplying a heat medium to the battery and the charger,
a second temperature adjustment circuit including a second pump for supplying the heat medium to the power converter and a heat exchange unit for exchanging heat between the heat medium and the outside air,
a coupling passage which forms a coupling circuit by coupling the first temperature adjustment circuit and the second temperature adjustment circuit,
a switching unit capable of switching a state between a circulation state in which the heat medium can circulate in the coupling circuit and a non-circulation state in which the heat medium cannot circulate in the coupling circuit, and
a control device to select one mode from a plurality of modes,
wherein the plurality of modes includes:
a series mode in which the heat medium is circulated in the coupling circuit in the circulation state; and
a separate mode in which the heat medium is circulated in at least the second temperature adjustment circuit in the non-circulation state, and
wherein the control device executes the series mode when charging the battery.

2. The vehicle according to claim 1 , wherein the control device starts charging the battery, and after executing the separate mode, executes the series mode.

3. The vehicle according to claim 1 , wherein the control device receives a charge start sign signal before charging the battery, executes the separate mode before starting the charge of the battery, and then executes the series mode.

4. The vehicle according to claim 2 , further comprising:
a first temperature acquisition unit which acquires a first temperature which is a temperature of the battery, and
a second temperature acquisition unit which acquires a second temperature which is a temperature of the power converter,
wherein the control device executes the separate mode, and then controls change from the separate mode to the series mode based on the first temperature and the second temperature.

5. The vehicle according to claim 4 , wherein the control device executes the separate mode, and then continues the separate mode when the second temperature is higher than a first predetermined value.

6. The vehicle according to claim 4 , further comprising:
a heating unit in the first temperature adjustment circuit,
wherein after executing the separate mode, the control device continues the separate mode in a state where the first pump and the heating unit are operated when the first temperature is equal to or lower than a second predetermined value.

7. The vehicle according to claim 4 , wherein after executing the separate mode, the control device changes the mode from the separate mode to the series mode when the second temperature is equal to or lower than the first temperature.

8. The vehicle according to claim 4 , wherein after executing the separate mode, the control device continues the separate mode when the second temperature is higher than the first temperature and a temperature difference between the second temperature and the first temperature is higher than a third predetermined value.

9. The vehicle according to claim 4 , wherein after executing the separate mode, the control device changes the mode from the separate mode to the series mode when the second temperature is higher than the first temperature and the temperature difference between the second temperature and the first temperature is equal to or less than the third predetermined value.

10. The vehicle according to claim 4 , further comprising:
a third temperature acquisition unit which acquires a third temperature which is a temperature of the charger,
wherein the control device controls an output of the charger based on the first temperature and the third temperature in the series mode.

11. The vehicle according to claim 10 , wherein the control device limits the output of the charger when either of the first temperature is higher than a fourth predetermined value and the third temperature is higher than a fifth predetermined value.

12. The vehicle according to claim 4 , further comprising:
a third temperature acquisition unit which acquires a third temperature which is a temperature of the charger,
wherein the control device controls a change from the series mode to the separate mode based on the first temperature and the third temperature in the series mode.

13. The vehicle according to claim 12 , further comprising:
a heating unit in the first temperature adjustment circuit,
wherein the control device changes the mode from the series mode to the separate mode when the first temperature is equal to or less than a sixth predetermined value and when the third temperature is equal to or less than a seventh predetermined value and operates the first pump and the heating unit.

14. The vehicle according to claim 4 ,
wherein the control device changes an output of the heat exchange unit and an output of the second pump according to the first temperature when the first temperature is higher than an eight predetermined value after charging of the battery is completed.

Assignees

• Honda Motor Co Ltd

Inventors

• Honjo Takuya
• Takeuchi Daisuke

Classifications

• H02J7/977

  of the battery · CPC title

• H01M10/486

  for measuring temperature · CPC title

• H02J7/65

  against overtemperature · CPC title

• B60L53/24 Primary

  Using the vehicle's propulsion converter for charging · CPC title

• H01M10/625

  Vehicles · CPC title