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CN-121989758-A - Battery cooling system of vehicle and control method thereof

CN121989758ACN 121989758 ACN121989758 ACN 121989758ACN-121989758-A

Abstract

The invention relates to a battery cooling system of a vehicle and a control method thereof. The battery cooling system of the vehicle may include an ambient temperature sensor for sensing an ambient temperature, a controller configured to determine a temperature at which to start battery cooling and a temperature at which to end battery cooling based on the ambient temperature sensed by the ambient temperature sensor, predict a predicted travel time of the vehicle, and adjust the temperature at which to start battery cooling and the temperature at which to end battery cooling based on the predicted travel time of the vehicle to determine a final temperature at which to start battery cooling and a final temperature at which to end battery cooling.

Inventors

  • HOU QINGDONG
  • Zheng taixun
  • ZHAI XIAORUI

Assignees

  • 现代自动车株式会社
  • 起亚株式会社

Dates

Publication Date
20260508
Application Date
20241107

Claims (16)

  1. 1. A battery cooling system of a vehicle, comprising: An ambient temperature sensor for sensing an ambient temperature, and A controller configured to: Determining a temperature at which cooling of the battery is started and a temperature at which cooling of the battery is ended according to an ambient temperature sensed by an ambient temperature sensor; predicting an estimated travel time of the vehicle; The temperature at which the battery cooling is started and the temperature at which the battery cooling is ended are adjusted according to the predicted travel time of the vehicle predicted to determine the final temperature at which the battery cooling is started and the final temperature at which the battery cooling is ended.
  2. 2. The battery cooling system of a vehicle according to claim 1, further comprising: Navigation means for providing navigation information; wherein the controller is configured to: the estimated travel time of the vehicle is predicted based on the navigation information provided from the navigation device.
  3. 3. The battery cooling system of a vehicle according to claim 2, further comprising: a storage device for storing a history of travel time of the vehicle; wherein the controller is configured to: in the absence of the navigation information, the estimated travel time of the vehicle is predicted from the historical travel time of the vehicle stored in the storage device.
  4. 4. The battery cooling system of a vehicle according to claim 1, further comprising: a storage device for storing a history of travel time of the vehicle; wherein the controller is configured to: The estimated travel time of the vehicle is predicted from the historical travel time of the vehicle stored in the storage means.
  5. 5. The battery cooling system of a vehicle of any of claims 2-4, wherein the controller is configured to: Dividing the predicted travel time level of the vehicle according to the predicted travel time of the vehicle; Determining a predicted travel time class of the vehicle as class 1 when the predicted travel time of the vehicle is less than the first predetermined time; Determining a predicted travel time class of the vehicle as class 2 when the predicted travel time of the vehicle is greater than or equal to the first predetermined time and less than the second predetermined time; When the predicted travel time of the vehicle is equal to or longer than the second predetermined time, the predicted travel time class of the vehicle is determined as class 3.
  6. 6. The battery cooling system of the vehicle of claim 5, wherein the controller is configured to: When the determined estimated travel time level of the vehicle is 1 level, adjusting the temperature at which the battery cooling is started to be increased by a first predetermined value as a final temperature at which the battery cooling is started, and adjusting the temperature at which the battery cooling is ended to be increased by a second predetermined value as a final temperature at which the battery cooling is ended; When the determined estimated travel time level of the vehicle is 2, adjusting the temperature at which the battery cooling is started to be increased by a third predetermined value as a final temperature at which the battery cooling is started, and adjusting the temperature at which the battery cooling is ended to be increased by a fourth predetermined value as a final temperature at which the battery cooling is ended; When the determined estimated travel time level of the vehicle is 3 steps, the temperature at which the battery cooling is started is adjusted to be increased by a fifth predetermined value as a final temperature at which the battery cooling is started, and the temperature at which the battery cooling is ended is adjusted to be increased by a sixth predetermined value as a final temperature at which the battery cooling is ended.
  7. 7. The battery cooling system of a vehicle according to claim 6, further comprising: A battery temperature sensor for sensing a battery temperature; wherein the controller is configured to: Comparing the final initial battery cooling temperature with the current battery temperature sensed by the battery temperature sensor, and cooling the battery when the current battery temperature is higher than or equal to the final initial battery cooling temperature; During cooling of the battery, the final end battery cooling temperature is compared with the current battery temperature sensed by the battery temperature sensor, and cooling of the battery is stopped when the current battery temperature is equal to or lower than the final end battery cooling temperature.
  8. 8. The battery cooling system of a vehicle of claim 3 or 4, wherein the controller is configured to: after the vehicle is turned off, the historical travel time of the vehicle stored in the storage device is updated according to the actual travel time of the vehicle.
  9. 9. A control method of a battery cooling system of a vehicle, comprising: Determining, by the controller, a temperature at which cooling of the battery is started and a temperature at which cooling of the battery is ended, based on an ambient temperature sensed by the ambient temperature sensor; predicting, by the controller, an estimated travel time of the vehicle; the temperature at which battery cooling is started and the temperature at which battery cooling is ended are adjusted by a controller according to the predicted travel time of the vehicle predicted to determine the final temperature at which battery cooling is started and the final temperature at which battery cooling is ended.
  10. 10. The control method according to claim 9, wherein, when predicting an estimated travel time of the vehicle: The estimated travel time of the vehicle is predicted by the controller based on the navigation information provided from the navigation device.
  11. 11. The control method according to claim 10, wherein, when predicting an estimated travel time of the vehicle: In the absence of the navigation information, the predicted travel time of the vehicle is predicted by the controller from the historical travel time of the vehicle stored in the storage device.
  12. 12. The control method according to claim 9, wherein, when predicting an estimated travel time of the vehicle: the estimated travel time of the vehicle is predicted by the controller based on the historical travel time of the vehicle stored in the storage device.
  13. 13. The control method according to any one of claims 10 to 12, wherein, when predicting an estimated travel time of the vehicle: dividing, by the controller, a predicted travel time class of the vehicle according to the predicted travel time of the vehicle; determining, by the controller, a predicted travel time class of the vehicle as class 1 when the predicted travel time of the vehicle is less than the first predetermined time; Determining, by the controller, a predicted travel time level of the vehicle as level 2 when the predicted travel time of the vehicle is greater than or equal to the first predetermined time and less than the second predetermined time; When the predicted travel time of the vehicle is equal to or longer than the second predetermined time, the predicted travel time class of the vehicle is determined as class 3 by the controller.
  14. 14. The control method according to claim 13, wherein, when adjusting the temperature at which the battery cooling is started and the temperature at which the battery cooling is ended: When the determined estimated travel time level of the vehicle is 1 level, adjusting, by the controller, the temperature at which the battery cooling is started to be increased by a first predetermined value as a final temperature at which the battery cooling is started, and adjusting the temperature at which the battery cooling is ended to be increased by a second predetermined value as a final temperature at which the battery cooling is ended; When the determined estimated travel time level of the vehicle is 2, adjusting, by the controller, the temperature at which the battery cooling is started to be increased by a third predetermined value as a final temperature at which the battery cooling is started, and adjusting the temperature at which the battery cooling is ended to be increased by a fourth predetermined value as a final temperature at which the battery cooling is ended; When the determined estimated travel time level of the vehicle is 3 steps, the controller adjusts the temperature at which the battery cooling is started to be increased by a fifth predetermined value as a final temperature at which the battery cooling is started, and adjusts the temperature at which the battery cooling is ended to be increased by a sixth predetermined value as a final temperature at which the battery cooling is ended.
  15. 15. The control method according to claim 14, wherein after determining the final start battery cooling temperature and the final end battery cooling temperature: comparing, by the controller, the final starting battery cooling temperature with the current battery temperature sensed by the battery temperature sensor, and cooling the battery when the current battery temperature is equal to or higher than the final starting battery cooling temperature; During cooling of the battery, the controller compares the final end battery cooling temperature with the current battery temperature sensed by the battery temperature sensor, and stops cooling of the battery when the current battery temperature is equal to or lower than the final end battery cooling temperature.
  16. 16. The control method according to claim 11 or 12, wherein, After the vehicle is turned off, the controller updates the historical travel time of the vehicle stored in the storage device according to the actual travel time of the vehicle.

Description

Battery cooling system of vehicle and control method thereof Technical Field The present invention relates to a battery cooling system of a vehicle and a control method thereof, which can adjust a strategy of battery cooling according to an ambient temperature and a vehicle usage pattern. Background An electric vehicle is provided with a high-voltage battery as a power source of the vehicle. To ensure performance of the high voltage battery, the battery cooling system of the vehicle may maintain the high voltage battery temperature at an optimal operating temperature (e.g., 36 ℃). Once the high voltage battery temperature exceeds the optimal operating temperature, the battery cooling system begins to cool the high voltage battery to reduce the high voltage battery temperature. Existing battery cooling strategies do not take into account ambient temperature and vehicle usage patterns, resulting in excessive battery cooling and energy waste. On the one hand, when the vehicle is parked in a high temperature environment (e.g., 40 ℃ or more) for a long period of time, the high-voltage battery temperature is almost the same as the ambient temperature. In this case, even if the running time of the vehicle is short, the existing battery cooling system immediately starts cooling the high-voltage battery at the time of starting the vehicle to lower the high-voltage battery temperature to the optimum operating temperature. However, considering that the ambient temperature is high and the running time of the vehicle is short, it is difficult to maintain the high-voltage battery temperature at the optimal operating temperature, and thus excessive battery cooling and energy waste may be caused if the existing battery cooling strategy is still adopted. On the other hand, when the vehicle is traveling in a low temperature environment (e.g., below 0 ℃), the existing battery cooling system immediately starts cooling the high-voltage battery to reduce the high-voltage battery temperature to the optimal operating temperature once the high-voltage battery temperature exceeds the optimal operating temperature. But it is considered that the high-voltage battery temperature can naturally decrease due to the lower ambient temperature, and thus excessive battery cooling and energy waste may result if the existing battery cooling strategy is still employed. The information contained in the background section of the invention is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art. Disclosure of Invention An object of the present invention is to provide a battery cooling system of a vehicle and a control method thereof, which can solve the above-mentioned problems of the prior art. To achieve the above object, in one aspect, the present invention provides a battery cooling system of a vehicle, which may include an ambient temperature sensor for sensing an ambient temperature, and a controller, which may be configured to determine a temperature at which to start battery cooling and a temperature at which to end battery cooling according to the ambient temperature sensed by the ambient temperature sensor, predict a predicted travel time of the vehicle, and adjust the temperature at which to start battery cooling and the temperature at which to end battery cooling according to the predicted travel time of the vehicle to determine a final temperature at which to start battery cooling and a final temperature at which to end battery cooling. In an exemplary embodiment of the present invention, the battery cooling system may further include a navigation device for providing navigation information, wherein the controller may be configured to predict an estimated travel time of the vehicle according to the navigation information provided from the navigation device. In an exemplary embodiment of the present invention, the battery cooling system may further include a storage device for storing a historical travel time of the vehicle, wherein the controller may be configured to predict the estimated travel time of the vehicle based on the historical travel time of the vehicle stored in the storage device without the navigation information, or predict the estimated travel time of the vehicle based on the historical travel time of the vehicle stored in the storage device even if the navigation information is present. In an exemplary embodiment of the present invention, the controller may be configured to divide the predicted travel time of the vehicle by a predicted travel time of the vehicle, determine the predicted travel time of the vehicle as a 1-level when the predicted travel time of the vehicle is less than a first predetermined time, determine the predicted travel time of the vehicle as a 2-level when the predicted travel time of the vehicle is greater than