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CN-121989690-A - Vehicle energy management method and system

CN121989690ACN 121989690 ACN121989690 ACN 121989690ACN-121989690-A

Abstract

The application discloses an energy management method and system of a vehicle, belonging to the technical field of vehicle management, wherein the energy management method of the vehicle comprises the steps of determining a current power supply mode of a load according to a first current state parameter, a second current state parameter and a first preset state parameter condition when the vehicle is electrified; the method comprises the steps of determining a current power supply mode of a load according to the current temperature of the first battery, the first current state parameter, a preset temperature condition and a second preset state parameter condition when a vehicle is in a power-down working condition, wherein the current power supply mode comprises power supply of the load by the first battery or power supply of the load by a converter. The application can realize the power supply strategy of dynamically adjusting the load of the vehicle and improve the reliability of energy management.

Inventors

  • YANG TAO
  • FU DONGBO
  • SUN JINGSHUAI
  • SHI XINLONG
  • WANG HUI
  • FENG ZHENG
  • Jie Junpeng

Assignees

  • 浙江凌骁能源科技有限公司
  • 浙江零跑科技股份有限公司

Dates

Publication Date
20260508
Application Date
20260306

Claims (10)

  1. 1. A method of energy management of a vehicle, the vehicle comprising a first battery, a second battery, an inverter, and a load, the method comprising: Under the condition that the vehicle is in a power-on working condition, determining a current power supply mode of the load according to a first current state parameter, a second current state parameter and a first preset state parameter condition, wherein the first current state parameter is the current state parameter of the first battery, and the second current state parameter is the current state parameter of the second battery; And under the condition that the vehicle is in a power-down working condition, determining a current power supply mode of the load according to the current temperature of the first battery, the first current state parameter, a preset temperature condition and a second preset state parameter condition, wherein the current power supply mode comprises the power supply of the first battery to the load or the power supply of the converter to the load.
  2. 2. The method of claim 1, wherein the current state parameter comprises a remaining power, and wherein determining the current power supply mode of the load based on the first current state parameter, the second current state parameter, and the first preset state parameter condition comprises: determining a difference between the first current state parameter and the second current state parameter under the condition that the first current state parameter meets a first preset state parameter condition; And under the condition that the difference does not meet a preset difference condition, determining the power supply mode to supply power to the load by the first battery.
  3. 3. The method of claim 2, wherein determining the current power supply mode of the load according to the first current state parameter, the second current state parameter, and the first preset state parameter condition further comprises: And determining that the power supply mode is to supply power for the load by the converter under the condition that the difference meets the preset difference condition or the first current state parameter does not meet the first preset state parameter condition.
  4. 4. The method of claim 2, wherein the difference is a first difference between a first current remaining capacity of the first battery and a second current remaining capacity of the second battery when the current state parameter is the remaining capacity, the preset difference condition is that the first difference is greater than or equal to a first preset difference, and the first preset state parameter condition is that the first current remaining capacity is greater than a preset remaining capacity.
  5. 5. The method of claim 3, further comprising powering the first battery by the converter if the difference satisfies the preset difference condition or the first current state parameter does not satisfy the first preset state parameter condition.
  6. 6. The method of claim 2, wherein determining the current power supply mode of the load according to the current temperature of the first battery, the first current state parameter, a preset temperature condition, and a second preset state parameter condition comprises: Determining a cut-off state parameter according to the corresponding relation between the current temperature and the preset temperature and the state parameter under the condition that the current temperature meets the preset temperature condition; Under the condition that the cut-off state parameter and the first current state parameter meet a second preset state parameter condition, determining the power supply mode to supply power to the load by the first battery; And under the condition that the cut-off state parameter and the first current state parameter do not meet the second preset state parameter condition, determining the power supply mode to supply power to the load by the converter.
  7. 7. The method of claim 6, wherein determining the cutoff state parameter according to the correspondence between the current temperature and the preset temperature and state parameter comprises: Under the condition that the current temperature is smaller than a first preset temperature, determining that the cut-off state parameter is a first cut-off state parameter according to the corresponding relation between the current temperature and the state parameter; Under the condition that the current temperature is larger than the first preset temperature and smaller than the second preset temperature, determining that the cut-off state parameter is a second cut-off state parameter according to the corresponding relation between the current temperature and the state parameter and the corresponding relation between the current temperature and the state parameter; And under the condition that the current temperature is larger than the second preset temperature, determining that the cut-off state parameter is a third cut-off state parameter according to the corresponding relation between the current temperature and the state parameter.
  8. 8. The method of claim 6, wherein the cutoff state parameter is a cutoff remaining power in the case where the current state parameter is the remaining power, and the second preset state parameter condition is that a first current remaining power of the first battery is greater than or equal to the cutoff remaining power.
  9. 9. The method of claim 6, further comprising powering the first battery by the converter if the cutoff state parameter and the first current state parameter meet a second preset state parameter condition or the cutoff state parameter and the first current state parameter do not meet the second preset state parameter condition.
  10. 10. An energy management system for a vehicle, the vehicle comprising a first battery, a second battery, an inverter, and a load, the system comprising: The first determining module is used for determining a current power supply mode of the load according to a first current state parameter, a second current state parameter and a first preset state parameter condition when the vehicle is in a power-on working condition, wherein the first current state parameter is a current state parameter of the first battery, and the second current state parameter is a current state parameter of the second battery; The second determining module is used for determining a current power supply mode of the load according to the current temperature of the first battery, the first current state parameter, a preset temperature condition and a second preset state parameter condition under the condition that the vehicle is in a power-down working condition, wherein the current power supply mode comprises power supply of the load by the first battery or power supply of the load by the converter.

Description

Vehicle energy management method and system Technical Field The application relates to the technical field of vehicle management, in particular to an energy management method and system of a vehicle. Background Along with the rapid development of the intellectualization and the electric performance of the automobiles, the on-board functions of the new energy automobiles are increasingly abundant, such as a sentry mode, an on-board refrigerator, a large screen entertainment system and the like, so that the low-voltage electricity consumption requirement of the whole automobile is obviously increased. Most new energy automobiles have energy management strategies that when in power-on, a power battery continuously supplies power to a low-voltage electric appliance through a direct current-direct current Converter (DCDC), a low-voltage storage battery only participates in discharging when being started and stopped, and is in a full-power State at other times, when in power-off, the low-voltage storage battery supplies power to the low-voltage electric appliance, and after the low-voltage electric appliance is discharged to a certain State of Charge (SOC) threshold value, the power battery is high-voltage, and the low-voltage storage battery is supplied with power while supplying power to the low-voltage electric appliance. However, the energy management strategies are simple in charging and discharging to a voltage threshold, DCDC is required to work for a long time, and fine regulation and full utilization of charging and discharging of the low-voltage storage battery are lacking, so that the energy management reliability is poor. Disclosure of Invention The energy management method and system for the vehicle are provided, dynamic adjustment of a vehicle load power supply strategy is achieved, and reliability of energy management is improved. In a first aspect, there is provided a method of energy management for a vehicle, the vehicle including a first battery, a second battery, an inverter, and a load, the method comprising: Under the condition that the vehicle is in an electrified state, determining a current power supply mode of a load according to a first current state parameter, a second current state parameter and a first preset state parameter condition, wherein the first current state parameter is the current state parameter of a first battery, and the second current state parameter is the current state parameter of a second battery; And under the condition that the vehicle is in a power-down working condition, determining a current power supply mode of the load according to the current temperature of the first battery, the first current state parameter, the preset temperature condition and the second preset state parameter condition, wherein the current power supply mode comprises the power supply of the load by the first battery or the power supply of the load by the converter. In some embodiments, the current state parameter includes a remaining power, and determining a current power supply mode of the load according to the first current state parameter, the second current state parameter, and the first preset state parameter condition includes: Determining the difference between the first current state parameter and the second current state parameter under the condition that the first current state parameter meets the first preset state parameter condition; And under the condition that the difference does not meet the preset difference condition, determining the power supply mode to supply power to the load by the first battery. In some embodiments, determining the current power supply mode of the load according to the first current state parameter, the second current state parameter and the first preset state parameter condition further comprises determining that the power supply mode is to supply power to the load by the converter if the difference satisfies the preset difference condition or the first current state parameter does not satisfy the first preset state parameter condition. In some embodiments, when the current state parameter is the remaining power, the difference is a first difference between a first current remaining power of the first battery and a second current remaining power of the second battery, the preset difference condition is that the first difference is greater than or equal to a first preset difference, and the first preset state parameter condition is that the first current remaining power is greater than the preset remaining power. In some embodiments, the method further comprises powering up the first battery by the converter if the difference satisfies a preset difference condition or the first current state parameter does not satisfy a first preset state parameter condition. In some embodiments, determining the current power supply mode of the load according to the current temperature of the first battery, the first current state parameter, the preset temperature