CN-122008964-A - Control method, device and equipment of battery water pump and readable storage medium

CN122008964ACN 122008964 ACN122008964 ACN 122008964ACN-122008964-A

Abstract

The embodiment of the application provides a control method, a device, equipment and a readable storage medium of a battery water pump, which relate to the field of thermal management control, and the method comprises the steps of determining the working condition of a first vehicle under the condition that the first vehicle is not in an idle working condition based on the running speed of the first vehicle, wherein the working condition comprises at least one of a driving working condition, a load discharging working condition, a charging working condition and a heat preservation working condition; and determining a target rotating speed of the battery water pump and controlling the battery water pump to operate at the target rotating speed based on the thermal management mode according to the temperature of the battery core in the battery water pump and a preset temperature request.

Inventors

CHEN TING
DU LUGUANG
SONG ZHIDONG
LIU QILI
LIU KUN

Assignees

奇瑞新能源汽车股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260106

Claims (10)

1. A method of controlling a battery water pump, the method comprising: Determining working conditions of a first vehicle under the condition that the first vehicle is not in an idle working condition based on the running speed of the first vehicle, wherein the working conditions comprise at least one of a running working condition, a load discharging working condition, a charging working condition and a heat preservation working condition, the idle working condition refers to the working condition that the running speed is smaller than or equal to a first speed and a first duration is maintained, the running working condition refers to the working condition that the running speed is greater than a second speed and a second duration is maintained, the load discharging working condition refers to the working condition that the output power of an engine of the first vehicle is higher than a preset output power value in the running process, the charging working condition refers to the charging state of the first vehicle, and the heat preservation working condition refers to the working condition that the first vehicle supplies heat to a battery through an external power supply after being inserted into a charging gun; Determining a thermal management mode of the first vehicle according to temperature change data of circulating water in the battery water pump within a preset time period, wherein the thermal management mode comprises a heating mode or a cooling mode, the heating mode is used for heating the circulating water of the battery water pump, and the cooling mode is used for cooling the circulating water of the battery water pump; and determining a target rotating speed of the battery water pump according to the temperature of the battery core in the battery water pump and a preset temperature request based on the thermal management mode, and controlling the battery water pump to operate at the target rotating speed.
2. The method of claim 1, wherein the preset temperature request includes a target temperature preset by an in-vehicle user; Based on the thermal management mode, according to the temperature of the battery core in the battery water pump and a preset temperature request, determining a target rotating speed of the battery water pump and controlling the battery water pump to operate according to the target rotating speed, including: Determining a target working condition of the first vehicle at present; acquiring the highest temperature and the lowest temperature of the battery cell in the duration of the first vehicle running the target working condition, and acquiring the lowest temperature difference of the battery cell in the duration of the first vehicle running the target working condition; Determining the target rotational speed as a first rotational speed according to the maximum temperature and the target temperature in response to the thermal management mode being in the cooling mode, and controlling the battery water pump to rotate at the first rotational speed; And in response to the thermal management mode being in the heating mode, determining the target rotation speed as a second rotation speed according to the highest temperature, the lowest temperature and the lowest temperature difference, and controlling the battery water pump to rotate at the second rotation speed.
3. The method of claim 2, wherein the determining the target rotational speed as a second rotational speed from the maximum temperature, the minimum temperature, and the minimum temperature difference in response to the thermal management mode being in the heating mode comprises: Acquiring the start-stop state of an engine in the first vehicle in the time of running the target working condition of the first vehicle, wherein the start-stop state is used for indicating that the engine is in a start state or in a close state; And in response to the thermal management mode being in the heating mode, determining the second rotating speed according to the highest temperature, the lowest temperature, the on-off state and the lowest temperature difference, and controlling the battery water pump to rotate at the second rotating speed.
4. A method according to any one of claims 1 to 3, wherein the operating conditions are implemented as the driving conditions; Based on the thermal management mode, according to the temperature of the battery core in the battery water pump and a preset temperature request, determining a target rotating speed of the battery water pump and controlling the battery water pump to operate at the target rotating speed, including: Acquiring the highest temperature, the lowest temperature and the lowest temperature difference of the battery cell in the second duration of the running working condition of the first vehicle; determining the target rotating speed as a third rotating speed according to the highest temperature of the battery cell and the target temperature in response to the thermal management mode being in the cooling mode, and controlling the battery water pump to rotate at the third rotating speed; In response to the thermal management mode being in the heating mode and the start-stop state of the engine being an on state, determining the target rotation speed as a fourth rotation speed according to the maximum temperature, the minimum temperature and the minimum temperature difference, and controlling the battery water pump to rotate at the fourth rotation speed; and when the thermal management mode is in the heating mode and the on-off state is in the off state, determining that the target rotating speed is a fifth rotating speed according to the highest temperature, the lowest temperature, the charge capacity value of the battery and the lowest temperature difference, and controlling the battery water pump to rotate at the fifth rotating speed.
5. A method according to any one of claims 1 to 3, wherein the operating condition is implemented as the load discharge condition; Based on the thermal management mode, according to the temperature of the battery core in the battery water pump and a preset temperature request, determining a target rotating speed of the battery water pump and controlling the battery water pump to operate at the target rotating speed, including: acquiring the highest temperature, the lowest temperature and the lowest temperature difference of the battery cell of the first vehicle in a third duration of running the load discharge working condition; and based on the thermal management mode, determining the target rotating speed as a sixth rotating speed according to the highest temperature, the lowest temperature difference and the lowest temperature difference, and controlling the battery water pump to rotate at the sixth rotating speed.
6. A method according to any one of claims 1 to 3, wherein the operating condition is implemented as the charging condition; Based on the thermal management mode, according to the temperature of the battery core in the battery water pump and a preset temperature request, determining a target rotating speed of the battery water pump and controlling the battery water pump to operate at the target rotating speed, including: Acquiring the highest temperature and the lowest temperature difference of the battery cell of the first vehicle in a fourth time period for running the charging working condition; determining the target rotating speed as a seventh rotating speed according to the highest temperature and the target temperature in response to the thermal management mode being in the cooling mode, and controlling the battery water pump to rotate at the seventh rotating speed; And in response to the thermal management mode being in the heating mode, determining that the target rotating speed is an eighth rotating speed according to the highest temperature and the lowest temperature difference, and controlling the battery water pump to rotate at the eighth rotating speed.
7. A method according to any one of claims 1 to 3, wherein the operating conditions are implemented as the insulating conditions; Based on the thermal management mode, according to the temperature of the battery core in the battery water pump and a preset temperature request, determining a target rotating speed of the battery water pump and controlling the battery water pump to operate at the target rotating speed, including: Acquiring the lowest temperature and the lowest temperature difference of the battery cell of the first vehicle in a fifth time period of running the heat preservation working condition; And determining the target rotating speed as a ninth rotating speed according to the target water temperature and the lowest temperature difference, and controlling the battery water pump to rotate at the ninth rotating speed.
8. A control device for a battery water pump, the device comprising: The system comprises a determining module, a first vehicle, a second vehicle, a first power supply and a second power supply, wherein the determining module is used for determining the working condition of the first vehicle under the condition that the first vehicle is not in an idle working condition based on the running speed of the first vehicle, the working condition comprises at least one of a running working condition, a load discharging working condition, a charging working condition and a heat preservation working condition, the idle working condition is a working condition that the running speed is smaller than or equal to a first speed and a first duration is maintained, the running working condition is a working condition that the running speed is greater than a second speed and a second duration is maintained, the load discharging working condition is a working condition that the output power of an engine is higher than a preset output power value in the running process of the first vehicle, the charging working condition is a charging state of the first vehicle, and the heat preservation working condition is a working condition that the first vehicle supplies heat to a battery through an external power supply after the first vehicle is inserted into a charging gun; the determining module is further configured to determine a thermal management mode of the first vehicle according to the working condition, where the thermal management mode includes a heating mode or a cooling mode, the heating mode is used for heating circulating water of the battery water pump, and the cooling mode is used for cooling circulating water of the battery water pump; the determining module is further configured to determine a target rotation speed of the battery water pump according to the temperature of the battery core in the battery water pump and a preset temperature request based on the thermal management mode, and control the battery water pump to operate at the target rotation speed.
9. A computer device comprising a processor and a memory, wherein the memory stores at least one program, the at least one program being loaded and executed by the processor to implement the method of controlling a battery water pump according to any one of claims 1 to 7.
10. A computer-readable storage medium, wherein at least one program is stored in the storage medium, the at least one program being loaded and executed by a processor to implement the control method of the battery water pump according to any one of claims 1 to 7.

Description

Control method, device and equipment of battery water pump and readable storage medium Technical Field The present application relates to the field of thermal management control, and in particular, to a method, an apparatus, a device, and a readable storage medium for controlling a battery water pump. Background Due to endurance anxiety of pure electric vehicles, extended range electric vehicles are used as important technical routes of new energy vehicles in recent years. The battery water pump in the range-extending system is used as a core component of the thermal management system, and the control strategy directly influences the stability of battery operation, system energy consumption and overall vehicle performance. When the battery water pump is in an open-loop control state during the control of the battery water pump in the related technology, the battery controller obtains an open-loop expected control value of the battery water pump according to the first expected water flow of the battery water pump. And the battery controller obtains a first control coefficient corresponding to the battery water pump according to the first expected water flow and the mapping relation between the expected water flow and the control coefficient. And the battery controller determines an open-loop actual control value of the battery water pump according to the open-loop expected control value of the battery water pump and the first control coefficient. The battery controller uses the open-loop actual control value to control the water flow of the battery water pump. However, in the above scheme, it is difficult to adapt to the dynamic temperature requirements under different working conditions, resulting in insufficient control accuracy. Disclosure of Invention The embodiment of the application provides a control method, a device and equipment of a battery water pump and a readable storage medium. The technical scheme is as follows: in one aspect, a control method of a battery water pump is provided, the method comprising: Determining working conditions of a first vehicle under the condition that the first vehicle is not in an idle working condition based on the running speed of the first vehicle, wherein the working conditions comprise at least one of a running working condition, a load discharging working condition, a charging working condition and a heat preservation working condition, the idle working condition refers to the working condition that the running speed is smaller than or equal to a first speed and a first duration is maintained, the running working condition refers to the working condition that the running speed is greater than a second speed and a second duration is maintained, the load discharging working condition refers to the working condition that the output power of an engine of the first vehicle is higher than a preset output power value in the running process, the charging working condition refers to the charging state of the first vehicle, and the heat preservation working condition refers to the working condition that the first vehicle supplies heat to a battery through an external power supply after being inserted into a charging gun; Determining a thermal management mode of the first vehicle according to the working condition, wherein the thermal management mode comprises a heating mode or a cooling mode, the heating mode is used for heating circulating water of the battery water pump, and the cooling mode is used for cooling the circulating water of the battery water pump; and determining a target rotating speed of the battery water pump according to the temperature of the battery core in the battery water pump and a preset temperature request based on the thermal management mode, and controlling the battery water pump to operate at the target rotating speed. In another aspect, a control device for a battery water pump, the device comprising: The system comprises a determining module, a first vehicle, a second vehicle, a first power supply and a second power supply, wherein the determining module is used for determining the working condition of the first vehicle under the condition that the first vehicle is not in an idle working condition based on the running speed of the first vehicle, the working condition comprises at least one of a running working condition, a load discharging working condition, a charging working condition and a heat preservation working condition, the idle working condition is a working condition that the running speed is smaller than or equal to a first speed and a first duration is maintained, the running working condition is a working condition that the running speed is greater than a second speed and a second duration is maintained, the load discharging working condition is a working condition that the output power of an engine is higher than a preset output power value in the running process of the first vehicle, the charging working condition is a chargi