CN-121989718-A - Pantograph charging control method, device, equipment and storage medium

CN121989718ACN 121989718 ACN121989718 ACN 121989718ACN-121989718-A

Abstract

The application relates to the technical field of charging of new energy vehicles and discloses a pantograph charging control method, device, equipment and storage medium, wherein the method comprises the steps of establishing wireless communication with a battery management system of a target vehicle through a wireless communication module and acquiring the battery health state of the target vehicle under the condition that a pantograph enters a charging preparation state; determining a charging mode of the target vehicle according to the battery health state and the user demand parameters of the target vehicle; the target vehicle is charged by the pantograph based on the charging mode. By taking the battery health state as a key decision parameter for charging control of the pantograph, the charging voltage and/or the charging current are dynamically adjusted according to different battery health state levels and user demand parameters, so that the charging strategy can be changed along with the battery health degree, the extra damage to the battery caused by adopting high-power charging in a battery health descending stage is reduced, and the service life of the battery is prolonged.

Inventors

ZHOU WEI
WU HUAWEI
MEI XUEQING
LI ZHI
LIU ZHEN
ZHENG JIA
Wan Chengfeng
LI ZHIHAO

Assignees

湖北文理学院

Dates

Publication Date: 20260508
Application Date: 20260330

Claims (10)

1. A pantograph charge control method, characterized by being applied to a pantograph control unit, comprising: Under the condition that the pantograph enters a charging preparation state, establishing wireless communication with a battery management system of a target vehicle through a wireless communication module, and acquiring a battery health state of the target vehicle, wherein the battery health state is obtained through calculation of a capacity attenuation rate and an internal resistance increase rate of a battery; determining a charging mode of the target vehicle according to the battery health state and the user demand parameters of the target vehicle; And charging the target vehicle through the pantograph based on the charging mode.
2. The method of claim 1, wherein the determining the charging mode of the target vehicle based on the battery state of health and the user demand parameter of the target vehicle comprises: Determining a battery degradation stage of the target vehicle according to the battery state of health; Acquiring a charging current threshold interval corresponding to the battery degradation stage; determining a target charging current of the pantograph according to the charging current threshold interval, the user demand parameter and the to-be-charged amount of the target vehicle; and determining the charging mode of the target vehicle according to the target charging current.
3. The method of claim 2, wherein the user demand parameters include a desired charge duration and a life protection factor, the determining the target charge current of the pantograph based on the charge current threshold interval, the user demand parameters, and the to-be-charged amount of the target vehicle comprising: Determining a theoretical charging current according to the to-be-charged amount and the expected charging duration of the target vehicle; acquiring a minimum charging current and a maximum charging current corresponding to the charging current threshold interval; Determining a charging weight based on a ratio between the theoretical charging current and the maximum charging current; And weighting the charging weight, the minimum charging current, the maximum charging current and the life protection coefficient to obtain the target charging current of the pantograph.
4. The method of claim 2, wherein the determining a battery degradation phase of the target vehicle based on the battery state of health comprises: determining the capacity change rate and the internal resistance change rate of the battery according to the battery health state and the historical battery health state; determining a battery degradation stage of the target vehicle through the battery state of health when the capacity change rate is less than a first preset threshold and the internal resistance change rate is less than a second preset threshold; And when the capacity change rate is larger than a first preset threshold value or the internal resistance change rate is larger than a second preset threshold value, judging that the battery enters an accelerated degradation stage.
5. The method of claim 1, wherein the pantograph control unit is connected with a cooling system control module, the charging the target vehicle through the pantograph based on the charging mode comprising: predicting the heating power of the battery according to the target charging current corresponding to the charging mode and the battery internal resistance of the battery; Determining initial cooling power based on the heating power and a preset battery thermal model; And charging the target vehicle according to the charging mode and the initial cooling power.
6. The method of claim 5, wherein after charging the target vehicle according to the charging mode and the target cooling power, further comprising: acquiring the actual temperature of a battery of the target vehicle; comparing the actual temperature of the battery with a preset temperature threshold value to obtain a temperature deviation; Correcting the initial cooling power through a preset control algorithm according to the temperature deviation to obtain corrected target cooling power; and cooling the battery according to the target cooling power.
7. The method of any one of claims 1 to 6, wherein the establishing wireless communication with the battery management system of the target vehicle through the wireless communication module in the event that the pantograph enters a charge ready state comprises: Transmitting broadcast data through the wireless communication module when the pantograph enters a charging ready state, wherein the wireless signal comprises a station identifier, so that the battery management system generates a dynamic pairing code based on the station identifier and an identification code of a target vehicle; receiving a connection request sent by the battery management system, and verifying a dynamic pairing code in the connection request; After the verification is passed, a wireless communication link is established with the battery management system through the wireless communication module so as to receive the battery health status sent by the battery management system.
8. A pantograph charge control device, characterized by being applied to a pantograph control unit, the device comprising: The communication module is used for establishing wireless communication with a battery management system of a target vehicle through the wireless communication module under the condition that the pantograph enters a charging preparation state, and acquiring the battery health state of the target vehicle, wherein the battery health state is obtained through calculation of the capacity attenuation rate and the internal resistance increase rate of the battery; the determining module is used for determining a charging mode of the target vehicle according to the battery health state and the user demand parameters of the target vehicle; and the charging module is used for charging the target vehicle through the pantograph based on the charging mode.
9. A pantograph charge control apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the pantograph charge control method of any one of claims 1 to 7.
10. A storage medium, characterized in that the storage medium is a computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, realizes the steps of the pantograph charging control method according to any one of claims 1 to 7.

Description

Pantograph charging control method, device, equipment and storage medium Technical Field The application relates to the technical field of charging of new energy vehicles, in particular to a pantograph charging control method, a device, equipment and a storage medium. Background With the popularization of electric heavy vehicles such as electric buses and electric trucks, a pantograph is used as an efficient charging mode and gradually becomes an important energy supplementing mode in urban public transport systems. Compared with the traditional charging pile or wireless charging system, the pantograph has the advantages of high charging power, high charging speed, wide applicability and the like, and is particularly suitable for the requirement of frequent parking in urban public transportation. However, the current pantograph charging system mostly adopts a preset charging current and charging voltage strategy to control the charging process according to a State of Charge (SOC) of the battery, however, the State of Charge (SOH) cannot fully reflect the State of Health of the battery, and a unified charging power strategy is still adopted under the condition of neglecting the State of Health of the battery, so that hyperpolarization, aggravation of temperature rise and further increase of internal resistance are easily caused in a descending stage of Health of the battery, thereby accelerating performance degradation of the power battery and shortening the service life. Disclosure of Invention The application mainly aims to provide a pantograph charging control method, device, equipment and storage medium, and aims to solve the technical problems that a current pantograph charging system controls a charging process according to a battery charge state, so that the performance degradation of a power battery is easy to accelerate and the service life is shortened. In order to achieve the above object, the present application provides a charging control method for a pantograph, which is applied to a pantograph control unit, and the method includes: Under the condition that the pantograph enters a charging preparation state, establishing wireless communication with a battery management system of a target vehicle through a wireless communication module, and acquiring a battery health state of the target vehicle, wherein the battery health state is obtained through calculation of a capacity attenuation rate and an internal resistance increase rate of a battery; determining a charging mode of the target vehicle according to the battery health state and the user demand parameters of the target vehicle; And charging the target vehicle through the pantograph based on the charging mode. Optionally, the determining the charging mode of the target vehicle according to the battery state of health and the user demand parameter of the target vehicle includes: Determining a battery degradation stage of the target vehicle according to the battery state of health; Acquiring a charging current threshold interval corresponding to the battery degradation stage; determining a target charging current of the pantograph according to the charging current threshold interval, the user demand parameter and the to-be-charged amount of the target vehicle; and determining the charging mode of the target vehicle according to the target charging current. Optionally, the user demand parameter includes a desired charging duration and a life protection coefficient, and the determining the target charging current of the pantograph according to the charging current threshold interval, the user demand parameter and the to-be-charged amount of the target vehicle includes: Determining a theoretical charging current according to the to-be-charged amount and the expected charging duration of the target vehicle; acquiring a minimum charging current and a maximum charging current corresponding to the charging current threshold interval; Determining a charging weight based on a ratio between the theoretical charging current and the maximum charging current; And weighting the charging weight, the minimum charging current, the maximum charging current and the life protection coefficient to obtain the target charging current of the pantograph. Optionally, the determining the battery degradation stage of the target vehicle according to the battery state of health includes: determining the capacity change rate and the internal resistance change rate of the battery according to the battery health state and the historical battery health state; determining a battery degradation stage of the target vehicle through the battery state of health when the capacity change rate is less than a first preset threshold and the internal resistance change rate is less than a second preset threshold; And when the capacity change rate is larger than a first preset threshold value or the internal resistance change rate is larger than a second preset threshold value, judging that