CN-121989736-A - Vehicle charging time control method, battery management system and vehicle

CN121989736ACN 121989736 ACN121989736 ACN 121989736ACN-121989736-A

Abstract

The application relates to the technical field of new energy automobiles, in particular to a vehicle charging time control method, a battery management system and a vehicle. The method comprises the steps of charging a power battery based on a request charging current, estimating first charging completion time according to current state parameters of the power battery, judging whether the charging time needs to be prolonged or not based on the first charging completion time and an expected charging completion time, adjusting charging parameter values in a standard charging parameter table based on the ratio of the first charging completion time to the expected charging completion time if the charging time needs to be prolonged, generating a temporary charging parameter table, obtaining the request charging current based on the current states of the vehicle and the power battery and the temporary charging parameter table, and charging the vehicle based on the request charging current so as to control the actual charging time to approach the expected charging completion time. Therefore, the user customization in the charging process is realized, the safety of the battery is improved, and the service life of the battery is prolonged.

Inventors

Request for anonymity
LI JINGJING
LIAN LONGFEI

Assignees

晶核能源(嘉兴)有限公司

Dates

Publication Date: 20260508
Application Date: 20251226

Claims (10)

1. A vehicle charge time control method, characterized in that the vehicle includes a power battery, wherein the control method includes: charging the power battery based on a requested charging current; estimating a first charging completion time according to the current state parameter of the power battery; judging whether the charging time needs to be prolonged or not based on the first charging completion time and the expected charging completion time; if the charging time is judged to be required to be prolonged, based on the ratio of the first charging completion time to the expected charging completion time, adjusting the charging parameter value in the standard charging parameter table, and generating a temporary charging parameter table; And obtaining a request charging current based on the current states of the vehicle and the power battery and the temporary charging parameter table, and charging the vehicle based on the request charging current so as to control the actual charging time to approach the expected charging completion time.
2. The vehicle charge time control method according to claim 1, wherein the estimating the first charge completion time based on the current state parameter of the power battery includes: and based on the current state parameters of the power battery based on the battery, and combining a standard charging parameter table, and estimating to obtain the first charging completion time.
3. The vehicle charging time control method according to claim 1, characterized in that the determining whether or not an extension of the charging time is necessary based on the first charging completion time and the desired charging completion time includes: When the first charging completion time is smaller than the expected charging completion time and the ratio of the first charging completion time to the expected charging completion time is smaller than a preset threshold, the charging time needs to be prolonged.
4. The vehicle charge time control method according to claim 3, characterized by further comprising: And generating prompt information when the first charge completion time is greater than or equal to the expected charge completion time or the ratio of the first charge completion time to the expected charge completion time is greater than or equal to the preset threshold.
5. The vehicle charging time control method according to claim 1, characterized in that the adjusting the charging parameter value in the standard charging parameter table based on the ratio of the first charging completion time to the desired charging completion time, generating a temporary charging parameter table, includes: And multiplying the charging current value corresponding to each node in the standard charging parameter table by the ratio of the first charging completion time to the expected charging completion time respectively to obtain an adjusted charging current value corresponding to each node in the temporary charging parameter table.
6. The vehicle charge time control method according to claim 1, characterized in that the control method further comprises: Periodically re-estimating a second charging completion time currently based on the temporary charging parameter table according to a change of a battery state parameter during charging; Updating a charging parameter value in the temporary charging parameter table based on a ratio of the second charging completion time to the desired charging completion time.
7. The vehicle charge time control method according to claim 1, characterized in that before determining whether or not an extension of a charge time is necessary based on the first charge completion time and a desired charge completion time, the vehicle charge time control method further comprises: And receiving the expected charging completion time input by the user through the vehicle-mounted human-computer interaction interface or the mobile terminal application program in communication connection with the vehicle.
8. A battery management system, comprising: the calculation module is used for estimating the first charging completion time according to the current state parameters of the power battery; The judging module is used for judging whether the charging time needs to be prolonged or not based on the first charging completion time and the expected charging completion time; The data processing module is used for adjusting the charging parameter values in the standard charging parameter table based on the ratio of the first charging completion time to the expected charging completion time if the charging time is judged to be required to be prolonged, and generating a temporary charging parameter table; The query module is used for obtaining a request charging current based on the current states of the vehicle and the battery and the temporary charging parameter table; and the charging module is used for charging the vehicle based on the request charging current so as to control the actual charging time to approach the expected charging completion time.
9. A vehicle, characterized by comprising: Power battery, and The battery management system of claim 8.
10. The vehicle of claim 9, further comprising: And an input device through which a user inputs a desired charging completion time.

Description

Vehicle charging time control method, battery management system and vehicle Technical Field The application relates to the technical field of new energy automobiles, in particular to a vehicle charging time control method, a battery management system and a vehicle. Background When the current new energy automobile is charged, a Battery management system (Battery MANAGEMENT SYSTEM, BMS) can collect information such as voltage, temperature and the like of an internal Battery core of the power Battery, and the maximum charging current is determined by combining a preset charging parameter table, then a request is sent to a charging pile, the charging pile gives corresponding charging current according to the request current of the Battery management system, and the Battery management system predicts the time for completing charging by combining the actual charging current and data of the charging parameter table and informs a customer. In the current fast-charging scheme, the customer cannot control the charging time and can only wait passively. In some cases (e.g., where the customer charges in a store underground parking lot while eating and playing for 2-4 hours) the customer does not need to charge as fast. Disclosure of Invention In view of the above, the present application provides a vehicle charging time control method, a battery management system and a vehicle, which solve the problem that a client cannot control the charging time of the vehicle in the prior art. Technical problems of (2). In order to achieve the above object, the present application provides a vehicle charge time control method, the vehicle including a power battery, wherein the control method includes: charging the power battery based on a requested charging current Estimating a first charging completion time according to the current state parameter of the power battery; judging whether the charging time needs to be prolonged or not based on the first charging completion time and the expected charging completion time; if the charging time is judged to be required to be prolonged, based on the ratio of the first charging completion time to the expected charging completion time, adjusting the charging parameter value in the standard charging parameter table, and generating a temporary charging parameter table; And obtaining a request charging current based on the current states of the vehicle and the power battery and the temporary charging parameter table, and charging the vehicle based on the request charging current so as to control the actual charging time to approach the expected charging completion time. In an embodiment of the present application, the estimating the first charging completion time according to the current state parameter of the power battery includes: and based on the current state parameters of the power battery based on the battery, and combining a standard charging parameter table, and estimating to obtain the first charging completion time. In an embodiment of the present application, the determining whether the charging time needs to be prolonged based on the first charging completion time and the desired charging completion time includes: When the first charging completion time is smaller than the expected charging completion time and the ratio of the first charging completion time to the expected charging completion time is smaller than a preset threshold, the charging time needs to be prolonged. In an embodiment of the present application, the vehicle charging time control method further includes: And generating prompt information when the first charge completion time is greater than or equal to the expected charge completion time or the ratio of the first charge completion time to the expected charge completion time is greater than or equal to the preset threshold. In an embodiment of the present application, the adjusting the charging parameter value in the standard charging parameter table based on the ratio of the first charging completion time to the expected charging completion time, to generate a temporary charging parameter table includes: And multiplying the charging current value corresponding to each node in the standard charging parameter table by the ratio of the first charging completion time to the expected charging completion time respectively to obtain an adjusted charging current value corresponding to each node in the temporary charging parameter table. In an embodiment of the present application, the vehicle charging time control method further includes: Periodically re-estimating a second charging completion time currently based on the temporary charging parameter table according to a change of a battery state parameter during charging; Updating a charging parameter value in the temporary charging parameter table based on a ratio of the second charging completion time to the desired charging completion time. In an embodiment of the present application, before determining whether or n