WO2024055545A1

WO2024055545A1 - Automobile power battery management and control method and system

Info

Publication number: WO2024055545A1
Application number: PCT/CN2023/081832
Authority: WO
Inventors: 李爱霞; 余海军; 谢英豪; 张学梅; 李长东
Original assignee: 广东邦普循环科技有限公司; 湖南邦普循环科技有限公司
Priority date: 2022-09-15
Filing date: 2023-03-16
Publication date: 2024-03-21
Also published as: CN116118552A

Abstract

An automobile power battery management and control method and system. The method comprises: obtaining a charging service record and a power battery state of a target vehicle; confirming, according to the charging service record, a charging device, a charging period and a charging amount each time the target vehicle uses the charging service in a preset time period, and obtaining a power distribution network carbon emission reduced amount for all charging devices completing the unit charging amount in different charging periods; screening out the charging time period with minimum power distribution network carbon emission reduced amount as an optimal device charging time period; and in response to the target vehicle passing the charging device in the optimal device charging time period and the remaining state of charge of the power battery being less than a first threshold, sending a charging instruction to the target vehicle.

Description

An automobile power battery management and control method and system

This application claims priority to the Chinese patent application with application number 202211122505.6, which was submitted to the China Patent Office on September 15, 2022. The entire content of this application is incorporated into this application by reference.

Technical field

This application relates to the field of automotive power battery control, for example, to a vehicle power battery management and control method and system.

Background technique

Carbon emissions from China's transportation sector account for about 10% of my country's total carbon emissions, of which automobile carbon emissions are the main body. New energy vehicles are an important starting point to help reduce carbon emissions in the transportation sector, but this does not mean that the new energy vehicle industry does not need to reduce carbon emissions. In fact, the current carbon emissions during the production process of electric vehicles are higher than those of traditional fuel vehicles. The carbon emissions generated by the power battery manufacturing process account for a large proportion, and most of the electricity consumed by electric vehicles during operation is also generated by thermal power. Therefore, the production and use of electric vehicles will also involve carbon emissions.

From the perspective of vehicle power batteries, excessive charging and excessive discharge will affect the life of the battery. If the vehicle battery is at the end of its life, the electricity utilization rate will drop significantly, increasing carbon emissions and causing a waste of power grid energy.

Contents of the invention

Embodiments of the present application provide a vehicle power battery management and control method and system, which reduce the charging time of the power battery when the main power supply mode of the power supply network is thermal power, thereby reducing carbon emissions.

The first aspect of the embodiments of this application provides a vehicle power battery management and control method, including:

Obtain the charging service record and power battery status of the target vehicle;

According to the charging service record, confirm the corresponding charging equipment, charging period and charging amount each time the target vehicle uses the charging service within the preset time period; the charging period refers to the time when the target vehicle uses the charging service. The time period at , each time period is equal in length;

According to the corresponding charging equipment, charging period and charging amount each time the target vehicle uses the charging service, calculate the equivalent amount of carbon emissions per unit of charging completed by the corresponding charging equipment during the charging period, and obtain the carbon emissions equivalent of all charging equipment at different charging times. The equivalent amount of distribution network carbon emissions per unit of charging completed during the period; The carbon emission conversion amount refers to the carbon emissions caused by power generation equipment when the distribution network provides electric energy for charging equipment;

Compare the equivalent amount of distribution network carbon emissions per unit of charging completed by each charging device under different charging periods, and select the charging period corresponding to the smallest equivalent amount of carbon emissions in the distribution network as the optimal charging period for the equipment;

In response to the target vehicle passing by a charging device within the optimal charging period of the device and the power battery status showing that the remaining power is less than the first threshold, a charging instruction is issued to the target vehicle.

The second aspect of the embodiment of the present application provides an automobile power battery management and control system, including a battery management and control system applying the automobile power battery management and control method as described above, multiple charging devices, a security gateway and a router;

Wherein, the battery management and control system is connected to the safety gateway, and the plurality of charging devices are connected to the safety gateway through routing; each charging device receives a charging instruction or a battery replacement instruction from the battery management and control system. Then send corresponding prompt information to the target vehicle.

Description of drawings

Figure 1 is a schematic flow chart of a vehicle power battery management and control method provided by an embodiment of the present application;

Figure 2 is a schematic structural diagram of an automobile power battery management and control system provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

Referring to Figure 1, one embodiment of the present application provides a vehicle power battery management and control method, including:

S10. Obtain the charging service record and power battery status of the target vehicle.

S11. According to the charging service record, confirm the corresponding charging equipment, charging period and charging amount each time the target vehicle uses the charging service within the preset time period; the charging period refers to the charging period when the target vehicle uses the charging service. time period, each time period is of equal length.

S12. According to the corresponding charging equipment, charging period and charging amount each time the target vehicle uses the charging service, calculate the equivalent amount of carbon emissions per unit of charging amount completed by the corresponding charging equipment during the charging period, and obtain the carbon emission equivalent amount of all charging equipment in the charging period. The equivalent carbon emissions of the distribution network per unit of charging completed under different charging periods The amount; the carbon emission equivalent amount refers to the carbon emissions caused by the power generation equipment when the distribution network provides electric energy for charging equipment.

S13. Compare the equivalent carbon emissions of the distribution network per unit of charging completed by each charging device under different charging periods, and select the charging period corresponding to the smallest equivalent amount of carbon emissions in the distribution network as the optimal charging period for the equipment.

S14. In response to the target vehicle passing by a charging device within the optimal charging period of the device and the power battery status showing that the remaining power is less than the first threshold, issue a charging instruction to the target vehicle.

At present, the charging methods of electric vehicles are generally divided into disordered charging and ordered charging. Disordered charging means that electric vehicles are charged according to the user's preference, and the time and method of connecting to the power grid are not managed. Since most electric vehicle users charge at the same time, this charging method is prone to charging peak periods and affects the stability of the power grid. Orderly charging refers to overall planning of the charging behavior of electric vehicles connected in a certain area, and charging scheduling with the optimization goal of reducing the load variance of the power grid. The method provided in this embodiment is essentially a charging scheduling method.

In the embodiment of this application, the battery status and charge and discharge service usage information of electric vehicles that join the distribution network charging and discharging services are analyzed to obtain the corresponding charging equipment, charging period and charging amount each time the target vehicle uses the charging service, and calculate The corresponding charging equipment completes the equivalent amount of carbon emissions per unit of charging amount during the charging period.

In S11, the charging record of each charging device used by the target vehicle is obtained from the charging service record. The purpose of recording the time and charging amount of each charging device is to facilitate the analysis of the charging habits of the target vehicle, because users generally choose their own area. The charging equipment charges the vehicle. The data obtained by S11 can reflect the user's frequency and duration of use of each charging equipment, so that the user's daily charging habits can be used to make plans for the user in S13-S14 based on this data. Take it into consideration to improve user experience.

It should be noted that the first threshold mentioned in S14 is a preset threshold. Generally, the value of the first threshold will be greater than 1/3 of the maximum power storage of the target vehicle. This setting is because the current charging facilities are not perfect enough. Reminding the user to charge when there is still one third of the target vehicle's remaining power can effectively protect the user's long-term driving needs.

Compared with related technologies, embodiments of the present application provide a method for managing and controlling automobile power batteries. Since the equivalent amount of carbon emissions of the distribution network means the amount of carbon emissions caused by the power generation equipment when the distribution network provides electric energy for charging equipment, then through Calculate and compare the equivalent carbon emissions of the distribution network for each unit of charging completed by each charging device under different charging periods, and use this as a basis to formulate vehicle power battery charging plans for users, and try to avoid the main power supply mode of the power supply network being thermal power supply. charging electric vehicles, thereby effectively reducing Less carbon emissions.

In addition, this solution uses the car's power battery loss level to provide timely replacement or early warning prompts for power batteries at the end of their life, ensuring the stability of car driving while reducing carbon emissions.

Exemplarily, the automotive power battery management and control method also includes:

S15. In response to the power battery status showing that the remaining power is less than the second threshold, allocate the nearest charging device to the target vehicle and issue a charging instruction to the target vehicle.

Generally speaking, the value of the second threshold is 1/6 of the maximum power storage capacity of the target vehicle. At this time, if the user uses the target vehicle for long-distance driving, it is very likely that the power will be cut off midway. In order to avoid this kind of thing from happening, when the power battery status shows that the remaining power is less than the second threshold, a more frequent reminder is needed. The user charges.

For example, S12 may include:

Calculate the line transfer rate based on the power supply provided by the distribution network for the corresponding charging equipment and the target vehicle charging amount;

According to the corresponding target vehicle charging amount, the line transfer rate and the carbon emissions of the distribution network during the charging period, the equivalent amount of carbon emissions per unit of charging completed by the corresponding charging equipment during the charging period is calculated.

For example, the calculation of the equivalent amount of carbon emissions per unit of charging completed by the corresponding charging equipment during the charging period may be:

The equivalent amount of carbon emissions per unit of charging amount = (carbon emissions of the distribution network)/(line transfer rate * charging amount).

As renewable energy sources such as wind and solar energy are integrated into the grid, the source of grid energy becomes random and uncontrollable. When electric vehicles are integrated into the grid when "green power" is high, carbon emissions are much lower than when "thermal power" is generated. Based on the carbon emission equivalent amount per unit charging amount, we can clearly see the carbon emission level of the charging equipment when completing the unit charging amount under different charging periods. Later, we can sort and select based on the carbon emission equivalent amount per unit charging amount. The corresponding charging period when the equivalent amount of carbon emissions per unit charge of each charging device takes the minimum value, using this period as a reference to allow the target vehicle to use the corresponding charging equipment for charging during this period as much as possible, thereby reducing the carbon emissions of the distribution network emissions.

It should be noted that the above-mentioned line transfer rate is related to the connection structure between the distribution network distribution node and the corresponding charging equipment. It is necessary to set up electric energy meters to measure the electric energy at both ends. The carbon emissions of the distribution network are the carbon emissions caused by the unit of electricity generated by the distribution network. The carbon emissions mainly come from thermal power generation.

Exemplarily, after S10, the automobile power battery management and control method of this embodiment further includes:

Get driving records;

Evaluate the driving complexity of the target vehicle in each driving time period based on the driving record;

Obtain the weather of the target vehicle during each driving time period and evaluate weather factors;

Calculate the power consumption per unit distance according to the power battery status;

The degree of power battery loss is evaluated based on the driving complexity, weather factors and power consumption per unit distance.

By way of example, the evaluation of power battery loss may be:

In response to C being greater than or equal to C ₀ , evaluate In response to C being less than C ₀ , L=0 is evaluated; where L is the degree of power battery loss, C is the power consumption per unit distance, and C ₀ is the preset power consumption benchmark, is the driving complexity, and Ω is the weather factor.

Generally speaking, The value range is (0,1], and the value range of Ω is [0.1,1]. For example, in dense fog weather, Ω is 0.3, in hail weather, Ω is 0.1, and in sunny weather, Ω is 1.

Illustratively, after evaluating the degree of power battery loss based on the driving complexity, weather factors, and power consumption per unit distance, the automotive power battery management and control method of this embodiment further includes:

In response to the power battery loss being greater than the loss threshold, a battery replacement instruction is issued to the target vehicle.

Embodiments of the present application provide a power battery replacement method. This method can assess the status level of the power battery based on driving records, assess the loss level of the power battery based on battery charge and discharge data, and finally rate the loss level based on the obtained loss level. Choose a battery replacement strategy based on merit.

Compared with related technologies, embodiments of the present application provide a method for managing and controlling automobile power batteries. Since the equivalent amount of carbon emissions of the distribution network means the amount of carbon emissions caused by the power generation equipment when the distribution network provides electric energy for charging equipment, then through Calculate and compare the equivalent carbon emissions of the distribution network for each unit of charging completed by each charging device under different charging periods, and use this as a basis to formulate vehicle power battery charging plans for users, and try to avoid the main power supply mode of the power supply network being thermal power supply. Charging electric vehicles at any time, thereby effectively reducing carbon emissions.

Referring to Figure 2, one embodiment of the present application provides an automotive power battery management and control system, including a battery management and control system 20 applying the automotive power battery management and control method as described above, a plurality of charging devices 30, a security gateway 21 and a router 31.

Wherein, the battery management and control system 20 is connected to the safety gateway 21, and multiple charging devices 30 are connected to the safety gateway 21 through a route 31; each charging device 30 receives a signal from the battery. The management and control system 20 sends corresponding prompt information to the target vehicle after issuing a charging instruction or a battery replacement instruction.

By way of example, the plurality of charging devices 30 are charging piles.

A charging operation management platform can be established on the battery management and control system 20 to provide new energy electric vehicle charging pile operators with charging operation management services for charging stations/piles, new energy vehicle owners, and partners. Under the premise, functional modules such as sub-operators, promotional activities, terminal management, financial settlement, data statistics, refunds, transfers, platform access providers, and big data analysis can be expanded to lead the field of new energy electric vehicle facility charging operation management.

The operation data of the battery management and control system 20 is obtained from the analysis of the security gateway 21: the operation data is obtained by decrypting and analyzing the charging pile working data received from the terminal 31 by the security gateway 21. The battery management and control system 20 combines the obtained charging piles to provide users with The service information provided allows the charging operation management platform to obtain the working status of charging piles in real time, accurately and safely, and use this as a basis to carry out intelligent comprehensive services based on charging piles.

Compared with the existing technology, the embodiment of the present application provides an automobile power battery management and control system. Since the equivalent amount of carbon emissions of the distribution network means the amount of carbon emissions caused by the power generation equipment when the distribution network provides electric energy for charging equipment, then By calculating and comparing the equivalent carbon emissions of the distribution network for each unit of charging completed by each charging device under different charging periods, we can use this as a basis to formulate a vehicle power battery charging plan for users, and try to avoid the main power supply mode of the power supply network being fire power. Charge electric vehicles when power is supplied, thereby effectively reducing carbon emissions.

In addition, this solution uses the car's power battery loss level to promptly replace or provide early warning prompts for power batteries at the end of their life, ensuring the stability of car driving while reducing carbon emissions.

Claims

A car power battery management and control method, including:

Obtain the charging service record and power battery status of the target vehicle;

According to the charging service record, confirm the corresponding charging equipment, charging period and charging amount each time the target vehicle uses the charging service within the preset time period; the charging period refers to the time when the target vehicle uses the charging service. The time period at , each time period is equal in length;

According to the corresponding charging equipment, charging period and charging amount each time the target vehicle uses the charging service, calculate the equivalent amount of carbon emissions per unit charging amount completed by the corresponding charging equipment during the charging period, and obtain the carbon emissions equivalent of all charging equipment at different charging times. The equivalent amount of carbon emissions from the distribution network per unit of charging completed during the period; the equivalent amount of carbon emissions refers to the carbon emissions caused by the power generation equipment when the distribution network provides electric energy for charging equipment;

Compare the equivalent amount of distribution network carbon emissions per unit of charging completed by each charging device under different charging periods, and select the charging period corresponding to the smallest equivalent amount of carbon emissions in the distribution network as the optimal charging period for the equipment;

In response to the target vehicle passing by a charging device within the optimal charging period of the device and the power battery status showing that the remaining power is less than the first threshold, a charging instruction is issued to the target vehicle.
The automobile power battery management and control method according to claim 1, further comprising:

In response to the power battery status showing that the remaining power is less than the second threshold, assign the nearest charging device to the target vehicle and issue a charging instruction to the target vehicle.
The automobile power battery management and control method according to claim 2, after obtaining the charging service record and power battery status of the target vehicle, the method further includes: obtaining driving records.
The automobile power battery management and control method according to claim 3, after obtaining the driving record, the method further includes:

Evaluate the driving complexity of the target vehicle in each driving time period based on the driving records;

Obtain the weather of the target vehicle during each driving time period and evaluate weather factors;

Calculate the power consumption per unit distance according to the power battery status;

The degree of power battery loss is evaluated based on the driving complexity, weather factors and power consumption per unit distance.
The automobile power battery management and control method according to claim 4, wherein said evaluating the degree of power battery loss includes:

In response to C being greater than or equal to C 0 , evaluate In response to C being less than C 0 , L=0 is evaluated;

Among them, L is the power battery loss level, C is the power consumption per unit distance, C 0 is the preset power consumption benchmark, is the driving complexity, and Ω is the weather factor.
The automobile power battery management and control method according to claim 4, after evaluating the degree of power battery loss based on the driving complexity, weather factors and power consumption per unit distance, the method further includes:

In response to the power battery loss being greater than the loss threshold, a battery replacement instruction is issued to the target vehicle.
The automobile power battery management and control method according to claim 1, wherein the corresponding charging equipment, charging period and charging amount are calculated according to the corresponding charging equipment, charging period and charging amount each time the target vehicle uses the charging service, and the corresponding charging equipment is calculated under the charging period. The equivalent amount of carbon emissions per unit charging amount is obtained by obtaining the equivalent amount of distribution network carbon emissions per unit charging amount completed by all charging equipment under different charging periods, including:

Calculate the line transfer rate based on the power supply provided by the distribution network for the corresponding charging equipment and the target vehicle charging amount;

According to the corresponding target vehicle charging amount, the line transfer rate and the carbon emissions of the distribution network during the charging period, the equivalent amount of carbon emissions per unit of charging completed by the corresponding charging equipment during the charging period is calculated.
The automobile power battery management and control method according to claim 7, wherein the calculation of the equivalent amount of carbon emissions per unit of charging completed by the corresponding charging equipment during the charging period includes:

The equivalent amount of carbon emissions per unit of charging amount = (carbon emissions of the distribution network)/(line transfer rate * charging amount).
An automobile power battery management and control system, including a battery management and control system applying the automobile power battery management and control method described in claims 1-8, a plurality of charging devices, a safety gateway and a router;

Wherein, the battery management and control system is connected to the safety gateway, and the plurality of charging devices are connected to the safety gateway through routing; each charging device receives a charging instruction or a battery replacement instruction from the battery management and control system. Then send corresponding prompt information to the target vehicle.
The automobile power battery management and control system of claim 9, wherein the plurality of charging devices are charging piles.