阅读说明：本技术 一种新能源汽车自动更换动力电池方法及系统 (Method and system for automatically replacing power battery of new energy automobile ) 是由 裴祥 胡杜 宋鹏飞 欧阳元准 胡路 姜晓博 于 2021-09-29 设计创作，主要内容包括：本发明属于新能源汽车技术领域,具体提供一种新能源汽车自动更换动力电池方法及系统,车辆端蓝牙作为从机,换电站端蓝牙作为主机。车机电控设备开启,即ACC打开时,车辆的换电控制器开启蓝牙,启动扫描模式,将VIN信息定时广播,等待换电站主机连接。当车辆即将进入换电站时,换电站闸机摄像头识别到车牌后自动关联该车VIN。换电站蓝牙主机设备搜索连接蓝牙名称为VIN的换电控制器设备。连接成功后,读取车机参数,获取车辆状态信息。当车辆状态满足时,则可以开始进入换电操作。该方案逻辑简单易实现,采用业界成熟的蓝牙无线通信方案,不依赖第三方网络。低延时,确保数据交互的实时性。并且传输距离有限,安全可靠。(The invention belongs to the technical field of new energy automobiles, and particularly provides a method and a system for automatically replacing a power battery of a new energy automobile. When the vehicle electric control equipment is started, namely the ACC is started, the battery replacement controller of the vehicle starts the Bluetooth, a scanning mode is started, VIN information is broadcasted at regular time, and the connection of a host computer of a battery replacement station is waited. When the vehicle is about to enter the power exchanging station, the gate camera of the power exchanging station automatically associates with the VIN after recognizing the license plate. And the battery replacement station Bluetooth host equipment searches for battery replacement controller equipment connected with the Bluetooth with the name of VIN. And after the connection is successful, reading the vehicle-mounted machine parameters to acquire the vehicle state information. When the vehicle state is satisfied, the battery replacement operation can be started. The scheme is simple in logic and easy to realize, adopts a Bluetooth wireless communication scheme mature in the industry, and does not depend on a third-party network. And the real-time performance of data interaction is ensured due to low delay. And the transmission distance is limited, and the method is safe and reliable.)

1. A method for automatically replacing a power battery of a new energy automobile is characterized by comprising the following steps:

s001, before the vehicle enters the battery replacement station, starting the Bluetooth of the vehicle as a vehicle Bluetooth slave, wherein the Bluetooth is named as the VIN (vehicle identification number) of the vehicle;

s002, recognizing the license plate by the battery replacement station barrier gate camera and reading the VIN;

s003, the Bluetooth host of the battery replacement station scans and connects the Bluetooth with the VIN name to uniquely pair the vehicle;

s004, after the Bluetooth connection is successfully matched, the battery replacement station acquires a communication key;

s005, after the key verification is passed, the battery replacement station sends an instruction to acquire the vehicle state and the battery parameters before battery replacement;

s006, after the vehicle state meets the requirement, issuing a high-voltage command, and issuing a low-voltage command after the vehicle state succeeds;

and S007, finally, starting battery replacement operation and obtaining battery parameters after battery replacement.

2. The method for automatically replacing the power battery of the new energy automobile according to claim 1, wherein the S002 specifically comprises: before a vehicle enters a station, a barrier gate camera reads a license plate, and VIN of the corresponding vehicle is obtained through automatic matching; if the acquisition fails, the voice prompts workers to manually scan codes, enter codes and match the codes.

3. The method for automatically replacing the power battery of the new energy automobile according to claim 1, wherein the S004 specifically comprises: when the UUID and the broadcast data format of the switching station Bluetooth host and the vehicle Bluetooth slave are matched, data communication can be established, and the connection matching is successful.

4. The method for automatically replacing the power battery of the new energy automobile as claimed in claim 3, wherein the data communication adopts a Kaiser encryption mode, namely, an offset is added to plaintext data, after connection and matching are successful, the automobile obtains a secret key of the battery replacement station through the plaintext, encryption and decryption are performed after the secret key is obtained, data interaction can be performed only after analysis is performed according to a specified protocol format, and safety authentication is successful.

5. The method for automatically replacing the power battery of the new energy automobile according to claim 4, wherein the step S005 specifically comprises the following steps: after the safety certification is successful, the battery replacement station road gate lifts the rod, the vehicle is allowed to enter the battery replacement station, the vehicle is hung in the N gear after entering the battery replacement platform, the battery replacement station sends a vehicle stop instruction and voice prompt after acquiring the vehicle state and the gear, and a driver gets off the vehicle.

6. The method for automatically replacing a power battery of a new energy automobile according to claim 5, wherein the step S005 of acquiring the vehicle state by the battery replacement station specifically comprises the steps of: after the vehicle is ready to enter the station, the battery replacement station acquires vehicle state parameters including a running preparation state, a gear state, an EPB (electronic parking brake system) state, a brake pedal state, a battery connection state, a high-low voltage connection state, a vehicle door state and a steering wheel angle in a period of 500 ms.

7. The method for automatically replacing the power battery of the new energy automobile according to claim 6, wherein the step S006 that the vehicle state meets the requirement comprises the following steps: the steering wheel is in a return state, the vehicle door is completely closed, the EPB is unlocked, the vehicle is in a ready state, and the power battery is in a connection state.

8. The method for automatically replacing the power battery of the new energy automobile according to claim 1, wherein the S007 specifically comprises: after low pressure is applied, the vehicle is confirmed to be accurately positioned, wheels are locked, and the vehicle is lifted up by the lifting mechanism; opening a battery locking switch, and disassembling the battery; and the battery replacement controller detects the connection state of the battery, removes the old battery after the connection is disconnected and replaces the new battery, and closes the battery locking switch after the battery connection is detected successfully, so that the battery replacement is finished.

9. The method for automatically replacing the power battery of the new energy automobile according to claim 8, wherein the step S007 is followed by further comprising: after the battery is replaced, the lifting mechanism resets, and the wheels are unlocked; acquiring a current battery serial number, acquiring current battery residual energy and current battery health degree, completing background charging, and paying by voice prompt; and after payment is finished, a driver gets on the bus, the battery replacement station sends a battery replacement finishing instruction, the VCU releases EPB shielding, the barrier gate lifts the rod, and the bus is driven out.

10. The system for automatically replacing the power battery of the new energy automobile is used for implementing the method for automatically replacing the power battery of the new energy automobile according to any one of claims 1 to 9, and specifically comprises the following steps:

the whole vehicle control system is used for realizing communication by connecting and matching the Bluetooth with the battery replacement station;

and the battery replacement station pairing module is used for identifying the vehicle and starting battery replacement operation after the vehicle state is confirmed to be successful.

Technical Field

The invention relates to the technical field of new energy automobiles, in particular to a method and a system for automatically replacing a power battery of a new energy automobile.

Background

The biggest short board of the electric automobile is inconvenient and slow in charging. Taking tesla Model S75D as an example, the charging time of the tesla super charging pile can be accepted, because the super charging pile uses 380V dc, the charging time can be greatly shortened. With a super charging station, 20 minutes would fill half, and 80 minutes would fill completely. Even so, compared with the fuel vehicle only needing several minutes to refuel once, the charging time of the electric vehicle is too long and is unacceptable for most customers. And the quick charging needs the support of a high-power charging pile, and the pressure on a power grid is not small when a large number of vehicles are charged simultaneously.

This problem persists until there is no revolutionary advance in battery and charging technology. In terms of the current technical means, the capacity of the battery in unit volume cannot obtain a large breakthrough, and the rapid charging technology cannot obtain a breakthrough in a short time, so that a new method can be developed, and the scheme of changing the battery is adopted to rapidly supplement energy for the vehicle. The scheme of changing the battery can achieve two aims: 1. the problem of slow charging is solved, and in an automatic mode, the battery is generally changed for only a few minutes in normal conditions, and the time for refueling a fuel vehicle is almost the same; 2. the battery that gets off of changing can charge when the power consumption low ebb, when reducing the charging cost, has also reduced the pressure to charging electric wire netting.

At present, partial automobile models of partial automobile manufacturers support replacement of power batteries, only manual operation is needed, and automatic execution cannot be achieved. Because various state parameters of the vehicle need to be acquired before the battery is replaced, the battery replacement is not allowed when the state is not met, and danger may exist. The state parameters need to be confirmed manually one by one, the speed is low, and the efficiency is low.

In addition, some automobile manufacturers use an automatic battery replacement scheme. In the scheme, the vehicle parameter state is transmitted to an internet server through a power conversion controller and then transferred to a background of a power conversion station. The scheme depends on a network and a server, and under the condition of poor network state, the real-time performance of data communication is difficult to guarantee, so that the smooth operation of battery replacement is influenced.

Disclosure of Invention

The invention aims to solve the technical problem of low charging efficiency of the electric automobile in the prior art.

The invention provides a method for automatically replacing a power battery of a new energy automobile, which comprises the following steps:

s001, before the vehicle enters the battery replacement station, starting the Bluetooth of the vehicle as a vehicle Bluetooth slave, wherein the Bluetooth is named as the VIN (vehicle identification number) of the vehicle;

s002, recognizing the license plate by the battery replacement station barrier gate camera and reading the VIN;

s003, the Bluetooth host of the battery replacement station scans and connects the Bluetooth with the VIN name to uniquely pair the vehicle;

s004, after the Bluetooth connection is successfully matched, the battery replacement station acquires a communication key;

s005, after the key verification is passed, the battery replacement station sends an instruction to acquire the vehicle state and the battery parameters before battery replacement;

s006, after the vehicle state meets the requirement, issuing a high-voltage command, and issuing a low-voltage command after the vehicle state succeeds;

and S007, finally, starting battery replacement operation and obtaining battery parameters after battery replacement.

Optionally, the S002 specifically includes: before a vehicle enters a station, a barrier gate camera reads a license plate, and VIN of the corresponding vehicle is obtained through automatic matching; if the acquisition fails, the voice prompts workers to manually scan codes, enter codes and match the codes.

Optionally, the S004 specifically includes: when the UUID and the broadcast data format of the switching station Bluetooth host and the vehicle Bluetooth slave are matched, data communication can be established, and the connection matching is successful.

Optionally, the data communication adopts a Kaiser encryption mode, that is, an offset is added to plaintext data, after connection and matching are successful, the vehicle acquires a secret key of the power conversion station through the plaintext, performs encryption and decryption after the secret key is acquired, and performs data interaction only by analyzing according to a specified protocol format, so that successful security authentication is realized.

Optionally, the S005 specifically includes: after the safety certification is successful, the battery replacement station road gate lifts the rod, the vehicle is allowed to enter the battery replacement station, the vehicle is hung in the N gear after entering the battery replacement platform, the battery replacement station sends a vehicle stop instruction and voice prompt after acquiring the vehicle state and the gear, and a driver gets off the vehicle.

Optionally, the step S005 of acquiring the vehicle state by the battery replacement station specifically includes: after the vehicle is ready to enter the station, the battery replacement station acquires vehicle state parameters including a running preparation state, a gear state, an EPB (electronic parking brake system) state, a brake pedal state, a battery connection state, a high-low voltage connection state, a vehicle door state and a steering wheel angle in a period of 500 ms.

Optionally, the meeting of the vehicle state requirement in S006 includes: the steering wheel is in a return state, the vehicle door is completely closed, the EPB is unlocked, the vehicle is in a ready state, and the power battery is in a connection state.

Optionally, the S007 specifically includes: after low pressure is applied, the vehicle is confirmed to be accurately positioned, wheels are locked, and the vehicle is lifted up by the lifting mechanism; opening a battery locking switch, and disassembling the battery; and the battery replacement controller detects the connection state of the battery, removes the old battery after the connection is disconnected and replaces the new battery, and closes the battery locking switch after the battery connection is detected successfully, so that the battery replacement is finished.

Optionally, the S007 is followed by: after the battery is replaced, the lifting mechanism resets, and the wheels are unlocked; acquiring a current battery serial number, acquiring current battery residual energy and current battery health degree, completing background charging, and paying by voice prompt; and after payment is finished, a driver gets on the bus, the battery replacement station sends a battery replacement finishing instruction, the VCU releases EPB shielding, the barrier gate lifts the rod, and the bus is driven out.

The invention also provides a system for automatically replacing the power battery of the new energy automobile, which is used for implementing the method for automatically replacing the power battery of the new energy automobile and specifically comprises the following steps:

the whole vehicle control system is used for realizing communication by connecting and matching the Bluetooth with the battery replacement station;

and the battery replacement station pairing module is used for identifying the vehicle and starting battery replacement operation after the vehicle state is confirmed to be successful.

Has the advantages that: the invention provides a method and a system for automatically replacing a power battery of a new energy automobile. When the vehicle electric control equipment is started, namely the ACC is started, the battery replacement controller of the vehicle starts the Bluetooth, a scanning mode is started, VIN information is broadcasted at regular time, and the connection of a host computer of a battery replacement station is waited. When the vehicle is about to enter the power exchanging station, the gate camera of the power exchanging station automatically associates with the VIN after recognizing the license plate. And the battery replacement station Bluetooth host equipment searches for battery replacement controller equipment connected with the Bluetooth with the name of VIN. And after the connection is successful, reading the vehicle-mounted machine parameters to acquire the vehicle state information. When the vehicle state is satisfied, the battery replacement operation can be started. The scheme is simple in logic and easy to realize, adopts a Bluetooth wireless communication scheme mature in the industry, and is independent of a third-party network, such as a base station signal, the Internet, a server and the like. And the real-time performance of data interaction is ensured due to low delay. And the transmission distance is limited, so that the method is safe and reliable.

Drawings

FIG. 1 is a flow chart of a method for automatically replacing a power battery of a new energy automobile according to the invention;

fig. 2 is a hardware block diagram of the new energy vehicle for automatically replacing the power battery provided by the invention.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

As shown in fig. 1, an embodiment of the present invention provides a method for automatically replacing a power battery of a new energy vehicle, including the following steps:

s001, before the vehicle enters the battery replacement station, starting the Bluetooth of the vehicle as a vehicle Bluetooth slave, wherein the Bluetooth is named as the VIN (vehicle identification number) of the vehicle;

s002, recognizing the license plate by the battery replacement station barrier gate camera and reading the VIN;

s003, the Bluetooth host of the battery replacement station scans and connects the Bluetooth with the VIN name to uniquely pair the vehicle;

s004, after the Bluetooth connection is successfully matched, the battery replacement station acquires a communication key;

s005, after the key verification is passed, the battery replacement station sends an instruction to acquire the vehicle state and the battery parameters before battery replacement;

s006, after the vehicle state meets the requirement, issuing a high-voltage command, and issuing a low-voltage command after the vehicle state succeeds;

and S007, finally, starting battery replacement operation and obtaining battery parameters after battery replacement.

The Vehicle Identification Number (or frame Number), referred to as VIN for short, is a unique set of numbers for use in automobiles, and can identify the manufacturer, engine, chassis serial Number, and other performance data of the automobile.

The operating vehicles have unique license plates, and the background database of the power station is stored with the corresponding relation between the license plates and the VIN codes. Before the vehicle enters the station, the barrier gate camera reads the license plate, and the VIN of the corresponding vehicle is automatically obtained through matching. And if the acquisition fails, the voice prompts workers to manually scan codes, enter and match the codes. The Bluetooth slave machine with the name of VIN, namely the Bluetooth equipment of the battery replacement controller installed on the vehicle body, is searched by the battery replacement station Bluetooth host machine. And initiating connection after the search is successful, and if the connection fails, carrying out voice prompt on-site working personnel for processing by the power station.

Communication security needs to be placed at the top, so UUID and broadcast data format of bluetooth communication needs to be specified. Data communication can be established only if the Bluetooth master-slave machine UUID is matched with the broadcast data format.

The application layer data communication adopts a Kaiser encryption mode, namely, an offset is added to plaintext data. Therefore, after the connection is successful, the key of the power conversion controller needs to be obtained through plaintext after the communication is established. And after the key is obtained, encryption and decryption are carried out, and data interaction can be carried out only by analyzing according to a specified protocol format, so that the successful safety authentication is realized.

And after the safety certification is successful, the battery replacement station road gate lifts the rod to allow the vehicle to enter the battery replacement station. And (4) after the vehicle enters the battery replacement platform, the vehicle is in N gear. After the battery replacement station acquires the state and the gear of the vehicle, a command for stopping the vehicle on the battery replacement platform is sent and voice prompt is given, and the driver gets off the vehicle. And the power swapping controller receives the instruction and then forwards the instruction to the VCU, and the VCU shields the EPB. The battery replacement platform adjusts the position of the vehicle to ensure the accurate positioning of the battery box.

After the vehicle is ready to enter the station, the battery replacement station acquires vehicle state parameters such as a driving preparation state, a gear state, an EPB (electronic parking brake system, English full name: electric park brake) state, a brake pedal state, a battery connection state, a high-low voltage connection state, a vehicle door state and a steering wheel angle in a period of 500 ms. The steering wheel needs to be righted, the vehicle door is completely closed, the EPB is unlocked, the vehicle needs to be in a ready state, and the power battery is in a connection state.

And if the state is abnormal, prompting the staff to process by voice. And if no abnormity exists, a high-voltage command is issued, namely the power battery is disconnected for power supply. When the voltage of the power battery is gradually reduced at the lower high voltage, the lower high voltage is considered to be successful when the voltage is lower than 5V, the time may be 1 to 2 minutes, and the power battery voltage state is periodically detected by the power station during the time. If the high voltage is failed to be lowered, the voice prompts workers to manually lower the high voltage.

And issuing a low-voltage command after the high voltage is successfully applied. And after receiving a low-voltage command, powering off the vehicle, namely, a flameout state. When the battery replacement station detects that the ACC is closed, the low voltage is successfully lowered. If the low pressure fails, the staff is prompted by voice to turn off the ACC manually. At this point, the battery replacement preparation process is completed.

After low pressure is applied, the vehicle is confirmed to be accurately positioned, wheels are locked, and the lifting mechanism lifts the vehicle. And opening a battery locking switch and disassembling the battery. And the battery replacement controller detects the connection state of the battery, removes the old battery after the connection is disconnected and replaces the new battery, and closes the battery locking switch after the battery connection is detected successfully, so that the battery replacement is finished.

After the battery is replaced, the lifting mechanism resets, and the wheels are unlocked. And acquiring a current battery serial number, acquiring current battery residual energy, acquiring current battery health degree, completing background charging and prompting by voice. The driver can pay by scanning the code, and also pay the electricity replacement cost by cash or swiping a card. And (4) when a driver gets on the bus, the battery replacement station sends a battery replacement completion instruction, and the VCU releases the EPB shielding. And lifting the rod by the barrier gate, and moving the vehicle out to finish the battery replacement.

In the process of replacing the battery of the vehicle, people cannot get on or off the vehicle to ensure safety. Therefore, the state of the vehicle door is acquired at a period of 500ms in the power changing process, and if the vehicle door is found to be opened, the power changing is immediately suspended, and the voice prompt is carried out.

Considering that the situation that the user enters the power swapping station but does not actually perform the power swapping operation, the user directly exits the power swapping station. At this time, the EPB is also in a shielding state, and a dangerous situation of rolling while parking may occur. Therefore, when the power swapping controller detects that the vehicle speed is available and the EPB is shielded, the power swapping controller sends a command to the VCU to release the EPB shielding.

In order to monitor the change of vehicle parameters in real time, the vehicle problem is convenient to track. And the battery replacement controller collects the key data of the whole vehicle in real time. Such as vehicle speed, mileage, gear, braking, total power cell voltage and current, and power cell voltage and temperature. And uploading the data to a national new energy automobile data platform periodically according to a GB/T32960 protocol.

When a serious fault is detected, namely three-level alarm is triggered, the controller uploads 60 seconds of data before and after the fault is triggered to the background for background big data analysis.

And when the vehicle ACC is detected to be in the closed state, initiating a logout operation, and disconnecting the background server. After the ACC is detected to be closed, if the Bluetooth is in a connection state, the vehicle is in a battery replacement process. And if the Bluetooth is in the unconnected state, entering a low-power consumption dormant state.

The embodiment of the invention also provides a system for automatically replacing the power battery of the new energy automobile, which is used for implementing the method for automatically replacing the power battery of the new energy automobile, and specifically comprises the following steps:

the whole vehicle control system is used for realizing communication by connecting and matching the Bluetooth with the battery replacement station;

and the battery replacement station pairing module is used for identifying the vehicle and starting battery replacement operation after the vehicle state is confirmed to be successful.

It should be noted that, in the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to relevant descriptions of other embodiments for parts that are not described in detail in a certain embodiment.

The method for automatically replacing the power battery of the new energy automobile is as described above, and is not described herein again.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.