A remotely controlled electric vehicle current and power limiting system

Abstract

The present invention relates to the field of electric vehicle technology, specifically to a system and method for limiting electric vehicle current and power that can be remotely controlled. The system includes an electric vehicle and a management terminal, wherein the management terminal is connected to the electric vehicle via remote service, the management terminal includes a connected server and a management platform, the management platform is used to send power-limiting instructions, a lithium battery BMS and an electric vehicle networking locator are provided in the electric vehicle, and both the lithium battery BMS and the electric vehicle networking locator are provided with a bus communication module, and the two bus communication modules are connected to each other. In the present invention, the riding of the electric vehicle can be effectively restricted after the lease expires; the electric vehicle networking locator can still work normally after the lease expires; and after the tenant renews the lease, the management personnel can remotely cancel the electric vehicle power restriction without having to go to the customer's site to handle it, which greatly saves labor costs.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to a current and power limiting system for electric vehicles that can be remotely controlled. Background Art

[0002] With the continuous advancement of urbanization and the continuous improvement of people's living standards, people have put forward more appropriate requirements for transportation and travel methods. The rapid development of the electric bicycle industry has effectively alleviated the traffic pressure for short- and medium-distance travel in my country. As a result, the electric bicycle industry has received widespread attention and strong support from the government. At the same time, electric bicycles are very popular among the public due to their economical, energy-saving, and convenient advantages.

[0003] However, for people in certain industries, purchasing an electric vehicle is clearly uneconomical and carries the risk of loss. This is especially true for the tens of millions of people working in logistics, food delivery, and other delivery industries, who form the largest service workforce in first- and second-tier cities. Electric vehicles are their lifeblood. When their workplaces don't provide them with vehicles, they often have to buy their own or pay a hefty deposit to rent one. Furthermore, due to their long work hours, the long range of electric vehicles, and their high demands, the high cost of purchasing a large-battery electric vehicle, coupled with the high wear and tear of both the vehicle and the battery, significantly increases their vehicle costs.

[0004] In this context, short-term or medium-term rentals of electric vehicles can reduce the cost of using them and their batteries. Any problems with the vehicles or batteries can also be quickly resolved, facilitating unified management for operators and improving efficiency and revenue for delivery personnel. When an electric vehicle's battery life falls short of its intended range, it can be replaced with a new one with less wear and tear, allowing for regular "new" rides. Therefore, electric vehicle rentals are a very broad field.

[0005] A common management technique for electric vehicle rentals is to disconnect the entire vehicle from the user's rental period, prohibiting further use. However, this approach has several drawbacks. First, a sudden power outage during a ride can pose a safety hazard. Second, a power outage disconnects the vehicle from the management server. Even if the user renews their subscription, power cannot be restored, requiring on-site staff to restore the vehicle's power, significantly increasing workload and labor costs. Therefore, we propose a remotely controlled electric vehicle current and power limiting system. Summary of the Invention

[0006] The object of the present invention is to provide an electric vehicle current and power limiting system that can be remotely controlled to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions: a remotely controlled electric vehicle current and power limiting system, comprising an electric vehicle and a management terminal, wherein the management terminal is connected to the electric vehicle via a remote service;

[0008] The management terminal includes a connected server and a management platform, and the management platform is used to send power-limiting instructions;

[0009] The electric vehicle is provided with a lithium battery BMS and an electric vehicle networking locator. Both the lithium battery BMS and the electric vehicle networking locator are provided with a bus communication module. The two bus communication modules are connected to each other. The electric vehicle networking locator is provided with a mobile communication module. The mobile communication module is connected to the bus communication module located in the electric vehicle networking locator. The mobile communication module is connected to the server through the remote service. The electric vehicle networking locator is used to send the instructions received from the management platform to the lithium battery BMS.

[0010] The present invention also discloses a method for limiting current and power of an electric vehicle that can be remotely controlled according to the above method. The method includes the following operations: first setting power limiting parameters, then turning on the power limiting mode, and finally turning off the power limiting mode.

[0011] Preferably, the setting of power limiting parameters includes the following steps:

[0012] Step 1: The administrator inputs power limiting parameters on the current and power limiting interface of the management platform. The power limiting parameters include the current limit and the BMS discharge MOS shutdown time after the current exceeds the limit;

[0013] Step 2. The administrator clicks the Set Power Limit Parameters button;

[0014] Step 3: The management server sends a setting power limit parameter instruction and power limit parameters to the electric vehicle network locator;

[0015] Step 4: The electric vehicle network locator receives the power limit parameter setting instruction and power limit parameters and forwards them to the lithium battery BMS;

[0016] Step 5: After receiving the power limit parameter setting instruction and the power limit parameters, the lithium battery BMS determines whether the power limit parameters are reasonable. If so, it returns a setting success; otherwise, it returns a setting failure.

[0017] Step 6: The electric vehicle network locator receives the returned result and remotely pushes it to the management server;

[0018] Step 7: The management platform displays the setting result.

[0019] Preferably, the starting of the power-limiting mode includes manually issuing a power-limiting instruction and automatically issuing a power-limiting instruction, and the lithium battery BMS entering the power-limiting mode.

[0020] Preferably, the manual issuance of the power restriction instruction includes the following steps:

[0021] Step 1: The manager finds the number of the electric vehicle that needs to be restricted;

[0022] Step 2. The administrator clicks to enter the power-limiting mode;

[0023] Step 3: The management server sends a power restriction instruction to the electric vehicle network locator;

[0024] Step 4: The electric vehicle network locator receives the power restriction instruction and forwards it to the lithium battery BMS;

[0025] Step 5: After receiving the power-limiting instruction, the lithium battery BMS enters the power-limiting state and returns to the power-limiting state;

[0026] Step 6: The electric vehicle network locator receives the returned result and remotely pushes it to the management server;

[0027] Step 7: The management terminal displays whether the electric vehicle is in a power-limited state.

[0028] Preferably, the automatic issuance of the power restriction instruction includes the following steps:

[0029] Step 1: The management terminal monitors in real time whether the electric vehicle tenants are in arrears;

[0030] Step 2: If the tenant is found to be in arrears, the management terminal will automatically issue a power restriction instruction;

[0031] Step 3: The management server sends a power restriction instruction to the electric vehicle network locator;

[0032] Step 4: The electric vehicle network locator receives the power restriction instruction and forwards it to the lithium battery BMS;

[0033] Step 5: After receiving the power-limiting instruction, the lithium battery BMS enters the power-limiting state and returns to the power-limiting state;

[0034] Step 6: The electric vehicle network locator receives the returned result and remotely pushes it to the management server;

[0035] Step 7: The management terminal displays whether the electric vehicle is in a power-limited state.

[0036] Preferably, the lithium battery BMS enters the power-limiting mode including the following steps:

[0037] Step 1: After receiving the instruction to set the power limit parameters, the lithium battery BMS modifies the power limit parameters. If no instruction to set the power limit parameters is received, the default parameters are maintained.

[0038] Step 2: After receiving the power-limiting instruction, the lithium battery BMS enters the power-limiting mode;

[0039] Step 3: After the lithium battery BMS enters the power-limiting mode, it starts current monitoring. If the lithium battery discharge current exceeds the set power-limiting current, the lithium battery BMS turns off the discharge MOS and prohibits the lithium battery from discharging externally.

[0040] Step 4: The lithium battery BMS turns off the discharge MOS and starts timing. When the timing exceeds the set over-limit MOS closing time, the discharge MOS is automatically turned on. At this time, the lithium battery BMS is still in the power-limiting state.

[0041] Preferably, the power-limiting mode shutdown includes manually issuing a power-limiting exit instruction and automatically issuing a power-limiting exit instruction, and the manual issuance of the power-limiting exit instruction includes the following steps:

[0042] Step 1: The administrator finds the number of the electric vehicle that needs to be exempted from power restriction;

[0043] Step 2. The administrator clicks to exit the power-limiting mode;

[0044] Step 3: The management server sends an exit power restriction instruction to the electric vehicle network locator;

[0045] Step 4: The electric vehicle network locator receives the exit power restriction instruction and forwards it to the lithium battery BMS;

[0046] Step 5: After receiving the exit power limit instruction, the lithium battery BMS exits the power limit mode and returns to the power limit state;

[0047] Step 6: The electric vehicle network locator receives the returned result and remotely pushes it to the management server;

[0048] Step 7: The management terminal displays whether the electric vehicle is in a power-limited state.

[0049] Preferably, in the step of setting the power limiting parameters, the power limiting current size is divided into the following levels: no riding, low speed riding allowed and medium speed riding allowed, so as to provide a more flexible current and power limiting management mode, and the power limiting current size is set according to the actual current parameters of the electric vehicle.

[0050] Preferably, in the step of the lithium battery BMS entering the power-limiting mode, the lithium battery BMS entering the power-limiting state does not affect the lithium battery's power supply to the electric vehicle networking locator, and the electric vehicle networking locator can receive instructions issued by the server and send instructions to the lithium battery BMS.

[0051] In summary, the beneficial effects of the present invention are:

[0052] In the present invention, the riding of electric vehicles by tenants can be effectively restricted after the lease is overdue; the networked locator of the electric vehicle can still work normally after the lease is overdue; after the tenant renews the lease, the management personnel can remotely cancel the power restriction of the electric vehicle without having to go to the customer's site to handle it, which greatly saves labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0054] Figure 1 It is a topological diagram of the remote current and power limiting system implemented by the present invention;

[0055] Figure 2 This is a schematic diagram of the communication between the electric vehicle network locator and the lithium battery BMS implemented by the present invention;

[0056] Figure 3 This is a flow chart of setting power limit parameters implemented by the present invention;

[0057] Figure 4 This is a diagram of the power-limiting mode implemented in the present invention;

[0058] Figure 5 This is a diagram of the power-limiting mode implemented by the present invention.

[0059] In the figure: 101, electric vehicle; 102, lithium battery BMS; 103, electric vehicle network locator; 104, management platform; 105, remote service; 108, mobile communication module; 109, bus communication module. DETAILED DESCRIPTION

[0060] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0061] refer to Figure 1-2 The electric vehicle current and power limiting system shown in the figure can be remotely controlled, including an electric vehicle 101 and a management terminal, the management terminal is connected to the electric vehicle 101 through a remote service 105,

[0062] The management end includes a connected server and a management platform 104, which is used to send power-limiting instructions. This system can realize remote management of electric vehicle rentals.

[0063] The electric vehicle 101 is provided with a lithium battery BMS 102 and an electric vehicle networking locator 103. Both the lithium battery BMS 102 and the electric vehicle networking locator 103 are provided with a bus communication module 109. The two bus communication modules 109 are connected to each other. The electric vehicle networking locator is provided with a mobile communication module 108. The mobile communication module 108 is connected to the bus communication module 109 located in the electric vehicle networking locator 103. The mobile communication module 108 is connected to the server through the remote service 105. The electric vehicle networking locator is used to send the instructions received from the management platform 104 to the lithium battery BMS 102.

[0064] refer to Figure 3 A method for limiting current and power of an electric vehicle that can be remotely controlled according to the above is shown, and the method includes the following operations: first setting power limiting parameters, then turning on the power limiting mode, and finally turning off the power limiting mode.

[0065] Setting the power-limiting parameters involves the following steps:

[0066] Step 1: The administrator enters power limiting parameters in the current and power limiting interface of the management platform 104. The power limiting parameters include the current limit and the shutdown time of the lithium battery BMS 102 discharge MOS after the current exceeds the limit;

[0067] Step 2. The administrator clicks the Set Power Limit Parameters button;

[0068] Step 3: The management server sends a setting power limit parameter instruction and power limit parameters to the electric vehicle network locator 103;

[0069] Step 4: The electric vehicle network locator 103 receives the power limit parameter setting instruction and power limit parameters and forwards them to the lithium battery BMS 102;

[0070] Step 5: After receiving the power limit parameter setting instruction and the power limit parameters, the lithium battery BMS 102 determines whether the power limit parameters are reasonable. If so, it returns a successful setting; otherwise, it returns a failed setting.

[0071] Step 6: The electric vehicle network locator 103 receives the returned result and remotely pushes it to the management server;

[0072] Step 7: The management platform 104 displays the setting result.

[0073] like Figure 4 As shown, starting the power-limiting mode includes manually issuing a power-limiting instruction and automatically issuing a power-limiting instruction, and the lithium battery BMS 102 entering the power-limiting mode.

[0074] Manually issuing a power restriction instruction includes the following steps:

[0075] Step 1: The manager finds the number of the electric vehicle that needs to be restricted;

[0076] Step 2. The administrator clicks to enter the power-limiting mode;

[0077] Step 3: The management server sends a power restriction instruction to the electric vehicle network locator 103;

[0078] Step 4: The electric vehicle network locator 103 receives the power restriction instruction and forwards it to the lithium battery BMS 102;

[0079] Step 5: After receiving the power-limiting instruction, the lithium battery BMS 102 enters the power-limiting state and returns to the power-limiting state;

[0080] Step 6: The electric vehicle network locator 103 receives the returned result and remotely pushes it to the management server;

[0081] Step 7: The management terminal displays whether the electric vehicle is in a power-limited state.

[0082] Automatically issuing a power restriction instruction includes the following steps:

[0083] Step 1: The management terminal monitors in real time whether the electric vehicle tenants are in arrears;

[0084] Step 2: If the tenant is found to be in arrears, the management terminal will automatically issue a power restriction instruction;

[0085] Step 3: The management server sends a power restriction instruction to the electric vehicle network locator 103;

[0086] Step 4: The electric vehicle network locator 103 receives the power restriction instruction and forwards it to the lithium battery BMS 102;

[0087] Step 5: After receiving the power-limiting instruction, the lithium battery BMS 102 enters the power-limiting state and returns to the power-limiting state;

[0088] Step 6: The electric vehicle network locator 103 receives the returned result and remotely pushes it to the management server;

[0089] Step 7: The management terminal displays whether the electric vehicle is in a power-limited state.

[0090] The lithium battery BMS102 enters the power limit mode including the following steps:

[0091] Step 1: After receiving the instruction to set the power limit parameters, the lithium battery BMS 102 modifies the power limit parameters. If no instruction to set the power limit parameters is received, the default parameters are maintained.

[0092] Step 2: After receiving the power-limiting instruction, the lithium battery BMS 102 enters the power-limiting mode;

[0093] Step 3: After the lithium battery BMS102 enters the power-limiting mode, it turns on current monitoring. If the lithium battery discharge current exceeds the set power-limiting current, the lithium battery BMS102 turns off the discharge MOS and prohibits the lithium battery from discharging externally.

[0094] Step 4: The lithium battery BMS 102 turns off the discharge MOS and starts timing. When the timing exceeds the set over-limit MOS off time, the discharge MOS is automatically turned on. At this time, the lithium battery BMS 102 is still in the power-limited state.

[0095] like Figure 5 As shown, shutting down the power-restriction mode includes manually issuing a power-restriction exit instruction and automatically issuing a power-restriction exit instruction. Manually issuing a power-restriction exit instruction includes the following steps:

[0096] Step 1: The administrator finds the number of the electric vehicle that needs to be exempted from power restriction;

[0097] Step 2. The administrator clicks to exit the power-limiting mode;

[0098] Step 3: The management server sends an exit power restriction instruction to the electric vehicle network locator 103;

[0099] Step 4: The electric vehicle network locator 103 receives the exit power restriction instruction and forwards it to the lithium battery BMS 102;

[0100] Step 5: After receiving the exit power limit instruction, the lithium battery BMS 102 exits the power limit mode and returns to the power limit state;

[0101] Step 6: The electric vehicle network locator 103 receives the returned result and remotely pushes it to the management server;

[0102] Step 7: The management terminal displays whether the electric vehicle is in a power-limited state.

[0103] In step 1 of setting the power limiting parameters, the power limiting current size is divided into the following levels: no riding, low-speed riding allowed, and medium-speed riding allowed, to provide a more flexible current and power limiting management mode. The power limiting current size is set according to the actual current parameters of the electric vehicle.

[0104] In step 2 of the lithium battery BMS102 entering the power-limiting mode, the lithium battery BMS102 entering the power-limiting state does not affect the lithium battery's power supply to the electric vehicle networking locator 103. The electric vehicle networking locator 103 can receive instructions from the server and send instructions to the lithium battery BMS102.

[0105] The implementation of this method can not only make leasing management more convenient and efficient, but also greatly save labor costs.

[0106] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A remotely controlled electric vehicle current and power limiting system, characterized by: It comprises an electric vehicle (101) and a management terminal, wherein the management terminal is connected to the electric vehicle (101) via a remote service (105). The management terminal includes a connected server and a management platform (104), wherein the management platform (104) is used to send power restriction instructions. The electric vehicle (101) is provided with a lithium battery BMS (102) and an electric vehicle networking locator (103), and both the lithium battery BMS (102) and the electric vehicle networking locator (103) are provided with a bus communication module (109), and the two bus communication modules (109) are connected to each other. The electric vehicle networking locator is provided with a mobile communication module (108), and the mobile communication module (108) is connected to the bus communication module (109) located in the electric vehicle networking locator (103). The mobile communication module (108) is connected to the server via the remote service (105), and the electric vehicle networking locator is used to send instructions received from the management platform (104) to the lithium battery BMS (102); The system is implemented based on the following method: This method is a method for limiting the current and power of an electric vehicle (101) that can be remotely controlled: The following steps are included: first, set the power limit parameters, then turn on the power limit mode, and finally turn off the power limit mode; The method of setting the power limit parameters includes the following steps: Step 1: The administrator inputs power limiting parameters on the current and power limiting interface of the management platform (104), wherein the power limiting parameters include the current limit and the time for the lithium battery BMS (102) to discharge the MOS to be turned off after the current exceeds the limit; Step 2. The administrator clicks the Set Power Limit Parameters button; Step 3: The management server sends a setting power limit parameter instruction and power limit parameters to the electric vehicle network locator (103); Step 4: the electric vehicle network locator (103) receives the power limit parameter setting instruction and the power limit parameters and forwards them to the lithium battery BMS (102); Step 5: After receiving the power limit parameter setting instruction and the power limit parameters, the lithium battery BMS (102) determines whether the power limit parameters are reasonable. If so, it returns a setting success; otherwise, it returns a setting failure. Step 6: The electric vehicle network locator (103) receives the returned result and remotely pushes it to the management server; Step 7: The management platform (104) displays the setting result.

2. The electric vehicle current and power limiting system capable of remote control according to claim 1 is characterized in that: The power-limiting mode activation includes manually issuing a power-limiting instruction and automatically issuing a power-limiting instruction, and the lithium battery BMS (102) entering the power-limiting mode.

3. The electric vehicle current and power limiting system capable of remote control according to claim 2 is characterized in that: The manual issuance of the power restriction instruction includes the following steps: Step 1: The manager finds the number of the electric vehicle (101) that needs to be restricted; Step 2. The administrator clicks to enter the power-limiting mode; Step 3: The management server sends a manual power restriction instruction to the electric vehicle network locator (103); Step 4: the electric vehicle network locator (103) receives a manually issued power restriction instruction and forwards it to the lithium battery BMS (102); Step 5: After receiving the manual power-limiting instruction, the lithium battery BMS (102) enters the power-limiting state and returns to the power-limiting state; Step 6: The electric vehicle network locator (103) receives the returned result and remotely pushes it to the management server; Step 7: The management terminal displays whether the electric vehicle (101) is in a power-limited state.

4. The electric vehicle current and power limiting system capable of remote control according to claim 3 is characterized by: The automatic issuance of the power restriction instruction includes the following steps: Step 1: The management terminal monitors in real time whether the electric vehicle (101) tenant has outstanding fees; Step 2: If the tenant is found to be in arrears, the management terminal will automatically issue a power restriction instruction; Step 3: The management server sends an automatic power restriction instruction to the electric vehicle network locator (103); Step 4: the electric vehicle network locator (103) receives the automatically issued power restriction instruction and forwards it to the lithium battery BMS (102); Step 5: After receiving the power-limiting instruction automatically issued, the lithium battery BMS (102) enters the power-limiting state and returns to the power-limiting state; Step 6: The electric vehicle network locator (103) receives the returned result and remotely pushes it to the management server; Step 7: The management terminal displays whether the electric vehicle (101) is in a power-limited state.

5. The electric vehicle current and power limiting system capable of remote control according to claim 4 is characterized in that: The lithium battery BMS (102) enters the power-limiting mode including the following sequential steps: Step 1: After receiving the instruction to set the power limit parameters, the lithium battery BMS (102) modifies the power limit parameters; if no instruction to set the power limit parameters is received, the default parameters are maintained; Step 2: After receiving the power-limiting instruction, the lithium battery BMS (102) enters the power-limiting mode; Step 3: After the lithium battery BMS (102) enters the power-limiting state, current monitoring is turned on. If the discharge current of the lithium battery BMS (102) exceeds the set power-limiting parameter, the lithium battery BMS (102) turns off the discharge MOS, prohibiting the lithium battery from discharging externally. Step 4: The lithium battery BMS (102) starts timing after closing the discharge MOS. When the timing exceeds the set over-limit MOS closing time, the discharge MOS is automatically opened. At this time, the lithium battery BMS (102) is still in the power-limited state.

6. The electric vehicle current and power limiting system capable of remote control according to claim 5, characterized in that: The power-limiting mode deactivation includes manually issuing a power-limiting exit instruction and automatically issuing a power-limiting exit instruction. The manual issuance of the power-limiting exit instruction includes the following steps: Step 1: The manager finds the number of the electric vehicle (101) that needs to be released from power restriction; Step 2. The administrator clicks to exit the power-limiting mode; Step 3: The management server sends an exit power restriction instruction to the electric vehicle network locator (103); Step 4: the electric vehicle network locator (103) receives the exit power restriction instruction and forwards it to the lithium battery BMS (102); Step 5: After receiving the exit power restriction instruction, the lithium battery BMS (102) exits the power restriction mode and returns to the power restriction state; Step 6, the electric vehicle network locator (103) receives the returned result and remotely pushes it to the management server; Step 7: The management terminal displays whether the electric vehicle (101) is in a power-limited state.

7. The electric vehicle current and power limiting system capable of remote control according to claim 6, characterized in that: The power limiting current size in step 1 of setting the power limiting parameters is divided into the following levels: no riding, low-speed riding allowed, and medium-speed riding allowed, so as to provide a more flexible current and power limiting management mode. The power limiting current size is set according to the current parameters of the actual electric vehicle (101).

8. The electric vehicle current and power limiting system capable of remote control according to claim 7, characterized in that: In step 2 of the lithium battery BMS (102) entering the power-limiting mode, the lithium battery BMS (102) entering the power-limiting mode does not affect the lithium battery powering the electric vehicle networking locator (103), and the electric vehicle networking locator (103) can receive instructions sent by the server and send instructions to the lithium battery BMS (102).

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