Vehicle safe charging method and device

Abstract

The invention discloses a vehicle safe charging method and device, and relates to the technical field of vehicle charging, and the vehicle safe charging method comprises the steps that when a vehicle needs to be charged, whether a target resistance value output by a charging pile when a discharging gun is connected to the vehicle exists or not is detected; if yes, a CCOUT hard wire signal is output to a vehicle-mounted charger, and the target resistance value is reported to a battery management system through a CAN, so that the battery management system controls the vehicle to be forbidden to be started for safe charging through a PDCU according to the target resistance value. According to the method, the time of reporting the target resistance value output by the charging pile by the CAN is advanced, that is, the resistance value is reported as long as the gun is inserted, the vehicle is locked and forbidden to be started, the situation that the gun moves in the vehicle is avoided, and compared with the prior art, the method only needs to insert the gun and does not need to swipe a card, so that the cost is reduced. Therefore, the vehicle can be prohibited from starting before being charged.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle charging, and in particular to a vehicle safe charging method and device. Background Art

[0002] When a traditional car interacts with a charging pile for charging, two steps are required: plugging the gun and swiping the card. When only the gun is plugged in without swiping the card, the European standard charging pile may not send CP (PWM voltage signal), that is, it is impossible to determine whether it is fast charging or slow charging by combining the CP duty cycle method. That is, if the fast charging gun is plugged in at this time, and the charging pile needs to swipe the card and start the charging process before outputting the CP duty cycle, then when the card is not swiped, it is impossible to determine whether it is fast charging or slow charging, and no gun plug-in signal will be output. However, the gun has actually been plugged in at this time, and the vehicle can still move, which is prone to the risk of "moving the gun while the car is in motion".

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a vehicle safe charging method and device, aiming to solve the technical problem that when the car is not swiped, it is impossible to determine whether it is fast charging or slow charging, and no gun insertion signal will be output, but the gun is actually plugged in and the vehicle can still move, which easily leads to the risk of "the gun is in the car and moving".

[0005] To achieve the above object, the present invention provides a vehicle safe charging method, the vehicle safe charging method comprising:

[0006] When the vehicle needs to be charged, detect whether there is a target resistance value output by the charging pile when the discharge gun is connected to the vehicle;

[0007] If so, a CCOUT hard-wire signal is output to the vehicle charger, and the target resistance value is reported to the battery management system via CAN, so that the battery management system controls the vehicle to prohibit starting and charge safely through the PDCU according to the target resistance value.

[0008] In one embodiment, if yes, then outputting a CCOUT hard-wire signal to the vehicle charger, and reporting the target resistance value to the battery management system via CAN, so that the battery management system controls the vehicle to prohibit starting and perform safe charging through the PDCU according to the target resistance value, after that, the step includes:

[0009] Obtaining a duty cycle of a PWM voltage signal output by the charging pile;

[0010] The target charging signal is determined according to the target resistance value and the duty cycle of the PWM voltage signal, so that the battery management system controls the vehicle to charge according to the target charging signal.

[0011] In one embodiment, the target charging signal includes a slow charging signal, and the step of determining the target charging signal according to the target resistance value and the duty cycle of the PWM voltage signal so that the battery management system controls the vehicle to charge according to the target charging signal includes:

[0012] When the target resistance value reaches a first preset resistance value condition and the duty cycle of the PWM voltage signal reaches a first preset duty cycle condition, the slow charging signal is obtained;

[0013] According to the slow charging signal, the CCOUT hard-wire signal is continuously transmitted to the vehicle charger, and the slow charging signal is sent to the battery management system through the CAN, so that the battery management system controls the vehicle to charge according to the slow charging signal.

[0014] In one embodiment, the target charging signal includes a fast charging signal, and the step of determining the target charging signal according to the target resistance value and the duty cycle of the PWM voltage signal so that the battery management system controls the vehicle to charge according to the target charging signal further includes:

[0015] When the target resistance value reaches a second preset resistance value condition and the duty cycle of the PWM voltage signal reaches a second preset duty cycle condition, the fast charging signal is obtained;

[0016] According to the fast charging signal, stop transmitting the CCOUT hard wire signal to the vehicle charger, transmit the CC2 hard wire signal and the A+ hard wire signal to the battery management system, and send the fast charging signal to the battery management system through the CAN, so that the battery management system controls the vehicle to charge according to the fast charging signal.

[0017] In one embodiment, after determining the target charging signal according to the target resistance value and the duty cycle of the PWM voltage signal so that the battery management system controls the vehicle to charge according to the target charging signal, the method further includes:

[0018] detecting a stop charging signal transmitted by the battery management system;

[0019] maintaining transmission of a hardwire signal and the CAN according to the stop charging signal;

[0020] During the transmission of the hard-line signal and the CAN, detecting whether the target resistance value is received;

[0021] If not, the transmission of the hard-wire signal is stopped according to the stop charging signal and a start signal is sent to the battery management system through the CAN, so that the battery management system controls the vehicle to be started through the PDCU according to the start signal.

[0022] In one embodiment, the target charging signal includes a slow charging stop signal, and the step of maintaining the transmission of the hard line signal and the CAN according to the stop charging signal includes:

[0023] When receiving the slow charge stop signal transmitted by the battery management system, the CCOUT hard wire signal is continuously transmitted to the vehicle charger according to the slow charge stop signal, and the slow charge signal is kept sent to the battery management system through the CAN.

[0024] In one embodiment, the target charging signal includes a fast charging stop signal, and the step of maintaining the transmission of the hard line signal and the CAN according to the stop charging signal further includes:

[0025] When the fast charge stop signal transmitted by the battery management system is received, the transmission of the A+ hard wire signal to the battery management system is stopped according to the fast charge stop signal, and the fast charge signal is kept sent to the battery management system through the CAN.

[0026] In one embodiment, the target charging signal includes the slow charging stop signal, and if not, the step of stopping the transmission of the hard-wire signal according to the stop charging signal and sending a start signal to the battery management system through the CAN includes:

[0027] When the target resistance value is not received, transmission of the CCOUT hard-wire signal to the on-board charger and transmission of the start signal to the battery management system through the CAN are stopped according to the slow charge stop signal.

[0028] In one embodiment, the target charging signal includes the fast charging stop signal, and if not, the step of stopping the transmission of the hard-wire signal according to the stop charging signal and sending a start signal to the battery management system through the CAN further includes:

[0029] When the target resistance value is not received, transmission of the CC2 hard-line signal to the battery management system and transmission of the start signal to the battery management system via the CAN are stopped according to the fast charge stop signal.

[0030] In addition, to achieve the above-mentioned objectives, the present invention also proposes a vehicle safety charging device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the vehicle safety charging method described above.

[0031] One or more technical solutions proposed in the present invention have at least the following technical effects:

[0032] The present invention detects whether there is a target resistance value output by the charging pile when the discharge gun is connected to the vehicle when the vehicle needs to be charged; if so, it outputs a CCOUT hard-line signal to the on-board charger, and reports the target resistance value to the battery management system through CAN, so that the battery management system controls the vehicle to prohibit starting through PDCU according to the target resistance value for safe charging. Since the present invention advances the time for reporting the target resistance value output by the charging pile to CAN, that is, the resistance value is reported as long as the gun is plugged in, the vehicle is locked and prohibited from starting, thus avoiding the situation of "moving the gun in the car". Compared with the prior art, the present invention only needs to plug in the gun without the need to swipe the card, and the vehicle can be prohibited from starting before charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0035] Figure 1 This is a schematic flow chart of a first embodiment of a vehicle safety charging method of the present invention;

[0036] Figure 2 This is a flow chart of a second embodiment of a vehicle safety charging method according to the present invention;

[0037] Figure 3 A schematic diagram of a flow chart of a third embodiment of a vehicle safety charging method of the present invention;

[0038] Figure 4 This is a schematic flow chart of a fourth embodiment of a vehicle safety charging method of the present invention;

[0039] Figure 5 A schematic diagram of a simplified process of a vehicle safety charging method provided in Embodiment 2 of the present invention;

[0040] Figure 6 Schematic diagram of the device structure of the hardware operating environment involved in the motor overcurrent protection method in an embodiment of the present invention.

[0041] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0042] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present invention and are not used to limit the present invention.

[0043] In order to better understand the technical solution of the present invention, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0044] The main solution of the embodiment of the present invention is: when the vehicle needs to interact with the charging pile for charging, after detecting that the discharge gun is connected to the vehicle charging socket, the target resistance value output by the charging pile is obtained, and the time for reporting the target resistance value through CAN is advanced, and the vehicle is locked and prohibited from starting, thereby avoiding the situation of "the gun is moved in the car".

[0045] In this embodiment, for the convenience of description, the following description is made by taking the identification of the EVCC chip as the execution subject.

[0046] Due to the existing technology, when the car and the charging pile interact with each other for charging, two steps are required, namely, plugging the gun and swiping the card. When only the gun is plugged in without swiping the card, the European standard charging pile may not send CP, that is, it is impossible to judge whether it is fast charging or slow charging by combining the CP duty cycle method. That is, if the fast charging gun is plugged in at this time, and the charging pile needs to swipe the card and start the charging process before outputting the CP duty cycle, then when the card is not swiped, it is impossible to judge whether it is fast charging or slow charging, and no gun plug-in signal will be output. However, the gun has actually been plugged in at this time, and the vehicle can still move, which is prone to the risk of "moving the gun in the car".

[0047] The present invention provides a solution, which advances the time for CAN to report the target resistance value output by the charging pile, that is, the resistance value is reported as soon as the charging gun is plugged in, and the vehicle is locked and prohibited from starting, thereby avoiding the situation of "the gun is in the car and moved". Compared with the prior art, the present invention only needs to plug in the charging gun without the step of swiping the card, so that the vehicle can be prohibited from starting before charging.

[0048] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, etc. The following takes the above EVCC chip as an example to illustrate this embodiment and the following embodiments.

[0049] Based on this, an embodiment of the present invention provides a vehicle safe charging method, referring to Figure 1 , Figure 1 This is a schematic flow chart of the first embodiment of the vehicle safety charging method of the present invention.

[0050] In this embodiment, the vehicle safe charging method includes steps S10 to S20:

[0051] Step S10, when the vehicle needs to be charged, detecting whether there is a target resistance value output by the charging pile when the discharge gun is connected to the vehicle.

[0052] It should be noted that the above-mentioned charging pile can be a power supply device that provides electrical energy to the vehicle;

[0053] It should be noted that the above-mentioned discharge gun can be a device for transmitting electric energy when the above-mentioned charging pile charges the vehicle;

[0054] It should be noted that the target resistance value may be the resistance value of the discharge gun tip.

[0055] It is understandable that when different vehicles are charged, the above charging piles and the above discharge guns are different and can be selected according to actual conditions;

[0056] It is understandable that, in the present invention, when the above target resistance value is 100Ω, 220Ω and 680Ω, it is a slow charging resistance value, and when the above target resistance value is 1500Ω, it is a fast charging resistance value.

[0057] In a specific implementation, when the vehicle needs to be charged, it is necessary to first connect the discharge gun in the charging pile to the charging socket of the vehicle, and after the connection, detect whether the target resistance value output by the charging pile exists. In fact, detecting whether the target resistance value exists is to confirm that the discharge gun has been connected to the charging socket of the vehicle.

[0058] Step S20: If yes, output the CCOUT hard-wire signal to the vehicle charger, and report the target resistance value to the battery management system through CAN, so that the battery management system controls the vehicle to prohibit starting and charge safely through the PDCU according to the target resistance value.

[0059] It should be noted that the CCOUT hard-wire signal may be a signal directly transmitted through a physical wire;

[0060] It should be noted that the above-mentioned on-board charger can convert the AC power of the AC charging pile into the DC power required by the power battery, thereby realizing a device for charging the power battery;

[0061] It should be noted that the above-mentioned CAN may be a controller area network with a protocol that allows multiple devices to communicate within the same network;

[0062] It should be noted that the above-mentioned battery management system can be a component that monitors and manages the charging and discharging process of the battery pack, ensures battery safety, prolongs battery life and optimizes battery performance;

[0063] It should be noted that the above-mentioned PDCU may be a module having technology for managing power distribution and control.

[0064] It is understandable that the CCOUT hard line in the present invention is used by the EVCC chip to transmit the signal of the on-board charger;

[0065] It is understandable that the CAN in the present invention can report the information in the EVCC chip to the battery management system;

[0066] It is understandable that the battery management system described above is used in the present invention to monitor and manage the vehicle for slow charging and fast charging;

[0067] It is understandable that the above-mentioned PDCU is used in the present invention to control whether the vehicle is allowed to start.

[0068] In a specific implementation, when the EVCC chip detects the target value output by the charging pile, it immediately outputs the CCOUT hard-wire signal to the on-board charger and reports the target resistance value to the battery management system through the CAN. After receiving the target resistance value, the battery management system controls the vehicle to prohibit starting through the PDCU, thereby ensuring that the vehicle has a safe charging environment.

[0069] The present embodiment provides a method for safe charging of a vehicle, by detecting whether the target resistance value output by the charging pile when the discharge gun is connected to the vehicle is received, and then reporting the target resistance value to the battery management system through the CAN in advance, so that the battery management system controls the vehicle to be prohibited from starting through the PDCU to provide a safe charging environment for the vehicle. Therefore, compared with the prior art, the present invention does not require swiping a card after the gun is plugged in to transmit the target resistance value to the battery management system, and can report the target resistance value immediately after the gun is plugged in, thereby avoiding the situation of "the gun is moved in the vehicle".

[0070] Based on the first embodiment of the present invention, in the second embodiment of the present invention, the same or similar contents as those in the first embodiment can refer to the above introduction, and will not be described in detail later. Figure 2 , Figure 2 This is a flow chart of a second embodiment of a vehicle safety charging method according to the present invention.

[0071] In a feasible implementation manner, the step S20 may further include steps S201 to S202:

[0072] Step S201, obtaining the duty cycle of the PWM voltage signal output by the charging pile.

[0073] It should be noted that the duty cycle of the PWM voltage signal can be used as a voltage signal to assist the target resistance value in determining whether to use slow charging or fast charging.

[0074] It is understandable that when the duty cycle of the PWM voltage signal is between 3% and 7%, it is fast charging, and when the duty cycle of the PWM voltage signal is between 8% and 97%, it is slow charging.

[0075] In a specific implementation, after the EVCC chip receives the target resistance value, the charging pile will output the PWM voltage signal duty cycle to the EVCC chip through the discharge gun.

[0076] Step S202, determining the target charging signal according to the target resistance value and the duty cycle of the PWM voltage signal, so that the battery management system controls the vehicle to charge according to the target charging signal.

[0077] It should be noted that the above target charging signal can be a slow charging signal or a fast charging signal.

[0078] It is understandable that the battery management system will control the vehicle to charge in different ways according to different target charging signals.

[0079] In a specific implementation, after receiving the target resistance value and the duty cycle of the PWM voltage signal, the EVCC chip determines the target charging signal, so that the battery management system controls the vehicle to perform fast charging or slow charging according to the target charging signal.

[0080] Based on the second embodiment of the present invention, in the third embodiment of the present invention, the same or similar contents as those in the second embodiment can be referred to the above introduction, and will not be described in detail later. Figure 3 , Figure 3 This is a schematic flow chart of a third embodiment of a vehicle safety charging method according to the present invention.

[0081] In this embodiment, step S202 includes steps S2021 to S2022:

[0082] Step S2021, when the target resistance value reaches a first preset resistance value condition and the duty cycle of the PWM voltage signal reaches a first preset duty cycle condition, the slow charging signal is obtained.

[0083] It should be noted that the first preset resistance condition may be 100Ω or 220Ω, or 680Ω;

[0084] It should be noted that the first preset duty cycle condition may be any duty cycle of the PWM voltage signal within a range of 8% to 97%;

[0085] It should be noted that the above-mentioned slow charging signal can be a signal for the above-mentioned charging pile and the vehicle to perform a charging handshake.

[0086] It is understandable that, in the present invention, the first preset resistance condition is a resistance condition that satisfies the vehicle in slow charging;

[0087] It is understandable that, in the present invention, the first preset duty cycle condition is a duty cycle condition that satisfies the vehicle in slow charging;

[0088] It is understandable that, in the present invention, the above-mentioned slow charging signal can only be obtained when the two conditions that the above-mentioned target resistance value reaches the above-mentioned first preset resistance value and the above-mentioned PWM voltage signal duty cycle reaches the above-mentioned first preset duty cycle are simultaneously met.

[0089] In a specific implementation, when the target resistance value obtained by the EVCC chip is any one of 100Ω, 220Ω or 680Ω and the duty cycle of the PWM voltage signal obtained is within 8% to 97%, these two conditions are met at the same time, it is considered that the vehicle enters the slow charging mode, and the slow charging signal is obtained at this time.

[0090] Step S2022: According to the slow charging signal, continuously transmit the CCOUT hard-wire signal to the vehicle charger, and send the slow charging signal to the battery management system through the CAN, so that the battery management system controls the vehicle to charge according to the slow charging signal.

[0091] In a specific implementation, according to the above-mentioned slow charging signal, the work of transmitting the above-mentioned CCOUT hard-wire signal to the above-mentioned vehicle charger when the above-mentioned target resistance value is detected is maintained, and at the same time, the above-mentioned slow charging signal is sent to the above-mentioned battery management system through the above-mentioned CAN, so that the above-mentioned battery management system controls the vehicle to charge according to the above-mentioned slow charging signal.

[0092] Based on the third embodiment of the present invention, in the fourth embodiment of the present invention, the same or similar contents as those in the third embodiment can refer to the above introduction, and will not be repeated in the following. Figure 4 , Figure 4 This is a flow chart of a fourth embodiment of a vehicle safety charging method according to the present invention.

[0093] In this embodiment, the step S202 further includes steps S2023 to S2024:

[0094] Step S2023, when the target resistance value reaches a second preset resistance value condition and the duty cycle of the PWM voltage signal reaches a second preset duty cycle condition, the fast charging signal is obtained.

[0095] It should be noted that the second preset resistance condition may be 1500Ω;

[0096] It should be noted that the second preset duty cycle condition may be any duty cycle of the PWM voltage signal within a range of 3% to 7%.

[0097] It should be noted that the above-mentioned fast charging signal can be a signal for the above-mentioned charging pile and the vehicle to perform a charging handshake.

[0098] It is understandable that, in the present invention, the second preset resistance condition is a resistance condition that satisfies the vehicle in fast charging;

[0099] It is understandable that, in the present invention, the second preset duty cycle condition is a duty cycle condition that satisfies the vehicle in fast charging;

[0100] It is understandable that in the present invention, the above-mentioned fast charging signal can only be obtained when the two conditions that the above-mentioned target resistance value reaches the above-mentioned second preset resistance value and the above-mentioned PWM voltage signal duty cycle reaches the above-mentioned second preset duty cycle are met at the same time.

[0101] In a specific implementation, when the target resistance value obtained by the EVCC chip is 1500Ω and the duty cycle of the PWM voltage signal obtained is within 3% to 7%, the vehicle is considered to have entered the fast charging mode, and the fast charging signal is obtained.

[0102] Step S2024, according to the fast charging signal, stop transmitting the CCOUT hard wire signal to the vehicle charger, transmit the CC2 hard wire signal and the A+ hard wire signal to the battery management system, and send the fast charging signal to the battery management system through the CAN, so that the battery management system controls the vehicle to charge according to the fast charging signal.

[0103] It should be noted that the above CC2 hard-wire signal may be a signal directly transmitted through a physical wire;

[0104] It should be noted that the above-mentioned A+2 hard-wire signal may be a signal directly transmitted through a physical wire.

[0105] It is understandable that, in the present invention, the CC2 hard-wire signal is used to confirm the connection between the charging pile and the vehicle;

[0106] It is understandable that, in the present invention, the A+ hard-wire signal is used to wake up the battery management system or other control unit;

[0107] It can be understood that the above-mentioned CC2 hard-wire signal and the above-mentioned A+ hard-wire signal ensure stable communication and control during the charging process.

[0108] In a specific implementation, according to the fast charging signal, the transmission of the CCOUT hard wire signal to the vehicle charger is stopped, and the CC2 hard wire signal and the A+ hard wire signal are transmitted to the battery management system at the same time, and the fast charging signal is sent to the battery management system through the CAN, so that the battery management system controls the vehicle to charge according to the fast charging signal.

[0109] In a feasible implementation manner, step S202 may further include steps S203' to S206':

[0110] Step S203': detecting a charging stop signal transmitted by the battery management system.

[0111] It should be noted that the above-mentioned stop charging signal can be a slow charging stop signal or a fast charging stop signal.

[0112] It is understandable that, in the present invention, the above-mentioned stop charging signal is a signal transmitted from the above-mentioned battery management system to the above-mentioned EVCC chip when the vehicle needs to stop charging after charging is completed.

[0113] In a specific implementation, when the vehicle is fully charged, the vehicle needs to stop charging. At this time, the battery management system will transmit the stop charging signal to the EVCC chip.

[0114] For example, in order to help understand the implementation process of the vehicle safety charging method obtained by combining this embodiment with the above-mentioned embodiment 2, please refer to Figure 5 , Figure 5 A brief flow chart of a vehicle safety charging method provided in the second embodiment of the present invention, specifically:

[0115] Step S204 ′: maintaining transmission of the hard-line signal and the CAN according to the stop charging signal.

[0116] It should be noted that the above hard-wired signal may be a CCOUT hard-wired signal, a CC2 hard-wired signal or an A+ hard-wired signal;

[0117] It should be noted that the above-mentioned CAN transmission can be the transmission of the above-mentioned slow charging signal, or the transmission of the above-mentioned fast charging signal.

[0118] It is understandable that, depending on the different stop charging signals, the hard line signal and the CAN transmission that need to be maintained are different.

[0119] In a specific implementation, the EVCC chip will maintain the transmission of different hard-line signals and the CAN according to the specific stop charging signal, that is, to ensure that after the charging is completed and the discharge gun has not left the vehicle, the vehicle remains in an unstartable state.

[0120] Step S205 ′: during the transmission of the hard-line signal and the CAN, detecting whether the target resistance value is received.

[0121] In a specific implementation, during the transmission of the hard-wire signal and the CAN, it is detected whether the target resistance value is received, that is, it is detected whether the discharge gun is taken out of the charging socket of the vehicle after charging is completed, and whether the vehicle is completely separated from the charging pile.

[0122] Step S206', if not, then stop the transmission of the hardwire signal and the CAN according to the stop charging signal, and send a start signal to the battery management system, so that the battery management system controls the vehicle to start through the PDCU according to the start signal.

[0123] It should be noted that the above-mentioned start signal may be a signal indicating that the vehicle charging is completed.

[0124] In a specific implementation, when the EVCC chip does not detect the target resistance value, it means that the vehicle has been completely separated from the charging pile. At this time, the transmission of the hard-wire signal is stopped according to the stop charging signal, and the start signal is sent to the battery management system through the CAN, so that the battery management system controls the vehicle to start through the PDCU according to the start signal.

[0125] In this embodiment, the step S204' includes step S2041':

[0126] Step S2041', when receiving the slow charge stop signal transmitted by the battery management system, continuously transmitting the CCOUT hard wire signal to the vehicle charger according to the slow charge stop signal, and keeping sending the slow charge signal to the battery management system through the CAN.

[0127] It should be noted that the above-mentioned slow charging stop signal may be a signal indicating that the vehicle has completed charging in the slow charging mode.

[0128] In a specific implementation, when the above-mentioned slow charging stop signal transmitted by the above-mentioned battery management system is received, it means that the vehicle has been fully charged in the slow charging mode at this time, but the vehicle has not been separated from the above-mentioned charging pile at this time. Therefore, it is necessary to continue to transmit the above-mentioned CCOUT hard-wire signal to the above-mentioned vehicle charger according to the above-mentioned slow charging stop signal, and keep sending the above-mentioned slow charging signal to the above-mentioned battery management system through the above-mentioned CAN. The purpose is to prevent the vehicle from being started when the above-mentioned discharge gun has not left the vehicle.

[0129] In this embodiment, the step S204' further includes step S2042':

[0130] Step S2042', when receiving the fast charge stop signal transmitted by the battery management system, stop transmitting the A+ hard wire signal to the battery management system according to the fast charge stop signal, and keep sending the fast charge signal to the battery management system through the CAN.

[0131] It should be noted that the above-mentioned fast charging stop signal can be a signal indicating that the vehicle has completed charging in fast charging mode.

[0132] In a specific implementation, when the fast charging stop signal transmitted by the battery management system is received, it means that the vehicle has been fully charged in the fast charging mode, but the vehicle has not been separated from the charging pile. Therefore, it is necessary to stop transmitting the A+ hard wire signal to the battery management system according to the fast charging stop signal, and keep sending the fast charging signal to the battery management system through the CAN. The purpose is to prevent the vehicle from starting when the discharge gun has not left the vehicle.

[0133] In this embodiment, the step S206' includes step S2061':

[0134] Step S2061 ′: when the target resistance value is not received, stop transmitting the CCOUT hard-wire signal to the vehicle charger and stop transmitting the start signal to the battery management system through the CAN according to the slow charge stop signal.

[0135] In a specific implementation, when the target resistance value is not received, it indicates that the vehicle has been separated from the charging pile, and the vehicle enters the waiting-for-start mode. At this time, according to the slow charging stop signal, the transmission of the CCOUT hard-wire signal to the on-board charger and the transmission of the start signal to the battery management system through the CAN are stopped.

[0136] In this embodiment, the step S206' further includes step S2062':

[0137] Step S2062', when the target resistance value is not received, stop transmitting the CC2 hard-line signal to the battery management system and transmitting the start signal to the battery management system via the CAN according to the fast charge stop signal.

[0138] In a specific implementation, when the above-mentioned target resistance value is not received, it indicates that the vehicle has been separated from the above-mentioned charging pile, and the vehicle enters the standby mode. At this time, according to the above-mentioned fast charging stop signal, the transmission of the CC2 hard wire signal to the above-mentioned battery management system and the transmission of the above-mentioned start signal to the above-mentioned battery management system through the above-mentioned CAN are stopped.

[0139] The present invention provides a vehicle safety charging device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the vehicle safety charging method in the above-mentioned embodiment one.

[0140] Reference below Figure 6 , which shows a schematic diagram of the structure of a vehicle safety charging device suitable for implementing an embodiment of the present invention. The vehicle safety charging device in the embodiment of the present invention may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5 The illustrated vehicle safety charging device is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0141] like Figure 5As shown, the vehicle safety charging device may include a processing device 1001 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the vehicle safety charging device are also stored. The processing device 1001, ROM1002 and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the vehicle safety charging device to communicate with other devices wirelessly or wired to exchange data. Although the figure shows a vehicle safety charging device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or provided alternatively.

[0142] In particular, according to the embodiments disclosed in the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present invention include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present invention are executed.

[0143] The vehicle safety charging device provided by the present invention adopts the vehicle safety charging method in the above embodiment to solve the technical problem of vehicle safety charging. Compared with the prior art, the beneficial effects of the vehicle safety charging device provided by the present invention are the same as the beneficial effects of the vehicle safety charging method provided by the above embodiment, and the other technical features in the vehicle safety charging device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0144] It should be understood that the various parts disclosed in the present invention can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0145] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

[0146] The above descriptions are only some embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A vehicle safe charging method, characterized in that: The vehicle safe charging method comprises: When the vehicle needs to be charged, detect whether there is a target resistance value output by the charging pile when the discharge gun is connected to the vehicle; If so, a CCOUT hard-wire signal is output to the vehicle charger, and the target resistance value is reported to the battery management system via CAN, so that the battery management system controls the vehicle to prohibit starting and charge safely through the PDCU according to the target resistance value.

2. The vehicle safety charging method according to claim 1, characterized in that: If yes, then output the CCOUT hard-wire signal to the vehicle charger, and report the target resistance value to the battery management system through CAN, so that the battery management system controls the vehicle to prohibit starting and perform safe charging through PDCU according to the target resistance value, and then includes: Obtaining a duty cycle of a PWM voltage signal output by the charging pile; The target charging signal is determined according to the target resistance value and the duty cycle of the PWM voltage signal, so that the battery management system controls the vehicle to charge according to the target charging signal.

3. The vehicle safety charging method according to claim 2, characterized in that: The target charging signal includes a slow charging signal, and the step of determining the target charging signal according to the target resistance value and the duty cycle of the PWM voltage signal so that the battery management system controls the vehicle to charge according to the target charging signal includes: When the target resistance value reaches a first preset resistance value condition and the duty cycle of the PWM voltage signal reaches a first preset duty cycle condition, the slow charging signal is obtained; According to the slow charging signal, the CCOUT hard-wire signal is continuously transmitted to the vehicle charger, and the slow charging signal is sent to the battery management system through the CAN, so that the battery management system controls the vehicle to charge according to the slow charging signal.

4. The vehicle safety charging method according to claim 2, characterized in that: The target charging signal includes a fast charging signal, and the step of determining the target charging signal according to the target resistance value and the duty cycle of the PWM voltage signal so that the battery management system controls the vehicle to charge according to the target charging signal also includes: When the target resistance value reaches a second preset resistance value condition and the duty cycle of the PWM voltage signal reaches a second preset duty cycle condition, the fast charging signal is obtained; According to the fast charging signal, stop transmitting the CCOUT hard wire signal to the vehicle charger, transmit the CC2 hard wire signal and the A+ hard wire signal to the battery management system, and send the fast charging signal to the battery management system through the CAN, so that the battery management system controls the vehicle to charge according to the fast charging signal.

5. The vehicle safety charging method according to claim 2, characterized in that: After determining the target charging signal according to the target resistance value and the duty cycle of the PWM voltage signal so that the battery management system controls the vehicle to charge according to the target charging signal, the method further includes: detecting a stop charging signal transmitted by the battery management system; maintaining transmission of a hardwire signal and the CAN according to the stop charging signal; During the transmission of the hard-line signal and the CAN, detecting whether the target resistance value is received; If not, the transmission of the hard-wire signal is stopped according to the stop charging signal and a start signal is sent to the battery management system through the CAN, so that the battery management system controls the vehicle to be started through the PDCU according to the start signal.

6. The vehicle safety charging method according to claim 5, characterized in that: The target charging signal includes a slow charging stop signal, and the step of maintaining the transmission of the hard line signal and the CAN according to the stop charging signal includes: When receiving the slow charge stop signal transmitted by the battery management system, the CCOUT hard wire signal is continuously transmitted to the vehicle charger according to the slow charge stop signal, and the slow charge signal is kept sent to the battery management system through the CAN.

7. The vehicle safety charging method according to claim 5, characterized in that: The target charging signal includes a fast charging stop signal, and the step of maintaining the transmission of the hard line signal and the CAN according to the stop charging signal further includes: When the fast charge stop signal transmitted by the battery management system is received, the transmission of the A+ hard wire signal to the battery management system is stopped according to the fast charge stop signal, and the fast charge signal is kept sent to the battery management system through the CAN.

8. The vehicle safety charging method according to claim 5, characterized in that: The target charging signal includes the slow charging stop signal, and if not, the steps of stopping the transmission of the hard-wire signal according to the stop charging signal and sending a start signal to the battery management system through the CAN include: When the target resistance value is not received, transmission of the CCOUT hard-wire signal to the on-board charger and transmission of the start signal to the battery management system through the CAN are stopped according to the slow charge stop signal.

9. The vehicle safety charging method according to claim 5, characterized in that: The target charging signal includes the fast charging stop signal, and if not, the step of stopping the transmission of the hard-wire signal according to the stop charging signal and sending a start signal to the battery management system through the CAN further includes: When the target resistance value is not received, transmission of the CC2 hard-line signal to the battery management system and transmission of the start signal to the battery management system via the CAN are stopped according to the fast charge stop signal.

10. A vehicle safe charging method and equipment, characterized in that: The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the vehicle safety charging method according to any one of claims 1 to 9.

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