A method and device for safe charging of vehicles

Abstract

This invention discloses a safe charging method and device for vehicles, relating to the field of vehicle charging technology. The method includes: when a vehicle needs to be charged, detecting whether a target resistance value is output by the charging pile when a discharge gun is connected to the vehicle; if so, outputting a CCOUT hardwire signal to the on-board charger and reporting the target resistance value to the battery management system via CAN, so that the battery management system, based on the target resistance value, controls the vehicle to prevent starting for safe charging via the PDCU. This invention advances the timing of CAN reporting the target resistance value output by the charging pile—reporting the resistance value as soon as the discharge gun is connected—locking the vehicle and preventing it from starting, thus avoiding the situation of "the gun being moved while the vehicle is in motion." Compared with existing technologies, this invention only requires plugging in the discharge gun and does not require a card swiping step, thus preventing the vehicle from starting before charging.

Description

Technical Field

[0001] This invention relates to the field of vehicle charging technology, and in particular to a method and device for safe vehicle charging. Background Technology

[0002] Traditionally, when a car interacts with a charging station, two steps are required: plugging in the charging gun and swiping the card. When only the charging gun is plugged in without swiping the card, the European standard charging station may not send a CP (PWM voltage signal). This means that it is impossible to determine whether the charging gun is plugged in for fast or slow charging by combining the CP duty cycle. In other words, if the fast charging gun is plugged in at this time, and the charging station requires swiping the card before starting the charging process to output the CP duty cycle, then it is impossible to determine whether it is fast or slow charging when the card is not swiped, and no charging gun plugging signal will be output. However, at this time, the charging gun is actually plugged in, and the vehicle can still move, which can easily lead to the risk of "the gun is in the car but the car is not."

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main objective of this invention is to provide a safe charging method and device for vehicles, aiming to solve the technical problem that when a car is not swiped for charging, it is impossible to determine whether it is fast charging or slow charging, and it will not output a charging gun signal, even though the charging gun is actually plugged in and the vehicle can still move, which easily leads to the risk of "the charging gun being plugged in while the car is moved".

[0005] To achieve the above objectives, the present invention proposes a safe charging method for vehicles, the safe charging method comprising:

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

[0007] If so, the CCOUT hardwired 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 can control the vehicle to prevent it from starting and perform safe charging based on the target resistance value through the PDCU.

[0008] In one embodiment, if so, then after the step of outputting a CCOUT hardwired signal to the on-board charger and reporting the target resistance value to the battery management system via CAN, so that the battery management system controls the vehicle to prevent starting for safe charging based on the target resistance value via the PDCU, the method includes:

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

[0010] The target charging signal is determined based on 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. The step of determining the target charging signal based on 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 the first preset resistance value condition and the duty cycle of the PWM voltage signal reaches the first preset duty cycle condition, the slow charging signal is obtained;

[0013] Based on the slow charging signal, the CCOUT hardwire signal is continuously transmitted to the vehicle charger, and the slow charging signal is sent to the battery management system via the CAN bus, 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. The step of determining the target charging signal based on 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 the second preset resistance value condition and the PWM voltage signal duty cycle reaches the second preset duty cycle condition, the fast charging signal is obtained;

[0016] Based on the fast charging signal, the transmission of the CCOUT hardwire signal to the vehicle charger is stopped, and the CC2 hardwire signal and the A+ hardwire signal are transmitted to the battery management system. The fast charging signal is then sent to the battery management system via the CAN bus, 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 based on 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] Detect the stop charging signal transmitted by the battery management system;

[0019] The hard-wire signal and the CAN transmission are maintained according to the stopped charging signal;

[0020] During the transmission of the hard-wired signal and the CAN signal, it is detected whether the target resistance value is received.

[0021] If not, the transmission of the hard-wired signal is stopped according to the stop charging signal, and a start signal is sent to the battery management system via the CAN bus, so that the battery management system controls the vehicle to start via 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 hard-wired signal and the CAN transmission according to the stop charging signal includes:

[0023] When the slow charging stop signal is received from the battery management system, the CCOUT hardwire signal is continuously transmitted to the vehicle charger according to the slow charging stop signal, and the slow charging signal is continuously sent to the battery management system via the CAN bus.

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

[0025] When the fast charging stop signal is received from the battery management system, the transmission of the A+ hard wire signal to the battery management system is stopped according to the fast charging stop signal, while the fast charging signal is still sent to the battery management system via the CAN bus.

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

[0027] When the target resistance value is not received, the transmission of the CCOUT hardwire signal to the vehicle charger and the transmission of the start signal to the battery management system via the CAN bus are stopped according to the slow charging stop signal.

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

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

[0030] Furthermore, to achieve the above objectives, the present invention also proposes a vehicle safe charging device, the device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the vehicle safe charging method as described above.

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

[0032] This invention detects the target resistance value output by the charging pile when a vehicle needs charging; if so, it outputs a CCOUT hardwire signal to the on-board charger and reports the target resistance value to the battery management system via CAN. The battery management system then uses the PDCU to control the vehicle to prevent it from starting and safely charge based on the target resistance value. Because this invention advances the CAN reporting of the target resistance value output by the charging pile—reporting the resistance value as soon as the charging gun is plugged in—it locks the vehicle and prevents it from starting, avoiding the situation where the charging gun is moved while the vehicle is in use. Compared to existing technologies, this invention only requires plugging in the charging gun and does not require swiping a card, thus preventing the vehicle from starting before charging. Attached Figure Description

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

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a flowchart illustrating the first embodiment of the vehicle safe charging method of the present invention;

[0036] Figure 2 This is a flowchart illustrating the second embodiment of the vehicle safe charging method of the present invention;

[0037] Figure 3 This is a flowchart illustrating the third embodiment of the vehicle safe charging method of the present invention;

[0038] Figure 4 This is a flowchart illustrating the fourth embodiment of the vehicle safe charging method of the present invention;

[0039] Figure 5 This is a simplified flowchart illustrating the vehicle safe charging method provided in Embodiment 2 of the present invention;

[0040] Figure 6 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the motor overcurrent protection method in this embodiment of the invention.

[0041] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

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

[0043] To better understand the technical solution of the present invention, a detailed description will be provided below in conjunction with the accompanying drawings and specific embodiments.

[0044] The main solution of this 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's charging socket, the target resistance value output by the charging pile is obtained, and the time for reporting the target resistance value via CAN is advanced, thereby locking the vehicle and preventing it from starting, thus avoiding the situation where the "gun is in the car but the car is moved".

[0045] In this embodiment, for ease of description, the following description will focus on identifying the EVCC chip.

[0046] Because current technology requires two steps for a car to interact with a charging station during charging: plugging in the charging gun and swiping the card, if only the charging gun is plugged in without swiping the card, the European standard charging station may not send a CP (Charging Point) signal. This means that it is impossible to determine whether the charging gun is plugged in for fast or slow charging by combining the CP duty cycle. In other words, if the fast charging gun is plugged in at this time, and the charging station requires swiping the card before starting the charging process to output the CP duty cycle, then it is impossible to determine whether it is fast or slow charging when the card is not swiped, and no charging gun plugging signal will be output. However, at this time, the charging gun is actually plugged in, and the vehicle can still move, which can easily lead to the risk of "the gun is in the car but the car is not moving".

[0047] This invention provides a solution that locks the vehicle and prevents it from starting by advancing the time when the CAN bus reports 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. This avoids the situation where the charging gun is plugged in but the vehicle is moved. Compared with the prior art, this invention only requires plugging in the charging gun and does not require swiping a card, so that the vehicle can be prevented from starting before charging.

[0048] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device capable of performing the above functions. The following description uses the aforementioned EVCC chip as an example to illustrate this embodiment and the subsequent embodiments.

[0049] Based on this, embodiments of the present invention provide a method for safe charging of vehicles, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the vehicle safe 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, detect 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 aforementioned charging piles can be power supply devices that provide electrical energy to vehicles.

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

[0054] It should be noted that the target resistance value mentioned above can be the resistance value of the discharge gun head.

[0055] It is understandable that the charging piles and discharge guns mentioned above may differ depending on the vehicle being charged, and the appropriate option can be selected based on the actual situation.

[0056] It is understood that in this invention, the target resistance values ​​of 100Ω, 220Ω and 680Ω are slow charging resistance values, and the target resistance value of 1500Ω is a fast charging resistance value.

[0057] In practice, when a vehicle needs to be charged, the discharge gun in the charging pile must first be connected to the vehicle's charging socket. After connection, it is necessary to check whether the target resistance value output by the charging pile exists. In fact, checking whether the target resistance value exists is to confirm that the discharge gun and the vehicle's charging socket have been successfully connected.

[0058] Step S20: If yes, output the CCOUT hardwire signal to the vehicle charger and report the target resistance value to the battery management system via CAN, so that the battery management system can control the vehicle to prevent starting and perform safe charging based on the target resistance value via the PDCU.

[0059] It should be noted that the CCOUT hardwired signal mentioned above can be a signal transmitted directly through a physical wire;

[0060] It should be noted that the above-mentioned vehicle charger can convert the AC power from the AC charging pile into the DC power required by the power battery, thereby enabling the charging of the power battery.

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

[0062] It should be noted that the aforementioned battery management system is a component that monitors and manages the charging and discharging process of the battery pack, ensuring battery safety, extending battery life, and optimizing battery performance.

[0063] It should be noted that the aforementioned PDCU can be a module with power distribution and control technology.

[0064] It is understood that the CCOUT hardwire mentioned above is used in this invention to transmit the signal of the vehicle charger to the EVCC chip.

[0065] It is understood that the CAN bus described above can report information from the EVCC chip to the battery management system described above in this invention.

[0066] Understandably, the aforementioned battery management system is used in this invention to monitor and manage the vehicle during slow and fast charging.

[0067] Understandably, the aforementioned PDCU is used in this 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-wired signal to the on-board charger and reports the target resistance value to the battery management system via the CAN bus. After receiving the target resistance value, the battery management system controls the vehicle to be prevented from starting via the PDCU to ensure that the vehicle has a safe charging environment.

[0069] This embodiment provides a safe charging method for vehicles. By detecting whether the target resistance value output by the charging pile is received when the discharge gun is connected to the vehicle, the target resistance value is reported to the battery management system via the CAN bus in advance. This allows the battery management system to control the vehicle to be prevented from starting via the PDCU, thus providing a safe charging environment for the vehicle. Therefore, compared with the prior art, this invention does not require swiping a card after the gun is plugged in to transmit the target resistance value to the battery management system. It can report the target resistance value immediately after the gun is plugged in, avoiding the situation where the gun is moved while the vehicle is in use.

[0070] Based on the first embodiment of the present invention, in the second embodiment of the present invention, the same or similar content as in the first embodiment can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 2 , Figure 2 This is a flowchart illustrating the second embodiment of the vehicle safe charging method of the present invention.

[0071] In one feasible implementation, step S20 may be followed by steps S201 to S202:

[0072] Step S201: Obtain 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 mentioned above can be used as an auxiliary to the target resistance value to determine the voltage signal for slow charging and fast charging.

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

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

[0076] Step S202: Determine the target charging signal based on 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 target charging signal mentioned above can be either a slow charging signal or a fast charging signal.

[0078] Understandably, the aforementioned battery management system will control the vehicle to charge in different ways based on 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 content as in the second embodiment can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 3 , Figure 3 This is a flowchart illustrating the third embodiment of the vehicle safe charging method of the present invention.

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

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

[0083] It should be noted that the first preset resistance value can be 100Ω, 220Ω, or 680Ω.

[0084] It should be noted that the first preset duty cycle condition mentioned above can be any duty cycle of the PWM voltage signal within the range of 8% to 97%.

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

[0086] It is understood that, in this invention, the first preset resistance condition is a resistance condition that satisfies the vehicle being in slow charging mode.

[0087] It is understood that, in this invention, the first preset duty cycle condition is the duty cycle condition that satisfies the vehicle being in slow charging mode.

[0088] It is understood that, in this invention, the aforementioned slow charging signal can only be acquired when both the target resistance value reaches the first preset resistance value and the duty cycle of the PWM voltage signal reaches the first preset duty cycle.

[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 obtained PWM voltage signal is within 8% to 97%, the vehicle is considered to have entered slow charging mode, and the slow charging signal is obtained at this time.

[0090] Step S2022: Based on the slow charging signal, continuously transmit the CCOUT hardwire signal to the vehicle charger, and send the slow charging signal to the battery management system via the CAN bus, so that the battery management system controls the vehicle to charge according to the slow charging signal.

[0091] In a specific implementation, based on the aforementioned slow charging signal, the previous operation of transmitting the CCOUT hard-wire signal to the vehicle charger when the target resistance value was detected is maintained. At the same time, the slow charging signal is sent to the battery management system via the CAN bus, so that the battery management system controls the vehicle to charge according to the slow charging signal.

[0092] Based on the third embodiment of the present invention, in the fourth embodiment of the present invention, the contents that are the same as or similar to those in the third embodiment can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 4 , Figure 4 This is a flowchart illustrating the fourth embodiment of the vehicle safe charging method of the present invention.

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

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

[0095] It should be noted that the second preset resistance value condition mentioned above can be 1500Ω;

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

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

[0098] It is understood that, in this invention, the aforementioned second preset resistance condition is a resistance condition that satisfies the vehicle being in fast charging mode.

[0099] It is understood that, in this invention, the aforementioned second preset duty cycle condition is a duty cycle condition that satisfies the vehicle being in fast charging mode.

[0100] It is understood that, in this invention, the fast charging signal can only be acquired when both the target resistance value reaches the second preset resistance value and the duty cycle of the PWM voltage signal reaches the second preset duty cycle.

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

[0102] Step S2024: Based on the fast charging signal, stop transmitting the CCOUT hardwire signal to the vehicle charger, transmit the CC2 hardwire signal and the A+ hardwire signal to the battery management system, and send the fast charging signal to the battery management system via the CAN bus, so that the battery management system controls the vehicle to charge according to the fast charging signal.

[0103] It should be noted that the CC2 hardwired signal mentioned above can be a signal transmitted directly through a physical wire;

[0104] It should be noted that the aforementioned A+2 hard-wired signal can be a signal transmitted directly through a physical conductor.

[0105] It is understood that, in this invention, the aforementioned CC2 hard-wired signal is used to confirm the connection between the charging pile and the vehicle.

[0106] It is understood that, in this invention, the aforementioned A+ hard-wired signal is used to wake up the aforementioned battery management system or other control unit;

[0107] Understandably, the aforementioned CC2 hard-wired signal and A+ hard-wired signal ensure stable communication and control during the charging process.

[0108] In a specific implementation, based on the fast charging signal, the transmission of the CCOUT hard wire signal to the on-board charger is stopped, while the CC2 hard wire signal and the A+ hard wire signal are transmitted to the battery management system. The fast charging signal is then sent to the battery management system via the CAN bus, so that the battery management system controls the vehicle to charge according to the fast charging signal.

[0109] In one possible implementation, steps S202 may be followed by steps S203' to S206':

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

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

[0112] It is understood that, in this invention, the aforementioned stop charging signal is a signal transmitted from the battery management system to the EVCC chip when the vehicle needs to perform a stop charging operation after charging is completed.

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

[0114] For example, to help understand the implementation process of the vehicle safe charging method obtained by combining this embodiment with the above-described embodiment two, please refer to... Figure 5 , Figure 5 This is a simplified flowchart illustrating the vehicle safe charging method provided in Embodiment 2 of the present invention. Specifically:

[0115] Step S204': Maintain the hard-wired signal and the CAN transmission according to the stop charging signal.

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

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

[0118] Understandably, the hard-wired signals and CAN transmissions that need to be maintained will differ depending on the different charging stop signals mentioned above.

[0119] In practice, the EVCC chip will maintain different hard-wired signals and CAN transmissions according to the specific stop charging signal, ensuring that the vehicle remains in an unstartable state even after charging is complete and the discharge gun has not yet left the vehicle.

[0120] Step S205': During the transmission of the hard-wired signal and the CAN, detect whether the target resistance value is received.

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

[0122] Step S206': If not, then stop the transmission of the hard-wired 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 can control the vehicle to start through the PDCU according to the start signal.

[0123] It should be noted that the above-mentioned start signal can be a signal indicating that the vehicle has finished charging.

[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-wired signal is stopped according to the stop charging signal, and the start signal is sent to the battery management system via the CAN bus, so that the battery management system controls the vehicle to start according to the start signal via the PDCU.

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

[0126] Step S2041': When the slow charging stop signal transmitted by the battery management system is received, the CCOUT hardwire signal is continuously transmitted to the vehicle charger according to the slow charging stop signal, and the slow charging signal is continuously transmitted to the battery management system via the CAN bus.

[0127] It should be noted that the aforementioned slow charging stop signal indicates that the vehicle has completed slow charging.

[0128] In the specific implementation, when the slow charging stop signal transmitted by the battery management system is received, it means that the vehicle has been fully charged in slow charging mode. However, the vehicle has not yet been separated from the charging pile. Therefore, it is necessary to continue transmitting the CCOUT hard wire signal to the on-board charger according to the slow charging stop signal, and continue to send the slow charging signal to the battery management system through the CAN bus. The purpose is to ensure that the vehicle cannot be started when the discharge gun has not yet left the vehicle.

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

[0130] Step S2042': When the fast charging 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 charging stop signal, while the fast charging signal is still transmitted to the battery management system via the CAN bus.

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

[0132] In the 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 fast charging mode. However, the vehicle has not yet 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 continue to send the fast charging signal to the battery management system through the CAN bus. The purpose is to ensure that the vehicle cannot be started when the discharge gun has not yet left the vehicle.

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

[0134] Step S2061': When the target resistance value is not received, stop transmitting the CCOUT hardwire signal to the vehicle charger and the start signal to the battery management system via the CAN bus according to the slow charging stop signal.

[0135] In a specific implementation, if the target resistance value is not received, it indicates that the vehicle has been separated from the charging pile and the vehicle enters the standby mode. At this time, 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 via the CAN bus stop are stopped according to the slow charging stop signal.

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

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

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

[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, the instructions being executed by the at least one processor to enable the at least one processor to perform the vehicle safety charging method in Embodiment 1 above.

[0140] The following is for reference. Figure 6 The diagram illustrates a structural schematic suitable for implementing vehicle safety charging devices according to embodiments of the present invention. Vehicle safety charging devices in embodiments of the present invention may include, but are not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 5 The vehicle safety charging device shown is merely an example and should not be construed as limiting the functionality 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 unit 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the vehicle safety charging device. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via 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: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. The communication device 1009 allows the vehicle safety charging device to communicate wirelessly or wiredly with other devices to exchange data. Although the figures show vehicle safety charging devices with various systems, it should be understood that implementation or possession of all the systems shown is not required. More or fewer systems may be implemented alternatively.

[0142] In particular, according to the embodiments disclosed in this invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this invention include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this invention.

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

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

[0145] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

[0146] The above description is only a part of the embodiments of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the technical concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for safe charging of a vehicle, characterized in that, The vehicle safe charging method includes: When a vehicle needs to be charged, detect whether the target resistance value output by the charging pile exists when the discharge gun is connected to the vehicle. If so, the CCOUT hardwired 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 can control the vehicle to prevent starting and perform safe charging according to the target resistance value through the PDCU; Obtain the duty cycle of the PWM voltage signal output by the charging pile; The target charging signal is determined based on 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 target charging signal includes a slow charging signal. The step of determining the target charging signal based on 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 the first preset resistance value condition and the duty cycle of the PWM voltage signal reaches the first preset duty cycle condition, the slow charging signal is obtained; Based on the slow charging signal, the CCOUT hardwire signal is continuously transmitted to the vehicle charger, and the slow charging signal is sent to the battery management system via the CAN bus, so that the battery management system controls the vehicle to charge according to the slow charging signal.

2. The vehicle safe charging method as described in claim 1, characterized in that, The target charging signal includes a fast charging signal. The step of determining the target charging signal based on 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: When the target resistance value reaches the second preset resistance value condition and the PWM voltage signal duty cycle reaches the second preset duty cycle condition, the fast charging signal is obtained; Based on the fast charging signal, the transmission of the CCOUT hardwire signal to the vehicle charger is stopped, and the CC2 hardwire signal and the A+ hardwire signal are transmitted to the battery management system. The fast charging signal is then sent to the battery management system via the CAN bus, so that the battery management system controls the vehicle to charge according to the fast charging signal.

3. The vehicle safe charging method as described in claim 1, characterized in that, After determining the target charging signal based on 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: Detect the stop charging signal transmitted by the battery management system; The hard-wire signal and the CAN transmission are maintained according to the stopped charging signal; During the transmission of the hard-wired signal and the CAN signal, it is detected whether the target resistance value is received. If not, the transmission of the hard-wired signal is stopped according to the stop charging signal, and a start signal is sent to the battery management system via the CAN bus, so that the battery management system controls the vehicle to start via the PDCU according to the start signal.

4. The vehicle safe charging method as described in claim 3, characterized in that, The target charging signal includes a slow charging stop signal, and the step of maintaining the hard-wired signal and the CAN transmission according to the stop charging signal includes: When the slow charging stop signal is received from the battery management system, the CCOUT hardwire signal is continuously transmitted to the vehicle charger according to the slow charging stop signal, and the slow charging signal is continuously sent to the battery management system via the CAN bus.

5. The vehicle safe charging method as described in claim 3, characterized in that, The target charging signal includes a fast charging stop signal, and the step of maintaining the hard-wired signal and the CAN transmission according to the stop charging signal further includes; When the fast charging stop signal is received from the battery management system, the transmission of the A+ hard wire signal to the battery management system is stopped according to the fast charging stop signal, while the fast charging signal is still sent to the battery management system via the CAN bus.

6. The vehicle safe charging method as described in claim 3, characterized in that, The target charging signal includes the slow charging stop signal. The steps of stopping the transmission of the hard-wired signal and sending a start signal to the battery management system via the CAN according to the stop charging signal if not included are as follows: When the target resistance value is not received, the transmission of the CCOUT hardwire signal to the vehicle charger and the transmission of the start signal to the battery management system via the CAN bus are stopped according to the slow charging stop signal.

7. The vehicle safe charging method as described in claim 3, characterized in that, The target charging signal includes the fast charging stop signal. The steps of stopping the transmission of the hard-wired signal and sending a start signal to the battery management system via the CAN according to the stop charging signal if not, also include: When the target resistance value is not received, the transmission of the CC2 hard-wire signal to the battery management system and the transmission of the start signal to the battery management system via the CAN bus are stopped according to the fast charging stop signal.

8. A method and apparatus for safe charging of vehicles, characterized in that, The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the vehicle safe charging method as claimed in any one of claims 1 to 7.

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