Charging system, charging control method and vehicle

Abstract

Provided in the present application are a charging system, a charging control method and a vehicle. The charging system comprises: a vehicle-mounted charger, a wake-up auxiliary circuit and a battery management system, wherein the wake-up auxiliary circuit comprises a first diode and a second diode, a positive electrode of the first diode being electrically connected to a charging output port of the vehicle-mounted charger, a positive electrode of the second diode being electrically connected to a direct-current charging vehicle interface, and a negative electrode of the first diode and a negative electrode of the second diode being electrically connected to the same port of the battery management system.

Description

Charging system, charging control method and vehicle

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 22, 2023, with application number 202311572679.7. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a charging system, a charging control method and a vehicle. Background Art

[0003] During the charging process of electrical devices, such as electric vehicles, the Battery Management System (BMS) needs to be activated and awakened to control whether the device is charging via DC or AC. Corresponding to the two charging modes, the BMS can be activated and awakened via DC charging or AC charging. SUMMARY OF THE INVENTION

[0004] In related technologies, when an electrical device is undergoing AC charging, its Control Pilot (CP) signal is detected by the vehicle controller, causing the DC charging wake-up and AC charging wake-up to each use the I / O interface of the battery management system, resulting in an excessive number of interfaces in the battery management system and high costs.

[0005] In the first aspect, the present application provides a charging system for use in a vehicle, the charging system comprising: an on-board charger, a wake-up auxiliary circuit and a battery management system; wherein the on-board charger is provided with a charging input port and a charging output port; the wake-up auxiliary circuit comprises a first diode and a second diode, the positive pole of the first diode is electrically connected to the charging output port, the positive pole of the second diode is electrically connected to the DC charging vehicle interface, the negative pole of the first diode and the negative pole of the second diode are electrically connected to the same port of the battery management system; the first diode is configured to transmit an AC charging wake-up signal emitted by an AC charging pile, and the AC charging wake-up signal is configured to wake up the battery management system during AC charging; the second diode is configured to transmit a DC charging wake-up signal emitted by a DC charging pile, and the DC charging wake-up signal is configured to wake up the battery management system during DC charging.

[0006] In the second aspect, the present application provides a charging control method, which is applied to a charging system. The charging control method includes: obtaining a wake-up signal and a message signal; the wake-up signal is a DC charging wake-up signal or an AC charging wake-up signal, and the message signal is a DC fast charging mode message signal or an AC slow charging mode message signal; waking up the battery management system according to the wake-up signal; starting the target charging mode corresponding to the message signal according to the message signal; and charging the vehicle in the target charging mode.

[0007] In a third aspect, the present application provides a vehicle, comprising: the charging system provided in the first aspect, or executing the charging control method provided in the second aspect. Beneficial effects

[0008] The charging system provided in the present application connects the cathode of the first diode and the cathode of the second diode in parallel to the same port of the battery management system, thereby enabling the use of the same port of the battery management system to transmit two charging wake-up signals, thereby reducing the number of interfaces of the battery management system occupied by charging wake-up and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1 shows a block diagram of a charging system of the present application;

[0010] FIG2 shows a schematic structural diagram of the charging system of the present application;

[0011] FIG3 shows a schematic diagram of a wake-up auxiliary circuit of the present application;

[0012] FIG4 shows an application schematic diagram of the charging system of the present application;

[0013] FIG5 shows a flow chart of the charging control method of the present application;

[0014] FIG6 is a schematic diagram showing a charging control method of the present application;

[0015] FIG7 shows a schematic diagram of the AC slow charging mode of the present application.

[0016] Description of reference numerals:

[0017] 101. On-board charger; 102. Wake-up auxiliary circuit; 103. Battery management system; 104. Vehicle interface; 105. Battery pack; 1041. AC charging vehicle interface; 1042. DC charging vehicle interface; 106. High-voltage distribution box; 107. Vehicle controller; 10. Vehicle. Modes for Carrying Out the Invention

[0018] In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements.

[0019] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, with the first feature having a higher horizontal height than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, with the first feature having a lower horizontal height than the second feature.

[0020] In the description of this embodiment, terms such as "upper," "lower," "left," "right," "front," and "rear" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and do not have any special meanings.

[0021] Please refer to Figure 1, which shows a block diagram of the charging system of the present application. As shown in Figure 1, the charging system is applied to a vehicle 10 and includes: an on-board charger (OBC) 101, a wake-up auxiliary circuit 102, and a battery management system 103.

[0022] The onboard charger 101 is provided with a charging input port and a charging output port. The wake-up assist circuit 102 includes a first diode and a second diode. The anode of the first diode is electrically connected to the charging output port, the anode of the second diode is electrically connected to the DC charging vehicle interface, and the cathodes of the first and second diodes are electrically connected to the same port of the battery management system 103. The first diode is configured to transmit an AC charging wake-up signal from an AC charging station, which is configured to wake up the battery management system 103 during AC charging. The second diode is configured to transmit a DC charging wake-up signal from a DC charging station, which is configured to wake up the battery management system 103 during DC charging.

[0023] By connecting the cathode of the first diode and the cathode of the second diode in parallel to the same port of the battery management system 103, it is possible to transmit two charging wake-up signals using the same port of the battery management system, thereby reducing the number of interfaces of the battery management system occupied by charging wake-up and reducing costs.

[0024] Please refer to Figure 2, which shows a schematic diagram of the charging system of the present application. As shown in Figure 2, the vehicle also includes a vehicle interface 104 and a battery pack 105. A battery management system 103 and battery pack 105 are both part of the battery pack 100. The battery management system 103 is electrically connected to the battery pack 105 to manage and control the battery pack 105.

[0025] It should be noted that electric vehicle charging methods are categorized as fast charging and slow charging. Fast charging involves charging an electric vehicle using a fast charging station (i.e., a DC charging station), while slow charging involves charging an electric vehicle using a slow charging station (i.e., an AC charging station). A DC charging station may be equipped with an off-board charger 101 to convert AC power to DC power for fast charging of the electric vehicle; an AC charging station may not be equipped with an off-board charger 101. In contrast to an AC charging station, an on-board charger 101 is installed in the vehicle. The AC charging station is configured to provide a standard AC charging interface, and the on-board charger 101 is configured to convert the received AC current into DC power to charge the battery pack 105.

[0026] In this application, although not shown in FIG2 , the charging system may include a charging pile, which may be a DC charging pile or an AC charging pile. Accordingly, the vehicle interface 104 includes a DC charging vehicle interface 1042 and an AC charging vehicle interface 1041 . The DC charging vehicle interface 1042 is electrically connected to the DC charging pile, and the AC charging vehicle interface 1041 is electrically connected to the AC charging pile.

[0027] Optionally, the DC charging vehicle interface 1042 is electrically connected to a DC charging pile via a charging gun that complies with the DC charging standard, and the AC charging vehicle interface 1041 is electrically connected to an AC charging pile via a charging gun that complies with the AC charging standard. The anode of the second diode is electrically connected to the DC charging vehicle interface 1042 to transmit the DC charging wake-up signal.

[0028] In one embodiment, as shown in Figure 2, the charging system further includes a high-voltage distribution box 106, which is electrically connected to a DC charging vehicle interface 1042 and the onboard charger 101. When charging using DC, the DC signal is transmitted to the high-voltage distribution box 106 via the DC charging vehicle interface 1042. When charging using AC, the AC signal must first be converted to a DC signal by the onboard charging interface, and then the converted DC signal is transmitted to the high-voltage distribution box 106. After processing the DC signal, the high-voltage distribution box 106 can use the processed DC signal to charge the battery pack 105.

[0029] In one embodiment, the onboard charger 101 is provided with a charging input port and a charging output port. The charging input port is electrically connected to the AC charging vehicle interface 1041 , and the charging output port is electrically connected to the high-voltage distribution box 106 .

[0030] Please refer to FIG. 2 , the charging system further includes a vehicle controller 107 . The vehicle controller 107 is electrically connected to the high-voltage distribution box 106 so as to control the high-voltage distribution box 106 to process the DC signal.

[0031] Please refer to Figure 3, which shows a schematic diagram of the wake-up assist circuit of the present application. As shown in Figure 3, the wake-up assist circuit 102 includes: a first diode D1 and a second diode D2. The anode of the first diode D1 is electrically connected to the charging output port to transmit an AC charging wake-up signal, which is configured to wake up the battery management system 103 during AC charging. The anode of the second diode D2 is electrically connected to the DC charging vehicle interface 1042 to transmit a DC charging wake-up signal, which is configured to wake up the battery management system 103 during DC charging.

[0032] In one embodiment, the battery management system 103 is provided with a charging awakening port, and the cathode of the first diode D1 and the cathode of the second diode D2 are electrically connected to the same charging awakening port A+ of the battery management system 103 .

[0033] Because the cathodes of the first and second diodes are connected in parallel to the same charge wake-up port of battery management system 103, two charge wake-up signals can be transmitted using the same port of the battery management system. This reduces the number of battery management system 103 interfaces occupied by the charge wake-up signal, thereby lowering costs. Furthermore, because the diodes are unidirectionally conductive, a DC charge wake-up signal operating without affecting AC charging, and vice versa, an AC charge wake-up signal operating without affecting DC charging. In other words, DC and AC charge wake-up signals are independent of each other, improving the safety of the charge wake-up process.

[0034] Please refer to Figure 4, which shows an application diagram of the charging system of the present application. As shown in Figure 4, the charging system can be divided into a charging pile end and a vehicle end. The charging pile is provided with a vehicle plug, and the vehicle is provided with a vehicle socket. The vehicle plug and the vehicle socket can be electrically connected through a charging gun. In some embodiments, the vehicle socket and the vehicle interface 104 can be the same component. It is worth noting that Figure 4 mainly illustrates the AC charging method, and the charging pile in Figure 4 can be an AC charging pile.

[0035] In one embodiment, the vehicle interface 104 includes a control pilot pin configured to transmit a control pilot (CP) signal from a DC or AC charging station. The control pilot signal can be configured to monitor and control the charging status. The vehicle also includes a third diode D3, the anode of which is electrically connected to the control pilot pin and the cathode of which is electrically connected to the battery management system 103. The cathode of the third diode D3 serves as the first detection point, i.e., detection point 1.

[0036] In one embodiment, the vehicle interface 104 further includes a ground pin PE, which is connected to ground. The vehicle further includes a first resistor R1, a second resistor R2, and a first switch S1. The first end of the first resistor R1 is electrically connected to the cathode of the third diode D3, and the second end of the first resistor R1 is electrically connected to the ground pin PE. The first end of the second resistor R2 is electrically connected to the cathode of the third diode D3, and the second end of the second resistor R2 is electrically connected to the first end of the first switch S1. The first switch S1 has a second end electrically connected to the ground pin PE, and a third end electrically connected to the battery management system 103. The first switch S1 is configured to control whether the second resistor R2 is connected to ground, and the battery management system 103 controls the on / off state of the first switch S1.

[0037] Optionally, the first switch S1 may be a low voltage relay. The resistance of the second resistor R2 is equal to the resistance of the first resistor R1.

[0038] In one embodiment, a charging pile includes: a power supply control device, a second switch S2, and a third resistor R3. The power supply control device includes a power supply output terminal, a power supply ground terminal, a detection terminal, and a control signal output terminal. The power supply output terminal is electrically connected to the battery management system 103, and the power supply ground terminal is grounded. The first terminal of the second switch S2 is electrically connected to the control signal output terminal (PWM) or the power supply output terminal (+12V), and the second terminal of the second switch S2 is electrically connected to the first terminal of the third resistor R3. The second terminal of the third resistor R3 is electrically connected to the control guide pin and the detection terminal. The second terminal of the third resistor R3 serves as a second detection point, i.e., detection point 2.

[0039] Optionally, the resistance of the third resistor R3 is half of the resistance of the first resistor R1.

[0040] In one embodiment, the vehicle interface 104 further includes a charging connection confirmation pin configured to transmit a charging connection confirmation (CC) signal. The charging connection confirmation signal can be configured to confirm whether the vehicle plug and vehicle socket are fully connected in slow charging mode. The charging pile also includes a fourth resistor R4, a first end of which is electrically connected to the charging connection confirmation pin and connected to the battery management system 103 via the charging connection confirmation pin, and a second end of the fourth resistor R4 is grounded. The vehicle plug can serve as the external charging interface of the charging pile, and the fourth resistor R4 can be disposed within the vehicle plug.

[0041] In one embodiment, the vehicle interface 104 further includes: three-phase AC power pins, such as L and N in FIG4 . A third switch K1 and a fourth switch K2 may be provided between the L line and the N line between the three-phase AC power pins and the charging station, respectively, and are configured to control whether the three-phase AC power from the charging station is output to the vehicle interface 104. DC+ represents the positive DC charging voltage when the vehicle is DC charged, and DC- represents the negative DC charging voltage when the vehicle is DC charged.

[0042] This application also provides a vehicle, comprising: a charging system provided in this application or executing the charging control method provided in this application. It is understood that in addition to the charging system, the vehicle may also be equipped with other systems or components, and this application does not limit the other systems or components of the vehicle.

[0043] Please refer to Figure 5, which shows a flow chart of the charging control method of the present application. In the present application, the charging control method is applied to a charging system. The charging control method may be executed by the battery management system 103, which includes a processor configured to execute the charging control method.

[0044] As shown in FIG5 , the charging control method includes: step S1 , step S2 , step S3 and step S4 .

[0045] Step S1: Acquire a wake-up signal and a message signal; the wake-up signal is a DC charging wake-up signal or an AC charging wake-up signal, and the message signal is a DC fast charging mode message signal or an AC slow charging mode message signal.

[0046] In one embodiment, when the vehicle's DC charging vehicle interface 1042 is connected to the charging plug of a DC charging pile, a DC charging wake-up signal can be issued by the DC charging device in the DC charging pile and sent to the charging wake-up port A+ of the battery management system 103 via the DC charging vehicle interface 1042 to activate the battery management system 103. A communication bus, such as a CAN bus, can be arranged in the vehicle to identify a specific charging mode. After the vehicle's DC charging vehicle interface 1042 is connected to the charging plug of the DC charging pile, the communication bus automatically generates a DC fast charging mode message signal and sends the DC fast charging mode message signal to the battery management system 103.

[0047] In one embodiment, when the vehicle's AC charging vehicle interface 1041 is connected to the charging plug of an AC charging station, an AC charging wake-up signal can be sent by the onboard charger 101 to the charging wake-up port A+ of the battery management system 103 to activate the battery management system 103. A communication bus, such as a CAN bus, can be deployed within the vehicle to identify a specific charging mode. After the vehicle's AC charging vehicle interface 1041 is connected to the charging plug of the AC charging station, the communication bus automatically generates an AC slow charging mode message signal and sends the AC slow charging mode message signal to the battery management system 103.

[0048] Step S2: Wake up the battery management system according to the wake-up signal.

[0049] In one embodiment, the wake-up signal may be a DC charging wake-up signal or an AC charging wake-up signal. The DC charging wake-up signal may wake up the battery management system 103 in a DC charging scenario, so that the battery management system can operate normally in the DC charging scenario. The AC charging wake-up signal may wake up the battery management system 103 in an AC charging scenario, so that the battery management system can operate normally in the AC charging scenario.

[0050] Step S3: starting the target charging mode corresponding to the message signal according to the message signal.

[0051] In one embodiment, after the battery management system 103 is awakened by the awakening signal, it starts the target charging mode corresponding to the message signal according to the message signal and generates target charging information corresponding to the target charging mode.

[0052] In one embodiment, the target charging mode may be a DC fast charging mode or an AC slow charging mode. The battery management system 103 may be awakened by a DC charging wake-up signal or an AC charging wake-up signal. After being awakened by the DC charging wake-up signal, the battery management system 103 may start the DC fast charging mode according to the received DC fast charging mode message signal and generate target charging information corresponding to the target charging mode in the DC fast charging mode. In this case, the target charging information may be DC charging current and DC charging voltage information.

[0053] In one embodiment, after being awakened by an AC charging awakening signal, the battery management system 103 can initiate the AC fast charging mode according to the received AC fast charging mode message signal and generate target charging information corresponding to the target charging mode in the AC fast charging mode. In this case, the target charging information can be AC ​​charging current and AC charging voltage information.

[0054] Step S4: charging the vehicle in the target charging mode.

[0055] Please refer to Figure 6, which shows a schematic diagram of the charging control method of the present application. As shown in Figure 6, after connecting the vehicle plug and the vehicle interface 104, the power is first turned on using the power supply control device on the charging pile side. The power supply control device can be a low-voltage auxiliary power supply. After the power supply control device is operating normally, it will output 12V power to the battery management system 103, vehicle controller 107, on-board charger 101 and other components on the vehicle side for powering. If the power-on process fails, the charging process can be directly terminated.

[0056] If power is successfully applied, the battery management system 103 is activated using a DC wake-up signal or an AC wake-up signal. If the battery management system 103 receives the wake-up signal, it can further receive a charging mode message corresponding to the wake-up signal from the communication bus. After receiving the charging mode message, it generates target charging information to activate the corresponding charging mode. If the battery management system 103 does not receive the wake-up signal or the charging mode message, it can directly terminate the charging process.

[0057] When the battery management system 103 is activated in the AC slow charging mode, the battery management system 103 needs to further determine whether the CC signal and the CP signal meet the requirements, and if so, enter the AC charging process. When the battery management system 103 is activated in the DC fast charging mode, the battery management system 103 needs to further determine whether the CC2 signal meets the requirements, and if so, enter the DC charging process. Whether in fast charging mode or slow charging mode, the charging process can be terminated directly if the above requirements are not met.

[0058] Please refer to Figure 7, which shows a schematic diagram of the AC slow charging mode of the present application. The specific working process of the charging control method will be described below in conjunction with the AC slow charging mode.

[0059] In one embodiment, the target charging mode includes an AC slow charging mode and a DC fast charging mode. Charging the vehicle in the target charging mode includes:

[0060] Step S31: when the target charging mode is the AC slow charging mode, obtaining a voltage signal at the first detection point.

[0061] In one embodiment, when the target charging mode is the AC slow charging mode, the battery management system 103 may detect a voltage signal at a first detection point at the beginning of the AC slow charging mode.

[0062] Step S32: determining whether the voltage signal at the first detection point is a pulse width modulation signal with a preset first amplitude.

[0063] In one embodiment, optionally, the first amplitude can be 9V. The first end of the second switch can be connected to the control signal output end (PWM) or to the power supply output end (+12V). Before the vehicle plug is inserted into the vehicle interface 104, the second switch is connected to the power supply output end. The power supply control device identifies the charging connection status by detecting the voltage signal of the detection point 2. When the vehicle plug is connected to the vehicle interface 104, the battery management system 103 detects that the voltage of the first detection point is 9V, and when the power supply control device detects that the voltage of the detection point 2 is 9V, it determines that the charging connection is completed. At this time, the power supply control device switches the first end of the second switch to the control signal output end. The power supply control device sends a PWM signal.

[0064] Step S33: When the voltage signal at the first detection point is a pulse width modulation signal with a preset first amplitude, the vehicle is charged.

[0065] Wherein, when the voltage signal at the first detection point is a pulse width modulation signal with a preset first amplitude, charging the vehicle includes:

[0066] Step S331 : when the voltage signal at the first detection point is a pulse width modulation signal with a preset first amplitude, closing the first switch.

[0067] When the battery management system 103 detects a 9V PWM signal at the first detection point and the power supply control device detects a 9V PWM signal at the second detection point, the charging state is now charging facility ready. At this point, the battery management system 103 controls the closing of the first switch, so that the 6V PWM signal is applied to both the first and second detection points. The AC charging station begins AC slow charging and charges the vehicle.

[0068] Step S332: Detect whether the voltage signal at the first detection point is a pulse width modulation signal of a preset second amplitude, and charge the vehicle if the voltage signal at the first detection point is a pulse width modulation signal of the preset second amplitude.

[0069] Optionally, the second amplitude is 6V.

[0070] Wherein, when the voltage signal at the first detection point is a pulse width modulation signal of a preset second amplitude, charging the vehicle includes:

[0071] Step A1: Obtain the rated capacity of the cable of the charging pile corresponding to the resistance value of the fourth resistor.

[0072] Step A2: Determine the first maximum charging current of the charging pile according to the rated capacity of the cable.

[0073] In one embodiment, the battery management system 103 detects the resistance of the fourth resistor and obtains the rated capacity of the charging pile cable based on the resistance of the fourth resistor, thereby obtaining the first maximum charging current supported by the charging pile. The resistance of the fourth resistor has a one-to-one correspondence with the rated capacity of the cable. Different resistance values ​​of the fourth resistor correspond to different rated capacities of the cable.

[0074] Step A3: Obtain duty cycle information of the pulse width modulation signal with a preset second amplitude.

[0075] Step A4: Determine the second maximum charging current of the charging pile according to the duty cycle information.

[0076] In one embodiment, the battery management system 103 detects duty cycle information of the PWM signal, identifies the second maximum charging current of the charging pile according to the duty cycle information, and simultaneously selects a smaller charging current.

[0077] Step A5: Determine a target charging current based on the first maximum charging current and the second maximum charging current, and charge the vehicle with the target charging current.

[0078] The method of determining a target charging current based on the first maximum charging current and the second maximum charging current, and charging the vehicle with the target charging current, includes:

[0079] Step A51: Compare the first maximum charging current and the second maximum charging current.

[0080] Step A52: When the first maximum charging current is greater than the second maximum charging current, the vehicle is charged with the second maximum charging current as the target charging current; when the first maximum charging current is less than or equal to the second maximum charging current, the vehicle is charged with the first maximum charging current as the target charging current.

[0081] In one embodiment, the vehicle interface 104 may further include a CC2 pin configured to confirm charging connection in DC fast charging mode. The operation process in DC fast charging mode is similar to that in AC slow charging mode and will not be further described.

[0082] In summary, in the related art, when the CP signal is detected by the vehicle controller 107, the vehicle controller 107 transmits the relevant information to the battery management system 103 after detection, and the battery management system 103 then issues a request for charging voltage and current information based on the duty cycle information, and the vehicle controller 107 then executes the charging process based on the request information, resulting in a complicated charging process, multiple charging links, and a high probability of error. However, the present application receives a wake-up signal and a message signal. After the battery management system 103 is awakened by the wake-up signal, it starts the target charging mode corresponding to the message signal according to the message signal, and uses the battery management system 103 to detect the CP signal and duty cycle, thereby eliminating the process of converting and receiving data. The battery management system 103 can directly issue a request for charging current information based on the CP signal and duty cycle information detected by itself, thereby solving the complex problem of the charging signal recognition process, simplifying the charging signal detection and recognition process, reducing the work links, improving the charging recognition efficiency, and reducing the error rate, making it more reliable and safe.

Claims

1. A charging system, applied to a vehicle (10), the charging system comprising: An on-board charger (101), a wake-up auxiliary circuit (102) and a battery management system (103); Wherein, the on-board charger (101) is provided with a charging input port and a charging output port; The wake-up auxiliary circuit (102) comprises a first diode (D1) and a second diode (D2), wherein the positive electrode of the first diode (D1) is electrically connected to the charging output port, the positive electrode of the second diode (D2) is electrically connected to the DC charging vehicle interface (1042), and the negative electrode of the first diode (D1) and the negative electrode of the second diode (D2) are electrically connected to the same port of the battery management system (103); The first diode (D1) is configured to transmit an AC charging wake-up signal sent by an AC charging pile, and the AC charging wake-up signal is configured to wake up the battery management system (103) during AC charging; The second diode (D2) is configured to transmit a DC charging wake-up signal sent by a DC charging pile, and the DC charging wake-up signal is configured to wake up the battery management system (103) during DC charging.

2. The charging system according to claim 1, wherein: The vehicle (10) further comprises: a vehicle interface (104), the vehicle interface (104) comprising: a control guide pin, the control guide pin being configured to transmit a control guide signal emitted by the DC charging pile or the AC charging pile, the vehicle (10) further comprising: A third diode (D3), wherein the anode of the third diode (D3) is electrically connected to the control guide pin, and the cathode of the third diode (D3) is electrically connected to the battery management system (103).

3. The charging system according to claim 2, wherein: The vehicle interface (104) further includes: a ground pin (PE), the ground pin (PE) being grounded, and the vehicle (10) further includes: a first resistor (R1), wherein a first end of the first resistor (R1) is electrically connected to the cathode of the third diode (D3), and a second end of the first resistor (R1) is electrically connected to the ground pin (PE); a second resistor (R2), wherein a first end of the second resistor (R2) is electrically connected to the cathode of the third diode (D3), and a second end of the second resistor (R2) is electrically connected to the first end of the first switch (S1); A first switch (S1), wherein a second end of the first switch (S1) is electrically connected to the ground pin (PE), and a third end of the first switch (S1) is electrically connected to the battery management system (103).

4. The charging system according to claim 3, further comprising: A charging pile, the charging pile comprising: A power supply control device, the power supply control device being provided with a power supply output terminal, a power supply ground terminal, a detection terminal and a control signal output terminal, the power supply output terminal being electrically connected to the battery management system (103), and the power supply ground terminal being grounded; a second switch, wherein a first end of the second switch is electrically connected to the control signal output end or the power supply output end, and a second end of the second switch is electrically connected to a first end of a third resistor; A third resistor, wherein a second end of the third resistor is electrically connected to the control guide pin and the detection end.

5. The charging system according to any one of claims 1 to 4, wherein: The vehicle interface (104) further comprises a charging connection confirmation pin, the charging connection confirmation pin being configured to transmit a charging connection confirmation signal, and the charging pile further comprises a fourth resistor, a first end of the fourth resistor being electrically connected to the charging connection confirmation pin, and a second end of the fourth resistor being grounded.

6. The charging system according to any one of claims 1 to 4, further comprising: A charging pile, the charging pile comprising: a DC charging pile and an AC charging pile, the vehicle interface (104) comprising: a DC charging vehicle interface (1042) and an AC charging vehicle interface (1041), the DC charging vehicle interface (1042) being electrically connected to the DC charging pile, the AC charging vehicle interface (1041) being electrically connected to the AC charging pile, and the charging input port being electrically connected to the AC charging vehicle interface (1041).

7. A charging control method, the charging control method being applied to the charging system according to any one of claims 1 to 6, the charging control method comprising: Get wake-up signal and message signal; The wake-up signal is a DC charging wake-up signal or an AC charging wake-up signal, and the message signal is a DC fast charging mode message signal or an AC slow charging mode message signal; Waking up the battery management system according to the wake-up signal; Starting a target charging mode corresponding to the message signal according to the message signal; The vehicle is charged in the target charging mode.

8. The charging control method according to claim 7, wherein: The target charging mode includes: an AC slow charging mode, and charging the vehicle in the target charging mode includes: When the target charging mode is an AC slow charging mode, obtaining a voltage signal of a first detection point; Determining whether the voltage signal at the first detection point is a pulse width modulation signal with a preset first amplitude; When the voltage signal at the first detection point is a pulse width modulation signal with a preset first amplitude, the vehicle is charged.

9. The charging control method according to claim 8, wherein: When the voltage signal at the first detection point is a pulse width modulation signal with a preset first amplitude, charging the vehicle comprises: When the voltage signal at the first detection point is a pulse width modulation signal with a preset first amplitude, closing the first switch; It is detected whether the voltage signal at the first detection point is a pulse width modulation signal of a preset second amplitude, and the vehicle is charged when the voltage signal at the first detection point is a pulse width modulation signal of the preset second amplitude.

10. The charging control method according to claim 8, wherein: When the voltage signal at the first detection point is a pulse width modulation signal with a preset second amplitude, charging the vehicle comprises: Obtaining a rated cable capacity of the charging pile corresponding to the resistance value of the fourth resistor; Determining a first maximum charging current of the charging pile according to the rated capacity of the cable; Obtaining duty cycle information of a pulse width modulation signal of a preset second amplitude; Determine a second maximum charging current of the charging pile according to the duty cycle information; A target charging current is determined based on the first maximum charging current and the second maximum charging current, and the vehicle is charged with the target charging current.

11. The charging control method according to claim 10, wherein: The determining a target charging current based on the first maximum charging current and the second maximum charging current, and charging the vehicle with the target charging current, comprises: comparing the first maximum charging current and the second maximum charging current; When the first maximum charging current is greater than the second maximum charging current, the vehicle is charged using the second maximum charging current as a target charging current; when the first maximum charging current is less than or equal to the second maximum charging current, the vehicle is charged using the first maximum charging current as a target charging current.

12. A vehicle, comprising the charging system according to any one of claims 1 to 6, or executing the charging control method according to any one of claims 7 to 11.

Images