Charging control system, vehicle and charging control method

Abstract

This application provides a charging control system, a vehicle, and a charging control method. The charging control system includes a first connector for electrical connection to an external power source, a first power supply line electrically connected to the first connector, a second power supply line electrically connected to the first connector, and a power supply control module. The first power supply line can charge the vehicle's power battery. The second power supply line is equipped with a transformer, and the output terminal of the transformer is electrically connected to the control guide CP terminal of the vehicle's socket. The CP terminal is equipped with a third power supply line for charging the vehicle's battery. The power supply control module can control the second and third power supply lines to conduct, so as to charge the vehicle's battery through an external power source. There is no need to set up a separate charging interface for the battery; by reusing the vehicle's existing charging interface, the user can perform the charging operation by plugging in a charging gun, simplifying the user's vehicle charging process.

Description

Technical Field

[0001] This invention relates to the field of vehicle charging technology, and more specifically, to a charging control system, a vehicle, and a charging control method. Background Technology

[0002] With the increasing popularity of new energy vehicles, more and more OEMs are equipping their vehicles with a large number of electronic control units and sensors to improve the user experience. When the vehicle is unlocked and in operation, its low-voltage power supply relies on the onboard DC-DC converter. When the vehicle is locked and in sleep mode, its low-voltage power supply relies on the battery. If the vehicle is parked and not used for a long period, the battery charge will continuously decrease due to dark current.

[0003] When the power battery has power but the storage battery is depleted, the power battery typically charges the storage battery. For example, patent CN117734468A discloses an intelligent vehicle charging control method and system. This method monitors the storage battery's charge level, promptly wakes up the network, and requests high voltage from the high-voltage system. It then controls the onboard DC-DC converter to operate and output low-voltage electricity to charge the storage battery. While this invention can achieve the storage battery charging function, it uses the power battery as the charging source, making the solution limited by the power battery's charge level. When the power battery's charge level falls below a threshold, the charging function becomes unavailable. In extreme conditions, both the power battery and the storage battery may still be depleted.

[0004] When both the vehicle's power battery and storage battery are depleted, the storage battery needs to be charged first, followed by the power battery. In this situation, the storage battery typically requires a separate charging interface to handle charging when the vehicle is completely depleted. For example, patent CN115476818B proposes a power supply port concealed on the exterior of the vehicle body to supply power to the low-voltage circuit inside the vehicle. This invention uses an external power source, overcoming the limitation of the power battery's capacity, but it requires developing a non-standard interface outside the vehicle, poses a short-circuit risk during user operation, and necessitates maintenance of the power supply. Therefore, when the vehicle is completely depleted, there are multiple charging interfaces, making the charging process quite complex. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a charging control system, a vehicle and a charging control method, which can improve the problem of multiple charging interfaces and complex charging process of the vehicle when the whole vehicle is out of power.

[0006] To achieve the above technical objectives, the technical solution adopted in this application is as follows:

[0007] In a first aspect, embodiments of this application provide a charging control system, which includes:

[0008] The first connector is used for electrical connection to an external power source;

[0009] A first power supply line electrically connected to the first connector, the first power supply line being used to charge the vehicle's power battery;

[0010] The second power supply line and the power supply control module are electrically connected to the first connector. The second power supply line is equipped with a transformer, and the output end of the transformer is used to be electrically connected to the control guide CP terminal of the vehicle socket. The CP terminal of the vehicle socket is equipped with a third power supply line for charging the vehicle's battery.

[0011] When the battery is depleted, the power supply control module controls the second power supply line to connect with the third power supply line so as to charge the battery through the external power source.

[0012] In conjunction with the first aspect, in some optional embodiments, the first power supply line includes a live wire, a neutral wire, and a ground wire. The live wire is equipped with a first jumper switch, and the neutral wire is equipped with a second jumper switch. The output terminals of the live wire and the neutral wire are used to electrically connect to an on-board charger on the vehicle-side circuit. The on-board charger is used to charge the power battery, and the vehicle-side circuit is located on the vehicle.

[0013] In conjunction with the first aspect, in some optional embodiments, the system further includes a charging gun detection circuit, which includes a third switch, a fourth resistor connected in series, and a resistor-capacitor circuit. The end of the fourth resistor away from the resistor-capacitor circuit is electrically connected to the neutral wire, and the end of the resistor-capacitor circuit away from the fourth resistor is used to electrically connect to the CC terminal of the vehicle socket for charging connection confirmation. The fourth resistor is connected in parallel with the third switch, which is closed or opened based on the insertion or removal status of the charging gun.

[0014] In conjunction with the first aspect, in some optional implementations, the CC terminal is used to be electrically connected to a vehicle control module in the vehicle-side circuit, and the vehicle control module is used to detect the plugging / unplugging status of the charging gun based on the switching status of the third switch.

[0015] In conjunction with the first aspect, in some optional embodiments, the system further includes peripheral circuitry of the power supply control module, the peripheral circuitry including a first switch and a first resistor;

[0016] The power supply control module includes a first acquisition terminal, a trigger terminal, and a PWM control terminal. The first acquisition terminal is used to acquire the voltage of the CP terminal.

[0017] The first switch can be selectively electrically connected to the trigger terminal and the PWM control terminal, and the first resistor is connected in series between the first switch and the CP terminal.

[0018] In conjunction with the first aspect, in some optional embodiments, the output terminal of the transformer is provided with a fourth switch for controlling the on / off state of the second power supply line.

[0019] In conjunction with the first aspect, in some alternative implementations, the system further includes:

[0020] The vehicle-side circuit installed on the vehicle includes a vehicle control module, an on-board charger, and the third power supply line.

[0021] The on-board charger is electrically connected to the first power supply line and is used to charge the power battery.

[0022] The vehicle control module includes a second acquisition terminal and a third acquisition terminal. The second acquisition terminal is electrically connected to the CP terminal of the vehicle socket through a first diode. The second acquisition terminal is also grounded through a second resistor and a third resistor connected in parallel. The second resistor is connected in series with a second switch.

[0023] The third acquisition terminal is electrically connected to the CC terminal of the vehicle socket;

[0024] The third power supply line includes a second diode and a fifth switch connected in series. The end of the second diode away from the fifth switch is electrically connected to the CP terminal of the vehicle socket, and the end of the fifth switch away from the second diode is used to be electrically connected to the battery.

[0025] In conjunction with the first aspect, in some optional embodiments, the system further includes a leakage current protection module disposed on the first power supply line and the second power supply line.

[0026] In conjunction with the first aspect, in some alternative embodiments, the output end of the first power supply line and the output end of the transformer form a second connector, which is used for electrical connection with the vehicle socket.

[0027] Secondly, embodiments of this application also provide a vehicle, including a vehicle body and the aforementioned charging control system.

[0028] Thirdly, embodiments of this application also provide a charging control method, applied to the aforementioned charging control system, the method comprising:

[0029] When the first connector of the charging control system is electrically connected to an external power source and the second connector of the charging control system is electrically connected to the vehicle socket, the vehicle's power information is obtained.

[0030] When the power information indicates that the vehicle's battery is in a depleted state and the vehicle is not unlocked, the second and third power supply lines of the charging control system are turned on to charge the battery through the external power source. When the vehicle is in a depleted state, the first power supply line of the charging control system is turned off.

[0031] In conjunction with the third aspect, in some optional embodiments, the method further includes:

[0032] When the power information indicates that the vehicle is in a state of total vehicle power depletion and the vehicle has been unlocked, the second and third power supply lines of the charging control system are turned on to charge the battery while the vehicle is in a wake-up state.

[0033] In conjunction with the third aspect, in some optional embodiments, the method further includes:

[0034] When the power information indicates that the vehicle's battery is in a low-charge state, the vehicle's power battery is not in a low-charge state, and the vehicle is unlocked, the DC-DC module in the vehicle is controlled to charge the battery.

[0035] In conjunction with the third aspect, in some optional embodiments, the method further includes:

[0036] When the battery charge rises to a preset charge level, the fifth switch in the third power supply line is opened, the first switch is electrically connected to the trigger terminal in the power supply control module, and the first jump-start switch and the second jump-start switch on the first power supply line are both closed to interrupt the charging of the battery by the third power supply line.

[0037] When the output current of the transformer is less than or equal to the preset current, the fourth switch on the second power supply line is controlled to open, and the first switch is controlled to be electrically connected to the control terminal in the power supply control module so as to charge the vehicle's power battery through the first power supply line.

[0038] The invention employing the above technical solution has the following advantages:

[0039] In the technical solution provided in this application, the first power supply line in the charging control system can charge the vehicle's power battery. The second power supply line is equipped with a transformer, and the output end of the transformer is electrically connected to the control guide CP terminal of the vehicle socket. The CP terminal of the vehicle socket is equipped with a third power supply line for charging the vehicle's battery. When the vehicle is completely discharged, the first power supply line is disconnected, and the power supply control module can control the second and third power supply lines to be connected, so that the battery can be charged even when the battery is discharged or the entire vehicle is discharged. Thus, for scenarios where the entire vehicle is discharged, there is no need to set up a separate charging interface for the battery; by reusing the vehicle's existing charging interface, users can perform the charging operation by plugging in a charging gun, simplifying the user's vehicle charging process. Attached Figure Description

[0040] This application can be further illustrated by the non-limiting embodiments given in the accompanying drawings. It should be understood that the following drawings only illustrate some embodiments of this application and should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained from these drawings without any inventive effort.

[0041] Figure 1 This is a schematic diagram of the circuit principle of the charging control system provided in an embodiment of this application.

[0042] Figure 2 This is a flowchart illustrating the charging control method provided in an embodiment of this application.

[0043] Figure 3 This is a schematic diagram of the charging process provided in an embodiment of this application.

[0044] Icons: 10-Charging control system; 11-First charging line; 12-Second charging line; 13-Third charging line; 14-Injection gun detection circuit; 15-CP detection circuit. Detailed Implementation

[0045] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. In the description of this application, terms such as "first" and "second" are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] First Embodiment

[0047] Please refer to Figure 1, this application provides a charging control system 10, which can be applied to a vehicle and can charge the vehicle's battery when the whole vehicle is power-deficient.

[0048] In this embodiment, sensors on the vehicle can collect the power information of the in-vehicle power supply. The power information may include the first remaining power of the power battery and the second remaining power of the battery.

[0049] If the first remaining power is lower than the corresponding power threshold, it indicates that the vehicle is in a high-voltage power-deficient state; if the second remaining power is lower than the corresponding power threshold, it indicates that the vehicle is in a battery power-deficient state.

[0050] When both the first remaining power and the second remaining power are lower than the corresponding power thresholds, it indicates that the vehicle is in a whole-vehicle power-deficient state. The power threshold of the power battery is: the critical value at which the power battery cannot supply power to the high-voltage circuit / high-voltage electrical appliances of the vehicle normally. The power threshold of the battery is: the critical value at which the battery cannot supply power to the low-voltage circuit / low-voltage electrical appliances of the vehicle normally.

[0051] It should be noted that if the vehicle is in a battery power-deficient state and there is also a high-voltage power-deficient state, it indicates that the vehicle is in a whole-vehicle power-deficient state. If both the first remaining power and the second remaining power are higher than the corresponding power thresholds, it indicates that the internal power supplies of the vehicle are not in a power-deficient state.

[0052] Among them, when the vehicle is in a whole-vehicle power-deficient state, the first power supply line 11 of the charging control system 10 is in an open state. After the whole vehicle is power-deficient, if the vehicle is not in a charging state, the vehicle does not have a sleep state and cannot be awakened.

[0053] In this embodiment, the charging control system 10 may include a first connector, a first power supply line 11 electrically connected to the first connector, a second power supply line 12 electrically connected to the first connector, and a power supply control module. The charging control system 10 can be deployed on the charging gun, so that the charging gun can charge the vehicle's battery when the whole vehicle is power-deficient. Among them, the charging gun can be, but is not limited to, a household charging gun, a commercial charging gun (such as a charging gun supporting a commercial charging pile).

[0054] In this embodiment, the first connector can be used as a plug and can be plugged into the socket of an external mains power supply. Among them, the external power supply refers to a power supply outside this vehicle, such as the mains power grid, a generator, the power supply on other vehicles, etc. As an example, the mains power supply can be used as the power supply for charging this vehicle.

[0055] In this embodiment, the first power supply line 11 can be used to charge the vehicle's power battery. The first power supply line 11 is provided with a jump-start switch for controlling the conduction and cut-off of the first power supply line 11.

[0056] For example, the first power supply line 11 includes a live wire (L), a neutral wire (N), and a ground wire (PE). The first connector may include pins that are electrically connected to the live wire, the neutral wire, and the ground wire respectively, and the three pins form a plug.

[0057] The live wire is equipped with a first jumper switch K1, and the neutral wire is equipped with a second jumper switch K2. The output terminals of the live and neutral wires can be electrically connected to the on-board charger on the vehicle's electrical system. The on-board charger is used to charge the power battery. The vehicle's electrical system is located on the vehicle.

[0058] An on-board charger is installed in a vehicle to charge its battery. Based on data provided by the vehicle's Battery Management System (BMS) (such as battery temperature and remaining battery capacity), the on-board charger can dynamically adjust the charging current or voltage parameters and perform corresponding actions to complete the charging process.

[0059] The on-board charger is electrically connected to the first power supply line 11 and is used to charge the power battery. When the vehicle is charging normally (not when the vehicle is completely depleted), the first jumper switch K1 and the second jumper switch K2 are closed, the first power supply line 11 is connected, and the second power supply line 12 and the third power supply line 13 are disconnected. At this time, the on-board charger operates and can charge the vehicle's power battery. The on-board charger can convert alternating current (AC) to direct current (DC) to charge the power battery.

[0060] For example, an on-board charger receives AC power from an external power source, such as 220 volts (V) from a household outlet or 380V from industrial power. Then, it converts the AC power to DC power using a high-frequency switching power supply (typically employing full-bridge, half-bridge, or other DC / DC converter topologies). In this process, transformers and power semiconductor devices (such as IGBTs or MOSFETs) in the power circuit play a crucial role, enabling functions such as voltage transformation, AC-to-DC conversion, and frequency conversion.

[0061] In this embodiment, the second power supply line 12 is equipped with a transformer, and the output terminal of the transformer is used for electrical connection with the CP (Control Pilot) terminal of the vehicle socket. The CP terminal of the vehicle socket is equipped with a third power supply line 13 for charging the vehicle's battery. The vehicle's battery is used to power the vehicle's low-voltage electrical system, for example, to power the vehicle's dashcam after the vehicle is turned off.

[0062] In the second power supply line 12, a transformer is used to step down the voltage of the external power supply to the operating voltage of the vehicle's low-voltage electrical appliances, so as to charge the battery using a low-voltage slow charging method. The operating voltage can be, but is not limited to, 12V, 14V, 24V, etc., and can be flexibly determined according to the actual situation. For example, the transformer can step down 220V AC mains power to 14V output.

[0063] In this embodiment, the charging control system 10 may further include a charging gun detection circuit 14. The charging gun detection circuit 14 includes a third switch S3, a fourth resistor R4 connected in series, and a resistor-capacitor (RC) circuit. The end of the fourth resistor R4 furthest from the RC circuit is electrically connected to the neutral wire, and the end of the RC circuit furthest from the fourth resistor R4 is electrically connected to the CC (Connection Confirm) terminal of the vehicle socket. The fourth resistor R4 is connected in parallel with the third switch S3. The third switch S3 is closed or open based on the charging gun's insertion / removal status.

[0064] The CC terminal is used for electrical connection with the vehicle control module in the vehicle circuit. The vehicle control module can detect the plugging and unplugging status of the charging gun based on the voltage change at the CC terminal caused by the switching state of the third switch S3.

[0065] For example, during charging using the charging gun, the third switch S3 can be opened when the charging gun is inserted and closed when it is removed. When the third switch S3 is closed (i.e., the charging gun is removed), the fourth resistor R4 is short-circuited; when the third switch S3 is open (i.e., the charging gun is inserted), the fourth resistor R4 is used normally. There is a difference in resistance between the CC and PE terminals when the third switch S3 is closed and open. Thus, the vehicle control module can detect whether the charging gun connection is abnormal by detecting the resistance values ​​between the CC and PE terminals.

[0066] Please refer to this again. Figure 1 The output terminals of the live wire, neutral wire, ground wire, CC terminal, and CP terminal can form a vehicle plug, which is compatible with the vehicle socket installed on the vehicle; that is, the vehicle plug can be plugged into the vehicle socket.

[0067] The charging control system 10 may also include peripheral circuitry of the power supply control module, which includes a first switch S1 and a first resistor R1.

[0068] The power supply control module includes a first acquisition terminal, a trigger terminal, and a PWM control terminal. The first acquisition terminal is used to acquire the voltage of the CP terminal. The power supply control module can use the voltage of the CP terminal acquired by the first acquisition terminal to control the charging power of the battery through the PWM terminal.

[0069] Please refer to this again. Figure 1The first switch S1 can be selectively connected to both the trigger terminal and the PWM control terminal, and the first resistor R1 is connected in series between the first switch S1 and the CP terminal. The power supply control module, the first switch S1, the first resistor R1, the first diode D1, the second resistor R2, the third resistor R3, and the third switch S3 form the CP detection circuit 15. The CP detection circuit 15 can send the charging current magnitude to the on-board charger via a PWM control signal, allowing the on-board charger to dynamically adjust the charging power to charge the power battery. The on-board charger can send a charging request to the power supply control module at the charging gun end by controlling the opening / closing of the second switch S2. A closed second switch S2 indicates a charging request; an open second switch S2 indicates the end of charging. Based on the opening / closing status of the second switch S2, the power supply control module detects voltage differences at detection point 1. Based on these voltage changes, the power supply control module can identify whether the vehicle has a charging request and control the opening and closing of jumper switches K1 and K2 accordingly. That is, when the second switch S2 is open, it means that there is no need for high-voltage charging, and therefore the power battery cannot be charged.

[0070] During the charging of the vehicle's battery using the second power supply line 12 and the third power supply line 13, the CP detection circuit 15 does not have its normal function (i.e., it cannot trigger the on-board charger to charge the power battery). Additionally, during this charging period, if the battery's charge level rises to a corresponding threshold or is fully charged, the vehicle-side (e.g., the vehicle control module) can actively disconnect the fifth switch S5, thereby ending the charging of the battery by the third power supply line 13. Simultaneously, the current at the CP terminal flows through the first diode D1 and the third resistor R3 (the resistance of the third resistor R3 is relatively large and much greater than the resistance of the second resistor R2) to the vehicle ground. Due to the large resistance of the third resistor R3, the current at detection point 1 will change from a large current to a smaller current (typically tens of milliamps) before and after the fifth switch S5 is disconnected. At the same time, the charging gun end (e.g., the power supply control module) controls the fourth switch S4 to disconnect. At this point, the CP detection circuit 15 can resume its normal function (i.e., it has the function required by national standard GBT 18487.1-2015) and can normally trigger the on-board charger to charge the power battery.

[0071] In this embodiment, the first switch S1 can be a single-pole multi-throw switch (such as a single-pole double-throw switch).

[0072] A fourth switch S4 is installed at the output end of the transformer to control the on / off state of the second power supply line 12. The fourth switch S4 can be a push-button switch on the charging gun, which can be triggered manually or by the power supply control module.

[0073] The charging control system 10 may also include vehicle-side circuitry installed on the vehicle. The vehicle-side circuitry includes a vehicle control module, an on-board charger, and a third power supply line 13.

[0074] The vehicle control module includes a second acquisition terminal and a third acquisition terminal. The second acquisition terminal is electrically connected to the CP terminal of the vehicle socket through a first diode D1. The second acquisition terminal is also grounded through a second resistor R2 and a third resistor R3 connected in parallel. The first diode D1 is used to prevent backflow / reverse current to improve circuit safety.

[0075] The second resistor R2 is connected in series with the second switch S2. The closing and opening of the second switch S2 causes a voltage change at the CP terminal, which can be used to indicate whether the vehicle has a slow charging request. For example, when the second switch S2 is closed, the second resistor R2 is connected to the circuit, indicating a slow charging request that needs to be executed; when the second switch S2 is open, the second resistor R2 is not connected to the circuit, indicating no slow charging request that needs to be interrupted.

[0076] Please refer to this again. Figure 1 The third acquisition terminal is electrically connected to the CC terminal of the vehicle socket. The vehicle control module can detect the voltage of the CC terminal (detection point 3) through the third acquisition terminal.

[0077] The third power supply line 13 includes a second diode D2 and a fifth switch S5 connected in series. The end of the second diode D2 away from the fifth switch S5 is electrically connected to the CP terminal of the vehicle socket, and the end of the fifth switch S5 away from the second diode D2 is used to be electrically connected to the battery.

[0078] In this embodiment, the fifth switch S5 can work in conjunction with the fourth switch S4 to control the charging of the battery. When the charging gun is correctly connected to the external power source and the vehicle, and both the fourth switch S4 and the fifth switch S5 are closed, the vehicle's battery can be charged. If either the fourth switch S4 or the fifth switch S5 is opened, the charging of the battery will be disconnected.

[0079] In this embodiment, the second diode D2 is used to prevent the battery current from flowing back / reverse and to prevent the battery current from flowing out through the third power supply line 13, thereby improving the safety of the circuit.

[0080] In this embodiment, the charging control system 10 may further include a leakage protection module disposed on the first power supply line 11 and the second power supply line 12.

[0081] The core working principle of a residual current device (RCD) is to identify leakage by detecting the current balance in the circuit. Under normal circumstances, the power circuit of the charging control system 10 is closed, with current flowing from the power source through the equipment and back to the power source, forming a loop. In this closed loop, the current inflow and outflow are balanced; that is, the inflow current equals the outflow current. However, when leakage occurs in electrical equipment, some current will escape through insulation faults or the equipment casing to the ground or other media, thus disrupting the original current balance. The RCD utilizes the current balance principle; when it detects an imbalance in current inflow and outflow, it quickly cuts off the power supply to achieve the purpose of protection.

[0082] For example, when the leakage protection module detects a leakage, it can control the fourth switch S4, the first jumper switch K1, and the second jumper switch K2 to be in the open state.

[0083] Please refer to this again. Figure 1 The output end of the first power supply line 11 and the output end of the transformer form a second connector (referring to the vehicle plug), which is used for electrical connection with the vehicle socket.

[0084] In this embodiment, the first switch S1, the fourth switch S4, the first jump-start switch K1, the second jump-start switch K2, the leakage protection module, and the power supply control module can be deployed together as a functional box for the charging gun. The first connector can be used as a plug for the charging gun to connect to an external power source, and the second connector can be used as a plug for the charging gun to connect to the vehicle charging port / vehicle socket.

[0085] Compared to existing charging systems, this application connects a low-voltage power supply line (third power supply line 13) in parallel to the CP input terminal of the charging port on the vehicle side to the positive terminal of the battery. A relay switch (fifth switch S5) is connected to this power supply line, which can be controlled to close or open via a push-button switch on the external charging port panel and the internal control circuit.

[0086] Additionally, on the charging gun side, a 220V to 12V transformer is added internally. The output of this transformer, after passing through a relay switch (fourth switch S4), is electrically connected to the CP output. The fourth switch S4 is controlled by a push-button switch on the charging gun casing and an internal control circuit.

[0087] Based on the above design, when charging the vehicle is required, regardless of whether the vehicle is in a state of complete battery depletion, the user only needs to connect the charging gun to a 220V power source and insert it into the charging port on the vehicle. Then, press the relay switch on the vehicle's charging panel and the charging gun. The charging gun will then provide 12V power to the vehicle through the CP terminal. At this time, the user can normally unlock and power on the vehicle. During this process, the user only needs to find a 220V power source, insert the charging gun, and press the switch. The 12V power supply line and ground wire are both secured and wrapped by the charging port, eliminating the risk of short circuits. This provides a safe and convenient charging function even when the vehicle is completely depleted, facilitating self-rescue in case of battery depletion. Furthermore, there is no need to develop a separate charging interface for scenarios where the entire vehicle is depleted. Instead, the vehicle's AC charging interface is reused, and corresponding circuitry is added to the charging gun and the vehicle interior to enable the user to charge the battery by inserting the charging gun. This function also works even when both the main battery and the power battery are simultaneously depleted. The operation is simple, avoiding potential risks from improper user operation. Users do not need to maintain the equipment; they only need to provide a 220V power supply during use.

[0088] Understandable Figure 1 The charging control system 10 shown is only a schematic diagram; the charging control system 10 may also include components such as... Figure 1 More components are shown. Figure 1 The components shown can be implemented using hardware, software, or a combination thereof. Those skilled in the art will readily understand that, for the sake of convenience and brevity, the specific working process of the charging control system 10 described above can be referred to the corresponding steps in the charging control method below, and will not be elaborated further here.

[0089] Second Embodiment

[0090] This application embodiment also provides a vehicle, which may include a vehicle body and the aforementioned charging control system 10. The vehicle-side circuitry of the charging control system 10 is deployed on the vehicle, while other circuitry in the charging control system 10, excluding the vehicle-side circuitry, can be deployed on a charging gun. This charging gun can serve as a vehicle-mounted charging gun. The vehicle possesses the functions of the aforementioned charging control system 10; the vehicle's charging process will not be described in detail here.

[0091] Third Embodiment

[0092] Please refer to Figure 2 This application also provides a charging control method, which can be applied to the charging control system 10 described above. The charging control method may include the following steps:

[0093] Step 210: When the first connector of the charging control system 10 is electrically connected to an external power source and the second connector of the charging control system 10 is electrically connected to the vehicle socket, the vehicle's power information is obtained.

[0094] Step 220: When the power information indicates that the vehicle's battery is in a depleted state and the vehicle is not unlocked, the second power supply line 12 and the third power supply line 13 of the charging control system 10 are turned on to charge the vehicle's battery through the external power source.

[0095] The steps of the charging control method will be explained in detail below:

[0096] In step 210, the charging control system 10 can detect the vehicle's battery level information through corresponding sensors on the vehicle. The battery level information may include, but is not limited to, the first remaining charge of the power battery and the second remaining charge of the storage battery.

[0097] In step 220, "battery in a discharged state" means: only the battery is discharged, while the power battery is not discharged; or both the battery and the power battery are discharged, i.e., the entire vehicle is discharged. The charging control system 10 can control the fourth switch S4 and the fifth switch S5 to close (or, the user can manually press the corresponding button switch to close the fourth switch S4 and the fifth switch S5), so that the second power supply line 12 and the third power supply line 13 are connected, thereby allowing the low-voltage electrical energy output by the transformer to charge the battery.

[0098] When the vehicle is in a state of complete battery depletion, all of the vehicle's low-voltage electrical components cannot operate. Therefore, without power, the vehicle cannot be unlocked and cannot be woken up. During battery charging, the user can unlock the vehicle to restore the operation of the vehicle's low-voltage electrical components, thereby waking up the vehicle.

[0099] In this embodiment, after step 210 or step 220, the method may further include:

[0100] When the battery information indicates that the vehicle is in a state of total vehicle power depletion and the vehicle has been unlocked, the second power supply line 12 and the third power supply line 13 of the charging control system 10 are turned on to charge the battery while the vehicle is in a wake-up state.

[0101] Understandably, when the vehicle is in a state of complete battery depletion and is not unlocked, after the user plugs in the charging gun, the vehicle is in a dormant state, performing low-voltage charging of the battery. After the low-voltage charging is completed, the charging control system 10 can automatically execute an OFF position AC charging to wake up the vehicle.

[0102] When the vehicle is in a state of complete battery depletion, during the low-voltage charging of the battery, the user can swipe a card to put the vehicle into the ON position, thus directly waking up the vehicle.

[0103] In this embodiment, when only the storage battery is in a depleted state and the power battery is not depleted, the storage battery can be powered by the second power supply line 12 and the third power supply line 13, and recharged by an external power source; or the power battery can recharge the storage battery. In this way, the charging control system 10 can be compatible with both methods of recharging the storage battery.

[0104] For example, after step 210 or step 220, the method may further include:

[0105] When the battery information indicates that the vehicle's storage battery is low, but the vehicle's power battery is not low, and the vehicle is unlocked, the DC-DC module in the vehicle is controlled to charge the storage battery.

[0106] In this embodiment, when the power battery has sufficient charge, it can charge the storage battery via a DC-DC converter. The DC-DC converter converts the high-voltage electricity from the power battery into low-voltage electricity to meet the charging needs of the storage battery.

[0107] In this embodiment, after step 210 or step 220, the method may further include:

[0108] When the battery charge rises to the preset charge level, the fifth switch S5 in the third power supply line 13 is opened, the first switch S1 is electrically connected to the trigger terminal in the power supply control module, and the first jump-start switch K1 and the second jump-start switch K2 on the first power supply line 11 are both closed to interrupt the charging of the battery by the third power supply line 13.

[0109] When the output current of the transformer is less than or equal to the preset current, the fourth switch S4 on the second power supply line 12 is opened, and the first switch S1 is electrically connected to the control terminal in the power supply control module so as to charge the vehicle's power battery through the first power supply line 11.

[0110] In this embodiment, once the battery charge reaches the corresponding threshold, there is no need to charge the battery using the second power supply line 12 and the third power supply line 13. Therefore, the first power supply line 11 and the third power supply line 13 can be disconnected. When the transformer's output current is less than or equal to the preset current, it indicates that the battery has exited the depleted state. At this time, the battery can meet the normal power supply needs of the vehicle's low-voltage electrical appliances for a certain period. Simultaneously, the second power supply line 12 can be interrupted, eliminating the need to charge the battery through it. At this point, the first power supply line 11 can be activated to charge the power battery, while the battery can be recharged by the power battery.

[0111] In this embodiment, the preset power level, preset current level, and other threshold values ​​can be flexibly determined according to the actual situation.

[0112] To facilitate understanding of the method's implementation process, the charging process will be illustrated below with an example:

[0113] Please refer to the reference. Figure 1 and Figure 3 Step 1: The user plugs the vehicle's AC charging gun into a 220V power grid socket, and then plugs the vehicle plug into the vehicle socket. At this time, switch S1 is connected to the PWM control terminal of the power supply control module, and switches S2, S3, S4, and S5 are all open. The whole vehicle is out of power and there is no action on the vehicle side.

[0114] Step 2: In the case of Step 1, the user presses the AC charging gun charging switch (S4). At this time, switch S4 is closed, switch S1 is forcibly connected to the +12V terminal (trigger terminal) of the power supply control module, and switches S2, S3 and S5 are all open. The whole vehicle is out of power and there is no action on the vehicle side.

[0115] Step 3: In step 2, press the charging switch (S5) on the vehicle charging plug. At this time, both switches S4 and S5 are closed, switch S1 is connected to the +12V terminal of the power supply control module, and switches S2 and S3 are open. The output terminal of the 12V transformer in the function box is connected to the positive terminal of the vehicle battery through the CP interface, and low voltage power is provided to the vehicle. At this time, the vehicle can be unlocked normally.

[0116] Step Four:

[0117] ① In step three, if the user does not swipe their card to unlock, the process proceeds to step one. At this time, the vehicle is in a dormant state. The vehicle's microcontroller unit (MCU) continuously monitors the battery level and the operating status of the onboard DC-DC module. When the battery level rises to a normal operating range or the onboard DC-DC module starts working and outputs low-voltage power, the MCU controls switch S5 to open (or the user can manually open it). At this time, switch S4 closes, switch S1 is connected to the +12V terminal of the power supply control module, and switches S2, S3, and S5 are open. The power supply control module detects that the current output by the 12V transformer is less than 50mA, and after switch S4 is closed, it controls S4 to open. At this time, switch S1 is connected to the +12V terminal, and switches S2, S3, S4, and S5 are all open. The AC charging CP signal control is restored, switch S1 automatically switches to the PWM terminal, and the vehicle enters AC charging mode, i.e., the onboard charger charges the power battery.

[0118] ② In step three, if the user unlocks the vehicle by swiping their card and the vehicle's power battery is low on power, then process two begins. At this point, the vehicle is in the ON unlocked state, but because the power battery is low on power and not connected to high voltage, the microcontroller continuously monitors the battery charge and the onboard DC-DC converter's operating status. When the battery charge rises to a normal operating range, or the onboard DC-DC converter starts working and outputs low-voltage power to supply the vehicle's low-voltage electrical appliances, the microcontroller controls switch S5 to open (or the user can manually disconnect it). At this time, switch S4 closes, switch S1 is connected to the +12V terminal, and switches S2, S3, and S5 are open, resetting the vehicle's charging socket jump-start switch. The charging gun power supply control device detects that the 12V transformer output current is less than 50mA and S4 is closed, then controls S4 to open. At this time, switch S1 is connected to the +12V terminal, and switches S2, S3, S4, and S5 are open, restoring the AC charging CP signal control, and the vehicle enters AC charging mode, meaning the onboard charger charges the power battery.

[0119] ③ In step three, if the user unlocks the vehicle by swiping their card and the vehicle's power battery has power, then process three begins. At this time, the vehicle is in the ON position and enters a high-voltage state. The DC-DC module starts working and provides low-voltage power to the vehicle. The microcontroller continuously monitors the battery charge and the onboard DC-DC's operating status. When the battery charge rises to a normal operating range or the onboard DC-DC starts working and outputs low-voltage power, the microcontroller controls S5 to disconnect (or the user can manually disconnect it). At this time, S4 closes, S1 is connected to the +12V terminal, and S2, S3, and S5 are open. The charging gun power supply control device detects that the 12V transformer output current is less than 50mA and S4 is closed, then controls S4 to disconnect. At this time, S1 is connected to the +12V terminal, and S2, S3, S4, and S5 are open. The AC charging CP signal control is restored, and switch S1 automatically switches to the PWM terminal. The vehicle enters AC charging mode, that is, the onboard charger charges the power battery.

[0120] In this embodiment, the vehicle control module and the power supply control module may include a processor. This processor can be an integrated circuit chip with signal processing capabilities. For example, the processor may be a central processing unit (CPU), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components, capable of implementing or executing the methods, steps, and logic block diagrams disclosed in the embodiments of this application.

[0121] The vehicle control module and power supply control module may also include a memory. This memory may be, but is not limited to, random access memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, etc. In this embodiment, the memory can be used to store voltage thresholds, current thresholds, etc., so that the corresponding control module can compare and analyze the detected voltage (or current) with the stored voltage thresholds (or current thresholds) and perform corresponding operations based on the analysis results. Of course, the memory can also be used to store programs, which the processor executes upon receiving an execution instruction.

[0122] Based on the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by hardware or by using software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solution of this application can be embodied in the form of a software product. The software product can be stored in a non-volatile storage medium (such as CD-ROM, USB flash drive, mobile hard drive, etc.) and includes several instructions to cause a computer device (such as a personal computer, server, or network device, etc.) to execute the methods of various implementation scenarios of this application.

[0123] In the embodiments provided in this application, it should be understood that the disclosed systems and methods can also be implemented in other ways. The system and method embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, program segment, or part of code, which includes one or more executable instructions for implementing a specified logical function. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions. Furthermore, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0124] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A charging control system, characterized in that, The system includes: The first connector is used for electrical connection to an external power source; A first power supply line electrically connected to the first connector, the first power supply line being used to charge the vehicle's power battery; The second power supply line and the power supply control module are electrically connected to the first connector. The second power supply line is equipped with a transformer, and the output end of the transformer is used to be electrically connected to the control guide CP terminal of the vehicle socket. The CP terminal of the vehicle socket is equipped with a third power supply line for charging the vehicle's battery. The vehicle-side circuit installed on the vehicle includes a vehicle control module, an on-board charger, and the third power supply line. The on-board charger is electrically connected to the first power supply line and is used to charge the power battery. The third power supply line includes a second diode and a fifth switch connected in series. The end of the second diode away from the fifth switch is electrically connected to the CP terminal of the vehicle socket. The end of the fifth switch away from the second diode is used to be electrically connected to the battery. The second diode is used to prevent the battery current from flowing out through the third power supply line. When the battery is depleted, the power supply control module controls the second power supply line to be connected to the third power supply line so as to charge the battery through the external power source. The system also includes peripheral circuitry for the power supply control module, the peripheral circuitry including a first switch and a first resistor; The power supply control module includes a first acquisition terminal, a trigger terminal, and a PWM control terminal. The first acquisition terminal is used to acquire the voltage of the CP terminal. The first switch can be selectively electrically connected to the trigger terminal and the PWM control terminal, and the first resistor is connected in series between the first switch and the CP terminal.

2. The charging control system according to claim 1, characterized in that, The first power supply line includes a live wire, a neutral wire, and a ground wire. The live wire is equipped with a first jumper switch, and the neutral wire is equipped with a second jumper switch. The output terminals of the live wire and the neutral wire are used to connect electrically to the on-board charger on the vehicle-side circuit. The on-board charger is used to charge the power battery. The vehicle-side circuit is located on the vehicle.

3. The charging control system according to claim 2, characterized in that, The system also includes a charging gun detection circuit, which includes a third switch, a fourth resistor connected in series, and a resistor-capacitor circuit. The end of the fourth resistor away from the resistor-capacitor circuit is electrically connected to the neutral wire. The end of the resistor-capacitor circuit away from the fourth resistor is used to electrically connect to the CC terminal of the vehicle socket for charging connection confirmation. The fourth resistor is connected in parallel with the third switch, which is closed or opened based on the plugging / unplugging state of the charging gun.

4. The charging control system according to claim 3, characterized in that, The CC terminal is used to electrically connect to the vehicle control module in the vehicle-side circuit. The vehicle control module is used to detect the plugging / unplugging status of the charging gun based on the switching status of the third switch.

5. The charging control system according to claim 1, characterized in that, The transformer is equipped with a fourth switch at its output terminal, which is used to control the on / off state of the second power supply line.

6. The charging control system according to claim 1, characterized in that, The vehicle control module includes a second acquisition terminal and a third acquisition terminal. The second acquisition terminal is electrically connected to the CP terminal of the vehicle socket through a first diode. The second acquisition terminal is also grounded through a second resistor and a third resistor connected in parallel. The second resistor is connected in series with a second switch. The third acquisition terminal is electrically connected to the CC terminal of the vehicle socket.

7. The charging control system according to any one of claims 1-6, characterized in that, The system also includes a leakage current protection module installed on the first power supply line and the second power supply line.

8. The charging control system according to any one of claims 1-6, characterized in that, The output end of the first power supply line and the output end of the transformer form a second connector, which is used for electrical connection with the vehicle socket.

9. A vehicle, characterized in that, Includes the vehicle body and the charging control system as described in any one of claims 1-8.

10. A charging control method, characterized in that, The method, applied to a charging control system as described in any one of claims 1-8, comprises: When the first connector of the charging control system is electrically connected to an external power source and the second connector of the charging control system is electrically connected to the vehicle socket, the vehicle's power information is obtained. When the power information indicates that the vehicle's battery is in a depleted state and the vehicle is not unlocked, the second and third power supply lines of the charging control system are activated to charge the battery through the external power source.

11. The method according to claim 10, characterized in that, The method further includes: When the power information indicates that the vehicle is in a state of total vehicle power depletion and the vehicle has been unlocked, the second and third power supply lines of the charging control system are turned on to charge the battery while the vehicle is in a wake-up state.

12. The method according to claim 10, characterized in that, The method further includes: When the power information indicates that the vehicle's battery is in a low-charge state, the vehicle's power battery is not in a low-charge state, and the vehicle is unlocked, the DC-DC module in the vehicle is controlled to charge the battery.

13. The method according to any one of claims 10-12, characterized in that, The method further includes: When the battery charge rises to a preset charge level, the fifth switch in the third power supply line is opened, the first switch is electrically connected to the trigger terminal in the power supply control module, and the first jump-start switch and the second jump-start switch on the first power supply line are both closed to interrupt the charging of the battery by the third power supply line. When the output current of the transformer is less than or equal to the preset current, the fourth switch on the second power supply line is controlled to open, and the first switch is controlled to be electrically connected to the control terminal in the power supply control module so as to charge the vehicle's power battery through the first power supply line.

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