Charging control system, vehicle and charging control method

Abstract

The invention provides a charging control system, a vehicle and a charging control method. The charging control system comprises a first connector used for being electrically connected with an external power source, a first power supply circuit electrically connected with the first connector, a second power supply circuit electrically connected with the first connector and a power supply control module. The first power supply circuit can charge a power battery of the vehicle, the second power supply circuit is provided with a transformer, the output end of the transformer is used for being electrically connected with a control guide CP end of a vehicle socket, and the CP end is provided with a third power supply circuit used for charging a storage battery of the vehicle; the power supply control module can control conduction of the second power supply line and the third power supply line so as to charge a storage battery of the vehicle through an external power supply. A charging interface does not need to be independently arranged for the storage battery, a user can insert a gun to charge the storage battery by multiplexing the existing charging interface of the vehicle, and the process of operating the vehicle to be charged by the user is simple.

Description

Technical Field

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

[0002] With the popularity of new energy vehicles, more and more OEMs are installing a large number of electronic control units and sensors to improve the user experience of vehicles. When the vehicle is unlocked, the vehicle's low-voltage power supply relies on the on-board DCDC (direct current-to-direct current) converter. When the vehicle is locked and dormant, the vehicle's low-voltage power supply relies on the battery. If the vehicle is parked for a long time without being used, the battery power will continue to decrease due to dark current.

[0003] When the power battery has power and the storage battery is low on power, the power battery usually charges the storage battery. For example, patent CN117734468A discloses an intelligent vehicle charging control method and system, which monitors the battery power to wake up the network in time and request high voltage on the high-voltage system, and then controls the operation of the on-board DCDC converter and outputs low-voltage electricity to charge the battery. Although the invention can realize the battery charging function, it uses a power battery as a charging power source, so that the solution will be limited by the power battery power. When the power battery power is lower than the threshold, the charging function will not be available. Under extreme conditions, there is still a situation where both the power battery and the storage battery are low on power.

[0004] When both the power battery and the storage battery of the vehicle are in a low-power state, it is necessary to charge the storage battery first, and then charge the power battery. In this case, the storage battery usually needs to be designed with a separate charging interface to cope with the battery charging when the whole vehicle is low-power. For example, patent CN115476818B sets a power supply port in a hidden place outside the vehicle body, and supplies power to the low-voltage circuit inside the vehicle through this port. This invention is powered by an external power supply, which gets rid of the limitation of the power of the power battery, but it needs to develop a non-standard interface outside the vehicle, and there is a risk of short circuit when the user operates it, and the power supply needs to be maintained. Therefore, when the whole vehicle is low-power, the vehicle has many charging interfaces and the charging process is more complicated. Summary of the invention

[0005] In view of this, the purpose of the embodiments of the present application is to provide a charging control system, a vehicle and a charging control method, which can improve the problem that the vehicle has multiple charging interfaces and a complicated charging process when the vehicle is low on power.

[0006] In order to achieve the above technical objectives, the technical solutions adopted in this application are as follows:

[0007] In a first aspect, an embodiment of the present application provides a charging control system, the charging control system comprising:

[0008] a first connector for electrically connecting to an external power source;

[0009] a first power supply circuit electrically connected to the first connector, the first power supply circuit being used to charge a power battery of the vehicle;

[0010] A second power supply circuit and a power supply control module electrically connected to the first connector, wherein the second power supply circuit is provided with a transformer, and the output end of the transformer is used to be electrically connected to the control guide CP end of the vehicle socket, and the CP end of the vehicle socket is provided with a third power supply circuit for charging the battery of the vehicle;

[0011] When the battery is low on power, the power supply control module is used to control the second power supply line to be connected to the third power supply line so as to charge the battery through the external power supply.

[0012] In combination with the first aspect, in some optional embodiments, the first power supply circuit includes a live wire, a neutral wire and a ground wire, the live wire is provided with a first jumper switch, the neutral wire is provided with a second jumper switch, the output ends of the live wire and the neutral wire are used to be electrically connected to an on-board charger on a vehicle-end circuit, the on-board charger is used to charge the power battery, and the vehicle-end circuit is arranged on the vehicle.

[0013] In combination with the first aspect, in some optional embodiments, the system also includes a gun insertion detection circuit, which includes a third switch, a fourth resistor in series and a resistor-capacitor circuit, wherein one end of the fourth resistor away from the resistor-capacitor circuit is electrically connected to the neutral line, and one end of the resistor-capacitor circuit away from the fourth resistor is used to be electrically connected to the charging connection confirmation CC terminal of the vehicle socket, the fourth resistor is connected in parallel with the third switch, and the third switch is closed or opened based on the plug-in status of the charging gun.

[0014] In combination with the first aspect, in some optional embodiments, the CC end is used to be electrically connected to a vehicle control module in a vehicle-end circuit, and the vehicle control module is used to detect the plug-in status of the charging gun based on the switching state of the third switch.

[0015] In combination with the first aspect, in some optional implementations, the system further includes a peripheral circuit of the power supply control module, and the peripheral circuit includes 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, wherein 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 combination with the first aspect, in some optional implementations, a fourth switch is provided at the output end of the transformer for controlling the on and off of the second power supply line.

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

[0020] A vehicle-side circuit provided on the vehicle, the vehicle-side circuit comprising 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, and the second acquisition terminal is also grounded through a second resistor and a third resistor connected in parallel, wherein 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 circuit includes a second diode and a fifth switch connected in series, wherein one end of the second diode away from the fifth switch is electrically connected to the CP end of the vehicle socket, and one end of the fifth switch away from the second diode is used to be electrically connected to the battery.

[0025] In combination with the first aspect, in some optional implementations, the system further includes a leakage protection module arranged on the first power supply line and the second power supply line.

[0026] In combination with the first aspect, in some optional implementations, the output end of the first power supply line and the output end of the transformer form a second connector, and the second connector is used to be electrically connected to the vehicle socket.

[0027] In a second aspect, an embodiment of the present application further provides a vehicle, comprising a vehicle body and the above-mentioned charging control system.

[0028] In a third aspect, an embodiment of the present application further provides a charging control method, which is applied to the above-mentioned charging control system, and the method includes:

[0029] When the first connector of the charging control system is electrically connected to the external power supply and the second connector of the charging control system is electrically connected to the vehicle socket, the power information of the vehicle is obtained;

[0030] When the power information indicates that the battery of the vehicle is in a low-power state and the vehicle is not unlocked, the second power supply circuit and the third power supply circuit of the charging control system are controlled to be turned on to charge the battery through the external power supply, wherein when the vehicle is in the low-power state, the first power supply circuit of the charging control system is in a disconnected state.

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

[0032] When the power information indicates that the vehicle is in a low-power state and the vehicle is unlocked, the second power supply circuit and the third power supply circuit of the charging control system are controlled to be turned on to charge the battery when the vehicle is in an awake state.

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

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

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

[0036] When the power of the storage battery rises to a preset power level, the fifth switch in the third power supply circuit is controlled to be disconnected, the first switch is controlled to be electrically connected to the trigger end in the power supply control module, and the first jumper switch and the second jumper switch on the first power supply circuit are controlled to be closed, so as to interrupt the third power supply circuit from charging the storage battery;

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

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

[0039] In the technical solution provided in the present application, the first power supply circuit in the charging control system can charge the power battery of the vehicle. The second power supply circuit is provided with a transformer, and the output end of the transformer is used to be electrically connected to the control guide CP end of the vehicle socket, and the CP end of the vehicle socket is provided with a third power supply circuit for charging the battery of the vehicle; when the whole vehicle is low on power, the first power supply circuit is in a disconnected state, and the power supply control module can control the second power supply circuit to be connected with the third power supply circuit, so that the battery can be charged when the battery is low on power and the whole vehicle is low on power. In this way, for the scenario where the whole vehicle is low on power, there is no need to set up a separate charging interface for the battery. By reusing the existing charging interface of the vehicle, the user can realize the charging operation of the battery by plugging in the gun, and the process of the user operating the vehicle charging is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The present application may be further described by the non-limiting embodiments given in the accompanying drawings. It should be understood that the following drawings only illustrate certain embodiments of the present application and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings may be obtained based on these drawings without creative effort.

[0041] Figure 1 A schematic diagram of the circuit principle of the charging control system provided in an embodiment of the present application.

[0042] Figure 2 A flow chart of a charging control method provided in an embodiment of the present application.

[0043] Figure 3 A schematic diagram of the charging process provided in an embodiment of the present application.

[0044] Icons: 10-charging control system; 11-first charging circuit; 12-second charging circuit; 13-third charging circuit; 14-gun insertion detection circuit; 15-CP detection circuit. DETAILED DESCRIPTION

[0045] The present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that in the drawings or descriptions, similar or identical parts use the same figure numbers, and the implementation methods not shown or described in the drawings are forms known to ordinary technicians in the relevant technical field. In the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0046] First embodiment

[0047] Please refer to Figure 1The present application provides a charging control system 10, which can be applied to a vehicle and can charge the vehicle battery when the vehicle is low on power.

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

[0049] If the first remaining power is lower than the corresponding power threshold, it means that the vehicle is in a high-voltage power-deficient state; if the second remaining power is lower than the corresponding power threshold, it means 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 threshold, it indicates that the vehicle is in a state of power shortage. The power threshold of the power battery is the critical value at which the power battery cannot normally supply power to the high-voltage circuit / high-voltage electrical appliances of the vehicle. The power threshold of the storage battery is the critical value at which the storage battery cannot normally supply power to the low-voltage circuit / low-voltage electrical appliances of the vehicle.

[0051] It should be noted that if the vehicle is in a low-battery state and the high-voltage low-battery state, it means that the vehicle is in a low-battery state. If the first remaining power and the second remaining power are both higher than the corresponding power threshold, it means that the internal power supply of the vehicle is not in a low-battery state.

[0052] When the vehicle is in a state of power shortage, the first power supply line 11 of the charging control system 10 is in a disconnected state. After the vehicle is in a state of power shortage, if the vehicle is not in a charging state, the vehicle is not in a dormant 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 a charging gun so that the charging gun can charge the vehicle battery when the whole vehicle is in a power-deficient state. The charging gun can be, but is not limited to, a household charging gun or a commercial charging gun (such as a charging gun for a commercial charging pile).

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

[0055] In this embodiment, the first power supply line 11 can be used to charge the power battery of the vehicle. The first power supply line 11 is provided with a jumper switch for controlling the conduction and disconnection 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), and the first connector may include pins 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 provided with a first jumper switch K1, and the neutral wire is provided with a second jumper switch K2. The output ends of the live wire and the neutral wire can be electrically connected to the on-board charger on the vehicle-side circuit, and the on-board charger is used to charge the power battery. The vehicle-side circuit is deployed on the vehicle.

[0058] The on-board charger is installed on the vehicle and can charge the vehicle's power battery. The on-board charger can dynamically adjust the charging current or voltage parameters based on the data provided by the battery management system (BMS) on the vehicle (such as battery temperature, remaining battery power, etc.), perform corresponding actions, and 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 charged normally (not the whole vehicle is out of power), the first jumper switch K1 and the second jumper switch K2 are closed, the first power supply line 11 is turned on, and the second power supply line 12 and the third power supply line 13 are in a disconnected state. At this time, the on-board charger is running and can charge the power battery of the vehicle. Among them, the on-board charger can convert alternating current (AC) into direct current (DC) for charging the power battery.

[0060] For example, the on-board charger receives AC power from an external power source, which may be 220 volts (V) from a household socket or 380V for industrial use; then, the AC power is converted to DC power through a high-frequency switching power supply (usually using a DC / DC converter topology such as a full-bridge or half-bridge). In this process, the transformer and power semiconductor devices (such as IGBT or MOSFET, etc.) in the power circuit play a core role, which can realize functions such as voltage conversion, AC to DC conversion, and frequency conversion.

[0061] In this embodiment, the second power supply line 12 is provided with a transformer, and the output end of the transformer is used to be electrically connected to the CP (Control Pilot) end of the vehicle socket. The CP end of the vehicle socket is provided with a third power supply line 13 for charging the battery of the vehicle. The battery of the vehicle is used to power the low-voltage electrical system of the vehicle, for example, after the vehicle is turned off, it can power the driving recorder on the vehicle.

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

[0063] In this embodiment, the charging control system 10 may further include a charging gun plug detection circuit 14. The charging gun plug detection circuit 14 includes a third switch S3, a fourth resistor R4 connected in series, and a resistor-capacitor (RC) circuit, wherein one end of the fourth resistor R4 away from the resistor-capacitor circuit is electrically connected to the neutral line, and one end of the resistor-capacitor circuit away from the fourth resistor R4 is used to be electrically connected to the CC (Connection Confirm) end of the vehicle socket, and the fourth resistor R4 is connected in parallel with the third switch S3. The third switch S3 is closed or opened based on the plug-in state of the charging gun.

[0064] The CC terminal is used to be electrically connected to the vehicle control module in the vehicle-side circuit. The vehicle control module can detect the plug-in and unplug status of the charging gun based on the voltage change of the CC terminal caused by the switching state of the third switch S3.

[0065] For example, when the user is charging with a charging gun, the third switch S3 can be disconnected due to the action of plugging the gun, and can be closed due to the action of pulling the gun out. When the third switch S3 is closed (i.e., the charging gun is pulled out), the fourth resistor R4 is short-circuited; when the third switch S3 is disconnected (i.e., the charging gun is inserted), the fourth resistor R4 is put into use normally. In the closed and disconnected states of the third switch S3, there is a difference in resistance between the CC terminal and the PE terminal. In this way, the vehicle control module can detect whether the connection of the charging gun is abnormal by detecting the resistance values ​​of the CC terminal and the PE terminal.

[0066] Please refer again Figure 1 The output end of the live wire, the output end of the neutral wire, the output end of the ground wire, the CC end and the CP end can form a vehicle plug, which matches the vehicle socket deployed on the vehicle, that is, the vehicle plug can be plugged into the vehicle socket.

[0067] The charging control system 10 may further include a peripheral circuit of a power supply control module, and the peripheral circuit 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 control the charging power of the battery through the PWM terminal through the voltage of the CP terminal acquired by the first acquisition terminal.

[0069] Please refer again Figure 1, the first switch S1 can be selectively electrically connected to the trigger end and the PWM control end, and the first resistor R1 is connected in series between the first switch S1 and the CP end. Among them, 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 a CP detection circuit 15. The CP detection circuit 15 can send the charging current size to the on-board charger through the PWM control signal, so that the on-board charger can dynamically adjust the charging power to charge the power battery. The on-board charger can send a request for charging to the power supply control module at the charging gun end by controlling the closing / opening of the second switch S2, wherein the second switch S2 is closed, indicating a request for charging; the second switch S2 is opened, indicating the end of charging. The power supply control module has a difference in the voltage collected at the detection point 1 based on the opening and closing of the second switch S2. The power supply control module can identify whether the vehicle has a charging request based on the voltage change collected at the detection point 1, thereby controlling the opening and closing of the jumper switches K1 and K2. That is, when the second switch S2 is disconnected, it means that there is no high-voltage charging demand, and the power battery cannot be charged.

[0070] During the period of charging the battery of the vehicle using the second power supply line 12 and the third power supply line 13, the CP detection circuit 15 does not have a conventional function (i.e., it cannot trigger the on-board charger to charge the power battery). In addition, during the charging period, if the battery power rises to the corresponding threshold, or is fully charged, the vehicle end (such as 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. At the same time, the current at the CP end enters the vehicle body ground via the first diode D1 and the third resistor R3 (the resistance of the third resistor R3 is relatively large and much larger than the resistance of the second resistor R2). Due to the large resistance of the third resistor R3, the current at the detection point 1 will be converted from a relatively large current to a relatively small current (the relatively small current is usually tens of milliamperes) before and after the fifth switch S5 is disconnected. At the same time, the charging gun end (such as the power supply control module) controls the fourth switch S4 to be disconnected. At this time, the CP detection circuit 15 can restore the conventional function (i.e., it has the function of the 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 may be a single-pole multi-throw switch (eg, a single-pole double-throw switch).

[0072] The output end of the transformer is provided with a fourth switch S4 for controlling the on and off of the second power supply line 12. The fourth switch S4 may be a button switch on the charging gun, which may be manually triggered or triggered by a power supply control module.

[0073] The charging control system 10 may further include a vehicle-side circuit disposed on the vehicle. The vehicle-side circuit 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, and 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 current from flowing back / backward to improve the safety of the circuit.

[0075] The second resistor R2 is connected in series with the second switch S2. The closing and opening of the second switch S2 can cause the voltage at the CP terminal to change, 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 that there is a slow charging request and a slow charging operation needs to be performed; when the second switch S2 is opened, the second resistor R2 is not connected to the circuit, indicating that there is no slow charging request and the slow charging operation needs to be interrupted.

[0076] Please refer again Figure 1 The third acquisition terminal is electrically connected to the CC terminal of the vehicle socket, and 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. One end of the second diode D2 away from the fifth switch S5 is electrically connected to the CP end of the vehicle socket. One 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 cooperate with the fourth switch S4 to realize the switch control of battery charging. When the charging gun is correctly connected to the external power supply and the vehicle, and the fourth switch S4 and the fifth switch S5 are both closed, the battery of the vehicle can be charged. If either the fourth switch S4 or the fifth switch S5 is disconnected, the battery charging will be disconnected.

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

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

[0081] The core working principle of the leakage protection module (also called leakage protector) is to identify leakage by detecting the current balance state in the circuit. Under normal circumstances, the power circuit of the charging control system 10 is closed, and the current passes from the power supply through the device and then returns to the power supply to form a loop. In this closed loop, the current in and out is balanced, that is, the current flowing in is equal to the current flowing out. However, when electrical equipment has a leakage phenomenon, part of the current will escape to the ground or other media through insulation failure or the housing of the electrical equipment, thereby breaking the original current balance. The leakage protector uses the principle of current balance. When it detects an imbalance in the current in and out, it quickly cuts off the power supply to achieve the purpose of protection.

[0082] For example, when the leakage protection module detects leakage, the fourth switch S4, the first jumper switch K1 and the second jumper switch K2 may be controlled to be in an open state.

[0083] Please refer 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), and the second connector is used to be electrically connected to the vehicle socket.

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

[0085] Compared with the existing charging system, the present application connects a low-voltage power supply line (third power supply line 13) in parallel at the CP input end of the vehicle-side charging port to the positive electrode of the battery. A relay switch (fifth switch S5) is connected to this power supply line, and the relay switch can be closed or opened by the push-button switch on the charging port panel outside the vehicle and the control circuit inside the vehicle.

[0086] In addition, at the end of the charging gun, a 220V to 12V transformer is added inside the charging gun, and the output end is electrically connected to the CP output end after passing through the relay switch (the fourth switch S4). The fourth switch S4 is controlled by the button switch on the charging gun housing and the internal control circuit.

[0087] Based on the above design, when the vehicle needs to be charged, regardless of whether the vehicle is in a state of power loss, the user only needs to connect the charging gun that comes with the vehicle to a 220V power supply and insert it into the charging port on the vehicle end, and then press the vehicle charging panel and the relay switch on the charging gun. The charging gun can provide 12V power to the vehicle through the CP end. At this time, the user can normally unlock and power on the user. In this process, the user only needs to find a 220V power supply, plug the gun and press the switch. The 12V power supply line and the ground wire are fixed and wrapped by the charging port, and there is no risk of short circuit. It can provide users with safe and convenient charging functions when the vehicle is running low on power, and facilitate self-rescue when the vehicle is running low on power. In addition, there is no need to develop a separate charging interface for the scenario of power loss of the whole vehicle. Instead, the AC charging interface of the vehicle body is reused, and the corresponding circuit is added to the charging gun and the vehicle, so that the user can plug the gun to charge the battery, and it can work even when the battery and the power battery are running low on power at the same time. It is easy to operate and avoids the risks that may exist due to improper operation by the user. The user does not need to maintain the equipment at ordinary times, and only needs to provide 220V power supply when using it.

[0088] Understandably, Figure 1 The charging control system 10 shown in FIG. 1 is only a schematic diagram of a structure. The charging control system 10 may also include Figure 1 More components are shown. Figure 1 The components shown in the figure can be implemented by hardware, software or a combination thereof. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the charging control system 10 described above can refer to the corresponding process of each step in the following charging control method, and will not be described in detail here.

[0089] Second embodiment

[0090] The embodiment of the present application also provides a vehicle, which may include a vehicle body and the above-mentioned charging control system 10, wherein the vehicle-side circuit in the charging control system 10 is deployed on the vehicle, and other circuits in the charging control system 10 except the vehicle-side circuit can be deployed on the charging gun. The charging gun can be used as a vehicle-mounted charging gun. The vehicle has the functions of the above-mentioned charging control system 10, and the charging process of the vehicle is not repeated here.

[0091] Third embodiment

[0092] Please refer to Figure 2 The present application also provides a charging control method, which can be applied to the above-mentioned charging control system 10. 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 the external power supply and the second connector of the charging control system 10 is electrically connected to the vehicle socket, the power information of the vehicle is obtained;

[0094] Step 220, when the power information indicates that the battery of the vehicle is in a low-power 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 controlled to be turned on to charge the battery of the vehicle through the external power supply.

[0095] The following will describe the various steps of the charging control method in detail as follows:

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

[0097] In step 220, the battery is in a low-power state, which means that only the battery is in a low-power state, and the power battery is not low-power; or both the battery and the power battery are in a low-power state, that is, the whole vehicle is low-power. The charging control system 10 can control the fourth switch S4 and the fifth switch S5 to close (or the user manually presses the corresponding button switch to close the fourth switch S4 and the fifth switch S5) to connect the second power supply line 12 and the third power supply line 13, so that the low-voltage power output by the transformer charges the battery.

[0098] When the vehicle is out of power, the vehicle's low-voltage electrical appliances cannot operate. Therefore, if there is no power supply and the vehicle is not unlocked, the vehicle cannot be awakened. During the battery charging period, the user can unlock the vehicle to resume the operation of the vehicle's low-voltage electrical appliances, thereby waking up the vehicle.

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

[0100] When the power information indicates that the vehicle is in a low-power state and the vehicle is unlocked, the second power supply line 12 and the third power supply line 13 of the charging control system 10 are controlled to be turned on to charge the battery when the vehicle is in an awake state.

[0101] Understandably, when the vehicle is in a low-power state and the vehicle is not unlocked, after the user plugs in the gun, the vehicle is in a dormant state to charge the battery at a low voltage. After the low-voltage charging is completed, the charging control system 10 can automatically perform an OFF gear AC charging to wake up the vehicle.

[0102] When the vehicle is low on power and the battery is being recharged at low voltage, the user can swipe the card to turn the vehicle into the ON position, thus waking up the vehicle directly.

[0103] In this embodiment, when only the storage battery is in a power-deficient state and the power battery is not in a power-deficient state, the storage battery can be connected by the second power supply line 12 and the third power supply line 13 and supplemented by an external power source; or the power battery can supplement the storage battery. In this way, the charging control system 10 can be compatible with two ways to supplement the storage battery.

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

[0105] When the power information indicates that the battery of the vehicle is in a low-power state, the power battery of the vehicle is not in a low-power state, and the vehicle is unlocked, the DCDC module in the vehicle is controlled to charge the battery.

[0106] In this embodiment, when the power battery has sufficient power, the power battery can charge the storage battery through the DCDC module. The DCDC module is used to convert the high voltage power of the power battery into low voltage power to meet the charging demand of the storage battery.

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

[0108] When the power of the battery rises to a preset power level, the fifth switch S5 in the third power supply line 13 is controlled to be disconnected, the first switch S1 is controlled to be electrically connected to the trigger end in the power supply control module, and the first jumper switch K1 and the second jumper switch K2 on the first power supply line 11 are controlled to be closed, so as to interrupt the third power supply line 13 from charging the battery;

[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 controlled to be disconnected, and the first switch S1 is controlled to be electrically connected to the control end in the power supply control module to charge the power battery of the vehicle through the first power supply line 11.

[0110] In this embodiment, after the battery power reaches the corresponding threshold power, it is not necessary to use the second power supply line 12 and the third power supply line 13 to charge the battery, so the first power supply line 11 and the third power supply line 13 can be disconnected. When the output current of the transformer is less than or equal to the preset current, it means that the battery has left the low-power state. At this time, the battery can meet the normal power supply of the low-voltage electrical appliances of the vehicle for a certain period of time. At the same time, the second power supply line 12 can be interrupted, and there is no need to charge the battery through the second power supply line 12. At this time, the first power supply line 11 can be opened to charge the power battery, and the battery can be supplemented by the power battery.

[0111] In this embodiment, threshold values ​​such as preset power and preset current can be flexibly determined according to actual conditions.

[0112] To facilitate understanding of the implementation process of the method, the following example will illustrate the charging process as follows:

[0113] Please refer to Figure 1 and Figure 3 , Step 1: The user inserts the vehicle AC charging gun into the socket of the 220V power grid, and then inserts the vehicle plug into the vehicle socket. At this time, switch S1 is connected to the PWM control end 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 end.

[0114] Step 2: In the case of step 1, the user presses the charging switch (S4) of the AC charging gun. At this time, switch S4 is closed, and switch S1 is forced to connect to the +12V end (trigger end) of the power supply control module. Switches S2, S3, and S5 are all open, the entire vehicle is out of power, and the vehicle end does not take any action.

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

[0116] Step 4:

[0117] ① In the case of step 3, if the user does not swipe the card to unlock, the process will enter the first process. At this time, the whole vehicle is in a dormant state. The vehicle's microcontroller unit continues to detect the battery power and the working status of the on-board DCDC module. When the battery power rises to the normal working range or the on-board DCDC starts to work and outputs low-voltage electricity, the microcontroller unit (MCU) controls the switch S5 to disconnect (it can also be disconnected manually by the user). At this time, switch S4 is closed, switch S1 is connected to the +12V end 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 disconnect. At this time, switch S1 is connected to the +12V end, switches S2, S3, S4, and S5 are all open, the AC charging CP signal control is restored, and switch S1 automatically jumps to the PWM end. The whole vehicle enters the AC charging state, that is, the on-board charger charges the power battery.

[0118] ② In the case of step 3, if the user swipes the card to unlock the vehicle, and the vehicle power battery is low, then enter process 2. At this time, the vehicle is in the ON gear unlocking state, but because the power battery is low and the high voltage is not applied, the micro control unit continues to detect the battery power and the working state of the vehicle-mounted DCDC. When the battery power rises to the normal working range, or the vehicle-mounted DCDC starts to work and outputs low-voltage electricity to power the vehicle's low-voltage electrical appliances, the micro control unit controls switch S5 to disconnect (it can also be manually disconnected by the user). At this time, switch S4 is closed, switch S1 is connected to the +12V terminal, switches S2, S3, S5 are open, and the vehicle charging socket jumper switch is reset. After the charging gun power supply control device detects that the output current of the 12V transformer is less than 50mA and S4 is closed, it controls S4 to disconnect. At this time, switch S1 is connected to the +12V terminal, switches S2, S3, S4, S5 are open, the AC charging CP signal control is restored, and the vehicle enters the AC charging state, that is, the vehicle-mounted charger charges the power battery.

[0119] ③ In the case of step three, if the user swipes the card to unlock the vehicle, and the vehicle power battery has power, then enter process three. At this time, the vehicle is unlocked in the ON gear and enters the high-voltage state. The DCDC module starts to work and provides low-voltage power supply for the vehicle. The microcontroller unit continuously detects the battery power and the working state of the on-board DCDC. When the battery power rises to the normal working range or the on-board DCDC starts to work and outputs low-voltage electricity. The microcontroller unit controls S5 to disconnect (it can also be disconnected manually by the user). At this time, S4 is closed, S1 is connected to the +12V terminal, and S2, S3, and S5 are open. After the charging gun power supply control device detects that the output current of the 12V transformer is less than 50mA and S4 is closed, it controls S4 to disconnect. At this time, S1 is connected to the +12V terminal, S2, S3, S4, and S5 are open, the AC charging CP signal control is restored, and the switch S1 automatically jumps to the PWM terminal. The vehicle enters the AC charging state, that is, the on-board charger charges the power battery.

[0120] In this embodiment, the vehicle control module and the power supply control module may include a processor. The processor may be an integrated circuit chip having 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 gates or transistor logic devices, discrete hardware components, and may implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application.

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

[0122] Through the description of the above implementation methods, technical personnel in this field can clearly understand that the present application can be implemented through hardware, and can also be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of various implementation scenarios of the present application.

[0123] In the embodiments provided in the present application, it should be understood that the disclosed system and method can also be implemented in other ways. The system and method embodiments described above are merely schematic, for example, the flow charts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the systems, methods and computer program products according to the multiple embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a part of a module, a program segment or a code, and a part of a module, a program segment or a code includes one or more executable instructions for implementing the specified logical function. It should also be noted that each box in the block diagram and / or the flow chart, and the combination of the boxes in the block diagram and / or the flow chart can be implemented by a dedicated hardware-based system that performs the specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions. In addition, each functional module in each embodiment of the present application can be integrated together to form an independent part, or each module can exist separately, or two or more modules can be integrated to form an independent part.

[0124] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A charging control system, characterized in that: The system comprises: a first connector for electrically connecting to an external power source; a first power supply circuit electrically connected to the first connector, the first power supply circuit being used to charge a power battery of the vehicle; A second power supply circuit and a power supply control module electrically connected to the first connector, wherein the second power supply circuit is provided with a transformer, and the output end of the transformer is used to be electrically connected to the control guide CP end of the vehicle socket, and the CP end of the vehicle socket is provided with a third power supply circuit for charging the battery of the vehicle; When the battery is low on power, the power supply control module is used to control the second power supply line to be connected to the third power supply line so as to charge the battery through the external power supply.

2. The charging control system according to claim 1, characterized in that: The first power supply circuit includes a live wire, a neutral wire and a ground wire. The live wire is provided with a first jumper switch, and the neutral wire is provided with a second jumper switch. The output ends of the live wire and the neutral wire are used to be electrically connected to an on-board charger on a vehicle-end circuit. The on-board charger is used to charge the power battery. The vehicle-end circuit is arranged on the vehicle.

3. The charging control system according to claim 2, characterized in that: The system also includes a gun insertion detection circuit, which includes a third switch, a fourth resistor in series and a resistor-capacitor circuit, wherein one end of the fourth resistor away from the resistor-capacitor circuit is electrically connected to the neutral line, and one end of the resistor-capacitor circuit away from the fourth resistor is used to be electrically connected to the charging connection confirmation CC terminal of the vehicle socket, the fourth resistor is connected in parallel with the third switch, and the third switch is closed or opened based on the plug-in status of the charging gun.

4. The charging control system according to claim 3, characterized in that: The CC terminal is used to be electrically connected to a vehicle control module in a vehicle-side circuit, and the vehicle control module is used to detect the plug-in and unplug-out status of the charging gun based on the switch state of the third switch.

5. The charging control system according to claim 1, characterized in that: The system further includes a peripheral circuit of the power supply control module, wherein the peripheral circuit includes 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, wherein 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.

6. The charging control system according to claim 1, characterized in that: A fourth switch is provided at the output end of the transformer for controlling the on and off of the second power supply line.

7. The charging control system according to claim 1, characterized in that: The system further comprises: A vehicle-side circuit provided on the vehicle, the vehicle-side circuit comprising 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 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, and the second acquisition terminal is also grounded through a second resistor and a third resistor connected in parallel, wherein 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; The third power supply circuit includes a second diode and a fifth switch connected in series, wherein one end of the second diode away from the fifth switch is electrically connected to the CP end of the vehicle socket, and one end of the fifth switch away from the second diode is used to be electrically connected to the battery.

8. The charging control system according to any one of claims 1 to 7, characterized in that: The system further includes a leakage protection module arranged on the first power supply line and the second power supply line.

9. The charging control system according to any one of claims 1 to 7, characterized in that: The output end of the first power supply line and the output end of the transformer form a second connector, and the second connector is used to be electrically connected to the vehicle socket.

10. A vehicle, characterized in that: It comprises a vehicle body and a charging control system as described in any one of claims 1-9.

11. A charging control method, characterized in that: Applied to a charging control system according to any one of claims 1 to 9, the method comprising: When the first connector of the charging control system is electrically connected to the external power supply and the second connector of the charging control system is electrically connected to the vehicle socket, the power information of the vehicle is obtained; When the power information indicates that the battery of the vehicle is in a low-power state and the vehicle is not unlocked, the second power supply line and the third power supply line of the charging control system are controlled to be turned on to charge the battery through the external power supply.

12. The method according to claim 11, characterized in that The method further comprises: When the power information indicates that the vehicle is in a low-power state and the vehicle is unlocked, the second power supply circuit and the third power supply circuit of the charging control system are controlled to be turned on to charge the battery when the vehicle is in an awake state.

13. The method according to claim 11, characterized in that The method further comprises: When the power information indicates that the battery of the vehicle is in a low-power state, the power battery of the vehicle is not in a low-power state, and the vehicle is unlocked, the DCDC module in the vehicle is controlled to charge the battery.

14. The method according to any one of claims 11 to 13, characterized in that The method further comprises: When the power of the storage battery rises to a preset power level, the fifth switch in the third power supply circuit is controlled to be disconnected, the first switch is controlled to be electrically connected to the trigger end in the power supply control module, and the first jumper switch and the second jumper switch on the first power supply circuit are controlled to be closed, so as to interrupt the third power supply circuit from charging the storage battery; When the output current of the transformer is less than or equal to a preset current, the fourth switch on the second power supply line is controlled to be disconnected, and the first switch is controlled to be electrically connected to the control end in the power supply control module to charge the power battery of the vehicle through the first power supply line.

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