Electric vehicle charging control method and system and electric vehicle

Abstract

The invention provides an electric vehicle charging control method and system and an electric vehicle, and relates to the technical field of electric vehicles. The vehicle control unit determines that P1 + P2gt is satisfied; pgt; p1gt; under the condition of P2, the charging power capable of being provided by the charging pile is less than the required charging power of the vehicle-mounted battery, and the sum of the charging power capable of being provided by the charging pile and the charging power capable of being provided by the wireless charging module is greater than the required charging power of the vehicle-mounted battery. Therefore, the battery management module is notified to control the switching assembly to be in the first connection state, so that the quick charging loop and the wireless charging loop are conducted. The vehicle control unit controls the charging pile to output the charging power, charges the vehicle-mounted battery through the fast charging loop and controls the wireless charging module to charge the vehicle-mounted battery with the difference power between the required charging power and the output charging power of the charging pile, the charging efficiency is high, and electric energy waste is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicles, and particularly relates to an electric vehicle charging control method and system and an electric vehicle. BACKGROUND

[0002] An electric vehicle refers to a vehicle that uses a vehicle-mounted battery as power and uses an electric motor to drive wheels to travel. Generally, when the vehicle-mounted battery of an electric vehicle is insufficient, the vehicle-mounted battery of the electric vehicle needs to be charged.

[0003] At present, one of the main ways for vehicle-mounted charging is to use a charging pile to charge a vehicle. However, the charging pile usually includes multiple charging guns, and when the charging pile simultaneously charges different electric vehicles using multiple charging piles, the charging power allocated to a single vehicle is small, resulting in low charging efficiency of a single electric vehicle. SUMMARY

[0004] The present application provides an electric vehicle charging control method and system and an electric vehicle, which are used to solve the problem of low charging efficiency of a single electric vehicle when the charging pile simultaneously charges different electric vehicles using multiple charging piles in the prior art.

[0005] In a first aspect, the present application provides an electric vehicle charging control method applied to an electric vehicle charging control system. The system includes a vehicle controller, a battery management module, a vehicle-mounted battery, a fast charging circuit, a wireless charging circuit, and a switching component. The vehicle controller, the battery management module, and the vehicle-mounted battery are electrically connected in sequence. The fast charging circuit and the wireless charging circuit are electrically connected with the vehicle-mounted battery, respectively. The switching component is electrically connected with the battery management module, the fast charging circuit, and the wireless charging circuit, respectively. The method provided by the present application includes the following steps:

[0006] The vehicle controller determines the required charging power of the vehicle-mounted battery, the output charging power of the charging pile connected with the fast charging circuit, and the rated charging power of the wireless charging module connected with the wireless charging circuit.

[0007] When it is determined that P1+P2>P>P1>P2 is met, the vehicle controller notifies the battery management module to control the switching component to be in a first connection state, so as to make the fast charging circuit and the wireless charging circuit conductive, where P is the required charging power of the vehicle-mounted battery, P1 is the output charging power of the charging pile, and P2 is the rated charging power of the wireless charging module.

[0008] The vehicle controller controls the charging pile to output the charging power and charges the vehicle-mounted battery through the fast charging circuit, and controls the wireless charging module to charge the vehicle-mounted battery with the difference power between the required charging power and the output charging power of the charging pile.

[0009] In some embodiments, after the vehicle controller determines the required charging power of the vehicle battery, the output charging power of the charging pile connected to the fast charging circuit, and the rated charging power of the wireless charging module connected to the wireless charging circuit, the method provided by the application further comprises:

[0010] The vehicle controller determines that P1>P>P2 is satisfied, and notifies the battery management module to control the switching assembly to be in the second connection state, so that the fast charging circuit is turned on and the wireless charging circuit is turned off.

[0011] The vehicle controller controls the charging pile to charge the vehicle battery at the required charging power of the vehicle battery.

[0012] In some embodiments, after the vehicle controller determines the required charging power of the vehicle battery, the output charging power of the charging pile connected to the fast charging circuit, and the rated charging power of the wireless charging module connected to the wireless charging circuit, the method provided by the application further comprises:

[0013] The vehicle controller determines that P1>P>P2 is satisfied, and notifies the battery management module to control the switching assembly to be in the first connection state, so that the fast charging circuit is turned on and the wireless charging circuit is turned on.

[0014] The vehicle controller controls the wireless charging module to charge the vehicle battery through the wireless charging circuit at the rated charging power, and controls the charging pile to charge the vehicle battery at the difference between the required charging power and the rated charging power of the vehicle battery.

[0015] In some embodiments, after the vehicle controller determines the required charging power of the vehicle battery, the output charging power of the charging pile connected to the fast charging circuit, and the rated charging power of the wireless charging module connected to the wireless charging circuit, the method provided by the application further comprises:

[0016] The vehicle controller determines that P1>P>P2 is satisfied, and notifies the battery management module to control the switching assembly to be in the first connection state, so that the fast charging circuit is turned on and the wireless charging circuit is turned on.

[0017] In some embodiments, after the vehicle controller determines the required charging power of the vehicle battery, the output charging power of the charging pile connected to the fast charging circuit, and the rated charging power of the wireless charging module connected to the wireless charging circuit, the method provided by the application further comprises:

[0018] The vehicle controller determines that P1>P>P2 is satisfied, and notifies the battery management module to control the switching assembly to be in the first connection state, so that the fast charging circuit is turned on and the wireless charging circuit is turned on.

[0019] In some embodiments, after the vehicle controller determines the required charging power of the vehicle battery, the output charging power of the charging pile connected to the fast charging circuit, and the rated charging power of the wireless charging module connected to the wireless charging circuit, the method provided by the application further comprises:

[0020] The vehicle controller determines that P1>P>P2, and informs the battery management module to control the switching assembly to switch from the second connection state to the first connection state, so that the fast charging circuit is turned on and the wireless charging circuit is turned on;

[0021] The vehicle controller controls the wireless charging module to charge the vehicle battery through the wireless charging circuit at the rated charging power, and controls the charging pile to charge the vehicle battery at the difference between the required charging power of the vehicle battery and the rated charging power.

[0022] In some embodiments, after the vehicle controller determines the required charging power of the vehicle battery, the output charging power of the charging pile connected to the fast charging circuit, and the rated charging power of the wireless charging module connected to the wireless charging circuit, the method provided by the application further comprises:

[0023] The vehicle controller determines that P<P2<P1, and informs the battery management module to obtain the remaining power of the vehicle battery from the battery management module;

[0024] When the remaining power is higher than the set power threshold, the control switching assembly is controlled to be in the second connection state to make the fast charging circuit conductive and the wireless charging circuit disconnected, and the charging pile is controlled to charge the vehicle battery at the required charging power;

[0025] Or when the remaining power is higher than the set power threshold, the battery management module is informed to control the control switching assembly to be in the third connection state to make the fast charging circuit disconnected and the wireless charging circuit conductive, and the wireless charging module is controlled to charge the vehicle battery at the required charging power.

[0026] In some embodiments, the method provided by the application further comprises:

[0027] The vehicle controller determines that P>P1+P2, and informs the battery management module to control the switching assembly to be in the first connection state to make the fast charging circuit conductive and the wireless charging circuit conductive;

[0028] The vehicle controller controls the charging pile to output the charging power to charge the vehicle battery through the fast charging circuit, and controls the wireless charging module to charge the vehicle battery at the rated charging power.

[0029] In some embodiments, after the vehicle controller controls the charging pile to output the charging power to charge the vehicle battery through the fast charging circuit, and controls the wireless charging module to charge the vehicle battery at the difference between the required charging power and the output charging power of the charging pile, the method provided by the application further comprises:

[0030] The vehicle controller obtains the charging current of the vehicle battery, the output current of the charging pile, and the output current of the wireless charging module;

[0031] When the charging current of the vehicle battery is greater than a set first current threshold and remains for a preset time, the charging pile and the wireless charging module are controlled to stop outputting charging power;

[0032] When the output current of the charging pile is greater than a set second current threshold and remains for a preset time, the charging pile is controlled to stop outputting charging power;

[0033] When the output current of the charging pile is greater than the set third current threshold and maintains the same for a preset time period, the wireless charging module is controlled to stop outputting charging power.

[0034] In the second aspect, the present application also provides an electric vehicle charging control system, including a vehicle controller, a battery management module, an on-board battery, a fast charging circuit, a wireless charging circuit and a switching component. The vehicle controller, the battery management module and the on-board battery are electrically connected in sequence, the fast charging circuit and the wireless charging circuit are electrically connected to the on-board battery respectively, the switching component is electrically connected to the battery management module, the fast charging circuit and the wireless charging circuit respectively, and the vehicle controller is used to execute the method provided in the first aspect of this application.

[0035] In a third aspect, the present application also provides an electric vehicle equipped with the electric vehicle charging control system provided in the first aspect of the present application.

[0036] The present application provides an electric vehicle charging control method, system, and electric vehicle. When the vehicle controller determines that P1+P2>P>P1>P2 is satisfied, it indicates that the charging power that the charging pile can provide is less than the required charging power of the vehicle battery, and the sum of the charging power that the charging pile can provide and the charging power that the wireless charging module can provide is greater than the required charging power of the vehicle battery. Therefore, the battery management module is notified to control the switching component to be in a first connection state to enable the fast charging circuit and the wireless charging circuit to be conductive, wherein P is the required charging power of the vehicle battery, P1 is the output charging power of the charging pile, and P2 is the rated charging power of the wireless charging module.

[0037] The vehicle controller controls the charging pile to output charging power, charging the vehicle battery through the fast charging circuit, and controls the wireless charging module to charge the vehicle battery with the difference between the required charging power and the output charging power of the charging pile. In this way, if the charging power provided by the charging pile is less than the required charging power of the vehicle battery, the wireless charging module can be used to make up the difference between the required charging power and the output charging power of the charging pile, allowing the vehicle battery to be charged at the required charging power, which is highly efficient and does not cause energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0039] Figure 1 One of the circuit module connection block diagrams of the electric vehicle charging control system provided by the embodiments of the present application;

[0040] Figure 2 One of the flowcharts of the electric vehicle charging control method provided by the embodiments of the present application;

[0041] Figure 3 The second circuit module connection block diagram of the electric vehicle charging control system provided by the embodiments of the present application;

[0042] Figure 4 The second flowchart of the electric vehicle charging control method provided by the embodiments of the present application;

[0043] Figure 5 The third flowchart of the electric vehicle charging control method provided by the embodiments of the present application;

[0044] Figure 6 The fourth flowchart of the electric vehicle charging control method provided by the embodiments of the present application. DETAILED DESCRIPTION

[0045] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood, however, that the description is merely exemplary and is not intended to limit the scope of the present disclosure. Also, in the following description, the description of well-known structures and techniques has been omitted to avoid obscuring the concept of the present disclosure.

[0046] In the drawings, various structural diagrams according to embodiments of the present disclosure are shown. These drawings are not drawn to scale, in which some details are exaggerated for the purpose of clear expression, and some details can be omitted. The shapes of various regions, layers, and their relative sizes and positional relationships shown in the drawings are merely exemplary, and in actuality, they can be deviated due to manufacturing tolerances or technical limitations, and a person skilled in the art can additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0047] In the context of the present disclosure, when one layer / element is referred to as being located "on" another layer / element, the layer / element can be directly on the other layer / element, or there can be an intervening layer / element therebetween. In addition, if one layer / element is located "on" another layer / element in one orientation, the layer / element can be located "under" the other layer / element when the orientation is reversed.

[0048] The technical solutions of the present application and how the technical solutions solve the above technical problems will be described in detail below with specific examples. The following specific examples can be combined with each other, and the same or similar concepts or processes can not be described again in some examples. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0049] The embodiment of the present application provides an electric vehicle charging control method, which is applied to an electric vehicle charging control system. Figure 1 As shown in the figure, the system provided by the embodiment of the present application includes a vehicle control unit VCU (Vehicle Control Unit, VCU), a battery management module, an on-board battery, a fast charging circuit, a wireless charging circuit and a switching component. The vehicle control unit, the battery management module and the on-board battery are electrically connected in sequence. The fast charging circuit and the wireless charging circuit are electrically connected with the on-board battery respectively. The switching component is electrically connected with the battery management module, the fast charging circuit and the wireless charging circuit respectively.

[0050] As shown in the figure, the switching component includes a first relay K1, a second relay K2, a third relay K3 and a fourth relay K4. Figure 1 As shown in the figure, when the first relay K1, the second relay K2, the third relay K3 and the fourth relay K4 are closed, the switching component is in the first connection state. At this time, the charging pile, the first relay K1, the third relay K3, the on-board battery, the fourth relay K4 and the second relay K2 are connected in sequence to form the fast charging circuit; the wireless charging module, the third relay K3, the on-board battery and the fourth relay K4 are connected in sequence to form the wireless charging circuit. When the first relay K1 and the second relay K2 are disconnected, and the third relay K3 and the fourth relay K4 are closed, the switching component is in the third connection state; at this time, only the wireless charging module, the third relay K3, the on-board battery and the fourth relay K4 are connected in sequence to form the wireless charging circuit.

[0051] Specifically, as shown in the figure, the method provided by the embodiment of the present application includes: Figure 2

[0052] S201: The vehicle control unit determines the required charging power of the on-board battery, the output charging power of the charging pile connected with the fast charging circuit and the rated charging power of the wireless charging module connected with the wireless charging circuit. ​

[0053] Exemplarily, the rated charging power of the wireless charging module can be obtained according to a preset original rated charging power and a charging efficiency. For example, the preset original rated charging power is 7kw, and the charging efficiency is 92%, and then the rated charging power of the wireless charging module is 7kw*92% = 6.44kw.

[0054] The vehicle charging demand power can be the sum of the charging demand power allowed by the vehicle battery and the consumption power of the vehicle high-voltage accessories (such as air conditioner, PTC heater). The output charging power of the charging pile is the output voltage of the charging pile*the output current of the charging pile; wherein the output voltage of the charging pile is the signal CCS_OutPut_Voltage in the fast charging message sent by the charging pile, and the output current of the charging pile is the signal CCS_OutPut_Current in the fast charging message sent by the charging pile.

[0055] S202: The vehicle controller informs the battery management module to control the switching assembly to be in the first connection state to make the fast charging loop and the wireless charging loop conductive under the condition that P1+P2>P>P1>P2 is determined, wherein P is the demand charging power of the vehicle battery, P1 is the output charging power of the charging pile, and P2 is the rated charging power of the wireless charging module.

[0056] S203: The vehicle controller controls the charging pile to output the charging power to charge the vehicle battery through the fast charging loop, and controls the wireless charging module to charge the vehicle battery with the difference power between the demand charging power and the output charging power of the charging pile.

[0057] At this time, the charging demand voltage of the charging pile = (BMS_Voltage+20V); the charging demand current of the charging pile = (P1+5kw) / BMS_Voltage; and the charging demand current of the wireless charging module = (P-P1) / BMS_Voltage.

[0058] Based on the above, the vehicle controller determines that the charging power that the charging pile can provide is less than the demand charging power of the vehicle battery, and the sum of the charging power that the charging pile can provide and the charging power that the wireless charging module can provide is greater than the demand charging power of the vehicle battery under the condition that P1+P2>P>P1>P2 is determined. Therefore, the battery management module can be informed to control the switching assembly to be in the first connection state to make the fast charging loop and the wireless charging loop conductive, wherein P is the demand charging power of the vehicle battery, P1 is the output charging power of the charging pile, and P2 is the rated charging power of the wireless charging module.

[0059] The whole vehicle controller controls the charging pile to output the charging power, charges the vehicle battery through the fast charging loop, and controls the wireless charging module to charge the vehicle battery with the difference power between the required charging power and the output charging power of the charging pile. In this way, in the case that the charging power that the charging pile can provide is less than the required charging power of the vehicle battery, the difference between the required charging power and the output charging power of the charging pile can be made up by the wireless charging module, so that the vehicle battery can be charged at the required charging power, which is efficient and does not cause waste of electric energy.

[0060] In addition, after S201, as shown in Figure 3 The switching assembly further includes a fifth relay K5 and a sixth relay K6. The wireless charging module, the fifth relay K5, the third relay K3, the vehicle battery, the fourth relay K4, and the sixth relay K6 are connected in series to form a loop. When the first relay K1, the second relay K2, the third relay K3, and the fourth relay K4 are closed, and the fifth relay K5 and the sixth relay K6 are disconnected, the switching assembly is in the second connection state. As shown in Figure 4 The method provided by the embodiment of the application further includes the following steps.

[0061] S401: The whole vehicle controller determines that P1>P>P2 is satisfied, and informs the battery management module to control the switching assembly to be in the second connection state, so as to make the fast charging loop conductive and the wireless charging loop disconnected.

[0062] S402: The whole vehicle controller controls the charging pile to charge the vehicle battery with the required charging power of the vehicle battery.

[0063] At this time, the charging demand voltage of the charging pile=(BMS_Voltage+20V); the charging demand current of the charging pile=(P-P2) / BMS_Voltage; and the charging demand current of the wireless charging module=P2 / BMS_Voltage.

[0064] Based on the above S301-S302, it is determined that P1>P>P2 is satisfied, which means that the charging pile can output charging power greater than the required charging power of the vehicle battery, so the charging pile can be directly controlled to charge the vehicle battery with the required charging power of the vehicle battery, and the charging efficiency of the charging pile is high.

[0065] In addition, after S201, as shown in Figure 5 The method provided by the embodiment of the application further includes the following steps.

[0066] S501: The whole vehicle controller determines that P1>P>P2 is satisfied, and informs the battery management module to control the switching assembly to be in the first connection state, so as to make the fast charging loop conductive and the wireless charging loop conductive.

[0067] S502: The vehicle controller controls the wireless charging module to charge the vehicle battery through the wireless charging loop at the rated charging power, and controls the charging pile to charge the vehicle battery at the difference between the required charging power of the vehicle battery and the rated charging power.

[0068] Based on the above S501-S502, it is determined that P1>P>P2 is satisfied, which means that the wireless charging module can output a charging power less than the required charging power of the vehicle battery. Therefore, the wireless charging module can be controlled to charge the vehicle battery through the wireless charging loop at the rated charging power, and the charging pile can be controlled to charge the vehicle battery at the difference between the required charging power of the vehicle battery and the rated charging power, thereby ensuring the charging efficiency of the vehicle battery.

[0069] In addition, after S201, as shown in Figure 6 The method provided by the embodiment of the application further includes:

[0070] S601: When it is determined that P>P1+P2 is satisfied, the vehicle controller informs the battery management module to control the switching component to be in the first connection state, so as to make the fast charging loop and the wireless charging loop conductive.

[0071] S602: The vehicle controller controls the charging pile to output the charging power to charge the vehicle battery through the fast charging loop, and controls the wireless charging module to charge the vehicle battery at the rated charging power.

[0072] At this time, the charging demand current of the wireless charging module = P2 / BMS_Voltage, where BMS_Voltage is the current real-time voltage of the vehicle battery; the charging demand current of the charging pile = Min[(P-P2), (P1+5kw)] / BMS_Voltage; that is, the charging demand current of the charging pile is equal to (P-P2) and (P1+5kw) after taking the smaller one, and then divided by the current real-time voltage of the vehicle battery; in addition, since the current voltage of the vehicle battery is directly used as the charging demand voltage of the charging pile, the output of the charging pile will be limited due to the voltage drop of the fast charging loop, and the vehicle battery cannot be fully charged. Therefore, the charging demand voltage of the charging pile = (BMS_Voltage+20V).

[0073] Based on the above S601-S602, efficient charging of the vehicle battery can be achieved.

[0074] In addition, after S201, in some embodiments, the method provided by the embodiment of the application further includes: the vehicle controller determines that the vehicle demand power is very small when P

[0075] Further, after the charging pile is controlled to charge the vehicle battery through the fast charging loop at the demand charging power, the method provided by the embodiment of the application further includes: the vehicle controller determines that P1>P>P2, and notifies the battery management module to control the switching assembly to switch from the second connection state to the first connection state, so as to make the fast charging loop conductive and the wireless charging loop conductive; the vehicle controller controls the wireless charging module to charge the vehicle battery through the wireless charging loop at the rated charging power, and controls the charging pile to charge the vehicle battery at the difference between the demand charging power and the rated charging power of the vehicle battery. In this way, when the demand power of the vehicle battery rises, the charging power of the vehicle battery is also dynamically increased, and the charging efficiency is improved.

[0076] In addition, after S201, the method provided by the embodiment of the application further includes:

[0077] The vehicle controller determines that the vehicle demand power is very small when P

[0078] In the case that the remaining power is higher than the set power threshold, it indicates that the vehicle battery is sufficient, and the demand power of the vehicle battery fluctuates less during the charging process, so the control switching assembly is controlled to be in the second connection state, so as to make the fast charging loop conductive and the wireless charging loop disconnected, and the charging pile is controlled to charge the vehicle battery at the demand charging power, which can realize efficient charging of the vehicle battery.

[0079] Or, in the case of the remaining power is higher than the set power threshold, the battery management module is informed to control the control switching component in the third connection state to make the fast charging circuit disconnected and the wireless charging circuit conductive; and control the wireless charging module to charge the vehicle-mounted battery with the required charging power, which can realize efficient charging of the vehicle-mounted battery.

[0080] In addition, the method provided by the embodiment of the application can further include:

[0081] The vehicle-mounted battery, the output current of the charging pile, and the output current of the wireless charging module are obtained by the vehicle controller.

[0082] In the case that the charging current of the vehicle-mounted battery is greater than the set first current threshold (such as the preset vehicle-mounted battery allowed charging current x 110%) and remains for a preset time (such as 2s), the charging pile and the wireless charging module are both controlled to stop outputting the charging power.

[0083] Or, in the case that the output current of the charging pile is greater than the set second current threshold (such as the required charging current of the charging pile x 110%) and remains for a preset time (such as 2s), the charging pile is controlled to stop outputting the charging power.

[0084] Wherein, in the case of P>(P1+P2), the required charging current of the charging pile = (P1+5kw) / BMS_Voltage, in the case of P1+P2>P>P1, the required charging current of the charging pile = Min[(P-P2), (P1+5kw)] / BMS_Voltage, in the case of P1>P>P2, the required charging current of the charging pile = (P-P2) / BMS_Voltage, and in the case of P1>P>P2, the required charging current of the charging pile = P / BMS_Voltage, wherein BMS_Voltage is the current voltage of the vehicle-mounted battery.

[0085] Or, in the case that the output current of the charging pile is greater than the set third current threshold (such as the required charging current of the wireless charging module x 120%) and remains for a preset time, the wireless charging module is controlled to stop outputting the charging power, and the required charging current of the charging pile = P2 / BMS_Voltage, wherein BMS_Voltage is the current voltage of the vehicle-mounted battery.

[0086] It should be noted that in the case of P>(P1+P2), the required charging current of the wireless charging module =P2 / BMS_Voltage; in the case of P1+P2>P>P1, the required charging current of the wireless charging module =Min[(P-P2), (P1+5kw)] / BMS_Voltage; in the case of P1>P>P2, the required charging current of the wireless charging module =(P-P2) / BMS_Voltage; in the case of P<P2, the required charging current of the wireless charging module =P2 / BMS_Voltage, P / BMS_Voltage.

[0087] It can be understood that the overcurrent diagnosis can be performed on the electric vehicle charging control system in the above manner, and the overcurrent protection is performed when the overcurrent diagnosis is performed, so as to ensure the safety of the charging process.

[0088] In addition, the electric vehicle charging control system provided in the embodiments of the present application comprises a vehicle controller, a battery management module, an on-board battery, a fast charging circuit, a wireless charging circuit and a switching component, the vehicle controller, the battery management module and the on-board battery are electrically connected in sequence, the fast charging circuit and the wireless charging circuit are electrically connected with the on-board battery respectively, the switching component is electrically connected with the battery management module, the fast charging circuit and the wireless charging circuit respectively, and the vehicle controller is used to execute the method provided in the above embodiments of the present application.

[0089] In addition, the electric vehicle provided in the embodiments of the present application is installed with the electric vehicle charging control system provided in the above embodiments of the present application.

[0090] In the above description, the technical details such as the arrangement of each layer are not described in detail. However, those skilled in the art should understand that the layers, regions and the like with the required shapes can be formed by various technical means. In addition, those skilled in the art can also design methods that are not exactly the same as the above-described methods in order to form the same structure. In addition, although each embodiment is described above, this does not mean that the measures in each embodiment cannot be used advantageously in combination.

[0091] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they understand the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0092] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A method for controlling charging of an electric vehicle, characterized in that: Applied to an electric vehicle charging control system, the system includes a vehicle controller, a battery management module, an on-board battery, a fast charging circuit, a wireless charging circuit, and a switching component. The vehicle controller, the battery management module, and the on-board battery are electrically connected in sequence, the fast charging circuit and the wireless charging circuit are electrically connected to the on-board battery respectively, and the switching component is electrically connected to the battery management module, the fast charging circuit, and the wireless charging circuit respectively. The method includes: The vehicle controller determines the required charging power of the on-board battery, the output charging power of the charging pile connected to the fast charging circuit, and the rated charging power of the wireless charging module connected to the wireless charging circuit; When the vehicle controller determines that P1+P2>P>P1>P2 is satisfied, it notifies the battery management module to control the switching component to be in the first connection state, so that the fast charging circuit and the wireless charging circuit are turned on, where P is the required charging power of the vehicle battery, P1 is the output charging power of the charging pile, and P2 is the rated charging power of the wireless charging module; The vehicle controller controls the charging pile to charge the vehicle battery through the fast charging circuit with the output charging power, and controls the wireless charging module to charge the vehicle battery with the difference between the required charging power and the output charging power of the charging pile.

2. The method according to claim 1, characterized in that After the vehicle controller determines the required charging power of the vehicle battery, the output charging power of the charging pile connected to the fast charging circuit, and the rated charging power of the wireless charging module connected to the wireless charging circuit, the method further includes: When determining that P1>P>P2 is satisfied, the vehicle controller notifies the battery management module to control the switching component to be in the second connection state, so that the fast charging circuit is turned on and the wireless charging circuit is turned off; The vehicle controller controls the charging pile to charge the vehicle battery according to the required charging power of the vehicle battery.

3. The method according to claim 1, characterized in that After the vehicle controller determines the required charging power of the vehicle battery, the output charging power of the charging pile connected to the fast charging circuit, and the rated charging power of the wireless charging module connected to the wireless charging circuit, the method further includes: When determining that P1>P>P2 is satisfied, the vehicle controller notifies the battery management module to control the switching component to be in the first connection state, so that the fast charging circuit and the wireless charging circuit are turned on; The vehicle controller controls the wireless charging module to charge the vehicle battery through the wireless charging circuit at the rated charging power, and controls the charging pile to charge the vehicle battery at the difference between the required charging power of the vehicle battery and the rated charging power.

4. The method according to claim 1, wherein After the vehicle controller determines the required charging power of the vehicle battery, the output charging power of the charging pile connected to the fast charging circuit, and the rated charging power of the wireless charging module connected to the wireless charging circuit, the method further includes: When the vehicle controller determines that P < P2 < P1 is satisfied, it obtains the remaining power and temperature of the vehicle-mounted battery from the battery management module; When the remaining power is lower than the set power threshold and the temperature of the vehicle-mounted battery is lower than the set temperature threshold, it notifies the battery management module to control the switching component to be in the second connection state, so that the fast charging circuit is turned on and the wireless charging circuit is turned off; Control the charging pile to charge the vehicle-mounted battery through the fast charging circuit at the required charging power.

5. The method according to claim 4, characterized in that After controlling the charging pile to charge the vehicle-mounted battery through the fast charging circuit at the required charging power, the method further includes: When the vehicle controller determines that P1 > P > P2 is satisfied, it notifies the battery management module to control the switching component to switch from the second connection state to the first connection state, so that the fast charging circuit is turned on and the wireless charging circuit is turned on; The vehicle controller controls the wireless charging module to charge the vehicle-mounted battery through the wireless charging circuit at the rated charging power, and controls the charging pile to charge the vehicle-mounted battery at the difference between the required charging power of the vehicle-mounted battery and the rated charging power.

6. The method according to claim 1, characterized in that After the vehicle controller determines the required charging power of the vehicle-mounted battery, the output charging power of the charging pile connected to the fast charging circuit, and the rated charging power of the wireless charging module connected to the wireless charging circuit, the method further includes: When the vehicle controller determines that P < P2 < P1 is satisfied, it notifies the battery management module to obtain the remaining power of the vehicle-mounted battery from the battery management module; When the remaining power is higher than the set power threshold, control the switching component to be in the second connection state, so that the fast charging circuit is turned on and the wireless charging circuit is turned off, and control the charging pile to charge the vehicle-mounted battery at the required charging power; Or when the remaining power is higher than the set power threshold, notify the battery management module to control the switching component to be in the third connection state, so that the fast charging circuit is turned off and the wireless charging circuit is turned on; and control the wireless charging module to charge the vehicle-mounted battery at the required charging power.

7. The method according to claim 1, characterized in that After the vehicle controller determines the required charging power of the vehicle-mounted battery, the output charging power of the charging pile connected to the fast charging circuit, and the rated charging power of the wireless charging module connected to the wireless charging circuit, the method further includes: When the vehicle controller determines that P > P1 + P2 is satisfied, it notifies the battery management module to control the switching component to be in the first connection state, so that the fast charging circuit is turned on and the wireless charging circuit is turned on; The vehicle controller controls the charging pile to charge the vehicle-mounted battery through the fast charging circuit at the output charging power, and controls the wireless charging module to charge the vehicle-mounted battery at the rated charging power.

8. The method according to any one of claims 1 to 7, characterized in that: The method further includes: The vehicle controller obtains the charging current of the vehicle battery, the output current of the charging pile, and the output current of the wireless charging module; When the charging current of the vehicle battery is greater than a set first current threshold and remains at a preset time, controlling the charging pile and the wireless charging module to stop outputting charging power; Alternatively, when the output current of the charging pile is greater than a set second current threshold and remains for a preset time period, controlling the charging pile to stop outputting charging power; Alternatively, when the output current of the charging pile is greater than a set third current threshold and maintains a preset time period, the wireless charging module is controlled to stop outputting charging power.

9. An electric vehicle charging control system, characterized in that: The vehicle controller comprises a vehicle controller, a battery management module, a vehicle battery, a fast charging circuit, a wireless charging circuit and a switching component. The vehicle controller, the battery management module and the vehicle battery are electrically connected in sequence. The fast charging circuit and the wireless charging circuit are electrically connected to the vehicle battery respectively. The switching component is electrically connected to the battery management module, the fast charging circuit and the wireless charging circuit respectively. The vehicle controller is used to execute any of the methods described in claims 1-8.

10. An electric vehicle, characterized in that: The electric vehicle charging control system according to claim 9 is installed.

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