A charging control method, device, system and new energy vehicle

Abstract

The application provides a charging control method, device, system and new energy vehicle, wherein the method applied to the vehicle comprises the following steps: after detecting a charging gun insertion signal, acquiring a first maximum output voltage of a charging pile; judging whether the vehicle needs to adopt a boost charging mode for charging according to the first maximum output voltage; when it is judged that the vehicle needs to adopt the boost charging mode for charging, sending a first power storage battery charging parameter message about the boost charging to the charging pile, and outputting a first control signal to a boost control circuit to make the boost control circuit switch to a boost charging mode. According to the application, before receiving a charging machine maximum output capacity message sent by the charging pile, a first maximum output voltage of the charging pile is acquired first, and it is judged whether the vehicle needs boost charging, and then when it is determined that boost charging is needed, the boost charging mode is used for charging, which is beneficial to improving the charging efficiency of the vehicle when facing different types of charging piles.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle charging technology, and in particular to a charging control method, device, system, and new energy vehicle. Background Technology

[0002] For vehicles using high-voltage battery platforms (>500V), when charging at 500V DC charging stations, voltage conversion is required because the maximum output voltage of the charging station is lower than the current battery voltage. Existing solutions use a motor controller or a separate boost converter for this conversion. However, because the charger maximum output capacity message (CML) sent by the charging station in GB / T 27930 is later than the power battery charging parameter message (BCP) sent by the vehicle, the vehicle cannot prioritize identifying whether the charging station is 500V or 750V. Therefore, improving the charging efficiency of vehicles at different types of charging stations has become an urgent problem to be solved in this field. Summary of the Invention

[0003] The technical objective of this application is to provide a charging control method, device, system, and new energy vehicle to address the problem of low charging efficiency in current vehicles due to their inability to prioritize the identification of the highest output voltage of charging piles. To solve the above technical problem, this application provides a charging control method applied to a vehicle, the method comprising:

[0004] After detecting the charging gun insertion signal, the first highest output voltage of the charging pile is obtained;

[0005] Based on the highest output voltage, determine whether the vehicle needs to be charged using a boost charging method;

[0006] When it is determined that the vehicle needs to be charged using boost charging, a first power battery charging parameter message about boost charging is sent to the charging pile, and a first control signal is output to the boost control circuit to switch the boost control circuit to boost charging mode.

[0007] Specifically, the charging control method described above determines whether the vehicle needs to be charged using a boost charging method based on the first highest output voltage, including:

[0008] When the first maximum output voltage is less than the first voltage value, it is determined that the vehicle needs to be charged using a boost charging method;

[0009] When the first highest output voltage is greater than or equal to the first voltage value, it is determined that the vehicle does not need to be charged using a boost charging method.

[0010] Furthermore, the charging control method described above also includes:

[0011] Receive the maximum output capacity message of the charger sent by the charging pile, and determine the second highest output voltage of the charging pile based on the maximum output capacity message of the charger;

[0012] When the second highest output voltage is greater than the second voltage value, a charging demand message is sent to the charging pile according to the current voltage of the battery. The charging demand message is used to gradually increase the output voltage of the charging pile to the current voltage. The second voltage value is less than the first voltage value.

[0013] When the output voltage of the charging pile reaches the current voltage, a second control signal is output to the boost control circuit, causing the boost control circuit to switch to direct charging mode.

[0014] Specifically, the charging control method described above, after determining whether the vehicle needs to be charged using a boost charging method based on the first highest output voltage, further includes:

[0015] If it is determined that the vehicle does not need to be charged using the boost charging method, a second power battery charging parameter message for direct charging is sent to the charging pile, and a second control signal is output to the boost control circuit to switch the boost control circuit to the direct charging mode.

[0016] Specifically, the charging control method described above, after detecting the charging gun insertion signal, acquires the highest output voltage of the charging pile, including:

[0017] After detecting the charging gun insertion signal, the charging pile is subjected to insulation testing;

[0018] The highest voltage detected during the insulation test of the charging pile is determined as the first highest output voltage.

[0019] Another embodiment of this application provides a control device, the device comprising:

[0020] The first processing module is used to obtain the first highest output voltage of the charging pile after detecting the charging gun insertion signal;

[0021] The second processing module is used to determine whether the vehicle needs to be charged using a boost charging method based on the first maximum output voltage.

[0022] The third processing module is used to send a first power battery charging parameter message about boost charging to the charging pile when it is determined that the vehicle needs to be charged in the boost charging mode, and to output a first control signal to the boost control circuit to switch the boost control circuit to boost charging mode.

[0023] Another embodiment of this application provides a charging system, including: a boost control circuit and the control device as described above;

[0024] The charging control device is connected to the boost control circuit.

[0025] Another embodiment of this application provides a new energy vehicle, including the charging system described above.

[0026] Another embodiment of this application provides a readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the charging control method described above.

[0027] Compared with the prior art, the charging control method, device, system, and new energy vehicle provided in this application have at least the following beneficial effects:

[0028] The charging control method of this application, after the charging gun is inserted into the vehicle, before the vehicle receives the maximum output capacity message of the charger sent by the charging pile, first obtains a first maximum output voltage of the charging pile, and determines whether the vehicle needs to be charged in boost charging mode based on the first maximum output voltage. Then, when it is determined that it needs to be charged, it sends a first power battery charging parameter message about boost charging to the charging pile, so that the charging pile outputs voltage according to the charging parameters corresponding to boost charging, and controls the boost control circuit in the vehicle to switch to boost charging mode for charging. This helps to ensure that charging starts before the vehicle receives the message, thereby improving the charging efficiency of the vehicle when facing different types of charging piles. Attached Figure Description

[0029] Figure 1 This is one of the flowcharts illustrating the charging control method of this application;

[0030] Figure 2 This is a schematic diagram of the boost control circuit in this application;

[0031] Figure 3 This is the second flowchart illustrating the charging control method of this application;

[0032] Figure 4 This is a schematic diagram of the control device of this application. Detailed Implementation

[0033] To make the technical problems, technical solutions, and advantages of this application clearer, a detailed description will be provided below in conjunction with the accompanying drawings and specific embodiments. In the following description, specific details such as particular configurations and components are provided merely to aid in a comprehensive understanding of the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Furthermore, for clarity and brevity, descriptions of known functions and structures have been omitted.

[0034] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0035] In the various embodiments of this application, it should be understood that the sequence number of each process described below does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0036] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0037] In the embodiments provided in this application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B solely based on A; B can also be determined based on A and / or other information.

[0038] See Figure 1 One embodiment of this application provides a charging control method applied to a vehicle, the method comprising:

[0039] Step S101: After detecting the charging gun insertion signal, obtain the first highest output voltage of the charging pile;

[0040] Step S102: Based on the first highest output voltage, determine whether the vehicle needs to be charged using a boost charging method.

[0041] Step S103: When it is determined that the vehicle needs to be charged using boost charging, a first power battery charging parameter message about boost charging is sent to the charging pile, and a first control signal is output to the boost control circuit to switch the boost control circuit to boost charging mode.

[0042] In one embodiment of this application, when a new energy vehicle is charging, especially in a DC fast charging scenario, after the vehicle detects a charging gun insertion signal from the charging pile, it acquires the first maximum output voltage of the charging pile. It should be noted that this first maximum output voltage is a pre-charging judgment value used by the vehicle side, primarily to determine whether the vehicle needs to use boost charging, rather than the actual maximum output voltage of the charging pile. In a specific embodiment, the step of acquiring the first maximum output voltage is as follows: after detecting the charging gun insertion signal, an insulation test is performed on the charging pile, and the highest voltage detected during the insulation test is determined as the first maximum output voltage. When it is determined based on the first maximum output voltage that the vehicle needs to use boost charging, a first power battery charging parameter message regarding boost charging is sent to the charging pile. This causes the charging pile to adjust its output voltage according to the first power battery charging parameter message and outputs a first control signal to the boost control circuit, switching the boost control circuit to boost charging mode. Thus, the vehicle can boost the output voltage of the charging pile before charging, ensuring the vehicle's charging efficiency.

[0043] In summary, the charging control method of this application, after the charging gun is inserted into the vehicle, before the vehicle receives the maximum output capacity message of the charger sent by the charging pile, first obtains a first maximum output voltage of the charging pile, and determines whether the vehicle needs to be charged in boost charging mode based on the first maximum output voltage. Then, when it is determined that it needs to be charged, it sends a first power battery charging parameter message about boost charging to the charging pile, so that the charging pile outputs voltage according to the charging parameters corresponding to boost charging, and controls the boost control circuit in the vehicle to switch to boost charging mode for charging. This helps to ensure that charging starts before the vehicle receives the message, thereby improving the charging efficiency of the vehicle when facing different types of charging piles.

[0044] It should be noted that, for example, the first power battery charging parameter message includes: the current voltage of the battery and the output voltage that the charging pile needs to output, wherein the output voltage is less than the current voltage.

[0045] like Figure 2 As shown, in one embodiment, the boost control circuit includes: a charging port 201 corresponding to the charging pile, a boost device 202, and an output port 203 corresponding to the battery. It has a direct charging mode that connects the charging port 201 and the output port 203 by closing only the first control switch 204, and a boost charging mode that connects the charging port 201 and the output port 203 by closing only the boost device 202 and the second control switch 205.

[0046] In one specific embodiment, the boost control circuit includes a positive bus and a negative bus. A first control switch and a second control switch are disposed on the positive bus of the boost control circuit, and a third control switch is disposed on the negative bus. The third control switch is closed when the boost control circuit is in boost charging mode and direct charging mode.

[0047] Specifically, the charging control method described above determines whether the vehicle needs to be charged using a boost charging method based on the first highest output voltage, including:

[0048] When the first maximum output voltage is less than the first voltage value, it is determined that the vehicle needs to be charged using a boost charging method;

[0049] When the first highest output voltage is greater than or equal to the first voltage value, it is determined that the vehicle does not need to be charged using a boost charging method.

[0050] In another embodiment of this application, when determining whether the vehicle needs to be charged using a boost charging method based on a first maximum output voltage, the first maximum output voltage is compared with a preset first voltage value. When the first maximum output voltage is greater than or equal to the first voltage value, it can be determined that the charging pile can meet the vehicle's voltage requirements. In this case, it can be determined that the vehicle and the charging pile can be charged directly, and therefore boost charging is not required. When the first maximum output voltage is less than the first voltage value, it can be determined that the charging pile cannot meet the vehicle's voltage requirements or it is uncertain whether the charging pile meets the vehicle's voltage requirements. In this case, if the vehicle and the charging pile are charged directly, the charging efficiency will be low. Therefore, boost charging is required to ensure charging efficiency.

[0051] In one specific embodiment of this application, when the first maximum output voltage is less than the first voltage value, based on different insulation detection methods, at least two situations exist: one where the maximum output capacity of the charging pile can be determined based on the first maximum output voltage, and the other where the maximum output capacity of the charging pile cannot be determined based on the first maximum output voltage, i.e., it is uncertain whether the charging pile meets the vehicle's voltage requirements. In this case, a second voltage value less than the first voltage value can be introduced for further judgment. When the first maximum output voltage is less than or equal to the second voltage value, it is determined that the maximum output capacity of the charging pile cannot be determined based on the first maximum output voltage. When the first maximum output voltage is greater than the second voltage value and less than the first voltage value, it is determined that the maximum output capacity of the charging pile cannot meet the vehicle's voltage requirements. In one embodiment, when the maximum output capacity of the charging pile to be judged includes two types, 500V and 750V, the first voltage value is 550V and the second voltage value is 300V.

[0052] It should also be noted that, for different vehicles, this first voltage value can be adjusted appropriately according to the current battery voltage.

[0053] See Figure 3 Furthermore, the charging control method described above also includes:

[0054] Step S301: Receive the charger maximum output capacity message sent by the charging pile, and determine the second highest output voltage of the charging pile based on the charger maximum output capacity message;

[0055] Step S302: When the second highest output voltage is greater than the first voltage value, a charging demand message is sent to the charging pile according to the current voltage of the battery. The charging demand message is used to gradually increase the output voltage of the charging pile to the current voltage.

[0056] Step S303: When the output voltage of the charging pile reaches the current voltage, a second control signal is output to the boost control circuit to switch the boost control circuit to the direct charging mode.

[0057] In another embodiment of this application, when using boost charging, upon receiving a message from the charging pile, the second highest output voltage of the charging pile, i.e., the maximum output capacity of the charging pile, is determined based on the message. To avoid misjudgment, this second highest output voltage is compared with a first voltage value. If the second highest output voltage is greater than the first voltage value, a misjudgment is confirmed, and the charging pile and vehicle can be directly connected for charging. In this case, to improve subsequent charging efficiency, the system switches to direct charging mode. Specifically, to avoid direct switching affecting components, a charging demand message is sent to the charging pile based on the current battery voltage. Upon receiving the charging demand message, the charging pile gradually increases the output voltage based on the current battery voltage until it reaches the current battery voltage. Then, it outputs a second control signal to the boost control circuit, causing the boost control circuit to switch to direct charging mode, completing the charging mode switch. This allows the vehicle and charging pile to charge directly, reducing the need for relays in the boost equipment and further improving charging efficiency.

[0058] Specifically, the charging control method described above, after determining whether the vehicle needs to be charged using a boost charging method based on the first highest output voltage, further includes:

[0059] If it is determined that the vehicle does not need to be charged using the boost charging method, a second power battery charging parameter message for direct charging is sent to the charging pile, and a second control signal is output to the boost control circuit to switch the boost control circuit to the direct charging mode.

[0060] In another embodiment of this application, when it is determined that the vehicle does not need to be charged using a boost charging method, a second power battery charging parameter message for direct charging is sent to the charging pile. The charging pile adjusts its output voltage according to the current battery voltage carried in the second power battery charging parameter message, and outputs a second control signal to the boost control circuit to switch the boost control circuit to the direct charging mode, so as to directly charge the vehicle and the charging pile, thus ensuring the charging efficiency of the vehicle.

[0061] See Figure 4 Another embodiment of this application also provides a control device, the device comprising:

[0062] The first processing module 401 is used to obtain the first highest output voltage of the charging pile after detecting the charging gun insertion signal;

[0063] The second processing module 402 is used to determine whether the vehicle needs to be charged using a boost charging method based on the first maximum output voltage.

[0064] The third processing module 403 is used to send a first power battery charging parameter message about boost charging to the charging pile when it is determined that the vehicle needs to be charged in a boost charging mode, and to output a first control signal to the boost control circuit to switch the boost control circuit to boost charging mode.

[0065] Specifically, the control device described above, the second processing module, includes:

[0066] The first processing unit is used to determine that the vehicle needs to be charged using a boost charging method when the first maximum output voltage is less than the first voltage value.

[0067] The second processing unit is used to determine that the vehicle does not need to be charged using a boost charging method when the first highest output voltage is greater than or equal to the first voltage value.

[0068] Furthermore, the control device described above also includes:

[0069] The fourth processing module is used to receive the charger's maximum output capacity message sent by the charging pile, and determine the second highest output voltage of the charging pile based on the charger's maximum output capacity message.

[0070] The fifth processing module is used to send a charging demand message to the charging pile according to the current voltage of the battery when the second highest output voltage is greater than the second voltage value. The charging demand message is used to gradually increase the output voltage of the charging pile to the current voltage.

[0071] The sixth processing module is used to output a second control signal to the boost control circuit when the output voltage of the charging pile reaches the current voltage, so that the boost control circuit switches to direct charging mode.

[0072] Specifically, the control device described above also includes:

[0073] The seventh processing module is used to send a second power battery charging parameter message to the charging pile when it is determined that the vehicle does not need to be charged by boost charging, and to output a second control signal to the boost control circuit to switch the boost control circuit to direct charging mode.

[0074] Specifically, in the control device described above, the first processing module includes:

[0075] The first processing unit is used to perform insulation detection on the charging pile after detecting the charging gun insertion signal;

[0076] The second processing unit is used to determine the highest voltage of the charging pile detected during the insulation detection process, which is the first highest output voltage.

[0077] The embodiment of the control device in this application is a device corresponding to the embodiment of the charging control method described above. All implementation means in the above method embodiment are applicable to the embodiment of this device and can achieve the same technical effect.

[0078] Another embodiment of this application provides a charging system, including: a boost control circuit and the control device as described above;

[0079] The charging control device is connected to the boost control circuit.

[0080] Another embodiment of this application provides a new energy vehicle, including the charging system described above.

[0081] Another embodiment of this application provides a readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the steps of the charging control method described above. This achieves the same technical effect and will not be repeated here to avoid repetition. The readable storage medium includes, but is not limited to, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0082] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0083] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0084] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principles described in this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A charging control method applied to a vehicle, characterized in that, The method includes: After detecting the charging gun insertion signal, the first highest output voltage of the charging pile is obtained; Based on the first highest output voltage, determine whether the vehicle needs to be charged using a boost charging method; When it is determined that the vehicle needs to be charged using boost charging, a first power battery charging parameter message about boost charging is sent to the charging pile, and a first control signal is output to the boost control circuit to switch the boost control circuit to boost charging mode. The step of obtaining the first highest output voltage of the charging pile after detecting the charging gun insertion signal includes: After detecting the charging gun insertion signal, an insulation test is performed on the charging pile; The highest voltage of the charging pile detected during the insulation detection process is determined as the first highest output voltage; Based on the first highest output voltage, determine whether the vehicle needs to be charged using a boost charging method, including: If the first maximum output voltage is less than the first voltage value, it is determined that the vehicle needs to be charged using a boost charging method. When the first maximum output voltage is greater than or equal to the first voltage value, it is determined that the vehicle does not need to be charged using a boost charging method; The charging control method further includes: receiving a maximum output capacity message of the charger sent by the charging pile, and determining the second highest output voltage of the charging pile based on the maximum output capacity message of the charger; When the second highest output voltage is greater than the second voltage value, a charging demand message is sent to the charging pile according to the current voltage of the battery. The charging demand message is used to gradually increase the output voltage of the charging pile to the current voltage. The second voltage value is less than the first voltage value. When the output voltage of the charging pile reaches the current voltage, a second control signal is output to the boost control circuit to switch the boost control circuit to direct charging mode.

2. The charging control method according to claim 1, characterized in that, After determining whether the vehicle needs to be charged using a boost charging method based on the first highest output voltage, the process further includes: If it is determined that the vehicle does not need to be charged using the boost charging method, a second power battery charging parameter message for direct charging is sent to the charging pile, and a second control signal is output to the boost control circuit to switch the boost control circuit to the direct charging mode.

3. A control device, characterized in that, The device includes: The first processing module is used to obtain the first highest output voltage of the charging pile after detecting the charging gun insertion signal; The second processing module is used to determine whether the vehicle needs to be charged using a boost charging method based on the first highest output voltage. The third processing module is used to send a first power battery charging parameter message about boost charging to the charging pile when it is determined that the vehicle needs to be charged in a boost charging mode, and to output a first control signal to the boost control circuit to switch the boost control circuit to boost charging mode. The first processing module includes: The first processing unit is used to perform insulation detection on the charging pile after detecting the charging gun insertion signal; The second processing unit is used to determine the highest voltage of the charging pile detected during the insulation detection process, which is the first highest output voltage; The second processing module includes: The first processing unit is used to determine that the vehicle needs to be charged using a boost charging method when the first maximum output voltage is less than the first voltage value. The second processing unit is used to determine that the vehicle does not need to be charged by boost charging when the first maximum output voltage is greater than or equal to the first voltage value. The control device further includes: The fourth processing module is used to receive the charger's maximum output capacity message sent by the charging pile, and determine the second highest output voltage of the charging pile based on the charger's maximum output capacity message. The fifth processing module is used to send a charging demand message to the charging pile according to the current voltage of the battery when the second highest output voltage is greater than the second voltage value. The charging demand message is used to gradually increase the output voltage of the charging pile to the current voltage. The sixth processing module is used to output a second control signal to the boost control circuit when the output voltage of the charging pile reaches the current voltage, so that the boost control circuit switches to direct charging mode.

4. A charging system, characterized in that, include: A boost control circuit and the control device as described in claim 3; The control device is connected to the boost control circuit.

5. A new energy vehicle, characterized in that, Includes the charging system as described in claim 4.

6. A readable storage medium, characterized in that, The readable storage medium stores a computer program that, when executed by a processor, implements the steps of the charging control method as described in claim 1 or 2.

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