Charging voltage control method, device, equipment, storage medium and program product

Abstract

The present application provides a charging voltage control method, device, equipment, storage medium and program product. The method includes: receiving the maximum output voltage value of the charging pile sent by the battery management system, and obtaining the battery pack voltage value, wherein the maximum output voltage value of the charging pile is sent to the battery management system by the charging gun when the charging pile detects that the charging gun is inserted; determining the target voltage value of the buck side voltage of the boost unit according to the maximum output voltage value of the charging pile and the battery pack voltage value; adjusting the voltage of the buck side of the boost unit to the target voltage value, and when the voltage of the buck side of the boost unit reaches the target voltage value, inputting the voltage of the buck side of the boost unit into the charging pile, so that the charging pile outputs a charging current after determining that the voltage of the buck side of the boost unit meets the preset requirements. The method of the present application increases the charging efficiency of electric vehicles.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a charging voltage control method, device, equipment, storage medium and program product. Background Art

[0002] As the public's environmental awareness gradually increases, electric vehicles are gradually replacing traditional fuel vehicles. Electric vehicles are cheaper than traditional fuel vehicles, the expenses incurred during use are generally lower than traditional vehicles, and they usually have more intelligent services.

[0003] At present, when an electric vehicle is charged using a charging pile, a fixed voltage value is usually used to instruct the charging pile to output voltage to achieve charging.

[0004] However, current electric vehicles cannot fully utilize the maximum output voltage of the charging pile when charging, resulting in low efficiency. Summary of the invention

[0005] The present application provides a charging voltage control method, device, equipment, storage medium and program product to solve the problem of low charging efficiency of electric vehicles.

[0006] In a first aspect, the present application provides a charging voltage control method, comprising:

[0007] Receive the maximum output voltage value of the charging pile sent by the battery management system, and obtain the battery pack voltage value, wherein the maximum output voltage value of the charging pile is sent to the battery management system through the charging gun when the charging pile detects that the charging gun is inserted; determine the target voltage value of the buck side voltage of the boost unit according to the maximum output voltage value of the charging pile and the battery pack voltage value; adjust the voltage of the buck side of the boost unit to the target voltage value, and when the voltage of the buck side of the boost unit reaches the target voltage value, input the voltage of the buck side of the boost unit into the charging pile, so that the charging pile outputs a charging current after determining that the voltage of the buck side of the boost unit meets the preset requirements.

[0008] In one possible implementation, a target voltage value of the buck-side voltage of the boost unit is determined based on the maximum output voltage value of the charging pile and the battery pack voltage value, including: querying the value range of the buck-side voltage of the boost unit corresponding to the battery pack voltage value in the preset bench calibration data, and determining a first voltage value based on the difference between the maximum output voltage value of the charging pile and a preset fluctuating voltage value, and determining a second voltage value based on the product of the battery pack voltage value and a preset coefficient; and determining the minimum of the maximum value of the value range of the buck-side voltage of the boost unit, the first voltage value, and the second voltage value as the target voltage of the buck-side voltage of the boost unit.

[0009] In one possible implementation, the boost unit includes: a first switch, a second switch, a capacitor and a boost module, the first switch and the capacitor are connected in series and connected to the two ends of the step-down side of the boost module, the two ends of the high-voltage side of the boost module are respectively connected to the battery pack, the input end of the second switch is connected to one end of the capacitor, and the other end of the capacitor and the output end of the second switch are respectively connected to the charging pile; accordingly, the voltage of the step-down side of the boost unit is adjusted to a target voltage value, and when the voltage of the step-down side of the boost unit reaches the target voltage value, the voltage of the step-down side of the boost unit is input into the charging pile, including: sending a first control signal to the battery management system through the boost module so that the battery management system controls the first switch to be closed; charging the capacitor using the battery pack voltage through the boost module so that the voltage of the capacitor reaches the target voltage value; when the voltage of the step-down side of the boost module reaches the target voltage value, sending a second control signal to the battery management system through the boost module so that the battery management system controls the second switch to be closed to input the voltage of the step-down side of the boost module into the charging pile.

[0010] In one possible implementation, after charging the capacitor using the battery pack voltage through the boost module, it also includes: detecting the voltage value of the capacitor after a first preset time to obtain the voltage of the capacitor; if the voltage of the capacitor does not reach the target voltage value, sending fault information to the battery management system, so that the battery management system sends the fault information to the charging pile or the vehicle's screen for display.

[0011] In one possible implementation, after the voltage on the buck side of the boost unit is input into the charging pile, it also includes: receiving a voltage adjustment signal sent by the battery management system, wherein the voltage adjustment signal is generated by the battery management system after sending a current output instruction to the charging pile so that the charging pile outputs current according to a preset current value, detecting the actual output current of the charging pile, and based on a comparison result between the actual output current and the preset current value; adjusting the target voltage value according to the voltage adjustment signal to obtain a new target voltage value, and adjusting the voltage on the buck side of the boost unit to the new target voltage value, and when the voltage on the buck side of the boost unit reaches the new target voltage value, inputting the voltage on the buck side of the boost unit into the charging pile, so that the charging pile outputs a charging current after determining that the new target voltage value meets the preset requirements.

[0012] In one possible implementation, after the buck side voltage of the boost unit is sent to the charging pile, it also includes: receiving high voltage information sent by the battery management system, and reducing the buck side voltage of the boost unit according to the high voltage information, so that the charging pile outputs a charging current after determining that the buck side voltage of the boost unit meets preset requirements, wherein the high voltage information is sent by the charging pile to the battery management system.

[0013] In a second aspect, the present application provides a charging voltage control method, comprising:

[0014] The receiving charging pile sends the maximum output voltage value of the charging pile through the charging gun when the charging pile detects that the charging gun is inserted;

[0015] The maximum output voltage value of the charging pile is sent to the boost unit, so that the boost unit determines the target voltage value of the buck side voltage of the boost unit according to the maximum output voltage value of the charging pile and the acquired battery pack voltage value, adjusts the buck side voltage of the boost unit to the target voltage value, and when the voltage on the buck side of the boost unit reaches the target voltage value, sends the buck side voltage of the boost unit to the charging pile, so that the charging pile outputs the charging current after determining that the buck side voltage of the boost unit meets the preset requirements.

[0016] In one possible implementation, after sending the maximum output voltage value of the charging pile to the boost unit, it also includes: sending a current output instruction to the charging pile so that the charging pile outputs current according to a preset current value; detecting the actual output current of the charging pile, and generating a voltage adjustment signal based on a comparison result between the actual output current and the preset current value; sending a voltage adjustment signal to the boost unit so that the boost unit changes the step-down side voltage of the boost unit according to the voltage adjustment signal to obtain a new step-down side voltage of the boost unit, and sending the new step-down side voltage of the boost unit to the charging pile, wherein the new step-down side voltage of the boost unit is used to instruct the charging pile to output a charging current after determining that the new step-down side voltage of the boost unit meets the preset requirements.

[0017] In one possible implementation, the actual output current of the charging pile is detected, and a voltage adjustment signal is generated based on a comparison result between the actual output current and a preset current value, including: detecting the actual output current of the charging pile after a second preset time; if the actual output current of the charging pile is lower than the preset current value, generating a voltage reduction signal; if the actual output current of the charging pile is greater than or equal to the preset current value, generating a voltage increase signal.

[0018] In one possible implementation, after sending the voltage adjustment signal to the boost unit, it also includes: if the actual output current is less than the preset maximum allowable current value, sending a current output instruction to increase the current to the charging pile, so that the charging pile outputs current according to the current output instruction to increase the current; if the actual output current is greater than the preset maximum allowable current value, sending a current output instruction to reduce the current to the charging pile, so that the charging pile outputs current according to the current output instruction to reduce the current; if the actual output current is equal to the preset maximum allowable current value, no current output instruction is sent to the charging pile.

[0019] In a possible implementation, after sending a current output instruction for reducing the current to the charging pile, the method further includes: if the current value corresponding to the current output instruction for reducing the current is zero, then terminating the charging.

[0020] In a third aspect, the present application provides a charging voltage control device, comprising:

[0021] A value acquisition module is used to receive the maximum output voltage value of the charging pile sent by the battery management system and obtain the battery pack voltage value, wherein the maximum output voltage value of the charging pile is sent to the battery management system by the charging gun when the charging pile detects that the charging gun is inserted;

[0022] A value determination module, used to determine a target voltage value of the buck-side voltage of the boost unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack;

[0023] The first input module is used to adjust the voltage on the buck side of the boost unit to a target voltage value, and when the voltage on the buck side of the boost unit reaches the target voltage value, input the voltage on the buck side of the boost unit into the charging pile, so that the charging pile outputs a charging current after determining that the voltage on the buck side of the boost unit meets preset requirements.

[0024] In a fourth aspect, the present application provides a charging voltage control device, comprising:

[0025] A value receiving module, used to receive the maximum output voltage value of the charging pile sent by the charging gun when the charging pile detects that the charging gun is inserted;

[0026] The first sending module is used to send the maximum output voltage value of the charging pile to the boost unit, so that the boost unit determines the target voltage value of the buck side voltage of the boost unit according to the maximum output voltage value of the charging pile and the acquired battery pack voltage value, adjusts the buck side voltage of the boost unit to the target voltage value, and when the voltage on the buck side of the boost unit reaches the target voltage value, sends the buck side voltage of the boost unit to the charging pile, so that the charging pile outputs the charging current after determining that the buck side voltage of the boost unit meets the preset requirements.

[0027] In a fifth aspect, the present application provides an electronic device, comprising: a processor, and a memory connected to the processor for communication; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the charging voltage control method as described in the first aspect above.

[0028] In a sixth aspect, the present application provides an electronic device comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the charging voltage control method as described in the second aspect above.

[0029] In a seventh aspect, the present application provides a computer-readable storage medium, in which computer execution instructions are stored. When the computer execution instructions are executed by a processor, they are used to implement the charging voltage control method of the first aspect mentioned above.

[0030] In an eighth aspect, the present application provides a computer-readable storage medium, in which computer execution instructions are stored. When the computer execution instructions are executed by a processor, they are used to implement the charging voltage control method of the second aspect mentioned above.

[0031] In a ninth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the charging voltage control method of the first aspect.

[0032] In a tenth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the charging voltage control method of the second aspect.

[0033] The charging voltage control method, device, equipment, storage medium and program product provided in the present application obtain the current battery pack voltage and the maximum output voltage of the charging pile, determine the voltage value with the highest charging efficiency that the charging pile needs to output, and send this appropriate voltage value to the charging pile, so that the charging pile outputs the corresponding current, thereby improving the charging efficiency of the electric vehicle battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0035] Figure 1 A schematic diagram of an application scenario of the charging voltage control method provided in an embodiment of the present application;

[0036] Figure 2 Schematic diagram of the charging voltage control method provided in the embodiment of the present application Figure 1 ;

[0037] Figure 3 Schematic diagram of the charging voltage control method provided in the embodiment of the present application Figure 2 ;

[0038] Figure 4 A schematic diagram of an interactive flow chart of a charging voltage control method provided in an embodiment of the present application;

[0039] Figure 5 A charging voltage control device provided in an embodiment of the present application is shown in FIG. Figure 1 ;

[0040] Figure 6 A charging voltage control device provided in an embodiment of the present application is shown in FIG. Figure 2 ;

[0041] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0042] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0043] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0044] With the improvement of public environmental awareness and the support of various funds, new energy vehicles are developing rapidly. Among new energy vehicles, electric vehicles are developing the fastest. With lower prices, lower operating costs and various additional intelligent services, they are gradually taking over the market of traditional vehicles.

[0045] Nowadays, electric vehicles are usually powered by charging piles. When the electric vehicle is connected to the charging pile through a charging gun, the electric vehicle instructs the charging pile to output current at a preset voltage for charging. However, since the voltage is preset and fixed, the maximum output capacity of the charging pile cannot be fully utilized, resulting in low charging efficiency.

[0046] In response to the above problems, this application provides the following technical ideas: by simultaneously considering the maximum output voltage of the charging pile and the current voltage value of the battery, the voltage value output by the charging pile is within the voltage output capacity of the charging pile and is suitable for the current battery pack voltage, thereby achieving improved charging efficiency.

[0047] Figure 1 Schematic diagram of application scenario of the charging voltage control method provided in the embodiment of the present application. Figure 1 In this scenario, it includes: a boost unit 101, a battery management system 102, a battery pack 103 and a charging pile 200.

[0048] In a specific implementation process, the boost unit 101 may be composed of a first switch 1011, a second switch 1012, a capacitor 1013 and a boost module 1014, and the boost module may be composed of a boost circuit or a boost circuit and a processor, wherein the boost circuit is, for example, a boost (power increase) circuit. The present application does not limit the specific specifications of the first switch 1011, the second switch 1012 and the capacitor 1013.

[0049] The battery management system (BMS) 102 may be composed of a variety of components including sensors, voltage acquisition circuits, current acquisition circuits, processors, main control boards, and communication modules, and may also be replaced by a battery energy control module (BECM).

[0050] The battery pack 103 may be a battery pack composed of any number of batteries, or may be a battery module.

[0051] The charging pile 200 can be any charging pile.

[0052] The boost unit 101 is used to obtain the voltage value of the battery pack 103, determine the target voltage value of the buck-side voltage of the boost unit 101, adjust the buck-side voltage of the boost unit 101, and input the buck-side voltage to the charging pile.

[0053] The battery management system 102 is used to obtain the maximum output voltage value of the charging pile and send the maximum output voltage value of the charging pile to the boost unit 101.

[0054] The charging pile 200 is used to output a corresponding current according to the voltage on the step-down side.

[0055] It is understandable that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the charging voltage control method. In other feasible implementations of the present application, the above architecture may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange the components differently, which can be determined according to the actual application scenario and is not limited here. Figure 1 The components shown may be implemented in hardware, software, or a combination of software and hardware.

[0056] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0057] Figure 2 Schematic diagram of the charging voltage control method provided in the embodiment of the present application Figure 1 The execution subject of the embodiment of the present application may be Figure 1 The boost unit 101 in FIG. Figure 2 As shown, the method includes:

[0058] S201: Receive the maximum output voltage value of the charging pile sent by the battery management system, and obtain the battery pack voltage value, wherein the maximum output voltage value of the charging pile is sent to the battery management system through the charging gun when the charging pile detects that the charging gun is inserted.

[0059] In this step, the received maximum output voltage value of the charging pile can be in any format that the boost unit can recognize, such as a message format. The battery pack voltage value can be obtained by measurement or by receiving the battery pack's own voltage value sent by the battery pack. This application does not impose any special restrictions on this.

[0060] S202: Determine a target voltage value of the buck-side voltage of the boost unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack.

[0061] In this step, the step-down side of the boost unit can be the side of the boost unit close to the charging pile. The target voltage value can be less than the maximum output voltage value of the charging pile, and can also be less than the battery pack voltage value, so that the target voltage value can achieve the highest possible power charging of the battery pack after the boost unit is boosted.

[0062] For example, if the current maximum output voltage value of the charging pile is 400V, and the current battery pack voltage value is 450V, the target voltage value can be set to 390V or 400V.

[0063] S203: Adjust the voltage on the buck side of the boost unit to a target voltage value, and when the voltage on the buck side of the boost unit reaches the target voltage value, input the voltage on the buck side of the boost unit into the charging pile, so that the charging pile outputs a charging current after determining that the voltage on the buck side of the boost unit meets preset requirements.

[0064] In one possible implementation, Figure 1 As shown, the boost unit includes: a first switch, a second switch, a capacitor and a boost module. The first switch and the capacitor are connected in series and connected to the two ends of the step-down side of the boost module. The two ends of the high-voltage side of the boost module are respectively connected to the battery pack. The input end of the second switch is connected to one end of the capacitor, and the other end of the capacitor and the output end of the second switch are respectively connected to the charging pile.

[0065] Accordingly, in the above step S203, the voltage of the buck side of the boost unit is adjusted to the target voltage value, and when the voltage of the buck side of the boost unit reaches the target voltage value, the voltage of the buck side of the boost unit is input into the charging pile, which specifically includes:

[0066] S2031: Send a first control signal to the battery management system through the boost module, so that the battery management system controls the first switch to close.

[0067] In this step, the boost module sends a first control signal to the battery management system, which may be sent to the battery management system in a message format. The first control signal may be used to inform the battery management system that the first switch needs to be controlled to close.

[0068] S2032: Using the battery pack voltage to charge the capacitor through the boost module so that the voltage of the capacitor reaches a target voltage value.

[0069] In this step, the boost module uses the battery pack voltage to charge the capacitor by conducting the capacitor and the battery pack to form a parallel relationship, and controls the voltage so that the capacitor is charged to reach a target voltage value.

[0070] S2033: When the voltage on the buck side of the boost module reaches the target voltage value, a second control signal is sent to the battery management system through the boost module, so that the battery management system controls the second switch to close to input the voltage on the buck side of the boost module into the charging pile.

[0071] In this step, the second control signal is similar to the first control signal in the above step S2031, and will not be described in detail here. The second switch is closed to connect the capacitor in parallel with the charging pile, so that the voltage on the buck side of the boost module is input into the charging pile.

[0072] From the description of the above embodiments, it can be seen that the embodiments of the present application obtain the current battery pack voltage and the maximum output voltage of the charging pile, determine the voltage value with the highest charging efficiency that the charging pile needs to output, and send this appropriate voltage value to the charging pile, so that the charging pile outputs the corresponding current, thereby improving the charging efficiency of the electric vehicle battery.

[0073] In a possible implementation, after the voltage of the step-down side of the boost unit is input into the charging pile in the step S203, the method further includes: receiving voltage failure information sent by the charging pile, and terminating charging.

[0074] The voltage failure information may be sent after the charging pile determines that the voltage on the step-down side of the boost unit cannot be used as the output voltage of the charging pile.

[0075] In a possible implementation, in the above step S202, determining the target voltage value of the buck-side voltage of the boost unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack specifically includes:

[0076] S2021: In the preset bench calibration data, query the value range of the buck side voltage of the boost unit corresponding to the battery pack voltage value, and determine the first voltage value according to the difference between the maximum output voltage value of the charging pile and the preset fluctuating voltage value, and determine the second voltage value according to the product of the battery pack voltage value and the preset coefficient.

[0077] In this step, the preset bench calibration data contains the corresponding relationship between the battery pack voltage and the range of suitable charging voltage. The preset fluctuating voltage value can be empirical data measured experimentally or data set by the electric vehicle user, and this application does not impose specific restrictions on this. The difference between the maximum output voltage value of the charging pile and the preset fluctuating voltage value is the value obtained by subtracting the preset fluctuating voltage value from the maximum output voltage value of the charging pile, and the first voltage value should be less than or equal to the above difference.

[0078] The preset coefficient can be obtained by the following formula:

[0079] K<(1-(T1+T2+T3)*F)

[0080] Among them, K is a preset coefficient, T1 is the dead time of the boost module in the boost unit, T2 is the turn-on time of the boost module in the boost unit, T3 is the minimum turn-on time of the boost module in the boost unit, and F is the switching frequency.

[0081] The second voltage value is a value less than the product of the battery pack voltage value and the preset coefficient, and the second voltage value can be taken as the maximum value as possible.

[0082] Specifically, the preset bench calibration data is, for example, if the maximum output voltage value of the charging pile is 500V, the fluctuation voltage value is 25V, then the first voltage value is less than or equal to 475V. If the above T1 is 3μs, T2 is 1μs, T3 is 2μs, and F is 1 / 100μs, then the above coefficient K is less than 94%.

[0083] S2022: Determine the smallest one of the maximum value of the value range of the buck-side voltage of the boost unit, the first voltage value, and the second voltage value as the target voltage of the buck-side voltage of the boost unit.

[0084] For example, if the voltage on the step-down side of the boost unit ranges from 200V to 400V, the maximum value of the first voltage value is 230V, and the maximum value of the second voltage value is 300V, the target voltage value can be determined as 230V, 229V, or 229.5V. If the voltage on the step-down side of the boost unit ranges from 300V to 400V, the maximum value of the first voltage value is 430V, and the maximum value of the second voltage value is 500V, the target voltage value can be determined as 400V. If the voltage on the step-down side of the boost unit ranges from 350V to 450V, the maximum value of the first voltage value is 300V, and the maximum value of the second voltage value is 400V, the target voltage value can be determined as 300V, 299V, or 299.5V.

[0085] It can be seen from the description of the above embodiments that by comparing the value range of the buck-side voltage of the boost unit, the first voltage value and the second voltage value, a maximum target voltage value that meets the requirements of the three can be selected.

[0086] In a possible implementation, the above step S202 can also be: determine a candidate voltage selection range based on the first voltage value and the second voltage value, then search for the voltage value with the highest charging efficiency in the candidate voltage selection range in the preset test bench calibration data, and determine the voltage value with the highest charging efficiency in the candidate voltage selection range as the target voltage value of the buck side voltage of the boost unit.

[0087] Among them, determining the candidate voltage selection range according to the first voltage value and the second voltage value may include: taking the smaller voltage value of the first voltage value and the second voltage value as the maximum value of the candidate voltage selection range, and determining zero as the minimum value of the candidate voltage selection range.

[0088] In a possible implementation, after the capacitor is charged by the boost module using the battery pack voltage in step S2032, the step further includes:

[0089] S204A: Detecting a voltage value of the capacitor after a first preset time to obtain the voltage of the capacitor.

[0090] Specifically, the first preset time, such as 200ms, 250ms or 300ms, etc., can be set according to experience.

[0091] S205A: If the voltage of the capacitor does not reach the target voltage value, a fault message is sent to the battery management system, so that the battery management system sends the fault message to the charging pile or the vehicle screen for display.

[0092] In this step, the fault information can be in a message format or in other formats, as long as it can be displayed on the screen of the charging pile or the vehicle. The content of the fault information can be "charging failure" or "charging preparation failure", etc., and this application does not impose any special restrictions on this.

[0093] It can be seen from the description of the above embodiments that the embodiments of the present application can prompt the user that a fault occurs during the charging process by sending a fault message after charging fails.

[0094] In a possible time mode, in the above step S204A, the voltage of the capacitor is obtained, and it is confirmed that the voltage of the capacitor has not reached the target voltage value. The capacitor can be recharged and steps S204A and S205A are performed again.

[0095] In a possible implementation, after the step S203 inputs the voltage of the step-down side of the boost unit into the charging pile, the following further steps are included:

[0096] S204B: Receive a voltage adjustment signal sent by the battery management system, wherein the voltage adjustment signal is generated by the battery management system after sending a current output instruction to the charging pile so that the charging pile outputs current according to a preset current value, detecting the actual output current of the charging pile, and based on a comparison result between the actual output current and the preset current value.

[0097] In this step, the voltage adjustment signal includes a voltage reduction signal or a voltage increase signal.

[0098] S205B: Adjust the target voltage value according to the voltage adjustment signal to obtain a new target voltage value, and adjust the voltage on the buck side of the boost unit to the new target voltage value, and when the voltage on the buck side of the boost unit reaches the new target voltage value, input the voltage on the buck side of the boost unit into the charging pile, so that the charging pile outputs a charging current after determining that the new target voltage value meets the preset requirements.

[0099] In this step, if the voltage adjustment signal is a voltage reduction signal, the target voltage value is reduced, and if the voltage adjustment signal is a voltage increase signal, the target voltage value is increased. The process of inputting the voltage of the step-down side of the boost unit to the charging pile is the same as in the above step S203, and will not be repeated here.

[0100] Specifically, the target voltage value may be lowered or increased by a preset value or a preset ratio. Both the preset value and the preset ratio may be set in advance, and this application does not limit this.

[0101] For example, if the current target voltage value is 400V, when the voltage adjustment signal is a voltage reduction signal, the target voltage value is reduced by 10V to 390V, or the target voltage value is reduced by 5% to 380V. If the current target voltage value is 400V, when the voltage adjustment signal is a voltage increase signal, the target voltage value is increased by 10V to 410V, or the target voltage value is increased by 5% to 420V.

[0102] From the description of the above embodiments, it can be seen that the embodiments of the present application can adjust the target voltage value by receiving the voltage adjustment signal, and further adjust the voltage on the buck side of the boost unit, thereby achieving precise control of the voltage, which is beneficial to improving the charging efficiency.

[0103] In a possible implementation, after sending the step-down side voltage of the boost unit to the charging pile, step S203 further includes:

[0104] S204C: Receive the voltage over-high information sent by the battery management system, and reduce the buck-side voltage of the boost unit according to the voltage over-high information, so that the charging pile outputs the charging current after determining that the buck-side voltage of the boost unit meets the preset requirements, wherein the voltage over-high information is sent by the charging pile to the battery management system.

[0105] In this step, after receiving the voltage-over-high information, the boost unit can reduce the buck-side voltage of the boost unit according to a preset value or a preset ratio. The reduction method is similar to the above step S205B and will not be repeated here.

[0106] From the description of the above embodiments, it can be seen that the embodiments of the present application can achieve the effect of reducing the voltage to increase the current when the voltage is too high and the current is insufficient, and the charging efficiency can be improved by adjusting the voltage to control the current value.

[0107] In a possible implementation, after the target voltage value is changed according to the voltage adjustment signal to obtain a new target voltage value in step S205B, the following further includes:

[0108] S206B: Receiving the end-charging instruction sent by the battery management system to disconnect the first switch and the second switch, wherein the end-charging instruction is that the battery management system sends a current output instruction to the charging pile, so that the charging pile outputs current according to a preset current value, detects the actual output current of the charging pile, and generates a voltage adjustment signal based on the comparison result of the actual output current and the preset current value, and sends a new current output instruction to the charging pile based on the actual output current of the charging pile and the preset maximum allowable current value, and outputs when the current value corresponding to the new current output instruction is zero.

[0109] Figure 3 Schematic diagram of the charging voltage control method provided in the embodiment of the present application Figure 2 The execution subject of the embodiment of the present application may be Figure 1 The battery management system 102 in FIG. Figure 3 As shown, the method includes:

[0110] S301: Receive the maximum output voltage value of the charging pile sent by the charging gun when the charging pile detects that the charging gun is inserted.

[0111] In this step, the maximum output voltage value of the charging pile may be in a message format, and may indicate the upper limit of the voltage output of the charging pile.

[0112] S302: Send the maximum output voltage value of the charging pile to the boost unit, so that the boost unit determines the target voltage value of the buck side voltage of the boost unit according to the maximum output voltage value of the charging pile and the acquired battery pack voltage value, adjusts the buck side voltage of the boost unit to the target voltage value, and when the buck side voltage of the boost unit reaches the target voltage value, sends the buck side voltage of the boost unit to the charging pile, so that the charging pile outputs the charging current after determining that the buck side voltage of the boost unit meets the preset requirements.

[0113] In this step, the maximum output voltage value of the charging pile is sent to the boost unit in a message format.

[0114] From the description of the above embodiments, it can be seen that the embodiments of the present application can achieve the purpose of the boost unit determining a suitable target voltage value of the buck side voltage of the boost unit according to the maximum output voltage of the charging pile and the battery voltage by receiving the maximum output voltage value sent by the charging pile and sending the maximum output voltage value of the charging pile to the boost unit, thereby solving the problem of low efficiency caused by letting the charging pile output a fixed voltage value.

[0115] In a possible implementation, after the maximum output voltage value of the charging pile is sent to the boost unit in step S302, the method further includes:

[0116] S303: Sending a current output instruction to the charging pile so that the charging pile outputs current according to a preset current value.

[0117] In this step, the current output instruction may include a preset current value and an instruction to output current according to the preset current value.

[0118] Specifically, the preset current value may be 16A, 32A or 65A, etc. This application does not impose any specific limitation on this, and an empirical value may be used.

[0119] S304: Detect the actual output current of the charging pile, and generate a voltage adjustment signal according to a comparison result between the actual output current and a preset current value.

[0120] In a possible implementation, this step specifically includes:

[0121] S3041: Detecting the actual output current of the charging pile after a second preset time.

[0122] In this step, the second preset time may be 200 ms, 250 ms or 300 ms, etc., and this application does not impose any special limitation on this.

[0123] S3042: If the actual output current of the charging pile is lower than the preset current value, a voltage reduction signal is generated.

[0124] In this step, the voltage reduction signal may be used to instruct the boost unit to reduce the voltage on the buck side of the boost unit, wherein reducing the voltage on the buck side of the boost unit may be by a preset voltage value or a preset ratio.

[0125] S3043: If the actual output current of the charging pile is greater than or equal to the preset current value, a voltage increase signal is generated.

[0126] In this step, the voltage increase signal may be used to instruct the boost unit to increase the voltage on the step-down side of the boost unit, wherein increasing the voltage on the step-down side of the boost unit may be increased according to a preset voltage value or a preset ratio.

[0127] In this step, if the actual output current is lower than the preset current value, the generated voltage adjustment signal can be a voltage adjustment signal for reducing the voltage; if the actual output current is equal to or higher than the preset current value, the generated voltage adjustment signal can be a voltage adjustment signal for increasing the voltage.

[0128] S305: Send a voltage adjustment signal to the boost unit so that the boost unit changes the buck-side voltage of the boost unit according to the voltage adjustment signal, obtains a new buck-side voltage of the boost unit, and sends the new buck-side voltage of the boost unit to the charging pile, wherein the new buck-side voltage of the boost unit is used to instruct the charging pile to output a charging current after determining that the new buck-side voltage of the boost unit meets preset requirements.

[0129] In this step, the voltage adjustment signal may include the current output voltage value of the charging pile, and may also include a voltage reduction or increase signal.

[0130] From the above description of the embodiment, it can be seen that the embodiment of the present application can detect the current output of the charging pile and dynamically adjust the voltage value output by the charging pile, so that the voltage value output by the charging pile can reach the maximum value while ensuring the current. Avoid the situation where the maximum output voltage of the charging pile is not fully utilized due to inaccurate calibration of the maximum output voltage of the charging pile. At the same time, detecting the actual output current of the charging pile after the second preset time can avoid the situation where the relationship between the charging pile current and the preset current value is misjudged when the charging pile fails to adjust the output current in time.

[0131] In a possible implementation, after sending the voltage adjustment signal to the boost unit, step S305 further includes:

[0132] S306A: If the actual output current is less than the preset maximum allowable current value, a current output instruction for increasing the current is sent to the charging pile, so that the charging pile outputs the current according to the current output instruction for increasing the current.

[0133] In this step, the preset maximum allowable current can be the minimum of the maximum output current that the charging pile can reach, the maximum withstand current of the boost unit, and the maximum withstand current of the battery pack. The maximum withstand current of the battery pack can be obtained by pre-determination. Different battery pack voltages have different maximum withstand currents. The current corresponding to the maximum withstand current of the battery pack before boosting can also be determined by the conversion relationship between the current after boosting and the current before boosting, where the conversion relationship can be measured in advance. The current output instruction for increasing the current can include a current value greater than the actual output current, a current value greater than the preset value of the actual output current, and an increase in the output current.

[0134] S306B: If the actual output current is greater than the preset maximum allowable current value, a current output instruction for reducing the current is sent to the charging pile, so that the charging pile outputs the current according to the current output instruction for reducing the current.

[0135] In this step, the current output instruction for reducing the current may include a current value smaller than the actual output current, may include a current value smaller than a preset value of the actual output current, and may also include a reduction amount of the output current.

[0136] S306C: If the actual output current is equal to the preset maximum allowable current value, no current output instruction is sent to the charging pile.

[0137] In this step, no current output instruction is sent to the charging pile, indicating that the actual output current value is maintained.

[0138] From the description of the above embodiments, it can be seen that the embodiments of the present application can determine whether the current value needs to be increased or decreased by comparing the actual output current with the preset maximum allowable current value. If the current value can be increased, the charging efficiency can be further improved.

[0139] In a possible implementation, after sending a new current output instruction to the charging pile, step S306 further includes:

[0140] S307: If the current value corresponding to the new current output instruction is zero, charging is terminated.

[0141] In this step, as the battery voltage gradually increases, the preset maximum allowable current will gradually decrease, and when the battery is fully charged, the maximum allowable current value drops to zero. Charging can be terminated by controlling the first switch and the second switch in the boost unit to be disconnected.

[0142] Figure 4 This is a schematic diagram of the interactive flow of the charging voltage control method provided in the embodiment of the present application. This embodiment describes the overall charging process, such as Figure 4 As shown, the interactive process of the charging voltage control method includes the following steps:

[0143] S401: The battery management system obtains the maximum voltage value of the charging pile and the battery pack voltage value, and sends the maximum voltage value and the battery pack voltage to the boost unit. This step corresponds to the above step S201.

[0144] S402: The boost unit determines a target voltage value of the buck-side voltage of the boost unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack.

[0145] This step corresponds to the above-mentioned step S202.

[0146] S403: The boost module in the boost unit sends a first control signal to the battery management system, so that the battery management system controls the first switch to close, and uses the battery pack voltage to charge the capacitor so that the voltage of the capacitor reaches the target voltage value.

[0147] This step corresponds to the above-mentioned step S2031 and step S2032.

[0148] S404: The boost unit detects the voltage value of the capacitor to obtain the voltage of the capacitor.

[0149] S405: The boost unit determines whether the voltage of the capacitor reaches the target voltage value. If not, proceed to step S406; if reached, proceed to step S407.

[0150] S406: Sending fault information to the battery management system, so that the battery management system sends the fault information to the charging pile or the vehicle screen for display.

[0151] This step corresponds to the above-mentioned step S205A.

[0152] S407: The boost unit sends a second control signal to the battery management system, so that the battery management system controls the second switch to close to input the voltage of the step-down side of the boost module into the charging pile.

[0153] This step corresponds to the above step S2033. Step S408 is performed after step S407.

[0154] S408: The charging pile determines whether the voltage meets the requirements. If not, proceed to step S409 and then step S407. If it meets the requirements, proceed to step S410.

[0155] S409: The charging pile sends the voltage-over-high information to the battery management system, and the battery management system sends the voltage-over-high information to the boost unit, so that the boost unit reduces the voltage on the buck side.

[0156] Steps S408 and S409 correspond to the above-mentioned step S204C.

[0157] S410: The battery management system sends a current output instruction to the charging pile, so that the charging pile outputs current according to a preset current value.

[0158] This step corresponds to the above step S303. After the charging pile outputs current according to the preset current value in step S410, step S411 is executed.

[0159] S411: The battery management system determines whether the actual output current reaches the preset current value. If it reaches the preset current value, step S412 is executed; if it does not reach the preset current value, step S413 is executed.

[0160] S412: The battery management system generates a voltage increase signal.

[0161] S413: The battery management system generates a voltage reduction signal.

[0162] The above steps S411, S412, and S413 correspond to the above step S305. Step S414 is performed after step S413.

[0163] S414: The battery management system determines the relationship between the actual output current and the maximum allowable current value. If the output current is greater than the maximum allowable current value, step S415 is executed; if the output current is less than the maximum allowable current value, step S416 is executed.

[0164] S415: The battery management system sends a current output instruction to reduce the current to the charging pile.

[0165] After step S415, execute step S417.

[0166] S416: The battery management system sends a current output instruction to increase the current to the charging pile.

[0167] The above steps S414, S415, and S416 correspond to the above steps S306A and S306B.

[0168] S417: The battery management system determines whether the current value corresponding to the current output instruction for reducing the current is zero. If it is zero, step S418 is executed, and if it is not zero, the above step S414 is executed again.

[0169] S418: End charging.

[0170] Steps S417 and S418 correspond to the above-mentioned step S307.

[0171] Figure 5 A charging voltage control device provided in an embodiment of the present application is shown in FIG. Figure 1 .like Figure 5As shown, the charging voltage control device 500 includes: a value acquisition module 501 , a value determination module 502 and a first input module 503 .

[0172] The value acquisition module 501 is used to receive the maximum output voltage value of the charging pile sent by the battery management system and obtain the battery pack voltage value, wherein the maximum output voltage value of the charging pile is sent to the battery management system by the charging gun when the charging pile detects that the charging gun is inserted;

[0173] A value determination module 502 is used to determine a target voltage value of the buck-side voltage of the boost unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack;

[0174] The first input module 503 is used to adjust the voltage on the buck side of the boost unit to a target voltage value, and when the voltage on the buck side of the boost unit reaches the target voltage value, input the voltage on the buck side of the boost unit into the charging pile, so that the charging pile outputs a charging current after determining that the voltage on the buck side of the boost unit meets preset requirements.

[0175] In a possible implementation, the value determination module 502 is specifically used to query the value range of the step-down side voltage of the boost unit corresponding to the battery pack voltage value in the preset bench calibration data, and determine the first voltage value according to the difference between the maximum output voltage value of the charging pile and the preset fluctuation voltage value, and determine the second voltage value according to the product of the battery pack voltage value and the preset coefficient. The minimum of the maximum value of the step-down side voltage range of the boost unit, the first voltage value, and the second voltage value is determined as the target voltage of the step-down side voltage of the boost unit.

[0176] In one possible implementation, the boost unit includes: a first switch, a second switch, a capacitor and a boost module, the first switch and the capacitor are connected in series and connected to the two ends of the step-down side of the boost module, the two ends of the high-voltage side of the boost module are respectively connected to the battery pack, the input end of the second switch is connected to one end of the capacitor, and the other end of the capacitor and the output end of the second switch are respectively connected to the charging pile. The voltage input module 503 is specifically used to send a first control signal to the battery management system through the boost module so that the battery management system controls the first switch to close. The capacitor is charged using the battery pack voltage through the boost module so that the voltage of the capacitor reaches the target voltage value. When the voltage on the step-down side of the boost module reaches the target voltage value, a second control signal is sent to the battery management system through the boost module so that the battery management system controls the second switch to close to input the voltage on the step-down side of the boost module into the charging pile.

[0177] Continue to refer Figure 5 In a possible implementation, the charging voltage control device 500 further includes: a voltage obtaining module 504 and a second sending module 505 .

[0178] The voltage obtaining module 504 is used to detect the voltage value of the capacitor after the first preset time to obtain the voltage of the capacitor.

[0179] The second sending module 505 is used to send fault information to the battery management system if the voltage of the capacitor does not reach the target voltage value, so that the battery management system sends the fault information to the charging pile or the vehicle screen for display.

[0180] Continue to refer Figure 5 In a possible implementation, the charging voltage control device 500 further includes: a third sending module 506 and a second input module 507 .

[0181] The third sending module 506 is used to receive a voltage adjustment signal sent by the battery management system, wherein the voltage adjustment signal is generated by the battery management system after sending a current output instruction to the charging pile so that the charging pile outputs current according to a preset current value, detecting the actual output current of the charging pile, and based on the comparison result between the actual output current and the preset current value.

[0182] The second input module 507 is used to adjust the target voltage value according to the voltage adjustment signal to obtain a new target voltage value, and adjust the voltage on the buck side of the boost unit to the new target voltage value, and when the voltage on the buck side of the boost unit reaches the new target voltage value, input the voltage on the buck side of the boost unit into the charging pile, so that the charging pile outputs a charging current after determining that the new target voltage value meets the preset requirements.

[0183] Continue to refer Figure 5 In a possible implementation, the charging voltage control device 500 further includes: a voltage reduction module 508 .

[0184] The voltage reduction module 508 is used to receive the voltage over-high information sent by the battery management system, and reduce the buck-side voltage of the boost unit according to the voltage over-high information, so that the charging pile outputs the charging current after determining that the buck-side voltage of the boost unit meets the preset requirements, wherein the voltage over-high information is sent by the charging pile to the battery management system.

[0185] The device provided in this embodiment can be used to execute the technical solution of the above method embodiment. Its implementation principle and technical effect are similar, and this embodiment will not be repeated here.

[0186] Figure 6 A charging voltage control device provided in an embodiment of the present application is shown in FIG. Figure 2 .like Figure 6 As shown, the charging voltage control device 600 includes: a value receiving module 601 and a first sending module 602 .

[0187] The value receiving module 601 is used to receive the maximum output voltage value of the charging pile sent by the charging gun when the charging pile detects that the charging gun is inserted.

[0188] The first sending module 602 is used to send the maximum output voltage value of the charging pile to the boost unit, so that the boost unit determines the target voltage value of the buck side voltage of the boost unit according to the maximum output voltage value of the charging pile and the acquired battery pack voltage value, adjusts the buck side voltage of the boost unit to the target voltage value, and when the voltage on the buck side of the boost unit reaches the target voltage value, sends the buck side voltage of the boost unit to the charging pile, so that the charging pile outputs a charging current after determining that the buck side voltage of the boost unit meets the preset requirements.

[0189] Continue to refer Figure 6 In a possible implementation, the charging voltage control device 600 further includes: a fourth sending module 603 , a first generating module 604 , and a fifth sending module 605 .

[0190] The fourth sending module 603 is used to send a current output instruction to the charging pile, so that the charging pile outputs current according to a preset current value.

[0191] The first generating module 604 is used to detect the actual output current of the charging pile and generate a voltage adjustment signal according to the comparison result between the actual output current and the preset current value.

[0192] The fifth sending module 605 is used to send a voltage adjustment signal to the boost unit so that the boost unit changes the buck side voltage of the boost unit according to the voltage adjustment signal, obtains a new buck side voltage of the boost unit, and sends the new buck side voltage of the boost unit to the charging pile, wherein the new buck side voltage of the boost unit is used to instruct the charging pile to output a charging current after determining that the new buck side voltage of the boost unit meets the preset requirements.

[0193] Continue to refer Figure 6 In a possible implementation, the charging voltage control device 600 further includes: a current detection module 606 , a second generation module 607 , and a third generation module 608 .

[0194] The current detection module 606 is used to detect the actual output current of the charging pile after the second preset time.

[0195] The second generating module 607 is used to generate a voltage reduction signal if the actual output current of the charging pile is lower than a preset current value.

[0196] The third generating module 608 is used to generate a voltage increase signal if the actual output current of the charging pile is greater than or equal to a preset current value.

[0197] Continue to refer Figure 6In a possible implementation, the charging voltage control device 600 further includes: an instruction sending module 609 .

[0198] The instruction sending module 609 is used to send a current output instruction for increasing the current to the charging pile if the actual output current is less than the preset maximum allowable current value, so that the charging pile outputs current according to the current output instruction for increasing the current; if the actual output current is greater than the preset maximum allowable current value, send a current output instruction for reducing the current to the charging pile, so that the charging pile outputs current according to the current output instruction for reducing the current; if the actual output current is equal to the preset maximum allowable current value, no current output instruction is sent to the charging pile.

[0199] Continue to refer Figure 6 In a possible implementation, the charging voltage control device 600 further includes: a charging end module 610 .

[0200] The charging termination module 610 is configured to terminate charging if the current value corresponding to the current output instruction for reducing the current is zero.

[0201] The device provided in this embodiment can be used to execute the technical solution of the above method embodiment. Its implementation principle and technical effect are similar, and this embodiment will not be repeated here.

[0202] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. For example, see Figure 7 As shown, the electronic device 700 may include a processor 701 and a memory 702 communicatively connected to the processor 701 .

[0203] Memory 702 stores computer-executable instructions.

[0204] The processor 701 executes the computer-executable instructions stored in the memory 702 to implement the charging voltage control method provided in any of the above embodiments.

[0205] Optionally, the memory 702 may be independent or integrated with the processor 701. When the memory 702 is a device independent of the processor 701, the electronic device may further include: a bus for connecting the memory 702 and the processor 701.

[0206] The present application also provides a computer-readable storage medium, which stores computer execution instructions. When the processor executes the computer execution instructions, the technical solution of the charging voltage control method in any of the above-mentioned embodiments is implemented. The implementation principle and beneficial effects are similar to those of the charging voltage control method. Please refer to the implementation principle and beneficial effects of the charging voltage control method, which will not be repeated here.

[0207] The present application also provides a computer program product, including a computer program. When the computer program is executed by a processor, it implements the technical solution of the charging voltage control method in any of the above-mentioned embodiments. Its implementation principle and beneficial effects are similar to the implementation principle and beneficial effects of the charging voltage control method. Please refer to the implementation principle and beneficial effects of the charging voltage control method, and no further details will be given here.

[0208] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules is only a logical function division, and there may be other division methods in actual implementation, such as multiple modules can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or modules, which can be electrical, mechanical or other forms.

[0209] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to implement the solution of this embodiment.

[0210] In addition, each functional module in each embodiment of the present application can be integrated into one processing unit, or each module can exist physically separately, or two or more modules can be integrated into one unit. The above-mentioned module-composed unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

[0211] The above-mentioned integrated module implemented in the form of a software function module can be stored in a computer-readable storage medium. The above-mentioned software function module is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform some steps of the methods of various embodiments of the present application.

[0212] It should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the invention may be directly implemented as being executed by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor.

[0213] The memory may include a high-speed RAM memory, and may also include a non-volatile storage NVM, such as at least one disk memory, and may also be a USB flash drive, a mobile hard disk, a read-only memory, a magnetic disk or an optical disk, etc.

[0214] The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0215] The above storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The storage medium can be any available medium that can be accessed by a general or special purpose computer.

[0216] An exemplary storage medium is coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the storage medium can also exist as discrete components in an electronic device or a main control device.

[0217] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0218] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0219] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A charging voltage control method, characterized in that: Applicable to booster units, including: Receive the maximum output voltage value of the charging pile sent by the battery management system, and obtain the battery pack voltage value, wherein the maximum output voltage value of the charging pile is sent to the battery management system by the charging gun when the charging pile detects that the charging gun is inserted; Determining a target voltage value of the buck-side voltage of the boost unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack; Adjusting the voltage of the buck side of the boost unit to the target voltage value, and when the voltage of the buck side of the boost unit reaches the target voltage value, inputting the voltage of the buck side of the boost unit to the charging pile, so that the charging pile outputs a charging current after determining that the voltage of the buck side of the boost unit meets a preset requirement; The boost unit includes: a first switch, a second switch, a capacitor and a boost module, the first switch and the capacitor are connected in series and connected to the two ends of the step-down side of the boost module, the two ends of the high-voltage side of the boost module are respectively connected to the battery pack, the input end of the second switch is connected to one end of the capacitor, and the other end of the capacitor and the output end of the second switch are respectively connected to the charging pile; Accordingly, adjusting the voltage of the buck side of the boost unit to the target voltage value, and when the voltage of the buck side of the boost unit reaches the target voltage value, inputting the voltage of the buck side of the boost unit into the charging pile, comprises: Sending a first control signal to the battery management system through the boost module, so that the battery management system controls the first switch to be closed; Using the battery pack voltage to charge the capacitor through the boost module, so that the voltage of the capacitor reaches the target voltage value; When the voltage on the buck side of the boost module reaches the target voltage value, a second control signal is sent to the battery management system through the boost module, so that the battery management system controls the second switch to close to input the voltage on the buck side of the boost module into the charging pile.

2. The method according to claim 1, characterized in that The step of determining a target voltage value of the buck-side voltage of the boost unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack includes: In the preset bench calibration data, query the value range of the step-down side voltage of the boost unit corresponding to the battery pack voltage value, and determine the first voltage value according to the difference between the maximum output voltage value of the charging pile and the preset fluctuation voltage value, and determine the second voltage value according to the product of the battery pack voltage value and a preset coefficient; A minimum one of a maximum value of a value range of the buck-side voltage of the boost unit, the first voltage value, and the second voltage value is determined as a target voltage of the buck-side voltage of the boost unit.

3. The method according to claim 1, characterized in that After the capacitor is charged by the boost module using the battery pack voltage, the method further includes: After a first preset time, detecting a voltage value of the capacitor to obtain the voltage of the capacitor; If the voltage of the capacitor does not reach the target voltage value, fault information is sent to the battery management system, so that the battery management system sends the fault information to the charging pile or the vehicle screen for display.

4. The method according to any one of claims 1 to 3, characterized in that After the voltage of the step-down side of the boost unit is input into the charging pile, the method further includes: Receiving a voltage adjustment signal sent by the battery management system, wherein the voltage adjustment signal is generated by the battery management system after sending a current output instruction to the charging pile so that the charging pile outputs current according to a preset current value, detecting an actual output current of the charging pile, and comparing the actual output current with a preset current value; The target voltage value is adjusted according to the voltage adjustment signal to obtain a new target voltage value, and the voltage on the buck side of the boost unit is adjusted to the new target voltage value. When the voltage on the buck side of the boost unit reaches the new target voltage value, the voltage on the buck side of the boost unit is input into the charging pile, so that the charging pile outputs a charging current after determining that the new target voltage value meets the preset requirements.

5. The method according to any one of claims 1 to 3, characterized in that After sending the step-down side voltage of the boost unit to the charging pile, the method further includes: Receive the over-voltage information sent by the battery management system, and reduce the buck-side voltage of the boost unit according to the over-voltage information, so that the charging pile outputs the charging current after determining that the buck-side voltage of the boost unit meets the preset requirements, wherein the over-voltage information is sent by the charging pile to the battery management system.

6. A charging voltage control method, characterized in that: Applications in battery management systems, including: Receiving a maximum output voltage value of the charging pile sent by the charging gun when the charging pile detects that the charging gun is inserted; The maximum output voltage value of the charging pile is sent to the boost unit, so that the boost unit determines the target voltage value of the buck side voltage of the boost unit according to the maximum output voltage value of the charging pile and the acquired battery pack voltage value, adjusts the buck side voltage of the boost unit to the target voltage value, and when the buck side voltage of the boost unit reaches the target voltage value, sends the buck side voltage of the boost unit to the charging pile, so that the charging pile outputs a charging current after determining that the buck side voltage of the boost unit meets the preset requirements; the boost unit includes: a first switch, a second switch, a capacitor and a boost module, the first switch and the capacitor are connected in series and connected to the two ends of the buck side of the boost module, the two ends of the high voltage side of the boost module are respectively connected to the battery pack, the input end of the second switch is connected to one end of the capacitor, and the other end of the capacitor and the output end of the second switch are respectively connected to the charging pile; Accordingly, adjusting the voltage of the buck side of the boost unit to the target voltage value, and when the voltage of the buck side of the boost unit reaches the target voltage value, inputting the voltage of the buck side of the boost unit into the charging pile, comprises: Sending a first control signal to the battery management system through the boost module, so that the battery management system controls the first switch to be closed; Using the battery pack voltage to charge the capacitor through the boost module, so that the voltage of the capacitor reaches the target voltage value; When the voltage on the buck side of the boost module reaches the target voltage value, a second control signal is sent to the battery management system through the boost module, so that the battery management system controls the second switch to close to input the voltage on the buck side of the boost module into the charging pile.

7. The method according to claim 6, characterized in that After sending the maximum output voltage value of the charging pile to the boost unit, the method further includes: Sending a current output instruction to the charging pile so that the charging pile outputs current according to a preset current value; Detecting the actual output current of the charging pile, and generating a voltage adjustment signal according to a comparison result between the actual output current and a preset current value; The voltage adjustment signal is sent to the boost unit so that the boost unit changes the buck-side voltage of the boost unit according to the voltage adjustment signal to obtain a new buck-side voltage of the boost unit, and the new buck-side voltage of the boost unit is sent to the charging pile, wherein the new buck-side voltage of the boost unit is used to instruct the charging pile to output a charging current after determining that the new buck-side voltage of the boost unit meets preset requirements.

8. The method according to claim 7, characterized in that The detecting the actual output current of the charging pile and generating a voltage adjustment signal according to a comparison result between the actual output current and a preset current value includes: Detecting the actual output current of the charging pile after a second preset time; If the actual output current of the charging pile is lower than the preset current value, a voltage reduction signal is generated; If the actual output current of the charging pile is greater than or equal to the preset current value, a voltage increase signal is generated.

9. The method according to claim 7, characterized in that: After sending the voltage adjustment signal to the boost unit, the method further includes: If the actual output current is less than the preset maximum allowable current value, a current output instruction for increasing the current is sent to the charging pile, so that the charging pile outputs the current according to the current output instruction for increasing the current; If the actual output current is greater than the preset maximum allowable current value, a current output instruction for reducing the current is sent to the charging pile, so that the charging pile outputs the current according to the current output instruction for reducing the current; If the actual output current is equal to the preset maximum allowable current value, no current output instruction is sent to the charging pile.

10. The method according to claim 9, characterized in that After sending a current output instruction for reducing the current to the charging pile, the method further includes: If the current value corresponding to the current output instruction for reducing the current is zero, charging is terminated.

11. A charging voltage control device, characterized in that: include: A value acquisition module, used to receive the maximum output voltage value of the charging pile sent by the battery management system, and obtain the battery pack voltage value, wherein the maximum output voltage value of the charging pile is sent to the battery management system by the charging gun when the charging pile detects that the charging gun is inserted; A value determination module, used to determine a target voltage value of a buck-side voltage of a boost unit according to a maximum output voltage value of the charging pile and a voltage value of the battery pack; A first input module, used for adjusting the voltage of the buck side of the boost unit to the target voltage value, and when the voltage of the buck side of the boost unit reaches the target voltage value, inputting the voltage of the buck side of the boost unit into the charging pile, so that the charging pile outputs a charging current after determining that the voltage of the buck side of the boost unit meets a preset requirement; The boost unit includes: a first switch, a second switch, a capacitor and a boost module, the first switch and the capacitor are connected in series and connected to the two ends of the step-down side of the boost module, the two ends of the high-voltage side of the boost module are respectively connected to the battery pack, the input end of the second switch is connected to one end of the capacitor, and the other end of the capacitor and the output end of the second switch are respectively connected to the charging pile; A first input module, specifically used to send a first control signal to the battery management system through the boost module, so that the battery management system controls the first switch to be closed; Using the battery pack voltage to charge the capacitor through the boost module, so that the voltage of the capacitor reaches the target voltage value; When the voltage on the buck side of the boost module reaches the target voltage value, a second control signal is sent to the battery management system through the boost module, so that the battery management system controls the second switch to close to input the voltage on the buck side of the boost module into the charging pile.

12. A charging voltage control device, characterized in that: include: A value receiving module, used for receiving a maximum output voltage value of the charging pile sent by the charging gun when the charging pile detects that a charging gun is inserted; A first sending module, used for sending the maximum output voltage value of the charging pile to the boost unit, so that the boost unit determines the target voltage value of the buck side voltage of the boost unit according to the maximum output voltage value of the charging pile and the acquired battery pack voltage value, adjusts the buck side voltage of the boost unit to the target voltage value, and sends the buck side voltage of the boost unit to the charging pile when the buck side voltage of the boost unit reaches the target voltage value, so that the charging pile outputs a charging current after determining that the buck side voltage of the boost unit meets the preset requirements; the boost unit comprises: a first switch, a second switch, a capacitor and a boost module, the first switch and the capacitor are connected in series and connected to the two ends of the buck side of the boost module, the two ends of the high voltage side of the boost module are respectively connected to the battery pack, the input end of the second switch is connected to one end of the capacitor, and the other end of the capacitor and the output end of the second switch are respectively connected to the charging pile; Accordingly, adjusting the voltage of the buck side of the boost unit to the target voltage value, and when the voltage of the buck side of the boost unit reaches the target voltage value, inputting the voltage of the buck side of the boost unit into the charging pile, comprises: Sending a first control signal to a battery management system through the boost module, so that the battery management system controls the first switch to be closed; Using the battery pack voltage to charge the capacitor through the boost module, so that the voltage of the capacitor reaches the target voltage value; When the voltage on the buck side of the boost module reaches the target voltage value, a second control signal is sent to the battery management system through the boost module, so that the battery management system controls the second switch to close to input the voltage on the buck side of the boost module into the charging pile.

13. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the charging voltage control method according to any one of claims 1 to 5.

14. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the charging voltage control method according to any one of claims 6 to 10.

15. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the charging voltage control method according to any one of claims 1 to 5.

16. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the charging voltage control method according to any one of claims 6 to 10.

17. A computer program product, characterized in that The invention comprises a computer program, which implements the charging voltage control method according to any one of claims 1 to 5 when executed by a processor.

18. A computer program product, characterized in that The invention comprises a computer program, which, when executed by a processor, implements the charging voltage control method according to any one of claims 6 to 10.

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