CN114583792A

CN114583792A - Charging voltage control method, charging voltage control apparatus, storage medium, and program product

Info

Publication number: CN114583792A
Application number: CN202210264845.6A
Authority: CN
Inventors: 阮鸥; 徐循进; 卢雄; 其他发明人请求不公开姓名
Original assignee: Zhejiang Geely Holding Group Co Ltd; Weirui Electric Automobile Technology Ningbo Co Ltd; Zeekr Automobile Ningbo Hangzhou Bay New Area Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Weirui Electric Automobile Technology Ningbo Co Ltd; Zeekr Automobile Ningbo Hangzhou Bay New Area Co Ltd
Priority date: 2022-03-17
Filing date: 2022-03-17
Publication date: 2022-06-03

Abstract

The application provides a charging voltage control method, a charging voltage control device, a charging voltage control apparatus, a storage medium and a program product. The method comprises the following steps: receiving a charging pile maximum output voltage value sent by a battery management system, and acquiring a battery pack voltage value, wherein the charging pile maximum output voltage value is sent to the battery management system by a charging gun when the charging gun is detected to be inserted by the charging pile; determining a target voltage value of the voltage reduction side of the voltage boosting unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack; and adjusting the voltage on the voltage reduction side of the voltage boosting unit to the target voltage value, and inputting the voltage on the voltage reduction side of the voltage boosting unit into the charging pile when the voltage on the voltage reduction side of the voltage boosting unit reaches the target voltage value, so that the charging pile outputs charging current after determining that the voltage on the voltage reduction side of the voltage boosting unit meets the preset requirement. The method increases the charging efficiency of the electric automobile.

Description

Charging voltage control method, charging voltage control apparatus, storage medium and program product

Technical Field

The present application relates to the field of electric vehicle technologies, and in particular, to a charging voltage control method, apparatus, device, storage medium, and program product.

Background

With the increasing awareness of the public on environmental protection, electric vehicles are gradually replacing the traditional fuel vehicles. Compared with the traditional fuel oil automobile, the electric automobile is lower in price, the expenditure generated in the using process is generally lower than that of the traditional automobile, and more intelligent services are generally provided.

At present, when an electric automobile is charged by using a charging pile, the electric automobile generally adopts a fixed voltage value to indicate the charging pile to output voltage, so that charging is realized.

However, the current electric vehicle cannot fully utilize the maximum output voltage of the charging pile during charging, and therefore has the problem of low efficiency.

Disclosure of Invention

The application provides a charging voltage control method, a charging voltage control device, equipment, a storage medium and a program product, which are used for solving the problem of low charging efficiency of an electric automobile.

In a first aspect, the present application provides a charging voltage control method, including:

receiving a charging pile maximum output voltage value sent by a battery management system, and acquiring a battery pack voltage value, wherein the charging pile maximum output voltage value is sent to the battery management system by a charging gun when the charging gun is detected to be inserted by the charging pile; determining a target voltage value of the voltage reduction side of the voltage boosting unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack; and adjusting the voltage on the voltage reduction side of the voltage boosting unit to a target voltage value, and inputting the voltage on the voltage reduction side of the voltage boosting unit into the charging pile when the voltage on the voltage reduction side of the voltage boosting unit reaches the target voltage value, so that the charging pile outputs charging current after the voltage on the voltage reduction side of the voltage boosting unit meets the preset requirement.

In one possible implementation manner, determining a target voltage value of the voltage on the voltage reduction side of the voltage boosting unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack includes: inquiring the value range of the voltage on the voltage reduction side of the voltage boosting unit corresponding to the voltage value of the battery pack according to preset bench calibration data, determining a first voltage value according to the difference value of the maximum output voltage value of the charging pile and a preset fluctuation voltage value, and determining a second voltage value according to the product of the voltage value of the battery pack and a preset coefficient; and determining the minimum one of the maximum value, the first voltage value and the second voltage value of the value range of the voltage on the voltage reduction side of the voltage boosting unit as the target voltage of the voltage on the voltage reduction side of the voltage boosting unit.

In one possible implementation, the boosting unit includes: the charging system comprises a first switch, a second switch, a capacitor and a boosting module, wherein the first switch and the capacitor are connected in series and are connected to two ends of a voltage reduction side of the boosting module; correspondingly, adjust the voltage of the step-down side of the voltage boost unit to target voltage value to when the voltage of the step-down side of the voltage boost unit reaches target voltage value, fill electric pile with the voltage input of the step-down side of the voltage boost unit, include: sending a first control signal to a battery management system through a boosting module so that the battery management system controls a first switch to be closed; the voltage of the battery pack is used for charging the capacitor through the voltage boosting module so as to enable the voltage of the capacitor to reach a target voltage value; when the voltage on the voltage reduction side of the voltage boosting module reaches the target voltage value, a second control signal is sent to the battery management system through the voltage boosting module, so that the battery management system controls the second switch to be closed to input the voltage on the voltage reduction side of the voltage boosting module into the charging pile.

In one possible implementation manner, after the capacitor is charged by the boost module using the battery pack voltage, the method further includes: detecting the voltage value of the capacitor after the first preset time to obtain the voltage of the capacitor; and 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 a screen of the charging pile or the vehicle for display.

In a possible implementation manner, after the voltage of the buck side of the voltage boost unit is input to the charging pile, the method further includes: receiving a voltage adjusting signal sent by a battery management system, wherein the voltage adjusting signal is generated by detecting the actual output current of a charging pile and according to the comparison result of the actual output current and the preset current value after the battery management system sends a current output instruction to the charging pile so that the charging pile outputs the current according to the preset current value; and when the voltage on the voltage reduction side of the voltage boosting unit reaches the new target voltage value, inputting the voltage on the voltage reduction side of the voltage boosting unit into the charging pile so that the charging pile outputs charging current after determining that the new target voltage value meets the preset requirement.

In one possible implementation manner, after the step-down side voltage of the step-up unit is sent to the charging pile, the method further includes: receiving over-voltage information sent by a battery management system, and reducing the voltage of the voltage reduction side of the voltage boosting unit according to the over-voltage information so as to enable the charging pile to output charging current after the voltage of the voltage reduction side of the voltage boosting unit meets the preset requirement, wherein the over-voltage information is sent to the battery management system by the charging pile.

In a second aspect, the present application provides a charging voltage control method, including:

receiving a maximum output voltage value of the charging pile, which is sent by the charging gun when the charging gun is inserted into the charging pile, through the charging gun;

the maximum output voltage value of the charging pile is sent to the voltage boosting unit, so that the voltage boosting unit determines a target voltage value of voltage on a voltage reduction side of the voltage boosting unit according to the maximum output voltage value of the charging pile and the acquired voltage value of the battery pack, the voltage on the voltage reduction side of the voltage boosting unit is adjusted to the target voltage value, and when the voltage on the voltage reduction side of the voltage boosting unit reaches the target voltage value, the voltage on the voltage reduction side of the voltage boosting unit is sent to the charging pile, so that the charging pile outputs charging current after the voltage on the voltage reduction side of the voltage boosting unit meets preset requirements.

In a possible implementation manner, after the sending the maximum output voltage value of the charging pile to the voltage boosting 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 adjusting signal according to the comparison result of the actual output current and the preset current value; and sending a voltage adjusting signal to the voltage boosting unit so that the voltage boosting unit changes the voltage at the voltage reduction side of the voltage boosting unit according to the voltage adjusting signal to obtain a new voltage at the voltage reduction side of the voltage boosting unit, and sending the new voltage at the voltage reduction side of the voltage boosting unit to the charging pile, wherein the new voltage at the voltage reduction side of the voltage boosting unit is used for indicating the charging pile to output charging current after the new voltage at the voltage reduction side of the voltage boosting unit meets the preset requirement.

In a possible implementation manner, detecting an 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, generating a voltage reduction signal; and if the actual output current of the charging pile is greater than or equal to the preset current value, generating a voltage increasing signal.

In one possible implementation manner, after sending the voltage adjustment signal to the voltage boosting unit, the method further includes: if the actual output current is smaller than the preset maximum allowable current value, sending a current output instruction for increasing the current 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 larger than the preset maximum allowable current value, sending a current output instruction for reducing the current to the charging pile so that the charging pile outputs the current according to the current output instruction for reducing the current; and if the actual output current is equal to the preset maximum allowable current value, not sending a current output instruction to the charging pile.

In a possible implementation manner, after sending the current output instruction for reducing the current to the charging pile, the method further includes: and if the current value corresponding to the current output command for reducing the current is zero, finishing the charging.

In a third aspect, the present application provides a charging voltage control apparatus, comprising:

the numerical value acquisition module is used for receiving the maximum output voltage value of the charging pile sent by the battery management system and acquiring the voltage value of the battery pack, wherein the maximum output voltage value of the charging pile is sent to the battery management system by the charging gun when the charging gun is detected to be inserted by the charging pile;

the numerical value determining module is used for determining a target voltage value of the voltage on the voltage reduction side of the voltage boosting unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack;

the first input module is used for adjusting the voltage of the voltage reduction side of the voltage boosting unit to a target voltage value, and inputting the voltage of the voltage reduction side of the voltage boosting unit into the charging pile when the voltage of the voltage reduction side of the voltage boosting unit reaches the target voltage value, so that the charging pile outputs charging current after the voltage of the voltage reduction side of the voltage boosting unit meets the preset requirement.

In a fourth aspect, the present application provides a charge voltage control device comprising:

the value receiving module is used for receiving the maximum output voltage value of the charging pile, which is sent by the charging gun when the charging gun is detected to be inserted, of the charging pile;

the first sending module is used for sending the maximum output voltage value of the charging pile to the voltage boosting unit, so that the voltage boosting unit can determine a target voltage value of voltage on the voltage reduction side of the voltage boosting unit according to the maximum output voltage value of the charging pile and the acquired voltage value of the battery pack, adjust the voltage on the voltage reduction side of the voltage boosting unit to the target voltage value, and send the voltage on the voltage reduction side of the voltage boosting unit to the charging pile when the voltage on the voltage reduction side of the voltage boosting unit reaches the target voltage value, so that the charging pile can output charging current after the voltage on the voltage reduction side of the voltage boosting unit meets the preset requirement.

In a fifth aspect, the present application provides an electronic device, comprising: a processor, and a memory communicatively coupled to the processor; the memory stores computer-executable instructions; the processor executes computer-executable instructions stored by the memory to implement the charge voltage control method as described above in the first aspect.

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

In a seventh aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and the computer-executable instructions are executed by a processor to implement the charging voltage control method of the first aspect.

In an eighth aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and the computer-executable instructions are executed by a processor to implement the charging voltage control method of the second aspect.

In a ninth aspect, the present application provides a computer program product comprising a computer program which, when executed by a processor, implements the charging voltage control method of the first aspect described above.

In a tenth aspect, the present application provides a computer program product comprising a computer program that, when executed by a processor, implements the charging voltage control method of the second aspect described above.

According to the charging voltage control method, the charging voltage control device, the charging voltage control equipment, the charging voltage storage medium and the program product, the voltage value with the maximum charging efficiency and required to be output by the charging pile is determined by obtaining the current battery pack voltage and the maximum output voltage of the charging pile, and the appropriate voltage value is sent to the charging pile, so that the charging pile outputs corresponding current, and the charging efficiency of the electric vehicle battery is improved.

Drawings

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 application.

Fig. 1 is a schematic view of an application scenario of a charging voltage control method according to an embodiment of the present application;

fig. 2 is a first schematic flowchart of a charging voltage control method according to an embodiment of the present disclosure;

fig. 3 is a second flowchart illustrating a charging voltage control method according to an embodiment of the present disclosure;

fig. 4 is an interaction flow diagram of a charging voltage control method according to an embodiment of the present disclosure;

fig. 5 is a first schematic diagram of a charging voltage control apparatus according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram of a charging voltage control apparatus according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

With the promotion of public environmental protection consciousness and multi-aspect capital support, new energy automobiles develop rapidly. Among new energy vehicles, electric vehicles are most rapidly developed, and gradually seize the market of conventional vehicles due to low price, low use cost, and additional various intelligent services.

At present, the power supply mode of an electric automobile is generally charging in a charging pile, when the electric automobile is connected with the charging pile through a charging gun, the electric automobile indicates that the charging pile outputs current in a preset voltage mode, so that charging is carried out, but the voltage is preset and fixed, so that the maximum output capacity of the charging pile cannot be completely utilized, and charging efficiency is low.

In order to solve the above problems, the present application provides the following technical ideas: through considering simultaneously filling electric pile maximum output voltage and battery current voltage value, make the voltage value of filling electric pile output within filling electric pile voltage output ability to be fit for current battery package voltage, thereby realize charging efficiency's improvement.

Fig. 1 is a schematic view of an application scenario of a charging voltage control method according to an embodiment of the present application. As in fig. 1, this scenario includes: the charging system comprises a boosting unit 101, a battery management system 102, a battery pack 103 and a charging pile 200.

In a specific implementation, the voltage boosting unit 101 may be composed of a first switch 1011, a second switch 1012, a capacitor 1013, and a voltage boosting module 1014, and the voltage boosting module may be composed of a voltage boosting circuit such as a boost (power boost) circuit or a voltage boosting circuit and a processor. The present application does not limit the specific specifications of the first switch 1011, the second switch 1012, and the capacitor 1013.

The BATTERY management system (BATTERY MANAGEMENT SYSTEM, BMS)102 may be composed of a plurality of sensors, a voltage acquisition circuit, a current acquisition circuit, a processor, a main control board and a communication module, and may be replaced by a BATTERY Energy Control Module (BECM).

The battery pack 103 may be a battery pack including any number of batteries, or may be a battery module.

The charging post 200 may be any charging post.

The voltage boosting unit 101 is configured to obtain a voltage value of the battery pack 104, determine a target voltage value of a voltage on a voltage-dropping side of the voltage boosting unit 101, adjust the voltage on the voltage-dropping side of the voltage boosting unit 101, and input the voltage on the voltage-dropping side into the charging pile.

And the battery management system 102 is configured to obtain the maximum output voltage value of the charging pile, and send the maximum output voltage value of the charging pile to the voltage boosting unit 101.

And the charging pile 200 is used for outputting corresponding current according to the voltage of the voltage reduction side.

It is to be understood that the illustrated structure of the embodiment of the present application does not constitute a specific limitation on the charging voltage control method. In other possible embodiments of the present application, the foregoing architecture may include more or less components than those shown in the drawings, or combine some components, or split some components, or arrange different components, which may be determined according to practical application scenarios, and is not limited herein. The components shown in fig. 1 may be implemented in hardware, software, or a combination of software and hardware.

The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 2 is a first flowchart illustrating a charging voltage control method according to an embodiment of the present disclosure. The execution subject of the embodiment of the present application may be the boosting unit 101 in fig. 1. As shown in fig. 2, the method includes:

s201: and receiving the maximum output voltage value of the charging pile sent by the battery management system, and acquiring the voltage value of the battery pack, wherein the maximum output voltage value of the charging pile is sent to the battery management system through the charging gun when the charging gun is detected to be inserted.

In this step, the received maximum output voltage value of the charging pile may be in any format that can be identified by the voltage boosting unit, for example, in a message format. The voltage value of the battery pack may be obtained by measurement, or may be a voltage value of the battery pack itself sent by the battery pack, which is not particularly limited in the present application.

S202: and determining a target voltage value of the voltage reduction side of the voltage boosting unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack.

In this step, the step-down side of the voltage boosting unit can be the side of the voltage boosting unit close to the charging pile, the target voltage value can be smaller than the maximum output voltage value of the charging pile, and can also be smaller than the voltage value of the battery pack, so that the charging of the battery pack with as high power as possible can be realized after the voltage boosting unit boosts the target voltage value.

For example, if the current maximum output voltage value of the charging post is 400V and the current voltage value of the battery pack is 450V, the target voltage value may be set to 390V or 400V.

S203: and adjusting the voltage on the voltage reduction side of the voltage boosting unit to a target voltage value, and inputting the voltage on the voltage reduction side of the voltage boosting unit into the charging pile when the voltage on the voltage reduction side of the voltage boosting unit reaches the target voltage value, so that the charging pile outputs charging current after the voltage on the voltage reduction side of the voltage boosting unit meets the preset requirement.

In one possible implementation, as shown in fig. 1, the boosting unit includes: first switch, second switch, electric capacity and the module that steps up, first switch and electric capacity series connection are connected in the both ends of the module step-down side that steps up, and the battery package is connected respectively at the high pressure side both ends of the module that steps up, and the input of second switch is connected with the one end of electric capacity, and the other end of electric capacity and the output of second switch insert respectively and fill electric pile.

Correspondingly, adjusting the voltage on the voltage-dropping side of the voltage-boosting unit to the target voltage value in step S203, and inputting the voltage on the voltage-dropping side of the voltage-boosting unit into the charging pile when the voltage on the voltage-dropping side of the voltage-boosting unit reaches the target voltage value specifically includes:

s2031: and sending a first control signal to the battery management system through the boosting module so that the battery management system controls the first switch to be closed.

In this step, the boost module sends a first control signal to the battery management system, where the first control signal may be sent to the battery management system in a message format, and the first control signal may be used to inform the battery management system that the first switch needs to be controlled to be closed.

S2032: and the voltage of the capacitor reaches a target voltage value by using the voltage of the battery pack to charge the capacitor through the boosting module.

In this step, the step-up module charges the capacitor using the voltage of the battery pack, which may be to conduct the capacitor and the battery pack to form a parallel connection relationship, and control the voltage so that the charged capacitor reaches a target voltage value.

S2033: when the voltage on the voltage reduction side of the voltage boosting module reaches the target voltage value, a second control signal is sent to the battery management system through the voltage boosting module, so that the battery management system controls the second switch to be closed to input the voltage on the voltage reduction side of the voltage boosting module into the charging pile.

In this step, the second control signal is similar to the first control signal in step S2031, and is not described herein again. The second switch closure makes electric capacity and fills electric pile parallelly connected to let the voltage input of the step-down side of the module that steps up fill electric pile.

According to the embodiment of the application, the current battery pack voltage and the maximum output voltage of the charging pile are obtained, the voltage value which needs to be output by the charging pile and is maximum in charging efficiency is determined, the appropriate voltage value is sent to the charging pile, the charging pile outputs corresponding current, and the charging efficiency of the electric automobile battery is improved.

In one possible implementation manner, after the step S203 of inputting the voltage of the buck side of the voltage boosting unit into the charging pile, the method further includes: and receiving the voltage failure information sent by the charging pile, and finishing charging.

The voltage failure information may be sent by the charging pile after the charging pile determines that the voltage on the voltage reduction side of the voltage boosting unit cannot serve as the output voltage of the charging pile.

In a possible implementation manner, in step S202, determining a target voltage value of the voltage on the voltage-dropping side of the voltage-boosting unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack, specifically includes:

s2021: and inquiring the value range of the voltage on the voltage reduction side of the voltage boosting unit corresponding to the voltage value of the battery pack according to preset bench calibration data, determining a first voltage value according to the difference value of the maximum output voltage value of the charging pile and a preset fluctuation voltage value, and determining a second voltage value according to the product of the voltage value of the battery pack and a preset coefficient.

In this step, the preset calibration data of the rack includes a corresponding relationship between the battery pack voltage and a suitable range of the charging voltage. The preset fluctuation voltage value may be empirical data obtained through experimental measurement, or may be data set by a user of the electric vehicle, which is not specifically limited in the present application. The difference value between the maximum output voltage value of the charging pile and the preset fluctuation voltage value is a numerical value obtained by subtracting the preset fluctuation voltage value from the maximum output voltage value of the charging pile, and the first voltage value is smaller than or equal to the difference value.

The preset coefficient may be obtained by the following formula:

K＜(1-(T1+T2+T3)*F)

the voltage boosting unit comprises a voltage boosting module, a T2, a T3 and a F, wherein K is a preset coefficient, T1 is the dead time of the voltage boosting module in the voltage boosting unit, T2 is the opening time of the voltage boosting module in the voltage boosting unit, T3 is the minimum conducting time of the voltage boosting module in the voltage boosting unit, and F is the switching frequency.

The second voltage value is a value smaller than the product of the voltage value of the battery pack and the preset coefficient, and the value of the second voltage value can be the maximum value as far as possible.

Specifically, for example, if the maximum output voltage value of the charging pile is 500V and the fluctuation voltage value is 25V, the first voltage value is less than or equal to 475V according to the preset calibration data of the platform. If the above-mentioned T1 is 3. mu.s, T2 is 1. mu.s, T3 is 2. mu.s and F is 1/100. mu.s, the above-mentioned coefficient K is less than 94%.

S2022: and determining the minimum one of the maximum value, the first voltage value and the second voltage value of the value range of the voltage on the voltage reduction side of the voltage boosting unit as the target voltage of the voltage on the voltage reduction side of the voltage boosting unit.

Specifically, for example, if the voltage on the voltage-decreasing side of the voltage-increasing 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 may be determined to be 230V, 229V, or 229.5V. If the voltage on the voltage-dropping side of the voltage-boosting unit has a value ranging 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 may be determined to be 400V. If the voltage on the buck side of the boost unit has a value in a range of 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 may be determined to be 300V, 299V, or 299.5V.

As can be seen from the above description of the embodiments, the maximum target voltage value meeting the requirements of the voltage-reducing side of the voltage-boosting unit can be selected by comparing the value range of the voltage, the first voltage value and the second voltage value.

In a possible implementation manner, the step S202 may further be: and determining a candidate voltage selection range according to the first voltage value and the second voltage value, searching in preset rack calibration data to obtain a voltage value with the highest charging efficiency in the candidate voltage selection range, and determining the voltage value with the highest charging efficiency in the candidate voltage selection range as a target voltage value of the voltage on the voltage reduction side of the voltage boosting unit.

Determining the candidate voltage selection range according to the first voltage value and the second voltage value may include: and taking the smaller one 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.

In one possible implementation manner, after the step S2032 is performed to charge the capacitor with the voltage of the battery pack through the voltage boosting module, the method further includes:

S204A: and detecting the voltage value of the capacitor after the first preset time to obtain the voltage of the capacitor.

Specifically, the first preset time may be set according to an empirical value, for example, 200ms, 250ms, or 300 ms.

S205A: and 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 a screen of the charging pile or the vehicle for display.

In this step, the fault information may be in a message format or in other formats, as long as the screen of the charging pile or the vehicle can be displayed. The content of the failure information may be "charging failure" or "charging preparation failure", and the like, and the present application is not particularly limited thereto.

As can be seen from the description of the above embodiments, in the embodiments of the present application, the user may be prompted that a fault occurs in the charging process by sending the fault information after the charging fails.

In a possible time manner, the voltage of the capacitor is obtained in the step S204A, and it is confirmed that the voltage of the capacitor does not reach the target voltage value, the capacitor can be recharged, and the steps S204A and S205A are performed again.

In a possible implementation manner, after the step S203 inputs the voltage on the voltage reduction side of the voltage boosting unit into the charging pile, the method further includes:

S204B: and receiving a voltage adjusting signal sent by the battery management system, wherein the voltage adjusting signal is generated by detecting the actual output current of the charging pile and according to a comparison result of the actual output current and the preset current value after the battery management system sends a current output instruction to the charging pile so that the charging pile outputs the current according to the preset current value.

In this step, the voltage adjustment signal includes a decrease voltage signal or an increase voltage signal.

S205B: and when the voltage on the voltage reduction side of the voltage boosting unit reaches the new target voltage value, inputting the voltage on the voltage reduction side of the voltage boosting unit into the charging pile so that the charging pile outputs charging current after determining that the new target voltage value meets the preset requirement.

In this step, the target voltage value is decreased if the voltage adjustment signal is a decrease voltage signal, and the target voltage value is increased if the voltage adjustment signal is an increase voltage signal. The process of inputting the voltage of the voltage reduction side of the voltage boosting unit into the charging pile is the same as that in step S203, and is not described herein again.

Specifically, the target voltage value may be decreased or decreased according to a preset value or a preset ratio. The preset value and the preset proportion can be set in advance, and the application is not limited.

For example, when the current target voltage value is 400V, the target voltage value is lowered by 10V to 390V or lowered by 5% to 380V when the voltage adjustment signal is a reduced voltage signal. When the current target voltage value is 400V, the target voltage value is increased by 10V to 410V or increased by 5% to 420V when the voltage adjustment signal is the increase voltage signal.

It can be known from the description of the above embodiment that, in the embodiment of the present application, by receiving the voltage adjustment signal, the target voltage value can be adjusted, and the adjustment of the voltage on the voltage reduction side of the voltage boost unit is further implemented, so that the accurate control of the voltage is implemented, and the charging efficiency is favorably improved.

In a possible implementation manner, after the step S203 sends the voltage on the buck side of the voltage boosting unit to the charging pile, the method further includes:

S204C: receiving over-voltage information sent by a battery management system, and reducing the voltage of the voltage reduction side of the voltage boosting unit according to the over-voltage information so as to enable the charging pile to output charging current after the voltage of the voltage reduction side of the voltage boosting unit meets the preset requirement, wherein the over-voltage information is sent to the battery management system by the charging pile.

In this step, after the voltage boost unit receives the voltage over-high information, the voltage on the buck side of the voltage boost unit may be reduced according to a preset value or a preset ratio, and the reduction method is similar to the above step S205B, and is not described herein again.

As can be seen from the description of the above embodiments, the embodiments of the present application can achieve the effect of reducing the voltage and increasing the current when the current is insufficient due to an excessively high voltage, and improve the charging efficiency by adjusting the voltage to control the current value.

In a possible implementation manner, after the step S205B changes the target voltage value according to the voltage adjustment signal to obtain a new target voltage value, the method further includes:

S206B: the charging method comprises the steps of receiving a charging ending instruction sent by a battery management system to enable a first switch and a second switch to be disconnected, wherein the charging ending instruction is that the battery management system sends a current output instruction to a charging pile to enable the charging pile to output current according to a preset current value, detecting actual output current of the charging pile, generating a voltage adjusting signal according to a comparison result of the actual output current and the preset current value, sending a new current output instruction to the charging pile according to the actual output current of the charging pile and a preset maximum allowable current value, and outputting when the current value corresponding to the new current output instruction is zero.

Fig. 3 is a second flowchart illustrating a charging voltage control method according to an embodiment of the present disclosure. The execution subject of the embodiment of the present application may be the battery management system 102 in fig. 1. As shown in fig. 3, the method includes:

s301: and receiving the maximum output voltage value of the charging pile sent by the charging gun when the charging gun is detected to be inserted.

In this step, the maximum output voltage value of the charging pile may be in a message format, which may represent an upper limit of the voltage output of the charging pile.

S302: the maximum output voltage value of the charging pile is sent to the voltage boosting unit, so that the voltage boosting unit determines a target voltage value of voltage on a voltage reduction side of the voltage boosting unit according to the maximum output voltage value of the charging pile and the acquired voltage value of the battery pack, the voltage on the voltage reduction side of the voltage boosting unit is adjusted to the target voltage value, and when the voltage on the voltage reduction side of the voltage boosting unit reaches the target voltage value, the voltage on the voltage reduction side of the voltage boosting unit is sent to the charging pile, so that the charging pile outputs charging current after the voltage on the voltage reduction side of the voltage boosting unit meets preset requirements.

In this step, the maximum output voltage value of the charging pile is sent to the voltage boosting unit, which may also be sent in a message format.

According to the embodiment of the application, the maximum output voltage value sent by the charging pile is received, the maximum output voltage value of the charging pile is sent to the boosting unit, the purpose that the boosting unit determines the target voltage value of the voltage reduction side voltage of the appropriate boosting unit according to the maximum output voltage of the charging pile and the battery voltage can be achieved, and the problem of low efficiency caused by the fact that the charging pile outputs the fixed voltage value is solved.

In a possible implementation manner, after the step S302 sends the maximum output voltage value of the charging pile to the voltage boosting unit, the method further includes:

s303: and sending a current output instruction to the charging pile so that the charging pile outputs current according to a preset current value.

In this step, the current output command may include a preset current value and a command to output a current at the preset current value.

Specifically, the preset current value may be 16A, 32A, 65A, or the like, and the present application does not specifically limit this value, and an empirical value may be used.

S304: and detecting the actual output current of the charging pile, and generating a voltage adjusting signal according to the comparison result of the actual output current and the preset current value.

In a possible implementation manner, the step specifically includes:

s3041: and detecting the actual output current of the charging pile after a second preset time.

In this step, the second preset time may be 200ms, 250ms, 300ms, or the like, which is not particularly limited in this application.

S3042: and if the actual output current of the charging pile is lower than the preset current value, generating a voltage reduction signal.

In this step, the step-down voltage signal may be a signal for instructing the voltage boosting unit to lower the voltage on the step-down side of the voltage boosting unit, wherein the step-down voltage on the step-down side of the voltage boosting unit may be a voltage that is lowered by a preset voltage value or a preset ratio.

S3043: and if the actual output current of the charging pile is greater than or equal to the preset current value, generating a voltage increasing signal.

In this step, the step-up voltage signal may be a signal for instructing the voltage boosting unit to increase the voltage on the voltage-reducing side of the voltage boosting unit, wherein the step-up voltage on the voltage-reducing side of the voltage boosting unit may be increased according to a preset voltage value or a preset ratio.

In this step, the generated voltage adjustment signal may be a voltage adjustment signal that decreases the voltage if the actual output current is lower than the preset current value, and may be a voltage adjustment signal that increases the voltage if the actual output current is equal to or higher than the preset current value.

S305: and sending a voltage adjusting signal to the voltage boosting unit so that the voltage boosting unit changes the voltage at the voltage reduction side of the voltage boosting unit according to the voltage adjusting signal to obtain a new voltage at the voltage reduction side of the voltage boosting unit, and sending the new voltage at the voltage reduction side of the voltage boosting unit to the charging pile, wherein the new voltage at the voltage reduction side of the voltage boosting unit is used for indicating the charging pile to output charging current after the new voltage at the voltage reduction side of the voltage boosting unit meets the preset requirement.

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

According to the embodiment, the current output condition of the charging pile is detected, the voltage value output by the charging pile is dynamically adjusted, and the maximum value of the voltage value output by the charging pile can be reached under the condition that the current is ensured. The calibration of the maximum output voltage of the charging pile is avoided from being inaccurate, and the situation that the maximum output voltage of the charging pile cannot be completely utilized is caused. Meanwhile, the situation that the relation between the current of the charging pile and the preset current value is judged by mistake when the output current is not adjusted in time in the charging pile can be avoided by detecting the actual output current of the charging pile after the second preset time.

In a possible implementation manner, after sending the voltage adjustment signal to the voltage boosting unit, the step S305 further includes:

S306A: and if the actual output current is smaller than the preset maximum allowable current value, sending a current output instruction for increasing the current to the charging pile so that the charging pile outputs the current according to the current output instruction for increasing the current.

In this step, the preset maximum allowable current may be the minimum one of the maximum output current that can be reached by the charging pile, the maximum withstand current of the boosting unit, and the maximum withstand current of the battery pack, the maximum withstand current of the battery pack may be obtained by a predetermined measurement, different maximum withstand currents exist for different battery pack voltages, and a current corresponding to the maximum withstand current of the battery pack before boosting may also be determined by a conversion relationship between the current after boosting and the current before boosting, where the conversion relationship may be obtained by a predetermined measurement. The current output instruction for increasing the current may include a current value larger than the actual output current, may also include a current value larger than a preset value of the actual output current, and may also include an increase of the output current.

S306B: and if the actual output current is larger than the preset maximum allowable current value, sending a current output instruction for reducing the current to the charging pile so that the charging pile outputs the current according to the current output instruction for reducing the current.

In this step, the current output command for reducing the current may include a current value smaller than the actual output current, a current value smaller than a preset value of the actual output current, and a reduction amount of the output current.

S306C: and if the actual output current is equal to the preset maximum allowable current value, not sending a current output instruction to the charging pile.

In this step, the current output command is not sent to the charging pile, indicating that the actual output current value is maintained.

As can be seen from the description of the above embodiments, in the embodiments of the present application, by comparing the actual output current with the preset maximum allowable current value, it can be determined whether the current value needs to be increased or decreased, and if the current value can be increased, the charging efficiency can be further increased.

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

s307: and if the current value corresponding to the new current output command is zero, ending the charging.

In this step, the preset maximum allowable current is gradually decreased due to the gradual increase of the battery voltage, and the maximum allowable current value is decreased to zero when the battery is fully charged. The ending of the charging may be controlling the first switch and the second switch in the boosting unit to be turned off.

Fig. 4 is an interaction flow diagram of a charging voltage control method according to an embodiment of the present disclosure. In this embodiment, the overall charging process is described, and as shown in fig. 4, the interaction flow of the charging voltage control method includes the following steps:

s401: the battery management system acquires a maximum voltage value of the charging pile and a voltage value of the battery pack and sends the maximum voltage value and the voltage of the battery pack to the voltage boosting unit. This step corresponds to step S201 described above.

S402: and the voltage boosting unit determines a target voltage value of the voltage on the voltage reduction side of the voltage boosting unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack.

This step corresponds to step S202 described above.

S403: and a boosting module in the boosting unit sends a first control signal to the battery management system so that the battery management system controls the first switch to be closed, and the capacitor is charged by using the voltage of the battery pack so that the voltage of the capacitor reaches a target voltage value.

This step corresponds to step S2031 and step S2032.

S404: the voltage boosting unit detects the voltage value of the capacitor to obtain the voltage of the capacitor.

S405: the boosting unit determines whether the voltage of the capacitor reaches the target voltage value, and if not, proceeds to step S406, and if so, proceeds to step S407.

S406: and sending fault information to the battery management system so that the battery management system sends the fault information to a screen of the charging pile or the vehicle for display.

This step corresponds to step S205A described above.

S407: the voltage boosting unit sends a second control signal to the battery management system, so that the battery management system controls the second switch to be closed to input the voltage on the voltage reduction side of the voltage boosting module into the charging pile.

This step corresponds to step S2033. Step S408 is performed after step S407.

S408: and the charging pile judges whether the voltage meets the requirement, if not, the step S409 is carried out, then the step S407 is carried out, and if so, the step S410 is carried out.

S409: the charging pile sends over-voltage information to the battery management system, and the battery management system sends the over-voltage information to the voltage boosting unit, so that the voltage boosting unit reduces the voltage of the voltage reduction side.

Steps S408 and S409 correspond to step S204C described above.

S410: and 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.

This step corresponds to step S303, and step S411 is executed after the charging pile outputs the current according to the preset current value in step S410.

S411: the battery management system judges whether the actual output current reaches a preset current value. If the preset current value is reached, step S412 is executed, and if the preset current value is not reached, step S413 is executed.

S412: the battery management system generates an increased voltage signal.

S413: the battery management system generates a reduced voltage signal.

Steps S411, S412, and S413 correspond to step S305. Step S414 is performed after step S413.

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 performed, and if the output current is less than the maximum allowable current value, step S416 is performed.

S415: and the battery management system sends a current output instruction for reducing current to the charging pile.

After step S415, step S417 is executed.

S416: and the battery management system sends a current output instruction for increasing the current to the charging pile.

The above steps S414, S415, S416 correspond to the above steps S306A, S306B.

S417: the battery management system determines whether a current value corresponding to the current output command to reduce the current is zero. If the value is zero, step S418 is executed, and if the value is not zero, step S414 is executed again.

S418: and finishing charging.

Steps S417 and S418 correspond to step S307 described above.

Fig. 5 is a first schematic diagram of a charging voltage control apparatus according to an embodiment of the present disclosure. As shown in fig. 5, the charge voltage control device 500 includes: a value obtaining module 501, a value determining module 502 and a first input module 503.

The value acquisition module 501 is configured to receive a maximum output voltage value of the charging pile sent by the battery management system, and acquire a voltage value of a battery pack, where the maximum output voltage value of the charging pile is sent to the battery management system by a charging gun when the charging gun is detected to be inserted by the charging pile;

a value determining module 502, configured to determine a target voltage value of the voltage on the voltage reduction side of the voltage boosting unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack;

the first input module 503 is configured to adjust the voltage on the voltage-dropping side of the voltage-boosting unit to a target voltage value, and input the voltage on the voltage-dropping side of the voltage-boosting unit into the charging pile when the voltage on the voltage-dropping side of the voltage-boosting unit reaches the target voltage value, so that the charging pile outputs the charging current after determining that the voltage on the voltage-dropping side of the voltage-boosting unit meets the preset requirement.

In a possible implementation manner, the value determining module 502 is specifically configured to query, at preset rack calibration data, a value range of a voltage on a voltage reduction side of a voltage boosting unit corresponding to a voltage value of a battery pack, determine a first voltage value according to a difference between a maximum output voltage value of a charging pile and a preset fluctuation voltage value, and determine a second voltage value according to a product of the voltage value of the battery pack and a preset coefficient. And determining the minimum one of the maximum value, the first voltage value and the second voltage value of the value range of the voltage on the voltage reduction side of the voltage boosting unit as the target voltage of the voltage on the voltage reduction side of the voltage boosting unit.

In one possible implementation, the boosting unit includes: first switch, second switch, electric capacity and the module that steps up, first switch and electric capacity series connection are connected in the both ends of the module step-down side that steps up, and the battery package is connected respectively at the high pressure side both ends of the module that steps up, and the input of second switch is connected with the one end of electric capacity, and the other end of electric capacity and the output of second switch insert respectively and fill electric pile. The voltage input module 503 is specifically configured to send a first control signal to the battery management system through the voltage boost module, so that the battery management system controls the first switch to be closed. And the voltage of the capacitor reaches a target voltage value by using the voltage of the battery pack to charge the capacitor through the boosting module. When the voltage on the voltage reduction side of the voltage boosting module reaches the target voltage value, a second control signal is sent to the battery management system through the voltage boosting module, so that the battery management system controls the second switch to be closed to input the voltage on the voltage reduction side of the voltage boosting module into the charging pile.

With continued reference to fig. 5. In one possible implementation manner, the charging voltage control apparatus 500 further includes: a voltage obtaining module 504 and a second sending module 505.

The voltage obtaining module 504 is configured to detect a voltage value of the capacitor after a first preset time to obtain a voltage of the capacitor.

And a second sending module 505, configured 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 a screen of the charging pile or the vehicle for display.

With continued reference to fig. 5. In a possible implementation manner, the charging voltage control apparatus 500 further includes: a third sending module 506 and a second input module 507.

A third sending module 506, configured to receive a voltage adjustment signal sent by the battery management system, where the voltage adjustment signal is generated according to a comparison result between the actual output current and the preset current value by detecting an actual output current of the charging pile after the battery management system sends a current output instruction to the charging pile so that the charging pile outputs the current according to the preset current value.

And a second input module 507, configured to adjust the target voltage value according to the voltage adjustment signal to obtain a new target voltage value, adjust the voltage on the voltage reduction side of the voltage boost unit to the new target voltage value, and input the voltage on the voltage reduction side of the voltage boost unit into the charging pile when the voltage on the voltage reduction side of the voltage boost unit reaches the new target voltage value, so that the charging pile outputs a charging current after determining that the new target voltage value meets the preset requirement.

With continued reference to fig. 5. In one possible implementation manner, the charging voltage control apparatus 500 further includes: a voltage reduction module 508.

And the voltage reduction module 508 is configured to receive the information of the voltage excess sent by the battery management system, and reduce the voltage on the voltage reduction side of the voltage boost unit according to the information of the voltage excess, so that the charging pile outputs a charging current after determining that the voltage on the voltage reduction side of the voltage boost unit meets a preset requirement, where the information of the voltage excess is sent to the battery management system by the charging pile.

The apparatus provided in this embodiment may be used to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.

Fig. 6 is a schematic diagram of a charging voltage control apparatus according to an embodiment of the present application. As shown in fig. 6, charge voltage control apparatus 600 includes: a value receiving module 601 and a first sending module 602.

The value receiving module 601 is configured to receive a maximum output voltage value of the charging pile sent by the charging gun when the charging gun is detected to be inserted into the charging pile.

The first sending module 602 is configured to send the maximum output voltage value of the charging pile to the voltage boosting unit, so that the voltage boosting unit determines a target voltage value of a voltage on a voltage reduction side of the voltage boosting unit according to the maximum output voltage value of the charging pile and the acquired voltage value of the battery pack, adjust the voltage on the voltage reduction side of the voltage boosting unit to the target voltage value, and send the voltage on the voltage reduction side of the voltage boosting unit to the charging pile when the voltage on the voltage reduction side of the voltage boosting unit reaches the target voltage value, so that the charging pile outputs a charging current after determining that the voltage on the voltage reduction side of the voltage boosting unit meets a preset requirement.

With continued reference to fig. 6. In one possible implementation manner, the charging voltage control apparatus 600 further includes: a fourth sending module 603, a first generating module 604 and a fifth sending module 605.

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

The first generating module 604 is configured to detect an actual output current of the charging pile, and generate a voltage adjusting signal according to a comparison result between the actual output current and a preset current value.

A fifth sending module 605, configured to send a voltage adjustment signal to the voltage boosting unit, so that the voltage boosting unit changes the voltage at the voltage reduction side of the voltage boosting unit according to the voltage adjustment signal, to obtain a new voltage at the voltage reduction side of the voltage boosting unit, and sends the new voltage at the voltage reduction side of the voltage boosting unit to the charging pile, where the new voltage at the voltage reduction side of the voltage boosting unit is used to instruct the charging pile to output a charging current after determining that the new voltage at the voltage reduction side of the voltage boosting unit meets the preset requirement.

With continued reference to fig. 6. In one possible implementation manner, the charging voltage control apparatus 600 further includes: a current detection module 606, a second generation module 607, and a third generation module 608.

And the current detection module 606 is used for detecting the actual output current of the charging pile after a second preset time.

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

A third generating module 608, configured to generate a voltage-increasing signal if the actual output current of the charging pile is greater than or equal to the preset current value.

Continuing with reference to fig. 6. In one possible implementation manner, the charging voltage control apparatus 600 further includes: instruction issue module 609.

The instruction sending module 609 is configured to send a current output instruction for increasing the current to the charging pile if the actual output current is smaller than a preset maximum allowable current value, so that the charging pile outputs the current according to the current output instruction for increasing the current; if the actual output current is larger than the preset maximum allowable current value, sending a current output instruction for reducing the current to the charging pile so that the charging pile outputs the current according to the current output instruction for reducing the current; and if the actual output current is equal to the preset maximum allowable current value, not sending a current output instruction to the charging pile.

With continued reference to fig. 6. In a possible implementation manner, the charging voltage control apparatus 600 further includes: the charging module 610 is ended.

The charging ending module 610 is configured to end charging if a current value corresponding to the current output instruction for reducing the current is zero.

Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application. For example, referring to fig. 7, the electronic device 700 may comprise a processor 701 and a memory 702 communicatively coupled to the processor 701.

The memory 702 stores computer-executable instructions.

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

Alternatively, the memory 702 may be separate or integrated with the processor 701. When the memory 702 is a separate device from the processor 701, the electronic device may further include: a bus for connecting the memory 702 and the processor 701.

The present application further provides a computer-readable storage medium, where a computer execution instruction is stored in the computer-readable storage medium, and when a processor executes the computer execution instruction, the technical solution of the charging voltage control method in any of the above embodiments is implemented, and the implementation principle and the beneficial effects of the method are similar to those of the charging voltage control method, which can be referred to as the implementation principle and the beneficial effects of the charging voltage control method, and are not described herein again.

The present application further provides a computer program product, including a computer program, where when the computer program is executed by a processor, the technical solution of the charging voltage control method in any of the above embodiments is implemented, and the implementation principle and the beneficial effects of the computer program are similar to those of the charging voltage control method, and reference may be made to the implementation principle and the beneficial effects of the charging voltage control method, which are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.

Modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to implement the solution of the present embodiment.

In addition, functional modules in the embodiments of the present application may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one unit. The unit formed by the modules can be realized in a hardware form, and can also be realized in a form of hardware and a software functional unit.

The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor to execute some steps of the methods according to the embodiments of the present application.

It should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.

The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc.

The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (Extended Industry Standard Architecture) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.

The storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, 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 or optical disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the storage medium may reside as discrete components in an electronic device or host device.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements 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 application is limited only by the appended claims.

Claims

1. A charging voltage control method is applied to a boosting unit and comprises the following steps:

receiving a charging pile maximum output voltage value sent by a battery management system, and acquiring a battery pack voltage value, wherein the charging pile maximum output voltage value is sent to the battery management system by a charging gun when the charging gun is detected to be inserted by the charging pile;

determining a target voltage value of the voltage reduction side of the voltage boosting unit according to the maximum output voltage value of the charging pile and the voltage value of the battery pack;

and adjusting the voltage on the voltage reduction side of the voltage boosting unit to the target voltage value, and inputting the voltage on the voltage reduction side of the voltage boosting unit into the charging pile when the voltage on the voltage reduction side of the voltage boosting unit reaches the target voltage value, so that the charging pile outputs charging current after determining that the voltage on the voltage reduction side of the voltage boosting unit meets the preset requirement.

2. The method of claim 1, wherein determining the target voltage value of the voltage on the buck side of the boost unit according to the maximum output voltage value of the charging post and the voltage value of the battery pack comprises:

inquiring the value range of the voltage on the voltage reduction side of the voltage boosting unit corresponding to the voltage value of the battery pack according to preset rack calibration data, determining a first voltage value according to the difference value of the maximum output voltage value of the charging pile and a preset fluctuation voltage value, and determining a second voltage value according to the product of the voltage value of the battery pack and a preset coefficient;

and determining the minimum one of the maximum value of the value range of the voltage on the voltage reduction side of the voltage boosting unit, the first voltage value and the second voltage value as the target voltage of the voltage on the voltage reduction side of the voltage boosting unit.

3. The method of claim 1, wherein the booster unit comprises: the charging pile comprises a first switch, a second switch, a capacitor and a boosting module, wherein the first switch and the capacitor are connected in series and are connected to two ends of a voltage reduction side of the boosting module, two ends of a high-voltage side of the boosting module are respectively connected with a battery pack, an input end of the second switch is connected with one end of the capacitor, and the other end of the capacitor and an output end of the second switch are respectively connected to the charging pile;

accordingly, adjusting the voltage on the buck side of the boost unit to the target voltage value, and inputting the voltage on the buck side of the boost unit to the charging pile when the voltage on the buck side of the boost unit reaches the target voltage value, includes:

sending a first control signal to the battery management system through the boosting module so that the battery management system controls the first switch to be closed;

charging, by the boost module, the capacitor with a battery pack voltage to cause the voltage of the capacitor to reach the target voltage value;

when the voltage on the voltage reduction side of the voltage boosting module reaches the target voltage value, a second control signal is sent to the battery management system through the voltage boosting module, so that the battery management system controls the second switch to be closed, and the voltage on the voltage reduction side of the voltage boosting module is input into the charging pile.

4. The method of claim 3, further comprising, after charging the capacitor with the battery pack voltage by the boost module:

detecting the voltage value of the capacitor after a first preset time to obtain the voltage of the capacitor;

and 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 a screen of a charging pile or a vehicle for display.

5. The method according to any one of claims 1 to 4, wherein after the step-down side voltage of the step-up unit is input to the charging pile, the method further comprises:

receiving a voltage adjusting signal sent by the battery management system, wherein the voltage adjusting signal is generated by detecting the actual output current of the charging pile and according to a comparison result of the actual output current and a preset current value after the battery management system sends a current output instruction to the charging pile so that the charging pile outputs the current according to the preset current value;

and adjusting the target voltage value according to the voltage adjusting signal to obtain a new target voltage value, adjusting the voltage on the voltage reduction side of the voltage boosting unit to the new target voltage value, and inputting the voltage on the voltage reduction side of the voltage boosting unit into the charging pile when the voltage on the voltage reduction side of the voltage boosting unit reaches the new target voltage value, so that the charging pile outputs a charging current after determining that the new target voltage value meets a preset requirement.

6. The method of any one of claims 1 to 4, further comprising, after the sending the buck-side voltage of the boost unit to the charging post:

receiving the over-voltage information sent by the battery management system, and reducing the voltage on the voltage reduction side of the voltage boosting unit according to the over-voltage information so as to enable the charging pile to output charging current after determining that the voltage on the voltage reduction side of the voltage boosting unit meets the preset requirement, wherein the over-voltage information is sent to the battery management system by the charging pile.

7. A charging voltage control method is applied to a battery management system and comprises the following steps:

receiving a maximum output voltage value of the charging pile, which is sent by a charging gun when the charging gun is inserted into the charging pile, through the charging gun;

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

8. The method of claim 7, further comprising, after sending the charging post maximum output voltage value to a voltage boost unit:

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 adjusting signal according to the comparison result of the actual output current and a preset current value;

and sending the voltage adjusting signal to the voltage boosting unit so that the voltage boosting unit changes the voltage at the voltage reduction side of the voltage boosting unit according to the voltage adjusting signal to obtain a new voltage at the voltage reduction side of the voltage boosting unit, and sending the new voltage at the voltage reduction side of the voltage boosting unit to the charging pile, wherein the new voltage at the voltage reduction side of the voltage boosting unit is used for indicating the charging pile to output charging current after the new voltage at the voltage reduction side of the voltage boosting unit meets the preset requirement.

9. The method of claim 8, wherein the detecting an actual output current of the charging post and generating a voltage adjustment signal according to a comparison result between the actual output current and a preset current value comprises:

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;

and if the actual output current of the charging pile is greater than or equal to the preset current value, generating a voltage increasing signal.

10. The method of claim 8, further comprising, after sending the voltage adjustment signal to the boost unit:

if the actual output current is smaller than a preset maximum allowable current value, sending a current output instruction for increasing the current 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 larger than a preset maximum allowable current value, sending a current output instruction for reducing the current to the charging pile so that the charging pile outputs the current according to the current output instruction for reducing the current;

and if the actual output current is equal to a preset maximum allowable current value, not sending a current output instruction to the charging pile.

11. The method of claim 10, further comprising, after said sending a reduced current output command to said charging post:

and if the current value corresponding to the current output instruction for reducing the current is zero, finishing charging.

12. A charging voltage control apparatus, characterized by comprising:

the device comprises a numerical value acquisition module, a battery management system and a charging gun detection module, wherein the numerical value acquisition module is used for receiving a charging pile maximum output voltage value sent by the battery management system and acquiring a battery pack voltage value, and the charging pile maximum output voltage value is sent to the battery management system by the charging gun when the charging gun is detected to be inserted by the charging pile;

the first input module is used for adjusting the voltage on the voltage reduction side of the voltage boosting unit to the target voltage value, and inputting the voltage on the voltage reduction side of the voltage boosting unit into the charging pile when the voltage on the voltage reduction side of the voltage boosting unit reaches the target voltage value, so that the charging pile outputs charging current after determining that the voltage on the voltage reduction side of the voltage boosting unit meets preset requirements.

13. A charging voltage control apparatus, comprising:

the charging pile comprises a charging pile, a first sending module and a second sending module, wherein the charging pile is used for charging the battery pack, the first sending module is used for sending the maximum output voltage value of the charging pile to a voltage boosting unit so that the voltage boosting unit can determine the target voltage value of the voltage boosting side of the voltage boosting unit according to the maximum output voltage value of the charging pile and the acquired voltage value of the battery pack, the voltage boosting side of the voltage boosting unit is adjusted to the target voltage value, and when the voltage boosting side of the voltage boosting unit reaches the target voltage value, the voltage boosting side of the voltage boosting unit is sent to the charging pile so that the charging pile outputs charging current after the voltage boosting side of the voltage boosting unit meets preset requirements.

14. An electronic device, comprising: a processor, and a memory communicatively coupled to the processor;

the memory stores computer-executable instructions;

the processor executes computer-executable instructions stored by the memory to implement the charge voltage control method of any one of claims 1 to 7.

15. An electronic device, comprising: a processor, and a memory communicatively coupled to the processor;

the memory stores computer-executable instructions;

the processor executes computer-executable instructions stored by the memory to implement the charge voltage control method of any one of claims 8 to 11.

16. A computer-readable storage medium having computer-executable instructions stored therein, which when executed by a processor, are configured to implement the charging voltage control method of any one of claims 1 to 7.

17. A computer-readable storage medium having stored therein computer-executable instructions for implementing the charging voltage control method of any one of claims 8 to 11 when executed by a processor.

18. A computer program product, characterized in that it comprises a computer program which, when executed by a processor, implements the charging voltage control method of any one of claims 1 to 7.

19. A computer program product, characterized in that it comprises a computer program which, when executed by a processor, implements the charging voltage control method of any one of claims 8 to 11.