Vehicle charging method and device, electronic equipment and vehicle

Abstract

The application provides a vehicle-mounted charging method and device, electronic equipment and vehicle. The method comprises the following steps: determining the initial working power of the vehicle-mounted charger; reading the working efficiency data stored in the vehicle-mounted charger, and determining the high-efficiency working power corresponding to the highest working efficiency of the vehicle-mounted charger; adjusting the initial working power of the vehicle-mounted charger to the high-efficiency working power, and performing charging operation; correcting the high-efficiency working power to obtain the target working power of the vehicle-mounted charger corresponding to the highest charging efficiency of the whole vehicle, and controlling the vehicle-mounted charger to perform charging based on the target working power. In this way, the target working power of the vehicle-mounted charger corresponding to the highest charging efficiency of the whole vehicle is found through the correction of the high-efficiency working power of the vehicle-mounted charger, and then the vehicle-mounted charger is stabilized at the target working power for charging. In this way, the whole vehicle is always in the highest efficiency state for charging, and the charging efficiency of the whole vehicle is improved.

Description

Technical Field

[0001] This application relates to the field of charging control technology, and in particular to an on-board charging method, device, electronic equipment, and vehicle. Background Technology

[0002] Vehicles are equipped with onboard chargers (OBCs), which typically operate at full load. However, full load charging is not the point of maximum efficiency for OBCs.

[0003] Whether charging at full load according to the OBC or at the highest efficiency point, the overall charging efficiency of the vehicle is not good.

[0004] Therefore, improving the charging efficiency of vehicle charging has become an urgent technical problem to be solved. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide an on-board charging method, device, electronic device and vehicle to solve the technical problem of poor vehicle charging efficiency.

[0006] To achieve the above objectives, this application provides an on-board charging method, comprising:

[0007] Determine the initial operating power of the on-board charger;

[0008] Read the working efficiency data stored in the on-board charger to determine the high-efficiency working power corresponding to the highest working efficiency of the on-board charger. The working efficiency data includes the working efficiency corresponding to each working power.

[0009] The initial operating power of the on-board charger is adjusted to the high-efficiency operating power for charging operation;

[0010] The high-efficiency operating power is corrected to obtain the target operating power of the on-board charger corresponding to the highest charging efficiency of the whole vehicle, and the on-board charger is controlled to charge based on the target operating power.

[0011] Based on the same inventive concept, this application also provides an on-board charging device, comprising:

[0012] The initial operating power determination module is configured to determine the initial operating power of the on-board charger;

[0013] The high-efficiency working power determination module is configured to read the working efficiency data stored in the on-board charger and determine the high-efficiency working power corresponding to the highest working efficiency of the on-board charger. The working efficiency data includes the working efficiency corresponding to each working power.

[0014] The operating power adjustment module is configured to adjust the initial operating power of the on-board charger to the high-efficiency operating power for charging operation;

[0015] The working power correction module is configured to correct the high-efficiency working power to obtain the target working power of the on-board charger corresponding to the highest charging efficiency of the whole vehicle, and control the on-board charger to charge based on the target working power.

[0016] Based on the same inventive concept, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable by the processor, wherein the processor implements the method described above when executing the computer program.

[0017] Based on the same inventive concept, this application also provides a vehicle, including the on-board charging device as described above or the electronic device as described above.

[0018] As can be seen from the above, the on-board charging method, device, electronic device, and vehicle provided in this application adjust the initial operating power of the on-board charger to the high-efficiency operating power corresponding to the highest operating efficiency for charging operation. Then, based on this high-efficiency operating power, continuous adjustments are made to find the target operating power of the on-board charger that can meet the highest charging efficiency of the whole vehicle. In this way, the on-board charger can continue to charge based on this target operating power, thereby enabling the whole vehicle to be charged in the state of highest charging efficiency, and effectively improving the overall charging efficiency of the vehicle. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a flowchart of an embodiment of an on-board charging method according to this application;

[0021] Figure 2 This is a flowchart of another embodiment of the on-board charging method of this application;

[0022] Figure 3 This is a schematic diagram of energy flow in an embodiment of this application;

[0023] Figure 4 This is a structural block diagram of an on-board charging device according to an embodiment of this application;

[0024] Figure 5This is a schematic diagram of the structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0026] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] Definitions:

[0028] OBC: Onboard charger, refers to a charger that is fixedly installed on an electric vehicle. It has the ability to safely, quickly and conveniently fully charge the power battery. Based on the data provided by the Battery Management System (BMS), it dynamically adjusts the charging current and voltage parameters, executes the corresponding charging actions, and completes the charging process.

[0029] HVDC, or High Voltage Direct Current transmission, is a high-power, long-distance DC transmission method that utilizes the advantages of stable DC power, such as the absence of inductive and capacitive reactance and the absence of synchronization issues.

[0030] A DC / DC converter is a device that converts electrical energy from one voltage value to another in a DC circuit. It uses microelectronics technology to assemble small surface-mount integrated circuits and microelectronic components into one unit.

[0031] Currently, OBC efficiency improvements have reached a bottleneck, making further increases difficult. At present, on-board OBCs operate at almost full power (i.e., the power point corresponding to 100% load) throughout the charging process, but this full power point is not the OBC's highest efficiency point. As shown in Table 1, the full-load efficiencies for 280V, 360V, and 490V are 93.2%, 93.76%, and 94.15%, respectively, while the highest efficiency points are 94.36%, 94.56%, and 94.68%, respectively, representing increases of 1.16%, 0.8%, and 0.53% above the full-load efficiency points. Here, the OBC operating power is calculated as load rate × full-load power.

[0032] Table 1

[0033]

[0034] Therefore, charging efficiency can be improved by adjusting the output power of the OBC. However, the highest efficiency point of the OBC is not necessarily the optimal efficiency point for vehicle charging. Therefore, in order to make the vehicle charging at its optimal efficiency, it is necessary to find the OBC operating power corresponding to the optimal efficiency point of vehicle charging, so as to make the OBC work at the optimal efficiency point of vehicle charging and further improve the overall vehicle charging efficiency.

[0035] The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0036] An embodiment of this application proposes an on-board charging method, such as... Figure 1 As shown, it includes:

[0037] Step 101: Determine the initial operating power of the on-board charger.

[0038] In practice, the On-Board Charger (OBC) refers to a charger that is fixedly installed on an electric vehicle. This on-board charger is connected to the electric vehicle's battery and is used to control the battery's charging status.

[0039] Before the on-board charger can stably charge the battery, the charging voltage provided by the charging station is determined based on the specific conditions of the charging station and is therefore known. Under the current charging voltage of the charging station, it is necessary to determine the initial operating efficiency of the on-board charger.

[0040] In practice, each working efficiency corresponds to the working power of the on-board charger. After determining the initial working efficiency, the working power of the on-board motor corresponding to the initial working efficiency can be directly retrieved and used as the initial working power for the on-board charger to start working, so that the on-board charger can start charging according to the initial working power.

[0041] The initial operating power can be a preset operating power or the operating power of the on-board charger when it is fully loaded.

[0042] Step 102: Read the working efficiency data stored in the on-board charger and determine the high-efficiency working power corresponding to the highest working efficiency of the on-board charger. The working efficiency data includes the working efficiency corresponding to each working power.

[0043] In practice, the work efficiency data can be a work efficiency table formed by the work efficiency corresponding to each work power, or a work efficiency key-value pair formed by the work efficiency corresponding to each work power. The work efficiency data is stored in the on-board charger for easy access when in use.

[0044] Step 103: Adjust the initial operating power of the on-board charger to the high-efficiency operating power and start charging.

[0045] In practice, the initial operating power of the on-board charger is adjusted to a high-efficiency operating power, allowing it to operate at this high power. This high-efficiency operating power also facilitates subsequent adjustments, thereby improving the efficiency of such adjustments.

[0046] Step 104: Correct the high-efficiency working power to obtain the target working power of the on-board charger corresponding to the highest charging efficiency of the whole vehicle, and control the on-board charger to charge based on the target working power.

[0047] In practice, first determine the vehicle charging efficiency corresponding to the high-efficiency operating power. Then, adjust the power output by increasing or decreasing it based on the high-efficiency operating power, and determine the vehicle charging efficiency corresponding to each adjusted operating power. The vehicle charging efficiency corresponding to the high-efficiency operating power and the vehicle charging efficiency corresponding to each adjusted operating power can be plotted as a vehicle charging efficiency curve with operating power on the horizontal axis and vehicle charging efficiency on the vertical axis; alternatively, the vehicle charging efficiency corresponding to the high-efficiency operating power and the vehicle charging efficiency corresponding to each adjusted operating power can be created as a table; or the vehicle charging efficiency corresponding to the high-efficiency operating power and the vehicle charging efficiency corresponding to each adjusted operating power can be stored as key-value pairs.

[0048] Then, based on the vehicle charging efficiency curve, vehicle charging efficiency table, or vehicle charging efficiency key-value pair, the highest vehicle charging efficiency is determined, and the working power of the on-board charger corresponding to the highest vehicle charging efficiency is obtained as the target working power. The on-board charger performs stable charging according to the target working power, which can ensure that the vehicle is always in a state of high-efficiency charging.

[0049] The above technical solution adjusts the initial operating power of the on-board charger to the high-efficiency operating power corresponding to the highest operating efficiency. Then, it continuously corrects the power based on this high-efficiency operating power to find the target operating power of the on-board charger that meets the highest charging efficiency of the whole vehicle. In this way, the on-board charger can continue to charge based on this target operating power, so that the whole vehicle can be charged at the highest charging efficiency, and the overall charging efficiency of the vehicle can be effectively improved.

[0050] In some embodiments, step 102 includes:

[0051] Step A: Retrieve the working efficiency corresponding to each working power that matches the current charging voltage from the first working efficiency data stored in the on-board charger, and select the high-efficiency working power corresponding to the highest working efficiency under the current charging voltage.

[0052] In practice, the efficiency of the on-board charger can be tested in a laboratory beforehand at various charging voltages and corresponding power levels. This test data is then compiled into a primary efficiency data set and stored in the on-board charger. Before charging, the vehicle retrieves the efficiency data from the on-board charger for the current charging voltage and corresponding power levels, selects the highest efficiency level corresponding to the highest power level, and allows the on-board charger to operate at that high power.

[0053] Alternatively, in step B, the on-board charger is used to acquire the operating data of the power sensor at each operating power under the current charging voltage, the operating efficiency is determined based on the operating data, the operating efficiency corresponding to each operating power is stored as second operating efficiency data, and the high-efficiency operating power corresponding to the highest operating efficiency is selected from the second operating efficiency data.

[0054] In practice, since the current charging voltage of the charging pile is determined, the vehicle can collect the operating data (e.g., voltage and current) of the on-board charger under the current charging voltage through the power sensor installed on the on-board charger. In this way, the working efficiency at each working power corresponding to the current charging voltage can be obtained based on the operating data, and it can be stored in the on-board charger as a second working efficiency data.

[0055] This allows the on-board charger to select the highest efficiency power corresponding to the highest efficiency under the current charging voltage from the second efficiency data stored in the on-board charger, thus enabling the on-board charger to perform charging operations at the highest efficiency power.

[0056] The above scheme provides two methods for determining the high-efficiency working power corresponding to the highest working efficiency of the on-board charger. Users can choose the most suitable method from these two methods according to their actual needs, making it convenient to use.

[0057] In some embodiments, the process of determining the first work efficiency data includes:

[0058] Step A1: Receive the working efficiency corresponding to each charging voltage, obtained after test charging.

[0059] In practice, the on-board charger will be tested and charged in the laboratory. Various charging voltages of the on-board charger and various working powers corresponding to each charging voltage (load rate × full load working power is the corresponding working power) will be changed, and the working efficiency will be tested to obtain the working efficiency of the on-board charger for each charging voltage and the corresponding working power.

[0060] Step A2: Fit the working efficiency of each working power corresponding to each charging voltage to obtain the first working efficiency table of the on-board charger, and store the first working efficiency table as the first working efficiency data in the on-board charger.

[0061] In practice, the efficiency of each working power corresponding to each charging voltage is fitted to the working power based on the charging voltage to obtain the first efficiency table of the on-board charger; or, the working power is fitted to the charging voltage to obtain the first efficiency table of the on-board charger. The obtained first efficiency table is stored in the on-board charger as a mathematical model.

[0062] The above technical solution is used to specifically test the charging process of the on-board charger. The accuracy of the on-board charger's working efficiency corresponding to each charging voltage and the working power corresponding to each charging voltage is relatively high, which can ensure that the determined first working efficiency table is more accurate.

[0063] In some embodiments, the power sensor includes: a first voltage sensor and a first current sensor disposed on the input side of the on-board charger, and a second voltage sensor and a second current sensor disposed on the output side of the on-board charger.

[0064] The process for determining the second work efficiency data includes:

[0065] Step B1: Use the on-board charger to obtain the first voltage of the first voltage sensor on the input side corresponding to each working power under the current charging voltage, and the first current of the first current sensor on the input side.

[0066] Step B2: Calculate the input power on the input side based on the first voltage and the first current.

[0067] The product of the first voltage and the first current is the input power.

[0068] Step B3: Use the on-board charger to obtain the second voltage of the second voltage sensor on the output side corresponding to each working power under the current charging voltage, and obtain the second current of the second current sensor on the output side.

[0069] Step B4: Calculate the output power on the output side based on the second voltage and the second current, and use the ratio of the output power to the input power as the operating efficiency.

[0070] The product of the second voltage and the second current is the input power.

[0071] Step B5: Fit the working efficiency corresponding to each working power into a second working efficiency table, and store the second working efficiency table as the second working efficiency data in the on-board charger.

[0072] In practice, the working power of the current charging voltage is fitted and plotted into a second working efficiency table. The working power of the second working efficiency table is listed as a ratio; or the ratio of the working power of the second working efficiency table is listed as the working power.

[0073] With the above scheme, even without laboratory testing of the on-board charger, a second working efficiency table can be obtained as working efficiency data by using the first voltage sensor and the first current sensor set on the input side of the on-board charger, and the second voltage sensor and the second current sensor set on the output side of the on-board charger, according to the above steps B1 to B5. This makes it easier to find the high-efficiency working power corresponding to the highest working efficiency under the current charging voltage from the second working efficiency table.

[0074] In some embodiments, step 104 involves correcting the high-efficiency operating power to obtain the target operating power of the on-board charger corresponding to the highest charging efficiency of the entire vehicle, including:

[0075] Step 1041: During the charging process of the on-board charger according to the high-efficiency working power, the first power consumption of the power converter corresponding to the high-efficiency working power is obtained, wherein the power converter is connected to the output terminal of the on-board charger.

[0076] Step 1042: Determine the first vehicle charging efficiency of the on-board charger at the high-efficiency operating power based on the high-efficiency operating power and the first power consumption.

[0077] In practice, the charging efficiency of the on-board charger is used to obtain the first power consumption of the power converter at this time. In this way, the first vehicle charging efficiency can be calculated using the vehicle charging efficiency formula based on the high-efficiency operating power and the first power consumption.

[0078] Step 1043: Based on the high-efficiency operating power, make a correction by increasing or decreasing the power to obtain the corrected operating power, and obtain the second power consumption of the power converter corresponding to the corrected operating power.

[0079] After charging at high efficiency, the on-board charger adjusts the power output by increasing or decreasing it. This adjustment can be achieved by increasing the power output by a predetermined value at predetermined intervals (e.g., 10ms or 20ms) from the initial operating power until the full-load power is reached. Then, the power output is decreased by a predetermined value at predetermined intervals (e.g., 10ms or 20ms) from the high efficiency operating power until the minimum operating power is reached.

[0080] Alternatively, based on the high-efficiency operating power, the power value can be reduced by a predetermined value at predetermined intervals (e.g., 10ms, 20ms) until the minimum operating power is reached. Then, based on the high-efficiency operating power, the power value can be increased by a predetermined value at predetermined intervals (e.g., 10ms, 20ms) until the full-load operating power is reached.

[0081] Because the operating power of the on-board charger is being adjusted, the power consumption of the power converter will also be adjusted accordingly. The power consumption of the power converter is also a part of the overall vehicle charging efficiency, so it is necessary to detect the second power consumption corresponding to each adjusted operating power.

[0082] Step 1044: Determine the second vehicle charging efficiency of the on-board charger under the corrected operating power based on the corrected operating power and the second power consumption.

[0083] In practice, the second vehicle charging efficiency can be calculated using the same formula as the vehicle charging efficiency, based on the modified operating power and the second power consumption.

[0084] Step 1045: Determine the highest vehicle charging efficiency from the first vehicle charging efficiency and the second vehicle charging efficiency, and retrieve the target operating power of the on-board charger corresponding to the highest vehicle charging efficiency.

[0085] The above scheme can be used to find the highest charging efficiency of the whole vehicle based on the correction of the on-board charger to the high-efficiency working power, and then the corresponding working power of the on-board charger can be used as the target working power for the on-board charger to achieve stable charging in the future. The whole correction process is convenient and simple to operate.

[0086] In some embodiments, the process of obtaining the first power consumption or the second power consumption includes:

[0087] Step C: When it is determined that the on-board charger and the power converter are in independent states, the on-board charger receives the first power consumption or the second power consumption of the power converter sent by the power converter through the signal harness.

[0088] In practice, the on-board charger and the power converter are both independent (i.e., they are separate and operate independently). The on-board charger is connected to the power converter (DC / DC converter, a device that converts electrical energy from one voltage value to another in a DC circuit) via a wiring harness. The power converter transmits its first or second power consumption to the on-board charger through the wiring harness. During the on-board charger's high-efficiency operating power correction process, it receives a second power consumption value through the wiring harness for each correction.

[0089] Alternatively, in step D, when it is determined that the on-board charger and the power converter are integrated, the on-board charger can be used to directly access the first power consumption or the second power consumption of the power converter.

[0090] In practice, both the on-board charger and the power converter are integrated (i.e., the power converter is integrated into the on-board charger). This allows the on-board charger to directly collect either the first or second power consumption of the power converter. Specifically, during the on-board charger's high-efficiency operating power correction process, a second power consumption is collected after each correction.

[0091] With the above solution, the power consumption of the power converter (first power consumption or second power consumption) can be accurately obtained regardless of the state of the on-board charger and the power converter, thus ensuring the effectiveness of the power consumption of the power converter.

[0092] In some embodiments, the process of determining the first vehicle charging efficiency or the second vehicle charging efficiency includes:

[0093] The first or second vehicle charging efficiency is determined using a vehicle charging efficiency formula, which is:

[0094] η Veh =[(P OBC -P DC ) / P OBC ]×η OBC .

[0095] Where, η OBCη is the output efficiency of the on-board charger. Veh When calculating the first vehicle charging efficiency: P OBC For high-efficiency operation, P DC The first power consumption; η Veh When calculating the second vehicle charging efficiency: P OBC For the corrected operating power, P DC This is the second power consumption.

[0096] The above scheme allows for the accurate calculation of the first or second vehicle charging efficiency based on the vehicle charging efficiency formula. This ensures that the highest vehicle charging efficiency found from the first and second vehicle charging efficiencies is more accurate, thereby making the target operating power of the on-board charger for stable charging more accurate.

[0097] The on-board charging method of this application is described below with reference to a specific embodiment.

[0098] 1. OBC identifies its own highest efficiency point, as shown in Table 2 below.

[0099] Table 2

[0100]

[0101]

[0102] 2. Select the point of highest efficiency for vehicle charging.

[0103] If the on-board charger (OBC) reduces its power to operate at its highest efficiency, charging time will increase. Furthermore, the presence of low-voltage electrical components in the vehicle will lead to increased low-voltage energy consumption. Therefore, the highest efficiency point of the OBC is not necessarily the highest efficiency point for the entire vehicle's charging process; thus, optimal calculation of the overall vehicle efficiency is required.

[0104] According to the direction of vehicle energy flow, such as Figure 2 As shown, the process is as follows:

[0105] S1, the on-board charger (OBC) begins initial charging operation based on a predetermined initial operating power. This initial operating power can be either pre-set or the full-load operating power.

[0106] S2, based on the working efficiency table, determine the high-efficiency working power corresponding to the highest working efficiency under the current charging voltage, adjust the working power of the on-board charger (OBC) from the initial working power to the high-efficiency working power, and start charging.

[0107] S3, the on-board charger (OBC) obtains the power consumed by the DC / DC converter.

[0108] S4 calculates the vehicle charging efficiency based on the output power of the on-board charger (OBC) and the power consumption of the DC / DC converter.

[0109] like Figure 3 As shown, the formula for calculating the overall vehicle charging efficiency is:

[0110] η Veh =[(P OBC -P DC ) / P OBC ]×η OBC .

[0111] η Veh Overall vehicle charging efficiency, P OBC : OBC output power, η OBC OBC output efficiency, P DC : DC / DC power consumption.

[0112] S5, correct the working power of the on-board charger (OBC), and then return to step S3.

[0113] S6. After all the working power of the on-board charger (OBC) has been corrected, find the highest value of the overall vehicle charging efficiency (i.e., the highest overall vehicle charging efficiency) from the overall vehicle charging efficiency corresponding to each working power of the determined on-board charger (OBC). Use the working power of the on-board charger corresponding to the highest value of the overall vehicle charging efficiency as the target working power, and make the on-board charger (OBC) perform stable charging work according to the target working power.

[0114] Among them, P OBC η OBC If all quantities are known, then we need to obtain P. DC The information can be obtained through the following method: Table 3:

[0115] Table 3

[0116] Scenario 2: OBC and DC / DC are integrated. <![CDATA[The OBC directly collects and acquires the power P at the DC / DC terminal DC >

[0117] It should be noted that the method in this embodiment can be executed by a single device, such as a computer or server. The method can also be applied in a distributed scenario, where multiple devices cooperate to complete the task. In such a distributed scenario, one of these devices may execute only one or more steps of the method in this embodiment, and the multiple devices will interact with each other to complete the method described.

[0118] It should be noted that the above description describes some embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0119] Based on the same inventive concept, corresponding to any of the above embodiments, this application also provides an on-board charging device.

[0120] refer to Figure 4 The device includes:

[0121] The initial operating power determination module 301 is configured to determine the initial operating power of the on-board charger;

[0122] The high-efficiency working power determination module 302 is configured to read the working efficiency data stored in the on-board charger and determine the high-efficiency working power corresponding to the highest working efficiency of the on-board charger. The working efficiency data includes the working efficiency corresponding to each working power.

[0123] The working power adjustment module 303 is configured to adjust the initial working power of the on-board charger to the high-efficiency working power for charging operation;

[0124] The working power correction module 304 is configured to correct the high-efficiency working power to obtain the target working power of the on-board charger corresponding to the highest charging efficiency of the whole vehicle, and control the on-board charger to charge based on the target working power.

[0125] In some embodiments, the high-efficiency operating power determination module 302 is specifically configured as follows:

[0126] From the first working efficiency data stored in the on-board charger, retrieve the working efficiency corresponding to each working power that matches the current charging voltage, and select the high-efficiency working power corresponding to the highest working efficiency under the current charging voltage.

[0127] or,

[0128] The on-board charger is used to acquire the operating data of the power sensor at various operating power levels under the current charging voltage. The operating efficiency is determined based on the operating data. The operating efficiency corresponding to each operating power is stored as second operating efficiency data. The high-efficiency operating power corresponding to the highest operating efficiency is selected from the second operating efficiency data.

[0129] In some embodiments, the apparatus further includes a work efficiency data determination module, configured to:

[0130] Receive the working efficiency of each working power corresponding to each charging voltage obtained after testing and charging.

[0131] The working efficiency of each working power corresponding to each charging voltage is fitted to obtain the first working efficiency table of the on-board charger, and the first working efficiency table is stored in the on-board charger as the first working efficiency data.

[0132] In some embodiments, the power sensor includes: a first voltage sensor and a first current sensor disposed on the input side of the on-board charger, and a second voltage sensor and a second current sensor disposed on the output side of the on-board charger;

[0133] The work efficiency data determination module is also configured as follows:

[0134] The on-board charger is used to obtain the first voltage of the first voltage sensor on the input side corresponding to each working power under the current charging voltage, and the first current of the first current sensor on the input side.

[0135] Calculate the input power on the input side based on the first voltage and the first current;

[0136] The on-board charger is used to obtain the second voltage of the second voltage sensor on the output side corresponding to each working power under the current charging voltage, and to obtain the second current of the second current sensor on the output side.

[0137] The output power on the output side is calculated based on the second voltage and the second current, and the ratio of the output power to the input power is used as the working efficiency.

[0138] The working efficiency corresponding to each working power is fitted into a second working efficiency table, and the second working efficiency table is stored in the on-board charger as the second working efficiency data.

[0139] In some embodiments, the operating power correction module 304 is further configured to:

[0140] During the charging process of the on-board charger according to the high-efficiency working power, the first power consumption of the power converter corresponding to the high-efficiency working power is obtained, wherein the power converter is connected to the output terminal of the on-board charger;

[0141] Based on the high-efficiency operating power and the first power consumption, the first vehicle charging efficiency of the on-board charger under the high-efficiency operating power is determined;

[0142] Based on the high-efficiency operating power, the power is increased or decreased to obtain the corrected operating power, and the second power consumption of the power converter corresponding to the corrected operating power is obtained.

[0143] Based on the corrected operating power and the second power consumption, the second vehicle charging efficiency of the on-board charger under the corrected operating power is determined;

[0144] The highest vehicle charging efficiency is determined from the first vehicle charging efficiency and the second vehicle charging efficiency, and the target operating power of the on-board charger corresponding to the highest vehicle charging efficiency is retrieved.

[0145] In some embodiments, the operating power correction module 304 is further configured to:

[0146] When it is determined that the on-board charger and the power converter are in independent states, the on-board charger receives the first or second power consumption of the power converter sent by the power converter through the signal harness; or...

[0147] When it is determined that the on-board charger and the power converter are integrated, the first power consumption or the second power consumption of the power converter can be directly accessed by the on-board charger.

[0148] In some embodiments, the working power correction module 304 stores a vehicle charging efficiency formula, and the working power correction module 304 is further configured to:

[0149] The first or second vehicle charging efficiency is determined using a vehicle charging efficiency formula, which is:

[0150] η Veh =[(P OBC -P DC ) / P OBC ]×η OBC ,

[0151] Where, η OBC η is the output efficiency of the on-board charger. Veh When calculating the first vehicle charging efficiency: P OBC For high-efficiency operation, P DC The first power consumption; η Veh When calculating the second vehicle charging efficiency: P OBC For the corrected operating power, P DC This is the second power consumption.

[0152] For ease of description, the above devices are described in terms of function, divided into various modules. Of course, in implementing this application, the functions of each module can be implemented in one or more software and / or hardware.

[0153] The apparatus of the above embodiments is used to implement the corresponding method in any of the foregoing embodiments and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0154] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the methods described in any of the above embodiments.

[0155] Figure 5 This embodiment illustrates a more specific hardware structure of an electronic device, which may include a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, memory 1020, input / output interface 1030, and communication interface 1040 are interconnected internally via the bus 1050.

[0156] The processor 1010 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0157] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program code is stored in the memory 1020 and is called and executed by the processor 1010.

[0158] The input / output interface 1030 is used to connect input / output modules to realize information input and output. Input / output modules can be configured as components within the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Input devices may include keyboards, mice, touchscreens, microphones, various sensors, etc., while output devices may include displays, speakers, vibrators, indicator lights, etc.

[0159] The communication interface 1040 is used to connect a communication module (not shown in the figure) to enable communication between this device and other devices. The communication module can communicate via wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0160] Bus 1050 includes a pathway for transmitting information between various components of the device, such as processor 1010, memory 1020, input / output interface 1030, and communication interface 1040.

[0161] It should be noted that although the above-described device only shows the processor 1010, memory 1020, input / output interface 1030, communication interface 1040, and bus 1050, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above-described device may only include the components necessary for implementing the embodiments of this specification, and not necessarily all the components shown in the figures.

[0162] The electronic devices described above are used to implement the corresponding methods in any of the foregoing embodiments and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0163] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides a non-transitory computer-readable storage medium that stores computer instructions for causing the computer to perform the methods described in any of the above embodiments.

[0164] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0165] The computer instructions stored in the storage medium of the above embodiments are used to cause the computer to perform the methods described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0166] Based on the same concept, corresponding to any of the above embodiments, this application also provides a computer program product, including computer program instructions, which, when run on a computer, cause the computer to perform the method described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0167] Based on the same inventive concept, this application also provides a vehicle including the on-board charging device or the electronic device described in the above embodiments. The beneficial effects of embodiments with corresponding on-board charging devices or electronic devices will not be elaborated further here.

[0168] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in the details for the sake of brevity.

[0169] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this application, the well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. Furthermore, the apparatus may be shown in block diagram form to avoid obscuring the embodiments of this application, and this also takes into account the fact that the details of the implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this application will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details (e.g., circuits) have been set forth to describe exemplary embodiments of this application, it will be apparent to those skilled in the art that the embodiments of this application can be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0170] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0171] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A method of charging a vehicle, characterized by, include: Determine the initial operating power of the on-board charger; Read the working efficiency data stored in the on-board charger to determine the high-efficiency working power corresponding to the highest working efficiency of the on-board charger. The working efficiency data includes the working efficiency corresponding to each working power. The initial operating power of the on-board charger is adjusted to the high-efficiency operating power for charging operation; During the charging process of the on-board charger according to the high-efficiency working power, the first power consumption of the power converter corresponding to the high-efficiency working power is obtained, wherein the power converter is connected to the output terminal of the on-board charger; Based on the high-efficiency operating power and the first power consumption, the first vehicle charging efficiency of the on-board charger under the high-efficiency operating power is determined; Based on the high-efficiency operating power, the power is increased or decreased to obtain the corrected operating power, and the second power consumption of the power converter corresponding to the corrected operating power is obtained. Based on the corrected operating power and the second power consumption, the second vehicle charging efficiency of the on-board charger under the corrected operating power is determined; The highest vehicle charging efficiency is determined from the first vehicle charging efficiency and the second vehicle charging efficiency, and the target operating power of the on-board charger corresponding to the highest vehicle charging efficiency is retrieved.

2. The method according to claim 1, characterized in that, The step of reading the operating efficiency data stored in the on-board charger and determining the high-efficiency operating power corresponding to the highest operating efficiency of the on-board charger includes: From the first working efficiency data stored in the on-board charger, retrieve the working efficiency corresponding to each working power that matches the current charging voltage, and select the high-efficiency working power corresponding to the highest working efficiency under the current charging voltage. or, The on-board charger is used to acquire the operating data of the power sensor at various operating power levels under the current charging voltage. The operating efficiency is determined based on the operating data, and the operating efficiency corresponding to each operating power is stored as second operating efficiency data. The high-efficiency operating power corresponding to the highest operating efficiency is selected from the second operating efficiency data.

3. The method according to claim 2, characterized in that, The process of determining the first work efficiency data includes: Receive the working efficiency of each working power corresponding to each charging voltage obtained after testing and charging. The working efficiency of each working power corresponding to each charging voltage is fitted to obtain the first working efficiency table of the on-board charger, and the first working efficiency table is stored in the on-board charger as the first working efficiency data.

4. The method according to claim 2, characterized in that, The power sensor includes: a first voltage sensor and a first current sensor disposed on the input side of the on-board charger, and a second voltage sensor and a second current sensor disposed on the output side of the on-board charger; The process of determining the second work efficiency data includes: The on-board charger is used to obtain the first voltage of the first voltage sensor on the input side corresponding to each working power under the current charging voltage, and the first current of the first current sensor on the input side. Calculate the input power on the input side based on the first voltage and the first current; The on-board charger is used to obtain the second voltage of the second voltage sensor on the output side corresponding to each working power under the current charging voltage, and to obtain the second current of the second current sensor on the output side. The output power on the output side is calculated based on the second voltage and the second current, and the ratio of the output power to the input power is used as the working efficiency. The working efficiency corresponding to each working power is fitted into a second working efficiency table, and the second working efficiency table is stored in the on-board charger as the second working efficiency data.

5. The method of claim 1, wherein, The process of obtaining the first power consumption or the second power consumption includes: When the on-board charger and the power converter are determined to be in independent states, the on-board charger receives the first power consumption or the second power consumption from the power converter via a signal harness; or... When it is determined that the on-board charger and the power converter are integrated, the first power consumption or the second power consumption of the power converter can be directly accessed by the on-board charger.

6. The method of claim 1, wherein, The process of determining the first or second vehicle charging efficiency includes: The first or second vehicle charging efficiency is determined using a vehicle charging efficiency formula, which is: ， Where, η OBC η is the output efficiency of the on-board charger. Veh When calculating the first vehicle charging efficiency: P OBC For high-efficiency operation, P DC The first power consumption; η Veh When calculating the second vehicle charging efficiency: P OBC For the corrected operating power, P DC This is the second power consumption.

7. An in-vehicle charging device characterized by comprising: include: The initial operating power determination module is configured to determine the initial operating power of the on-board charger; The high-efficiency working power determination module is configured to read the working efficiency data stored in the on-board charger and determine the high-efficiency working power corresponding to the highest working efficiency of the on-board charger. The working efficiency data includes the working efficiency corresponding to each working power. The operating power adjustment module is configured to adjust the initial operating power of the on-board charger to the high-efficiency operating power for charging operation; A power correction module is configured to: acquire a first power consumption of a power converter corresponding to the high-efficiency working power during the charging process of the on-board charger at the high-efficiency working power, wherein the power converter is connected to the output terminal of the on-board charger; determine a first vehicle charging efficiency of the on-board charger at the high-efficiency working power based on the high-efficiency working power and the first power consumption; perform a power increase or decrease correction based on the high-efficiency working power to obtain a corrected working power, and acquire a second power consumption of the power converter corresponding to the corrected working power; determine a second vehicle charging efficiency of the on-board charger at the corrected working power based on the corrected working power and the second power consumption; determine the highest vehicle charging efficiency from the first vehicle charging efficiency and the second vehicle charging efficiency, and retrieve the target working power of the on-board charger corresponding to the highest vehicle charging efficiency.

8. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the method as described in any one of claims 1 to 6.

9. A vehicle characterized by comprising: include: The on-board charging device of claim 7 or the electronic device of claim 8.

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