Recharge control method, device, electronic device, storage medium and program product

Abstract

The present application discloses a recharge control method, device, electronic device, storage medium and program product, the recharge control method comprising: when the vehicle enters the braking mode, obtaining the measured value of the target state parameter of the vehicle in the current state; determining the current maximum relaxation value of the anode potential of the battery in the vehicle according to the measured value of the target state parameter and the preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential; determining the recharge current value corresponding to the current maximum relaxation value of the anode potential based on the first mapping relationship between the charging current and the maximum relaxation value of the anode potential; determining the recharge power of the battery according to the recharge current value, and charging the battery according to the recharge power. In this way, without changing the battery cell design and without increasing additional costs, the energy recovery efficiency of the vehicle can be improved, thereby increasing the vehicle's cruising range.

Description

Technical Field

[0001] The present application relates to the field of battery recharging technology, and in particular to a recharging control method, device, electronic device, storage medium and program product. Background Art

[0002] With the continuous development of new energy technologies, new energy vehicles have been widely used due to their economy and environmental protection. When a new energy vehicle is braking, the kinetic energy generated by braking can be converted into electrical energy and recharged into the vehicle battery, thereby realizing the recharging control of the vehicle battery. However, the current contribution rate of energy recovery of new energy vehicles to the mileage of the New European Driving Cycle (NEDC) is about 15%, but energy recovery can theoretically increase the vehicle's driving range by 33%. It can be seen that the energy recovery efficiency of new energy vehicles is low. Summary of the invention

[0003] The present application proposes a recharging control method, device, electronic device, storage medium and program product, which can improve the energy recovery efficiency of a vehicle and thereby increase the vehicle's cruising range.

[0004] The technical solution of this application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a recharge control method, the recharge control method comprising:

[0006] When the vehicle enters the braking mode, the actual measured value of the target state parameter of the vehicle in the current state is obtained;

[0007] Determining a current maximum relaxation value of an anode potential of a battery in the vehicle according to a measured value of a target state parameter and a preset mapping relationship between the target state parameter and a maximum relaxation value of an anode potential;

[0008] Determine the recharge current value corresponding to the current maximum relaxation value of the anode potential based on a first mapping relationship between the charging current and the maximum relaxation value of the anode potential;

[0009] The recharge power of the battery is determined according to the recharge current value, and the battery is charged according to the recharge power.

[0010] Through the above technical means, when the vehicle enters the braking mode, the maximum relaxation value of the current anode potential of the battery in the vehicle is determined according to the actual measured value of the target state parameter and the preset mapping relationship between the target state parameter and the maximum relaxation value of the anode, and then the recharge current value corresponding to the current maximum relaxation value of the anode potential is determined according to the first mapping relationship between the charging current and the maximum relaxation value of the anode potential; then the recharge power of the battery is determined according to the recharge current value, and the battery is charged according to the recharge power. In this way, by relaxing the anode potential of the battery without changing the battery cell and without increasing additional costs, the recharge current can be increased, the recharge power is increased, and the energy recovery efficiency of the vehicle can be improved.

[0011] In some embodiments, the target state parameter includes at least one of the following: battery temperature, battery remaining power, and pulse charging time.

[0012] Through the above-mentioned technical means, by establishing a preset mapping relationship related to target state parameters such as battery temperature, battery remaining power and pulse charging time, the maximum relaxation value of the battery anode can be accurately determined, thereby improving the energy recovery efficiency of the vehicle.

[0013] In some embodiments, the recharge control method also includes: based on multiple sets of test data of target state parameters, obtaining the initial anode potential values ​​corresponding to each of the batteries under the multiple sets of test data; determining the charging current corresponding to each of the multiple sets of test data according to the charging window corresponding to the preset pulse charging time and the initial anode potential value; determining the maximum relaxation value of the anode potential corresponding to each of the multiple sets of test data according to a first mapping relationship between the charging current and the maximum relaxation value of the anode potential; and establishing a preset mapping relationship between the target state parameters and the maximum relaxation value of the anode potential corresponding to each of the multiple sets of test data.

[0014] Through the above technical means, the initial anode potential values ​​corresponding to each of the multiple test data before charging are first determined, and then the charging currents corresponding to each of the multiple test data after the preset pulse charging time are determined, and according to the first mapping relationship between the charging current and the maximum relaxation value of the anode potential, the maximum relaxation value of the anode potential corresponding to each of the multiple test data is determined, and finally the preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential is established. In this way, the preset mapping relationship is established through the multiple test data under the target state parameter, and then the maximum relaxation value of the anode of the battery in the current state can be accurately determined according to the preset mapping relationship, thereby improving the energy recovery efficiency of the vehicle.

[0015] In some embodiments, the charging current corresponding to each of the multiple sets of test data is determined based on the charging window corresponding to the preset pulse charging time and the initial anode potential value, including: at the preset temperature of the battery, based on the first mapping relationship between the charging current and the maximum relaxation value of the anode potential, determining the second mapping relationship between the charging current and the first polarization after the preset pulse charging time; determining the third mapping relationship between the charging current and the second polarization at the preset temperature of the battery; when the preset conditions are met between the initial anode potential value, the second mapping relationship and the third mapping relationship, determining the charging current corresponding to each of the multiple sets of test data.

[0016] Through the above-mentioned technical means, at the preset temperature of the battery, the second mapping relationship between the charging current and the first polarization after the preset pulse charging time is determined according to the first mapping relationship, and then the third mapping relationship between the charging current and the second polarization at the preset temperature of the battery is determined; in this way, when the preset conditions are met between the initial anode potential value, the second mapping relationship and the third mapping relationship, the charging current corresponding to each of the multiple groups of test data can be determined, and then the preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential can be established, and the current maximum relaxation value of the anode of the battery can be accurately determined according to the preset mapping relationship, thereby improving the energy recovery efficiency of the vehicle.

[0017] In some embodiments, based on a first mapping relationship between the charging current and the maximum relaxation value of the anode potential, a second mapping relationship between the charging current and the first polarization after a preset pulse charging time is determined, including: based on the first mapping relationship between the charging current and the maximum relaxation value of the anode potential, determining the first polarization values ​​corresponding to different charging currents after the preset pulse charging time; and fitting according to the first polarization values ​​corresponding to different charging currents to establish a second mapping relationship between the charging current and the first polarization.

[0018] Through the above-mentioned technical means, the first polarization values ​​corresponding to different charging currents after the preset pulse charging time are determined according to the first mapping relationship, and fitting is performed according to the first polarization values ​​corresponding to different charging currents to accurately establish the second mapping relationship between the charging current and the first polarization, thereby improving the accuracy of the preset mapping relationship.

[0019] In some embodiments, based on a first mapping relationship between the charging current and the maximum relaxation value of the anode potential, a first polarization value corresponding to different charging currents after a preset pulse charging time is determined, including: based on the first mapping relationship between the charging current and the maximum relaxation value of the anode potential, a fourth mapping relationship between the anode potential under different charging currents and the logarithmic function of the preset pulse charging time is established; and the intercept of the fourth mapping relationship is determined as the first polarization value corresponding to the different charging currents.

[0020] Through the above-mentioned technical means, a fourth mapping relationship between the anode potential under different charging currents and the logarithmic function of the preset pulse charging time is established according to the first mapping relationship, and the intercept of the fourth mapping relationship is used as the first polarization value corresponding to the different charging currents. In this way, the second mapping relationship between the charging current and the first polarization can be accurately established, thereby improving the accuracy of the preset mapping relationship.

[0021] In some embodiments, determining a third mapping relationship between the charging current and the second polarization at a preset temperature of the battery includes: determining polarization potential values ​​corresponding to different charging currents at the preset temperature of the battery based on a first mapping relationship between the charging current and the maximum relaxation value of the anode potential; determining second polarization values ​​corresponding to different charging currents at the preset temperature of the battery based on the polarization potential values ​​corresponding to different charging currents and the first polarization values ​​corresponding to different charging currents; and determining the third mapping relationship between the charging current and the second polarization by fitting the second polarization values ​​corresponding to different charging currents.

[0022] Through the above-mentioned technical means, the polarization potentials corresponding to different charging currents are determined according to the first mapping relationship at the preset temperature of the battery, and the second polarization values ​​corresponding to different charging currents at the preset temperature of the battery are determined according to the polarization potential values ​​corresponding to different charging currents and the first polarization values. Then, fitting is performed according to the second polarization values ​​corresponding to different charging currents, so that the third mapping relationship between the charging current and the second polarization can be accurately established, thereby also improving the accuracy of the preset mapping relationship.

[0023] In some embodiments, when a preset condition is satisfied between the initial anode potential value, the second mapping relationship, and the third mapping relationship, the charging current corresponding to each of the multiple sets of test data is determined, including: when a preset equation is satisfied between the initial anode potential value, the second mapping relationship, and the third mapping relationship, the preset equation is solved, and the calculation result is determined as the charging current corresponding to each of the multiple sets of test data.

[0024] Through the above-mentioned technical means, when the preset equation is satisfied between the initial anode potential value, the second mapping relationship and the third mapping relationship, the preset equation is solved and the calculation result is determined as the charging current corresponding to each of the multiple groups of test data. In this way, a preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential can be established. According to the preset mapping relationship, the current maximum relaxation value of the anode of the battery can be accurately determined, thereby improving the energy recovery efficiency of the vehicle.

[0025] In a second aspect, an embodiment of the present application provides a recharge control device, the device comprising an acquisition unit, a determination unit and a charging unit, wherein:

[0026] an acquisition unit, configured to acquire a measured value of a target state parameter of the vehicle in a current state when the vehicle enters a braking mode;

[0027] a determination unit configured to determine a current maximum relaxation value of an anode potential of a battery in a vehicle according to an actual measured value of a target state parameter and a preset mapping relationship between the target state parameter and the maximum relaxation value of an anode potential; and to determine a recharge current value corresponding to the current maximum relaxation value of an anode potential based on a first mapping relationship between a charging current and the maximum relaxation value of an anode potential;

[0028] The charging unit is configured to determine the recharging power of the battery according to the recharging current value, and charge the battery according to the recharging power.

[0029] Through the above technical means, when the vehicle enters the braking mode, the acquisition unit is used to obtain the actual measured value of the target state parameter of the vehicle in the current state; then the determination unit is used to determine the current maximum relaxation value of the anode potential of the battery in the vehicle according to the actual measured value of the target state parameter and the preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential, and then based on the first mapping relationship between the charging current and the maximum relaxation value of the anode potential, the recharge current value corresponding to the current maximum relaxation value of the anode potential is determined, and then the charging unit is used to determine the recharge power of the battery according to the current maximum relaxation value of the anode potential, and the battery is charged according to the recharge power. In this way, by relaxing the anode potential of the battery without changing the battery cell and increasing additional costs, the recharge current can be increased, the recharge power is increased, and the energy recovery efficiency of the vehicle can be improved.

[0030] In a third aspect, an embodiment of the present application provides an electronic device, the electronic device comprising a memory and a processor, wherein:

[0031] A memory for storing computer programs that can be run on the processor;

[0032] A processor is used to execute the recharge control method as described in any one of the first aspects when running a computer program.

[0033] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the recharge control method as described in any one of the first aspects.

[0034] In a fifth aspect, an embodiment of the present application provides a computer program product, which includes a computer program or instructions. When the computer program or instructions are executed by a processor, the recharge control method described in any one of the first aspects is implemented.

[0035] The embodiment of the present application proposes a recharge control method, device, electronic device, storage medium and program product. When the vehicle enters the braking mode, the maximum relaxation value of the current anode potential of the battery in the vehicle is determined according to the actual measured value of the target state parameter and the preset mapping relationship between the target state parameter and the maximum relaxation value of the anode. Then, based on the first mapping relationship between the charging current and the maximum relaxation value of the anode potential, the recharge current value corresponding to the current maximum relaxation value of the anode potential is determined. Then, according to the recharge current value, the recharge power of the battery is determined, and the battery is charged according to the recharge power. In this way, by relaxing the anode potential of the battery without changing the battery cell and without increasing additional costs, the recharge current can be increased, so that the recharge power is increased, thereby improving the energy recovery efficiency of the vehicle and also improving the vehicle's cruising range. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A flow chart of a recharge control method provided in an embodiment of the present application Figure 1 ;

[0037] Figure 2 A flow chart of a recharge control method provided in an embodiment of the present application Figure 2 ;

[0038] Figure 3 A schematic diagram of a mapping relationship between a charging rate and an anode potential provided in an embodiment of the present application;

[0039] Figure 4 A flow chart of a recharge control method provided in an embodiment of the present application Figure 3 ;

[0040] Figure 5 A flow chart of a recharge control method provided in an embodiment of the present application Figure 4 ;

[0041] Figure 6 A flow chart of a recharge control method provided in an embodiment of the present application Figure 5 ;

[0042] Figure 7 A schematic diagram of a mapping relationship between an anode potential under different charging currents and a logarithmic function of a preset pulse charging time provided in an embodiment of the present application;

[0043] Figure 8 A schematic diagram of a mapping relationship between a charging rate and a first polarization provided in an embodiment of the present application;

[0044] Fig. 9 A flow chart of a recharge control method provided in an embodiment of the present application Figure 6 ;

[0045] Fig.10 A flow chart of a recharge control method provided in an embodiment of the present application Figure 7 ;

[0046] Fig.11 A schematic diagram of a mapping relationship between an initial anode potential and a remaining charge provided in an embodiment of the present application;

[0047] Fig.12 A schematic diagram of a power benefit provided in an embodiment of the present application Figure 1 ;

[0048] Fig.13 A schematic diagram of a power benefit provided in an embodiment of the present application Figure 2 ;

[0049] Fig.14 A schematic diagram of the structure of a recharging control device provided in an embodiment of the present application;

[0050] Fig.15 A schematic diagram of a specific hardware structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0053] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0054] It should also be pointed out that the terms "first\second\third" involved in the embodiments of the present application are only used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0055] In addition, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] The following is an introduction to the related technologies of this application.

[0057] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in areas such as energy storage.

[0058] At present, new energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0059] In the embodiments of the present application, the battery may be a battery cell. A battery cell refers to a basic unit that can realize the mutual conversion of chemical energy and electrical energy, and can be used to make a battery module or a battery pack, so as to supply power to an electrical device. A battery cell may be a secondary battery, which refers to a battery cell that can be continuously used by activating the active material by charging after the battery cell is discharged. The battery cell may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., which is not limited here.

[0060] In the embodiment of the present application, the battery may also be a single physical module including one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in hybrid connection through a busbar component.

[0061] Furthermore, with the continuous development of new energy technologies, new energy vehicles have been widely used due to their economy and environmental protection. When a new energy vehicle is braking, the kinetic energy generated by braking can be converted into electrical energy and recharged into the vehicle battery, thereby realizing the recharging control of the vehicle battery. However, the current contribution rate of energy recovery of new energy vehicles to the mileage of the New European Driving Cycle (NEDC) is about 15%, but energy recovery can theoretically increase the vehicle's driving range by 33%. It can be seen that the energy recovery efficiency of new energy vehicles in related technologies is low.

[0062] In one possible implementation, when the vehicle is braking or coasting, a large recharge current will affect the battery life and cause some energy to be unable to be recovered. In particular, polarization is aggravated at low temperatures, resulting in a small recharge current, making it difficult to recover some kinetic energy during actual use, resulting in limited power gains. If this energy can be fully utilized, it will help to increase the range of electric vehicles and reduce energy consumption per 100 kilometers.

[0063] Based on this, the embodiment of the present application provides a recharge control method, when the vehicle enters the braking mode, the actual measured value of the target state parameter of the vehicle in the current state is obtained; according to the actual measured value of the target state parameter and the preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential, the current maximum relaxation value of the anode potential of the battery in the vehicle is determined; according to the current maximum relaxation value of the anode potential, the recharge power of the battery is determined, and the battery is charged according to the recharge power. In this way, the recharge current can be increased by relaxing the anode potential without changing the battery cell and increasing additional costs, so that the recharge power is increased, thereby improving the energy recovery efficiency of the vehicle, and then improving the vehicle's cruising range.

[0064] The various embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0065] In one embodiment of the present application, Figure 1 A flow chart of a recharge control method provided in an embodiment of the present application Figure 1 .like Figure 1 As shown, the recharge control method may include steps S101 to S103, which are specifically as follows:

[0066] S101, when the vehicle enters a braking mode, obtaining actual measured values ​​of target state parameters of the vehicle in the current state.

[0067] In the embodiment of the present application, the braking mode refers to a working mode for controlling a moving vehicle to stop or decelerate. Braking energy is the electrical energy converted from the kinetic energy of the vehicle during braking. For example, the vehicle may be an electric vehicle. When the electric vehicle enters a downhill slope, decelerates or brakes, part of the mechanical energy will be converted into electrical energy for recycling. The converted electrical energy will be charged back and forth into the battery of the electric vehicle, which can increase the range of the electric vehicle, thereby achieving the purpose of energy recovery.

[0068] In the embodiment of the present application, the target state parameter includes at least one of the following: battery temperature, battery remaining power (State Of Charge, SOC) and pulse charging time. Correspondingly, the target state parameter measured value here may include at least one of the following: battery temperature measured value, battery SOC measured value and preset pulse charging time measured value.

[0069] S102, determining a current maximum relaxation value of the anode potential of a battery in the vehicle according to an actual measured value of the target state parameter and a preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential.

[0070] In the embodiments of the present application, from a thermodynamic point of view, lithium deposition will occur when the anode potential is lower than 0 millivolts (mV), causing safety issues. However, due to the characteristics of the recharge current: short time (for example, 6 or 10 seconds) and large recharge current value, the anode is highly polarized, which causes the actual lithium deposition potential to shift, specifically, the anode potential is lower than 0mV without lithium deposition. Especially at low temperatures, this polarization will be further aggravated. Therefore, the energy recovery efficiency can be improved by relaxing the anode potential.

[0071] For example, for electric vehicles using lithium-ion batteries as power batteries, the critical value of the anode potential for lithium deposition is usually set to 0mV (i.e., the critical initial value of lithium deposition is 0mV). However, at low temperatures, due to the overpotential caused by the polarization of the battery, the graphite surface does not reach a fully lithium-embedded state, resulting in the anode potential being below 0mV without lithium deposition. Therefore, in the embodiment of the present application, the anode potential can be appropriately relaxed until lithium deposition occurs. Here, the maximum relaxation value of the anode potential represents the anode potential corresponding to the battery when it is in a critical state of lithium deposition. The "maximum" here represents the maximum anode potential boundary that the battery can reach when lithium deposition does not occur. If the anode potential continues to be relaxed, lithium deposition will occur; therefore, the maximum relaxation value of the anode potential can also be referred to as the lithium deposition limit value of the anode potential (or "critical lithium deposition value"). For example, it is assumed that the critical initial value of lithium deposition is 0mV. However, after research, it is found that lithium deposition will only occur when the anode potential of the battery is relaxed to below -200mV. That is to say, lithium deposition will not occur when the anode potential is 0mV, and lithium deposition will only occur when the anode potential is below -200mV. At this time, the lithium deposition limit value is -200mV, that is, the maximum relaxation value of the anode potential is -200mV.

[0072] That is to say, in the embodiment of the present application, the maximum relaxation value of the anode potential of the battery represents the anode potential corresponding to the battery in the critical state of lithium deposition. When the anode potential is relaxed, the anode potential of the battery can be relaxed to the maximum relaxation value of the anode potential. For example, if the maximum relaxation value of the anode potential is -200mV, the anode potential of the battery can be relaxed to a maximum of -200mV. If it is further relaxed, lithium deposition will occur in the battery.

[0073] In an embodiment of the present application, a preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential can be pre-established based on multiple groups of test data of the target state parameter. The preset mapping relationship can be embodied in the form of a mapping table. In this way, after obtaining the actual measured value of the target state parameter of the vehicle, the maximum relaxation value of the anode potential corresponding to the target state parameter can be determined in combination with the preset mapping relationship, so as to determine the current maximum relaxation value of the anode potential of the battery in the current vehicle.

[0074] S103, determining the recharge power of the battery according to the current maximum relaxation value of the anode potential, and charging the battery according to the recharge power.

[0075] In the embodiment of the present application, after obtaining the maximum relaxation value of the current anode potential of the battery, the recharge power of the battery can be determined according to the maximum relaxation value of the current anode potential, and then the battery is charged according to the recharge power. In this way, by relaxing the anode potential, the charging current can be increased, thereby improving the energy recovery efficiency.

[0076] In some embodiments, the recharge power of the battery is determined according to the maximum relaxation value of the current anode potential, such as Figure 2 As shown, the recharge control method may include steps S201-S202, which are specifically as follows:

[0077] S201, determining a recharge current value corresponding to a current maximum relaxation value of the anode potential based on a first mapping relationship between the charging current and the maximum relaxation value of the anode potential.

[0078] In an embodiment of the present application, establishing a first mapping relationship may include: charging the battery with different charging currents at a preset temperature and a preset SOC of the battery, and determining the maximum relaxation value of the anode potential after a preset pulse charging time; and establishing a first mapping relationship between the charging current and the maximum relaxation value of the anode potential based on different charging currents and their corresponding maximum relaxation values ​​of the anode potential.

[0079] In the embodiment of the present application, the mapping relationship between the charging rate and the maximum relaxation value of the anode potential can be obtained first, and then the charging rate is replaced with the charging current according to the mapping relationship between the charging current and the charging rate, and then the first mapping relationship between the charging current and the maximum relaxation value of the anode potential is obtained. Here, the first mapping relationship can be called the anode potential calibration curve.

[0080] For example, Figure 3 A schematic diagram of the mapping relationship between the charging rate and the anode potential provided in an embodiment of the present application. Figure 3In the figure, the preset SOC is 50% SOC, the preset pulse charging time is 30 seconds, a1 represents the mapping relationship between the charging rate and the anode potential at 25 degrees Celsius (℃), a2 represents the mapping relationship between the charging rate and the anode potential at -10℃, and a3 represents the mapping relationship between the charging rate and the anode potential at -20℃. Figure 3 The inflection points of the curves a2 and a3 can be considered as the inflection points of lithium deposition, that is, the critical lithium deposition value. It can be seen that lithium deposition will not occur until the anode potential is relaxed to below -200mV at low temperatures, and there is a large room for improvement in energy recharge efficiency.

[0081] It should be noted that the charging current and the charging rate have a corresponding relationship. In the embodiment of the present application, the charging rate and the charging current can be replaced with each other, and this is not specifically limited.

[0082] S202: Determine the recharging power of the battery according to the recharging current value.

[0083] In an embodiment of the present application, the recharge current value of the battery can be obtained based on the current maximum relaxation value of the anode potential and the first mapping relationship, and then the recharge power of the battery can be obtained based on the recharge current value. In this way, when the battery is recharged according to the recharge power, the energy recovery efficiency of the vehicle can be improved, thereby increasing the vehicle's cruising range.

[0084] In an embodiment of the present application, if the maximum relaxation value of the anode potential is smaller, the recharge current value is smaller, and the corresponding recharge power is smaller; otherwise, if the maximum relaxation value of the anode potential is larger, the recharge current value is larger, and the corresponding recharge power is larger, thereby providing more recharge energy for the battery.

[0085] It should also be noted that in the embodiment of the present application, the upper limit voltage can be relaxed by relaxing the anode potential, especially at high SOC. In this way, by appropriately relaxing the upper limit voltage and anode potential, the recharge current can be increased, the recharge power can be improved, and the vehicle's cruising range can be improved.

[0086] The embodiment of the present application provides a recharge control method, when the vehicle enters the braking mode, the maximum relaxation value of the current anode potential of the battery in the vehicle is determined according to the actual measured value of the target state parameter and the preset mapping relationship between the target state parameter and the maximum relaxation value of the anode, and then the recharge power of the battery is determined according to the current maximum relaxation value of the anode potential, and the battery is charged according to the recharge power. In this way, by relaxing the anode potential of the battery without changing the battery cell and without increasing additional costs, the recharge current can be increased, so that the recharge power is increased, thereby improving the energy recovery efficiency of the vehicle, and also improving the vehicle's cruising range.

[0087] In another embodiment of the present application, for establishing a preset mapping relationship, such as Figure 4 As shown, the recharge control method may include steps S401 to S404, which are specifically as follows:

[0088] S401, based on multiple groups of test data of target state parameters, obtaining initial anode potential values ​​corresponding to each of the multiple groups of test data of the battery.

[0089] In the embodiment of the present application, different temperatures, SOCs and pulse charging times can be randomly combined to obtain multiple groups of test data. For example, a group of test data of the battery is obtained at -10°C, 50% SOC and 30 seconds pulse charging time, a group of test data of the battery is obtained at -20°C, 50% SOC and 30 seconds pulse charging time, or a group of test data of the battery is obtained at a preset temperature, preset SOC and preset pulse charging time. The preset temperature, preset SOC and preset pulse charging time can be set according to actual conditions, and there is no limitation on this.

[0090] In an embodiment of the present application, the battery obtains multiple sets of test data at different temperatures, SOCs, and pulse charging times, and then determines the initial anode potential values ​​corresponding to the battery under the multiple sets of test data. Here, the initial anode potentials of different SOCs can be measured based on the stacked three electrodes. Specifically, the initial anode potential value can be obtained by first obtaining the measured SOC of the battery, and then obtaining the initial anode potential value corresponding to the measured SOC based on the mapping relationship between the initial anode potential and the SOC.

[0091] S402, determining charging currents corresponding to each of the plurality of test data sets according to a charging window corresponding to a preset pulse charging time and an initial anode potential value.

[0092] In the embodiment of the present application, the charging current corresponding to each of the multiple sets of test data can be determined according to the charging window corresponding to the preset pulse charging time and the initial anode potential value. Here, one pulse charging time can correspond to one charging window, and the mapping relationship between the anode potential and the charging current under the pulse charging time can be determined through the charging window corresponding to the pulse charging time. That is to say, in the embodiment of the present application, different preset pulse charging times can correspond to different preset mapping relationships.

[0093] In some embodiments, the charging current corresponding to each of the plurality of test data is determined according to the charging window corresponding to the preset pulse charging time and the initial anode potential value, such as Figure 5 As shown, the recharge control method may include steps S501 to S503, which are specifically as follows:

[0094] S501, at a preset temperature of the battery, determining a second mapping relationship between the charging current and the first polarization after a preset pulse charging time according to a first mapping relationship between the charging current and the maximum relaxation value of the anode potential.

[0095] In the embodiment of the present application, for the second mapping relationship between the charging current and the first polarization, a fourth mapping relationship between the anode potential corresponding to different charging currents and the logarithmic function of the preset pulse charging time can be obtained according to the first mapping relationship between the charging current and the maximum relaxation value of the anode potential, and then the first polarization value corresponding to the different charging currents can be obtained according to the intercept of the fourth mapping relationship corresponding to the different charging currents. In this way, the second mapping relationship between the charging current and the first polarization can be obtained by fitting different charging currents with the first polarization values ​​corresponding to different charging currents.

[0096] In some specific embodiments, the second mapping relationship is determined, such as Figure 6 As shown, the recharge control method may include steps S601-S602, which are specifically as follows:

[0097] S601, determining first polarization values ​​corresponding to different charging currents after a preset pulse charging time according to a first mapping relationship between the charging current and the maximum relaxation value of the anode potential.

[0098] In a specific embodiment, determining the first polarization value may include: establishing a fourth mapping relationship between the anode potential and the logarithmic function of the preset pulse charging time under different charging currents based on a first mapping relationship between the charging current and the maximum relaxation value of the anode potential; and determining the intercept of the fourth mapping relationship as the first polarization value corresponding to the different charging currents.

[0099] In the embodiment of the present application, Figure 3 As the basis, Figure 7 A schematic diagram of the mapping relationship between the anode potential under different charging currents and the logarithmic function of the preset pulse charging time provided in an embodiment of the present application. Figure 3 Based on the logarithmic function of the preset pulse charging time as the horizontal axis, the anode potential as the vertical axis, Figure 7 b1, b2, b3, b4 and b5 respectively represent the anode potential after the preset pulse charging time of 3 to 5 seconds under different charging currents. The fourth mapping relationship is obtained by linear fitting the anode potential after the preset pulse charging time of 3 to 5 seconds. Among them, the fourth mapping relationship corresponding to b1 is y1=-0.0081x-0.01, and the fitting degree R 2=0.9938; the fourth mapping relationship corresponding to b2 is y2=-0.0126x-0.0651, and the fitting degree is R²=0.9986; the fourth mapping relationship corresponding to b3 is y3=-0.0193x-0.1431, and the fitting degree is R²=0.9995; the fourth mapping relationship corresponding to b4 is y=-0.0222x-0.1692, and the fitting degree is R²=0.999; the fourth mapping relationship corresponding to b5 is y5=-0.0234x-0.1944, and the fitting degree is R²=0.9996. Among them, the ordinate y is the anode potential; the abscissa x is ln(t), and t is the pulse charging time.

[0100] In the embodiment of the present application, after obtaining the fourth mapping relationship between the anode potential and the logarithmic function of the preset pulse charging time under different charging currents, the intercept of the fourth mapping relationship is used as the first polarization value corresponding to the different charging currents.

[0101] S602, performing fitting according to first polarization values ​​corresponding to different charging currents, and establishing a second mapping relationship between the charging current and the first polarization.

[0102] In the embodiment of the present application, a linear fit can be performed according to the first polarization values ​​corresponding to different charging currents to obtain a second mapping relationship. For example, with the first polarization as the ordinate and the charging current as the abscissa, a linear fit is performed on the first polarization values ​​under different charging currents to obtain a second mapping relationship between the charging current and the first polarization.

[0103] In an embodiment of the present application, the mapping relationship between the charging rate and the first polarization can be obtained first, and then the charging rate is replaced with the charging current according to the mapping relationship between the charging current and the charging rate, and then the second mapping relationship between the charging current and the first polarization is obtained.

[0104] For example, Figure 8 A schematic diagram of a mapping relationship between a charging rate and a first polarization provided in an embodiment of the present application. Figure 8 As shown, the horizontal axis is the charging rate, the vertical axis is the first polarization, and s represents the linear fitting of the first polarization values ​​corresponding to four different charging rates to obtain the second mapping relationship between the charging rate and the first polarization. Figure 8 The second mapping relationship corresponding to s shown is f=0.1198z+0.0081, and the fitting degree R²=0.9952; wherein, the ordinate f is the first polarization, and the abscissa z is the charging rate.

[0105] It can be understood that in the embodiment of the present application, the first polarization value corresponding to different charging currents after the preset pulse charging time is determined according to the first mapping relationship, and fitting according to the first polarization values ​​corresponding to the different charging currents can accurately establish the second mapping relationship between the charging current and the first polarization, thereby improving the accuracy of the preset mapping relationship.

[0106] S502: Determine a third mapping relationship between the charging current and the second polarization at a preset temperature of the battery.

[0107] In the embodiments of the present application, the first polarization is different from the second polarization. For example, the first polarization may be concentration polarization, and the second polarization may be other polarizations except concentration polarization. Among them, concentration polarization is the suppression effect of strong concentrated ions on weak concentrated ions, which affects the potential balance of the battery; the second polarization is mainly electrochemical polarization, which means that when current passes through, the degree of electrode charge is different from that in the reversible situation due to the slowness of the electrochemical reaction, resulting in the phenomenon of electrode potential deviation. The characteristic of electrochemical polarization is that excess electrons accumulate on the electrode surface at the current outflow end, that is, the electrode potential tends to be negative, and the opposite is true at the current inflow end.

[0108] In an embodiment of the present application, for the third mapping relationship between the charging current and the second polarization, the polarization potential value of the battery corresponding to different charging currents can be determined according to the first mapping relationship between the charging current and the maximum relaxation value of the anode potential, as well as the first polarization value of the battery corresponding to different charging currents. Then, the difference between the polarization potential values ​​corresponding to different currents and the first polarization values ​​corresponding to different charging currents is calculated to obtain the second polarization values ​​corresponding to different charging currents. The different charging currents are fitted with the second polarization values ​​corresponding to different charging currents, so as to obtain the third mapping relationship between the charging current and the second polarization.

[0109] In a specific embodiment, the third mapping relationship is determined as follows: Fig. 9 As shown, the recharge control method may include steps S901 to S903, which are specifically as follows:

[0110] S901, at a preset temperature of the battery, according to a first mapping relationship between the charging current and the maximum relaxation value of the anode potential, determining polarization potential values ​​corresponding to different charging currents.

[0111] In an embodiment of the present application, under a preset charging current and a preset SOC, the polarization potential value is obtained by subtracting the initial anode potential value from the end value of the anode potential after the preset pulse charging time. The difference between the end value of the anode potential and the initial anode potential value corresponding to different charging currents is calculated respectively to obtain the polarization potential value corresponding to the battery under different charging currents.

[0112] S902, determining second polarization values ​​corresponding to different charging currents at a preset temperature of the battery according to polarization potential values ​​corresponding to different charging currents and first polarization values ​​corresponding to different charging currents.

[0113] In the embodiment of the present application, the polarization potential value represents the electrode polarization of the battery. The polarization potential value may be the sum of the first polarization value and the second polarization value. Thus, at a preset temperature and a preset charging current of the battery, the second polarization value is equal to the difference between the polarization potential value and the first polarization value.

[0114] S903, performing fitting according to the second polarization values ​​corresponding to different charging currents to determine a third mapping relationship between the charging current and the second polarization.

[0115] In the embodiment of the present application, a linear fit can be performed according to the second polarization values ​​corresponding to different charging currents to obtain a third mapping relationship. Exemplarily, a linear fit is performed on the second polarization values ​​under different charging currents with the second polarization as the ordinate and the charging current as the abscissa, thereby obtaining a third mapping relationship between the charging current and the second polarization.

[0116] That is to say, in an embodiment of the present application, the polarization potentials corresponding to different charging currents are determined according to the first mapping relationship at the preset temperature of the battery, and the second polarization values ​​corresponding to different charging currents at the preset temperature of the battery are determined according to the polarization potential values ​​corresponding to different charging currents and the first polarization values. Then, fitting is performed according to the second polarization values ​​corresponding to different charging currents, so that the third mapping relationship between the charging current and the second polarization can be accurately established, thereby improving the accuracy of the preset mapping relationship.

[0117] S503, when the initial anode potential value, the second mapping relationship and the third mapping relationship satisfy a preset condition, determining the charging current corresponding to each of the plurality of groups of test data.

[0118] In an embodiment of the present application, the preset equation may be: the difference between zero and the second mapping relationship is equal to the difference between the initial anode potential value and the third mapping relationship, or in other words, the third mapping relationship is equal to the sum of the initial anode potential value and the second mapping relationship.

[0119] Thus, in the embodiment of the present application, by solving the preset equation, the calculation result is determined as the charging current corresponding to each of the multiple groups of test data, so that a preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential can be established. According to the preset mapping relationship, the current maximum relaxation value of the anode of the battery can be accurately determined, thereby improving the energy recovery efficiency of the vehicle.

[0120] S403, determining the maximum relaxation values ​​of the anode potential corresponding to each of the plurality of test data groups according to a first mapping relationship between the charging current and the maximum relaxation value of the anode potential.

[0121] In an embodiment of the present application, after obtaining the charging current corresponding to each of the multiple sets of test data, the maximum relaxation value of the anode potential corresponding to each of the multiple sets of test data can be obtained based on the first mapping relationship between the charging current and the maximum relaxation value of the anode potential.

[0122] S404, establishing a preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential according to the multiple groups of test data of the target state parameter and the maximum relaxation values ​​of the anode potential corresponding to the multiple groups of test data.

[0123] In this way, in an embodiment of the present application, a Mapping table can be drawn based on multiple sets of test data of the target state parameters and the corresponding maximum relaxation values ​​of the anode potential under the multiple sets of test data, so as to obtain a preset mapping relationship between the target state parameters and the maximum relaxation values ​​of the anode potential.

[0124] That is to say, in the embodiment of the present application, when the vehicle enters the braking mode, after obtaining the actual measured value of the target state parameter of the vehicle in the current state, the maximum relaxation value of the current anode potential of the battery can be determined in combination with the Mapping table.

[0125] Furthermore, in the embodiment of the present application, the calculation logic of the recharge power mapping table is: laminated three-electrode recharge power test, hard shell battery test current and mechanical current limiting. Three groups of test data can be obtained under these three calculation logics; and the lowest value is selected from these three groups of test data, and then the final mapping table is output according to the calculation logic corresponding to the lowest value.

[0126] Among them, the stacked three-electrode test method mainly tests the maximum current value when the anode potential is below 0mV; the hard shell battery current test method tests the maximum current value when the battery voltage reaches the upper limit; the mechanical current limiting is the maximum current value limited by the materials used in the mechanical parts of the battery; that is to say, according to these three sets of test data, the lowest value is selected from them, that is, the minimum value of the maximum current values ​​in the three sets of test data is taken, and the calculation logic corresponding to the minimum value is output as the final Mapping table.

[0127] The embodiment of the present application provides a recharge control method, which first determines the initial anode potential value corresponding to each of the multiple test data before charging, then determines the charging current corresponding to each of the multiple test data after the preset pulse charging time, and determines the maximum relaxation value of the anode potential corresponding to each of the multiple test data according to the first mapping relationship between the charging current and the maximum relaxation value of the anode potential, and finally establishes a preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential. In this way, a preset mapping relationship is established through multiple test data under the target state parameter, and then the maximum relaxation value of the anode of the battery in the current state can be accurately determined according to the preset mapping relationship, thereby improving the energy recovery efficiency of the vehicle.

[0128] In another embodiment of the present application, based on the recharge control method of the above embodiment, Fig.10 A flow chart of a recharge control method provided in an embodiment of the present application Figure 7 .like Fig.10 As shown, the recharge control method may include steps S1001 to S1003, which are specifically as follows:

[0129] S1001: Obtain the initial anode potential of the battery at different temperatures, remaining power, and charging rates for a pulse charging time of 30 seconds and the corresponding voltage and charging current values ​​of the battery.

[0130] In an embodiment of the present application, multiple sets of test data for establishing a mapping relationship between the charging rate and the anode potential can be obtained according to step S1001. It should be noted that, in general, the anode potential cannot be directly obtained, and the anode potential needs to be determined by the voltage of the battery. Exemplarily, when determining the initial anode potential, the remaining power of the battery can be determined according to the voltage of the battery, and then the initial anode potential can be determined according to the mapping relationship between the initial anode potential and the remaining power.

[0131] S1002: Determine the maximum relaxation value of the anode potential and the corresponding voltage and charging current values ​​of the battery according to the charging window, interface lithium deposition, and pulse cycle verification.

[0132] In the embodiment of the present application, the charging window can be an anode calibration curve (i.e., a first mapping relationship); the interface lithium deposition is a phenomenon in which lithium deposition occurs in the battery; and the pulse cycle verification is to experimentally verify the maximum relaxation value of the anode potential for different pulse charging times. Step S1002 is to obtain multiple sets of test data required to establish a preset mapping relationship.

[0133] S1003: Establishing a preset mapping relationship according to the above-mentioned multiple groups of test data.

[0134] It should be noted that in the related art, the upper limit voltage and anode potential of the battery in the vehicle are cut off when they are 0mV, which limits the charging current value and causes the problem of low recharge power; and the recharge control method provided by the embodiment of the present application determines the maximum relaxation value of the anode potential, so that the upper limit voltage and anode potential of the battery can be appropriately relaxed, which can increase the charging current value, improve the recharge power, and thus improve the vehicle's cruising range. In this way, a preset mapping relationship is established through multiple sets of test data, and then the maximum relaxation value of the anode of the battery in the current state can be accurately determined according to the preset mapping relationship, thereby improving the energy recovery efficiency of the vehicle.

[0135] In a specific embodiment, in combination Fig.10 , the recharge control method may include:

[0136] When electric vehicles are in braking mode or downhill, the kinetic energy of braking will be converted into electrical energy for recycling, which is beneficial to increasing the range of electric vehicles.

[0137] At present, the calculation logic of the recharge power mapping table is: laminated three-electrode recharge power test, hard shell battery test current and mechanical parts current limiting. Three sets of test data can be obtained under these three calculation logics; the lowest value is selected from these three sets of test data, and then the final mapping table is output according to the calculation logic corresponding to the lowest value.

[0138] Among them, the stacked three-electrode test method mainly tests the maximum current value when the anode potential is 0mV, and the hard shell test current test method mainly tests the maximum current value when the full battery voltage reaches the upper limit. Generally speaking, the larger the recharge current value of the battery, the more energy is recovered, and the more the vehicle's cruising range is improved; therefore, under the premise of ensuring battery safety, increasing the recharge current value is conducive to increasing cruising range and reducing battery costs.

[0139] In the embodiment of the present application, the relaxation of the anode potential for stacking power recharge is described in detail:

[0140] It should be noted that, in the embodiment of the present application, the maximum relaxation value of the anode potential may be related to the temperature and SOC of the battery.

[0141] In the embodiment of the present application, the electrochemical polarization can be calculated according to the Tafel equation, and the calculation formula is as follows:

[0142] (1)

[0143] in, is the electrochemical polarization, is the current density, and Is a constant value.

[0144] In the embodiments of the present application, Fig.11 A schematic diagram of the mapping relationship between the initial anode potential and the remaining power provided in an embodiment of the present application. Fig.11 In the figure, the horizontal axis is the remaining power, and the vertical axis is the anode potential. Among them, c1 represents the mapping relationship between the anode potential and SOC when the battery is not charged, that is, when the battery is in a static state; c2 represents the mapping relationship between the anode potential and SOC when the battery is charged, that is, when the battery is in a charging state. When the battery is in a charging state and the SOC reaches about 60%, lithium deposition occurs in the battery, and the corresponding anode potential is about -0.75V (i.e., the lithium deposition boundary). In addition, is the initial anode potential when the battery is in a static state and the SOC is about 30%, The end anode potential corresponding to the battery being in a static state and SOC being about 60% is The battery is in a charging state and the SOC is about 60% corresponding to the end anode potential. and The difference is , that is, the change in anode potential between the end anode potential corresponding to the battery being in a static state and the SOC being about 60% and the end anode potential corresponding to the battery being in a charging state and the SOC being about 60%. In other words, the embodiment of the present application can relax the anode potential to below 0V, so that there is a large room for improvement in the energy recharging efficiency of the vehicle.

[0145] In a specific embodiment, the mapping relationship between the anode potential and the SOC can be fitted by a polynomial, and the expression of the mapping relationship is as follows:

[0146] (2)

[0147] in, is the initial anode potential value, is the SOC value, , and Is a constant value.

[0148] In the embodiment of the present application, the establishment of the preset mapping relationship may include the following steps:

[0149] Step 1, using the anode potential calibration curve, calculate the polarization potential value k according to the temperature;

[0150] Step 2, determine the initial anode potential value u according to the SOC value (measure the anode potential of different SOCs based on the stacked three electrodes).

[0151] Step 3, Figure 3 On the basis of Figure 7As shown, the horizontal axis is changed to the logarithmic function of the preset pulse charging time (i.e., lnt), the anode potential is the vertical axis, and the anode potential point after 3 to 5 seconds is linearly fitted to obtain the fourth mapping relationship, and the intercept of the fourth mapping relationship is the concentration polarization value v under the current current.

[0152] Step 4, such as Figure 8 As shown, a linear fitting is performed on v under different currents to obtain a second mapping relationship, which is recorded as w.

[0153] Step 5, other polarizations g=kv dominated by electrochemical polarization at each temperature, and then use g as the ordinate and the charge rate as the abscissa to perform linear fitting to obtain the third mapping relationship, recorded as d.

[0154] Step 6, when 0-w=ud, or d=u+w, the current value calculated at this time is the recharge current value after relaxing the anode potential.

[0155] Step 7, calculating the maximum relaxation value of the anode potential when the lithium deposition potential is k according to the anode potential calibration curve.

[0156] In the present application, the input target state parameters in the calculation logic can be preset, and the preset mapping relationship can be adjusted during use according to the actual measured values ​​of the target state parameters collected in real time.

[0157] In the embodiments of the present application, Fig.12 A schematic diagram of a power benefit provided in an embodiment of the present application Figure 1 , Fig.13 A schematic diagram of a power benefit provided in an embodiment of the present application Figure 2 The power gain is the difference between the recharge power after relaxing the anode potential and the recharge power before relaxing the anode potential, divided by the recharge power before relaxing the anode potential. Fig.12 This is the power benefit diagram of lithium iron phosphate (LiFePO4, LFP) battery at -10℃ and 90% SOC. Fig.13 This is the power benefit diagram of Nickel Cobalt Manganese (NCM) battery at -10°C and 50% SOC. Fig.12 and Fig.13 The horizontal axis is the charging rate, and the vertical axis is the power gain. Fig.12 The bold dashed line p in the figure is the lithium deposition limit value, which can also be called the critical lithium deposition value. When the charging rate exceeds the charging rate corresponding to the bold dashed line p, the battery will undergo lithium deposition. Although the power efficiency is high, for battery safety considerations, the charging rate cannot be greater than the charging rate corresponding to the bold dashed line p. Fig.12 As an example, when the charging rate is 1.2C, the power gain is 150%. Fig.12 and Fig.13 It can be seen that the recharge power after relaxing the anode potential is higher than the recharge power without relaxing the anode potential, and the greater the relaxation of the anode potential, the greater the recharge power.

[0158] The embodiment of the present application provides a recharge control method, which can be specifically a recharge strategy for relaxing the anode potential. The above embodiment has been used to elaborate on the specific implementation of the aforementioned embodiment, from which it can be seen that the recharge control method can improve the energy recovery efficiency without changing the battery cell design and without adding additional costs. Specifically, by relaxing the anode potential of the battery, the energy recovery efficiency is improved, thereby improving the cruising range and product competitiveness. It can be seen that the recharge power improvement of the recharge control method is a low-cost, high-yield method; at the same time, by relaxing the anode potential, the upper limit voltage is relaxed, especially at high SOC, which can increase the energy density and thus increase the cruising range. In addition, the recharge control method can also reduce the cost of the battery and the vehicle's energy consumption per 100 kilometers.

[0159] Based on the same inventive concept as the above embodiments, Fig.14 A schematic diagram of the composition structure of a recharge control device provided in an embodiment of the present application. Fig.14 As shown, the recharging control device 140 may include an acquisition unit 1401, a determination unit 1402 and a charging unit 1403, wherein:

[0160] The acquisition unit 1401 is configured to acquire a measured value of a target state parameter of the vehicle in a current state when the vehicle enters a braking mode;

[0161] The determining unit 1402 is configured to determine the current maximum relaxation value of the anode potential of the battery in the vehicle according to the actual measured value of the target state parameter and the preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential; and determine the recharge current value corresponding to the current maximum relaxation value of the anode potential based on the first mapping relationship between the charging current and the maximum relaxation value of the anode potential;

[0162] The charging unit 1403 is configured to determine the recharging power of the battery according to the recharging current value, and charge the battery according to the recharging power.

[0163] In some embodiments, the target state parameter includes at least one of the following: battery temperature, battery remaining power, and pulse charging time.

[0164] In some embodiments, Fig.14As shown, the recharge control device 140 also includes an establishing unit 1404; the acquiring unit 1401 is further configured to acquire the initial anode potential values ​​corresponding to the battery under the multiple sets of test data based on the multiple sets of test data of the target state parameter; the determining unit 1402 is further configured to determine the charging current corresponding to each of the multiple sets of test data according to the charging window corresponding to the preset pulse charging time and the initial anode potential value; and determine the maximum relaxation value of the anode potential corresponding to each of the multiple sets of test data according to the first mapping relationship between the charging current and the maximum relaxation value of the anode potential; the establishing unit 1404 is configured to establish a preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential according to the multiple sets of test data and the maximum relaxation value of the anode potential corresponding to each of the multiple sets of test data.

[0165] In some embodiments, the determination unit 1402 is further configured to determine, at a preset temperature of the battery, a second mapping relationship between the charging current and the first polarization after a preset pulse charging time based on a first mapping relationship between the charging current and the maximum relaxation value of the anode potential; determine a third mapping relationship between the charging current and the second polarization at a preset temperature of the battery; and determine the charging current corresponding to each of the multiple sets of test data when preset conditions are met between the initial anode potential value, the second mapping relationship, and the third mapping relationship.

[0166] In some embodiments, the determination unit 1402 is further configured to determine the first polarization value corresponding to different charging currents after a preset pulse charging time based on a first mapping relationship between the charging current and the maximum relaxation value of the anode potential; the establishment unit 1404 is further configured to perform fitting based on the first polarization values ​​corresponding to different charging currents to establish a second mapping relationship between the charging current and the first polarization.

[0167] In some embodiments, the establishing unit 1404 is further configured to establish a fourth mapping relationship between the anode potential and the logarithmic function of the preset pulse charging time under different charging currents based on the first mapping relationship between the charging current and the maximum relaxation value of the anode potential; the determining unit 1402 is further configured to determine the intercept of the fourth mapping relationship as the first polarization value corresponding to the different charging currents.

[0168] In some embodiments, the determination unit 1402 is further configured to determine, at a preset temperature of the battery, polarization potential values ​​corresponding to different charging currents based on a first mapping relationship between the charging current and the maximum relaxation value of the anode potential; determine second polarization values ​​corresponding to different charging currents at a preset temperature of the battery based on the polarization potential values ​​corresponding to different charging currents and the first polarization values ​​corresponding to different charging currents; and determine a third mapping relationship between the charging current and the second polarization by fitting the second polarization values ​​corresponding to different charging currents.

[0169] In some embodiments, the determination unit 1402 is further configured to solve the preset equation when the preset equation is satisfied between the initial anode potential value, the second mapping relationship and the third mapping relationship, and determine the calculation result as the charging current corresponding to each of the multiple groups of test data.

[0170] It is understandable that in the embodiments of the present application, a "unit" may be a part of a circuit, a part of a processor, a part of a program or software, etc., and of course, it may be a module, or it may be non-modular. Moreover, the various components in the embodiments of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of a software functional module.

[0171] If the integrated unit is implemented in the form of a software function module and is not sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or the whole or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the method described in the embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc. Various media that can store program codes.

[0172] An embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by at least one processor, the steps of the recharge control method described in any one of the aforementioned embodiments are implemented.

[0173] An embodiment of the present application also provides a computer program product, including a computer program or instructions, which, when executed by a processor, implements the steps of the recharge control method as described in any of the aforementioned embodiments.

[0174] In yet another embodiment of the present application, Fig.15 This is a schematic diagram of a specific hardware structure of an electronic device provided in an embodiment of the present application. Fig.15As shown, the electronic device 150 may include: a communication interface 1501, a memory 1502 and a processor 1503; each component is coupled together via a bus system 1504. It is understood that the bus system 1504 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 1504 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, Fig.15 Various buses are labeled as bus system 1504. Among them, the communication interface 1501 is used for receiving and sending signals in the process of sending and receiving information between other external network elements;

[0175] Memory 1502, used to store computer programs that can be run on processor 1503;

[0176] The processor 1503 is configured to execute, when running the computer program:

[0177] When the vehicle enters the braking mode, the actual measured values ​​of the target state parameters of the vehicle in the current state are obtained; the current maximum relaxation value of the anode potential of the battery in the vehicle is determined based on the actual measured values ​​of the target state parameters and the preset mapping relationship between the target state parameters and the maximum relaxation value of the anode potential; the recharge power of the battery is determined based on the current maximum relaxation value of the anode potential, and the battery is charged according to the recharge power.

[0178] It can be understood that the memory 1502 in the embodiment of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus random access memory (DRRAM). The memory 1002 of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0179] The processor 1503 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware or software instructions in the processor 1503. The above-mentioned processor 1503 may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor. The steps of the recharge control method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 1502, and the processor 1503 reads the information in the memory 1502 and completes the steps of the above-mentioned recharging control method in combination with its hardware.

[0180] It is understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit may be implemented in one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in the present application, or a combination thereof.

[0181] For software implementation, the techniques described herein can be implemented by modules (e.g., procedures, functions, etc.) that perform the functions described herein. The software code can be stored in a memory and executed by a processor. The memory can be implemented in the processor or outside the processor.

[0182] Optionally, as another embodiment, the processor 1503 is further configured to execute the recharge control method described in any one of the aforementioned embodiments when running the computer program.

[0183] In some embodiments, the embodiments of the present application further provide an electronic device 150, which may at least include the recharging control device 140 described in any one of the aforementioned embodiments.

[0184] In the embodiment of the present application, for the electronic device 150, the recharge current can be increased by relaxing the anode potential of the battery without changing the battery cells and increasing additional costs, thereby increasing the recharge power and further improving the energy recovery efficiency of the vehicle.

[0185] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, devices, equipment, or computer program products. Therefore, the present application may take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program codes.

[0186] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0187] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0188] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0189] It should be noted that, in this application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, product or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, product or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, product or device including the element.

[0190] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0191] The methods disclosed in several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0192] The features disclosed in several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0193] The features disclosed in several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0194] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A recharging control method, characterized in that: The recharging control method comprises: When the vehicle enters a braking mode, obtaining a measured value of a target state parameter of the vehicle in a current state; Determine the current maximum relaxation value of the anode potential of the battery in the vehicle according to the measured value of the target state parameter and the preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential, wherein the maximum relaxation value of the anode potential represents the anode potential corresponding to the battery being in a critical state of lithium deposition; Determining a recharge current value corresponding to the current maximum relaxation value of the anode potential based on a first mapping relationship between the charging current and the maximum relaxation value of the anode potential; Determining a recharge power of the battery according to the recharge current value, and charging the battery according to the recharge power; Wherein, the recharging control method further includes: Based on the multiple groups of test data of the target state parameter, obtaining initial anode potential values ​​corresponding to the battery under the multiple groups of test data; Determining the charging current corresponding to each of the plurality of groups of test data according to the charging window corresponding to the preset pulse charging time and the initial anode potential value; Determining the maximum relaxation values ​​of the anode potential corresponding to each of the plurality of test data sets according to a first mapping relationship between the charging current and the maximum relaxation value of the anode potential; According to the multiple groups of test data of the target state parameter and the corresponding maximum relaxation values ​​of the anode potential under the multiple groups of test data, a preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential is established.

2. The recharge control method according to claim 1, characterized in that: The target state parameter includes at least one of the following: the temperature of the battery, the remaining power of the battery, and the pulse charging time.

3. The recharge control method according to claim 1, characterized in that: The step of determining the charging currents corresponding to each of the plurality of test data according to the charging window corresponding to the preset pulse charging time and the initial anode potential value comprises: At a preset temperature of the battery, determining a second mapping relationship between the charging current and the first polarization after a preset pulse charging time according to a first mapping relationship between the charging current and the maximum relaxation value of the anode potential; determining a third mapping relationship between a charging current and a second polarization at a preset temperature of the battery; When a preset condition is satisfied between the initial anode potential value, the second mapping relationship, and the third mapping relationship, the charging current corresponding to each of the plurality of groups of test data is determined.

4. The recharge control method according to claim 3, characterized in that: The determining, according to the first mapping relationship between the charging current and the maximum relaxation value of the anode potential, a second mapping relationship between the charging current and the first polarization after the preset pulse charging time, comprises: Determining first polarization values ​​corresponding to different charging currents after a preset pulse charging time according to a first mapping relationship between the charging current and the maximum relaxation value of the anode potential; Fitting is performed according to the first polarization values ​​corresponding to the different charging currents to establish the second mapping relationship between the charging current and the first polarization.

5. The recharging control method according to claim 4, characterized in that: The determining, according to a first mapping relationship between the charging current and the maximum relaxation value of the anode potential, the first polarization value corresponding to different charging currents after a preset pulse charging time comprises: According to the first mapping relationship between the charging current and the maximum relaxation value of the anode potential, a fourth mapping relationship between the anode potential under different charging currents and the logarithmic function of the preset pulse charging time is established; The intercept of the fourth mapping relationship is determined as the first polarization value corresponding to the different charging currents.

6. The recharging control method according to claim 4, characterized in that: The determining of a third mapping relationship between the charging current and the second polarization at a preset temperature of the battery includes: At a preset temperature of the battery, determining polarization potential values ​​corresponding to different charging currents according to a first mapping relationship between charging current and anode potential maximum relaxation value; Determining, according to the polarization potential values ​​corresponding to the different charging currents and the first polarization values ​​corresponding to the different charging currents, the second polarization values ​​corresponding to the different charging currents at the preset temperature of the battery; Fitting is performed according to the second polarization values ​​corresponding to the different charging currents to determine the third mapping relationship between the charging current and the second polarization.

7. The recharge control method according to claim 3, characterized in that: When a preset condition is satisfied between the initial anode potential value, the second mapping relationship, and the third mapping relationship, determining the charging current corresponding to each of the plurality of groups of test data comprises: When a preset equation is satisfied between the initial anode potential value, the second mapping relationship and the third mapping relationship, the preset equation is solved and the calculation result is determined as the charging current corresponding to each of the plurality of groups of test data.

8. A recharging control device, characterized in that: The recharging control device includes an acquisition unit, a determination unit and a charging unit, wherein: The acquisition unit is configured to acquire a measured value of a target state parameter of the vehicle in a current state when the vehicle enters a braking mode; The determination unit is configured to determine the current maximum relaxation value of the anode potential of the battery in the vehicle according to the actual measured value of the target state parameter and the preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential, wherein the maximum relaxation value of the anode potential represents the anode potential corresponding to the critical state of lithium deposition of the battery; and determine the recharge current value corresponding to the current maximum relaxation value of the anode potential based on the first mapping relationship between the charging current and the maximum relaxation value of the anode potential; The charging unit is configured to determine a recharge power of the battery according to the recharge current value, and charge the battery according to the recharge power; The recharging control device further includes an establishing unit, wherein: The acquisition unit is further configured to acquire, based on the multiple groups of test data of the target state parameter, the initial anode potential values ​​of the battery corresponding to the multiple groups of test data; The determination unit is further configured to determine the charging current corresponding to each of the multiple sets of test data according to the charging window corresponding to the preset pulse charging time and the initial anode potential value; and determine the maximum relaxation value of the anode potential corresponding to each of the multiple sets of test data according to a first mapping relationship between the charging current and the maximum relaxation value of the anode potential; The establishing unit is configured to establish a preset mapping relationship between the target state parameter and the maximum relaxation value of the anode potential according to multiple groups of test data of the target state parameter and the maximum relaxation values ​​of the anode potential corresponding to each of the multiple groups of test data.

9. An electronic device, characterized in that: The electronic device comprises a memory and a processor, wherein: The memory is used to store a computer program that can be run on the processor; The processor is configured to execute the recharging control method according to any one of claims 1 to 7 when running the computer program.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the recharging control method according to any one of claims 1 to 7 is implemented.

11. A computer program product comprising a computer program or instructions, characterized in that When the computer program or instruction is executed by a processor, the recharging control method according to any one of claims 1 to 7 is implemented.

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