Electric vehicle charging control method and device, electronic equipment and storage medium

Abstract

The invention relates to the technical field of charging, and provides an electric vehicle charging control method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining a first health value of a battery under the condition that the battery of a vehicle is in an initial health state, and obtaining a second health value of the battery under the condition that the battery is in a termination health state; acquiring a current health value of the battery; and dynamically regulating and controlling the charging cut-off voltage of the vehicle based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit and the second maximum allowable charging voltage upper limit. In the process, the charging cut-off voltage is dynamically regulated and controlled, the charging cut-off voltage of each time is accurately calculated along with the dynamic change of the current health value, it is guaranteed that the available capacity of the battery is fully played in the life cycle, battery charging is safer, using is more scientific, the accuracy rate is high, different values can be set according to different types of batteries, and compatibility is better.

Description

Technical Field

[0001] The present invention relates to the field of charging technology, and in particular to an electric vehicle charging control method, device, electronic equipment and storage medium. Background Art

[0002] The power battery charging cut-off voltage is a key parameter that affects the battery charging safety. Generally, the charging performance of the battery is relatively stable at the beginning of its life. As the battery is recycled, the electrolyte inside the battery will be consumed less, and the negative electrode lithium dendrites will gradually precipitate and accumulate. At this time, if you continue to charge according to the initial charging cut-off voltage, the lithium battery will be at risk of fire and short circuit.

[0003] The existing technical solution mainly sets a fixed charging cut-off voltage point, which results in a large waste of available battery capacity, significantly increases the error, and even causes errors. Summary of the invention

[0004] The present invention provides an electric vehicle charging control method, device, electronic device and storage medium, which are used to solve the defects of setting a fixed charging cut-off voltage point in the prior art, resulting in a large waste of battery available capacity, a significant increase in errors, and even causing errors.

[0005] The present invention provides an electric vehicle charging control method, comprising the following steps: When a battery of a vehicle is in an initial health state, obtaining a first health value of the battery, and when the battery is in a terminated health state, obtaining a second health value of the battery; Obtaining the current health value of the battery; The charging cut-off voltage of the vehicle is dynamically adjusted based on the first health value, the second health value, the current health value, a first maximum allowable charging voltage upper limit, and a second maximum allowable charging voltage upper limit.

[0006] According to an electric vehicle charging control method provided by the present invention, the first maximum allowable charging voltage upper limit is obtained when the battery of the vehicle is in an initial healthy state; The second highest allowable charging voltage upper limit is obtained when the battery of the vehicle is in a terminated health state.

[0007] According to an electric vehicle charging control method provided by the present invention, the charging cut-off voltage of the vehicle is dynamically adjusted based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit, including: The charging cut-off voltage of the vehicle is dynamically adjusted based on the following formula: VCurrent=VBol-((VBol-VEol) (SOHBol-SOHCurrent) / (SOHBol–SOHEol)) Among them, VCurrent represents the charging cut-off voltage, VBol represents the first maximum allowable charging voltage upper limit, VEol represents the second maximum allowable charging voltage upper limit, SOHBol represents the first health value, SOHEol represents the second health value, and SOHCurrent represents the current health value.

[0008] According to a charging control method for an electric vehicle provided by the present invention, the charging cut-off voltage of the vehicle is dynamically regulated based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit, and then further includes: The current charging cut-off voltage of the vehicle is used as the charging cut-off voltage of this charging to charge the battery of the vehicle.

[0009] According to an electric vehicle charging control method provided by the present invention, the step of obtaining the current health value of the battery includes: When the vehicle is in a running state, a current health value of the battery is obtained.

[0010] According to a charging control method for an electric vehicle provided by the present invention, when the vehicle is in a running state, obtaining the current health value of the battery also includes: When the vehicle is not in operation, a current health value of the battery corresponding to the last time the vehicle was in operation is obtained.

[0011] The present invention also provides an electric vehicle charging control device, comprising the following modules: a first acquiring unit, configured to acquire a first health value of the battery when the battery of the vehicle is in an initial health state, and to acquire a second health value of the battery when the battery is in a terminated health state; A second acquisition unit, used to acquire a current health value of the battery; A control unit is used to dynamically control the charging cut-off voltage of the vehicle based on the first health value, the second health value, the current health value, a first maximum allowable charging voltage upper limit, and a second maximum allowable charging voltage upper limit.

[0012] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, any one of the above-mentioned electric vehicle charging control methods is implemented.

[0013] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the electric vehicle charging control method described in any one of the above is implemented.

[0014] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the electric vehicle charging control method described above is implemented.

[0015] The electric vehicle charging control method, device, electronic device and storage medium provided by the present invention obtain the first health value of the battery when the battery of the vehicle is in the initial health state, and obtain the second health value of the battery when the battery is in the terminal health state, and then obtain the current health value of the battery. Finally, based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit, the charging cut-off voltage of the vehicle is dynamically adjusted. This process dynamically calculates the current charging cut-off voltage based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit, so as to accurately calculate each charging cut-off voltage with the dynamic change of the health value, ensure that the available capacity of the battery is fully utilized within the life cycle, the battery charging is safer, the use is more scientific, the accuracy is high, and different values ​​can be set according to different types of batteries, and the compatibility is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is one of the flow charts of the electric vehicle charging control method provided by the present invention.

[0018] Figure 2 This is the second flow chart of the electric vehicle charging control method provided by the present invention.

[0019] Figure 3 It is a schematic diagram of the health value curve provided by the present invention.

[0020] Figure 4 It is a schematic diagram of the health value and charging cut-off voltage provided by the present invention.

[0021] Figure 5 It is a structural schematic diagram of the electric vehicle charging control device provided by the present invention.

[0022] Figure 6 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The terms "first", "second", etc. in the present invention are used to distinguish similar objects, rather than to describe a specific order or precedence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type.

[0025] Figure 1 This is one of the flow charts of the electric vehicle charging control method provided by the present invention, such as Figure 1 As shown, the method includes step 110 , step 120 and step 130 .

[0026] Step 110, when the battery of the vehicle is in an initial health state, obtaining a first health value of the battery, and when the battery is in a terminal health state, obtaining a second health value of the battery.

[0027] Specifically, when the battery of the vehicle is in an initial health state, the BMS (Battery Management System) obtains a first health value of the battery, and when the battery is in a terminal health state, the BMS obtains a second health value of the battery.

[0028] Here, the first health value may be represented by SOHBol, and the second health value may be represented by SOHEol.

[0029] Here, BMS is used to monitor and manage the status of the battery to ensure its safe, efficient and balanced operation. The main purpose of BMS is to prevent overcharging and over-discharging of the battery, extend the battery life, and ensure safe operation of the battery.

[0030] Furthermore, BMS can monitor key battery parameters such as voltage, current, temperature, etc. in real time. These data are essential for evaluating the health of the battery and predicting its performance. Through real-time monitoring, BMS can detect abnormal conditions in time and take corresponding measures.

[0031] Based on the monitored data, BMS can estimate the current health value of the battery, which helps to understand the aging and usage of the battery and provide a basis for subsequent maintenance and replacement. At the same time, BMS can also estimate the remaining power and mileage of the battery.

[0032] In addition, BMS has a variety of safety protection functions, such as overcharge protection, over-discharge protection, over-temperature protection, etc. When the battery has an abnormal condition, BMS can quickly take measures to prevent further damage to the battery or cause a safety accident.

[0033] Among them, the initial health state of the vehicle battery refers to the health and performance status of the battery when it is manufactured and put into use for the first time, which is generally regarded as the optimal state of the battery.

[0034] The end of health state of a vehicle battery means that the battery can no longer safely and effectively provide the required power, that is, it has reached the end of its service life. This state is usually accompanied by significant performance degradation and may even cause safety issues.

[0035] For example, when the capacity of the power battery pack decays to 80%, its service life is generally considered to be over. This means that the battery pack can only provide 80% of its original capacity and cannot fully meet the power requirements of the vehicle; for another example, when the capacity of the power battery pack decays to 70%, its service life is generally considered to be over. This means that the battery pack can only provide 70% of its original capacity and cannot fully meet the power requirements of the vehicle. The embodiments of the present invention do not specifically limit this.

[0036] Step 120, obtaining the current health value of the battery.

[0037] Specifically, the BMS may obtain the current health value of the battery, where the current health value may be represented by SOHCurrent.

[0038] It should be noted that the current health value of the battery can be read in real time or at regular intervals. The embodiment of the present invention does not specifically limit this. Among them, real-time reading of the current health value SOHCurrent is crucial for optimizing battery management, extending battery life, ensuring system safety and improving energy efficiency.

[0039] Here, since the current health value of the battery is relatively accurate when the vehicle is in operation, the BMS obtains the current health value of the battery when the vehicle is in operation. When the vehicle is not in operation, the BMS can obtain the current health value of the battery corresponding to the last time the vehicle was in operation. Thus, the accuracy of the current health value of the battery obtained is guaranteed, thereby ensuring the accuracy and reliability of the subsequent charging cut-off voltage regulation based on the current health value.

[0040] Step 130: dynamically adjust the charging cut-off voltage of the vehicle based on the first health value, the second health value, the current health value, a first maximum allowable charging voltage upper limit, and a second maximum allowable charging voltage upper limit.

[0041] Specifically, after obtaining the first health value, the second health value and the current health value, the charging cut-off voltage of the vehicle can be dynamically adjusted based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit.

[0042] Among them, the upper limit of the maximum allowable charging voltage of the battery refers to the maximum safe voltage value that the battery can reach during the charging process. Exceeding this value may cause damage to the battery or cause safety problems.

[0043] It should be noted that the embodiment of the present invention is a linear control method for the charging cut-off voltage of a power battery based on SOH (State of Health). The current charging cut-off voltage can be dynamically calculated according to the SOH value of the battery, so that it can change dynamically with the current health value. At the same time, the charging cut-off voltage can be accurately calculated each time to ensure that the available capacity of the battery is fully utilized within the life cycle, and the battery charging is safer, the use is more scientific, and the accuracy is high. At the same time, different parameters can be set according to different battery cells, and the compatibility is better.

[0044] Here, the battery type may include lead-acid batteries, lithium-ion batteries, nickel-hydrogen batteries, etc., which are not specifically limited in the embodiment of the present invention.

[0045] SOH is an important parameter used to evaluate the health and performance of a battery. It reflects the degree of performance degradation of the battery from manufacturing to the current moment. Specifically, SOH covers the battery's energy storage capacity, electrical performance, and working conditions under specific conditions of use. As the battery is used for a longer time, its internal materials will gradually age, resulting in reduced capacity and increased internal resistance. These changes can be quantified and evaluated through SOH.

[0046] It is understandable that the method of dynamically calculating the charging cut-off voltage based on the battery health status can not only protect the battery and extend its service life, but also improve the charging efficiency and ensure safety, while also bringing a better user experience.

[0047] The method provided by the embodiment of the present invention obtains the first health value of the battery when the battery of the vehicle is in the initial health state, and obtains the second health value of the battery when the battery is in the terminal health state, and then obtains the current health value of the battery, and finally, dynamically adjusts the charging cut-off voltage of the vehicle based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit. This process dynamically calculates the current charging cut-off voltage based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit, so as to accurately calculate each charging cut-off voltage with the dynamic change of the health value, to ensure that the available capacity of the battery is fully utilized within the life cycle, the battery charging is safer, the use is more scientific, and the accuracy is high. In addition, different values ​​can be set according to different types of batteries, and the compatibility is better, that is, the accuracy and reliability of the charging cut-off voltage regulation are improved.

[0048] Based on the above embodiment, the first maximum allowable charging voltage upper limit is obtained when the battery of the vehicle is in an initial healthy state; The second highest allowable charging voltage upper limit is obtained when the battery of the vehicle is in a terminated health state.

[0049] Specifically, the first maximum allowable upper limit of the charging voltage is obtained when the battery of the vehicle is in an initial healthy state, and the first maximum allowable upper limit of the charging voltage can be represented by VBol.

[0050] The second highest allowable upper limit of the charging voltage is obtained when the battery of the vehicle is in a terminated health state, and the second highest allowable upper limit of the charging voltage can be represented by VEol.

[0051] It is understandable that the initial health state of a vehicle battery is usually regarded as the optimal state of the battery, and the terminal health state of a vehicle battery means that the battery can no longer safely and effectively provide the required power, that is, it has reached the end of its service life. Obtaining the first maximum allowable charging voltage upper limit corresponding to the initial health state of the vehicle battery and obtaining the second maximum allowable charging voltage upper limit corresponding to the terminal health state of the battery are helpful for the subsequent dynamic regulation of the charging cut-off voltage. A reasonable charging cut-off voltage helps to extend the battery's service life, improve charging efficiency, and ensure the safety of the battery and the vehicle.

[0052] Based on the above embodiment, step 130 includes: The charging cut-off voltage of the vehicle is dynamically adjusted based on the following formula: VCurrent=VBol-((VBol-VEol) (SOHBol-SOHCurrent) / (SOHBol–SOHEol)) Among them, VCurrent represents the charging cut-off voltage, VBol represents the first maximum allowable charging voltage upper limit, VEol represents the second maximum allowable charging voltage upper limit, SOHBol represents the first health value, SOHEol represents the second health value, and SOHCurrent represents the current health value.

[0053] It is understandable that the first health value, the second health value, the first maximum allowable charging voltage upper limit and the second maximum allowable charging voltage upper limit can take different values ​​according to different types of batteries, so as to have better compatibility.

[0054] Based on the above embodiment, step 130 further includes: Step 131 , taking the current charging cut-off voltage of the vehicle as the charging cut-off voltage of this charging, and executing charging control on the battery of the vehicle.

[0055] Specifically, combined with the scenario example, the battery of the vehicle is generally the power battery on the electric vehicle. The power battery provides electrical energy for the electric vehicle. The power battery is a storage battery and can be charged and discharged multiple times. In the process of cyclic charging and discharging of the power battery, the characteristics of the power battery will continue to change. For example, the internal resistance will continue to increase, the expansion force will continue to increase, and the capacity will continue to decay. Selecting a suitable charging cut-off voltage for the power battery based on the characteristics of the power battery can ensure the safe charging and discharging of the power battery.

[0056] When charging the battery of a vehicle, the charging cut-off voltage of this charging is first obtained. Here, the charging cut-off voltage of this charging is determined based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit.

[0057] That is, the vehicle's current charging cut-off voltage VCurrent value is input into the charging module and set as the current charging cut-off voltage value to ensure the safety of battery pack charging.

[0058] Based on the above embodiment, step 120 includes: Step 121, when the vehicle is in operation, obtain the current health value of the battery.

[0059] Specifically, since the current health value of the battery is relatively accurate when the vehicle is in operation, the BMS obtains the current health value of the battery when the vehicle is in operation.

[0060] When the vehicle is not in operation, the BMS obtains the current health value of the battery corresponding to the last time the vehicle was in operation.

[0061] Based on any of the above embodiments, Figure 2 This is the second flow chart of the electric vehicle charging control method provided by the present invention, such as Figure 2 As shown, the method includes: In the first step, when the battery of the vehicle is in an initial health state, a first health value of the battery and a corresponding first maximum allowable charging voltage upper limit are obtained.

[0062] The second step is to obtain a second health value of the battery and a corresponding second maximum allowable charging voltage upper limit when the battery is in a terminated health state.

[0063] The third step is to obtain the current health value of the battery when the vehicle is in operation, or to obtain the current health value of the battery corresponding to the last time the vehicle was in operation when the vehicle is not in operation.

[0064] The fourth step is to dynamically adjust the charging cut-off voltage of the vehicle based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit.

[0065] The fifth step is to use the current charging cut-off voltage of the vehicle as the charging cut-off voltage of this charging, and execute charging control on the battery of the vehicle.

[0066] The method provided in the embodiment of the present invention is aimed at the defects that the existing technical solutions mainly set a fixed charging cut-off voltage point, which leads to a large waste of the available capacity of the battery, a significant increase in the error, and even causes errors. The embodiment of the present invention is a linear adjustment method for the charging cut-off voltage of a power battery based on SOH. The current charging cut-off voltage can be dynamically calculated according to the SOH value of the battery, so as to achieve dynamic changes with the health value, and at the same time accurately calculate each charging cut-off voltage to ensure that the available capacity of the battery is fully utilized within the life cycle, and the battery charging is safer, the use is more scientific, and the accuracy is high; at the same time, different parameters can be set according to different battery cells, and the compatibility is better.

[0067] Based on any of the above embodiments, Figure 3 is a schematic diagram of a health value curve provided by the present invention, Figure 4 is a schematic diagram of the health value and charging cut-off voltage provided by the present invention, such as Figure 3 , Figure 4As shown, Figure 3 This is an implementation example of a certain model of our company. As the health value (SOH) decays, the battery consistency deteriorates, and the battery cell at the end of charging is overcharged, it is necessary to reduce the DOD (Depth of Discharge) range to increase safety. According to the charging cut-off voltage corresponding to different SOH, the voltage of the upper limit of charging in each cycle stage is calculated and adjusted, and the charging current is also adjusted accordingly.

[0068] Among them, the SOH measured curve ends its life at 1500 cycles (500,000 kilometers).

[0069] The first health value is 100%, i.e. SOHBol, and the first maximum allowable charging voltage is 4.22V, i.e. VBol; The second health value is 87.56%, namely SOHEol, and the second highest allowable charging voltage is 3.95V, namely VEol.

[0070] Depend on Figure 4 It can be seen that in actual use, the charging cut-off voltage of a certain cycle, namely VCurrent, is calculated.

[0071] 1. The ratio of the VCurrent voltage difference to the SOH difference is: (VBol–VCurrent) / (SOHBol–SOHCurrent) (Formula 1) 2. The ratio of voltage difference to SOH difference over the entire life cycle is: (VBol – VEol) / (SOHBol – SOHEol) (Formula 2) 3. The expressions in equation 1 and equation 2 represent the ratio of the charge cut-off voltage to the rate of change of the health value, which is given by Figure 4 It can be seen that the overall change rate of the curve of health value-charge cut-off voltage is basically the same. The closer the two curves are, the more equal their change rates are (in the extreme case, they completely overlap), that is, the ratio of the charge cut-off voltage to the health value change rate is linear, and as the number of cycles increases, the linearity increases. Therefore, the slopes of the two curves at different times are consistent, so Equation 1 is equal to Equation 2.

[0072] That is (VBol –VCurrent) / (SOHBol –SOHCurrent) = (VBol – VEol) / (SOHBol –SOHEol).

[0073] 4. Therefore, based on the above reasoning process, the charging cut-off voltage at any cycle can be calculated: VCurrent=VBol-((VBol-VEol) (SOHBol-SOHCurrent) / (SOHBol–SOHEol)). The electric vehicle charging control device provided by the present invention is described below. The electric vehicle charging control device described below and the electric vehicle charging control method described above can be referred to each other.

[0074] Based on any of the above embodiments, the present invention provides an electric vehicle charging control device, Figure 5 Schematic diagram of the structure of the electric vehicle charging control device provided by the present invention. Figure 5 As shown, the device comprises: A first acquisition unit 310, configured to acquire a first health value of the battery when the battery of the vehicle is in an initial health state, and to acquire a second health value of the battery when the battery is in a terminated health state; A second acquisition unit 320 is used to acquire a current health value of the battery; The control unit 330 is used to dynamically control the charging cut-off voltage of the vehicle based on the first health value, the second health value, the current health value, a first maximum allowable charging voltage upper limit, and a second maximum allowable charging voltage upper limit.

[0075] The device provided by the embodiment of the present invention obtains the first health value of the battery when the battery of the vehicle is in the initial health state, and obtains the second health value of the battery when the battery is in the terminal health state, and then obtains the current health value of the battery, and finally, dynamically adjusts the charging cut-off voltage of the vehicle based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit. This process dynamically calculates the current charging cut-off voltage based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit, so as to accurately calculate each charging cut-off voltage with the dynamic change of the health value, so as to ensure that the available capacity of the battery is fully utilized within the life cycle, the battery charging is safer, the use is more scientific, and the accuracy is high. In addition, different values ​​can be set according to different types of batteries, and the compatibility is better.

[0076] Based on any of the above embodiments, the first maximum allowable charging voltage upper limit is obtained when the battery of the vehicle is in an initial healthy state; The second highest allowable charging voltage upper limit is obtained when the battery of the vehicle is in a terminated health state.

[0077] Based on any of the above embodiments, the control unit 330 is specifically configured to: The charging cut-off voltage of the vehicle is dynamically adjusted based on the following formula: VCurrent=VBol-((VBol-VEol) (SOHBol-SOHCurrent) / (SOHBol–SOHEol)) Among them, VCurrent represents the charging cut-off voltage, VBol represents the first maximum allowable charging voltage upper limit, VEol represents the second maximum allowable charging voltage upper limit, SOHBol represents the first health value, SOHEol represents the second health value, and SOHCurrent represents the current health value.

[0078] Based on any of the above embodiments, it further includes a charging unit, wherein the charging unit is specifically used for: The current charging cut-off voltage of the vehicle is used as the charging cut-off voltage of this charging, and the charging control of the battery of the vehicle is performed.

[0079] Based on any of the foregoing embodiments, the second acquiring unit 320 is specifically configured to: When the vehicle is in a running state, a current health value of the battery is obtained.

[0080] Based on any of the above embodiments, the present invention further includes a unit for obtaining a current health value, wherein the unit for obtaining a current health value is specifically used to: When the vehicle is not in operation, a current health value of the battery corresponding to the last time the vehicle was in operation is obtained.

[0081] Figure 6 is a schematic diagram of the structure of the electronic device provided by the present invention, such as Figure 6 As shown, the electronic device may include: a processor 410, a communication interface 420, a memory 430 and a communication bus 440, wherein the processor 410, the communication interface 420 and the memory 430 communicate with each other through the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute the electric vehicle charging control method, which includes: when the battery of the vehicle is in an initial health state, obtaining a first health value of the battery, and when the battery is in a terminated health state, obtaining a second health value of the battery; obtaining the current health value of the battery; and dynamically adjusting the charging cut-off voltage of the vehicle based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit.

[0082] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0083] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the electric vehicle charging control method provided by the above-mentioned methods, which includes: when the battery of the vehicle is in an initial health state, obtaining a first health value of the battery, and when the battery is in a terminal health state, obtaining a second health value of the battery; obtaining a current health value of the battery; and dynamically adjusting the charging cut-off voltage of the vehicle based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit.

[0084] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it is implemented to execute the electric vehicle charging control method provided by the above-mentioned methods. The method includes: when the battery of the vehicle is in an initial health state, obtaining a first health value of the battery, and when the battery is in a terminal health state, obtaining a second health value of the battery; obtaining a current health value of the battery; and dynamically adjusting the charging cut-off voltage of the vehicle based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit.

[0085] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0086] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling charging of an electric vehicle, characterized in that: include: When a battery of a vehicle is in an initial health state, obtaining a first health value of the battery, and when the battery is in a terminated health state, obtaining a second health value of the battery; Obtaining the current health value of the battery; Dynamically adjusting a charging cut-off voltage of the vehicle based on the first health value, the second health value, the current health value, a first maximum allowable charging voltage upper limit, and a second maximum allowable charging voltage upper limit; The first maximum allowable charging voltage upper limit is obtained when the battery of the vehicle is in the initial health state; The second maximum allowable charging voltage upper limit is obtained when the battery of the vehicle is in the terminated health state; the dynamically adjusting the charging cut-off voltage of the vehicle based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit includes: The charging cut-off voltage of the vehicle is dynamically adjusted based on the following formula: VCurrent=VBol-((VBol-VEol) (SOHBol-SOHCurrent) / (SOHBol–SOHEol)); Among them, VCurrent represents the charging cut-off voltage, VBol represents the first maximum allowable charging voltage upper limit, VEol represents the second maximum allowable charging voltage upper limit, SOHBol represents the first health value, SOHEol represents the second health value, and SOHCurrent represents the current health value.

2. The electric vehicle charging control method according to claim 1, characterized in that: The method further comprises dynamically adjusting the charging cut-off voltage of the vehicle based on the first health value, the second health value, the current health value, the first maximum allowable charging voltage upper limit, and the second maximum allowable charging voltage upper limit, and then further comprising: The current charging cut-off voltage of the vehicle is used as the charging cut-off voltage of this charging, and the charging control of the battery of the vehicle is performed.

3. The electric vehicle charging control method according to claim 1, characterized in that: The obtaining the current health value of the battery includes: When the vehicle is in a running state, a current health value of the battery is obtained.

4. The electric vehicle charging control method according to claim 3, characterized in that: When the vehicle is in a running state, obtaining the current health value of the battery also includes: When the vehicle is not in operation, a current health value of the battery corresponding to the last time the vehicle was in operation is obtained.

5. An electric vehicle charging control device, characterized in that: include: a first acquiring unit, configured to acquire a first health value of the battery when the battery of the vehicle is in an initial health state, and to acquire a second health value of the battery when the battery is in a terminated health state; A second acquisition unit, used to acquire a current health value of the battery; a control unit, configured to dynamically control a charging cut-off voltage of the vehicle based on the first health value, the second health value, the current health value, a first maximum allowable charging voltage upper limit, and a second maximum allowable charging voltage upper limit; The first maximum allowable charging voltage upper limit is obtained when the battery of the vehicle is in the initial health state; The second maximum allowable charging voltage upper limit is obtained when the battery of the vehicle is in the terminated health state; The control unit comprises: The charging cut-off voltage of the vehicle is dynamically adjusted based on the following formula: VCurrent=VBol-((VBol-VEol) (SOHBol-SOHCurrent) / (SOHBol–SOHEol)); Among them, VCurrent represents the charging cut-off voltage, VBol represents the first maximum allowable charging voltage upper limit, VEol represents the second maximum allowable charging voltage upper limit, SOHBol represents the first health value, SOHEol represents the second health value, and SOHCurrent represents the current health value.

6. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the electric vehicle charging control method according to any one of claims 1 to 4 is implemented.

7. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the electric vehicle charging control method according to any one of claims 1 to 4 is implemented.

Images