Method, device and electronic device for adjusting charging request current

Abstract

The present invention provides a method, device and electronic device for adjusting a charging request current, including: during the charging process of a target power battery, obtaining the current overcharging current of the target power battery and the current chargeable capacity of the battery; determining, according to the current overcharging current and the current chargeable capacity of the battery, the target overcharging risk level corresponding to the current overcharging current and the current chargeable capacity of the battery in a preset overcharging risk level table; calculating an adjusted charging request current according to the target overcharging risk level, the current overcharging current and the current chargeable capacity of the battery, and requesting the adjusted charging request current from a charging pile, so that the actual charging current output by the charging pile is not greater than the current chargeable capacity of the battery. The method for adjusting the charging request current of the present invention can adjust the charging request current, so that the actual charging current output by the charging pile is not greater than the current chargeable capacity of the battery, thereby ensuring the charging safety of the target power battery.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle charging, and in particular, to a method, device, and electronic device for adjusting a charging request current. Background Art

[0002] New energy vehicles are the current trend in the development of the automotive industry, and the production and sales of new energy vehicles have increased rapidly year by year. For new energy vehicles, the safety of the power battery directly determines the performance and operation of the new energy vehicle, and the charging current of the power battery is an important parameter to ensure the safety of the power battery. If the charging current is too large, it will cause lithium plating on the negative electrode of the power battery, reduce the life of the power battery, and even pose a safety risk. Therefore, when charging the power battery, it is necessary to ensure that the charging current does not exceed the current chargeable capacity of the power battery.

[0003] During the actual charging process of the power battery, since the charging pile works in an outdoor high-intensity electromagnetic radiation environment for a long time, there is a risk of current control system failure. When the current control system of the charging pile fails, if the new energy vehicle still requests the charging current corresponding to the current chargeable capacity of the power battery from the charging pile, the actual charging current output by the charging pile may be higher than the current chargeable capacity of the power battery, thus causing the life of the power battery to decay or even thermal runaway.

[0004] Therefore, how to adjust the charging request current of the power battery has become a technical problem that needs to be solved urgently at present. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a method, device, and electronic device for adjusting a charging request current to alleviate the technical problem that the prior art cannot adjust the charging request current.

[0006] In a first aspect, an embodiment of the present invention provides a method for adjusting a charging request current, including:

[0007] During the charging process of a target power battery, obtain the current overcharging current of the target power battery and the current chargeable capacity of the battery, where the charging request current requested from the charging pile at the initial moment is the current corresponding to the current chargeable capacity of the battery;

[0008] According to the current overcharging current and the current chargeable capacity of the battery, determine the target overcharging risk level corresponding to the current overcharging current and the current chargeable capacity of the battery in a preset overcharging risk level table, where the overcharging risk level table is a correspondence table of overcharging current, battery chargeable capacity, and overcharging risk level;

[0009] Calculate the adjusted charging request current according to the target overcharging risk level, the current overcharging current, and the current chargeable capacity of the battery, and request the adjusted charging request current from the charging pile, so that the actual charging current output by the charging pile is not greater than the current chargeable capacity of the battery.

[0010] Further, obtaining the current overcharging current and the current chargeable capacity of the target power battery includes:

[0011] Obtain the current SOC, current SOH, and current ambient temperature of the target power battery;

[0012] Determine the current chargeable capacity of the target power battery based on the current SOC, current SOH, and the current ambient temperature of the target power battery;

[0013] Obtain the current actual charging current output by the charging pile, and calculate the current overcharging current of the target power battery according to the current actual charging current and the current chargeable capacity of the battery.

[0014] Further, calculating the adjusted charging request current according to the target overcharging risk level, the current overcharging current, and the current chargeable capacity of the battery includes:

[0015] Calculate according to the charging request current calculation formula I2 = I - △I i Calculate the adjusted charging request current, where I2 represents the adjusted charging request current, I represents the current chargeable capacity of the battery, and △I i represents the current offset of the i-th time, △I i = △I i-1 + w * I1, △I i-1 represents the current offset of the (i - 1)-th time, w represents the target overcharging risk level, I1 represents the current overcharging current, and the value of the current offset △I0 of the 0-th time is 0.

[0016] Further, the method further includes:

[0017] Obtain multiple overcharging current sets, preset membership functions corresponding to the overcharging currents, multiple battery chargeable capacity sets, preset membership functions corresponding to the battery chargeable capacities, multiple overcharging risk level sets, and overcharging risk levels corresponding to each of the overcharging risk level sets;

[0018] Establish a first correspondence table between the multiple overcharging current sets, the multiple battery chargeable capacity sets, and the multiple overcharging risk level sets according to the user's settings;

[0019] Construct the overcharge danger level table based on the first correspondence table, the preset membership function corresponding to the overcharge current, the preset membership function corresponding to the battery rechargeable capacity, and the overcharge danger level corresponding to each overcharge danger level set.

[0020] Further, constructing the overcharge danger level table based on the first correspondence table, the preset membership function corresponding to the overcharge current, the preset membership function corresponding to the battery rechargeable capacity, and the overcharge danger level corresponding to each overcharge danger level set includes:

[0021] Obtain the target overcharge current, and determine the first membership degree of the target overcharge current in each overcharge current set according to the target overcharge current and the preset membership function corresponding to the overcharge current, where the target overcharge current is any overcharge current;

[0022] Obtain the target battery rechargeable capacity, and determine the second membership degree of the target battery rechargeable capacity in each battery rechargeable capacity set according to the target battery rechargeable capacity and the preset membership function corresponding to the battery rechargeable capacity, where the target battery rechargeable capacity is any battery rechargeable capacity;

[0023] Determine the third membership degree of the target overcharge current and the target battery rechargeable capacity in each overcharge danger level set based on the first membership degree, the second membership degree, and the first correspondence table;

[0024] Perform a weighted sum of the third membership degree of the target overcharge current and the target battery rechargeable capacity in each overcharge danger level set and the overcharge danger level corresponding to each overcharge danger level set to obtain the overcharge danger level corresponding to the target overcharge current and the target battery rechargeable capacity, and further obtain the overcharge danger level table.

[0025] Further, the method further includes:

[0026] Obtain multiple overcharge current sets, the preset membership function corresponding to the overcharge current, multiple battery rechargeable capacity sets, the preset membership function corresponding to the battery rechargeable capacity, and multiple pre-trained overcharge danger level models;

[0027] Obtain the target overcharge current, and determine the first membership degree of the target overcharge current in each overcharge current set according to the target overcharge current and the preset membership function corresponding to the overcharge current, where the target overcharge current is any overcharge current;

[0028] Obtain the rechargeable capacity of the target battery, and determine the second membership degree of the rechargeable capacity of the target battery in each set of battery rechargeable capacities according to the rechargeable capacity of the target battery and the preset membership function corresponding to the battery rechargeable capacity, where the rechargeable capacity of the target battery is any battery rechargeable capacity;

[0029] Calculate the weight corresponding to each overcharge hazard degree model according to the first membership degree and the second membership degree;

[0030] Input the target overcharge current and the rechargeable capacity of the target battery into each overcharge hazard degree model, and output the overcharge hazard degree corresponding to each overcharge hazard degree model;

[0031] Perform a weighted sum calculation on the weight corresponding to each overcharge hazard degree model and the overcharge hazard degree corresponding to each overcharge hazard degree model to obtain the overcharge hazard degree corresponding to the target overcharge current and the rechargeable capacity of the target battery, and further obtain the overcharge hazard degree table.

[0032] Further, the preset membership function corresponding to the overcharge current is a linear function or a Gaussian distribution function; the preset membership function corresponding to the battery rechargeable capacity is a linear function or a Gaussian distribution function.

[0033] In a second aspect, an embodiment of the present invention further provides an adjustment device for a charging request current, including:

[0034] An acquisition unit, configured to acquire the current overcharge current and the current rechargeable capacity of the battery of the target power battery during the charging process of the target power battery, where the charging request current requested from the charging pile at the initial moment is the current corresponding to the current rechargeable capacity of the battery;

[0035] A determination unit, configured to determine the target overcharge hazard degree corresponding to the current overcharge current and the current rechargeable capacity of the battery in a preset overcharge hazard degree table according to the current overcharge current and the current rechargeable capacity of the battery, where the overcharge hazard degree table is a correspondence table of overcharge current, battery rechargeable capacity and overcharge hazard degree;

[0036] A calculation unit, configured to calculate the adjusted charging request current according to the target overcharge hazard degree, the current overcharge current and the current rechargeable capacity of the battery, and request the adjusted charging request current from the charging pile.

[0037] In a third aspect, an embodiment of the present invention further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the steps of the method according to any one of the above first aspects are implemented.

[0038] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium storing machine-executable instructions. When the machine-executable instructions are called and executed by a processor, the machine-executable instructions cause the processor to execute the method according to any one of the above first aspects.

[0039] In an embodiment of the present invention, a method for adjusting a charging request current is provided, including: during the charging process of a target power battery, obtaining the current overcharging current of the target power battery and the current chargeable capacity of the battery, where the charging request current requested from a charging pile at the initial moment is the current corresponding to the current chargeable capacity of the battery; determining, according to the current overcharging current and the current chargeable capacity of the battery, a target overcharging risk level corresponding to the current overcharging current and the current chargeable capacity of the battery in a preset overcharging risk level table, where the overcharging risk level table is a correspondence table of overcharging current, battery chargeable capacity, and overcharging risk level; calculating an adjusted charging request current according to the target overcharging risk level, the current overcharging current, and the current chargeable capacity of the battery, and requesting the adjusted charging request current from the charging pile, so that the actual charging current output by the charging pile is not greater than the current chargeable capacity of the battery. It can be seen from the above description that the method for adjusting the charging request current of the present invention can adjust the charging request current, so that the actual charging current output by the charging pile is not greater than the current chargeable capacity of the battery, thereby ensuring the charging safety of the target power battery and alleviating the technical problem that the charging request current cannot be adjusted in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 It is a flowchart of a method for adjusting a charging request current provided by an embodiment of the present invention;

[0042] Figure 2 It is a flowchart of a method for constructing an overcharging risk level table provided by an embodiment of the present invention;

[0043] Figure 3 Schematic diagram of the case where the preset membership function corresponding to the overcharge current provided by the embodiment of the present invention is a linear function;

[0044] Figure 4 Schematic diagram of the case where the preset membership function corresponding to the rechargeable capacity of the battery provided by the embodiment of the present invention is a linear function;

[0045] Figure 5 Flow chart of constructing an overcharge risk degree table based on the first correspondence table, the preset membership function corresponding to the overcharge current, the preset membership function corresponding to the rechargeable capacity of the battery, and the overcharge risk degree corresponding to each overcharge risk degree set;

[0046] Figure 6 Another flow chart of constructing an overcharge risk degree table provided by the embodiment of the present invention;

[0047] Figure 7 Schematic diagram of the overcharge risk degree table provided by the embodiment of the present invention;

[0048] Figure 8 Schematic diagram of an adjustment device for the charging request current provided by the embodiment of the present invention;

[0049] Figure 9 Schematic diagram of an electronic device provided by the embodiment of the present invention. Detailed implementation manners

[0050] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0051] When the prior art charges a target power battery, the charging request current requested by a new energy vehicle from a charging pile is the current corresponding to the current rechargeable capacity of the battery. However, when a current control system failure occurs in the charging pile, the actual charging current output by the charging pile may be higher than the current rechargeable capacity of the target power battery. In this way, the life of the target power battery will be attenuated or even thermal runaway will occur.

[0052] Based on this, the charging request current adjustment method of the present invention can adjust the charging request current so that the actual charging current output by the charging pile is not greater than the current rechargeable capacity of the battery, thereby ensuring the charging safety of the target power battery.

[0053] For ease of understanding this embodiment, first, a method for adjusting the charging request current disclosed in the embodiments of the present invention will be introduced in detail.

[0054] Embodiment 1:

[0055] According to the embodiments of the present invention, an embodiment of a method for adjusting the charging request current is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0056] Figure 1 is a flowchart of a method for adjusting the charging request current according to the embodiments of the present invention. As Figure 1 shown, the method includes the following steps:

[0057] Step S102, during the charging process of the target power battery, obtain the current overcharging current of the target power battery and the current chargeable capacity of the battery. Among them, the charging request current requested from the charging pile at the initial moment is the current corresponding to the current chargeable capacity of the battery;

[0058] In the embodiments of the present invention, the method for adjusting the charging request current can be applied to the BMS system of new energy vehicles. The above-mentioned current overcharging current is the difference between the current actual charging current output by the charging pile and the current chargeable capacity of the battery, and the current chargeable capacity of the battery is obtained by the BMS system through look-up tables.

[0059] Step S104, according to the current overcharging current and the current chargeable capacity of the battery, determine the target overcharging risk level corresponding to the current overcharging current and the current chargeable capacity of the battery in a preset overcharging risk level table, where the overcharging risk level table is a correspondence table of overcharging current, battery chargeable capacity, and overcharging risk level;

[0060] Specifically, the above-mentioned overcharging risk level table is the charging risk level table of the target power battery. For target power batteries with different models, their corresponding charging risk level tables are also different. The construction process of the charging risk level table will be introduced in detail later.

[0061] Step S106, calculate the adjusted charging request current according to the target overcharging risk level, the current overcharging current, and the current chargeable capacity of the battery, and request the adjusted charging request current from the charging pile, so that the actual charging current output by the charging pile does not exceed the current chargeable capacity of the battery.

[0062] It should be noted that after requesting the adjusted charging request current from the charging pile, the process of returning to execute the above step S102 is repeated until the actual charging current output by the charging pile is not greater than the current chargeable capacity of the battery.

[0063] The process of calculating the adjusted charging request current will be introduced in detail later.

[0064] In an embodiment of the present invention, a method for adjusting the charging request current is provided, including: during the charging process of the target power battery, obtaining the current overcharging current of the target power battery and the current chargeable capacity of the battery. Among them, the charging request current requested from the charging pile at the initial moment is the current corresponding to the current chargeable capacity of the battery; according to the current overcharging current and the current chargeable capacity of the battery, determining the target overcharging risk level corresponding to the current overcharging current and the current chargeable capacity of the battery in a preset overcharging risk level table, where the overcharging risk level table is a correspondence table of overcharging current, battery chargeable capacity, and overcharging risk level; calculating the adjusted charging request current according to the target overcharging risk level, the current overcharging current, and the current chargeable capacity of the battery, and requesting the adjusted charging request current from the charging pile, so that the actual charging current output by the charging pile is not greater than the current chargeable capacity of the battery. Through the above description, it can be seen that the method for adjusting the charging request current of the present invention can adjust the charging request current, so that the actual charging current output by the charging pile is not greater than the current chargeable capacity of the battery, thereby ensuring the charging safety of the target power battery and alleviating the technical problem that the prior art cannot adjust the charging request current.

[0065] The above content briefly introduces the method for adjusting the charging request current of the present invention. The following will describe the specific content involved in detail.

[0066] In an optional embodiment of the present invention, the above step S102, obtaining the current overcharging current of the target power battery and the current chargeable capacity of the battery, specifically includes the following steps:

[0067] (1) Obtaining the current SOC, current SOH, and current ambient temperature of the target power battery;

[0068] (2) Determining the current chargeable capacity of the target power battery based on the current SOC, current SOH, and current ambient temperature of the target power battery;

[0069] Specifically, searching for the target maximum allowable current corresponding to the current SOC, current SOH, and current ambient temperature of the target power battery in the temperature - SOC - SOH and maximum allowable current table, and then using the above target maximum allowable current as the current chargeable capacity of the battery.

[0070] It should be noted that if there is a limited current fault in the new energy vehicle, after obtaining the target maximum allowable current by looking up the table, the smaller value between the target maximum allowable current and the limited current is determined as the current rechargeable capacity of the battery.

[0071] (3) Obtain the current actual charging current output by the charging pile, and calculate the current overcharging current of the target power battery according to the current actual charging current and the current rechargeable capacity of the battery.

[0072] Specifically, the BMS of the new energy vehicle obtains the current actual charging current output by the charging pile from the charging pile, and then calculates the difference between the current actual charging current and the current rechargeable capacity of the battery to obtain the current overcharging current of the target power battery.

[0073] In an alternative embodiment of the present invention, calculating the adjusted charging request current according to the target overcharging risk level, the current overcharging current, and the current rechargeable capacity of the battery specifically includes:

[0074] Calculate the adjusted charging request current according to the charging request current calculation formula I2 = I - △I i Calculate the adjusted charging request current, where I2 represents the adjusted charging request current, I represents the current rechargeable capacity of the battery, and △I i represents the current offset at the i-th time, and △I i = △I i-1 + w * I1, where △I i-1 represents the current offset at the (i - 1)-th time, w represents the target overcharging risk level, I1 represents the current overcharging current, and the value of the current offset △I0 at the 0-th time is 0.

[0075] For example, if the current overcharging current is 30 and the target overcharging risk level is 100%, then the current offset △I1 at the first time = △I0 + 100% * 30 = 30, and the adjusted charging request current I2 = I - 30. If after adjustment, the actual charging current output by the charging pile is still greater than the current rechargeable capacity of the battery, then the current offset is accumulated and adjusted again. By this way, the adjustment of the charging request current can quickly make the actual charging current output by the charging pile not greater than the current rechargeable capacity of the battery, that is, the adjustment efficiency is high and it is safer.

[0076] The process of constructing the overcharging risk level table is introduced below:

[0077] In the embodiment of the present invention, two schemes for constructing the overcharging risk level table are given, and these two schemes are introduced respectively below:

[0078] Scheme 1:

[0079] Refer to Figure 2, the specific steps for constructing the overcharge danger degree table are as follows:

[0080] Step S201, obtain multiple overcharge current sets, the preset membership functions corresponding to the overcharge currents, multiple battery rechargeable capacity sets, the preset membership functions corresponding to the battery rechargeable capacities, multiple overcharge danger degree sets, and the overcharge danger degrees corresponding to each overcharge danger degree set;

[0081] Specifically, the multiple overcharge current sets can be {S, M, L} (determined by analyzing the target power battery according to expert experience), which are respectively small, medium, and large overcharge currents. The overcharge current corresponding to the overcharge current set S can be 0A, the overcharge current corresponding to the overcharge current set M can be 10A, and the overcharge current corresponding to the overcharge current set L can be 20A. The embodiments of the present invention do not specifically limit the above overcharge current sets. For other power batteries, the above overcharge current sets and the overcharge currents corresponding to the overcharge current sets can also be changed according to expert experience.

[0082] The preset membership functions corresponding to the above overcharge currents can be linear functions or Gaussian distribution functions. Figure 3 shows a schematic diagram of the case where the preset membership function corresponding to the overcharge current is a linear function.

[0083] The above multiple battery rechargeable capacity sets can be {S, M, L} (determined by analyzing the target power battery according to expert experience), which are respectively strong, medium, and weak battery rechargeable capacities. The battery rechargeable capacity corresponding to the battery rechargeable capacity set S can be 100A, the battery rechargeable capacity corresponding to the battery rechargeable capacity set M can be 50A, and the battery rechargeable capacity corresponding to the battery rechargeable capacity set L can be 0A. The embodiments of the present invention do not specifically limit the above battery rechargeable capacity sets. For other power batteries, the above battery rechargeable capacity sets and the battery rechargeable capacities corresponding to the battery rechargeable capacity sets can also be changed according to expert experience.

[0084] The preset membership functions corresponding to the above battery rechargeable capacities can be linear functions or Gaussian distribution functions. Figure 4 shows a schematic diagram of the case where the preset membership function corresponding to the battery rechargeable capacity is a linear function.

[0085] The above overcharge danger level set can be {S, M, L} (determined by analyzing the target power battery according to expert experience), which are low, medium, and high overcharge danger levels respectively. The overcharge danger level corresponding to the overcharge danger level set S can be 0%, the overcharge danger level corresponding to the overcharge danger level set M can be 50%, and the overcharge danger level corresponding to the overcharge danger level set L can be 100%. The embodiments of the present invention do not specifically limit the above overcharge danger level set. For other power batteries, the above overcharge danger level set and the overcharge danger levels corresponding to the overcharge danger level set can also be changed according to expert experience.

[0086] Step S202, establish a first correspondence table between multiple overcharge current sets, multiple battery chargeable capacity sets, and multiple overcharge danger level sets according to the user's settings;

[0087] Specifically, establish a first correspondence table between multiple overcharge current sets, multiple battery chargeable capacity sets, and multiple overcharge danger level sets according to expert experience. For example, when the overcharge current is small and the battery chargeable capacity is strong, the corresponding overcharge danger level is low; when the overcharge current is large and the battery chargeable capacity is weak, the corresponding overcharge danger level is high.

[0088] The above first correspondence table can be:

[0089]

[0090] Step S203, construct an overcharge danger level table based on the first correspondence table, the preset membership function corresponding to the overcharge current, the preset membership function corresponding to the battery chargeable capacity, and the overcharge danger levels corresponding to each overcharge danger level set.

[0091] Reference Figure 5 , specifically including the following steps:

[0092] Step S501, obtain the target overcharge current, and determine the first membership degree of the target overcharge current in each overcharge current set according to the target overcharge current and the preset membership function corresponding to the overcharge current, where the target overcharge current is any overcharge current;

[0093] To facilitate a better understanding of this process, the following is a specific example for illustration:

[0094] If the target overcharge current is 5A, through Figure 3It can be known that the membership degree of the 5A in the overcharge current set S is 50%, the membership degree in the overcharge current set M is 50%, and the membership degree in the overcharge current set L is 0% (the value of the ordinate corresponding to the point with abscissa 5A). It can be verified that 5A = 50%S + 50%M + 0%L. That is, the above-mentioned first membership degree is 50% in the overcharge current set S, 50% in the overcharge current set M, and 0% in the overcharge current set L.

[0095] Step S502: Obtain the rechargeable capacity of the target battery, and determine the second membership degree of the rechargeable capacity of the target battery in each battery rechargeable capacity set according to the rechargeable capacity of the target battery and the preset membership function corresponding to the battery rechargeable capacity, where the rechargeable capacity of the target battery is any battery rechargeable capacity;

[0096] If the rechargeable capacity of the target battery is 50A, through Figure 4 It can be known that the membership degree of the 50A in the battery rechargeable capacity set S is 0%, the membership degree in the battery rechargeable capacity set M is 100%, and the membership degree in the battery rechargeable capacity set L is 0% (the value of the ordinate corresponding to the point with abscissa 50A). It can be verified that 50A = 0%S + 100%M + 0%L. That is, the above-mentioned second membership degree is 0% in the battery rechargeable capacity set S, 100% in the battery rechargeable capacity set M, and 0% in the battery rechargeable capacity set L.

[0097] Step S503: Determine the third membership degree of the target overcharge current and the rechargeable capacity of the target battery in each overcharge danger degree set based on the first membership degree, the second membership degree, and the first correspondence table;

[0098] Specifically, as can be seen from the above example, the target overcharge current is 5A and the rechargeable capacity of the target battery is 50A. There is a 50% third membership degree for S, M (that is, the product of the first membership degree of 50% of the target overcharge current of 5A in the overcharge current set S and the second membership degree of 100% of the rechargeable capacity of the target battery of 50A in the battery rechargeable capacity set M), and there is a 50% third membership degree for M, M (that is, the product of the first membership degree of 50% of the target overcharge current of 5A in the overcharge current set M and the second membership degree of 100% of the rechargeable capacity of the target battery of 50A in the battery rechargeable capacity set M). And according to the first correspondence table, the overcharge danger degree set corresponding to the overcharge current set S and the battery rechargeable capacity set M is S, that is, the third membership degree in the overcharge danger degree set S is 50%, and the third membership degree in the overcharge danger degree set M is 50%.

[0099] Step S504: Calculate the weighted sum of the third membership degrees of the target overcharge current and the target battery rechargeability in each overcharge danger level set and the overcharge danger level corresponding to each overcharge danger level set, to obtain the overcharge danger level corresponding to the target overcharge current and the target battery rechargeability, and then obtain the overcharge danger level table.

[0100] Specifically, as an example in the above Step S503, the third membership degree of the target overcharge current of 5A and the target battery rechargeability of 50A in the overcharge danger level set S is 50%, and the overcharge danger level corresponding to the overcharge danger level set S is 0%. The third membership degree of the target overcharge current of 5A and the target battery rechargeability of 50A in the overcharge danger level set M is 50%, and the overcharge danger level corresponding to the overcharge danger level set M is 50%. Then, the overcharge danger level corresponding to the target overcharge current of 5A and the target battery rechargeability of 50A = 50% * 0% + 50% * 50% = 25%. Continuing in this way, the overcharge danger level table can be obtained.

[0101] Scheme Two:

[0102] Reference Figure 6 , the specific steps for constructing the overcharge danger level table are as follows:

[0103] Step S601: Obtain multiple overcharge current sets, preset membership functions corresponding to the overcharge currents, multiple battery rechargeability sets, preset membership functions corresponding to the battery rechargeabilities, and multiple pre-trained overcharge danger level models.

[0104] The specific contents of the above multiple overcharge current sets, preset membership functions corresponding to the overcharge currents, multiple battery rechargeability sets, and preset membership functions corresponding to the battery rechargeabilities can refer to the introduction in the above Step S201, and will not be elaborated here.

[0105] Among the above-mentioned multiple pre-trained overcharge danger level models, each overcharge danger level model corresponds to a set of overcharge currents and a set of battery rechargeable capacities. As in the above example, the set of overcharge currents has three types: S, M, and L, and the set of battery rechargeable capacities has three types: S, M, and L. Then the number of multiple overcharge danger level models is 9, corresponding to the set of overcharge currents S and the set of battery rechargeable capacities S, corresponding to the set of overcharge currents S and the set of battery rechargeable capacities M, corresponding to the set of overcharge currents S and the set of battery rechargeable capacities L, corresponding to the set of overcharge currents M and the set of battery rechargeable capacities S, corresponding to the set of overcharge currents M and the set of battery rechargeable capacities M, corresponding to the set of overcharge currents M and the set of battery rechargeable capacities L, corresponding to the set of overcharge currents L and the set of battery rechargeable capacities S, corresponding to the set of overcharge currents L and the set of battery rechargeable capacities M, corresponding to the set of overcharge currents L and the set of battery rechargeable capacities L. The multiple pre-trained overcharge danger level models can be pre-trained neural network models. Specifically, when implementing, overcharge-related data is collected to obtain the values of overcharge currents and the values of battery rechargeable capacities, and the values of overcharge currents and the values of battery rechargeable capacities are informed to relevant practitioners. The relevant practitioners label the overcharge danger levels corresponding to the values of overcharge currents and the values of battery rechargeable capacities (between 0% - 100%. For example, when the overcharge current is 20A and the battery rechargeable capacity is 50A, the label of the corresponding overcharge danger level marked by the practitioner is 82%). In this way, a large number of training samples are obtained, and the obtained training samples are used to train multiple initial overcharge danger level models. After the training is completed, multiple overcharge danger level models are obtained.

[0106] Specifically, the above-mentioned multiple overcharge danger level models can be f1 = p1 * x + q1 * y + r1, f2 = p2 * x + q2 * y + r2,..., f9 = p9 * x + q9 * y + r9. After the training is completed, the parameters p, q, and r therein are known parameters. x represents the target overcharge current, and y represents the target battery rechargeable capacity. The f1 overcharge danger level model is the overcharge danger level model corresponding to the set of overcharge currents S and the set of battery rechargeable capacities S, and the f2 overcharge danger level model is the overcharge danger level model corresponding to the set of overcharge currents S and the set of battery rechargeable capacities M, etc.

[0107] Compared with Solution 1, the solution of these multiple overcharge danger level models has better fault tolerance, and the overcharge danger level corresponding to each obtained overcharge danger level model is more accurate. Instead of fixedly setting the overcharge danger level corresponding to the overcharge danger level model S to 0%, the overcharge danger level corresponding to the overcharge danger level model M to 50%, and the overcharge danger level corresponding to the overcharge danger level model L to 100%, the more accurate overcharge danger level is calculated through machine learning.

[0108] Step S602: Obtain the target overcharge current, and determine the first membership degree of the target overcharge current in each overcharge current set according to the target overcharge current and the preset membership degree function corresponding to the overcharge current, where the target overcharge current is any overcharge current.

[0109] For the specific content, please refer to the introduction in Step S501 above, which will not be elaborated here.

[0110] Step S603: Obtain the target battery rechargeability, and determine the second membership degree of the target battery rechargeability in each battery rechargeability set according to the target battery rechargeability and the preset membership degree function corresponding to the battery rechargeability, where the target battery rechargeability is any battery rechargeability.

[0111] For the specific content, please refer to the introduction in Step S502 above, which will not be elaborated here.

[0112] Step S604: Calculate the weight corresponding to each overcharge danger level model according to the first membership degree and the second membership degree.

[0113] For example, in the examples of step S501 and step S502, the first membership degree of the target overcharge current of 5A in the overcharge current set S is 50%, the first membership degree in the overcharge current set M is 50%, and the first membership degree in the overcharge current set L is 0%. The second membership degree of the target battery rechargeable capacity of 50A in the battery rechargeable capacity set S is 0%, the second membership degree in the battery rechargeable capacity set M is 100%, and the second membership degree in the battery rechargeable capacity set L is 0%. Then, the weight of the f1 overcharge danger degree model corresponding to the overcharge current set S and the battery rechargeable capacity set S: w1 = 50% * 0% = 0; the weight of the f2 overcharge danger degree model corresponding to the overcharge current set S and the battery rechargeable capacity set M: w2 = 50% * 100% = 50%; the weight of the f3 overcharge danger degree model corresponding to the overcharge current set S and the battery rechargeable capacity set L: w3 = 50% * 0% = 0; the weight of the f4 overcharge danger degree model corresponding to the overcharge current set M and the battery rechargeable capacity set S: w4 = 50% * 0% = 0; the weight of the f5 overcharge danger degree model corresponding to the overcharge current set M and the battery rechargeable capacity set M: w5 = 50% * 100% = 50%; the weight of the f6 overcharge danger degree model corresponding to the overcharge current set M and the battery rechargeable capacity set L: w6 = 50% * 0% = 0; the weight of the f7 overcharge danger degree model corresponding to the overcharge current set L and the battery rechargeable capacity set S: w7 = 0% * 0% = 0; the weight of the f8 overcharge danger degree model corresponding to the overcharge current set L and the battery rechargeable capacity set M: w8 = 0% * 100% = 0; the weight of the f9 overcharge danger degree model corresponding to the overcharge current set L and the battery rechargeable capacity set L: w9 = 0% * 0% = 0.

[0114] Step S605, input the target overcharge current and the target battery rechargeable capacity into each overcharge danger degree model, and output the overcharge danger degree corresponding to each overcharge danger degree model;

[0115] Specifically, substitute the values of the target overcharge current x and the target battery rechargeable capacity y into f1 = p1 * x + q1 * y + r1, f2 = p2 * x + q2 * y + r2,..., f9 = p9 * x + q9 * y + r9, to obtain the overcharge danger degree corresponding to the f1 overcharge danger degree model (the overcharge danger degree model corresponding to the overcharge current set S and the battery rechargeable capacity set S), and obtain the overcharge danger degree corresponding to the f2 overcharge danger degree model (the overcharge danger degree model corresponding to the overcharge current set S and the battery rechargeable capacity set M), etc.

[0116] Step S606: Calculate the weighted sum of the weight corresponding to each overcharge risk degree model and the overcharge risk degree corresponding to each overcharge risk degree model to obtain the overcharge risk degree corresponding to the target overcharge current and the target battery rechargeable capacity, and then obtain the overcharge risk degree table.

[0117] Specifically, the overcharge risk degree corresponding to the target overcharge current of 5A and the target battery rechargeable capacity of 50A = w1*f 1+ w2*f2 + … + w9*f9. Proceeding in this way, the overcharge risk degree table can be obtained ( Figure 7 as shown in a certain overcharge risk degree table).

[0118] When the actual charging current output by the charging pile is too large, the method for adjusting the charging request current of the present invention can ensure that the final charging current is not greater than the battery rechargeable capacity, thus ensuring the charging safety of the power battery.

[0119] Embodiment 2:

[0120] The embodiment of the present invention also provides an apparatus for adjusting the charging request current. This apparatus for adjusting the charging request current is mainly used to execute the method for adjusting the charging request current provided in Embodiment 1 of the present invention. The following provides a specific introduction to the apparatus for adjusting the charging request current provided in the embodiment of the present invention.

[0121] Figure 8 is a schematic diagram of an apparatus for adjusting the charging request current according to an embodiment of the present invention. As Figure 8 shown, the apparatus mainly includes: an acquisition unit 10, a determination unit 20, and a calculation unit 30, where:

[0122] The acquisition unit is used to acquire the current overcharge current of the target power battery and the current rechargeable capacity of the battery during the charging process of the target power battery. Among them, the charging request current requested from the charging pile at the initial moment is the current corresponding to the current rechargeable capacity of the battery;

[0123] The determination unit is used to determine the target overcharge risk degree corresponding to the current overcharge current and the current rechargeable capacity of the battery in a preset overcharge risk degree table. The overcharge risk degree table is a corresponding relationship table of overcharge current, battery rechargeable capacity, and overcharge risk degree;

[0124] The calculation unit is used to calculate the adjusted charging request current according to the target overcharge risk degree, the current overcharge current, and the current rechargeable capacity of the battery, and request the adjusted charging request current from the charging pile.

[0125] In an embodiment of the present invention, a device for adjusting a charging request current is provided, including: during the charging process of a target power battery, obtaining the current overcharging current of the target power battery and the current chargeable capacity of the battery, where the charging request current requested from the charging pile at the initial moment is the current corresponding to the current chargeable capacity of the battery; determining, according to the current overcharging current and the current chargeable capacity of the battery, the target overcharging risk level corresponding to the current overcharging current and the current chargeable capacity of the battery in a preset overcharging risk level table, where the overcharging risk level table is a correspondence table of overcharging current, battery chargeable capacity, and overcharging risk level; calculating the adjusted charging request current according to the target overcharging risk level, the current overcharging current, and the current chargeable capacity of the battery, and requesting the adjusted charging request current from the charging pile, so that the actual charging current output by the charging pile is not greater than the current chargeable capacity of the battery. Through the above description, it can be seen that the device for adjusting the charging request current of the present invention can adjust the charging request current, so that the actual charging current output by the charging pile is not greater than the current chargeable capacity of the battery, thereby ensuring the charging safety of the target power battery and alleviating the technical problem that the prior art cannot adjust the charging request current.

[0126] Optionally, the obtaining unit is further configured to: obtain the current SOC, current SOH, and current ambient temperature of the target power battery; determine the current chargeable capacity of the target power battery based on the current SOC, current SOH, and current ambient temperature of the target power battery; obtain the current actual charging current output by the charging pile, and calculate the current overcharging current of the target power battery according to the current actual charging current and the current chargeable capacity of the battery.

[0127] Optionally, the calculating unit is further configured to: calculate the adjusted charging request current according to the charging request current calculation formula I2 = I - △I i where I2 represents the adjusted charging request current, I represents the current chargeable capacity of the battery, and △I i represents the current offset amount at the i-th time, and △I i = △I i-1 + w * I1, where △I i-1 represents the current offset amount at the (i - 1)-th time, w represents the target overcharging risk level, I1 represents the current overcharging current, and the value of the current offset amount △I0 at the 0-th time is 0.

[0128] Optionally, the device is further configured to: obtain multiple overcharge current sets, preset membership functions corresponding to the overcharge currents, multiple battery rechargeable capacity sets, preset membership functions corresponding to the battery rechargeable capacities, multiple overcharge danger level sets, and the overcharge danger levels corresponding to each overcharge danger level set; establish a first correspondence table between the multiple overcharge current sets, the multiple battery rechargeable capacity sets, and the multiple overcharge danger level sets according to user settings; and construct an overcharge danger level table based on the first correspondence table, the preset membership functions corresponding to the overcharge currents, the preset membership functions corresponding to the battery rechargeable capacities, and the overcharge danger levels corresponding to each overcharge danger level set.

[0129] Optionally, the device is further configured to: obtain a target overcharge current, and determine a first membership degree of the target overcharge current in each overcharge current set according to the target overcharge current and the preset membership function corresponding to the overcharge current, where the target overcharge current is any overcharge current; obtain a target battery rechargeable capacity, and determine a second membership degree of the target battery rechargeable capacity in each battery rechargeable capacity set according to the target battery rechargeable capacity and the preset membership function corresponding to the battery rechargeable capacity, where the target battery rechargeable capacity is any battery rechargeable capacity; determine a third membership degree of the target overcharge current and the target battery rechargeable capacity in each overcharge danger level set based on the first membership degree, the second membership degree, and the first correspondence table; and perform a weighted sum of the third membership degrees of the target overcharge current and the target battery rechargeable capacity in each overcharge danger level set and the overcharge danger levels corresponding to each overcharge danger level set to obtain the overcharge danger level corresponding to the target overcharge current and the target battery rechargeable capacity, thereby obtaining the overcharge danger level table.

[0130] Optionally, the device is further configured to: obtain a plurality of overcharge current sets, preset membership functions corresponding to the overcharge currents, a plurality of battery rechargeable capacity sets, preset membership functions corresponding to the battery rechargeable capacities, and a plurality of pre-trained overcharge hazard degree models; obtain a target overcharge current, and determine a first membership degree of the target overcharge current in each overcharge current set according to the target overcharge current and the preset membership function corresponding to the overcharge current, where the target overcharge current is any overcharge current; obtain a target battery rechargeable capacity, and determine a second membership degree of the target battery rechargeable capacity in each battery rechargeable capacity set according to the target battery rechargeable capacity and the preset membership function corresponding to the battery rechargeable capacity, where the target battery rechargeable capacity is any battery rechargeable capacity; calculate the weight corresponding to each overcharge hazard degree model according to the first membership degree and the second membership degree; input the target overcharge current and the target battery rechargeable capacity into each overcharge hazard degree model, and output the overcharge hazard degree corresponding to each overcharge hazard degree model; perform a weighted sum calculation on the weight corresponding to each overcharge hazard degree model and the overcharge hazard degree corresponding to each overcharge hazard degree model to obtain the overcharge hazard degree corresponding to the target overcharge current and the target battery rechargeable capacity, and further obtain an overcharge hazard degree table.

[0131] Optionally, the preset membership function corresponding to the overcharge current is a linear function or a Gaussian distribution function; the preset membership function corresponding to the battery rechargeable capacity is a linear function or a Gaussian distribution function.

[0132] The device provided in the embodiment of the present invention has the same implementation principle and technical effects as those in the foregoing method embodiment. For a brief description, for the parts not mentioned in the device embodiment, reference may be made to the corresponding content in the foregoing method embodiment.

[0133] As Figure 9 shown, an electronic device 600 provided in an embodiment of the present application includes: a processor 601, a memory 602, and a bus. The memory 602 stores machine-readable instructions executable by the processor 601. When the electronic device runs, the processor 601 communicates with the memory 602 through the bus, and the processor 601 executes the machine-readable instructions to perform the steps of the method for adjusting and determining the charging request current as described above.

[0134] Specifically, the foregoing memory 602 and processor 601 can be general-purpose memory and processor, which are not specifically limited here. When the processor 601 runs the computer program stored in the memory 602, it can execute the method for adjusting and determining the charging request current as described above.

[0135] The processor 601 may be an integrated circuit chip with the ability to process signals. In the implementation process, each step of the above method can be completed by the integrated logic circuit in the hardware of the processor 601 or the instructions in the form of software. The above-mentioned processor 601 may be a general-purpose processor, including a central processing unit (CPU for short), a network processor (NP for short), etc.; it may also be a digital signal processor (DSP for short), an application specific integrated circuit (ASIC for short), a field-programmable gate array (FPGA for short), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the art 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. This storage medium is located in the memory 602, and the processor 601 reads the information in the memory 602 and combines its hardware to complete the steps of the above method.

[0136] Corresponding to the above method for determining the adjustment of the charging request current, an embodiment of the present application also provides a computer-readable storage medium. The computer-readable storage medium stores machine-executable instructions. When the computer-executable instructions are called and run by a processor, the computer-executable instructions cause the processor to run the steps of the above method for determining the adjustment of the charging request current.

[0137] The device for determining the adjustment of the charging request current provided by the embodiments of the present application may be specific hardware on the device or software or firmware installed on the device, etc. For the device provided by the embodiments of the present application, the implementation principle and the technical effects produced are the same as those of the foregoing method embodiments. For the sake of brief description, for the parts not mentioned in the device embodiments, reference may be made to the corresponding content in the foregoing method embodiments. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can all refer to the corresponding processes in the above method embodiments, and will not be repeated here.

[0138] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the couplings or direct couplings or communication connections shown or discussed with each other can be through some communication interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical or other forms.

[0139] For another example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions, and operations of devices, methods, and computer program products according to multiple embodiments of the present application. In this regard, each block in the flowchart or block diagram can represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than that marked in the accompanying drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, as well as the combinations of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0140] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place, or can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0141] In addition, the functional units in the embodiments provided in the present application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0142] When the above-mentioned functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing an electronic device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the vehicle marking method described in various embodiments of this application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs.

[0143] It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0144] Finally, it should be noted that: the above-mentioned embodiments are only specific implementation manners of this application, used to illustrate the technical solution of this application, rather than limiting it. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed in this application can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes, or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of this application. All should be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A method for adjusting a charging request current, characterized in that, Including: During the charging process of the target power battery, obtain the current overcharging current of the target power battery and the current rechargeable capacity of the battery, where the charging request current requested from the charging pile at the initial moment is the current corresponding to the current rechargeable capacity of the battery; According to the current overcharging current and the current rechargeable capacity of the battery, determine the target overcharging risk level corresponding to the current overcharging current and the current rechargeable capacity of the battery in a preset overcharging risk level table, where the overcharging risk level table is a correspondence table of overcharging current, battery rechargeable capacity and overcharging risk level; Calculate the adjusted charging request current according to the target overcharging risk level, the current overcharging current and the current rechargeable capacity of the battery, and request the adjusted charging request current from the charging pile, so that the actual charging current output by the charging pile is not greater than the current rechargeable capacity of the battery; Among them, obtaining the current overcharging current of the target power battery and the current rechargeable capacity of the battery includes: Obtain the current SOC, current SOH and current ambient temperature of the target power battery; Determine the current rechargeable capacity of the target power battery based on the current SOC, current SOH and the current ambient temperature of the target power battery; Obtain the current actual charging current output by the charging pile, and calculate the current overcharging current of the target power battery according to the current actual charging current and the current rechargeable capacity of the battery; Among them, calculating the adjusted charging request current according to the target overcharging risk level, the current overcharging current and the current rechargeable capacity of the battery includes: Calculate the adjusted charging request current according to the charging request current calculation formula I2 = I - △I i Calculate the adjusted charging request current, where I2 represents the adjusted charging request current, I represents the current chargeable capacity of the battery, and △I i represents the current offset of the i-th time, △I i = △I i-1 + w * I1, △I i-1 represents the current offset of the (i - 1)-th time, w represents the target overcharging risk level, I1 represents the current overcharging current, and the value of the current offset △I0 of the 0-th time is 0.

2. The method according to claim 1, wherein The method further includes: Obtain multiple overcharging current sets, preset membership functions corresponding to the overcharging currents, multiple battery rechargeable capacity sets, preset membership functions corresponding to the battery rechargeable capacities, multiple overcharging risk level sets, and the overcharging risk levels corresponding to each of the overcharging risk level sets; Establish a first correspondence table between the multiple overcharging current sets, the multiple battery rechargeable capacity sets and the multiple overcharging risk level sets according to the user's settings; Construct the overcharging risk level table based on the first correspondence table, the preset membership functions corresponding to the overcharging currents, the preset membership functions corresponding to the battery rechargeable capacities, and the overcharging risk levels corresponding to each of the overcharging risk level sets.

3. The method according to claim 2, characterized in that, Constructing the overcharging risk level table based on the first correspondence table, the preset membership functions corresponding to the overcharging currents, the preset membership functions corresponding to the battery rechargeable capacities, and the overcharging risk levels corresponding to each of the overcharging risk level sets includes: Obtain the target overcharging current, and determine the first membership degree of the target overcharging current in each of the overcharging current sets according to the target overcharging current and the preset membership function corresponding to the overcharging current, where the target overcharging current is any overcharging current; Obtain the rechargeable capacity of the target battery, and determine the second membership degree of the rechargeable capacity of the target battery in each set of battery rechargeable capacities according to the rechargeable capacity of the target battery and the preset membership function corresponding to the battery rechargeable capacity, where the rechargeable capacity of the target battery is any battery rechargeable capacity; Based on the first membership degree, the second membership degree, and the first correspondence table, determine the third membership degree of the target overcharge current and the rechargeable capacity of the target battery in each set of overcharge danger levels; Perform a weighted sum of the third membership degree of the target overcharge current and the rechargeable capacity of the target battery in each set of overcharge danger levels and the overcharge danger level corresponding to each set of overcharge danger levels to obtain the overcharge danger level corresponding to the target overcharge current and the rechargeable capacity of the target battery, and further obtain the overcharge danger level table.

4. The method according to claim 1, wherein The method further includes: Obtain multiple sets of overcharge currents, preset membership functions corresponding to the overcharge currents, multiple sets of battery rechargeable capacities, preset membership functions corresponding to the battery rechargeable capacities, and multiple pre-trained overcharge danger level models; Obtain a target overcharge current, and determine the first membership degree of the target overcharge current in each set of overcharge currents according to the target overcharge current and the preset membership function corresponding to the overcharge current, where the target overcharge current is any overcharge current; Obtain the rechargeable capacity of the target battery, and determine the second membership degree of the rechargeable capacity of the target battery in each set of battery rechargeable capacities according to the rechargeable capacity of the target battery and the preset membership function corresponding to the battery rechargeable capacity, where the rechargeable capacity of the target battery is any battery rechargeable capacity; Calculate the weight corresponding to each overcharge danger level model according to the first membership degree and the second membership degree; Input the target overcharge current and the rechargeable capacity of the target battery into each overcharge danger level model, and output the overcharge danger level corresponding to each overcharge danger level model; Perform a weighted sum calculation on the weight corresponding to each overcharge danger level model and the overcharge danger level corresponding to each overcharge danger level model to obtain the overcharge danger level corresponding to the target overcharge current and the rechargeable capacity of the target battery, and further obtain the overcharge danger level table.

5. The method according to claim 2 or 4, characterized in that, The preset membership function corresponding to the overcharge current is a linear function or a Gaussian distribution function; the preset membership function corresponding to the battery rechargeable capacity is a linear function or a Gaussian distribution function.

6. A regulating device for charging request current, characterized in that, It includes: An acquisition unit, configured to acquire the current overcharge current of the target power battery and the current rechargeable capacity of the battery during the charging process of the target power battery, where the charging request current requested from the charging pile at the initial moment is the current corresponding to the current rechargeable capacity of the battery; A determination unit, configured to determine, according to the current overcharge current and the current chargeable capacity of the battery, a target overcharge risk level corresponding to the current overcharge current and the current chargeable capacity of the battery in a preset overcharge risk level table, where the overcharge risk level table is a correspondence table of overcharge current, battery chargeable capacity, and overcharge risk level; A calculation unit, configured to calculate an adjusted charging request current according to the target overcharge risk level, the current overcharge current, and the current chargeable capacity of the battery, and request the adjusted charging request current from the charging pile; Wherein, the obtaining unit is further configured to: obtain the current SOC, current SOH, and current ambient temperature of the target power battery; determine the current chargeable capacity of the target power battery based on the current SOC, current SOH, and the current ambient temperature of the target power battery; obtain the current actual charging current output by the charging pile, and calculate the current overcharge current of the target power battery according to the current actual charging current and the current chargeable capacity of the battery; Among them, the calculation unit is further configured to: calculate the adjusted charging request current according to the charging request current calculation formula I2 = I - △I i calculate the adjusted charging request current, where I2 represents the adjusted charging request current, I represents the current chargeable capacity of the battery, and △I i represents the current offset of the i-th time, △I i = △I i-1 + w * I1, △I i-1 represents the current offset of the (i - 1)-th time, w represents the target overcharge hazard level, I1 represents the current overcharge current, and the value of the current offset △I0 of the 0-th time is 0.

7. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 above are implemented.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores machine-executable instructions, and when the machine-executable instructions are called and run by the processor, the machine-executable instructions cause the processor to run the method according to any one of claims 1 to 5 above.

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