Battery charge and discharge depth control method, control system, vehicle and storage medium

Abstract

The present application discloses a control method, control system, automobile and storage medium for the depth of charge and discharge of a battery. The control method for the depth of charge and discharge of a battery includes: obtaining the service life of the battery, determining that the service life is less than a first preset threshold, and updating the charge and discharge depth of the battery according to a preset first charge and discharge depth parameter; determining that the service life is greater than or equal to the first preset threshold; obtaining operating parameters, obtaining a second charge and discharge depth parameter according to the operating parameters and a preset relationship, and updating the charge and discharge depth according to the second charge and discharge depth parameter; determining that the service life is less than the target service life; determining that the change in the service life after updating the charge and discharge depth is greater than or equal to the second preset threshold, and executing again: obtaining operating parameters. The present application can quantify the relationship between the charge and discharge depth and the service life of the battery, so that the service life reaches the target service life by controlling the charge and discharge depth.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a method for controlling the depth of battery charge and discharge, a control system, a vehicle and a storage medium. Background Art

[0002] In the related art, the following three methods are used to extend the battery life in order to control the battery life to reach the target life: first, adopt an active or passive thermal management system to make the battery operate in a suitable temperature range; second, reduce the battery current to avoid overheating, over-potential lithium deposition, etc.; third, avoid deep charging and deep discharging operations on the battery.

[0003] In practical applications, the first and second methods achieve the above effect by setting the battery's operating temperature threshold, current threshold, etc., and the third method achieves the above effect by fitting a semi-empirical or purely numerical formula. However, the fitting formula does not take into account the impact of the battery's internal electrochemical mechanism on the battery's service life, making it difficult to quantify the relationship between the battery's DOD (depth of charge and discharge) and service life. Therefore, the third method cannot accurately control the battery's DOD so that the battery's service life reaches the target service life. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a battery charge and discharge depth control method, control system, automobile and storage medium, which can quantify the relationship between the battery charge and discharge depth and the service life, so as to achieve the target service life by controlling the battery charge and discharge depth.

[0005] According to the first aspect of the present application, a method for controlling the charge and discharge depth of a battery includes: obtaining the service life of the battery, determining that the service life is less than a first preset threshold value, and updating the charge and discharge depth of the battery according to a preset first charge and discharge depth parameter; determining that the service life is greater than or equal to the first preset threshold value; obtaining operating parameters; obtaining a second charge and discharge depth parameter according to the operating parameters and a preset relationship, and updating the charge and discharge depth according to the second charge and discharge depth parameter; determining that the service life is less than a target service life; determining that a change in the service life after updating the charge and discharge depth is greater than or equal to the second preset threshold value, and executing the step of obtaining operating parameters again.

[0006] According to the control method of the battery charge and discharge depth of the embodiment of the present application, there are at least the following beneficial effects: when the service life is less than the first preset threshold, the battery is controlled to operate with the first charge and discharge depth parameter; when the service life is greater than or equal to the first preset threshold, the second charge and discharge depth parameter is calculated based on the operating parameters and the preset relationship, and the battery is controlled to operate with the second charge and discharge depth parameter when the change in the service life is less than the second preset threshold; the battery is controlled to operate with the new charge and discharge depth parameter calculated by the operating parameters and the preset relationship when the change in the service life is greater than or equal to the second preset parameter. That is, the embodiment of the present application divides the target service life into multiple intervals, and calculates the corresponding charge and discharge depth parameters for the interval of the service life, the operating parameters and the preset relationship. Therefore, the embodiment of the present application can quantify the impact of different charge and discharge depths on the battery service life, so that the battery's service life reaches the target service life by controlling the battery's charge and discharge depth.

[0007] According to some embodiments of the present application, the preset relationship includes a first preset relationship, and the operating parameters include accumulated discharge energy; before obtaining the service life of the battery, the battery charge and discharge depth control method also includes: obtaining a first capacity loss of the battery in a storage state, and obtaining a second capacity loss of the battery in a use state according to the preset discharge energy; obtaining the first preset relationship according to the first capacity loss and the second capacity loss; obtaining the second charge and discharge depth parameter according to the operating parameters and the preset relationship includes: obtaining a third charge and discharge depth parameter according to the accumulated discharge energy and the first preset relationship; obtaining a target weight value according to the operating parameters, and obtaining the second charge and discharge depth parameter according to the target weight value and the third charge and discharge depth parameter.

[0008] According to some embodiments of the present application, the preset relationship also includes a second preset relationship, and the operating parameters also include at least one of temperature and charging frequency; obtaining the target weight value based on the operating parameters includes: within a preset time, obtaining at least one of the total time when the temperature is greater than a preset temperature threshold, the total number of times the charging frequency is greater than a first preset charging threshold, and the proportion of the charging frequency less than a second preset charging threshold; reducing or increasing the preset weight value based on at least one of the total time, the total number of times, the proportion, and the second preset relationship to obtain the target weight value.

[0009] According to some embodiments of the present application, the second preset relationship includes at least one of the following: if the total duration is greater than a third preset threshold, the preset weight value is reduced; if the total number of times is greater than a fourth preset threshold, the preset weight value is reduced; if the proportion is greater than a fifth preset threshold, the preset weight value is increased.

[0010] According to some embodiments of the present application, applied to an automobile, the preset relationship also includes a second preset relationship, and the operating parameters also include at least one of the cumulative mileage and the average speed; the obtaining of the target weight value according to the operating parameters also includes: according to at least one of the cumulative mileage, the average speed, and the second preset relationship, the preset weight value is reduced or increased to obtain the target weight value; the second preset relationship also includes at least one of the following: if the ratio of the cumulative mileage to the sixth preset threshold is a positive integer, the preset weight value is reduced; if the average speed is less than the seventh preset threshold, and the proportion of the average speed greater than the seventh preset threshold is less than the eighth preset threshold, the preset weight value is increased.

[0011] According to some embodiments of the present application, the used service life includes at least one of the current mileage traveled and the current driving time.

[0012] The automobile according to the second embodiment of the present application includes: a controller for executing the battery charge and discharge depth control method as described in any of the above embodiments.

[0013] According to the control system of the battery charge and discharge depth of the third embodiment of the present application, it includes: a first module, used to obtain the service life of the battery, determine that the service life is less than a first preset threshold, and update the charge and discharge depth of the battery according to a preset first charge and discharge depth parameter; a second module, used to determine that the service life is greater than or equal to the first preset threshold; a third module, used to obtain operating parameters; obtain a second charge and discharge depth parameter according to the operating parameters and a preset relationship, and update the charge and discharge depth according to the second charge and discharge depth parameter; a fourth module, used to determine that the service life is less than the target service life; determine that the change in the service life after updating the charge and discharge depth is greater than or equal to the second preset threshold, and execute the step of obtaining the operating parameters again.

[0014] According to the fourth aspect of the present application, a control system for the battery charge and discharge depth includes: at least one processor; at least one memory for storing at least one program; when the at least one program is executed by the at least one processor, the at least one processor implements the battery charge and discharge depth control method described in the above embodiment.

[0015] According to the computer-readable storage medium of the fifth aspect embodiment of the present application, processor-executable instructions are stored therein, and the processor-executable instructions, when executed by the processor, are used to implement the battery charge and discharge depth control method described in the above embodiment.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 A flow chart of a method for controlling the charge and discharge depth of a battery according to an embodiment of the present application;

[0019] Figure 2 Another flow chart of the method for controlling the charge and discharge depth of a battery according to an embodiment of the present application;

[0020] Figure 3 Another flow chart of the method for controlling the charge and discharge depth of a battery according to an embodiment of the present application;

[0021] Figure 4 A schematic diagram of a first preset relationship of an embodiment of the present application;

[0022] Figure 5 Another flow chart of the method for controlling the charge and discharge depth of a battery according to an embodiment of the present application;

[0023] Figure 6 A schematic diagram of a control system for battery charge and discharge depth according to an embodiment of the present application.

[0024] Reference numerals:

[0025] The first module 100 , the second module 200 , the third module 300 , and the fourth module 400 . DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0027] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0030] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0031] It should be noted that in the following description, the service life of a battery refers to any one of the time required for the rated capacity of the battery to gradually decay from the factory to a certain threshold, the number of charge and discharge cycles, etc. Therefore, the service life refers to any one of the time the battery has been used in the current state, the number of charge and discharge cycles completed, etc.; the target service life refers to any one of the expected use time, the expected number of charge and discharge cycles, etc.

[0032] When a battery is applied to a product, the battery's service life also indicates the current battery's ability to drive the product to operate normally. For example, in the automotive field, the battery's service life indicates any one of the current mileage of the car, the current driving time of the car, etc. Correspondingly, the target service life indicates the expected ability of the battery to drive the product to operate normally. For example, in the automotive field, the battery's target service life indicates any one of the expected mileage of the car, the expected driving years of the car, etc.

[0033] Take the target service life as the expected mileage of the car as an example. In the relevant technology, if the user's warranty expectation for the mileage of the whole vehicle is 1 million kilometers (that is, the target service life is 1 million kilometers), and the power consumption of the whole vehicle is 15kWh per 100 kilometers, the battery manufacturer will provide the following two battery control methods according to user needs: the first is to control the battery's SOC (State of Charge) in the range of 5% ≤ SOC ≤ 95%, at which time the battery's charge and discharge depth is in a higher charge and discharge depth range; the second is to control the battery's SOC in the range of 10% ≤ SOC ≤ 90%, at which time the battery's charge and discharge depth is in a lower charge and discharge depth range. Among them, although the first method can increase the car's single full charge endurance, it cannot meet the user's target service life expectations; although the second method can meet the user's target service life expectations, it will affect the car's single charge endurance.

[0034] Based on this, the embodiments of the present application provide a battery charge and discharge depth control method, control system, automobile and storage medium, which can quantify the impact of different charge and discharge depths on the battery service life, so that the battery service life reaches the target service life by controlling the battery charge and discharge depth, thereby achieving the user's target service life expectations without affecting the vehicle's single charge endurance.

[0035] Reference Figure 1 , the embodiment of the present application provides a method for controlling the charge and discharge depth of a battery. The method for controlling the charge and discharge depth of a battery comprises the steps of:

[0036] S110, obtaining the service life of the battery, determining that the service life is less than a first preset threshold, and updating the charge and discharge depth of the battery according to a preset first charge and discharge depth parameter;

[0037] S120, determining that the service life is greater than or equal to a first preset threshold;

[0038] S130, obtaining operating parameters; obtaining a second charge and discharge depth parameter according to the operating parameters and a preset relationship, and updating the charge and discharge depth according to the second charge and discharge depth parameter;

[0039] S140, determining that the service life is less than the target service life; determining that the change in the service life after the charge and discharge depth is updated is greater than or equal to a second preset threshold, and executing step S120 again.

[0040] Specifically, the service life of a battery indicates any one of the length of time the battery has been used in its current state, the number of charge and discharge cycles that have been completed, and the like. When a battery is applied to a certain product, the service life of the battery also indicates the ability of the current battery to drive the normal operation of the product, and the like. It is set that before the service life is less than the first preset threshold, the battery is controlled to operate at the maximum allowable DOD (i.e., the first charge and discharge depth parameter), and the operating parameters of the battery and / or the product to which the battery is applied are recorded using tools such as BMS (Battery Management System), cloud platform, etc. The corresponding second charge and discharge depth parameter is obtained based on the operating parameter and the preset relationship, and the second charge and discharge depth parameter is used to control the charge and discharge depth of the battery in the next interval.

[0041] Among them, the target service life is divided into multiple intervals according to the first numerical length between the first preset threshold value and the zero value of the compartment, and / or according to the second numerical length between the second preset threshold value and the zero value. The preset relationship represents the relationship between the charge and discharge depth and the operating parameters calculated in advance by the battery aging mechanism. After calculating the second charge and discharge depth parameter, it is determined whether the service life of the battery has reached the target service life. If not, the battery is controlled to continue to operate using the second charge and discharge depth parameter and the service life is updated. After the charge and discharge depth of the battery is changed to the second charge and discharge depth parameter, it is determined whether the change in the service life is greater than or equal to the second preset threshold, that is, it is determined whether the service life is in another interval. If the change is not greater than the second preset threshold, the battery is controlled to continue to operate with the second charge and discharge depth parameter; if it is determined that the change is greater than or equal to the second preset threshold, a new charge and discharge depth parameter is obtained according to the operating parameters and the preset relationship, and the new charge and discharge depth parameter is used to control the operation of the battery in the interval. Repeat the above operation until the service life of the battery reaches the target service life, that is, until the service life traverses all intervals. It can be understood that the first preset threshold and the second preset threshold may be equal or unequal, and this embodiment of the present application does not specifically limit this.

[0042] For example, the control method of the battery charge and discharge depth is applied to the automotive field, and the service life represents the current mileage of the car. The first preset threshold and the second preset threshold are both set to 10,000 kilometers, that is, every 10,000 kilometers traveled by the car is divided into an interval. Therefore, according to the control method of the battery charge and discharge depth provided in the embodiment of the present application, the charge and discharge depth of the battery will be updated once every 10,000 kilometers traveled by the car. Specifically, when the car travels the initial 10,000 kilometers, the battery is controlled to operate at the maximum allowed DOD (i.e., the first charge and discharge depth parameter). When the current mileage of the car reaches 10,000 kilometers, or is greater than 10,000 kilometers, the second charge and discharge depth parameter is calculated based on the operating parameters and preset relationship of the battery and / or the car. In the next 10,000 kilometers of the car (i.e., the current mileage is between 10,000 kilometers and 20,000 kilometers), the battery is controlled to operate with the second charge and discharge depth parameter. When the current mileage of the car reaches 20,000 kilometers, or more than 20,000 kilometers, the change in the current mileage is greater than or equal to 10,000 kilometers. Therefore, a new charge and discharge depth parameter is calculated based on the operating parameters of the battery and / or the car and the preset relationship, and the new charge and discharge depth parameter is used to control the charge and discharge depth of the battery when the current mileage of the car is between 20,000 kilometers and 30,000 kilometers. Repeat the above operation to update the charge and discharge depth of the car every 10,000 kilometers until the current mileage of the car reaches the target service life, thereby achieving the control of the battery life to reach the target service life without affecting the single charge endurance.

[0043] The method for controlling the charge and discharge depth of a battery provided in the embodiment of the present application controls the battery to operate with a first charge and discharge depth parameter when the service life is less than a first preset threshold value; when the service life is greater than or equal to the first preset threshold value, the second charge and discharge depth parameter is calculated based on the operating parameters and the preset relationship, and the battery is controlled to operate with the second charge and discharge depth parameter when the change in the service life is less than the second preset threshold value; the battery is controlled to operate with a new charge and discharge depth parameter calculated based on the operating parameters and the preset relationship when the change in the service life is greater than or equal to the second preset parameter. That is, the embodiment of the present application divides the target service life into multiple intervals, and calculates the corresponding charge and discharge depth parameters for the interval in which the service life is located, the operating parameters, and the preset relationship. Therefore, the embodiment of the present application can quantify the impact of different charge and discharge depths on the battery service life, so that the battery's service life reaches the target service life by controlling the charge and discharge depth of the battery.

[0044] Reference Figure 2 and Figure 3 In some embodiments, the preset relationship includes a first preset relationship, and the operating parameter includes a cumulative discharge energy.

[0045] Before step S110, the method for controlling the charge and discharge depth of a battery provided in the embodiment of the present application further includes the following steps:

[0046] S210, obtaining a first capacity loss of the battery in a storage state, and obtaining a second capacity loss of the battery in a use state according to a preset discharge energy;

[0047] S220: Obtain a first preset relationship according to the first capacity loss and the second capacity loss.

[0048] In step S130, "obtaining a second charge-discharge depth parameter according to the operating parameter and the preset relationship" includes sub-steps:

[0049] S310, obtaining a third charge-discharge depth parameter according to the accumulated discharge energy and the first preset relationship;

[0050] S320: Obtain a target weight value according to the operating parameter, and obtain a second charge and discharge depth parameter according to the target weight value and the third charge and discharge depth parameter.

[0051] Specifically, the causes of battery aging include calendar aging and cycle aging, that is, the slow aging caused by the battery being in a static state and the aging caused by the battery charging and discharging. Among them, calendar aging is caused by the thickening of the solid electrolyte interface film during the storage process of the battery; cycle aging is caused by the continuous rupture and reconstruction of the electrolyte interface film during the battery charging and discharging process. Therefore, according to the experiment, the first capacity loss Q1 shown in the following formula (1) and the second capacity loss Q2 shown in the following formula (2) can be obtained.

[0052] Q1=t gamma ............Formula (1)

[0053]

[0054] Where t represents the battery test duration, gamma, a, and k are constants, and n represents the theoretical cumulative discharge energy (i.e., the preset discharge energy) when the battery reaches the target service life. The first capacity loss Q1 and the second capacity loss Q2 are superimposed and calculated (as shown in formula (3)) to obtain the total capacity loss Q loss , thus according to the total capacity loss Q loss The charge / discharge depth DOD of the battery is obtained by combining the rated capacity of the battery, and then the relationship between different charge / discharge depths DOD and the accumulated discharge energy is obtained (i.e., the first preset relationship, such as Figure 4 Therefore, the accumulated discharge energy obtained according to the above steps is brought into Figure 4In the first preset relationship shown, the corresponding third charge and discharge depth parameter can be obtained. According to other operating parameters and preset fuzzy rules, the target weight value is obtained, and the third charge and discharge depth parameter is weighted summed according to the target weight value to obtain the second charge and discharge depth parameter. According to the second charge and discharge depth parameter, the charge and discharge depth of the battery in the corresponding interval is controlled, thereby quantifying the relationship between the battery charge and discharge depth and the battery service life. It can be understood that the total capacity loss Q shown in formula (3) loss The calculation is only for example, the total capacity loss Q loss The calculation method can also be adaptively adjusted according to actual needs.

[0055] Reference Figure 5 In some embodiments, the preset relationship further includes a second preset relationship, and the operating parameter further includes at least one of temperature and charging frequency.

[0056] In step S320, "obtaining a target weight value according to operating parameters" includes sub-steps:

[0057] S510, within a preset time, obtaining at least one of the total duration of the temperature being greater than a preset temperature threshold, the total number of times the charging frequency is greater than a first preset charging threshold, and the proportion of the charging frequency being less than a second preset charging threshold;

[0058] S520: According to at least one of the total duration, the total number of times, and the proportion, and a second preset relationship, the preset weight value is reduced or increased to obtain a target weight value.

[0059] Specifically, the preset weight value is dynamically adjusted using the fuzzy rule (i.e., the second preset relationship) to obtain the target weight value. The fuzzy rule includes at least one of the following:

[0060] If the total duration is greater than a third preset threshold, the preset weight value is reduced;

[0061] If the total number of times is greater than a fourth preset threshold, the preset weight value is reduced;

[0062] If the proportion is greater than the fifth preset threshold, the preset weight value is increased.

[0063] Take the preset time as "year", the preset temperature threshold as 35°C, the third preset threshold as two months, the fourth preset threshold as 540 times, and the fifth preset threshold as 50% as an example. When the total time that the annual operating temperature of the battery exceeds 35°C is greater than two months, the preset weight value is reduced; when the total number of times the annual charging frequency of the battery is fast charging (that is, the charging frequency is greater than the first preset charging threshold) is greater than 540 times, the preset weight value is reduced; when the annual charging frequency of the battery is slow charging (that is, the charging frequency is less than the second preset charging threshold) The proportion of the total number of charging times is greater than 50%, the preset weight value is increased. It can be understood that the specific values ​​of the preset temperature threshold, the first preset charging threshold, the second preset charging threshold, the third preset threshold, the fourth preset threshold, and the fifth preset threshold can also be adaptively adjusted according to actual conditions, and the embodiments of the present application are not specifically limited.

[0064] Among them, the following formula (4) is taken as an example to illustrate the determination of the second charge and discharge depth parameter DOD2. In formula (4), DOD3 represents the third charge and discharge depth parameter, and b represents the preset weight value. Therefore, the reduction operation represents the reduction of the value of the preset weight value, and the increase operation represents the increase of the value of the preset weight value. For example, the preset weight value is set to 1, and the value of the preset weight value is reduced by 0.1 for each reduction operation; and the value of the preset weight value is increased by 0.1 for each increase operation. It can be understood that the specific reduction value and increase value of the preset weight value can be adaptively set according to the actual situation, and the reduction value and increase value can be equal or unequal, the reduction value of each reduction operation can be equal or unequal, and the increase value of each increase operation can be equal or unequal. It can be understood that the determination of the second charge and discharge depth parameter DOD2 shown in formula (4) is only exemplary, and the determination of the second charge and discharge depth parameter DOD2 can also be adaptively adjusted according to actual needs.

[0065] DOD2=b·DOD3............Formula (4)

[0066] In some embodiments, when the above-mentioned method for controlling the depth of charge and discharge of a battery is applied to the automotive field, the operating parameters described in the above-mentioned control method also include at least one of the accumulated mileage and the average speed.

[0067] Correspondingly, in step S320, "obtaining a target weight value according to operating parameters" also includes a sub-step: reducing or increasing the preset weight value according to at least one of the accumulated mileage, the average speed, and a second preset relationship to obtain the target weight value.

[0068] Specifically, the preset weight value is dynamically adjusted using the fuzzy rule (i.e., the second preset relationship) to obtain the target weight value. The fuzzy rule also includes at least one of the following:

[0069] If the ratio of the accumulated mileage to the sixth preset threshold is a positive integer, the preset weight value is reduced;

[0070] If the average speed is less than the seventh preset threshold, and the proportion of the average speed greater than the seventh preset threshold is less than the eighth preset threshold, the preset weight value is increased.

[0071] Take the sixth preset threshold of 10,000 kilometers, the seventh preset threshold of 60, and the eighth preset threshold of 10% as an example. When the cumulative mileage of the car is a multiple of 10,000 kilometers, that is, when the cumulative mileage increases by 10,000 kilometers, the preset weight value is reduced; when the annual average speed of the car is less than 60km / h, and the proportion of less than 60km / h is less than 10%, the preset weight value is increased. It can be understood that the specific values ​​of the sixth preset threshold, the seventh preset threshold, and the eighth preset threshold can also be adaptively adjusted according to actual conditions, and the embodiments of the present application are not specifically limited. The specific meanings of the reduction operation and the increase operation are the same as those described in the above embodiments, and the embodiments of the present application will not be repeated.

[0072] In some embodiments, when the method for controlling the battery charge and discharge depth of the above embodiment is applied to an automobile, the service life described in the above embodiment includes at least one of the current mileage and the current driving time.

[0073] Specifically, take the current mileage as the service life as an example. The current mileage of the car is obtained. When the current mileage of the car is less than 10,000 kilometers, the battery is controlled to operate with the first charge and discharge depth parameter. When the current mileage of the car is greater than or equal to 10,000 kilometers, the cumulative discharge energy recorded by tools such as BMS and cloud platform is substituted into the first preset relationship to obtain the third charge and discharge depth parameter. According to other operating parameters (including temperature, charging frequency, cumulative mileage, average speed) and the second preset relationship, the target weight value is obtained, and the second charge and discharge depth parameter is obtained according to the target weight value, the first charge and discharge depth parameter, and the third charge and discharge depth parameter, so that when the current mileage of the car is between 10,000 kilometers and 20,000 kilometers, the battery is controlled to operate with the second charge and discharge depth parameter. Repeat the above operation, when the current mileage of the car increases by 10,000 kilometers (that is, the second preset threshold is set to 10,000 kilometers), a new charge and discharge depth parameter is obtained according to the operating parameters, the first preset relationship, and the second preset relationship, so as to control the battery to operate with the new charge and discharge depth parameter until the current mileage of the car reaches the target service life.

[0074] The embodiment of the present application also provides a car. The car includes a controller, and the controller is used to execute the control method of battery charge and discharge depth as described in any of the above embodiments. It can be understood that the car can be a pure electric vehicle, a hybrid electric vehicle, etc., which is not specifically limited in the embodiment of the present application.

[0075] Reference Figure 6 The embodiment of the present application also provides a control system for battery charge and discharge depth, including:

[0076] The first module 100 is used to obtain the service life of the battery, determine that the service life is less than a first preset threshold, and update the charge and discharge depth of the battery according to a preset first charge and discharge depth parameter.

[0077] The second module 200 is used to determine that the service life is greater than or equal to a first preset threshold;

[0078] The third module 300 is used to obtain an operating parameter, obtain a second charge and discharge depth parameter according to the operating parameter and a preset relationship, and update the charge and discharge depth according to the second charge and discharge depth parameter;

[0079] The fourth module 400 is used to determine that the service life is less than the target service life; determine that the change in the service life after the charge and discharge depth is updated is greater than or equal to the second preset threshold, and execute the step again: obtain the operating parameters.

[0080] It can be seen that the contents of the above-mentioned battery charge and discharge depth control method embodiment are all applicable to the embodiment of the battery charge and discharge depth control system. The functions specifically implemented by the battery charge and discharge depth control system embodiment are the same as those in the above-mentioned battery charge and discharge depth control method embodiment, and the beneficial effects achieved are also the same as those achieved by the above-mentioned battery charge and discharge depth control method embodiment.

[0081] The embodiment of the present application also provides another battery charge and discharge depth control system, which includes: at least one processor, and a memory connected to the at least one processor. The memory stores instructions, and the instructions are executed by the at least one processor, so that when the at least one processor executes the instructions, the battery charge and discharge depth control method described in any of the above embodiments is implemented.

[0082] An embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the method for controlling the depth of charge and discharge of a battery as described in any of the above embodiments.

[0083] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0084] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0085] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A method for controlling battery charge and discharge depth, characterized in that: include: Obtaining the service life of the battery, and determining whether the service life is less than a first preset threshold, and if so, executing the following steps: updating the charge and discharge depth of the battery according to a preset first charge and discharge depth parameter; Otherwise, the following steps are executed repeatedly until the service life reaches the target service life: Obtaining parameter step: obtaining operating parameters, obtaining a second charge and discharge depth parameter according to the operating parameters and a preset relationship; updating the charge and discharge depth according to the second charge and discharge depth parameter; Determine whether the change in the service life after updating the charge and discharge depth is greater than or equal to a second preset threshold, and if so, return to the parameter acquisition step; otherwise, control the battery to continue to operate with the second charge and discharge depth parameter; Wherein, the preset relationship includes a first preset relationship, and the operating parameter includes accumulated discharge energy; Before obtaining the service life of the battery, the method for controlling the battery charge and discharge depth further includes: Acquire a first capacity loss of the battery in a storage state, and acquire a second capacity loss of the battery in a use state; wherein the first capacity loss refers to calendar aging loss; The first preset relationship is obtained according to the first capacity loss, the second capacity loss and the rated capacity of the battery; wherein the first preset relationship refers to the relationship between different charge and discharge depths and the accumulated discharge energy; The obtaining of the second charge-discharge depth parameter according to the operating parameter and the preset relationship includes: Obtaining a third charge-discharge depth parameter according to the accumulated discharge energy and the first preset relationship; The operating parameters also include at least one of temperature, charging frequency, cumulative mileage, and average speed. The target weight value is obtained based on at least one of temperature, charging frequency, cumulative mileage, and average speed. The second charge and discharge depth parameter is obtained based on the target weight value and the third charge and discharge depth parameter.

2. The method for controlling the battery charge and discharge depth according to claim 1, characterized in that: The preset relationship further includes a second preset relationship, and the operating parameter includes at least one of temperature and charging frequency; The obtaining of the target weight value according to the operating parameter comprises: Within a preset time, obtaining at least one of the total duration of the temperature being greater than a preset temperature threshold, the total number of times the charging frequency is greater than a first preset charging threshold, and the proportion of the charging frequency being less than a second preset charging threshold; The preset weight value is reduced or increased according to at least one of the total duration, the total number of times, the proportion, and the second preset relationship to obtain the target weight value.

3. The method for controlling the battery charge and discharge depth according to claim 2, characterized in that: The second preset relationship includes at least one of the following: If the total duration is greater than a third preset threshold, the preset weight value is reduced; If the total number of times is greater than a fourth preset threshold, the preset weight value is reduced; If the proportion is greater than a fifth preset threshold, the preset weight value is increased.

4. The method for controlling the battery charge and discharge depth according to any one of claims 1 to 3, applied to an automobile, characterized in that: The preset relationship further includes a second preset relationship, wherein the operating parameter includes at least one of cumulative mileage and average speed; The obtaining of the target weight value according to the operating parameter further includes: According to at least one of the accumulated mileage, the average speed, and a second preset relationship, a preset weight value is reduced or increased to obtain a target weight value; The second preset relationship also includes at least one of the following: If the ratio of the accumulated mileage to the sixth preset threshold is a positive integer, the preset weight value is reduced; If the average speed is less than a seventh preset threshold, and the proportion of the average speed less than the seventh preset threshold is less than an eighth preset threshold, the preset weight value is increased.

5. The method for controlling the battery charge and discharge depth according to claim 4, characterized in that: The used life includes at least one of the current travelled mileage and the current travelled time.

6. Automobile, characterized in that include: A controller, used to execute the method for controlling the charge and discharge depth of a battery as claimed in any one of claims 1 to 5.

7. A control system for battery charge and discharge depth, characterized in that: include: The first module is used to obtain the service life of the battery, determine whether the service life is less than a first preset threshold, and if so, perform the following steps: update the charge and discharge depth of the battery according to a preset first charge and discharge depth parameter; Otherwise, the following steps are executed repeatedly until the service life reaches the target service life: The third module is used to execute the parameter acquisition step: acquiring an operating parameter; obtaining a second charge and discharge depth parameter according to the operating parameter and a preset relationship, and updating the charge and discharge depth according to the second charge and discharge depth parameter; The fourth module is used to determine whether the change in the service life after the charge and discharge depth is updated is greater than or equal to a second preset threshold value, and if so, return to the third module to execute the parameter acquisition step; otherwise, control the battery to continue to operate with the second charge and discharge depth parameter; Wherein, the preset relationship includes a first preset relationship, and the operating parameter includes accumulated discharge energy; Before obtaining the service life of the battery, the method for controlling the battery charge and discharge depth further includes: Acquire a first capacity loss of the battery in a storage state, and acquire a second capacity loss of the battery in a use state; wherein the first capacity loss refers to calendar aging loss; The first preset relationship is obtained according to the first capacity loss, the second capacity loss and the rated capacity of the battery; wherein the first preset relationship refers to the relationship between different charge and discharge depths and the accumulated discharge energy; The obtaining of the second charge-discharge depth parameter according to the operating parameter and the preset relationship includes: Obtaining a third charge-discharge depth parameter according to the accumulated discharge energy and the first preset relationship; The operating parameters also include at least one of temperature, charging frequency, cumulative mileage, and average speed. The target weight value is obtained based on at least one of temperature, charging frequency, cumulative mileage, and average speed. The second charge and discharge depth parameter is obtained based on the target weight value and the third charge and discharge depth parameter.

8. A control system for battery charge and discharge depth, characterized in that: include: at least one processor; at least one memory for storing at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements the method for controlling the charge and discharge depth of a battery as described in any one of claims 1 to 5.

9. A computer-readable storage medium having processor-executable instructions stored therein, characterized in that: The processor-executable instructions are used to implement the method for controlling the charge and discharge depth of a battery as claimed in any one of claims 1 to 5 when executed by the processor.

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