Method, device and vehicle for determining remaining charging time

Abstract

This application discloses a method, device, and vehicle for determining the remaining charging time. The method, applied to a controller, includes: obtaining the actual maximum charging output capacity (CML) of a charging pile during battery charging, and using the actual CML as a first CML; and determining the remaining charging time of the battery based on the first CML. This solution utilizes the actual maximum charging output capacity (CML) of the charging pile to determine the remaining charging time, avoiding the problem of inaccurate remaining charging time caused by using the value reported by the charging pile to determine the remaining charging time.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of automobile technology, and more particularly to a method and device for determining remaining charging time, and an automobile. Background Art

[0002] With the rapid development of automotive technology, accurate remaining battery charging time is becoming increasingly important to car owners.

[0003] In the prior art, the remaining charging time of a battery is mostly determined using the value reported by the charging pile. However, using the prior art to determine the remaining charging time of a battery may result in inaccurate remaining charging time of the battery. Summary of the Invention

[0004] Embodiments of the present application provide a method, device, and vehicle for determining the remaining charging time, to solve the problem of inaccurate remaining charging time of a battery determined in the prior art.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a method for determining a remaining charging time, the method being applied to a controller and comprising:

[0007] When the battery is charging, the actual maximum charging output capacity (Charger MaximumLab, CML) of the charging pile is obtained, and the actual CML is used as the first CML;

[0008] The remaining charging time of the battery is determined according to the first CML.

[0009] Optionally, the method further includes:

[0010] When a first preset condition is met, updating the remaining charging time of the battery according to a first method; and / or,

[0011] When a second preset condition is met, the remaining charging time of the battery is updated according to a second method.

[0012] Optionally, the first preset condition includes:

[0013] The second CML is less than or equal to the product of the charging current request sent by the controller and the first preset parameter;

[0014] The difference between the second CML and the actual charging current collected by the controller is less than or equal to the first preset current value;

[0015] The second CML lasts for a first preset time value.

[0016] Optionally, updating the remaining charging time of the battery according to the first method includes:

[0017] Obtaining a first average CML of actual CMLs within a second preset time value;

[0018] Wherein, the actual CML within the second preset time satisfies the first preset condition, and the second preset time value is less than or equal to the first preset time value;

[0019] The remaining charging time of the battery is updated according to the first average CML.

[0020] Optionally, the second preset condition includes:

[0021] The third CML is greater than the product of the first average CML and the second preset parameter;

[0022] The third CML lasts for a third preset time value;

[0023] The first average CML is an average value of actual CML within a second preset time value, and the actual CML within the second preset time satisfies the first preset condition.

[0024] Optionally, updating the remaining charging time of the battery according to the second method includes:

[0025] Obtain a second average CML of the actual CML within a fourth preset time value;

[0026] The actual CML within the fourth preset time satisfies the second preset condition, and the fourth preset time value is less than or equal to the third preset time value;

[0027] The remaining charging time of the battery is updated according to the second average CML.

[0028] Optionally, the remaining charging time of the battery is determined as follows:

[0029] obtaining a heating cutoff temperature threshold of the battery, an initial minimum temperature of the battery, and a maximum available capacity of the battery;

[0030] According to the target CML, the battery state of charge (SOC) of the charging stage corresponding to the current moment, the starting battery SOC of the charging stage corresponding to the current moment, the average temperature rise rate of the battery heating in the charging stage corresponding to the current moment, and the average charging current of the battery in the charging stage corresponding to the current moment are obtained;

[0031] determining the remaining charging time of the battery based on the battery heating cut-off temperature threshold, the initial minimum temperature of the battery, the maximum available capacity of the battery, the target CML, the battery SOC of the charging stage corresponding to the current moment, the starting battery SOC of the charging stage corresponding to the current moment, the average temperature rise rate of the battery heating in the charging stage corresponding to the current moment, and the average charging current of the battery in the charging stage corresponding to the current moment;

[0032] The target CML includes the first CML, the first average CML, or the second average CML.

[0033] Optionally, the method further includes:

[0034] In a case where the difference between the remaining charging time before the battery is updated and the remaining charging time after the update is greater than a fifth time value, a notification message is sent.

[0035] In a second aspect, an embodiment of the present application provides a device for determining a remaining charging time, the device being applied to a controller, including:

[0036] An acquisition module, configured to acquire the actual maximum charging output capacity CML of the charging pile when the battery is being charged, and use the actual CML as the first CML;

[0037] A determination module is configured to determine the remaining charging time of the battery according to the first CML.

[0038] In a third aspect, an embodiment of the present application provides a car, comprising a device for determining the remaining charging time as described in the second aspect.

[0039] The beneficial effects of the embodiments of the present application are:

[0040] In the above scheme, since a technical scheme of obtaining the actual maximum charging output capacity CML of the charging pile as the first CML and determining the remaining charging time of the battery based on the first CML is adopted, the problem of inaccurate remaining charging time of the battery caused by the existing technology using the numerical value reported by the charging pile for determination is avoided, thereby providing accurate remaining charging time of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0042] Figure 1This is a flow chart of a method for determining the remaining charging time provided in an embodiment of the present application;

[0043] Figure 2 This is a second flow chart of a method for determining the remaining charging time provided in an embodiment of the present application;

[0044] Figure 3 A schematic diagram of the structure of a device for determining the remaining charging time provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0047] like Figure 1 As shown, an embodiment of the present application provides a method for determining the remaining charging time, which is applied to a controller and includes:

[0048] Step 11: When the battery is charging, obtain the actual CML of the charging pile and use the actual CML as the first CML;

[0049] Step 12: Determine the remaining charging time of the battery according to the first CML.

[0050] In an embodiment of the present application, when the battery is charging, the electric vehicle's controller communicates with the charging station via the Controller Area Network (CAN) bus. The controller obtains the actual maximum charging capacity (CML) of the charging station, i.e., the actual output current of the charging station is sent by the charging station, and the actual CML is used as the first CML. Based on the first CML, the remaining charging time of the battery is determined. In this case, the remaining charging time of the battery is determined according to the following steps:

[0051] Step 23a, obtaining a heating cutoff temperature threshold of the battery, an initial minimum temperature of the battery, and a maximum available capacity of the battery;

[0052] Step 24a: Obtain, based on the first CML, the battery SOC of the current charging stage, the starting battery SOC of the current charging stage, the average battery heating temperature rise rate of the current charging stage, and the average battery charging current of the current charging stage.

[0053] Step 25a: Determine the remaining charging time of the battery by using the calculation formula (1) for the remaining charging time t of the battery based on the heating cut-off temperature threshold of the battery, the initial minimum temperature of the battery, the maximum available capacity of the battery, the first CML, the battery SOC of the charging stage corresponding to the current moment, the starting battery SOC of the charging stage corresponding to the current moment, the average temperature rise rate of the battery heating in the charging stage corresponding to the current moment, and the average charging current of the battery in the charging stage corresponding to the current moment.

[0054] The heating cut-off temperature threshold of the battery, the initial minimum temperature of the battery, and the maximum available capacity of the battery are obtained through actual measurement by the controller, and the current moment is the moment when the first CML is obtained.

[0055] The calculation formula for the remaining charging time t of the battery can be:

[0056] t=(T s -T0) / V Tavg +∑{[SOC (i+1) -SOC i ]*C / I avg} (1)

[0057] Among them, T s is the battery heating cut-off temperature threshold; T0 is the battery heating cut-off temperature threshold; V Tavg The average temperature rise rate of the battery during the charging phase corresponding to the current moment; SOC(i+1) The battery SOC corresponding to the current charging stage; SOC i is the starting battery SOC of the charging stage corresponding to the current moment; the starting value of i is greater than or equal to 1; C is the maximum available capacity of the battery; I avg is the average charging current of the battery in the charging stage corresponding to the current moment.

[0058] SOC i , SOC (i+1) 、V Tavg , I avg There is a mapping relationship between the actual maximum charging output capacity CML of the charging pile and the actual maximum charging output capacity CML of the charging pile. It is affected by the actual maximum charging output capacity CML of the charging pile and varies according to the capacity of the charging pile. Therefore, according to the first CML obtained, the SOC i , SOC (i+1) 、V Tavg , I avg The mapping relationship between the actual maximum charging output capacity CML of the charging pile can obtain the SOC corresponding to the first CML. i , SOC (i+1) 、V Tavg , I avg .

[0059] Since the technical solution of obtaining the actual maximum charging output capacity CML of the charging pile as the first CML and determining the remaining charging time of the battery based on the first CML is adopted, the problem of inaccurate remaining charging time of the battery caused by the use of the numerical value reported by the charging pile for determination in the prior art is avoided, thereby providing accurate remaining charging time of the battery.

[0060] In an optional embodiment of the present application, the method further includes:

[0061] Step 21, when a first preset condition is met, updating the remaining charging time of the battery according to a first method; and / or,

[0062] Step 22: When a second preset condition is met, update the remaining charging time of the battery according to a second method.

[0063] In the embodiments of the present application, it is necessary to determine whether a preset condition is met. If a first preset condition is met, the remaining battery charge time is updated according to a first method; and / or if a second preset condition is met, the remaining battery charge time is updated according to a second method. Due to the adoption of a technical solution of updating the remaining battery charge time in different methods when different preset conditions are met, an accurate remaining battery charge time can be provided.

[0064] In an optional embodiment of the present application, the first preset condition includes:

[0065] The second CML is less than or equal to the product of the charging current request sent by the controller and the first preset parameter;

[0066] The difference between the second CML and the actual charging current collected by the controller is less than or equal to the first preset current value;

[0067] The second CML lasts for a first preset time value.

[0068] In an embodiment of the present application, when a charging pile fails, or the charging capacity parameters of the charging pile do not match, or multiple charging piles are splitting their charging, the actual maximum charging output capacity CML of the charging pile may be smaller than the charging capacity reported by the charging pile. At this time, it can be determined whether the above-mentioned first preset condition is met. If so, the remaining charging time of the battery can be updated. Otherwise, the remaining charging time of the battery will not be updated.

[0069] Among them, the second CML can be the first CML, or the second CML can also be the actual CML obtained again after obtaining the first CML. The first preset parameter is used to determine the deviation ratio between the second CML and the charging current request current, and the first preset parameter is less than 1. In order to avoid frequent floating changes in the second CML and the frequent changes in the remaining charging time of the battery, the first preset parameter can be 0.8. The first preset current value is the calibration deviation current between the second CML and the actual charging current collected by the controller. The selection of the first preset current value can take into account the current required for actual consumption of other accessories of the vehicle. The range of the first preset current value can be 30-50A. The first preset time value is the duration value of the situation where the second CML is less than the charging capacity of the reported charging pile. The selection of the first preset time value can comprehensively balance the consideration of whether the remaining charging time of the battery does not change for a long time or changes frequently. The first preset time value can be 3 minutes.

[0070] In an optional embodiment of the present application, updating the remaining charging time of the battery according to the first method includes:

[0071] Step 21a, obtaining a first average CML of actual CMLs within a second preset time value; wherein the actual CML within the second preset time value satisfies the first preset condition, and the second preset time value is less than or equal to the first preset time value;

[0072] Step 21b: Update the remaining charging time of the battery according to the first average CML.

[0073] In an embodiment of the present application, when a first preset condition is satisfied, a first average CML of the actual CML within a second preset time value is obtained; wherein the actual CML within the second preset time satisfies the first preset condition, and the second preset time value is less than or equal to the first preset time value; the remaining charge time of the battery is updated based on the first average CML; the second preset time value may be 1 minute. When the remaining charge time of the battery is updated based on the first average CML using the calculation formula (1) for the remaining charge time t of the battery, the remaining charge time of the battery is updated according to the following steps:

[0074] Step 23b, obtaining a heating cut-off temperature threshold of the battery, an initial minimum temperature of the battery, and a maximum available capacity of the battery;

[0075] Step 24b: Obtain, based on the first average CML, the battery SOC of the charging stage corresponding to the current moment, the starting battery SOC of the charging stage corresponding to the current moment, the average temperature rise rate of the battery heating in the charging stage corresponding to the current moment, and the average charging current of the battery in the charging stage corresponding to the current moment;

[0076] Step 25b, determining the remaining charging time of the battery by using the calculation formula (1) for the remaining charging time t of the battery based on the heating cutoff temperature threshold of the battery, the initial minimum temperature of the battery, the maximum available capacity of the battery, the first average CML, the battery SOC of the charging stage corresponding to the current moment, the starting battery SOC of the charging stage corresponding to the current moment, the average temperature rise rate of the battery heating in the charging stage corresponding to the current moment, and the average charging current of the battery in the charging stage corresponding to the current moment; wherein the heating cutoff temperature threshold of the battery, the initial minimum temperature of the battery, and the maximum available capacity of the battery are obtained through actual measurements of the controller, the current moment is the moment when the first average CML is obtained, and the first average CML is the average value of the actual CML within the second preset time value.

[0077] As mentioned earlier, SOC i , SOC (i+1) 、V Tavg , I avg There is a mapping relationship between the actual maximum charging output capacity CML of the charging pile and the actual maximum charging output capacity CML of the charging pile. It is affected by the actual maximum charging output capacity CML of the charging pile and varies according to the capacity of the charging pile. Therefore, according to the first average CML obtained, the SOC i , SOC (i+1) 、V Tavg , I avgThe mapping relationship between the actual maximum charging output capacity CML of the charging pile can obtain the SOC corresponding to the first average CML. i , SOC (i+1) 、V Tavg , I avg .

[0078] In an optional embodiment of the present application, the second preset condition includes:

[0079] The third CML is greater than the product of the first average CML and the second preset parameter;

[0080] The third CML lasts for a third preset time value; wherein the first average CML is the average value of the actual CML within the second preset time value, and the actual CML within the second preset time meets the first preset condition.

[0081] In an embodiment of the present application, when the charging pile fault is recovered, or the charging capacity of the charging pile is improved, or the charging pile cancels the diversion charging, the actual maximum charging output capacity CML of the charging pile will increase. At this time, it can be determined whether the above-mentioned second preset condition is met. If it is met, the remaining charging time of the battery can be updated. Otherwise, the remaining charging time of the battery will not be updated.

[0082] Among them, the first average CML is the average value of the actual CML within the aforementioned second preset time value; the third CML can be the second CML or the first CML, or the third CML can also be the actual CML obtained again after obtaining the second CML or the first CML; the second preset parameter is used to determine the improvement and recovery ratio of the third CML to the first average CML, and the second preset parameter is greater than 1. To avoid frequent changes in the remaining charging time of the battery due to frequent fluctuations in the actual output current of the charging pile, the second preset parameter can be 1.2. The third preset time value is the duration value of the situation where the third CML is greater than the first average CML. The selection of the third preset time value can comprehensively balance the consideration of whether the remaining charging time of the battery does not change for a long time or changes frequently. The third preset time value can be 3 minutes.

[0083] In an optional embodiment of the present application, updating the remaining charging time of the battery according to the second method includes:

[0084] Step 22a, obtaining a second average CML of the actual CML within a fourth preset time value; wherein the actual CML within the fourth preset time value satisfies the second preset condition, and the fourth preset time value is less than or equal to the third preset time value;

[0085] Step 22b: Update the remaining charging time of the battery according to the second average CML.

[0086] In an embodiment of the present application, when a second preset condition is satisfied, a second average CML of the actual CML within a fourth preset time value is obtained; wherein the actual CML within the fourth preset time satisfies the second preset condition, and the fourth preset time value is less than or equal to the third preset time value; the remaining charging time of the battery is updated based on the second average CML; the fourth preset time value in minutes may be 1 minute. When the remaining charging time of the battery is updated based on the second average CML using the calculation formula (1) for the remaining charging time t of the battery, the remaining charging time of the battery is updated according to the following steps:

[0087] Step 23c, obtaining a heating cutoff temperature threshold of the battery, an initial minimum temperature of the battery, and a maximum available capacity of the battery;

[0088] Step 24c: Obtain, based on the second average CML, the battery SOC of the charging stage corresponding to the current moment, the starting battery SOC of the charging stage corresponding to the current moment, the average temperature rise rate of the battery heating in the charging stage corresponding to the current moment, and the average charging current of the battery in the charging stage corresponding to the current moment;

[0089] Step 25c, determining the remaining charging time of the battery by using the calculation formula (1) for the remaining charging time t of the battery based on the heating cutoff temperature threshold of the battery, the initial minimum temperature of the battery, the maximum available capacity of the battery, the second average CML, the battery SOC of the charging stage corresponding to the current moment, the starting battery SOC of the charging stage corresponding to the current moment, the average temperature rise rate of the battery heating in the charging stage corresponding to the current moment, and the average charging current of the battery in the charging stage corresponding to the current moment; wherein the heating cutoff temperature threshold of the battery, the initial minimum temperature of the battery, and the maximum available capacity of the battery are obtained through actual measurements of the controller, the current moment is the moment when the second average CML is obtained, and the second average CML is the average value of the actual CML within a fourth preset time value.

[0090] As mentioned earlier, SOC i , SOC (i+1) 、V Tavg , I avg There is a mapping relationship between the actual maximum charging output capacity CML of the charging pile and the actual maximum charging output capacity CML of the charging pile. It is affected by the actual maximum charging output capacity CML of the charging pile and varies according to the capacity of the charging pile. Therefore, according to the obtained second average CML, the SOC i , SOC (i+1) 、V Tavg , I avgThe mapping relationship between the actual maximum charging output capacity CML of the charging pile can obtain the SOC corresponding to the second average CML. i , SOC (i+1) 、V Tavg , I avg .

[0091] In an optional embodiment of the present application, the method further includes:

[0092] Step 31: Send a notification message when the difference between the remaining charging time before the battery is updated and the remaining charging time after the update is greater than a fifth time value.

[0093] In an embodiment of the present application, after updating the remaining charge time of the battery, a determination can be made as to whether the difference between the remaining charge time before and after the update is greater than a fifth time value. If so, a notification message notifying the vehicle owner of the change in remaining charge time is sent to the vehicle owner, the vehicle instrument panel, the central control system, and the mobile phone app. The fifth preset time value is used to compare the difference between the remaining charge time before and after the update to determine whether the vehicle owner needs to be notified of the remaining charge time after the update. If the difference between the remaining charge time before and after the update is less than or equal to the fifth preset time value, the vehicle owner may not be notified. To avoid frequent notifications to the vehicle owner due to changes in charging pile capacity, the fifth preset time value can be 20 minutes. By determining whether the difference between the remaining charge time before and after the update is greater than the fifth time value and then deciding whether to send a notification message to the vehicle owner, the problem of frequent notifications to the vehicle owner due to frequent changes in charging pile capacity is avoided.

[0094] See also Figure 2 , Figure 2 This is a second flow chart of the battery charging method provided in an embodiment of the present application.

[0095] like Figure 2 As shown, the embodiments of the present application may include:

[0096] Step 201: The charging pile starts charging the battery;

[0097] Step 202: Obtain the actual maximum charging output capacity CML of the charging pile, and use the actual CML as the first CML;

[0098] Step 203: Determine the remaining charging time of the battery according to the first CML. The method for determining the remaining charging time of the battery according to the first CML may refer to the description of the above embodiment.

[0099] Step 204: Determine the second CML. If the second CML is less than or equal to the product of the charging current request sent by the controller and the first preset parameter, the difference between the second CML and the actual charging current collected by the controller is less than or equal to the first preset current value, and the second CML lasts for a first preset time, then execute step 205. If not, execute step 210.

[0100] Step 205: Obtain a first average CML of the actual CML within a second preset time value; update the remaining charging time of the battery based on the first average CML; and send a notification message if the difference between the remaining charging time of the battery before the update and the remaining charging time after the update is greater than a fifth preset time value. The method for determining the remaining charging time of the battery based on the first average CML can refer to the description of the aforementioned embodiment.

[0101] Step 206, judging the third CML, if the third CML is greater than the product of the first average CML and the second preset parameter, and the third CML lasts for a third preset time value, then executing step 207; if not, executing step 211;

[0102] Step 207: Obtain a second average CML of the actual CML within a fourth preset time value; update the remaining charging time of the battery based on the second average CML; and send a notification message if the difference between the remaining charging time of the battery before the update and the remaining charging time after the update is greater than a fifth preset time value. The method for determining the remaining charging time of the battery based on the second average CML can be referred to the description of the previous embodiment.

[0103] Step 208, determining whether charging is to be terminated, if charging is to be terminated, executing step 209; if charging is not to be terminated, executing step 207;

[0104] Step 209: The charging pile ends charging the battery;

[0105] Step 210, determining whether charging is to be terminated, if charging is to be terminated, executing step 209; if charging is not to be terminated, executing step 203;

[0106] Step 211 , determining whether charging is to be terminated. If charging is to be terminated, executing step 209 ; if charging is not to be terminated, executing step 205 .

[0107] like Figure 3 As shown, an embodiment of the present application provides a device 30 for determining a remaining charging time, which is applied to a controller. The device 30 includes:

[0108] An acquisition module 31 is configured to acquire an actual maximum charging output capacity CML of the charging pile when the battery is being charged, and use the actual CML as a first CML;

[0109] The determination module 32 is configured to determine the remaining charging time of the battery according to the first CML.

[0110] In an optional embodiment of the present application, the device further includes:

[0111] A first updating module is configured to update the remaining charging time of the battery according to a first method when a first preset condition is met; and / or

[0112] The second updating module is configured to update the remaining charging time of the battery according to a second method when a second preset condition is met.

[0113] In an optional embodiment of the present application, the first preset condition includes:

[0114] The second CML is less than or equal to the product of the charging current request sent by the controller and the first preset parameter;

[0115] The difference between the second CML and the actual charging current collected by the controller is less than or equal to the first preset current value;

[0116] The second CML lasts for a first preset time value.

[0117] In an optional embodiment of the present application, the first update module includes:

[0118] A first acquisition submodule is configured to acquire a first average CML of actual CMLs within a second preset time value; wherein the actual CML within the second preset time value satisfies the first preset condition, and the second preset time value is less than or equal to the first preset time value;

[0119] A first updating submodule is configured to update the remaining charging time of the battery according to the first average CML.

[0120] In an optional embodiment of the present application, the second preset condition includes:

[0121] The third CML is greater than the product of the first average CML and the second preset parameter;

[0122] The third CML lasts for a third preset time value; wherein the first average CML is the average value of the actual CML within the second preset time value, and the actual CML within the second preset time meets the first preset condition.

[0123] In an optional embodiment of the present application, the second update module includes:

[0124] A second acquisition submodule is configured to acquire a second average CML of the actual CML within a fourth preset time value; wherein the actual CML within the fourth preset time value satisfies the second preset condition, and the fourth preset time value is less than or equal to the third preset time value;

[0125] A second updating submodule is configured to update the remaining charging time of the battery according to the second average CML.

[0126] In an optional embodiment of the present application, the remaining charging time of the battery is determined using the following method:

[0127] obtaining a heating cutoff temperature threshold of the battery, an initial minimum temperature of the battery, and a maximum available capacity of the battery;

[0128] According to the target CML, obtain the battery state of charge (SOC) of the charging stage corresponding to the current moment, the starting battery SOC of the charging stage corresponding to the current moment, the average temperature rise rate of the battery heating during the charging stage corresponding to the current moment, and the average charging current of the battery during the charging stage corresponding to the current moment;

[0129] The remaining charging time of the battery is determined based on the heating cut-off temperature threshold of the battery, the initial minimum temperature of the battery, the maximum available capacity of the battery, the target CML, the battery SOC of the charging stage corresponding to the current moment, the starting battery SOC of the charging stage corresponding to the current moment, the average temperature rise rate of the battery heating in the charging stage corresponding to the current moment, and the average charging current of the battery in the charging stage corresponding to the current moment; wherein the target CML includes the first CML, the first average CML, or the second average CML.

[0130] In an optional embodiment of the present application, the device further includes:

[0131] The notification module is configured to send a notification message when a difference between the remaining charging time of the battery before the update and the remaining charging time after the update is greater than a fifth time value.

[0132] The embodiment of the present application provides a device for determining the remaining charging time, which can achieve Figure 1 To avoid repetition, the various processes of the method for determining the remaining charging time in the method embodiment are not described here.

[0133] The embodiment of the present application further provides a car, including the above-mentioned device for determining the remaining charging time. All implementations in the above-mentioned device embodiments are applicable to this embodiment and can achieve the same technical effects. To avoid repetition, they are not described here.

[0134] The embodiment of the present application also provides a readable storage medium, on which a program is stored. When the program is executed by the processor, each process of the embodiment of the method for determining the remaining charging time is implemented, and the same technical effect is achieved. To avoid repetition, it is not repeated here. The readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disk, hard disk, tape, magneto-optical disk (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.

[0135] An embodiment of the present application provides a communication device, comprising: a memory, a processor, and a program stored on the memory and executable on the processor; the processor is configured to read the program in the memory to implement the steps in the method for determining the remaining charging time as described above. It should be noted that, in this document, the terms "include", "comprise", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article, or device. In the absence of further restrictions, an element defined by the statement "includes a..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0136] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0137] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A method for determining remaining charging time, characterized in that: Applicable to controllers, including: When the battery is charging, the actual maximum charging output capacity CML of the charging pile is obtained, and the actual CML is used as the first CML; determining a remaining charging time of the battery according to the first CML; updating the remaining charging time of the battery according to a first method when a first preset condition is met, wherein the first preset condition includes: the second CML is less than or equal to the product of the charging current request sent by the controller and the first preset parameter; the difference between the second CML and the actual charging current collected by the controller is less than or equal to the first preset current value; and the second CML lasts for a first preset time value; Updating the remaining charging time of the battery according to the first method includes: Obtaining a first average CML of actual CMLs within a second preset time value; wherein the actual CML within the second preset time value satisfies the first preset condition, and the second preset time value is less than or equal to the first preset time value; updating the remaining charging time of the battery according to the first average CML; The remaining charging time of the battery is determined as follows: obtaining a heating cutoff temperature threshold of the battery, an initial minimum temperature of the battery, and a maximum available capacity of the battery; According to the target CML, obtain the battery state of charge (SOC) of the charging stage corresponding to the current moment, the starting battery SOC of the charging stage corresponding to the current moment, the average temperature rise rate of the battery heating during the charging stage corresponding to the current moment, and the average charging current of the battery during the charging stage corresponding to the current moment; determining the remaining charging time of the battery based on the battery heating cut-off temperature threshold, the initial minimum temperature of the battery, the maximum available capacity of the battery, the target CML, the battery SOC of the charging stage corresponding to the current moment, the starting battery SOC of the charging stage corresponding to the current moment, the average temperature rise rate of the battery heating in the charging stage corresponding to the current moment, and the average charging current of the battery in the charging stage corresponding to the current moment; The target CML is the first CML or the first average CML.

2. The method according to claim 1, characterized in that The method further comprises: When a second preset condition is met, the remaining charging time of the battery is updated according to a second method.

3. The method according to claim 2, characterized in that The second preset condition includes: The third CML is greater than the product of the first average CML and the second preset parameter; The third CML lasts for a third preset time value; The first average CML is an average value of actual CML within a second preset time value, and the actual CML within the second preset time satisfies the first preset condition.

4. The method according to claim 3, characterized in that Updating the remaining charging time of the battery according to the second method includes: Obtaining a second average CML of the actual CML within a fourth preset time value; wherein the actual CML within the fourth preset time value satisfies the second preset condition, and the fourth preset time value is less than or equal to the third preset time value; The remaining charging time of the battery is updated according to the second average CML.

5. The method according to claim 1, characterized in that The method further comprises: In a case where the difference between the remaining charging time before the battery is updated and the remaining charging time after the update is greater than a fifth preset time value, a notification message is sent.

6. A device for determining remaining charging time, characterized in that: Applicable to controllers, including: An acquisition module, configured to acquire the actual maximum charging output capacity CML of the charging pile when the battery is being charged, and use the actual CML as the first CML; a determining module, configured to determine a remaining charging time of the battery according to the first CML; a first updating module, configured to update the remaining charging time of the battery according to a first method when a first preset condition is met, wherein the first preset condition includes: a second CML is less than or equal to a product of a charging current request sent by the controller and a first preset parameter; a difference between the second CML and an actual charging current collected by the controller is less than or equal to a first preset current value; and the second CML lasts for a first preset time value; The first update module includes: A first acquisition submodule is configured to acquire a first average CML of actual CMLs within a second preset time value; wherein the actual CML within the second preset time value satisfies the first preset condition, and the second preset time value is less than or equal to the first preset time value; a first updating submodule, configured to update the remaining charging time of the battery according to the first average CML; The remaining charging time of the battery is determined as follows: obtaining a heating cutoff temperature threshold of the battery, an initial minimum temperature of the battery, and a maximum available capacity of the battery; According to the target CML, obtain the battery state of charge (SOC) of the charging stage corresponding to the current moment, the starting battery SOC of the charging stage corresponding to the current moment, the average temperature rise rate of the battery heating during the charging stage corresponding to the current moment, and the average charging current of the battery during the charging stage corresponding to the current moment; determining the remaining charging time of the battery based on the battery heating cut-off temperature threshold, the initial minimum temperature of the battery, the maximum available capacity of the battery, the target CML, the battery SOC of the charging stage corresponding to the current moment, the starting battery SOC of the charging stage corresponding to the current moment, the average temperature rise rate of the battery heating in the charging stage corresponding to the current moment, and the average charging current of the battery in the charging stage corresponding to the current moment; The target CML is the first CML or the first average CML.

7. An automobile, characterized in that: The device comprises the device for determining the remaining charging time as claimed in claim 6.

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