Battery thermal management method and device, server, vehicle, storage medium and chip

Abstract

The invention relates to a battery thermal management method and device, a server, a vehicle, a storage medium and a chip. The method is applied to the server, and the server determines a vehicle sample set based on the accumulated driving mileage and the accumulated use day number of a plurality of vehicles; and adjusting the cooling strategy of the power battery of the vehicle in the vehicle sample set according to the operation data of the power battery of the vehicle in the vehicle sample set to obtain an adjusted cooling strategy of the power battery, and carrying out battery thermal management on the power battery of the vehicle. Historical operation data of a vehicle and a power battery are obtained through a cloud server, targeted battery heat management strategy optimization is carried out on vehicles with different battery health states on the basis of an original vehicle end cooling strategy, and the optimized targeted battery heat management strategy is issued to a corresponding vehicle end for updating. And the health state of the power battery of the vehicle is optimized and controlled in the whole life cycle, so that the service life of the power battery of the vehicle is prolonged to a certain extent.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery thermal management, and in particular to a battery thermal management method, device, server, vehicle, storage medium and chip. Background Art

[0002] In order to ensure the safety of battery use and prevent thermal runaway, the power battery in electric vehicles needs to be kept below a certain temperature (including charging and discharging). At the same time, long-term use at high temperatures will accelerate battery aging. Based on the above reasons, a key function of the battery management system is to control the temperature of the battery. When the battery reaches a high temperature state (exceeding a certain temperature threshold), the battery is cooled to reduce the battery temperature.

[0003] At present, the most commonly used battery cooling method is to cool the coolant in the pipes inside the battery pack to achieve the purpose of cooling the battery. The coolant circulates in the pipes and exchanges heat with the battery through the pipes, taking the heat away from the battery pack to achieve the purpose of cooling the battery.

[0004] The mainstream battery cooling strategy in the industry is basically obtained through offline experiments or calibration under certain specific working conditions (usually starting battery cooling at a fixed temperature 1 and stopping cooling at a fixed temperature 2), and the cooling strategy is solidified into the software and implemented in different working conditions of the vehicle. Since the actual working conditions of the vehicle are usually quite different from the working conditions of the offline test, and the battery health status will change as the battery continues to age, the battery cooling strategy obtained through experimental calibration often cannot achieve the expected effect in actual application. Summary of the invention

[0005] In order to overcome the problems existing in the related art, according to a first aspect of an embodiment of the present disclosure, a battery thermal management method is provided, which is applied to a server, and the method includes:

[0006] Obtain the cumulative mileage and cumulative usage days of multiple vehicles;

[0007] Determining a vehicle sample set from the plurality of vehicles according to the accumulated mileage and accumulated usage days of the plurality of vehicles;

[0008] Acquiring power battery operation data of vehicles in the vehicle sample set;

[0009] adjusting a power battery cooling strategy of a vehicle in the vehicle sample set according to the power battery operation data;

[0010] The adjusted power battery cooling strategy is issued to the vehicles in the vehicle sample set, so that the vehicles in the vehicle sample set perform battery thermal management on the power batteries of the vehicles based on the adjusted power battery cooling strategy.

[0011] Optionally, determining a vehicle sample set from the plurality of vehicles according to the accumulated mileage and accumulated usage days of the plurality of vehicles comprises:

[0012] For any vehicle among the multiple vehicles, when the accumulated mileage of the vehicle reaches an initial mileage threshold, counting the vehicle into the first sample set;

[0013] When the number of samples in the first sample set is greater than a first threshold, calculating the average cumulative usage days of the cumulative mileage of all vehicles in the first sample set when the cumulative mileage reaches the initial mileage threshold;

[0014] Obtaining an absolute value of a difference between the cumulative number of days of use of each vehicle in the first sample set when the cumulative mileage reaches the initial mileage threshold and the average cumulative number of days of use;

[0015] For any vehicle in the first sample set, when the absolute value of the vehicle is less than a second threshold, the vehicle is counted into the second sample set;

[0016] When the sample quantity of the second samples is greater than a third threshold, the second sample set is used as the vehicle sample set.

[0017] Optionally, the obtaining the power battery operation data of the vehicles in the vehicle sample set includes:

[0018] Obtain at least one of the cumulative high-temperature charging capacity, the cumulative high-temperature discharging capacity and the health status of the power battery when the cumulative mileage of each vehicle in the vehicle sample set reaches an initial mileage threshold, wherein the cumulative high-temperature charging capacity represents the cumulative capacity value of the power battery when charged at a temperature above the high-temperature threshold, and the cumulative high-temperature discharging capacity represents the cumulative capacity value of the power battery when discharged at a temperature above the high-temperature threshold.

[0019] Optionally, adjusting the power battery cooling strategy of the vehicles in the vehicle sample set according to the power battery operation data includes:

[0020] Collecting statistics on the power battery operation data to obtain multiple thermal management tables of the power battery;

[0021] According to the relationship between the multiple thermal management tables, the power battery cooling strategy of the vehicles in the vehicle sample set is adjusted.

[0022] Optionally, the collecting statistics of the power battery operation data to obtain a plurality of thermal management tables of the power battery includes:

[0023] Counting the vehicles whose health status of the power batteries in the vehicle sample set is low outlier, and recording them in a first thermal management table;

[0024] Counting the vehicles whose accumulated high-temperature charging capacity of the power battery in the vehicle sample set is high outlier, and recording them in a second thermal management table;

[0025] Counting the vehicles whose accumulated high-temperature discharge capacity of the power battery in the vehicle sample set is high outlier, and counting them in a third thermal management table;

[0026] Among them, the high outlier indicates that the target battery data of the vehicle is higher than the average of the target battery data of the multiple vehicles; the low outlier indicates that the target battery data of the vehicle is lower than the average of the target battery data of the multiple vehicles; the target battery data is the cumulative high-temperature charging capacity, the cumulative high-temperature discharging capacity or the health status.

[0027] Optionally, adjusting the power battery cooling strategy of the vehicles in the vehicle sample set according to the relationship between the multiple thermal management tables includes:

[0028] For a vehicle that is in both the first thermal management table and the second thermal management table, a power battery charging cooling temperature threshold of the vehicle is lowered, and the lowered power battery charging cooling temperature threshold is not lower than a first safety charging cooling temperature threshold, wherein the power battery charging cooling temperature threshold includes: a power battery charging cooling start temperature threshold and a power battery charging cooling end temperature threshold;

[0029] For a vehicle that is in both the first thermal management table and the third thermal management table, a power battery discharge cooling temperature threshold of the vehicle is lowered, and the lowered power battery discharge cooling temperature threshold is not lower than a first safe discharge cooling temperature threshold, wherein the power battery discharge cooling temperature threshold includes: a power battery discharge cooling start temperature threshold and a power battery discharge cooling end temperature threshold;

[0030] Among them, the first safe discharge cooling temperature threshold is greater than the first safe charge cooling temperature threshold; the power battery charge cooling start temperature threshold is greater than the power battery charge cooling termination temperature threshold; the power battery discharge cooling start temperature threshold is greater than the power battery discharge cooling termination temperature threshold.

[0031] Optionally, the collecting statistics of the power battery operation data to obtain a plurality of thermal management tables of the power battery includes:

[0032] Counting the vehicles whose health status of the power batteries in the vehicle sample set is highly outlier, and recording them in a fourth thermal management table;

[0033] Counting the vehicles whose accumulated high-temperature charging capacity of the power battery in the vehicle sample set is low outlier, and counting them in a fifth thermal management table;

[0034] Counting the vehicles whose accumulated high-temperature discharge capacity of the power battery in the vehicle sample set is low outlier, and counting them in the sixth thermal management table;

[0035] Among them, the high outlier indicates that the target battery data of the vehicle is higher than the average of the target battery data of the multiple vehicles; the low outlier indicates that the target battery data of the vehicle is lower than the average of the target battery data of the multiple vehicles; the target battery data is the cumulative high-temperature charging capacity, the cumulative high-temperature discharging capacity or the health status.

[0036] Optionally, adjusting the power battery cooling strategy of the vehicles in the vehicle sample set according to the relationship between the multiple thermal management tables includes:

[0037] For vehicles that are in both the fourth thermal management table and the fifth thermal management table and whose power battery health status is greater than the mileage life experience data, the power battery charging cooling temperature threshold of the vehicle is increased, and the increased power battery charging cooling temperature threshold is not lower than the second safe charging cooling temperature threshold, wherein the power battery charging cooling threshold includes: a power battery charging cooling start temperature threshold and a power battery charging cooling end temperature threshold;

[0038] For vehicles that are in both the fourth thermal management table and the sixth thermal management table and whose health status of the power battery is greater than the mileage life experience data, the power battery discharge cooling temperature threshold of the vehicle is increased, and the increased power battery discharge cooling temperature threshold is not lower than the second safe discharge cooling temperature threshold, wherein the power battery discharge cooling threshold includes: a power battery discharge cooling start temperature threshold and a power battery discharge cooling end temperature threshold;

[0039] Among them, the second safe discharge cooling temperature threshold is greater than the second safe charging cooling temperature threshold; the power battery charging cooling start temperature threshold is greater than the power battery charging cooling termination temperature threshold; the power battery discharge cooling start temperature threshold is greater than the power battery discharge cooling termination temperature threshold; the mileage life experience data is the expected value of the ratio of the remaining life of the power battery to the rated life of the power battery corresponding to different vehicle mileages.

[0040] Optionally, the collecting statistics of the power battery operation data to obtain a plurality of thermal management tables of the power battery further includes:

[0041] Obtaining the one-quarter quantile, two-quarter quantile, and three-quarter quantile of the target battery data within a value range for each vehicle in the vehicle sample set;

[0042] Obtaining an interquartile range, where the interquartile range is equal to the difference between the third quartile and the fourth quartile;

[0043] For any vehicle in the vehicle sample set, if the target battery data of the vehicle is less than the difference between the one-quarter quantile and N times the interquartile range, the vehicle is determined to be a low outlier;

[0044] If the target battery data of the vehicle is greater than the sum of the third quartile and N times the interquartile range, the vehicle is determined to be a high outlier, where N is a positive number.

[0045] Optionally, the sending the adjusted power battery cooling strategy to the vehicles in the vehicle sample set includes:

[0046] When the accumulated mileage of the vehicles in the vehicle sample set reaches an initial mileage threshold, updating the power battery cooling strategy of the vehicles in the vehicle sample set;

[0047] The updated power battery cooling strategy is issued to the vehicles in the vehicle sample set.

[0048] According to a second aspect of an embodiment of the present disclosure, a battery thermal management method is provided, which is applied to a vehicle, and the method includes:

[0049] Receiving an adjusted power battery cooling strategy sent by a server; the adjusted power battery cooling strategy is obtained after the server determines a vehicle sample set based on the accumulated mileage and accumulated days of use of multiple vehicles, and adjusts the power battery cooling strategies of the vehicles in the vehicle sample set according to the power battery operation data of the vehicles in the vehicle sample set;

[0050] Battery thermal management is performed on the power battery of the vehicle based on the adjusted power battery cooling strategy.

[0051] According to a third aspect of an embodiment of the present disclosure, a battery thermal management device is provided, which is applied to a server, and the device includes:

[0052] A first acquisition module is used to acquire the cumulative mileage and cumulative use days of multiple vehicles;

[0053] A determination module, configured to determine a vehicle sample set from the plurality of vehicles according to the accumulated mileage and accumulated usage days of the plurality of vehicles;

[0054] A second acquisition module, used to acquire power battery operation data of vehicles in the vehicle sample set;

[0055] An adjustment module, configured to adjust a power battery cooling strategy of a vehicle in the vehicle sample set according to the power battery operation data;

[0056] A sending module is used to send the adjusted power battery cooling strategy to the vehicles in the vehicle sample set, so that the vehicles in the vehicle sample set perform battery thermal management on the power battery of the vehicle based on the adjusted power battery cooling strategy.

[0057] According to a fourth aspect of an embodiment of the present disclosure, a battery thermal management device is provided, which is applied to a vehicle, and the device includes:

[0058] A receiving module, configured to receive an adjusted power battery cooling strategy sent by a server; the adjusted power battery cooling strategy is obtained after the server determines a vehicle sample set based on the accumulated mileage and accumulated days of use of multiple vehicles, and adjusts the power battery cooling strategy of the vehicles in the vehicle sample set according to the power battery operation data of the vehicles in the vehicle sample set;

[0059] A management module is used to perform battery thermal management on the power battery of the vehicle based on the adjusted power battery cooling strategy.

[0060] According to a fifth aspect of an embodiment of the present disclosure, a server is provided, including:

[0061] processor;

[0062] a memory for storing processor-executable instructions;

[0063] The processor is configured to: execute the executable instructions to perform any method described in the first aspect.

[0064] According to a sixth aspect of an embodiment of the present disclosure, a vehicle is provided, comprising:

[0065] processor;

[0066] a memory for storing processor-executable instructions;

[0067] Wherein, the processor is configured to: execute the executable instructions to execute the method described in the second aspect.

[0068] According to the seventh aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, on which computer program instructions are stored. When the program instructions are executed by a processor, the steps of the method described in any one of the first aspect or the steps of the method described in the second aspect are implemented.

[0069] According to an eighth aspect of an embodiment of the present disclosure, a chip is provided, comprising a processor and an interface; the processor is used to read instructions to execute the method described in any one of the first aspects, or to execute the steps of the method described in the second aspect.

[0070] In summary, the embodiment of the present disclosure provides a battery thermal management method, which is applied to a server, and the method includes: obtaining the cumulative mileage and cumulative use days of multiple vehicles; determining a vehicle sample set from the multiple vehicles according to the cumulative mileage and cumulative use days of the multiple vehicles; obtaining the power battery operation data of the vehicles in the vehicle sample set; adjusting the power battery cooling strategy of the vehicles in the vehicle sample set according to the power battery operation data; issuing the adjusted power battery cooling strategy to the vehicles in the vehicle sample set, so that the vehicles in the vehicle sample set perform battery thermal management on the power battery of the vehicle based on the adjusted power battery cooling strategy. The embodiment of the present disclosure can obtain the historical operation data of the vehicle and the power battery through the cloud server, and optimize the battery thermal management strategy for vehicles with different battery health states on the basis of the original vehicle-side cooling strategy, and issue the optimized targeted battery thermal management strategy to the corresponding vehicle end for updating, so as to optimize and control the power battery health state of the vehicle throughout the life cycle, avoid shortening the battery life due to unreasonable battery cooling strategy, and thus extend the service life of the vehicle power battery to a certain extent.

[0071] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0073] Figure 1 The figure is a flow chart showing a battery thermal management method according to an exemplary embodiment.

[0074] Figure 2 The figure is a flow chart showing a battery thermal management method according to an exemplary embodiment.

[0075] Figure 3 The figure is a flow chart showing a battery thermal management method according to an exemplary embodiment.

[0076] Figure 4 The figure is a flow chart showing a battery thermal management method according to an exemplary embodiment.

[0077] Figure 5 The figure is a flow chart showing a battery thermal management method according to an exemplary embodiment.

[0078] Figure 6 The figure is a flow chart showing a battery thermal management method according to an exemplary embodiment.

[0079] Figure 7 The figure is a flow chart showing a battery thermal management method according to an exemplary embodiment.

[0080] Figure 8 The figure is a flow chart showing a battery thermal management method according to an exemplary embodiment.

[0081] Fig. 9 The figure is a flow chart showing a battery thermal management method according to an exemplary embodiment.

[0082] Fig.10 The figure is a flow chart showing a battery thermal management method according to an exemplary embodiment.

[0083] Fig.11 The figure is a flow chart showing a battery thermal management method according to an exemplary embodiment.

[0084] Fig.12 is a block diagram of a battery thermal management device 1200 according to an exemplary embodiment.

[0085] Fig.13 is a block diagram of a battery thermal management device 1300 according to an exemplary embodiment.

[0086] Fig.14 is a block diagram of a server 1400 according to an exemplary embodiment.

[0087] Fig.15 is a block diagram of a vehicle 1500 according to an exemplary embodiment. DETAILED DESCRIPTION

[0088] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0089] It should be understood that the term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0090] It should be noted that the concepts of "first", "second", etc. mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units. The modifications of "one" and "multiple" mentioned in the present disclosure are illustrative and not restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more". In the description of the present disclosure, unless otherwise specified, "multiple" refers to two or more than two, and other quantifiers are similar; "at least one item", "one item or multiple items" or similar expressions refer to any combination of these items, including any combination of single items or plural items.

[0091] Although operations or steps are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood that it is required to perform these operations or steps in the specific order shown or in a serial order, or to perform all the operations or steps shown to obtain the desired results. In the embodiments of the present disclosure, these operations or steps can be performed in series; these operations or steps can also be performed in parallel; or some of these operations or steps can be performed.

[0092] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only for illustrative purposes and are not used to limit the scope of these messages or information. It is understandable that before using the technical solutions disclosed in the embodiments of the present disclosure, the types, scope of use, usage scenarios, etc. of the personal information involved in the present disclosure should be informed to the user in an appropriate manner in accordance with relevant laws and regulations and the user's authorization should be obtained. The present disclosure is described below in conjunction with specific embodiments.

[0093] First, the application scenario of the present disclosure is explained. At present, there are some online battery cooling strategies in the industry, that is, by online identification of the current driving condition of the vehicle, the cooling target temperature is dynamically adjusted, but it only takes into account the current battery energy optimization management dimension (only to achieve energy consumption optimization without overheating under the current working condition), and does not take into account the battery's health status, remaining life and other influencing factors. The impact of high temperature environment on battery life and health status is constantly changing day by day. The battery cooling strategy needs to be combined with the historical data of the current vehicle, and comprehensively consider the impact of factors such as the battery's health status and remaining life, in order to come up with a more reasonable battery cooling strategy.

[0094] The present disclosure is applied to the battery management system (BMS) of electric vehicles. The power battery system, as a power source, provides the required energy and power for the whole vehicle to meet the driving needs of the whole vehicle. Among them, the battery cooling strategy of the present disclosure is deployed in the BMS, and the current battery cooling strategy is sent to the vehicle control unit (VCU) during driving or charging. The VCU then sends the battery cooling strategy to the thermal management system for execution.

[0095] Figure 1 FIG. 1 is a flow chart of a battery thermal management method according to an exemplary embodiment. Figure 1 As shown, the embodiment of the present disclosure provides a battery thermal management method, which is applied to a server. The method may include the following steps:

[0096] In step S110, the accumulated mileage and accumulated usage days of a plurality of vehicles are obtained.

[0097] In this step, the accumulated mileage data and accumulated usage days data of multiple vehicles are obtained.

[0098] In step S120, a vehicle sample set is determined from the plurality of vehicles according to the accumulated mileage and accumulated usage days of the plurality of vehicles.

[0099] In this step, a vehicle sample set is determined from a plurality of vehicles according to the accumulated mileage data and accumulated use days data of the plurality of vehicles. Exemplarily, the vehicle sample set is a set of vehicles that meet certain accumulated mileage and certain accumulated use days.

[0100] In step S130, power battery operation data of the vehicles in the vehicle sample set is obtained.

[0101] In this step, the power battery operation data of the vehicle in the vehicle sample set is obtained. Exemplarily, the power battery operation data of the vehicle may include the cumulative high-temperature charge and discharge capacity and the power battery health state corresponding to the cumulative mileage and cumulative days of use of the vehicle. The power battery health state can be understood as the ratio of the current remaining life of the power battery to the rated life of the power battery.

[0102] In step S140 , the power battery cooling strategy of the vehicle in the vehicle sample set is adjusted according to the power battery operation data.

[0103] In this step, the power battery cooling strategy of the vehicle in the vehicle sample set is adjusted according to the power battery operation data. For example, the power battery cooling strategy of the vehicle can be adjusted in a personalized manner according to the cumulative mileage and cumulative days of use of the vehicle and the corresponding cumulative high-temperature charge and discharge capacity of the power battery and the health status of the power battery. The power battery cooling strategy can include a charge and discharge cooling temperature threshold of the power battery to avoid shortening the power battery life due to an unreasonable power battery cooling strategy, thereby extending the service life of the vehicle power battery to a certain extent.

[0104] In step S150, the adjusted power battery cooling strategy is issued to the vehicles in the vehicle sample set, so that the vehicles in the vehicle sample set perform battery thermal management on the power batteries of the vehicles based on the adjusted power battery cooling strategy.

[0105] In this step, a power battery cooling strategy adjusted according to the current usage of the vehicle is sent to the vehicles in the vehicle sample set, so that the vehicles in the vehicle sample set perform battery thermal management on the power battery of the corresponding vehicle based on the adjusted power battery cooling strategy.

[0106] In summary, the embodiment of the present disclosure provides a battery thermal management method, which is applied to a server, and the method includes: obtaining the cumulative mileage and cumulative use days of multiple vehicles; determining a vehicle sample set from the multiple vehicles according to the cumulative mileage and cumulative use days of the multiple vehicles; obtaining the power battery operation data of the vehicles in the vehicle sample set; adjusting the power battery cooling strategy of the vehicles in the vehicle sample set according to the power battery operation data; issuing the adjusted power battery cooling strategy to the vehicles in the vehicle sample set, so that the vehicles in the vehicle sample set perform battery thermal management on the power battery of the vehicle based on the adjusted power battery cooling strategy. The embodiment of the present disclosure can obtain the historical operation data of the vehicle and the power battery through the cloud server, and optimize the battery thermal management strategy for vehicles with different battery health states on the basis of the original vehicle-side cooling strategy, and issue the optimized targeted battery thermal management strategy to the corresponding vehicle end for updating, so as to optimize and control the power battery health state of the vehicle throughout the life cycle, avoid shortening the battery life due to unreasonable battery cooling strategy, and thus extend the service life of the vehicle power battery to a certain extent.

[0107] Figure 2 FIG. 1 is a flow chart of a battery thermal management method according to an exemplary embodiment. Figure 2 As shown, determining a vehicle sample set from the multiple vehicles according to the accumulated mileage and accumulated usage days of the multiple vehicles may include the following steps:

[0108] In step S1201, for any vehicle among the multiple vehicles, when the accumulated mileage of the vehicle reaches an initial mileage threshold, the vehicle is counted into the first sample set.

[0109] In this step, for any vehicle among the multiple vehicles, when the accumulated mileage of the vehicle reaches the initial mileage threshold, the vehicle is counted into the first sample set. Exemplarily, the initial mileage threshold may be 10,000 kilometers.

[0110] In step S1202, when the number of samples in the first sample set is greater than a first threshold, the average cumulative usage days of the cumulative mileage of all vehicles in the first sample set when the cumulative mileage reaches the initial mileage threshold is calculated.

[0111] In this step, when the number of samples in the first sample set is greater than the first threshold, the average cumulative use days of the cumulative mileage of all vehicles in the first sample set when the initial mileage threshold is reached is calculated. Exemplarily, the first threshold may be 1,000 vehicles. The average cumulative use days of the cumulative mileage of all vehicles in the first sample set when the initial mileage threshold of 10,000 kilometers is reached may be 300 days.

[0112] In step S1203, the absolute value of the difference between the cumulative usage days when the cumulative mileage of each vehicle in the first sample set reaches the initial mileage threshold and the average cumulative usage days is obtained.

[0113] In this step, the absolute value of the difference between the cumulative use days of each vehicle in the first sample set when the cumulative mileage reaches the initial mileage threshold and the average cumulative use days is obtained. For example, if the cumulative use days of a vehicle when the cumulative mileage reaches the initial mileage threshold of 10,000 kilometers is 350 days, and the average cumulative use days of each vehicle in the first sample set is 300 days, then the absolute value of the difference between the two is 50 days.

[0114] In step S1204, for any vehicle in the first sample set, when the absolute value of the vehicle is less than a second threshold, the vehicle is counted into the second sample set.

[0115] In this step, exemplarily, when the absolute value 50 of the cumulative usage days 350 days of a vehicle in the first sample set when the cumulative mileage reaches the initial mileage threshold of 10,000 kilometers and the average cumulative usage days 300 days of the cumulative mileage of each vehicle in the first sample set when the initial mileage threshold of 10,000 kilometers is less than the second threshold (for example, the second threshold may be 90), the vehicle is included in the second sample set.

[0116] In step S1205, when the sample quantity of the second samples is greater than a third threshold, the second sample set is used as the vehicle sample set.

[0117] In this step, when the sample quantity of the second sample is greater than the third threshold, the second sample set is used as the vehicle sample set. Exemplarily, the third threshold may be 600 vehicles.

[0118] Figure 3 FIG. 1 is a flow chart of a battery thermal management method according to an exemplary embodiment. Figure 3 As shown, the obtaining of the power battery operation data of the vehicles in the vehicle sample set may include the following steps:

[0119] In step S1301, at least one of the cumulative high-temperature charging capacity, the cumulative high-temperature discharging capacity and the health status of the power battery is obtained when the cumulative mileage of each vehicle in the vehicle sample set reaches the initial mileage threshold, wherein the cumulative high-temperature charging capacity represents the cumulative capacity value of the power battery when charged at a temperature above the high-temperature threshold, and the cumulative high-temperature discharging capacity represents the cumulative capacity value of the power battery when discharged at a temperature above the high-temperature threshold.

[0120] In this step, at least one of the accumulated high-temperature charging capacity, accumulated high-temperature discharging capacity and health status of the power battery of each vehicle in the vehicle sample set is obtained when the accumulated mileage reaches the initial mileage threshold, wherein the accumulated high-temperature charging capacity represents the accumulated capacity value of the power battery when charged at a temperature above the high-temperature threshold, and the accumulated high-temperature discharging capacity represents the accumulated capacity value of the power battery when discharged at a temperature above the high-temperature threshold. Exemplarily, the high-temperature threshold may be 40 degrees Celsius. The unit of the accumulated capacity value of high-temperature charging and discharging of the power battery is AH.

[0121] Figure 4 FIG. 1 is a flow chart of a battery thermal management method according to an exemplary embodiment. Figure 4 As shown, adjusting the power battery cooling strategy of the vehicles in the vehicle sample set according to the power battery operation data may include the following steps:

[0122] In step S1401, statistics are collected on the power battery operation data to obtain a plurality of thermal management tables of the power battery.

[0123] In this step, the power battery operation data is counted to obtain multiple thermal management forms of the power battery. Exemplarily, the multiple thermal management forms of the power battery may include a battery health status form, a battery cumulative high temperature charging capacity form, or a battery cumulative high temperature discharging capacity form.

[0124] In step S1402, the power battery cooling strategy of the vehicles in the vehicle sample set is adjusted according to the relationship between the multiple thermal management tables.

[0125] In this step, the power battery cooling strategy of the vehicles in the vehicle sample set is adjusted according to the relationship between the multiple thermal management tables. For example, the aging of the power batteries of the vehicles in the vehicle sample set can be determined according to the relationship between the multiple thermal management tables, and then the power battery cooling strategy of the vehicle can be updated according to the aging of the power batteries of the vehicles.

[0126] Figure 5 FIG. 1 is a flow chart of a battery thermal management method according to an exemplary embodiment. Figure 5As shown, the statistical analysis of the power battery operation data to obtain multiple thermal management tables of the power battery may include the following steps:

[0127] In step S14011, the vehicles whose health status of the power batteries in the vehicle sample set is low outlier are counted and entered into a first thermal management table.

[0128] In this step, the vehicles whose power battery health status in the vehicle sample set is low outlier are counted and included in the first thermal management table. The low outlier characterizes that the target battery data of the vehicle is lower than the average of the target battery data of multiple vehicles. Exemplarily, the target battery data here is the health status of the power battery.

[0129] In step S14012, the accumulated high-temperature charging capacity of the power battery in the vehicle sample set is counted and belongs to the vehicles with high outliers, and is included in the second thermal management table.

[0130] In this step, the vehicles with high outlier cumulative high-temperature charging capacity of the power battery in the vehicle sample set are counted and included in the second thermal management table. The high outlier represents that the target battery data of the vehicle is higher than the average of the target battery data of multiple vehicles. Exemplarily, the target battery data here is the cumulative high-temperature charging capacity of the power battery.

[0131] In step S14013, the vehicles whose accumulated high-temperature discharge capacity of the power batteries in the vehicle sample set are highly outliers are counted and entered into a third thermal management table.

[0132] In this step, the vehicles with high outlier cumulative high-temperature discharge capacity of the power battery in the vehicle sample set are counted and included in the third thermal management table. The high outlier characterizes that the target battery data of the vehicle is higher than the average of the target battery data of multiple vehicles. Exemplarily, the target battery data here is the cumulative high-temperature discharge capacity of the power battery.

[0133] Figure 6 FIG. 1 is a flow chart of a battery thermal management method according to an exemplary embodiment. Figure 6 As shown, adjusting the power battery cooling strategy of the vehicles in the vehicle sample set according to the relationship between the multiple thermal management tables may include the following steps:

[0134] In step S14021, for vehicles that exist in both the first thermal management form and the second thermal management form, the power battery charging cooling temperature threshold of the vehicle is lowered, and the lowered power battery charging cooling temperature threshold is not lower than the first safety charging cooling temperature threshold, wherein the power battery charging cooling temperature threshold includes: a power battery charging cooling start temperature threshold and a power battery charging cooling termination temperature threshold.

[0135] In this step, for vehicles that exist in both the first thermal management table and the second thermal management table, it means that the accumulated capacity charged above the high temperature threshold (e.g., 40 degrees Celsius) is too much, which affects the life of its power battery, so it is necessary to reduce the power battery charging cooling temperature threshold of these vehicles, for example, reduce it by 2 degrees Celsius on the basis of the original threshold, and the reduced power battery charging cooling temperature threshold is not lower than the first safe charging cooling temperature threshold, wherein the power battery charging cooling temperature threshold includes: a power battery charging cooling starting temperature threshold and a power battery charging cooling termination temperature threshold. The first safe charging cooling temperature threshold includes a first safe charging cooling starting temperature threshold and a first safe charging cooling termination temperature threshold. For example, the first safe charging cooling starting temperature threshold can be 30 degrees Celsius, and the first safe charging cooling termination temperature threshold can be 25 degrees Celsius. In this way, a more reasonable power battery thermal management strategy with targeted consideration of battery aging can be provided for the vehicle, avoiding shortening of battery life due to unreasonable battery cooling strategy, thereby extending the service life of the vehicle power battery to a certain extent.

[0136] In step S14022, for vehicles that exist in both the first thermal management form and the third thermal management form, the power battery discharge cooling temperature threshold of the vehicle is lowered, and the lowered power battery discharge cooling temperature threshold is not lower than the first safety discharge cooling temperature threshold, wherein the power battery discharge cooling temperature threshold includes: a power battery discharge cooling start temperature threshold and a power battery discharge cooling termination temperature threshold.

[0137] In this step, for vehicles that exist in both the first thermal management table and the third thermal management table, it means that the accumulated capacity discharged above the high temperature threshold (e.g., 40 degrees Celsius) is too much, which affects the life of its power battery, so it is necessary to reduce the power battery discharge cooling temperature threshold of these vehicles, for example, reduce it by 2 degrees Celsius on the basis of the original threshold, and the reduced power battery discharge cooling temperature threshold is not lower than the first safe discharge cooling temperature threshold, wherein the power battery discharge cooling temperature threshold includes: a power battery discharge cooling start temperature threshold and a power battery discharge cooling end temperature threshold. The first safe discharge cooling temperature threshold includes a first safe discharge cooling start temperature threshold and a first safe discharge cooling end temperature threshold. For example, the first safe discharge cooling start temperature threshold can be 35 degrees Celsius, and the first safe discharge cooling end temperature threshold can be 30 degrees Celsius. In this way, a more reasonable power battery thermal management strategy that takes battery aging into consideration can be provided for the vehicle, avoiding shortening the battery life due to unreasonable battery cooling strategy, thereby extending the service life of the vehicle power battery to a certain extent.

[0138] Among them, the first safe discharge cooling temperature threshold is greater than the first safe charging cooling temperature threshold, which can reduce the energy consumption of the vehicle's power battery and improve the vehicle's cruising range.

[0139] The power battery charging and cooling start temperature threshold is greater than the power battery charging and cooling end temperature threshold, which can ensure the safe use of the vehicle power battery and improve the battery life.

[0140] The power battery discharge cooling start temperature threshold is greater than the power battery discharge cooling end temperature threshold. This can ensure the use safety of the vehicle power battery and improve the battery life.

[0141] Figure 7 FIG. 1 is a flow chart of a battery thermal management method according to an exemplary embodiment. Figure 7 As shown, the statistical analysis of the power battery operation data to obtain multiple thermal management tables of the power battery may include the following steps:

[0142] In step S14014, the vehicles whose health status of the power batteries in the vehicle sample set is highly outlier are counted and entered into a fourth thermal management table.

[0143] In this step, the vehicles whose power battery health status in the vehicle sample set is highly outlier are counted and included in the fourth thermal management table. The target battery data of the high outlier characterization vehicle is higher than the average of the target battery data of multiple vehicles. Exemplarily, the target battery data here is the health status of the power battery.

[0144] In step S14015, the vehicles whose accumulated high-temperature charging capacity of the power battery in the vehicle sample set is low outlier are counted and included in the fifth thermal management table.

[0145] In this step, the vehicles whose cumulative high-temperature charging capacity of the power battery in the vehicle sample set is low outlier are counted and included in the fifth thermal management table. The low outlier characterizes that the target battery data of the vehicle is lower than the average of the target battery data of multiple vehicles. Exemplarily, the target battery data here is the cumulative high-temperature charging capacity of the power battery.

[0146] In step S14016, the vehicles whose cumulative high-temperature discharge capacity of the power battery in the vehicle sample set is low outlier are counted and included in the sixth thermal management table.

[0147] In this step, the vehicles with low outlier cumulative high-temperature discharge capacity of the power battery in the vehicle sample set are counted and included in the sixth thermal management table. The low outlier characterizes that the target battery data of the vehicle is lower than the average of the target battery data of multiple vehicles. Exemplarily, the target battery data here is the cumulative high-temperature discharge capacity of the power battery.

[0148] Figure 8 FIG. 1 is a flow chart of a battery thermal management method according to an exemplary embodiment. Figure 8 As shown, adjusting the power battery cooling strategy of the vehicles in the vehicle sample set according to the relationship between the multiple thermal management tables may include the following steps:

[0149] In step S14023, for vehicles that exist in both the fourth thermal management form and the fifth thermal management form and whose power battery health status is greater than the mileage life experience data, the power battery charging cooling temperature threshold of the vehicle is increased, and the increased power battery charging cooling temperature threshold is not lower than the second safety charging cooling temperature threshold, wherein the power battery charging cooling threshold includes: a power battery charging cooling start temperature threshold and a power battery charging cooling termination temperature threshold.

[0150] In this step, for vehicles that are present in both the fourth thermal management table and the fifth thermal management table and whose health status of the power battery is greater than the mileage life experience data, the mileage life experience data is the expected value of the ratio of the remaining life of the power battery to the rated life of the power battery corresponding to different vehicle mileages, which is generally determined by negotiation between the battery supplier and the vehicle manufacturer. For these vehicles, it means that their power battery life is in good condition, and the high-temperature charging behavior has a negligible impact on their power battery life. There is no need to consume too much battery power for cooling during normal charging, so the power battery charging cooling temperature threshold of these vehicles can be increased, for example, by 2 degrees Celsius on the basis of the original threshold, and the increased power battery charging cooling temperature threshold is not lower than the second safe charging cooling temperature threshold, wherein the power battery charging cooling threshold includes: a power battery charging cooling starting temperature threshold and a power battery charging cooling termination temperature threshold. The second safe charging cooling temperature threshold includes a second safe charging cooling starting temperature threshold and a second safe charging cooling termination temperature threshold. For example, the second safe charging cooling starting temperature threshold may be 40 degrees Celsius, and the first safe charging cooling termination temperature threshold may be 35 degrees Celsius. This can provide the vehicle with a more reasonable power battery thermal management strategy that takes battery aging into account, reducing unnecessary battery energy consumption on battery cooling, thereby reducing power battery energy consumption and increasing vehicle range.

[0151] In step S14024, for vehicles that exist in both the fourth thermal management form and the sixth thermal management form and whose power battery health status is greater than the mileage life experience data, the power battery discharge cooling temperature threshold of the vehicle is increased, and the increased power battery discharge cooling temperature threshold is not lower than the second safe discharge cooling temperature threshold, wherein the power battery discharge cooling threshold includes: a power battery discharge cooling start temperature threshold and a power battery discharge cooling termination temperature threshold.

[0152] In this step, for vehicles that are both in the fourth thermal management table and the sixth thermal management table and whose power battery health status is greater than the mileage life experience data, the mileage life experience data is the expected value of the ratio of the remaining life of the power battery to the rated life of the power battery under different vehicle mileages, which is generally determined by negotiation between the battery supplier and the vehicle manufacturer. For these vehicles, it means that their power battery life status is good, and the high-temperature discharge behavior has a negligible impact on their power battery life. There is no need to consume too much battery power for cooling during normal charging, so the power battery discharge cooling temperature threshold of these vehicles can be increased, for example, by 2 degrees Celsius on the basis of the original threshold, and the increased power battery discharge cooling temperature threshold is not lower than the second safe discharge cooling temperature threshold, wherein the power battery discharge cooling threshold includes: a power battery discharge cooling start temperature threshold and a power battery discharge cooling end temperature threshold. The second safe discharge cooling temperature threshold includes a second safe discharge cooling start temperature threshold and a second safe discharge cooling end temperature threshold. For example, the second safe discharge cooling start temperature threshold can be 45 degrees Celsius, and the first safe discharge cooling end temperature threshold can be 40 degrees Celsius. This can provide the vehicle with a more reasonable power battery thermal management strategy that takes battery aging into account, reducing unnecessary battery energy consumption on battery cooling, thereby reducing power battery energy consumption and increasing vehicle range.

[0153] Among them, the second safe discharge cooling temperature threshold is greater than the second safe charging cooling temperature threshold, which can reduce the energy consumption of the vehicle's power battery and improve the vehicle's cruising range.

[0154] The power battery charging cooling start temperature threshold is greater than the power battery charging cooling end temperature threshold, which can ensure the safe use of the vehicle power battery and improve the battery life.

[0155] The power battery discharge cooling start temperature threshold is greater than the power battery discharge cooling end temperature threshold, which can ensure the safe use of the vehicle power battery and improve the battery life.

[0156] Fig. 9 FIG. 1 is a flow chart of a battery thermal management method according to an exemplary embodiment. Fig. 9 As shown, the statistical analysis of the power battery operation data to obtain multiple thermal management tables of the power battery may also include the following steps:

[0157] In step S210, the one-quarter quantile, two-quarter quantile and three-quarter quantile of the target battery data of each vehicle in the vehicle sample set within a value range are obtained.

[0158] In this step, the one-quarter quantile, two-quarter quantile and three-quarter quantile of the target battery data of each vehicle in the vehicle sample set within the value range are obtained. For example, the target battery data of each vehicle can be arranged in order from small to large values, and then the one-quarter quantile, two-quarter quantile and three-quarter quantile of each target battery data of each vehicle are counted.

[0159] In step S220, the interquartile range is obtained, where the interquartile range is equal to the difference between the third quartile and the fourth quartile.

[0160] In this step, the interquartile range is obtained, which is equal to the difference between the third quartile and the fourth quartile. Exemplarily, the interquartile range of each target battery data of each vehicle is obtained, and the interquartile range of each target battery data of each vehicle is equal to the difference between the third quartile and the fourth quartile of each target battery data of each vehicle.

[0161] In step S230, for any vehicle in the vehicle sample set, if the target battery data of the vehicle is smaller than the difference between the one-quarter quantile and N times the interquartile range, the vehicle is determined to be a low outlier.

[0162] In this step, for any vehicle in the vehicle sample set, if the target battery data of the vehicle is less than the difference between the one-quarter quantile and N times the interquartile range, the vehicle is determined to be a low outlier, where N is a positive number, and illustratively, N may be 1.5.

[0163] In step S240 , if the target battery data of the vehicle is greater than the sum of the third quartile and N times the interquartile range, it is determined that the vehicle is a high outlier, where N is a positive number.

[0164] In this step, if the target battery data of the vehicle is greater than the sum of the third quartile and N times the interquartile range, the vehicle is determined to be a high outlier, where N is a positive number, and illustratively, N may be 1.5.

[0165] Fig.10 FIG. 1 is a flow chart of a battery thermal management method according to an exemplary embodiment. Fig.10 As shown, sending the adjusted power battery cooling strategy to the vehicles in the vehicle sample set may include the following steps:

[0166] In step S1501, the power battery cooling strategy of the vehicles in the vehicle sample set is updated once each time the accumulated mileage of the vehicles in the vehicle sample set reaches an initial mileage threshold.

[0167] In this step, the power battery cooling strategy of the vehicles in the vehicle sample set is updated every time the cumulative mileage of the vehicles in the vehicle sample set reaches the initial mileage threshold. For example, the initial mileage threshold may be 10,000 kilometers. In this way, the health status of the vehicle's power battery can be optimized and controlled throughout the life cycle of the vehicle's power battery, avoiding shortening of the battery life due to unreasonable battery cooling strategies, thereby extending the service life of the vehicle's power battery to a certain extent.

[0168] In step S1502, the updated power battery cooling strategy is sent to the vehicles in the vehicle sample set.

[0169] In this step, the updated power battery cooling strategy is issued to the vehicles in the vehicle sample set. This can optimize the control of the vehicle's power battery health status throughout its life cycle, avoid shortening the battery life due to unreasonable battery cooling strategies, and thus extend the service life of the vehicle's power battery to a certain extent.

[0170] In summary, the embodiment of the present disclosure provides a battery thermal management method, which is applied to a server, and the method includes: obtaining the cumulative mileage and cumulative use days of multiple vehicles; determining a vehicle sample set from the multiple vehicles according to the cumulative mileage and cumulative use days of the multiple vehicles; obtaining the power battery operation data of the vehicles in the vehicle sample set; adjusting the power battery cooling strategy of the vehicles in the vehicle sample set according to the power battery operation data; issuing the adjusted power battery cooling strategy to the vehicles in the vehicle sample set, so that the vehicles in the vehicle sample set perform battery thermal management on the power battery of the vehicle based on the adjusted power battery cooling strategy. The embodiment of the present disclosure can obtain the historical operation data of the vehicle and the power battery through the cloud server, and optimize the battery thermal management strategy for vehicles with different battery health states on the basis of the original vehicle-side cooling strategy, and issue the optimized targeted battery thermal management strategy to the corresponding vehicle end for updating, so as to optimize and control the power battery health state of the vehicle throughout the life cycle, avoid shortening the battery life due to unreasonable battery cooling strategy, and thus extend the service life of the vehicle power battery to a certain extent.

[0171] Fig.11 FIG. 1 is a flow chart of a battery thermal management method according to an exemplary embodiment. Fig.11 As shown, the embodiment of the present disclosure provides a battery thermal management method, which is applied to a vehicle. The method may include the following steps:

[0172] In step S310, an adjusted power battery cooling strategy is received from the server; the adjusted power battery cooling strategy is obtained after the server determines a vehicle sample set based on the accumulated mileage and accumulated usage days of multiple vehicles, and adjusts the power battery cooling strategies of the vehicles in the vehicle sample set according to the power battery operation data of the vehicles in the vehicle sample set.

[0173] In this step, the adjusted power battery cooling strategy sent by the server is received; the adjusted power battery cooling strategy is obtained after the server determines the vehicle sample set based on the cumulative mileage and cumulative days of use of multiple vehicles, and adjusts the power battery cooling strategy of the vehicles in the vehicle sample set according to the power battery operation data of the vehicles in the vehicle sample set. The method for the server to generate the adjusted power battery cooling strategy can refer to the previous embodiment and will not be repeated here. The server can be a server that provides cloud services to the vehicle, which can be provided by the manufacturer of the vehicle or by a third party. The server can be a single server or a server cluster consisting of multiple servers.

[0174] In step S320, battery thermal management is performed on the power battery of the vehicle based on the adjusted power battery cooling strategy.

[0175] In this step, battery thermal management is performed on the vehicle's power battery based on the adjusted power battery cooling strategy.

[0176] In summary, the disclosed embodiment provides a battery thermal management method, which is applied to a vehicle, and the method includes receiving an adjusted power battery cooling strategy sent by a server; the adjusted power battery cooling strategy is obtained by adjusting the power battery cooling strategy of the vehicles in the vehicle sample set according to the power battery operation data of the vehicles in the vehicle sample set after the server determines a vehicle sample set based on the accumulated mileage and accumulated days of use of multiple vehicles; and performing battery thermal management on the power battery of the vehicle based on the adjusted power battery cooling strategy. The disclosed embodiment can optimize and control the health status of the vehicle's power battery throughout its life cycle, avoid shortening the battery life due to unreasonable battery cooling strategies, and thus extend the service life of the vehicle's power battery to a certain extent.

[0177] Fig.12 1 is a block diagram of a battery thermal management device 1200 according to an exemplary embodiment. Fig.12 As shown, the embodiment of the present disclosure provides a battery thermal management device 1200, which is applied to a server. The device 1200 may include the following modules:

[0178] The first acquisition module 1210 is used to acquire the cumulative mileage and cumulative use days of multiple vehicles;

[0179] A determination module 1220, configured to determine a vehicle sample set from the plurality of vehicles according to the accumulated mileage and accumulated usage days of the plurality of vehicles;

[0180] A second acquisition module 1230 is used to acquire power battery operation data of vehicles in the vehicle sample set;

[0181] An adjustment module 1240, configured to adjust a power battery cooling strategy of a vehicle in the vehicle sample set according to the power battery operation data;

[0182] The sending module 1250 is used to send the adjusted power battery cooling strategy to the vehicles in the vehicle sample set, so that the vehicles in the vehicle sample set perform battery thermal management on the power batteries of the vehicles based on the adjusted power battery cooling strategy.

[0183] Optionally, the determination module 1220 includes a first statistical module, configured to count any vehicle among the plurality of vehicles into the first sample set when the accumulated mileage of the vehicle reaches an initial mileage threshold;

[0184] The determination module 1220 includes an average cumulative use days calculation module, which is used to calculate the average cumulative use days of the cumulative mileage of all vehicles in the first sample set when the cumulative mileage reaches the initial mileage threshold when the number of samples in the first sample set is greater than the first threshold;

[0185] The determination module 1220 includes a difference absolute value acquisition module, which is used to obtain the absolute value of the difference between the cumulative use days of each vehicle in the first sample set when the cumulative mileage reaches the initial mileage threshold and the average cumulative use days;

[0186] The determination module 1220 includes a second statistical module, configured to count any vehicle in the first sample set into the second sample set when the absolute value of the vehicle is less than a second threshold;

[0187] The determination module 1220 includes a vehicle sample set acquisition module, which is used to use the second sample set as the vehicle sample set when the sample quantity of the second sample is greater than a third threshold.

[0188] Optionally, the second acquisition module 1230 includes a second acquisition sub-module, which is used to obtain at least one of the cumulative high-temperature charging capacity, the cumulative high-temperature discharging capacity and the health status of the power battery when the cumulative mileage of each vehicle in the vehicle sample set reaches an initial mileage threshold, wherein the cumulative high-temperature charging capacity represents the cumulative capacity value of the power battery when charged at a temperature above the high-temperature threshold, and the cumulative high-temperature discharging capacity represents the cumulative capacity value of the power battery when discharged at a temperature above the high-temperature threshold.

[0189] Optionally, the adjustment module 1240 includes a thermal management form acquisition module, which is used to collect statistics on the power battery operation data to obtain a plurality of thermal management forms of the power battery;

[0190] The adjustment module 1240 includes an adjustment submodule, which is used to adjust the power battery cooling strategy of the vehicles in the vehicle sample set according to the relationship between the multiple thermal management tables.

[0191] Optionally, the thermal management form acquisition module includes a first thermal management form acquisition module, which is used to count vehicles in the vehicle sample set whose health status of the power battery is low outlier, and enter them into a first thermal management form;

[0192] The thermal management form acquisition module includes a second thermal management form acquisition module, which is used to count the vehicles whose cumulative high-temperature charging capacity of the power battery in the vehicle sample set is high outlier, and enter them into the second thermal management form;

[0193] The thermal management form acquisition module includes a third thermal management form acquisition module, which is used to count the vehicles whose cumulative high-temperature discharge capacity of the power battery in the vehicle sample set is high outlier, and include them in the third thermal management form;

[0194] Among them, the high outlier indicates that the target battery data of the vehicle is higher than the average of the target battery data of the multiple vehicles; the low outlier indicates that the target battery data of the vehicle is lower than the average of the target battery data of the multiple vehicles; the target battery data is the cumulative high-temperature charging capacity, the cumulative high-temperature discharging capacity or the health status.

[0195] Optionally, the adjustment submodule includes a first adjustment module, which is used to reduce the power battery charging cooling temperature threshold of the vehicle for the vehicle that exists in both the first thermal management table and the second thermal management table, and the reduced power battery charging cooling temperature threshold is not lower than the first safe charging cooling temperature threshold, wherein the power battery charging cooling temperature threshold includes: a power battery charging cooling start temperature threshold and a power battery charging cooling end temperature threshold;

[0196] The adjustment submodule includes a second adjustment module, which is used to reduce the power battery discharge cooling temperature threshold of the vehicle for the vehicle that exists in both the first thermal management table and the third thermal management table, and the reduced power battery discharge cooling temperature threshold is not lower than the first safe discharge cooling temperature threshold, wherein the power battery discharge cooling temperature threshold includes: a power battery discharge cooling start temperature threshold and a power battery discharge cooling end temperature threshold;

[0197] Among them, the first safe discharge cooling temperature threshold is greater than the first safe charge cooling temperature threshold; the power battery charge cooling start temperature threshold is greater than the power battery charge cooling termination temperature threshold; the power battery discharge cooling start temperature threshold is greater than the power battery discharge cooling termination temperature threshold.

[0198] Optionally, the thermal management form acquisition module includes a fourth thermal management form acquisition module, which is used to count the vehicles whose health status of the power battery in the vehicle sample set is highly outlier, and enter them into a fourth thermal management form;

[0199] The thermal management form acquisition module includes a fifth thermal management form acquisition module, which is used to count the vehicles whose cumulative high-temperature charging capacity of the power battery in the vehicle sample set is low outlier, and count them into the fifth thermal management form;

[0200] The thermal management form acquisition module includes a sixth thermal management form acquisition module, which is used to count the vehicles whose cumulative high-temperature discharge capacity of the power battery in the vehicle sample set is low outlier, and include them in the sixth thermal management form;

[0201] Among them, the high outlier indicates that the target battery data of the vehicle is higher than the average of the target battery data of the multiple vehicles; the low outlier indicates that the target battery data of the vehicle is lower than the average of the target battery data of the multiple vehicles; the target battery data is the cumulative high-temperature charging capacity, the cumulative high-temperature discharging capacity or the health status.

[0202] Optionally, the adjustment submodule includes a third adjustment module, which is used to increase the power battery charging cooling temperature threshold of the vehicle for a vehicle that exists in both the fourth thermal management table and the fifth thermal management table and whose health status of the power battery is greater than the mileage life experience data, and the increased power battery charging cooling temperature threshold is not lower than the second safe charging cooling temperature threshold, wherein the power battery charging cooling threshold includes: a power battery charging cooling start temperature threshold and a power battery charging cooling termination temperature threshold;

[0203] The adjustment submodule includes a fourth adjustment module, which is used to increase the power battery discharge cooling temperature threshold of the vehicle for the vehicle that exists in both the fourth thermal management table and the sixth thermal management table and the health status of the power battery is greater than the mileage life experience data, and the increased power battery discharge cooling temperature threshold is not lower than the second safe discharge cooling temperature threshold, wherein the power battery discharge cooling threshold includes: a power battery discharge cooling start temperature threshold and a power battery discharge cooling end temperature threshold;

[0204] Among them, the second safe discharge cooling temperature threshold is greater than the second safe charging cooling temperature threshold; the power battery charging cooling start temperature threshold is greater than the power battery charging cooling termination temperature threshold; the power battery discharge cooling start temperature threshold is greater than the power battery discharge cooling termination temperature threshold; the mileage life experience data is the expected value of the ratio of the remaining life of the power battery to the rated life of the power battery corresponding to different vehicle mileages.

[0205] Optionally, the thermal management form acquisition module includes a quartile acquisition module, which is used to acquire the one-quarter quartile, two-quarter quartile and three-quarter quartile of the target battery data of each vehicle in the vehicle sample set within a value range;

[0206] The thermal management form acquisition module includes an interquartile range acquisition module, which is used to acquire the interquartile range, and the interquartile range is equal to the difference between the third quarter quantile and the fourth quarter quantile;

[0207] The thermal management form acquisition module includes an outlier determination module, which is used to determine, for any vehicle in the vehicle sample set, that the vehicle is a low outlier if the target battery data of the vehicle is less than the difference between the one-quarter quantile and N times the interquartile range;

[0208] If the target battery data of the vehicle is greater than the sum of the third quartile and N times the interquartile range, the vehicle is determined to be a high outlier, where N is a positive number.

[0209] Optionally, the sending module 1250 includes an updating module, which is used to update the power battery cooling strategy of the vehicles in the vehicle sample set once when the cumulative mileage of the vehicles in the vehicle sample set reaches an initial mileage threshold;

[0210] The sending module 1250 includes a sending submodule, which is used to send the updated power battery cooling strategy to the vehicles in the vehicle sample set.

[0211] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0212] The present disclosure also provides a computer-readable storage medium having computer program instructions stored thereon, and the program instructions implement the steps of the above-mentioned battery thermal management method when executed by a processor.

[0213] In summary, an embodiment of the present disclosure provides a battery thermal management device, which is applied to a server, and the device includes: a first acquisition module, used to obtain the cumulative mileage and cumulative usage days of multiple vehicles; a determination module, used to determine a vehicle sample set from the multiple vehicles according to the cumulative mileage and cumulative usage days of the multiple vehicles; a second acquisition module, used to obtain power battery operation data of the vehicles in the vehicle sample set; an adjustment module, used to adjust the power battery cooling strategy of the vehicles in the vehicle sample set according to the power battery operation data; a sending module, used to send the adjusted power battery cooling strategy to the vehicles in the vehicle sample set, so that the vehicles in the vehicle sample set perform battery thermal management on the power batteries of the vehicles based on the adjusted power battery cooling strategy. The disclosed embodiment can obtain the historical operating data of the vehicle and the power battery through the cloud server, and on the basis of the original vehicle-side cooling strategy, optimize the battery thermal management strategy for vehicles with different battery health states, and send the optimized targeted battery thermal management strategy to the corresponding vehicle side for updating, so as to optimize and control the health state of the vehicle's power battery throughout the life cycle, avoid shortening the battery life due to unreasonable battery cooling strategy, and thus extend the service life of the vehicle's power battery to a certain extent.

[0214] Fig.13 1 is a block diagram of a battery thermal management device 1300 according to an exemplary embodiment. Fig.13 As shown, the embodiment of the present disclosure provides a battery thermal management device 1300, which is applied to a vehicle. The device 1300 may include the following modules:

[0215] The receiving module 1310 is used to receive the adjusted power battery cooling strategy sent by the server; the adjusted power battery cooling strategy is obtained after the server determines a vehicle sample set based on the accumulated mileage and accumulated days of use of multiple vehicles, and adjusts the power battery cooling strategy of the vehicles in the vehicle sample set according to the power battery operation data of the vehicles in the vehicle sample set;

[0216] The management module 1320 is used to perform battery thermal management on the power battery of the vehicle based on the adjusted power battery cooling strategy.

[0217] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0218] The present disclosure also provides a computer-readable storage medium having computer program instructions stored thereon, and the program instructions implement the steps of the above-mentioned battery thermal management method when executed by a processor.

[0219] In summary, the disclosed embodiment provides a battery thermal management device, which is applied to a vehicle, and the device includes: a receiving module, which is used to receive an adjusted power battery cooling strategy sent by a server; the adjusted power battery cooling strategy is obtained after the server determines a vehicle sample set based on the cumulative mileage and cumulative days of use of multiple vehicles, and adjusts the power battery cooling strategy of the vehicles in the vehicle sample set according to the power battery operation data of the vehicles in the vehicle sample set; a management module, which is used to perform battery thermal management on the power battery of the vehicle based on the adjusted power battery cooling strategy. The disclosed embodiment can optimize and control the health status of the vehicle's power battery throughout the life cycle, avoid shortening the battery life due to unreasonable battery cooling strategies, and thus extend the service life of the vehicle's power battery to a certain extent.

[0220] Fig.14 FIG. 1 is a block diagram of a server 1400 according to an exemplary embodiment. Fig.14 The server 1400 includes a processing component 1422, which further includes one or more processors, and a memory resource represented by a memory 1432 for storing instructions executable by the processing component 1422, such as an application. The application stored in the memory 1432 may include one or more modules, each corresponding to a set of instructions. In addition, the processing component 1422 is configured to execute instructions to perform the above-mentioned battery thermal management method.

[0221] The server 1400 may also include a power supply component 1426 configured to perform power management of the server 1400, a wired or wireless network interface 1450 configured to connect the server 1400 to a network, and an input / output interface 1458. The server 1400 may operate based on an operating system stored in the memory 1432.

[0222] In addition to being an independent electronic device, the server 1400 may also be a part of an independent electronic device. For example, in one embodiment, the server 1400 may be an integrated circuit (IC) or a chip, wherein the integrated circuit may be an IC or a collection of multiple ICs; the chip may include but is not limited to the following types: GPU (Graphics Processing Unit), CPU (Central Processing Unit), FPGA (Field Programmable Gate Array), DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), SOC (System on Chip, SoC, system on chip or system-level chip), etc. The above-mentioned integrated circuit or chip can be used to execute executable instructions (or codes) to implement the above-mentioned battery thermal management method. The executable instructions may be stored in the integrated circuit or chip, or may be obtained from other servers or devices, such as the integrated circuit or chip including a processor, a memory, and an interface for communicating with other servers. The executable instruction may be stored in the memory, and when the executable instruction is executed by the processor, the above-mentioned battery thermal management method is implemented; alternatively, the integrated circuit or chip may receive the executable instruction through the interface and transmit it to the processor for execution, so as to implement the above-mentioned battery thermal management method.

[0223] In another exemplary embodiment, a computer program product is further provided. The computer program product includes a computer program that can be executed by a programmable server. The computer program has a code portion for executing the above-mentioned battery thermal management method when executed by the programmable server.

[0224] Fig.15 FIG. 1 is a block diagram of a vehicle 1500 according to an exemplary embodiment. Fig.15 , the vehicle 1500 may include various subsystems, for example, an infotainment system 1510, a perception system 1520, a decision control system 1530, a drive system 1540, and a computing platform 1550. The vehicle 1500 may also include more or fewer subsystems, and each subsystem may include multiple components. In addition, each subsystem and each component of the vehicle 1500 may be interconnected by wire or wireless means.

[0225] In some embodiments, the infotainment system 1510 may include a communication system, an entertainment system, and a navigation system, etc.

[0226] The perception system 1520 may include several sensors for sensing information about the environment around the vehicle 1500. For example, the perception system 1520 may include a global positioning system (the global positioning system may be a GPS system, or a Beidou system or other positioning systems), an inertial measurement unit (IMU), a laser radar, a millimeter wave radar, an ultrasonic radar, and a camera.

[0227] The decision control system 1530 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0228] The drive system 1540 may include components that provide powered motion for the vehicle 1500. In one embodiment, the drive system 1540 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of an internal combustion engine, an electric motor, and an air compression engine. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0229] Some or all functions of the vehicle 1500 are controlled by a computing platform 1550. The computing platform 1550 may include at least one processor 1551 and a memory 1552, and the processor 1551 may execute instructions 1553 stored in the memory 1552.

[0230] The processor 1551 may be any conventional processor, such as a commercially available CPU. The processor may also include a graphics processor (Graphic Process Unit, GPU), a field programmable gate array (Field Programmable Gate Array, FPGA), a system on chip (System on Chip, SOC), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC) or a combination thereof.

[0231] Memory 1552 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0232] In addition to instructions 1553 , memory 1552 may also store data, such as road maps, route information, and data such as the location, direction, and speed of the vehicle. The data stored in memory 1552 may be used by computing platform 1550 .

[0233] In the embodiment of the present disclosure, the processor 1551 may execute instruction 1553 to complete all or part of the steps of the above-mentioned battery thermal management method.

[0234] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program executable by a programmable device. The computer program has a code portion for executing the above-mentioned battery thermal management method when executed by the programmable device.

[0235] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be considered as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0236] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery thermal management method, characterized in that: Applied to a server, the method comprises: Obtain the cumulative mileage and cumulative usage days of multiple vehicles; Determining a vehicle sample set from the plurality of vehicles according to the accumulated mileage and accumulated usage days of the plurality of vehicles; Acquiring power battery operation data of vehicles in the vehicle sample set; adjusting a power battery cooling strategy of a vehicle in the vehicle sample set according to the power battery operation data; The adjusted power battery cooling strategy is issued to the vehicles in the vehicle sample set, so that the vehicles in the vehicle sample set perform battery thermal management on the power batteries of the vehicles based on the adjusted power battery cooling strategy.

2. The battery thermal management method according to claim 1, characterized in that: The step of determining a vehicle sample set from the plurality of vehicles according to the accumulated mileage and accumulated usage days of the plurality of vehicles comprises: For any vehicle among the multiple vehicles, when the accumulated mileage of the vehicle reaches an initial mileage threshold, counting the vehicle into the first sample set; When the number of samples in the first sample set is greater than a first threshold, calculating the average cumulative usage days of the cumulative mileage of all vehicles in the first sample set when the cumulative mileage reaches the initial mileage threshold; Obtaining an absolute value of a difference between the cumulative number of days of use of each vehicle in the first sample set when the cumulative mileage reaches the initial mileage threshold and the average cumulative number of days of use; For any vehicle in the first sample set, when the absolute value of the vehicle is less than a second threshold, the vehicle is counted into the second sample set; When the sample quantity of the second samples is greater than a third threshold, the second sample set is used as the vehicle sample set.

3. The battery thermal management method according to claim 1, characterized in that: The obtaining of the power battery operation data of the vehicles in the vehicle sample set includes: Obtain at least one of the cumulative high-temperature charging capacity, the cumulative high-temperature discharging capacity and the health status of the power battery when the cumulative mileage of each vehicle in the vehicle sample set reaches an initial mileage threshold, wherein the cumulative high-temperature charging capacity represents the cumulative capacity value of the power battery when charged at a temperature above the high-temperature threshold, and the cumulative high-temperature discharging capacity represents the cumulative capacity value of the power battery when discharged at a temperature above the high-temperature threshold.

4. The battery thermal management method according to claim 3, characterized in that: The step of adjusting the power battery cooling strategy of the vehicles in the vehicle sample set according to the power battery operation data includes: Collecting statistics on the power battery operation data to obtain multiple thermal management tables of the power battery; According to the relationship between the multiple thermal management tables, the power battery cooling strategy of the vehicles in the vehicle sample set is adjusted.

5. The battery thermal management method according to claim 4, characterized in that: The step of collecting statistics on the power battery operation data to obtain a plurality of thermal management tables of the power battery includes: Counting the vehicles whose health status of the power batteries in the vehicle sample set is low outlier, and recording them in a first thermal management table; Counting the vehicles whose accumulated high-temperature charging capacity of the power battery in the vehicle sample set is high outlier, and recording them in a second thermal management table; Counting the vehicles whose accumulated high-temperature discharge capacity of the power battery in the vehicle sample set is high outlier, and counting them in a third thermal management table; Among them, the high outlier indicates that the target battery data of the vehicle is higher than the average of the target battery data of the multiple vehicles; the low outlier indicates that the target battery data of the vehicle is lower than the average of the target battery data of the multiple vehicles; the target battery data is the cumulative high-temperature charging capacity, the cumulative high-temperature discharging capacity or the health status.

6. The battery thermal management method according to claim 5, characterized in that: The adjusting the power battery cooling strategy of the vehicles in the vehicle sample set according to the relationship between the multiple thermal management tables includes: For a vehicle that is in both the first thermal management table and the second thermal management table, a power battery charging cooling temperature threshold of the vehicle is lowered, and the lowered power battery charging cooling temperature threshold is not lower than a first safety charging cooling temperature threshold, wherein the power battery charging cooling temperature threshold includes: a power battery charging cooling start temperature threshold and a power battery charging cooling end temperature threshold; For a vehicle that is in both the first thermal management table and the third thermal management table, a power battery discharge cooling temperature threshold of the vehicle is lowered, and the lowered power battery discharge cooling temperature threshold is not lower than a first safe discharge cooling temperature threshold, wherein the power battery discharge cooling temperature threshold includes: a power battery discharge cooling start temperature threshold and a power battery discharge cooling end temperature threshold; Among them, the first safe discharge cooling temperature threshold is greater than the first safe charge cooling temperature threshold; the power battery charge cooling start temperature threshold is greater than the power battery charge cooling termination temperature threshold; the power battery discharge cooling start temperature threshold is greater than the power battery discharge cooling termination temperature threshold.

7. The battery thermal management method according to claim 4, characterized in that: The step of collecting statistics on the power battery operation data to obtain a plurality of thermal management tables of the power battery includes: Counting the vehicles whose health status of the power batteries in the vehicle sample set is highly outlier, and recording them in a fourth thermal management table; Counting the vehicles whose accumulated high-temperature charging capacity of the power battery in the vehicle sample set is low outlier, and counting them in a fifth thermal management table; Counting the vehicles whose accumulated high-temperature discharge capacity of the power battery in the vehicle sample set is low outlier, and counting them in the sixth thermal management table; Among them, the high outlier indicates that the target battery data of the vehicle is higher than the average of the target battery data of the multiple vehicles; the low outlier indicates that the target battery data of the vehicle is lower than the average of the target battery data of the multiple vehicles; the target battery data is the cumulative high-temperature charging capacity, the cumulative high-temperature discharging capacity or the health status.

8. The battery thermal management method according to claim 7, characterized in that: The adjusting the power battery cooling strategy of the vehicles in the vehicle sample set according to the relationship between the multiple thermal management tables includes: For vehicles that are in both the fourth thermal management table and the fifth thermal management table and whose power battery health status is greater than the mileage life experience data, the power battery charging cooling temperature threshold of the vehicle is increased, and the increased power battery charging cooling temperature threshold is not lower than the second safe charging cooling temperature threshold, wherein the power battery charging cooling threshold includes: a power battery charging cooling start temperature threshold and a power battery charging cooling end temperature threshold; For vehicles that are in both the fourth thermal management table and the sixth thermal management table and whose health status of the power battery is greater than the mileage life experience data, the power battery discharge cooling temperature threshold of the vehicle is increased, and the increased power battery discharge cooling temperature threshold is not lower than the second safe discharge cooling temperature threshold, wherein the power battery discharge cooling threshold includes: a power battery discharge cooling start temperature threshold and a power battery discharge cooling end temperature threshold; Among them, the second safe discharge cooling temperature threshold is greater than the second safe charging cooling temperature threshold; the power battery charging cooling start temperature threshold is greater than the power battery charging cooling termination temperature threshold; the power battery discharge cooling start temperature threshold is greater than the power battery discharge cooling termination temperature threshold; the mileage life experience data is the expected value of the ratio of the remaining life of the power battery to the rated life of the power battery corresponding to different vehicle mileages.

9. The battery thermal management method according to claim 5, characterized in that: The step of collecting statistics on the power battery operation data to obtain a plurality of thermal management tables for the power battery further includes: Obtaining the one-quarter quantile, two-quarter quantile, and three-quarter quantile of the target battery data within a value range for each vehicle in the vehicle sample set; Obtaining an interquartile range, where the interquartile range is equal to the difference between the third quartile and the fourth quartile; For any vehicle in the vehicle sample set, if the target battery data of the vehicle is less than the difference between the one-quarter quantile and N times the interquartile range, the vehicle is determined to be a low outlier; If the target battery data of the vehicle is greater than the sum of the third quartile and N times the interquartile range, the vehicle is determined to be a high outlier, where N is a positive number.

10. The battery thermal management method according to any one of claims 1 to 9, characterized in that: The sending the adjusted power battery cooling strategy to the vehicles in the vehicle sample set includes: When the accumulated mileage of the vehicles in the vehicle sample set reaches an initial mileage threshold, updating the power battery cooling strategy of the vehicles in the vehicle sample set; The updated power battery cooling strategy is issued to the vehicles in the vehicle sample set.

11. A battery thermal management method, characterized in that: Applied to a vehicle, the method comprises: Receiving an adjusted power battery cooling strategy sent by a server; the adjusted power battery cooling strategy is obtained after the server determines a vehicle sample set based on the accumulated mileage and accumulated days of use of multiple vehicles, and adjusts the power battery cooling strategies of the vehicles in the vehicle sample set according to the power battery operation data of the vehicles in the vehicle sample set; Battery thermal management is performed on the power battery of the vehicle based on the adjusted power battery cooling strategy.

12. A battery thermal management device, characterized in that: Applied to a server, the device comprises: A first acquisition module is used to acquire the cumulative mileage and cumulative use days of multiple vehicles; A determination module, configured to determine a vehicle sample set from the plurality of vehicles according to the accumulated mileage and accumulated usage days of the plurality of vehicles; A second acquisition module, used to acquire power battery operation data of vehicles in the vehicle sample set; An adjustment module, configured to adjust a power battery cooling strategy of a vehicle in the vehicle sample set according to the power battery operation data; A sending module is used to send the adjusted power battery cooling strategy to the vehicles in the vehicle sample set, so that the vehicles in the vehicle sample set perform battery thermal management on the power battery of the vehicle based on the adjusted power battery cooling strategy.

13. A battery thermal management device, characterized in that: Applied to a vehicle, the device comprises: A receiving module, configured to receive an adjusted power battery cooling strategy sent by a server; the adjusted power battery cooling strategy is obtained after the server determines a vehicle sample set based on the accumulated mileage and accumulated days of use of multiple vehicles, and adjusts the power battery cooling strategy of the vehicles in the vehicle sample set according to the power battery operation data of the vehicles in the vehicle sample set; A management module is used to perform battery thermal management on the power battery of the vehicle based on the adjusted power battery cooling strategy.

14. A server, characterized in that: include: processor; a memory for storing processor-executable instructions; The processor is configured to: execute the executable instructions to perform the method according to any one of claims 1 to 10.

15. A vehicle, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to: execute the executable instructions to perform the method of claim 11.

16. A computer-readable storage medium having computer program instructions stored thereon, characterized in that: When the program instructions are executed by a processor, the steps of the method described in any one of claims 1 to 10 are implemented, or the steps of the method described in claim 11 are implemented.

17. A chip, characterized in that: It comprises a processor and an interface; the processor is used to read instructions to execute the method described in any one of claims 1 to 10, or to execute the steps of the method described in claim 11.

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