A virtual and real life evaluation system for battery swap stations

Abstract

The present application relates to a virtual and real life assessment system for batteries in battery swap stations, comprising a number of electric vehicle modules, a number of battery modules and a number of battery swap station modules, wherein the said number of battery modules circulates among the said number of electric vehicle modules and the said number of battery swap station modules; it can record the actual battery trajectory and track the vehicle's power usage habits, and utilize a digital system to constrain the user's electric vehicle usage habits, effectively improve the battery life in the battery swap station system, and at the same time monitor the actual battery status to ensure the safety of batteries circulating in the battery swap station system.

Description

Technical Field

[0001] The present application relates to the application field of battery swap stations, and specifically to a battery life assessment system for battery swap stations. Background Art

[0002] Currently, electric vehicle batteries used in battery swap stations are either leased or purchased. This is due to the drawbacks of using battery swap stations to power electric vehicles: batteries are circulating, which means that the asset quality cannot be guaranteed. If users rent batteries, the operator will bear the cost of battery loss caused by some users' driving habits. If the operator increases the lease price due to battery loss, it will be disadvantageous to users with good driving habits. The increase in lease prices will also prevent the popularization of battery swap stations as a charging method for electric vehicles. If users purchase batteries, the circulating batteries vary, and the quality of the batteries cannot be guaranteed. If the battery fails during user use, the division of responsibility is unclear. If the battery failure cost is borne by the battery swap station, the cost of the battery swap station is too high. Therefore, developing a digital system that can record actual battery trajectory and track vehicle power usage habits can not only constrain user usage habits and effectively improve battery life, but also monitor the actual battery status and ensure the safety of batteries circulating in the battery swap station system. Summary of the Invention

[0003] A battery life assessment system for a battery swap station comprises a plurality of electric vehicle modules, a plurality of battery modules and a plurality of battery swap station modules, wherein the plurality of battery modules are circulated in the plurality of electric vehicle modules and the plurality of battery swap station modules; the electric vehicle module comprises an in-vehicle data operation memory, an in-vehicle power distribution system, an in-vehicle battery interface and an in-vehicle interface sensor; the battery module comprises a battery body; the battery swap station module comprises a plurality of in-station battery interfaces and an in-station power grid access module; in the electric vehicle module, one end of the in-vehicle battery interface is electrically connected to the battery body, and the other end is electrically connected to the in-vehicle power distribution system, and the in-vehicle interface sensor is arranged It is placed on the electrical link at one end of the in-vehicle battery interface and is used to collect battery information data of the battery body during operation in the vehicle. The in-vehicle data operation memory and the in-vehicle interface sensor are connected to the same information data link. The real-time values of the parameters of the corresponding life indicators are collected through the sensors, and the life indicator values are calculated and updated through the data operation memory; in the battery swap station module, one end of the in-station battery interface is electrically connected to the battery body, and the other end is electrically connected to the in-station power grid access module. One end of the in-station power grid access module is electrically connected to several in-station battery interfaces, and the other end is electrically connected to the power grid or generator.

[0004] The battery module also includes a battery data calculation memory, wherein the battery data calculation memory is connected to the same information data link as the in-vehicle data calculation memory and the in-vehicle interface sensor. The battery data calculation memory tracks the battery and records the real-time life indicators of the battery. The in-vehicle data calculation memory tracks the new energy vehicle and records the service life indicators of the vehicle.

[0005] The battery swap station module also includes an in-station data calculation memory, wherein the in-station data calculation memory and the battery data calculation memory are connected to the same information data link. The in-station data calculation memory synchronizes the real-time battery life indicators of all battery modules in the station stored in the corresponding battery data calculation memory, and determines whether the real-time battery life indicators are within the allowable range. If they are within the allowable range, the battery module continues to be put into use; if they are outside the allowable range, the battery module is retired.

[0006] The battery swap station module also includes an in-station life test unit, which is located in an independent area of the battery swap station module. It is a pre-unit in the process of the battery module entering the battery swap station module from the tram module. After the battery module is unloaded from the tram module, it first enters the in-station life test unit for a basic life test. The test results are used to determine whether the battery module is eliminated. The eliminated battery module is not connected to the in-station battery interface, and the non-eliminated battery module continues to be connected to the in-station battery interface.

[0007] The battery swap station module also includes several in-station interface current sensors and several in-station interface voltage sensors. The in-station interface current sensor and the in-station interface voltage sensor are arranged on the electrical link at one end of the in-station battery interface, and are used to collect the input current, input voltage and input power of the battery body during the charging process in the station; at the same time, the in-station interface current sensor, the in-station interface voltage sensor and the in-station data operation memory and the battery data operation memory are connected to the same information data link, and the real-time values of the parameters of the corresponding life indicators are collected through the sensors, and the life indicator values are calculated and updated through the data operation memory.

[0008] The in-vehicle interface sensor is specifically an in-vehicle interface current sensor and an in-vehicle interface voltage sensor.

[0009] The battery module also includes a battery temperature sensor, which is arranged on the battery body and is used to sense and monitor the battery temperature of the battery body during operation in the vehicle and charging in the station, providing the user with a basis for judging the battery usage status and the actual battery life value and indicator parameters; at the same time, the battery temperature sensor is connected to the same information data link as the in-vehicle data operation memory in the electric vehicle module, and the battery temperature sensor is connected to the same information data link as the in-station data operation memory in the battery swap station module.

[0010] The electric vehicle module also includes a motor speed sensor, which is arranged in the link of the in-vehicle power distribution system and is used to measure the user's start-stop habits and acceleration habits during the use of the electric vehicle, providing a basis for judging the user's battery usage status and indicator parameters.

[0011] A battery life assessment system for a battery swap station comprises a plurality of electric vehicle modules, a plurality of battery modules and a plurality of electric vehicle swap station modules, wherein the plurality of battery modules circulate in the plurality of electric vehicle modules and the plurality of electric vehicle swap station modules; the electric vehicle module comprises an in-vehicle power distribution system, an in-vehicle battery interface and an in-vehicle interface sensor; the battery module comprises a battery body and a battery data operation memory; the electric vehicle swap station module comprises a plurality of in-station battery interfaces, a plurality of in-station interface sensors, an in-station data operation memory and an in-station power grid access module; in the electric vehicle module, one end of the in-vehicle battery interface is electrically connected to the battery body, and the other end is electrically connected to the in-vehicle power distribution system; the in-vehicle interface sensor is arranged on the electrical link at one end of the in-vehicle battery interface, and is used to collect battery information data of the battery body during operation in the vehicle; the battery data operation memory and the in-vehicle interface sensor are connected to the same information data link, and the real-time values of the parameters of the corresponding life indicators are collected by the sensors, and the real-time life indicator values are calculated and updated by the data operation memory; in the battery swap station module In the station module, one end of the in-station battery interface is electrically connected to the battery body, and the other end is electrically connected to the in-station power grid access module. The in-station interface sensor is arranged on the electrical link at one end of the in-station battery interface, and is used to collect battery information data of the battery body during the charging process in the station; one end of the in-station power grid access module is electrically connected to several in-station battery interfaces, and the other end is electrically connected to the power grid or generator; wherein the in-station data operation memory, the battery data operation memory, and the in-station interface sensor are connected to the same information data link, and the real-time values of the parameters of the corresponding life indicators are collected by the sensors, and the life indicator values are calculated and updated by the data operation memory. The battery data operation memory tracks the battery and records the real-time life indicator of the battery. The in-station data operation memory synchronizes the real-time life indicator of the battery stored in the corresponding battery data operation memory of all battery modules in the station, and determines whether the real-time life indicator of the battery is within the allowed range. If it is within the allowed range, the battery module continues to be put into use; if it is outside the allowed range, the battery module is retired.

[0012] Beneficial effects

[0013] 1. Setting up a virtual life assessment system at a battery swap station can record the actual situation of battery use in new energy electric vehicles in real time, and record the corresponding virtual life as the battery life in the new energy electric vehicle, so as to solve the problem of accounting for the battery assets of each new energy electric vehicle when the battery circulates in different battery swap stations and different new energy vehicles; at the same time, under the virtual life index, indicators related to the real-time operating parameters of the battery in the vehicle can be set to conduct reverse assessment of new energy electric vehicle users, which is conducive to actively promoting users to use operations with lower battery loss during operation, extending the service life cycle of each circulating battery, and reducing the average operating cost of the battery swap station.

[0014] 2. Setting up an actual life assessment system for battery swap stations can record the life of batteries circulating in the battery swap stations in real time and monitor the real-time parameters of the batteries, effectively ensuring the reliability, safety and usability of batteries circulating in battery swap stations and electric vehicles, and timely eliminating unqualified batteries, which is beneficial to the stability and safety of the overall system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an example diagram of a first embodiment of a battery life assessment system for battery swap stations of the present application;

[0016] Figure 2 This is an example diagram of a second embodiment of a battery life assessment system for battery swap stations of the present application;

[0017] Figure 3 This is an example diagram of the third embodiment of a battery life assessment system for a battery swap station according to the present application. DETAILED DESCRIPTION

[0018] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0019] like Figure 1As shown, a first embodiment of a battery swap station battery life assessment system includes a plurality of electric vehicle modules 1, a plurality of battery modules 2, a plurality of battery swap station modules 3, and a power grid module 4, wherein the plurality of battery modules 2 circulates between the plurality of electric vehicle modules 1 and the plurality of battery swap station modules 3. The electric vehicle module 1 includes an in-vehicle data operation memory 132, an in-vehicle power distribution system 131, an in-vehicle battery interface 120, an in-vehicle interface current sensor 121, an in-vehicle interface voltage sensor 122, and further, a motor speed sensor 133; the battery module 2 includes a battery body 211, a battery temperature sensor 213, and a battery data operation memory 212; the battery swap station module 3 includes a plurality of in-station battery interfaces 320, a plurality of in-station interface current sensors 321, a plurality of in-station interface voltage sensors 322, an in-station data operation memory 330, and an in-station power grid access module 340. In the electric vehicle module 1, one end of the in-vehicle battery interface 120 is electrically connected to the battery body 211, and the other end is electrically connected to the in-vehicle power distribution system 131. The in-vehicle interface current sensor 121 and the in-vehicle interface voltage sensor 122 are arranged on the electrical link at one end of the in-vehicle battery interface 120, and are used to collect the output current, output voltage and output power of the battery body 211 during operation in the vehicle; the battery temperature sensor 213 is arranged on the battery body 211, and is used to sense and monitor the battery temperature of the battery body 211 during operation in the vehicle, providing a basis for judging the user's battery usage status and the actual battery life value and an indicator parameter; further, the motor speed sensor 133 is arranged in the link of the in-vehicle power distribution system 131, and is used to measure the user's start-stop habits and acceleration habits during the use of the electric vehicle, and provide a basis for judging the user's battery usage status and an indicator parameter. Among them, the battery data calculation memory 212, the in-vehicle data calculation memory 132, the in-vehicle interface current sensor 121, the in-vehicle interface voltage sensor 122, and the battery temperature sensor 213 may also include a motor speed sensor 133 connected to the same information data link, and the real-time values of the parameters of the corresponding life indicators are collected through the sensors, and the life indicator values are calculated and updated through the data calculation memory. The battery data calculation memory 212 tracks the battery and records the real-time life indicator of the battery. The in-vehicle data calculation memory 132 tracks the new energy vehicle and records the service life indicator of the vehicle. The service life indicator gradually decreases with the user's cumulative use, and the user purchases a certain amount of service life according to demand to increase the service life indicator.In the battery swap station module 3, one end of the in-station battery interface 320 is electrically connected to the battery body 211, and the other end is electrically connected to the in-station grid access module 340. The in-station interface current sensor 321 and the in-station interface voltage sensor 322 are arranged on the electrical link at one end of the in-station battery interface 320, and are used to collect the input current, input voltage and input power of the battery body 211 during the in-station charging process; the battery temperature sensor 213 is arranged on the battery body 211, and is used to sense and monitor the battery temperature of the battery body 211 during the in-station charging process, and provide a basis for judging and indicator parameters for the actual battery life value; one end of the in-station grid access module 340 is electrically connected to several in-station battery interfaces 320, and the other end is electrically connected to the grid module 4. Among them, the in-station data operation memory 330, battery data operation memory 212, in-station interface current sensor 321, in-station interface voltage sensor 322, and battery temperature sensor 213 are connected to the same information data link, and the real-time values of the parameters of the corresponding life indicators are collected through the sensors, and the life indicator values are calculated and updated through the data operation memory. The battery data operation memory 212 tracks the battery and records the real-time life indicator of the battery. The in-station data operation memory 330 synchronizes the battery modules in all stations with the real-time battery life indicator stored in the corresponding battery data operation memory, and determines whether the real-time battery life indicator is within the allowed range. If it is within the allowed range, the battery module continues to be put into use. If it is outside the allowed range, the battery module is retired.

[0020] Furthermore, if Figure 2As shown, a second embodiment of a battery swap station battery life assessment system includes a plurality of electric vehicle modules 5, a plurality of battery modules 6, a plurality of battery swap station modules 7, and a power grid module 8, wherein the plurality of battery modules 6 circulates between the plurality of electric vehicle modules 5 and the plurality of battery swap station modules 7. The electric vehicle module 5 includes an in-vehicle data operation memory 532, an in-vehicle power distribution system 531, an in-vehicle battery interface 520, an in-vehicle interface current sensor 521, an in-vehicle interface voltage sensor 522, and further, a motor speed sensor 533; the battery module 6 includes a battery body 611, a battery temperature sensor 613, and a battery data operation memory 612; the battery swap station module 7 includes a plurality of in-station battery interfaces 720, a plurality of in-station interface current sensors 721, a plurality of in-station interface voltage sensors 722, an in-station data operation memory 730, an in-station life test unit 750, and an in-station power grid access module 740. In the electric vehicle module 5, one end of the in-vehicle battery interface 520 is electrically connected to the battery body 611, and the other end is electrically connected to the in-vehicle power distribution system 531. The in-vehicle interface current sensor 521 and the in-vehicle interface voltage sensor 522 are arranged on the electrical link at one end of the in-vehicle battery interface 520, and are used to collect the output current, output voltage and output power of the battery body 611 during operation in the vehicle; the battery temperature sensor 613 is arranged on the battery body 611, and is used to sense and monitor the battery temperature of the battery body 611 during operation in the vehicle, providing a basis for judging the user's battery usage status and the actual battery life value and an indicator parameter; further, the motor speed sensor 533 is arranged in the link of the in-vehicle power distribution system 531, and is used to measure the user's start-stop habits and acceleration habits during the use of the electric vehicle, and provide a basis for judging the user's battery usage status and an indicator parameter. Among them, the battery data operation memory 612, the in-vehicle data operation memory 532, the in-vehicle interface current sensor 521, the in-vehicle interface voltage sensor 522, and the battery temperature sensor 613 may also include a motor speed sensor 533 connected to the same information data link, and the real-time values of the parameters of the corresponding life indicators are collected through the sensors, and the life indicator values are calculated and updated through the data operation memory. The battery data operation memory 612 tracks the battery and records the real-time life indicator of the battery, and the in-vehicle data operation memory 532 tracks the new energy vehicle and records the service life indicator of the vehicle. The service life indicator gradually decreases with the user's cumulative use, and the user purchases a certain amount of service life according to demand to increase the service life indicator.In the battery swap station module 7, one end of the in-station battery interface 720 is electrically connected to the battery body 611, and the other end is electrically connected to the in-station grid access module 740. The in-station interface current sensor 721 and the in-station interface voltage sensor 722 are arranged on the electrical link at one end of the in-station battery interface 720, and are used to collect the input current, input voltage and input power of the battery body 611 during the in-station charging process; the battery temperature sensor 613 is arranged on the battery body 611, and is used to sense and monitor the battery temperature of the battery body 611 during the in-station charging process, and provide a basis for judging and indicator parameters for the actual battery life value; one end of the in-station grid access module 740 is connected to several in-station batteries. The interface 720 is electrically connected, and the other end is electrically connected to the power grid module 8; the in-station life test unit 750 is located in an independent area of the battery swap station module 7, and is a pre-unit in the process of the battery module 6 entering the battery swap station module 7 from the tram module 5. After the battery module 6 is unloaded from the tram module 5, it first enters the in-station life test unit 750 for a basic life test, and calculates the real-time life of the battery in the battery data operation memory 612. If there is a large deviation between the test result of the test unit and the monitored real-time life of the battery, the test result shall prevail. If the test result does not meet the requirements, the battery module 6 is eliminated and not connected to the in-station battery interface 720. If the test result meets the requirements, the battery module 6 continues to be used and is connected to the in-station battery interface 720. Among them, the in-station data operation memory 730, battery data operation memory 612, in-station interface current sensor 721, in-station interface voltage sensor 722, and battery temperature sensor 613 are connected to the same information data link, and the real-time values of the parameters of the corresponding life indicators are collected through the sensors, and the life indicator values are calculated and updated through the data operation memory. The battery data operation memory 612 tracks the battery and records the real-time life indicator of the battery. The in-station data operation memory 730 synchronizes the battery real-time life indicator of all battery modules in the station stored in the corresponding battery data operation memory, and determines whether the battery real-time life indicator is within the allowed range. If it is within the allowed range, the battery module continues to be put into use, and if it is outside the allowed range, the battery module is retired.

[0021] Among them, Figure 3As shown, a third embodiment of a battery swap station battery virtual life assessment system includes a number of electric vehicle modules 9, a number of battery modules 10, a number of battery swap station modules 11 and a power grid module 12, wherein the number of battery modules 10 circulates between the number of electric vehicle modules 9 and the number of battery swap station modules 11. The electric vehicle module 9 includes an in-vehicle data operation memory 932, an in-vehicle power distribution system 931, an in-vehicle battery interface 920, an in-vehicle interface current sensor 921, an in-vehicle interface voltage sensor 922, and further, a motor speed sensor 933; the battery module 10 includes a battery body 1011 and a battery temperature sensor 1013; the battery swap station module 11 includes a number of in-station battery interfaces 1120, an in-station life test unit 1150 and an in-station power grid access module 1140. In the electric vehicle module 9, one end of the in-vehicle battery interface 920 is electrically connected to the battery body 1011, and the other end is electrically connected to the in-vehicle power distribution system 931. The in-vehicle interface current sensor 921 and the in-vehicle interface voltage sensor 922 are arranged on the electrical link at one end of the in-vehicle battery interface 920, and are used to collect the output current, output voltage and output power of the battery body 1011 during operation in the vehicle; the battery temperature sensor 1013 is arranged on the battery body 1011, and is used to sense and monitor the battery temperature of the battery body 1011 during operation in the vehicle, and provide a basis for judging the battery usage status and indicator parameters for the user; further, the motor speed sensor 933 is arranged in the link of the in-vehicle power distribution system 931, and is used to measure the user's start-stop habits and acceleration habits during the use of the electric vehicle, and provide a basis for judging the battery usage status and indicator parameters for the user. Among them, the in-vehicle data operation memory 932, the in-vehicle interface current sensor 921, the in-vehicle interface voltage sensor 922, the battery temperature sensor 1013, and the motor speed sensor 933 may also be connected to the same information data link, and the real-time values of the parameters of the corresponding life indicators are collected through the sensors, and the life indicator values are calculated and updated through the data operation memory. The in-vehicle data operation memory 932 tracks the new energy vehicle and records the service life indicator of the vehicle. The service life indicator gradually decreases with the user's cumulative use, and the user purchases a certain amount of service life according to demand to increase the service life indicator.In the battery swap station module 11, one end of the in-station battery interface 1120 is electrically connected to the battery body 1011, and the other end is electrically connected to the in-station power grid access module 1140. One end of the in-station power grid access module 1140 is electrically connected to several in-station battery interfaces 1120, and the other end is electrically connected to the power grid module 12; the in-station life test unit 1150 is located in an independent area of the battery swap station module 11, and is a pre-unit in the process of the battery module 10 entering the battery swap station module 11 from the tram module 9. After the battery module 10 is unloaded from the tram module 9, it first enters the in-station life test unit 1150 for a basic life test. If the test result does not meet the requirements, the battery module 10 is eliminated and not connected to the in-station battery interface 1120. If the test result meets the requirements, the battery module 10 continues to be used and connected to the in-station battery interface 1120.

[0022] The grid access module may specifically include: an electric energy metering device, a controllable switch, and a bidirectional electric quantity conversion device.

[0023] A method for evaluating the virtual and real life of batteries in a battery swap station system can be specifically divided into a method for evaluating the virtual life of batteries in a battery swap station system, a method for evaluating the actual life of batteries in a battery swap station system, a method for calling and storing the virtual and real life of batteries in a battery swap station system, and a method for applying the virtual and real life of batteries in a battery swap station system. The virtual life evaluation is mainly used for battery swap settlement with new energy vehicle users, and the actual life evaluation is mainly used as a basis for judging whether the batteries in the battery swap station have been eliminated by the overall battery swap system.

[0024] The battery virtual life assessment method for the battery swap station system includes the following steps:

[0025] S1. Obtain the operating status parameters of the battery in the vehicle based on the sensors in the battery module and the electric vehicle module, transmit the real-time values of the operating status parameters to the in-vehicle data operation memory through communication between the sensors and the in-vehicle data operation memory, calculate the value of the battery virtual life indicator through the in-vehicle data operation memory, and store the calculated value in the in-vehicle data operation memory.

[0026] The actual life evaluation method of the battery swap station system includes the following steps:

[0027] S2. In the new energy vehicle, the operating status parameters of the battery in the vehicle are obtained based on the sensors in the battery module and the electric vehicle module, and the real-time values of the operating status parameters are transmitted to the battery data operation memory through the communication between the sensors and the battery data operation memory. The value of the actual life index consumed by the battery in the vehicle is calculated through the battery data operation memory, and the calculated value is stored in the battery data operation memory; in the battery swap station, the charging status parameters of the battery in the station are obtained based on the sensors in the battery module and the battery swap station module. The real-time values of the charging status parameters are transmitted to the battery data operation memory through the communication between the sensors and the battery data operation memory. The value of the actual life index consumed by the battery in the station is calculated through the battery data operation memory, and the calculated value is stored in the battery data operation memory.

[0028] The method for calling and storing the virtual and real life of batteries in the battery swap station system includes the following steps:

[0029] S3. Before the battery module is detached from the tram module, the actual battery life indicator of the battery module and the virtual battery life indicator of the tram module are synchronized with the battery life value consumed during the operation cycle of the tram and the final actual battery life indicator is stored in the battery data operation memory, and the final virtual battery life indicator is stored in the vehicle data operation memory;

[0030] S4. Before the battery module is connected to the battery swap station module, the latest actual battery life indicator stored in the battery data operation memory of the battery module is transmitted to the in-station data operation memory of the battery swap station module via communication; after the battery module completes charging, the actual battery life indicator is updated and transmitted to the in-station data operation memory of the battery swap station module via communication.

[0031] The above-mentioned method for calling and storing the virtual and real life of batteries in the battery swap station system only provides one way to call and store virtual and real life data. It is not limited to this method, and the calling and storage of virtual and real life data can also be set at different time nodes.

[0032] The application method of the battery lifespan in the battery swap station system includes the following steps:

[0033] S5. In the tram, when the virtual life indicator of the battery in the tram module decreases to 0, it means that the service life of the battery purchased by the user has expired. The subsequent use fee of the battery connected to the battery swap station is determined based on the user's actual choice;

[0034] S6. In a battery swap station, when the actual battery life indicator of a battery module is determined by the data operation memory in the station to be less than the actual battery life threshold allowed in the battery swap station system, the battery module will be discarded, recycled or enter the next battery system through the elimination process.

[0035] The method of obtaining the operating status parameters of the battery in the vehicle according to the sensors in the battery module and the electric vehicle module in S1 may specifically be:

[0036] S1001. Obtain real-time output current i through the in-vehicle interface current sensor and in-vehicle interface voltage sensor car , real-time output voltage u car , and calculate the real-time battery output power P car .

[0037] Furthermore, the battery operating status perception is completed by obtaining other dimensional parameters in addition to the power parameters, which can be specifically:

[0038] S1002. Obtain the real-time operating temperature T of the battery body through the battery temperature sensor battery , obtain the real-time running speed v of the tram through the motor speed sensor car , and calculate the real-time acceleration a of the tram car .

[0039] Among them, the battery virtual life indicator LT described in S1 Vir-batt The specific calculation formula can be:

[0040]

[0041] Among them, LT0 is the factory life of the battery used in the electric vehicle, LT unit is the life of a fully charged battery in one cycle of the electric vehicle, ε cor-i is the correction parameter calculated by the electric vehicle according to the real-time operating status parameters during the i-th battery use cycle, and d is the number of times the electric vehicle has used the battery. unit To set constant values, LT0 and LT unit Generally, the following relationship is satisfied: Here, n can be the number of charge and discharge cycles of the battery used in the electric vehicle, and can also be set manually and adjusted accordingly according to demand.

[0042] Among them, the correction parameter ε cor-i The specific calculation formula can be:

[0043]

[0044] Among them, ε0, ε ele , ε tep , ε spe They are all set constant values, usually ε0 is 1, ε ele , ε tep , ε speThey are respectively the influencing parameters of battery output power and related values on battery life, the influencing parameters of battery operating temperature and related values on battery life, and the influencing parameters of motor speed generated by battery output and related values on battery life, which are determined by big data or experts or obtained through experimental tests; α1, α2, and α3 are respectively the manually set weights of battery output power and related values on battery life, the weights of battery operating temperature and related values on battery life, and the weights of motor speed generated by battery output and related values on battery life; α1, α2, and α3 can all be adjusted to 0 according to manual settings, that is, the parameter is not used as a parameter affecting the battery virtual life index, and the degree of loss is negligible.

[0045] The power index t i-1 The specific calculation process can be:

[0046] S1011. Calculate the real-time battery output power P car Perform differentiation to obtain the real-time battery power change rate;

[0047] S1012. Count the number of times the real-time battery power change rate of the electric vehicle exceeds the set threshold during the i-th battery use cycle. This number is the power index t i-1 The numerical value of .

[0048] The temperature index t i-2 The specific calculation process can be:

[0049] S1021. According to the real-time operating temperature curve T of the battery body battery , statistics of the operating temperature T of the electric vehicle during the i-th battery life cycle battery Nodes exceeding the set threshold;

[0050] S1022. Statistical operation temperature T based on the above nodes battery The crossing time of the limit is counted, and the number of nodes whose crossing time exceeds the set threshold is counted. The number of nodes is the temperature index t i-2 The numerical value of .

[0051] The speed index t i-3 The specific calculation process can be:

[0052] S1031. Obtain the real-time running speed v of the tram car Differentiate and get the real-time acceleration a of the tram car ;

[0053] S1032. Count the real-time acceleration a of the tram during the i-th battery life cycle. car The number of times the speed exceeds the set threshold is the speed index t i-3 The numerical value of .

[0054] Furthermore, since the actual battery life indicator involves the safety of the battery replacement system and the data in the computing memory may have errors, an on-site life test unit is set up to complete the verification step of the actual life indicator.

[0055] Furthermore, it is also possible to only set up an in-station life test unit to complete the measurement of the actual battery life index without performing the data collection, storage, communication and call steps of the actual battery life index.

[0056] Furthermore, in order to save system computing space, the data transmitted to the computing memory via the sensor can be first stored in the computing memory as original data, and relevant calculations can be performed when relevant indicators need to be used or transmitted.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0058] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery life assessment system for battery swap stations, characterized in that: It includes several electric vehicle modules, several battery modules and several battery swap station modules, wherein the several battery modules circulate among the several electric vehicle modules and the several battery swap station modules; the electric vehicle module includes an in-vehicle data operation memory, an in-vehicle power distribution system, an in-vehicle battery interface, and an in-vehicle interface sensor; the battery module includes a battery body; the battery swap station module includes several in-station battery interfaces and an in-station power grid access module; In the electric vehicle module, one end of the in-vehicle battery interface is electrically connected to the battery body, and the other end is electrically connected to the in-vehicle power distribution system. The in-vehicle interface sensor is arranged on the electrical link at one end of the in-vehicle battery interface, and is used to collect battery information data of the battery body during operation in the vehicle. The in-vehicle data operation memory and the in-vehicle interface sensor are connected to the same information data link, and the real-time values of the parameters of the corresponding life indicators are collected through the sensors, and the life indicator values are calculated and updated through the data operation memory; in the battery swap station module, one end of the in-station battery interface is electrically connected to the battery body, and the other end is electrically connected to the in-station power grid access module. One end of the in-station power grid access module is electrically connected to several in-station battery interfaces. The battery module further comprises a battery data operation memory, wherein the battery data operation memory is connected to the same information data link as the in-vehicle data operation memory and the in-vehicle interface sensor, the battery data operation memory tracks the battery and records the real-time life index of the battery, and the in-vehicle data operation memory tracks the new energy vehicle and records the service life index of the battery of the vehicle; the operating status parameters of the battery in the vehicle are obtained according to the sensors in the battery module and the electric vehicle module, the real-time quantity of the operating status parameters is transmitted to the in-vehicle data operation memory through the communication between the sensor and the in-vehicle data operation memory, the value of the battery virtual life index is calculated by the in-vehicle data operation memory, and the calculated value is stored in the in-vehicle data operation memory.

2. The battery life assessment system for battery swap stations according to claim 1, characterized in that: The battery swap station module also includes an in-station data calculation memory, wherein the in-station data calculation memory and the battery data calculation memory are connected to the same information data link. The in-station data calculation memory synchronizes the real-time battery life indicators of all battery modules in the station stored in the corresponding battery data calculation memory, and determines whether the real-time battery life indicators are within the allowable range. If they are within the allowable range, the battery module continues to be put into use; if they are outside the allowable range, the battery module is retired.

3. The battery life assessment system for battery swap stations according to claim 1 or 2, characterized in that: The battery swap station module also includes an in-station life test unit, which is located in an independent area of the battery swap station module. It is a pre-unit in the process of the battery module entering the battery swap station module from the tram module. After the battery module is unloaded from the tram module, it first enters the in-station life test unit for a basic life test. The test results are used to determine whether the battery module is eliminated. The eliminated battery module is not connected to the in-station battery interface, and the non-eliminated battery module continues to be connected to the in-station battery interface.

4. The battery life assessment system for battery swap stations according to claim 2, characterized in that: The battery swap station module also includes several in-station interface current sensors and several in-station interface voltage sensors. The in-station interface current sensor and the in-station interface voltage sensor are arranged on the electrical link at one end of the in-station battery interface, and are used to collect the input current, input voltage and input power of the battery body during the charging process in the station; at the same time, the in-station interface current sensor, the in-station interface voltage sensor and the in-station data operation memory and the battery data operation memory are connected to the same information data link, and the real-time values of the parameters of the corresponding life indicators are collected through the sensors, and the life indicator values are calculated and updated through the data operation memory.

5. The battery life assessment system for battery swap stations according to claim 1, characterized in that: The in-vehicle interface sensor is specifically an in-vehicle interface current sensor and an in-vehicle interface voltage sensor.

6. The battery life assessment system for battery swap stations according to claim 1, 2 or 4, characterized in that: The battery module also includes a battery temperature sensor, which is arranged on the battery body and is used to sense and monitor the battery temperature of the battery body during operation in the vehicle and charging in the station, providing the user with a basis for judging the battery usage status and the actual battery life value and indicator parameters; at the same time, the battery temperature sensor is connected to the same information data link as the in-vehicle data operation memory in the electric vehicle module, and the battery temperature sensor is connected to the same information data link as the in-station data operation memory in the battery swap station module.

7. The battery life assessment system for battery swap stations according to claim 1, 2 or 4, characterized in that: The electric vehicle module also includes a motor speed sensor, which is arranged in the link of the in-vehicle power distribution system and is used to measure the user's start-stop habits and acceleration habits during the use of the electric vehicle, providing a basis for judging the user's battery usage status and indicator parameters.

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