CN112198441B - Method and system for estimating battery charging remaining time - Google Patents
Method and system for estimating battery charging remaining time Download PDFInfo
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- CN112198441B CN112198441B CN202010112448.8A CN202010112448A CN112198441B CN 112198441 B CN112198441 B CN 112198441B CN 202010112448 A CN202010112448 A CN 202010112448A CN 112198441 B CN112198441 B CN 112198441B
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Abstract
The embodiment of the invention provides a battery charging remaining time estimation method, which is applied to a battery management system, wherein the battery management system stores an initial data table for estimating battery charging time, and the method comprises the following steps: estimating charging time data of the battery according to the stored initial data table, and sending the charging time data, parameter information which is acquired under different environments and influences the charging time of the battery and actual charging state information of the battery to a background server; receiving a new data table sent by the background server, wherein the new data table is established by updating an initial data table by the background server according to the charging time data, the parameter information and the actual charging state information; replacing the stored initial data table with a new data table; and estimating the battery charging remaining time according to the new data table and the current parameter information. The invention can effectively improve the estimation accuracy and reduce the operation load of the battery management system.
Description
Technical Field
The invention relates to the technical field of electric vehicle charging, in particular to a battery charging remaining time estimation method and a battery charging remaining time estimation system.
Background
With the enhancement of low-carbon environmental protection consciousness of the public, electric automobiles start to develop vigorously. Electric vehicles are usually charged by using public charging piles, and how to accurately obtain the idle time of the public charging piles and how to reasonably distribute and schedule the public charging piles is a problem at present. The charging residual time of the charging vehicle is accurately estimated, so that the charging waiting time of a vehicle owner can be shortened, and the resource of the charging pile can be conveniently arranged and scheduled in advance.
The method for calculating the charging remaining time in the prior art comprises the following two methods: one method is to divide the remaining uncharged charge by the current real-time current, i.e., (full charge SOC-current SOC) ×the nominal capacity of the cell/current real-time current, to obtain the charge remaining time. The other method is to process the charging process in a segmented way, accumulate and calculate the charging time of each stage to obtain the whole charging time, and subtract the current charged time from the whole charging time to obtain the residual charging time. The formula for calculating the overall charging time is: charge remaining time = time of charge phase 1 + time of charge phase 2 +.+ time of charge phase N, where charge phase N is a custom phase division within the algorithm, the value of N is determined by the algorithm. The calculation parameters used by the two methods are fixed, the individual difference cannot be solved, the estimated result has large fluctuation and frequent fluctuation, and the estimated final result has larger deviation. The whole process of estimating the remaining charge time is completed by a battery management system (Battery Management System, BMS) of the electric vehicle, and the battery management system BMS needs to collect and process a large amount of other data, so that the calculation capacity is limited, compatibility cannot be achieved on the aspects of estimation precision and data calculation amount, and the remaining charge time of the vehicle battery cannot be accurately calculated.
Disclosure of Invention
The embodiment of the invention aims to provide a method and a system for estimating the remaining charge time of a battery so as to accurately calculate the remaining charge time of the battery.
In order to achieve the above object, a first aspect of the present invention provides a battery charge remaining time estimation method applied to a battery management system storing an initial data table for estimating a battery charge time, the method comprising:
s1) estimating charging time data of a battery according to the stored initial data table, and sending the charging time data, parameter information which is acquired under different environments and influences the charging time of the battery and actual charging state information of the battery to a background server, wherein the background server stores the initial data table;
s2) receiving a new data table sent by the background server, wherein the new data table is established by the background server by updating the initial data table according to the received charging time data, the parameter information and the actual charging state information;
s3) replacing the stored initial data table with the new data table;
s4) estimating the battery charging remaining time according to the new data table and the current parameter information affecting the battery charging time.
Further, the background server sends the new data table under the condition that the error between the received charging time data and the corresponding charging time data in the new data table exceeds a preset error range.
Further, the parameter information affecting the battery charging time includes: initial cell temperature and initial cell voltage of the battery.
Further, the new data table includes: a charging current map, a charging time map, and a battery heating time map.
Further, the charging time data includes: heating time corresponding to different initial cell temperatures, and charging time corresponding to different cell temperature intervals and different cell voltage intervals.
Further, step S4) estimates the remaining battery charging time according to the new data table and the current parameter information affecting the battery charging time, including:
s41) acquiring the cell temperature and the cell voltage of the battery in real time;
s42) obtaining charge accumulation time of each stage of charge according to the battery cell temperature and battery cell voltage, the charge current mapping table and the charge time comparison table;
s43) estimating the time for the battery to reach the full charge state according to the charge accumulation time of each charging stage;
s44) calculating an accumulated charged time according to the current charge current and the current SOC value, and subtracting the accumulated charged time from the time to reach the full charge state to obtain the battery charge remaining time.
Further, step S41) acquires the cell temperature and the cell voltage of the battery in real time, and further includes:
judging whether the battery needs to be heated according to the initial cell temperature of the battery, if so, determining the battery heating time according to the battery heating schedule.
Further, step S42) obtains a charge accumulated time of each stage of charging according to the cell temperature and the cell voltage, the charge current map and the charge time map, including:
determining the maximum charging current corresponding to different battery cell temperature intervals and different battery cell voltage intervals in each charging stage according to the charging current mapping table and the battery cell temperature and the battery cell voltage acquired in real time;
and determining the charging time required by charging by adopting the corresponding maximum charging current at each charging stage according to the charging time comparison table.
Further, the time to reach the full charge state in step S43) includes: the charging accumulation time of each charging stage, the battery heating time and the cut-off charging time, wherein the cut-off charging time is the charging holding time when the battery cell voltage is close to the full charging voltage in the charging process.
A second aspect of the present invention provides a battery charge remaining time estimation system, the system comprising:
the battery management system is used for estimating the charging time data of the battery according to a stored initial data table for estimating the charging time of the battery, collecting parameter information influencing the charging time of the battery and actual charging state information of the battery under different environments, and sending the charging time data, the parameter information and the actual charging state information to a background server;
the background server is used for updating the stored initial data table for estimating the battery charging time according to the received charging time data, the parameter information and the actual charging state information to establish a new data table, and sending the new data table to the battery management system;
the battery management system is further configured to replace the stored initial data table with the new data table, and estimate a battery charging remaining time according to the new data table and current parameter information affecting the battery charging time.
Further, the system further comprises:
and the communication device is in communication connection with the battery management system and the background server and is used for transmitting the charging time data, the parameter information and the actual charging state information which are transmitted to the battery management system to the background server and transmitting the new data table transmitted from the background server to the battery management system.
Further, the background server is configured to send the new data table under a condition that an error between the received charging time data and corresponding charging time data in the new data table exceeds a preset error range.
According to the embodiment of the invention, the background server is used for carrying out statistics and analysis on the parameter information and the actual charging state information which influence the charging time of the battery, and optimizing and updating the related charging parameters. The background server obtains a more complete and accurate new data table for estimating the battery charging time through carrying out statistical analysis on the big data, and issues the new data table to the battery management system BMS, and the battery management system BMS estimates the battery charging remaining time according to the new data table, and the estimation accuracy is effectively improved through the big data of the background server. The accurate charging estimated time is provided in the charging process of the electric vehicle, so that the resources of the charging pile are reasonably arranged, and the service efficiency of the charging pile is improved; the vehicle taking time is reasonably arranged by a vehicle owner, and the waiting time on a charging site is reduced.
On the other hand, statistics and arrangement of the battery charging related parameter data are processed by a background server with stronger computing capacity, and the battery management system BMS estimates the charging remaining time according to the actual charging condition by using the parameter data processed by the background server, so that the data calculation amount and the data storage amount of the BMS are reduced, and the computing load of the BMS is effectively reduced.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain, without limitation, the embodiments of the invention. In the drawings:
fig. 1 is a flowchart of a battery charge remaining time estimation method according to an embodiment of the present invention;
FIG. 2 is a flowchart of a battery management system estimating a battery charge remaining time in a battery charge remaining time estimating method according to an embodiment of the present invention;
fig. 3 is a block diagram of a battery charge remaining time estimation system provided in one embodiment of the present invention.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
Fig. 1 is a flowchart of a battery charge remaining time estimation method according to an embodiment of the present invention. As shown in fig. 1, an embodiment of the present invention provides a battery charge remaining time estimation method applied to a battery management system storing an initial data table for estimating a battery charge time, the method comprising:
s1) estimating charging time data of a battery according to the stored initial data table, and sending the charging time data, parameter information which is collected under different environments and influences the charging time of the battery and actual charging state information of the battery to a background server, wherein the background server stores the initial data table.
The initial data table in the battery management system is the same as the initial data table in the background server. In each charging process, the battery management system estimates charging time according to battery parameters and an initial data table in the current environment, and sends the charging time data to a background server.
And the background server sends the new data table under the condition that the error of the received charging time data and the corresponding charging time data in the new data table exceeds a preset error range.
The parameter information affecting the battery charging time includes the initial cell temperature and initial cell voltage of the battery, and the maximum allowable current of the charger. In this embodiment, the battery management systems BMSs of different vehicles in different environments communicate with each other with the background server, and the different battery management systems BMSs transmit the initial cell temperature, the initial cell voltage, and the actual charge state information of different environments to the background server.
The actual state of charge information includes battery heating time, charging time at each stage in the charging process, off-charging time, and actual full charge time. The battery heating time refers to the time required to heat the battery above a critical temperature (e.g., 0 ℃) when the ambient temperature at which the battery is located is below the critical temperature (the battery needs to be recharged after being heated). If the battery charging process is divided into different stages, the different stages correspond to different voltage intervals, and the charging time of each stage in the charging process refers to the time corresponding to the battery cell in the different voltage intervals. The off-charge time refers to the charge retention time when the cell voltage approaches the full charge voltage during charging. For example, the cell voltage when the battery is full is 4.13V, and the cell voltage reaches 4.13V after a longer charging time after charging to 4.12V, and the time from 4.12V to 4.13V is the off-charging time. The actual full charge time refers to the total time of a single charging process, i.e., battery heating time + charging time at each stage of the charging process + off-charging time.
S2) receiving a new data table sent by the background server, wherein the new data table is established by the background server for updating the initial data table according to the received charging time data, the parameter information and the actual charging state information.
And the background server receives the charging time data sent by the battery management system, compares the charging time data with corresponding data in the new data table, judges whether the errors of the charging time data and the corresponding data exceed a preset error range, and if so, sends the new data table to the battery management system.
The charging time data comprises heating time corresponding to different initial cell temperatures and charging time corresponding to different cell temperature intervals and different cell voltage intervals.
The background server can receive data which are sent by a plurality of Battery Management Systems (BMS) in different environments and used for estimating the battery charging time, establish big data, count the battery cell temperature, the battery cell voltage in different environments and the actual charging state information in different environments, and analyze relevant parameters affecting the battery charging time. The background server stores an initial data table for estimating the charging time of the battery, and when the background server analyzes that the change of the related parameters affecting the charging time exceeds a preset change range, the related parameters in the initial data table are replaced by new parameters or new parameters are added into the initial data table, the initial data table is updated, and a new data table is established. The data table can be updated in real time or periodically. The background server obtains a new data table which is more complete and accurate and used for estimating the battery charging time through carrying out statistical analysis on the big data.
S3) replacing the stored initial data table with the new data table.
The new data table comprises a charging current mapping table Tab 0 Charging temperature rise meter Tab 1 Charging time table Tab 2 Battery heating schedule Tab 3 。
Charging current map Tab 0 Examples are as follows:
the rows and columns of the header represent the cell temperature interval and the cell voltage interval, respectively, and the data in the table represent the maximum charging current I corresponding to the cell temperature interval and the cell voltage interval in a. For example, when the cell temperature-20 < = T <0 ℃, and the cell voltage of 1.5V < = 3.3V, the maximum charging current i=50a.
Charging temperature rise meter Tab 1 Examples are as follows:
row and column of headersThe columns respectively represent a battery cell temperature interval and a battery cell voltage interval, and the data in the table are expressed in the corresponding battery cell temperature interval by using Tab 0 Corresponding to the maximum charging current I charged to the temperature rise value Tep corresponding to different cell voltages rise The units are in degrees Celsius. For example, when T<At the temperature of 20 ℃ below zero, the battery cell is too low to allow charging, and the temperature rise value is 0; when T= -20 ℃, according to Tab 0 Charging with medium current i=50a, and increasing the voltage of the single battery cell from 1.5V to a temperature rise value Tep corresponding to 3.3V rise =1 ℃; when T= -20 ℃, according to Tab 0 Charging with medium current i=60deg.a, and increasing the voltage of the single cell from 3.3V to 3.6V rise =2 ℃; when T= -15 ℃, according to Tab 0 Charging with medium current i=60deg.A, increasing the voltage of the single cell from 3.3V to 3.6V, and performing linear interpolation to obtain a voltage with a temperature range of-20 deg.F<＝T<Linear interpolation calculation is carried out on the temperature rise value at 0 ℃ to obtain a corresponding temperature rise value Tep rise ＝2℃。
Charging time comparison table Tab 2 Examples are as follows:
the rows and columns of the table head respectively represent a battery cell temperature interval and a battery cell voltage interval, and the data in the table are expressed in the corresponding battery cell temperature interval and are obtained by adopting Tab 0 The charging time in minutes required to charge the corresponding maximum charging current I to the different cell voltages. For example: when-20<＝T<At 0℃according to Tab 0 Medium current i=60A charge, the charge time required for the cell voltage to rise from 3.3V to 3.6V is 20 minutes; when T= -15 ℃, according to Tab 0 Charging with medium current i=60deg.A, increasing the voltage of the single cell from 3.3V to 3.6V, and performing linear interpolation to obtain a voltage with a temperature range of-20 deg.F<＝T<And (3) carrying out linear interpolation calculation on the charging time value at the temperature of 0 ℃ to obtain the corresponding charging time of 20 minutes.
Battery heating schedule Tab 3 Examples are as follows:
| T＝-30℃ | T＝-25℃ | T＝-20℃ | T＝-15℃ | T＝-10℃ | T＝-5℃ |
| 60 | 50 | 45 | 30 | 15 | 5 |
Tab 3 representing the time required to heat the battery cells to 0 c (where charging can be performed) at different ambient temperatures, for example, 45 minutes are required to heat the battery cells to 0 c when the ambient temperature T = -20 c.
S4) estimating the battery charging remaining time according to the new data table and the current parameter information affecting the battery charging time.
Fig. 2 is a flowchart of a battery management system estimating a battery charge remaining time in a battery charge remaining time estimating method according to an embodiment of the present invention. As shown in fig. 2, the method for estimating the remaining battery charge time according to the present embodiment includes the following steps:
s41) collecting the cell temperature and the cell voltage in real time.
When the battery is at an ambient temperature lower than the critical temperature (e.g., 0 ℃), the battery cannot be directly usedCharging requires heating the battery above a critical temperature. When charging is started, judging whether the battery needs to be heated according to the initial cell temperature of the battery, if so, determining the battery heating time table Tab according to the battery heating time table Tab 3 Determining battery heating time T 2 。
S42) obtaining the charge accumulation time of each stage of charge according to the battery cell temperature and the battery cell voltage, the charge current mapping table and the charge time comparison table.
According to the charging current mapping table Tab 0 The battery cell temperature and the battery cell voltage are collected in real time, and the maximum charging current I corresponding to different battery cell temperature intervals and different battery cell voltage intervals in each charging stage is determined; according to the charging time comparison table Tab 2 Determining a charging time T required for charging by using a corresponding maximum charging current I at each charging stage 1temp Charging time T of each charging stage 1temp Accumulating to obtain the charge accumulated time T 1 . For example, the charging process is divided into four stages of 0-1.5V, 1.5-3.3V, 3.3-3.6V, and 3.6-4.13V, and the charging time is T 1temp1 、T 1temp2 、T 1temp3 、T 1temp4 Charge accumulation time T of each stage of charge 1 ＝T 1temp1 +T 1temp2 +T 1temp3 +T 1temp4 。
Considering the influence of the temperature rise of the battery cell on the charging time in the charging process, according to the charging temperature rise table Tab 1 Determining a temperature rise value Tep corresponding to the charging of each charging stage by adopting a corresponding maximum charging current I rise Judging the temperature rise value Tep rise Whether the current temperature interval end value is exceeded or not, if yes, according to the charging time comparison table Tab 2 Obtaining charging time T corresponding to the current temperature interval by adopting a linear interpolation method 1temp . If not, according to the charging schedule Tab 2 Determining corresponding charging time T through current cell voltage interval and current temperature interval 1temp 。
S43) estimating the time when the battery reaches the full charge state based on the charge accumulation time at each stage of charging.
Time T for the battery to reach full charge state sum Charge accumulation time T including charge stages 1 Time T of battery heating 2 And off-charge time T 3 T, i.e sum ＝T 1 +T 2 +T 3 . The off-charging time T 3 Refers to the charge retention time when the battery cell voltage is close to the full charge voltage in the charging process, and can be according to the charge time comparison table Tab 2 Obtaining the off-charge time T 3 For example, tab 2 And the time corresponding to the middle cell voltage U is more than 4.13V.
S44) calculating an accumulated charged time T according to the present charge current and the present SOC value charge Time T for reaching full charge state of battery sum Subtracting the accumulated charged time T charge Obtaining the remaining battery charge time T remaind I.e. battery charge remaining time T remaind ＝T sum -T charge 。
According to the method for estimating the battery charging remaining time by the battery management system, provided by the embodiment of the invention, the battery heating time and the cut-off charging time are considered, each stage in the charging process is subdivided, an accurate charging current mapping table and a charging time comparison table are provided, and the accuracy of estimating the battery charging remaining time is improved.
According to the embodiment of the invention, the background server is used for carrying out statistics and analysis on the parameter information and the actual charging state information which influence the charging time of the battery, and optimizing and updating the related charging parameters. The background server obtains a more complete and accurate new data table for estimating the battery charging time through carrying out statistical analysis on the big data, and issues the new data table to the battery management system BMS, and the battery management system BMS estimates the battery charging remaining time according to the new data table, and the estimation accuracy is effectively improved through the big data of the background server. The statistics and the arrangement of the battery charging related parameter data are processed by a background server with stronger computing capacity, the battery management system BMS estimates the charging remaining time according to the actual charging condition by using the parameter data processed by the background server, the data calculation amount and the data storage amount of the BMS are reduced, and the computing load of the BMS is effectively reduced.
Fig. 3 is a block diagram of a battery charge remaining time estimation system provided in one embodiment of the present invention. As shown in fig. 3, an embodiment of the present invention provides a battery charge remaining time estimation system, including:
the battery management system is used for estimating the charging time data of the battery according to a stored initial data table for estimating the charging time of the battery, collecting parameter information influencing the charging time of the battery and actual charging state information of the battery under different environments, and sending the charging time data, the parameter information and the actual charging state information to a background server;
the background server is used for updating the stored initial data table for estimating the battery charging time according to the received charging time data, the parameter information and the actual charging state information to establish a new data table, and sending the new data table to the battery management system;
the battery management system is further configured to replace the stored initial data table with the new data table, and estimate a battery charging remaining time according to the new data table and current parameter information affecting the battery charging time.
Further, the system further comprises:
and the communication device is in communication connection with the battery management system and the background server and is used for transmitting the charging time data, the parameter information and the actual charging state information which are transmitted to the battery management system to the background server and transmitting the new data table transmitted from the background server to the battery management system. The communication device is, for example, an on-board t_ Box (Telematics BOX), and the on-board t_box communicates with the battery management system BMS through a CAN bus and communicates with the background server through a wireless connection.
Further, the background server is configured to send the new data table under a condition that an error between the received charging time data and corresponding charging time data in the new data table exceeds a preset error range.
Those skilled in the art will appreciate that all or part of the steps in a method for implementing the above embodiments may be implemented by a program stored in a storage medium, where the program includes several instructions for causing a single-chip microcomputer, chip or processor (processor) to perform all or part of the steps in a method according to the embodiments of the invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The alternative embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the embodiments of the present invention are not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the embodiments of the present invention within the scope of the technical concept of the embodiments of the present invention, and all the simple modifications belong to the protection scope of the embodiments of the present invention. In addition, any combination of the various embodiments of the present invention may be made, so long as it does not deviate from the idea of the embodiments of the present invention, and it should also be regarded as what is disclosed in the embodiments of the present invention.
Claims (8)
1. A battery charge remaining time estimation method applied to a battery management system storing an initial data table for estimating a battery charge time, the method comprising:
s1) estimating charging time data of a battery according to the stored initial data table, and sending the charging time data, parameter information which is collected under different environments and affects the charging time of the battery and actual charging state information of the battery to a background server, wherein the background server stores the initial data table, and the parameter information which affects the charging time of the battery comprises: the initial cell temperature and initial cell voltage of the battery, the charging time data comprising: heating time corresponding to different initial cell temperatures, and charging time corresponding to different cell temperature intervals and different cell voltage intervals;
s2) receiving a new data table sent by the background server, wherein the new data table is established by the background server by updating the initial data table according to the received charging time data, the parameter information and the actual charging state information;
s3) replacing the stored initial data table with the new data table, the new data table comprising: a charging current map, a charging time map, and a battery heating time map;
s4) estimating the battery charging remaining time according to the new data table and the current parameter information affecting the battery charging time, wherein the method specifically comprises the following steps:
s41) acquiring the cell temperature and the cell voltage of the battery in real time;
s42) obtaining charge accumulation time of each stage of charge according to the battery cell temperature and battery cell voltage, the charge current mapping table and the charge time comparison table;
s43) estimating the time for the battery to reach the full charge state according to the charge accumulation time of each charging stage;
s44) calculating an accumulated charged time according to the current charge current and the current SOC value, and subtracting the accumulated charged time from the time to reach the full charge state to obtain the battery charge remaining time.
2. The battery charge remaining time estimation method according to claim 1, wherein the background server transmits the new data table on the condition that an error of the received charge time data and the corresponding charge time data in the new data table exceeds a preset error range.
3. The battery charge remaining time estimation method according to claim 2, wherein step S41) acquires the cell temperature and the cell voltage of the battery in real time, further comprising:
judging whether the battery needs to be heated according to the initial cell temperature of the battery, if so, determining the battery heating time according to the battery heating schedule.
4. The battery charge remaining time estimation method according to claim 3, wherein step S42) obtains a charge accumulation time of each stage of charging according to the cell temperature and cell voltage, the charge current map, and the charge time map, comprising:
determining the maximum charging current corresponding to different battery cell temperature intervals and different battery cell voltage intervals in each charging stage according to the charging current mapping table and the battery cell temperature and the battery cell voltage acquired in real time;
and determining the charging time required by charging by adopting the corresponding maximum charging current at each charging stage according to the charging time comparison table.
5. The battery charge remaining time estimation method according to claim 4, wherein the time to reach the full charge state in step S43) includes: the charging accumulation time of each charging stage, the battery heating time and the cut-off charging time, wherein the cut-off charging time is the charging holding time when the battery cell voltage is close to the full charging voltage in the charging process.
6. A battery charge remaining time estimation system, the system comprising:
the battery management system is used for estimating the charging time data of the battery according to a stored initial data table for estimating the charging time of the battery, collecting parameter information influencing the charging time of the battery and actual charging state information of the battery under different environments, and sending the charging time data, the parameter information and the actual charging state information to a background server, wherein the parameter information influencing the charging time of the battery comprises: the initial cell temperature and initial cell voltage of the battery, the charging time data comprising: heating time corresponding to different initial cell temperatures, and charging time corresponding to different cell temperature intervals and different cell voltage intervals;
the background server is used for updating the stored initial data table for estimating the battery charging time according to the received charging time data, the parameter information and the actual charging state information to establish a new data table, and sending the new data table to the battery management system;
the battery management system is further configured to replace the stored initial data table with the new data table, the new data table including: the charging current mapping table, the charging time comparison table and the battery heating time table estimate the battery charging remaining time according to the new data table and the current parameter information affecting the battery charging time, and specifically comprises the following steps:
s41) acquiring the cell temperature and the cell voltage of the battery in real time;
s42) obtaining charge accumulation time of each stage of charge according to the battery cell temperature and battery cell voltage, the charge current mapping table and the charge time comparison table;
s43) estimating the time for the battery to reach the full charge state according to the charge accumulation time of each charging stage;
s44) calculating an accumulated charged time according to the current charge current and the current SOC value, and subtracting the accumulated charged time from the time to reach the full charge state to obtain the battery charge remaining time.
7. The battery charge remaining time estimation system of claim 6, wherein the system further comprises:
and the communication device is in communication connection with the battery management system and the background server and is used for transmitting the charging time data, the parameter information and the actual charging state information which are transmitted to the battery management system to the background server and transmitting the new data table transmitted from the background server to the battery management system.
8. The battery charge remaining time estimation system according to claim 6, wherein,
the background server is used for sending the new data table under the condition that the error of the received charging time data and the corresponding charging time data in the new data table exceeds a preset error range.
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