CN110766319A - Method and device for evaluating abuse risk of battery pack - Google Patents
Method and device for evaluating abuse risk of battery pack Download PDFInfo
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Abstract
The embodiment of the application discloses a method and a device for evaluating abuse risk of a battery pack, aiming at the current charging of a target battery pack, the charged quantity and the charging parameters of the target battery pack in each charge state within the range of the target charge state are obtained, the charging parameters comprise current and one or more of voltage, monomer voltage and temperature, and the monomer voltage is the voltage of a battery in the target battery pack; calculating the chargeable amount of the target battery pack in each state of charge according to the final charged amount of the target battery pack in the current charging and the charged amount in each state of charge; determining the safe charging amount of the target battery pack in each charge state according to the voltage, the single voltage, the temperature and the current of the target battery pack in each charge state; determining the abuse risk of the target battery pack according to the chargeable amount and the safe charged amount of the target battery pack in each state of charge.
Description
Technical Field
The application relates to the technical field of power batteries, in particular to a method and a device for evaluating abuse risk of a battery pack.
Background
The risk of abuse may refer to the risk of damage due to abuse. In practical scenarios, the current safety state of the battery is usually obtained by assessing the risk of abuse of the battery pack. Wherein, the battery package includes a plurality of batteries.
Currently, the risk of abuse of a battery pack is evaluated mainly based on the difference between the current during charging of the battery pack and the safe current. Since parameters such as voltage and temperature during charging of the battery pack still have a certain influence on the abuse risk of the battery pack, the abuse risk of the battery pack cannot be accurately determined based on the parameter of current.
It can be seen that how to improve the accuracy of determining the abuse risk of a battery pack is a problem that needs to be solved at present.
Disclosure of Invention
In order to solve the technical problem, the application provides a method and a device for evaluating the abuse risk of a battery pack, which can improve the accuracy of determining the abuse risk of the battery pack.
The embodiment of the application discloses the following technical scheme:
the embodiment of the application provides a method for evaluating abuse risk of a battery pack, which comprises the following steps:
aiming at the current charging of a target battery pack, acquiring the charged quantity and charging parameters of the target battery pack in each charge state within a target charge state range, wherein the charging parameters comprise one or more of current and voltage, monomer voltage and temperature, and the monomer voltage is the voltage of a battery in the target battery pack;
calculating the chargeable amount of the target battery pack in each state of charge according to the final charged amount of the target battery pack in the current charging and the charged amount in each state of charge;
determining the safe charging amount of the target battery pack in each state of charge according to the charging parameters of the target battery pack in each state of charge;
determining the abuse risk of the target battery pack according to the chargeable amount and the safe charged amount of the target battery pack in each state of charge.
Optionally, the determining the safe charging amount of the target battery pack in each state of charge according to the voltage, the cell voltage, the temperature, and the current of the target battery pack in each state of charge includes:
inputting the charging parameters and the corresponding charge states of the target battery pack in each charge state into a safe charge quantity calculation model to obtain the safe charge quantity of the target battery pack in each charge state;
the safe charging amount calculation model is obtained by training according to historical data of a normal battery pack in a historical charging process, the historical data comprises charging parameters and chargeable amount of the normal battery pack in each charging state within a target charging state range, and the normal battery pack and the target battery pack belong to the same type.
Optionally, the determining the abuse risk of the target battery pack according to the chargeable amount and the safe charge amount of the target battery pack in each state of charge includes:
determining an average additional charging amount of each charging of the target battery pack from the first time to the current time, wherein the average additional charging amount is obtained by averaging according to a difference value between a chargeable amount and a safe charging amount in each charging state in each charging process of the target battery pack;
calculating an accumulated additional charge amount according to the average additional charge amount of the target battery pack in each charging process;
determining a risk of abuse of the target battery pack based on the accumulated additional charge.
Optionally, the method further includes:
acquiring a time interval between the charging time of each charging of the target battery pack and the charging time of the current charging;
determining a weight coefficient corresponding to the average additional charge of each charging of the target battery pack according to the time interval;
the calculating an accumulated additional charge amount according to the average additional charge amount of the target battery pack in each charging process includes:
and calculating the accumulated additional charge according to the average additional charge of the target battery pack in each charging process and the corresponding weight coefficient.
Optionally, the target state of charge range is: state of charge > 0.9.
The embodiment of the application provides an evaluation device of battery package abuse risk, the device includes:
the charging control device comprises an acquisition unit, a charging control unit and a control unit, wherein the acquisition unit is used for acquiring charged quantity and charging parameters of a target battery pack in each charge state within a target charge state range aiming at the current charging of the target battery pack, the charging parameters comprise one or more of current and voltage, monomer voltage and temperature, and the monomer voltage is the voltage of a battery in the target battery pack;
the calculation unit is used for calculating the chargeable amount of the target battery pack in each charge state according to the final charged amount of the target battery pack in the current charging and the charged amount in each charge state;
the determining unit is used for determining the safe charging amount of the target battery pack in each charge state according to the voltage, the single voltage, the temperature and the current of the target battery pack in each charge state;
the determination unit is further configured to determine the abuse risk of the target battery pack according to the chargeable amount and the safe charge amount of the target battery pack in each state of charge.
Optionally, the determining unit is specifically configured to:
inputting the charging parameters and the corresponding charge states of the target battery pack in each charge state into a safe charge quantity calculation model to obtain the safe charge quantity of the target battery pack in each charge state;
the safe charging amount calculation model is obtained by training according to historical data of a normal battery pack in a historical charging process, the historical data comprises charging parameters and chargeable amount of the normal battery pack in each charging state within a target charging state range, and the normal battery pack and the target battery pack belong to the same type.
Optionally, the determining unit is specifically configured to:
determining an average additional charging amount of each charging of the target battery pack from the first time to the current time, wherein the average additional charging amount is obtained by averaging according to a difference value between a chargeable amount and a safe charging amount in each charging state in each charging process of the target battery pack;
calculating an accumulated additional charge amount according to the average additional charge amount of the target battery pack in each charging process;
determining a risk of abuse of the target battery pack based on the accumulated additional charge.
Optionally, the determining unit is specifically configured to:
acquiring a time interval between the charging time of each charging of the target battery pack and the charging time of the current charging;
determining a weight coefficient corresponding to the average additional charge of each charging of the target battery pack according to the time interval;
the calculating an accumulated additional charge amount according to the average additional charge amount of the target battery pack in each charging process includes:
and calculating the accumulated additional charge according to the average additional charge of the target battery pack in each charging process and the corresponding weight coefficient.
Optionally, the target state of charge range is: state of charge > 0.9.
An embodiment of the present application provides an evaluation apparatus for risk of abuse of a battery pack, the apparatus including a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the method for evaluating the abuse risk of the battery pack according to the instructions in the program codes.
The embodiment of the application provides a computer-readable storage medium for storing program codes, and the program codes are used for executing the method for evaluating the abuse risk of the battery pack.
According to the technical scheme, the charged quantity and the charging parameters of the target battery pack in each charge state within the range of the target charge state are obtained aiming at the current charging of the target battery pack, the charging parameters comprise one or more of current and voltage, monomer voltage and temperature, and the monomer voltage is the voltage of the battery in the target battery pack; calculating the chargeable amount of the target battery pack in each state of charge according to the final charged amount of the target battery pack in the current charging and the charged amount in each state of charge; determining the safe charging amount of the target battery pack in each state of charge according to the charging parameters of the target battery pack in each state of charge; determining the abuse risk of the target battery pack according to the chargeable amount and the safe charged amount of the target battery pack in each state of charge. Therefore, the parameters adopted by the method comprise the charging parameters of the target battery pack at each state of charge in the charging process, and the related parameters for determining the abuse risk of the battery pack are taken into consideration, so that the abuse risk determined for the target battery pack is more accurate.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a flowchart of a method for assessing abuse risk of a battery pack according to an embodiment of the present application;
fig. 2 is a flowchart of a method for determining the abuse risk of the target battery pack according to an embodiment of the present application;
fig. 3 is a flowchart of a method for determining an accumulated additional charge of the target battery pack based on a weight coefficient according to an embodiment of the present disclosure;
fig. 4 is a block diagram of an apparatus for evaluating risk of abuse of a battery pack according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described below with reference to the accompanying drawings.
Currently, the risk of abuse of a battery pack is evaluated mainly based on the difference between the current during charging of the battery pack and the safe current. Since parameters such as voltage and temperature during charging of the battery pack still have a certain influence on the abuse risk of the battery pack, the abuse risk of the battery pack cannot be accurately determined based on the parameter of current.
For this purpose, an embodiment of the present application provides a method for evaluating abuse risk of a battery pack, where for this charging of a target battery pack, a charged amount and a charging parameter of the target battery pack at each state of charge within a target state of charge range are obtained, where the charging parameter includes one or more of a current and a voltage, a cell voltage, and a temperature, and the cell voltage is a voltage of a battery in the target battery pack; calculating the chargeable amount of the target battery pack in each state of charge according to the final charged amount of the target battery pack in the current charging and the charged amount in each state of charge; determining the safe charging amount of the target battery pack in each state of charge according to the charging parameters of the target battery pack in each state of charge; determining the abuse risk of the target battery pack according to the chargeable amount and the safe charged amount of the target battery pack in each state of charge. Therefore, the parameters adopted by the method comprise the charging parameters of the target battery pack at each state of charge in the charging process, and the related parameters for determining the abuse risk of the battery pack are taken into consideration, so that the abuse risk determined for the target battery pack is more accurate.
Referring to fig. 1, which shows a flowchart of a method for evaluating abuse risk of a battery pack according to an embodiment of the present application, the method may include:
s101: and aiming at the current charging of the target battery pack, acquiring the charged quantity and the charging parameters of the target battery pack in each charge state within the range of the target charge state.
The charging parameters comprise current and one or more of voltage, cell voltage and temperature, and the cell voltage is the voltage of the battery in the target battery pack.
A battery pack for which abuse risk assessment is required may be used as the target battery pack. In a practical scenario, the target battery pack may be a power battery pack in a vehicle, the target battery pack may include a plurality of batteries, voltages of the batteries included in the battery pack may be referred to as cell voltages, and the batteries may be connected in series.
In the embodiment of the present application, when the abuse risk of the target battery pack is evaluated, for the current charging of the target battery pack, the charged amount and the charging parameters of the target battery pack at each SOC within a target State of Charge (SOC) range are obtained. Wherein, the state of charge may refer to a ratio of a remaining capacity of the battery after a period of use to a capacity of a fully charged state; the charged amount may refer to an amount of electricity that has been charged into the target battery pack; the voltage may refer to the total voltage of the target battery pack; the cell voltage may refer to a voltage of a battery included in the target battery pack, the temperature may refer to a temperature of the target battery pack, and the current may refer to a current in the target battery pack (since the batteries in the target battery pack are in a series relationship, the current in the target battery pack is a current in the batteries connected in series in the target battery pack).
For convenience of description, four parameters of the voltage, the cell voltage, the temperature and the current of the target battery pack at each state of charge SOC may be denoted as Wi, where i is a positive integer.
In a specific implementation, the SOC range of the target battery pack is [0,1], and in one possible implementation, the target SOC range in the embodiment of the present application is: SOC > 0.9.
S102: and calculating the chargeable amount of the target battery pack in each SOC according to the final charged amount of the target battery pack in the current charging and the charged amount in each SOC.
For convenience of description, the chargeable amount of the target battery pack at each state of charge SOC may be denoted as Qi.
In this embodiment of the present application, a final charge amount of the target battery pack after the current charging is completed may also be obtained. In this manner, the chargeable amount of the target battery pack at each SOC can be calculated from the final charge amount and the charged amount at each SOC.
For example, if the final charged amount of the target battery pack after the completion of the current charge is 800mA · h and the charged amount at one SOC is 500mA · h, the chargeable amount at the SOC is 300mA · h.
S103: and determining the safe charging amount of the target battery pack in each SOC according to the voltage, the cell voltage, the temperature and the current of the target battery pack in each SOC.
In the embodiment of the present application, the sequence of steps S102 and S103 is not limited.
For convenience of description, the safe charge amount of the target battery pack at each state of charge SOC may be written as Qi', where i is a positive integer.
In one possible implementation manner, for S103, the method for determining the safe charging amount of the target battery pack at each state of charge SOC according to the charging parameter of the target battery pack at each state of charge SOC may include:
in the embodiment of the present application, a safe charge calculation model may be pre-trained so that when a charging parameter of a target battery pack at a state of charge SOC and a corresponding state of charge SOC are input thereto, a safe charge of the target battery pack at the SOC may be output, and in short, the safe charge calculation model corresponds to Qi' ═ f (wi).
The safe charging amount calculation model can be obtained by training according to historical data of a normal battery pack in a historical charging process. The normal battery pack and the target battery pack should be of the same type. In a specific implementation, the normal battery pack may be a battery pack of the same type as the target battery pack in another vehicle, and in addition, the normal battery pack may also be the target battery pack before the current charging.
The historical data of the normal battery pack during the historical charging process may include charging parameters and chargeable amount of the normal battery pack at each SOC within the target SOC range. The chargeable amount of the normal battery in one SOC during historical charging process may be a difference between a final charged amount of the normal battery after completing the charging process and an already charged amount of the normal battery in the SOC.
In this way, after obtaining the safe charging amount calculation model, the charging parameters and the corresponding states of charge SOC of the target battery pack at each state of charge SOC may be input into the safe charging amount calculation model, and the safe charging amount of the target battery pack at each state of charge SOC may be determined.
S104: determining the abuse risk of the target battery pack according to the chargeable amount and the safe charging amount of the target battery pack at each SOC.
In one possible implementation manner, with respect to S104, referring to fig. 2, this illustrates a flowchart of a method for determining the abuse risk of the target battery pack according to the chargeable amount and the safe charge amount of the target battery pack at each state of charge provided by the embodiment of the present application, where this method may include:
s201: and determining the average additional charging amount of each charging of the target battery pack from the first time to the current time, wherein the average additional charging amount is obtained by averaging the difference values of the chargeable amount and the safe charging amount in each state of charge in each charging process of the target battery pack.
It is understood that the target battery pack may be a battery pack that has been charged a plurality of times before the current charging, and thus, for each charging process of the target battery pack from the first charging to the current charging, the average additional charging amount of the current charging may be determined. The method for calculating the average additional charge amount per charging of the target battery pack may be: and averaging according to the difference value between the chargeable amount and the safe charging amount in each charge state in each charging process of the target battery pack.
That is, each charging process for the target battery pack has a chargeable amount Qi and a safe charged amount Qi' at each state of charge within the range of the target state of charge when the target battery pack is charged this time. In this way, the difference (Qi-Qi') between the chargeable amount and the safe charge amount in each state of charge within the target state of charge range during the current charging of the target battery pack can be calculated, and the difference between the chargeable amount and the safe charge amount in the state of charge can be averaged, so as to obtain the average additional charge amount of the current charging of the target battery pack. For convenience of description, the average additional charge of the target battery pack during this charging may be denoted as Q0, and then Q0 is mean (Qi-Qi').
Next, a description will be given of a method of determining the average additional charge amount per charge of the target battery pack, taking the present charge of the target battery pack as an example.
Assuming that the chargeable amounts respectively corresponding to 91%, 93%, 95%, 97% and 99% of the state of charge of the target battery pack in the target state of charge range are 800mA · h, 700mA · h, 630mA · h, 570mA · h and 500mA · h, and the safe charged amounts respectively corresponding to the determined states of charge are 780mA · h, 670mA · h, 600mA · h, 550mA · h and 480mA · h, the average additional Q0 ═ mean [ (800 + 780) + (700 + 670) + (630 + 600) + (570 + 550) + (500 + 480) ] of the target battery pack in this charging is calculated, that is, Q0 ═ 24mA · h.
S202: and calculating the accumulated additional charge according to the average additional charge of the target battery pack in each charging process.
For convenience of description, the cumulative additional charge of the target battery pack may be written as Q.
In one possible implementation manner, referring to fig. 3, this figure shows a flowchart of a method for determining an accumulated additional charge of the target battery pack based on a weight coefficient according to an embodiment of the present application, where the method further includes:
s301: and acquiring the time interval between the charging time of each charging of the target battery pack and the charging time of the current charging.
In the embodiment of the application, a time interval between the charging time of each charging of the target battery pack and the charging time of the current charging can be obtained, wherein, for example, the time when the target battery pack starts to be charged each time can be used as the charging time of each charging of the target battery pack; alternatively, for example, an arbitrary time in the middle of each charging of the target battery pack may be set as the charging time of each charging of the target battery pack.
S302: and determining a weight coefficient corresponding to the average additional charge of each charging of the target battery pack according to the time interval.
Then, a weight coefficient corresponding to the average additional charge of each charge of the target battery pack may be determined according to the obtained time interval, wherein if the time interval between one charge and the current charge of the target battery pack is larger, the weight coefficient corresponding to the average additional charge of the target battery pack at this time may be set smaller.
Then, the above S202 includes:
s303: and calculating the accumulated additional charge according to the average additional charge of the target battery pack in each charging process and the corresponding weight coefficient.
Therefore, when calculating the accumulated additional charge, the products obtained by multiplying the average additional charge of the target battery pack by the corresponding weight coefficients in each charging process can be added, and the final sum can be used as the accumulated additional charge.
The following exemplifies the method of S310 to S303.
Assuming that the current charge of the target battery pack is the third charge, the average additional charge amount of the current charge is 300mA · h, the average additional charge amounts of the first and second charges are 200mA · h and 100mA · h, respectively, and the weight coefficients corresponding to the set average additional charge amounts of the first to third charges are: 20%, 30%, 50%, the cumulative additional charge Q is calculated by:
Q＝100*20％+200*30％+300*50％＝230mA·h
s203: determining a risk of abuse of the target battery pack based on the accumulated additional charge.
Thus, the risk of abuse of the target battery pack can be determined according to the level of the calculated accumulated additional charge amount. Wherein the higher the cumulative additional charge of the target battery pack, the higher the abuse risk thereof is determined.
According to the technical scheme, the charged quantity and the charging parameters of the target battery pack in each charge state within the range of the target charge state are obtained aiming at the current charging of the target battery pack, the charging parameters comprise one or more of current and voltage, monomer voltage and temperature, and the monomer voltage is the voltage of the battery in the target battery pack; calculating the chargeable amount of the target battery pack in each state of charge according to the final charged amount of the target battery pack in the current charging and the charged amount in each state of charge; determining the safe charging amount of the target battery pack in each state of charge according to the charging parameters of the target battery pack in each state of charge; determining the abuse risk of the target battery pack according to the chargeable amount and the safe charged amount of the target battery pack in each state of charge. Therefore, the parameters adopted by the method comprise the voltage, the cell voltage, the temperature and the current of the target battery pack in each charge state in the charging process, and all relevant parameters for determining the abuse risk of the battery pack are taken into consideration, so that the abuse risk determined for the target battery pack is more accurate.
An evaluation device for risk of abuse of a battery pack according to an embodiment of the present application is provided, and referring to fig. 4, a block diagram of the evaluation device for risk of abuse of a battery pack according to an embodiment of the present application is shown, and the device includes:
an obtaining unit 401, configured to obtain, for this time of charging a target battery pack, a charged amount and a charging parameter of the target battery pack in each state of charge within a target state of charge range, where the charging parameter includes one or more of a current and a voltage, a cell voltage, and a temperature, and the cell voltage is a voltage of a battery in the target battery pack;
a calculating unit 402, configured to calculate a chargeable amount of the target battery pack in each state of charge according to a final charged amount of the target battery pack in the current charging and an already charged amount in each state of charge;
a determining unit 403, configured to determine, according to the charging parameter of the target battery pack in each state of charge, a safe charging amount of the target battery pack in each state of charge;
the determination unit is further configured to determine the abuse risk of the target battery pack according to the chargeable amount and the safe charge amount of the target battery pack in each state of charge.
In a possible implementation manner, the determining unit 403 is specifically configured to:
inputting the voltage, the monomer voltage, the temperature and the current of the target battery pack in each charge state and the corresponding charge state into a safe charge quantity calculation model to obtain the safe charge quantity of the target battery pack in each charge state;
the safe charging amount calculation model is obtained by training according to historical data of a normal battery pack in a historical charging process, the historical data comprises charging parameters and chargeable amount of the normal battery pack in each charging state within a target charging state range, and the normal battery pack and the target battery pack belong to the same type.
In a possible implementation manner, the determining unit 403 is specifically configured to:
determining an average additional charging amount of each charging of the target battery pack from the first time to the current time, wherein the average additional charging amount is obtained by averaging according to a difference value between a chargeable amount and a safe charging amount in each charging state in each charging process of the target battery pack;
calculating an accumulated additional charge amount according to the average additional charge amount of the target battery pack in each charging process;
determining a risk of abuse of the target battery pack based on the accumulated additional charge.
In a possible implementation manner, the determining unit 403 is specifically configured to:
acquiring a time interval between the charging time of each charging of the target battery pack and the charging time of the current charging;
determining a weight coefficient corresponding to the average additional charge of each charging of the target battery pack according to the time interval;
the calculating an accumulated additional charge amount according to the average additional charge amount of the target battery pack in each charging process includes:
and calculating the accumulated additional charge according to the average additional charge of the target battery pack in each charging process and the corresponding weight coefficient.
In one possible implementation, the target state of charge range is: state of charge > 0.9.
According to the technical scheme, the charged quantity and the charging parameters of the target battery pack in each charge state within the range of the target charge state are obtained aiming at the current charging of the target battery pack, the charging parameters comprise one or more of current and voltage, monomer voltage and temperature, and the monomer voltage is the voltage of the battery in the target battery pack; calculating the chargeable amount of the target battery pack in each state of charge according to the final charged amount of the target battery pack in the current charging and the charged amount in each state of charge; determining the safe charging amount of the target battery pack in each state of charge according to the charging parameters of the target battery pack in each state of charge; determining the abuse risk of the target battery pack according to the chargeable amount and the safe charged amount of the target battery pack in each state of charge. Therefore, the parameters adopted by the method comprise the charging parameters of the target battery pack at each state of charge in the charging process, and the related parameters for determining the abuse risk of the battery pack are taken into consideration, so that the abuse risk determined for the target battery pack is more accurate.
An embodiment of the present application provides an evaluation apparatus for risk of abuse of a battery pack, the apparatus including a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the method for evaluating the abuse risk of the battery pack according to the instructions in the program codes.
The embodiment of the application provides a computer-readable storage medium for storing program codes, and the program codes are used for executing the method for evaluating the abuse risk of the battery pack.
As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that all or part of the steps in the above embodiment methods can be implemented by software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present application may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network communication device such as a media gateway, etc.) to execute the method according to the embodiments or some parts of the embodiments of the present application.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. A method for assessing risk of abuse of a battery pack, the method comprising:
aiming at the current charging of a target battery pack, acquiring the charged quantity and charging parameters of the target battery pack in each charge state within a target charge state range, wherein the charging parameters comprise one or more of current and voltage, monomer voltage and temperature, and the monomer voltage is the voltage of a battery in the target battery pack;
calculating the chargeable amount of the target battery pack in each state of charge according to the final charged amount of the target battery pack in the current charging and the charged amount in each state of charge;
determining the safe charging amount of the target battery pack in each state of charge according to the charging parameters of the target battery pack in each state of charge;
determining the abuse risk of the target battery pack according to the chargeable amount and the safe charged amount of the target battery pack in each state of charge.
2. The method of claim 1, wherein determining the safe charge of the target battery pack at each state of charge based on the charging parameters of the target battery pack at each state of charge comprises:
inputting the charging parameters and the corresponding charge states of the target battery pack in each charge state into a safe charge quantity calculation model to obtain the safe charge quantity of the target battery pack in each charge state;
the safe charging amount calculation model is obtained by training according to historical data of a normal battery pack in a historical charging process, the historical data comprises charging parameters and chargeable amount of the normal battery pack in each charging state within a target charging state range, and the normal battery pack and the target battery pack belong to the same type.
3. The method of claim 1, wherein determining the abuse risk of the target battery pack based on the chargeable amount and the safe charged amount of the target battery pack at each state of charge comprises:
determining an average additional charging amount of each charging of the target battery pack from the first time to the current time, wherein the average additional charging amount is obtained by averaging according to a difference value between a chargeable amount and a safe charging amount in each charging state in each charging process of the target battery pack;
calculating an accumulated additional charge amount according to the average additional charge amount of the target battery pack in each charging process;
determining a risk of abuse of the target battery pack based on the accumulated additional charge.
4. The method of claim 3, further comprising:
acquiring a time interval between the charging time of each charging of the target battery pack and the charging time of the current charging;
determining a weight coefficient corresponding to the average additional charge of each charging of the target battery pack according to the time interval;
the calculating an accumulated additional charge amount according to the average additional charge amount of the target battery pack in each charging process includes:
and calculating the accumulated additional charge according to the average additional charge of the target battery pack in each charging process and the corresponding weight coefficient.
5. The method of any of claims 1-4, wherein the target state of charge range is: state of charge > 0.9.
6. An apparatus for assessing risk of abuse of a battery pack, the apparatus comprising:
the charging control device comprises an acquisition unit, a charging control unit and a control unit, wherein the acquisition unit is used for acquiring charged quantity and charging parameters of a target battery pack in each charge state within a target charge state range aiming at the current charging of the target battery pack, the charging parameters comprise one or more of current and voltage, monomer voltage and temperature, and the monomer voltage is the voltage of a battery in the target battery pack;
the calculation unit is used for calculating the chargeable amount of the target battery pack in each charge state according to the final charged amount of the target battery pack in the current charging and the charged amount in each charge state;
the determining unit is used for determining the safe charging amount of the target battery pack in each state of charge according to the charging parameters of the target battery pack in each state of charge;
the determination unit is further configured to determine the abuse risk of the target battery pack according to the chargeable amount and the safe charge amount of the target battery pack in each state of charge.
7. The apparatus according to claim 6, wherein the determining unit is specifically configured to:
inputting the charging parameters and the corresponding charge states of the target battery pack in each charge state into a safe charge quantity calculation model to obtain the safe charge quantity of the target battery pack in each charge state;
the safe charging amount calculation model is obtained by training according to historical data of a normal battery pack in a historical charging process, the historical data comprises charging parameters and chargeable amount of the normal battery pack in each charging state within a target charging state range, and the normal battery pack and the target battery pack belong to the same type.
8. The apparatus according to claim 6, wherein the determining unit is specifically configured to:
determining an average additional charging amount of each charging of the target battery pack from the first time to the current time, wherein the average additional charging amount is obtained by averaging according to a difference value between a chargeable amount and a safe charging amount in each charging state in each charging process of the target battery pack;
calculating an accumulated additional charge amount according to the average additional charge amount of the target battery pack in each charging process;
determining a risk of abuse of the target battery pack based on the accumulated additional charge.
9. The apparatus according to claim 8, wherein the determining unit is specifically configured to:
acquiring a time interval between the charging time of each charging of the target battery pack and the charging time of the current charging;
determining a weight coefficient corresponding to the average additional charge of each charging of the target battery pack according to the time interval;
the calculating an accumulated additional charge amount according to the average additional charge amount of the target battery pack in each charging process includes:
and calculating the accumulated additional charge according to the average additional charge of the target battery pack in each charging process and the corresponding weight coefficient.
10. The apparatus of any one of claims 6-9, wherein the target state of charge range is: state of charge > 0.9.
11. An apparatus for assessing risk of abuse of a battery pack, the apparatus comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the method for assessing risk of abuse of a battery pack according to claims 1-5 according to instructions in the program code.
12. A computer-readable storage medium for storing program code for performing the method for assessing risk of abuse of a battery pack according to claims 1-5.
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