Charging control method and system of lithium iron phosphate battery and computer equipment

Abstract

The invention discloses a charging control method and system of a lithium iron phosphate battery, computer equipment and a storage medium. The charging control method mainly comprises the steps that S101, original characteristic parameters of the charging control system are detected, and a data comparison table corresponding to current set values and current deviation values is established and stored; s102, detecting and acquiring a real-time charging current value output by a charging control system according to a current current set value input by a user; s103, according to the current set value, the real-time charging current value and the data in the data comparison table, calculating to obtain a charging current control parameter; and S104, controlling a real-time charging current value output by a charging control system according to the charging current control parameter. According to the scheme, the real-time charging current value output by the system can be accurately controlled to be close to the current set value input by the user, the deviation between the actual charging current and the set value input by the user is reduced, the charging stability is improved, the safety of the lithium iron phosphate battery can be improved, and the service life of the lithium iron phosphate battery can be prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of battery charging, and in particular to a charging control method and system for a lithium iron phosphate battery, as well as a computer device and a storage medium. Background Art

[0003] High-power switching power supplies usually switch between constant current, constant voltage and floating charge modes when charging lithium iron phosphate batteries. In the constant current charging mode of lithium iron phosphate batteries, the charging current is usually set to a maximum value by the hardware circuit. Due to factors such as the inconsistency of high-power switching circuits and the accuracy deviation of electronic components, the actual output charging current deviates greatly from the set value input by the user. Under the condition of high-power charging currents of tens of amperes, it is difficult to accurately control the charging settings to the milliampere level, resulting in poor stability in the charging process of lithium iron phosphate batteries, which is not conducive to improving the safety and life of lithium iron phosphate batteries. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a charging control method and system for a lithium iron phosphate battery, as well as a computer device and a storage medium, to solve the problem of how to reduce the deviation value between the actual charging current and the set value input by the user during the charging process of the lithium iron phosphate battery, and improve the charging stability to increase the safety and life of the lithium iron phosphate battery.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] One aspect of the present invention is to provide a charging control method for a lithium iron phosphate battery, comprising:

[0007] S101, detecting original characteristic parameters of the charging control system, obtaining a deviation value of the actual charging current relative to the current setting value, establishing and storing a data comparison table corresponding to the current setting value and the current deviation value;

[0008] S102, starting the charging control system to start charging according to the current current setting value input by the user, and detecting and obtaining the real-time charging current value output by the charging control system;

[0009] S103, calculating and obtaining a charging current control parameter according to the current current setting value, the real-time charging current value and the data in the data comparison table;

[0010] S104. According to the charging current control parameter, control the real-time charging current value output by the charging control system to charge the lithium iron phosphate battery.

[0011] Preferably, the step S101 includes:

[0012] Within the allowable current range of charging, determine N successively increasing current setting values ​​I i1 ~I iN ;

[0013] In the original charging control mode, the charging control system detects the current setting value I in The actual charging current I corresponding to the output on , calculate the current deviation value ΔI n =I on -I in ;

[0014] Establish the current setting value I i1 ~I iN Current deviation ΔI 1 ~ΔI N The corresponding data comparison table is stored;

[0015] Here, N is an integer greater than or equal to 10, and n=1, 2, ..., N.

[0016] Preferably,

[0017] Preferably, the step S103 includes calculating and obtaining the charging current control parameter based on the following formula:

[0018]

[0019] In the formula, s is the charging current control parameter, I set is the current setting value, I o is the real-time charging current value, k is a constant set based on the hardware parameters of the charging current; I im and I im+1 and ΔI m and ΔI m+1 Respectively obtain from the data comparison table, I im and I im+1 Select the current setting value I i1 ~I iN Zhong and I set The two current setting values ​​with the smallest difference, and I im ≤I set <I im+1 , ΔI m is the current setting value I im The current deviation value, ΔI m+1 is the current setting value I im+1 The current deviation value.

[0020] Another aspect of the present invention is to provide a charging control system for a lithium iron phosphate battery, comprising a data storage module, a current acquisition module, a parameter calculation module, a current control module and a charging circuit module; wherein,

[0021] The data storage module is used to store a data comparison table corresponding to the current setting value and the current deviation value; wherein the data comparison table is established by detecting the original characteristic parameters of the charging control system and obtaining the deviation value of the actual charging current relative to the current setting value;

[0022] The current acquisition module is used to detect and obtain the real-time charging current value output by the charging circuit module when the user inputs the current current setting value to start the charging control system to start charging;

[0023] The parameter calculation module is used to calculate and obtain the charging current control parameter according to the current current setting value, the real-time charging current value and the data in the data comparison table;

[0024] The current control module is used to control the real-time charging current value output by the charging circuit module according to the charging current control parameter to charge the lithium iron phosphate battery.

[0025] Furthermore, the present invention also provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the charging control method as described above when executing the computer program.

[0026] Furthermore, the present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the charging control method as described above is implemented.

[0027] The charging control method and system of the lithium iron phosphate battery provided in the embodiment of the present invention first detect and obtain the original characteristic parameters of the charging control system, that is, a data comparison table established according to the correspondence between the current setting value input by the user and the deviation value of the actual charging current output by the system, and then detect and obtain the real-time charging current value output by the system according to the current current setting value input by the user, and then calculate and obtain the charging current control parameters according to the current current setting value, the real-time charging current value and the data in the data comparison table, and finally charge by controlling the real-time charging current value output by the charging control system by the charging current control parameters, and correct and control the real-time charging current value by combining the characteristic parameters of the charging control system, the current current setting value input by the user and the real-time charging current value fed back by the detection, so that the real-time charging current value output by the system can be accurately controlled to be close to the current setting value input by the user, thereby reducing the deviation between the actual charging current and the setting value input by the user during the charging process of the lithium iron phosphate battery, improving the charging stability, and further improving the safety and life of the lithium iron phosphate battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a structural block diagram of a charging control system in an embodiment of the present invention;

[0029] Figure 2 is a flow chart of a charging control method in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present invention clearer, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the present invention shown in the accompanying drawings and described according to the accompanying drawings are merely exemplary, and the present invention is not limited to these embodiments.

[0031] It should be noted that the same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0033] The embodiment of the present invention first provides a charging control method and a charging control system for a lithium iron phosphate battery.

[0034] See also Figure 1 The charging control system mainly includes a data storage module 1, a current acquisition module 2, a parameter calculation module 3, a current control module 4 and a charging circuit module 5. The current acquisition module 2 is provided with an ADC circuit unit, and the current control module 4 is provided with a DAC circuit unit.

[0035] See also Figure 2 , the charging control method comprises the following steps:

[0036] Step S101, detecting the original characteristic parameters of the charging control system, obtaining the deviation value of the actual charging current relative to the current setting value, establishing and storing a data comparison table corresponding to the current setting value and the current deviation value.

[0037] Step S102: according to the current setting value input by the user, the charging control system is started to start charging, and the real-time charging current value output by the charging control system is detected and obtained.

[0038] Step S103, calculating and obtaining charging current control parameters according to the current current setting value, the real-time charging current value and the data in the data comparison table.

[0039] Step S104: According to the charging current control parameter, the real-time charging current value output by the charging control system is controlled to charge the lithium iron phosphate battery.

[0040] Among them, combined Figure 1 and Figure 2As shown, the data storage module 1 is connected to the parameter calculation module 3, and the data comparison table established based on the above step S101 is stored in the data storage module 1. The current acquisition module 2 is connected between the charging circuit module 5 and the parameter calculation module 3. Corresponding to the above step S102, the current acquisition module 2 detects and obtains the real-time charging current value output by the charging circuit module 5 of the charging control system, and feeds it back to the parameter calculation module 3. The parameter calculation module 3 receives the current setting value input by the user, receives the real-time charging current value fed back from the current acquisition module 2, and retrieves the data of the data comparison table from the data storage module 1. Corresponding to the above step S103, the parameter calculation module 3 calculates and obtains the charging current control parameter according to the current current setting value, the real-time charging current value and the data in the data comparison table. The current control module 4 is connected to the parameter calculation module 3, and the charging circuit module 5 is connected to the current control module 4. Corresponding to step S104 described above, the current control module 4 receives the charging current control parameters output from the parameter calculation module 3, and controls the real-time charging current value output by the charging circuit module 5 according to the charging current control parameters to charge the lithium iron phosphate battery.

[0041] The charging control method and system described in the above embodiment first detect and obtain the original characteristic parameters of the charging control system, that is, a data comparison table established according to the correspondence between the current setting value input by the user and the deviation value of the actual charging current output by the system, and then detect and obtain the real-time charging current value output by the system according to the current current setting value input by the user, and then calculate and obtain the charging current control parameters according to the current current setting value, the real-time charging current value and the data in the data comparison table, and finally charge by controlling the real-time charging current value output by the charging control system by the charging current control parameters, and correct and control the real-time charging current value by combining the characteristic parameters of the charging control system, the current current setting value input by the user and the real-time charging current value fed back by the detection, so that the real-time charging current value output by the system can be accurately controlled to be close to the current setting value input by the user, thereby reducing the deviation between the actual charging current and the setting value input by the user during the charging process of the lithium iron phosphate battery, improving the charging stability, and further improving the safety and life of the lithium iron phosphate battery.

[0042] In this embodiment, as a preferred solution, step S101 includes the following sub-steps:

[0043] (1) Within the allowable charging current range, determine N successively increasing current setting values ​​I i1 ~I iN , N is an integer greater than 10.

[0044] In the preferred embodiment, the allowable current range of the charging is 0 to 50A, 0 < I i1 <I iN ≤50A, the difference between two adjacent current setting values ​​is 2~3A, that is, I in+1 with I in The difference is 2 to 3A, n = 1, 2, ..., N. In the most preferred embodiment, I iN =50A, that is, I iN The value is the maximum value of the current range allowed for charging, and N current setting values ​​increase in sequence. i1 ~I iN All or part of the current range allowed for charging is an arithmetic progression, for example, i2 ~I iN is an arithmetic progression.

[0045] In a specific case, the allowed current range for charging is 0 to 50A, with N successively increasing current setting values ​​I i1 ~I iN The values ​​of are 1, 2.5, 5, 7.5, ..., 42.5, 45, 47.5 and 50, respectively, and the unit is ampere (A), that is, I i1 The value of I is 1. i2 ~I iN The values ​​of are an arithmetic progression from 2.5 to 50, with a common difference of 2.5.

[0046] (2) In the original charging control mode, the charging control system is detected when the input is the current setting value I in The actual charging current I corresponding to the output on , calculate the current deviation value ΔI n =I on -I in ; In this way, traverse n = 1, 2, ..., N and calculate in sequence, thereby obtaining N current setting values ​​I i1 ~I iN One-to-one correspondence of N current deviation values ​​ΔI 1 ~ΔI N It should be noted that the original charging control method mentioned above refers to a charging control method that is conventionally used.

[0047] (3) Establish the current setting value I i1 ~I iN Current deviation ΔI 1 ~ΔI N The corresponding data comparison table is stored.

[0048] In this embodiment, as a preferred solution, step S103 includes calculating and obtaining the charging current control parameter based on the following formula:

[0049]

[0050] In the formula, s is the charging current control parameter, I set is the current setting value, I o is the real-time charging current value, k is a constant set based on the hardware parameters of the charging current; I im and I im+1 and ΔI m and ΔI m+1 Respectively obtain from the data comparison table, I im and I im+1 Select the current setting value I i1 ~I iN Zhong and I set The two current setting values ​​with the smallest difference, and I im ≤I set <I im+1 , ΔI m is the current setting value I im The current deviation value, ΔI m+1 is the current setting value I im+1 The current deviation value.

[0051] According to the above calculation formula, the charging current control parameter s is mainly based on the current setting value I set , real-time charging current value I o And according to the current current setting value I set Get I from the data comparison table im ,I im+1 , ΔI m and ΔI m+1 The real-time charging current value is corrected and controlled according to the charging current control parameters obtained by calculation, so that the real-time charging current value output by the system can be accurately controlled to be close to the current setting value input by the user, and the real-time charging current value can be prevented from oscillating within the upper and lower ranges of the current setting value. It should be noted that in the above calculation formula, the real-time charging current value I o It should be understood that the current acquisition module 2 detects and obtains the real-time charging current value output by the charging circuit module 5 at the previous moment, and after controlling it according to the calculated charging current control parameters, the charging circuit module 5 outputs a new real-time charging current value, and this cycle is repeated until the real-time charging current value can be controlled to be the same or approximately the same as the current setting value input by the user (the error is within the milliampere level).

[0052] Based on the charging control method of the lithium iron phosphate battery provided in the above embodiment, an embodiment of the present invention further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the charging control method of the lithium iron phosphate battery described in the above embodiment when executing the computer program.

[0053] The memory is a computer-readable storage medium that can be used to store software programs, computer executable programs, and modules. The processor executes various functional applications and data processing of the device by running the software programs, instructions, and modules stored in the memory, that is, the steps of the optimization method of the automation line host computer provided in the aforementioned embodiment of the present invention are implemented.

[0054] Based on the charging control method of the lithium iron phosphate battery provided in the above embodiment, the embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the charging control method of the lithium iron phosphate battery described in the above embodiment are implemented. The computer storage medium can be any available medium or data storage device that can be accessed by a computer, including but not limited to magnetic memory, optical memory, and semiconductor memory.

[0055] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A charging control method for a lithium iron phosphate battery, characterized in that: include: S101, detecting original characteristic parameters of the charging control system, obtaining a deviation value of the actual charging current relative to the current setting value, establishing and storing a data comparison table corresponding to the current setting value and the current deviation value; S102, starting the charging control system to start charging according to the current current setting value input by the user, and detecting and obtaining the real-time charging current value output by the charging control system; S103, calculating and obtaining a charging current control parameter according to the current current setting value, the real-time charging current value and the data in the data comparison table; S104. According to the charging current control parameter, control the real-time charging current value output by the charging control system to charge the lithium iron phosphate battery.

2. The charging control method according to claim 1, characterized in that: The step S101 includes: Within the allowable current range of charging, determine N successively increasing current setting values ​​I i1 ~I iN ; In the original charging control mode, the charging control system detects the current setting value I in The actual charging current I corresponding to the output on , calculate the current deviation value ΔI n =I on -I in ; Establish the current setting value I i1 ~I iN And the current deviation value ΔI1~ΔI N The corresponding data comparison table is stored; Here, N is an integer greater than or equal to 10, and n=1, 2, ..., N.

3. The charging control method according to claim 2, characterized in that: The allowable current range of the charging is 0~50A, 0<I i1 <I iN ≤50A, and I in+1 with I in The difference is 2 to 3A.

4. The charging control method according to claim 3, characterized in that: N successively increasing current setting values ​​I i1 ~I iN The current range allowed for charging is an arithmetic progression.

5. The charging control method according to any one of claims 2 to 4, characterized in that: The step S103 includes calculating and obtaining the charging current control parameter based on the following formula: In the formula, s is the charging current control parameter, I set is the current setting value, I o is the real-time charging current value, k is a constant set based on the hardware parameters of the charging current; I im and I im+1 and ΔI m and ΔI m+1 Respectively obtain from the data comparison table, I im and I im+1 Select the current setting value I i1 ~I iN Zhong and I set The two current setting values ​​with the smallest difference, and I im ≤I set <I im+1 , ΔI m is the current setting value I im The current deviation value, ΔI m+1 is the current setting value I im+1 The current deviation value.

6. A charging control system for a lithium iron phosphate battery, characterized in that: It includes a data storage module, a current acquisition module, a parameter calculation module, a current control module and a charging circuit module; The data storage module is used to store a data comparison table corresponding to the current setting value and the current deviation value; wherein the data comparison table is established by detecting the original characteristic parameters of the charging control system and obtaining the deviation value of the actual charging current relative to the current setting value; The current acquisition module is used to detect and obtain the real-time charging current value output by the charging circuit module when the user inputs the current current setting value to start the charging control system to start charging; The parameter calculation module is used to calculate and obtain the charging current control parameter according to the current current setting value, the real-time charging current value and the data in the data comparison table; The current control module is used to control the real-time charging current value output by the charging circuit module according to the charging current control parameter to charge the lithium iron phosphate battery.

7. The charging control system according to claim 6, characterized in that: The data comparison table is established based on the following method: Within the allowable current range of charging, determine N successively increasing current setting values ​​I i1 ~I iN ; In the original charging control mode, the charging control system detects the current setting value I in The actual charging current I corresponding to the output on , calculate the current deviation value ΔI n =I on -I in ; Establish the current setting value I i1 ~I iN And the current deviation value ΔI1~ΔI N Corresponding data comparison table; Wherein, N is an integer greater than 10, n=1, 2, ..., N; The allowable current range of charging is 0-50A, 0<I i1 <I iN ≤50A, N current setting values ​​I increasing in sequence i1 ~I iN In the allowable current range of the charging, it is an arithmetic progression, and I in+1 with I in The difference is 2 to 3A.

8. The charging control system according to claim 7, characterized in that: The parameter calculation module calculates and obtains the charging current control parameter based on the following formula: In the formula, s is the charging current control parameter, I set is the current setting value, I o is the real-time charging current value, k is a constant set based on the hardware parameters of the charging current; I im and I im+1 and ΔI m and ΔI m+1 Respectively obtain from the data comparison table, I im and I im+1 Select the current setting value I i1 ~I iN Zhong and I set The two current setting values ​​with the smallest difference, and I im ≤I set <I im+1 , ΔI m is the current setting value I im The current deviation value, ΔI m+1 is the current setting value I im+1 The current deviation value.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the charging control method as described in any one of claims 1 to 5 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the charging control method as described in any one of claims 1 to 5 is implemented.

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