CN112821512A - Charging control method and system for charger - Google Patents

Charging control method and system for charger Download PDF

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Publication number
CN112821512A
CN112821512A CN202110169469.8A CN202110169469A CN112821512A CN 112821512 A CN112821512 A CN 112821512A CN 202110169469 A CN202110169469 A CN 202110169469A CN 112821512 A CN112821512 A CN 112821512A
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charger
output power
battery
max
limit curve
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CN112821512B (en
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刘登基
吴洋
兰宁
李桐青
王景德
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Shenzhen Topband Co Ltd
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Shenzhen Topband Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention relates to a charging control method and a charging control system of a charger, which comprise the following steps: s1, pre-storing a first limit curve, a second limit curve, a third limit curve and a fourth limit curve; s2, acquiring and judging the input voltage of the charger, and adjusting the output power of the charger to enable the charger to output first output power, wherein the first output power meets a first limit curve; s3, acquiring and judging the real-time temperature of the charger, and adjusting the output power of the charger to enable the charger to output second output power, wherein the second output power meets a second limit curve; s4, acquiring the current battery voltage of a battery to be charged connected with the charger, and adjusting the output current of the charger according to a third limiting curve; and S5, acquiring and judging the current temperature of the battery to be charged, and adjusting the output power of the charger to enable the charger to output a third output power, wherein the third output power meets a fourth limit curve. The implementation of the invention can effectively ensure the safety of the whole charging process.

Description

Charging control method and system for charger
Technical Field
The invention relates to the technical field of charging, in particular to a charging control method and a charging control system of a charger.
Background
In the charging process of the vehicle-mounted charger, various use environments and working states can be met, and most of the existing vehicle-mounted chargers only consider one or a few working states to set the charging process so as to protect the charging process. In the actual use process, the possibility that various abnormal working conditions occur simultaneously exists, so that the normal working state of the vehicle-mounted charger cannot be met in the actual charging process, the abnormal state exists in the whole process when the vehicle-mounted charger works, and various potential safety hazards are brought.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a charging control method and system for a charger, aiming at some technical defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a charging control method of a charger is constructed, and the method comprises the following steps:
s1, pre-storing a first limit curve, a second limit curve, a third limit curve and a fourth limit curve;
s2, acquiring and judging input voltage of a charger, and when the input voltage of the charger meets a first preset range, adjusting output power of the charger to enable the charger to output first output power, wherein the first output power meets the first limit curve;
s3, acquiring and judging the real-time temperature of the charger, and when the real-time temperature of the charger meets a second preset range, adjusting the output power of the charger to enable the charger to output second output power, wherein the second output power meets a second limit curve;
s4, acquiring the current battery voltage of a battery to be charged connected with the charger, and adjusting the output current of the charger according to the current battery voltage of the battery to be charged and the third limit curve;
and S5, acquiring and judging the current temperature of the battery to be charged, and when the current temperature of the battery to be charged meets a third preset range, adjusting the output power of the charger to enable the charger to output a third output power, wherein the third output power meets the fourth limit curve.
Preferably, the charging control method of the charger of the present invention further includes one or more of the following steps:
s21, when the input voltage of the fixed charger exceeds the first preset range, turning off the charger;
s31, when the real-time temperature of the charger exceeds a second preset range, turning off the charger;
and S51, when the current temperature of the battery to be charged exceeds the third preset range, turning off the charger.
Preferably, the first limit curve satisfies:
Figure BDA0002938517630000021
wherein, P1Is the first output power, PmaxIs the rated power of the charger, v is the input voltage of the charger, Kp、Kp1And Kp2Are all constant, V0、V1、V2And V3Are all within the first preset range.
Preferably, KpTo set the derating coefficient, and 0 < Kp≤1，Kp1＝(1-Kp)*Pmax/25，Kp2＝(4.4*Kp-3.4)*Pmax。
Preferably, the second limit curve satisfies:
Figure BDA0002938517630000022
wherein, P2Is the second output power, PmaxIs the rated power of the charger, T is the real-time temperature of the charger, Kp3、Kp4、Kp5、Kp6And Kp7Are all constant, T0、T1、T2And T3Are all within the second preset range.
Preferably, Kp3To set the derating coefficient, and 0 < Kp3≤1，Kp4＝(Kp3-1)*Pmax/10，Kp5＝(1.7-0.7*Kp3)*Pmax，Kp6＝(1-Kp3)*Pmax/35，Kp7＝PmaxIn which P ismaxThe rated power of the charger.
Preferably, the third limiting curve satisfies:
Figure BDA0002938517630000031
wherein, I is the output current of the charger, v' is the current battery voltage, ImaxIs rated current of the charger, V0'、V1'、V2' and V3All within the charging voltage range of the battery to be charged, Kp8、Kp9、Kp10、Kp11And Kp12Are all constants.
Preferably, Kp10Is a current limiting coefficient, and 0 < Kp10≤1，Kp8＝(Pmax/Umax-Imax)/6，Kp9＝4*Imax-79.2，Kp11＝Imax*(1-Kp10)/5，Kp12＝(4*Kp10-3)*Imax。
10. The charging control method of the charger according to claim 1, wherein the fourth limiting curve satisfies:
Figure BDA0002938517630000032
wherein, P3For the third output power, T' is the current temperature of the battery to be charged, T0' and T1All within the third predetermined range, PtIs electricitySet output power, K, of the charger when the temperature of the battery is setp14And Kp15Are all constants.
Preferably, Kp14＝Pt*(1-Kp13)/10，Kp15＝(4*KP13-3)*PtIn which K isp13Is a derating coefficient and 0 < Kp13≤1。
The invention also constructs a charger charging control system, which comprises:
the storage unit is used for prestoring a first limit curve, a second limit curve, a third limit curve and a fourth limit curve;
the first execution unit is used for acquiring and judging the input voltage of a charger, and when the input voltage of the charger meets a first preset range, adjusting the output power of the charger to enable the charger to output first output power, wherein the first output power meets the first limit curve;
the second execution unit is used for acquiring and judging the real-time temperature of the charger, and when the real-time temperature of the charger meets a second preset range, adjusting the output power of the charger to enable the charger to output a second output power, wherein the second output power meets a second limit curve;
the third execution unit is used for acquiring the current battery voltage of a battery to be charged connected with the charger and regulating the output current of the charger according to the current battery voltage of the battery to be charged and the third limit curve;
and the fourth execution unit is used for acquiring and judging the current temperature of the battery to be charged, and when the current temperature of the battery to be charged meets a third preset range, adjusting the output power of the charger to enable the charger to output a third output power, wherein the third output power meets the fourth limit curve.
The charging control method and the charging control system of the charger have the following beneficial effects that: the safety of the whole charging process can be effectively guaranteed.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a flowchart of a charging control method of a charger according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment of a first constraint curve in the present invention;
FIG. 3 is a schematic diagram of another embodiment of a first constraint curve in the present invention;
FIG. 4 is a diagram illustrating an embodiment of a second constraint curve according to the present invention;
FIG. 5 is a schematic diagram of another embodiment of a second restriction curve in the present invention;
FIG. 6 is a schematic diagram of an embodiment of a third constraint curve in the present invention;
FIG. 7 is a schematic diagram of another embodiment of a third restriction curve in the present invention;
FIG. 8 is a schematic diagram of an embodiment of a fourth limiting curve according to the present invention;
FIG. 9 is a schematic diagram of another embodiment of a fourth restriction curve in the present invention;
fig. 10 is a logic block diagram of an embodiment of a charging control system of a charger according to the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, in a first embodiment of a charging control method of a charger according to the present invention, the method includes the following steps: s1, pre-storing a first limit curve, a second limit curve, a third limit curve and a fourth limit curve; s2, acquiring and judging input voltage of a charger, and when the input voltage of the charger meets a first preset range, adjusting output power of the charger to enable the charger to output first output power, wherein the first output power meets the first limit curve; s3, acquiring and judging the real-time temperature of the charger, and when the real-time temperature of the charger meets a second preset range, adjusting the output power of the charger to enable the charger to output second output power, wherein the second output power meets a second limit curve; s4, acquiring the current battery voltage of a battery to be charged connected with the charger, and adjusting the output current of the charger according to the current battery voltage of the battery to be charged and the third limit curve; and S5, acquiring and judging the current temperature of the battery to be charged, and when the current temperature of the battery to be charged meets a third preset range, adjusting the output power of the charger to enable the charger to output a third output power, wherein the third output power meets the fourth limit curve. The specific process is that different limiting curves, namely a first limiting curve, a second limiting curve, a third limiting curve and a fourth limiting curve, are preset according to the characteristics of the charger, so that when the charger works, the parameters of the charger do not exceed the corresponding limiting curves. When the charging starts to work, the input voltage of the charger is judged, and when the input voltage of the charger meets a certain range, the output power of the charger is adjusted according to a first limiting curve, namely the output power of the charger is adjusted according to the input voltage of the charger to obtain first output power, so that the charger works in a more ideal state, and internal devices of the charger are protected. After the charging starts to work, in the charging process, the temperature of the charger is monitored in real time to obtain the real-time temperature of the charger, the real-time temperature is judged, and when the real-time temperature of the charger meets a certain range, the output power of the charger is adjusted according to a second limiting curve. In the further charging process, the battery voltage of the battery to be charged connected with the charger is monitored to obtain the current battery voltage of the battery to be charged, and the output current of the charger is adjusted according to the obtained current battery voltage and the third limiting curve to ensure that the output current of the charger is adjusted to enable the charger to work in the optimal state when the output power meets the requirement. And finally, monitoring the temperature of the rechargeable battery to obtain the current temperature of the rechargeable battery, judging the current temperature, and regulating the output power of the charger again according to a fourth limiting curve when the current temperature of the battery to be charged meets a third preset range to obtain third output power. After the adjustment, the final output power of the charger is obtained. It can be understood that the first output power satisfying the first limit curve may be set to be a limit range where the first output power does not exceed the first limit curve, the second output power satisfying the second limit curve may be set to be a limit range where the second output power does not exceed the second limit curve, and adjusting the output current of the charger according to the third limit curve may also be understood as obtaining an output current of the charger that does not exceed the limit range of the third limit curve. The third output power satisfying the fourth limit curve may be set such that the third output power does not exceed the limit range of the fourth limit curve. And the optimal working state of the charger is ensured by setting a limiting curve.
Optionally, the charging control method of the charger of the present invention further includes one or more of the following steps: s21, when the input voltage of the fixed charger exceeds the first preset range, turning off the charger; s31, when the real-time temperature of the charger exceeds a second preset range, turning off the charger; and S51, when the current temperature of the battery to be charged exceeds the third preset range, turning off the charger. Specifically, when the input voltage of the charger is determined, the charger is directly turned off when the input voltage of the charger exceeds a first preset range, so that the charger is protected. The turn-off can turn off the input of the charger and also turn off the output of the charger. When the real-time temperature of the charger is monitored, the charger is directly turned off when the real-time temperature of the charger exceeds a second preset range, so that the charger is protected. The shutdown of the charger is understood herein to be the shutdown of the output of the charger. When the current temperature of the battery to be charged is monitored, the output of the charger is directly turned off when the current temperature of the battery to be charged does not meet a third preset range, namely when the current temperature is abnormal. The above processes may be arranged in any single or combination.
As shown in fig. 2, in an embodiment, the first constraint curve satisfies:
Figure BDA0002938517630000061
wherein, P1Is the first output power, PmaxIs the rated power of the charger, v is the input voltage of the charger, Kp、Kp1And Kp2Are all constant, V0、V1、V2And V3Are all within the first preset range. The limiting curve corresponding to the first output power satisfies the formula, wherein the input voltage of the charger is in different ranges, and the limiting curve corresponds to different relational expressions. Wherein, V0、V1、V2、V3Is constant, as shown in fig. 3, for a general charger, where V0Can be 80V, V1May be 85V, V2May be 110V, V3May be 280V. KpTo set the derating coefficient, and 0 < Kp≤1，Kp1＝(1-Kp)*Pmax/25，Kp2＝(4.4*Kp-3.4)*Pmax. In a specific embodiment KpThe value is 0.6.
As shown in fig. 4, the second limit curve satisfies:
Figure BDA0002938517630000071
wherein, P2Is the second output power, PmaxIs the rated power of the charger, T is the real-time temperature of the charger, Kp3、Kp4、Kp5、Kp6And Kp7Are all constant, T0、T1、T2And T3Are all within the second preset range. The limiting curve of the second output power meets the above formula, and when the real-time temperature of the charger is in different ranges, the corresponding relational expressions are different. Wherein T is0、T1、T2And T3All are constants, as shown in FIG. 5, for a general charger, where T0Can be at-35 deg.C and T1Can be at 0℃,T2Can be 70 ℃ T3May be 80 deg.c. Wherein, Kp3To set the derating coefficient, and 0 < Kp3≤1，Kp4＝(Kp3-1)*Pmax/10，Kp5＝(1.7-0.7*Kp3)*Pmax，Kp6＝(1-Kp3)*Pmax/35，Kp7＝PmaxIn which P ismaxThe rated power of the charger. In a specific embodiment Kp3The value is 0.4.
As shown in fig. 6, the third restriction curve satisfies:
Figure BDA0002938517630000072
wherein, I is the output current of the charger, v' is the current battery voltage, ImaxIs rated current of the charger, V0'、V1'、V2' and V3All within the charging voltage range of the battery to be charged, Kp8、Kp9、Kp10、Kp11And Kp12Are all constants. That is, the limiting curve of the output current of the charger satisfies the above formula, and when the voltage of the battery to be charged is in different ranges, the corresponding relational expressions are different. Wherein, V0'、V1'、V2' and V3' is constant, as shown in FIG. 7, for a specific embodiment, where V0' can be 15V, V1' may be 20V, V2' may be 24V, V3' may be 30V. In practical use, the battery voltage range is wide, and can be several volts to several hundred volts, so that the above value can be selected to be a proper value according to practical application. Wherein, Kp10Is a current limiting coefficient, and 0 < Kp10≤1，Kp8＝(Pmax/Umax-Imax)/6，Kp9＝4*Imax-79.2，Kp11＝Imax*(1-Kp10)/5，Kp12＝(4*Kp10-3)*Imax. For a specific embodiment, Kp10The value is 0.25.
As shown in fig. 8, the fourth limiting curve satisfies:
Figure BDA0002938517630000081
wherein, P3For the third output power, T' is the current temperature of the battery to be charged, T0' and T1All within the third predetermined range, PtFor setting the output power, K, of the charger at a set temperature for the batteryp14And Kp15Are all constants. Wherein, T0' and T1' constant, as shown in FIG. 9, for a general charger, where T0' may be 40 ℃ T1' may be 50 ℃. Wherein, Kp14＝Pt*(1-Kp13)/10，Kp15＝(4*KP13-3)*PtIn which K isp13Is a derating coefficient and 0 < Kp13Less than or equal to 1. In a specific embodiment, Kp13The value of (d) may be 0.25. PtThe output power of the charger may be a value obtained after the output power of the charger is limited according to a curve in the front. In one embodiment, it may be set to the set output power of the charger when the battery is at 39 ℃.
In addition, as shown in fig. 10, the charging control system of the charger of the present invention includes:
a storage unit 110 for pre-storing a first limit curve, a second limit curve, a third limit curve and a fourth limit curve;
the first execution unit 120 is configured to obtain and determine an input voltage of a charger, and when the input voltage of the charger meets a first preset range, adjust output power of the charger to enable the charger to output first output power, where the first output power meets the first limit curve;
the second execution unit 130 is configured to obtain and determine a real-time temperature of the charger, and when the real-time temperature of the charger meets a second preset range, adjust output power of the charger to enable the charger to output a second output power, where the second output power meets a second limit curve;
a third executing unit 140, configured to obtain a current battery voltage of a battery to be charged connected to the charger, and adjust an output current of the charger according to the third limiting curve according to the current battery voltage of the battery to be charged;
a fourth executing unit 150, configured to obtain and determine a current temperature of the battery to be charged, and when the current temperature of the battery to be charged meets a third preset range, adjust output power of the charger so that the charger outputs a third output power, where the third output power meets the fourth limit curve. Specifically, for a specific coordination operation process among units of the charger charging control system, reference may be made to the charger charging control method, which is not described herein again.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.

Claims (11)

1. A charging control method of a charger is characterized by comprising the following steps:
s1, pre-storing a first limit curve, a second limit curve, a third limit curve and a fourth limit curve;
s2, acquiring and judging input voltage of a charger, and when the input voltage of the charger meets a first preset range, adjusting output power of the charger to enable the charger to output first output power, wherein the first output power meets the first limit curve;
s3, acquiring and judging the real-time temperature of the charger, and when the real-time temperature of the charger meets a second preset range, adjusting the output power of the charger to enable the charger to output second output power, wherein the second output power meets a second limit curve;
s4, acquiring the current battery voltage of a battery to be charged connected with the charger, and adjusting the output current of the charger according to the current battery voltage of the battery to be charged and the third limit curve;
and S5, acquiring and judging the current temperature of the battery to be charged, and when the current temperature of the battery to be charged meets a third preset range, adjusting the output power of the charger to enable the charger to output a third output power, wherein the third output power meets the fourth limit curve.
2. The charging control method according to claim 1, characterized in that the method further comprises one or more of the following steps:
s21, when the input voltage of the fixed charger exceeds the first preset range, turning off the charger;
s31, when the real-time temperature of the charger exceeds a second preset range, turning off the charger;
and S51, when the current temperature of the battery to be charged exceeds the third preset range, turning off the charger.
3. The charging control method of the charger according to claim 1, wherein the first limiting curve satisfies:
Figure FDA0002938517620000011
wherein, P1Is the first output power, PmaxIs the rated power of the charger, v is the input of the chargerVoltage, Kp、Kp1And Kp2Are all constant, V0、V1、V2And V3Are all within the first preset range.
4. The charging control method of the charger according to claim 3, characterized in that KpTo set the derating coefficient, and 0 < Kp≤1，Kp1＝(1-Kp)*Pmax/25，Kp2＝(4.4*Kp-3.4)*Pmax。
5. The charging control method of the charger according to claim 1, wherein the second limiting curve satisfies:
Figure FDA0002938517620000021
wherein, P2Is the second output power, PmaxIs the rated power of the charger, T is the real-time temperature of the charger, Kp3、Kp4、Kp5、Kp6And Kp7Are all constant, T0、T1、T2And T3Are all within the second preset range.
6. The charging control method of the charger according to claim 5, characterized in that Kp3To set the derating coefficient, and 0 < Kp3≤1，Kp4＝(Kp3-1)*Pmax/10，Kp5＝(1.7-0.7*Kp3)*Pmax，Kp6＝(1-Kp3)*Pmax/35，Kp7＝PmaxIn which P ismaxThe rated power of the charger.
7. The charging control method of the charger according to claim 1, wherein the third limiting curve satisfies:
Figure FDA0002938517620000022
wherein, I is the output current of the charger, v' is the current battery voltage, ImaxIs rated current of the charger, V0'、V1'、V2' and V3All within the charging voltage range of the battery to be charged, Kp8、Kp9、Kp10、Kp11And Kp12Are all constants.
8. The charging control method of the charger according to claim 7, characterized in that Kp10Is a current limiting coefficient, and 0 < Kp10≤1，Kp8＝(Pmax/Umax-Imax)/6，Kp9＝4*Imax-79.2，Kp11＝Imax*(1-Kp10)/5，Kp12＝(4*Kp10-3)*Imax。
9. The charging control method of the charger according to claim 1, wherein the fourth limiting curve satisfies:
Figure FDA0002938517620000031
wherein, P3For the third output power, T' is the current temperature of the battery to be charged, T0' and T1All within the third predetermined range, PtFor setting the output power, K, of the charger at a set temperature for the batteryp14And Kp15Are all constants.
10. The charging control method of the charger according to claim 9, characterized in that K isp14＝Pt*(1-Kp13)/10，Kp15＝(4*KP13-3)*PtIn which K isp13Is a derating coefficient and 0 < Kp13≤1。
11. The utility model provides a quick-witted charge control system that charges which characterized in that includes:
the storage unit is used for prestoring a first limit curve, a second limit curve, a third limit curve and a fourth limit curve;
the first execution unit is used for acquiring and judging the input voltage of a charger, and when the input voltage of the charger meets a first preset range, adjusting the output power of the charger to enable the charger to output first output power, wherein the first output power meets the first limit curve;
the second execution unit is used for acquiring and judging the real-time temperature of the charger, and when the real-time temperature of the charger meets a second preset range, adjusting the output power of the charger to enable the charger to output a second output power, wherein the second output power meets a second limit curve;
the third execution unit is used for acquiring the current battery voltage of a battery to be charged connected with the charger and regulating the output current of the charger according to the current battery voltage of the battery to be charged and the third limit curve;
and the fourth execution unit is used for acquiring and judging the current temperature of the battery to be charged, and when the current temperature of the battery to be charged meets a third preset range, adjusting the output power of the charger to enable the charger to output a third output power, wherein the third output power meets the fourth limit curve.
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