CN113364089A - Charging method, charging device, electronic apparatus, storage medium, and charging circuit - Google Patents

Charging method, charging device, electronic apparatus, storage medium, and charging circuit Download PDF

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Publication number
CN113364089A
CN113364089A CN202110618254.XA CN202110618254A CN113364089A CN 113364089 A CN113364089 A CN 113364089A CN 202110618254 A CN202110618254 A CN 202110618254A CN 113364089 A CN113364089 A CN 113364089A
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China
Prior art keywords
voltage
charging
current
constant
cut
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Chinese (zh)
Inventor
陈佳
刘小勇
沈玲
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Meizu Technology Co Ltd
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Meizu Technology Co Ltd
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Priority to CN202110618254.XA priority Critical patent/CN113364089A/en
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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
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00036—Charger exchanging data with battery
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00302—Overcharge protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00306—Overdischarge protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
    • 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
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H02J7/00716—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current in response to integrated charge or discharge current
    • 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
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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

Abstract

The disclosure relates to a charging method, a charging device, an electronic apparatus, a storage medium, and a charging circuit. The charging method comprises the following steps: acquiring specification parameters of the battery cell; wherein the specification parameters include a rated voltage; determining a cut-off voltage of a constant current charging stage based on the specification parameters; wherein the cut-off voltage is greater than the rated voltage; acquiring real-time voltage in a constant current charging stage; judging whether the real-time voltage is equal to or greater than a cut-off voltage; and when the real-time voltage is equal to or greater than the cut-off voltage, switching the constant-current charging stage to the constant-voltage charging stage. According to the technical scheme provided by the embodiment of the disclosure, the battery can be charged to a saturated capacity in the constant current charging stage by improving the cut-off voltage in the constant current charging stage, so that the charging electric quantity in the constant voltage charging stage is less, the charging current is larger, the duration of the constant voltage charging stage is favorably shortened, the integral charging duration is shortened, and the charging efficiency is improved.

Description

Charging method, charging device, electronic apparatus, storage medium, and charging circuit
Technical Field
The present disclosure relates to the field of battery charging technologies, and in particular, to a charging method, a charging apparatus, an electronic device, a storage medium, and a charging circuit.
Background
The rechargeable battery is a rechargeable battery with limited charging times and can be matched with a charger for use. The battery can be reused by charging the battery, which is beneficial to economy and environmental protection. The charging process of a battery is the reverse of its discharging process, specifically, the process of converting electrical energy into chemical energy stored in the battery.
The conventional battery charging process usually adopts a process of Constant Current (CC) charging to Constant Voltage (CV) charging. In the constant-voltage charging stage, the charging capacity is small, but the charging speed is low due to the small charging current in the stage, and the charging time is long, so that the whole charging time is long.
Disclosure of Invention
In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a charging method, an apparatus, an electronic device, a storage medium, and a charging circuit capable of shortening the entire charging time (i.e., a time period).
The present disclosure provides a charging method, the method comprising:
acquiring specification parameters of the battery cell; wherein the specification parameters include a rated voltage;
determining a cut-off voltage of a constant current charging stage based on the specification parameters; wherein the cutoff voltage is greater than the rated voltage;
acquiring real-time voltage in a constant current charging stage;
judging whether the real-time voltage is equal to or greater than the cut-off voltage;
and when the real-time voltage is equal to or greater than the cut-off voltage, switching the constant-current charging stage to the constant-voltage charging stage.
In some embodiments, prior to determining the cutoff voltage for the constant current charging phase, the method further comprises:
obtaining a gain coefficient; wherein the gain coefficient M is greater than 100% and less than or equal to 105%;
wherein the determining the cut-off voltage of the constant current charging phase comprises:
determining the cutoff voltage based on the nominal voltage and the gain factor.
In some embodiments, the method further comprises:
setting a cut-off current in a constant voltage charging stage;
acquiring real-time current in a constant-voltage charging stage;
judging whether the real-time current is equal to or less than the cut-off current;
and stopping charging when the real-time current is equal to or less than the cut-off current.
In some embodiments, the off-current ICVThe value range is as follows: i is more than 0.05CCV≤0.20C；
Wherein C represents the battery capacity.
The present disclosure also provides a charging device, the device comprising:
the specification parameter acquisition module is used for acquiring the specification parameters of the battery cell; wherein the specification parameters include a rated voltage;
the cutoff voltage determining module is used for determining the cutoff voltage of the constant current charging stage based on the specification parameters; wherein the cutoff voltage is greater than the rated voltage;
the real-time voltage acquisition module is used for acquiring real-time voltage in a constant current charging stage;
the voltage comparison module is used for judging whether the real-time voltage is equal to or greater than the cut-off voltage;
and the charging switching module is used for switching the constant-current charging stage to the constant-voltage charging stage when the real-time voltage is equal to or greater than the cut-off voltage.
In some embodiments, the apparatus further comprises:
the gain coefficient acquisition module is used for acquiring a gain coefficient; wherein the gain coefficient M is greater than 100% and less than or equal to 105%;
the cutoff voltage determining module is specifically configured to:
determining the cutoff voltage based on the nominal voltage and the gain factor.
In some embodiments, the apparatus further comprises:
the cutoff current setting module is used for setting the cutoff current in the constant-voltage charging stage;
the real-time current acquisition module is used for acquiring real-time current in a constant-voltage charging stage;
the current comparison module is used for judging whether the real-time current is equal to or less than the cut-off current;
and the charging stopping module is used for stopping charging when the real-time current is equal to or less than the cut-off current.
The present disclosure also provides a charging circuit, the circuit including: the battery pack comprises a protection control integrated circuit, a first transistor, a second transistor, a first resistor, a second resistor, a third resistor and a battery cell;
the positive electrode of the battery cell is electrically connected with a first input end of the protection control integrated circuit and a first input end of the charging module control circuit, the negative electrode of the battery cell is electrically connected with one end of the first resistor and a second input end of the protection control integrated circuit, the other end of the first resistor is electrically connected with a third input end of the protection control integrated circuit and an output end of the first transistor, the input end of the first transistor is electrically connected with the output end of the second transistor, and the input end of the second transistor is connected with one end of the second resistor, one end of the third resistor and a second input end of the charging module control circuit; the control end of the first transistor is electrically connected with the first control end of the protection control integrated circuit, the control end of the second transistor is electrically connected with the second control end of the protection control integrated circuit, the other end of the second resistor is connected to the third input end of the charging module control circuit, and the other end of the third resistor is connected to the fourth input end of the charging module control circuit;
wherein the charging module control circuit is configured to perform any of the above methods.
The present disclosure also provides an electronic device, including:
a processor;
a memory for storing the processor-executable instructions;
the processor is configured to read the executable instructions from the memory and execute the instructions to implement any of the above methods.
The present disclosure also provides a storage medium storing a computer program for performing any of the above methods.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
in the charging method, the charging device, the electronic device, the storage medium, and the charging circuit provided in the embodiments of the present disclosure, the charging method includes: acquiring specification parameters of the battery cell; wherein the specification parameters include a rated voltage; determining a cut-off voltage of a constant current charging stage based on the specification parameters; wherein the cut-off voltage is greater than the rated voltage; acquiring real-time voltage in a constant current charging stage; judging whether the real-time voltage is equal to or greater than a cut-off voltage; when the real-time voltage is equal to or greater than the cut-off voltage, the constant-current charging stage is switched to the constant-voltage charging stage, which is equivalent to the improvement on the basis of the prior art, the cut-off voltage of the constant-current charging stage is improved, so that the battery can be charged to a saturated capacity in the constant-current charging stage, the charging electric quantity of the constant-voltage charging stage is less, the charging current is larger, the duration of the constant-voltage charging stage is favorably shortened, the overall charging duration is shortened, and the charging efficiency is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, 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 schematic flow chart of a charging method according to an embodiment of the disclosure;
FIG. 2 is a graph of current and voltage over time during a charging process provided by an embodiment of the present disclosure;
FIG. 3 is a comparative graph of a charging method provided by an embodiment of the present disclosure relative to a charging method of the prior art;
FIG. 4 is a partially enlarged view of a portion of the dashed frame portion of the graph shown in FIG. 3;
fig. 5 is a schematic structural diagram of a charging device according to an embodiment of the disclosure;
fig. 6 is a schematic structural diagram of a charging circuit according to an embodiment of the disclosure;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
The charging method provided by the embodiment of the disclosure can be applied to a constant current + constant voltage (namely, CC + CV) charging scene, and is used for shortening the total charging time of the battery and improving the charging efficiency. Specifically, the improvement point relative to the prior art is that: on the premise of ensuring the charging safety, the cut-off voltage in the constant voltage charging stage is increased, so that the battery is easily charged to a more saturated capacitance in the CC stage, and the battery is easily fully charged, thereby shortening the charging time; further, the off current at the CV stage can be increased to cut off the charging at a higher current, thereby further shortening the charging time.
The charging method, the charging apparatus, the electronic device, the storage medium, and the charging circuit provided by the embodiments of the disclosure are exemplarily described below with reference to fig. 1 to 7.
In some embodiments, fig. 1 is a schematic flowchart of a charging method provided in an embodiment of the present disclosure. Referring to fig. 1, the method may include:
and S110, obtaining specification parameters of the battery cell.
The specification parameters include a rated voltage, and may also include a size, a capacity, a rated operating current, and other parameters related to charging and discharging of the battery, which are known to those skilled in the art, and are not described or limited herein.
The specification parameters of the battery core can be associated with a battery identifier, and the battery identifier is used for distinguishing various batteries, and is equivalent to an identity identifier of the battery. Before the battery starts to be charged, the charging device may acquire the battery identifier and determine the specification parameters of the battery cell corresponding to the battery identifier based on the battery identifier. The specification parameters of the battery cell can be stored locally in the charging device or stored in the cloud, and are called based on the battery identifier. The battery may include other related circuits besides the battery core, which is described as an example in conjunction with fig. 6.
And S120, determining the cut-off voltage in the constant current charging stage based on the specification parameters.
Wherein the cut-off voltage is greater than the rated voltage.
Specifically, the constant current charging stage charges the battery with a constant current value, in which the voltage of the battery increases continuously, as shown in fig. 2, in the CC stage, the charging current is kept constant, and the charging voltage increases continuously, until the charging voltage reaches the cut-off voltage, the constant current charging stage is stopped, which will be described later with reference to S130-S150.
Compared with the prior art, the cut-off voltage in the constant-current charging stage is usually the rated voltage in the specification parameters, and the charging method provided by the embodiment of the disclosure improves the cut-off voltage in the constant-current charging stage, so that the battery is charged to a saturated capacity in the constant-current charging stage, the charging electric quantity in the constant-voltage charging stage is less, the charging current is larger, the duration of the constant-voltage charging stage is favorably shortened, the overall charging duration is shortened, and the charging efficiency is improved.
In combination with the above, the charging device can obtain the specification parameters of the battery, and set the cutoff voltage in the constant current charging stage to be greater than the rated voltage in the specification parameters when the battery supports the battery. The term "battery support" as used herein means that the battery can be charged safely without causing an abnormal loss in the life of the battery when the cutoff voltage is increased.
And S130, acquiring the real-time voltage in the constant current charging stage.
In the constant-current charging stage, the real-time voltage is continuously increased, and when the real-time voltage reaches the cut-off voltage, the constant-current charging stage is switched to the constant-voltage charging stage.
For example, a voltage detection circuit may be used to detect a real-time voltage of the battery and transmit the detected real-time voltage to the charging device; correspondingly, the charging device receives the real-time voltage, so that the acquisition of the real-time voltage is realized.
S140, judging whether the real-time voltage is equal to or greater than the cut-off voltage.
In the step, the charging device compares the cut-off voltage determined in the step with the acquired real-time voltage, and judges whether the real-time voltage reaches the cut-off voltage, that is, whether the real-time voltage is equal to or greater than the cut-off voltage; when the real-time voltage does not reach the cut-off voltage, the capacity of the battery is still small, and constant-current charging is maintained at the moment; when the real-time voltage reaches the cut-off voltage, that is, when the determination result is yes (Y), maintaining the constant-current charging may cause a safety risk, and at this time, the constant-current charging stage is switched to the constant-voltage charging stage, that is, the subsequent step S150.
And S150, switching the constant-current charging stage to the constant-voltage charging stage when the real-time voltage is equal to or greater than the cut-off voltage.
In combination with the above, when the charging device determines that the real-time voltage reaches the cut-off voltage, the constant-current charging is stopped, and the constant-voltage charging is started, that is, the constant-current charging stage is switched to the constant-voltage charging stage, as shown in fig. 2, in the constant-voltage charging stage, the charging voltage is kept constant, the charging current is continuously reduced, and the battery is fully charged until the charging current is 0; or when the charging current is less than a preset threshold, such as 0.02C or 0.05C, the battery is considered fully charged, where C represents the battery capacity.
Exemplarily, fig. 3 is a comparative graph of a charging method provided by an embodiment of the present disclosure with respect to a charging method in the prior art; fig. 4 is a partially enlarged schematic view of a dotted frame portion of the graph shown in fig. 3. Referring to fig. 3 and 4, taking a battery with a rated voltage of 4.40V as an example, in the prior art, during the constant current charging phase, the battery voltage will be charged to 4.40V, and then the constant voltage charging phase is entered, as shown by the curve L0. In the charging method provided by the embodiment of the present disclosure, the cut-off voltage in the constant current charging phase is increased, for example, the cut-off voltage in the constant current charging phase may be set to 4.45V or 4.5V, which respectively correspond to the curve L1 and the curve L2, where the front-stage curve of L1 is blocked by L2 due to partial overlap between L1 and L2. Comparing L1 and L2 with L0, respectively, it can be seen that by increasing the cut-off voltage of the constant current charging phase, the time of the constant current charging phase can be maintained longer, so that the battery can be charged to a more saturated capacity, which is beneficial to shortening the duration of constant voltage charging, shortening the total charging duration, and improving the charging efficiency.
In some embodiments, on the basis of fig. 1, before S120, the method further comprises:
and acquiring a gain coefficient.
Wherein the gain coefficient M is greater than 100% and less than or equal to 105%.
In particular, the gain factor may be a multiple of the cutoff voltage relative to the rated voltage, characterizing the degree to which the rated voltage is increased. In the embodiment of the disclosure, by setting the upper limit of the gain coefficient M to 105%, the increase of the cut-off voltage can be avoided, so that the influence on the safety and the service life of the battery is favorably reduced, and the charging safety is ensured while the charging duration is shortened.
For example, the value of the gain coefficient M may be 101%, 101.5%, 103%, 105%, or other times, which is neither described nor limited herein.
On this basis, determining the cut-off voltage of the constant current charging stage in S120 may include:
the cutoff voltage is determined based on the nominal voltage and the gain factor.
Specifically, the cut-off voltage can be obtained by multiplying a gain coefficient on the basis of the rated voltage; that is, the cutoff voltage is equal to the rated voltage × the gain factor.
In some embodiments, on the basis of fig. 1, the method further comprises:
setting a cut-off current in a constant voltage charging stage;
acquiring real-time current in a constant-voltage charging stage;
judging whether the real-time current is equal to or less than the cut-off current;
and stopping charging when the real-time current is equal to or less than the cut-off current.
In the constant voltage charging stage, the battery is charged with a smaller current, and the charging current becomes smaller as the charging time continues, as shown in fig. 2. When the charging power is small to a certain extent, i.e., less than or equal to the cutoff current, the charging is stopped, and thus, the CC + CV charging is completed.
For example, the charging device may determine the cutoff current of the constant voltage charging stage based on the specification parameters of the battery cell at the same time as, in the previous step, or in the subsequent step, when the specification parameters of the battery cell are acquired.
For example, the real-time current may be detected using a current detection circuit and sent to the charging device; correspondingly, the charging device receives the real-time current, compares the real-time current with the determined cutoff current, and stops charging when the real-time current is reduced to be less than or equal to the cutoff current.
Optionally, in the charging method provided in the embodiment of the present disclosure, compared with the prior art, on the basis of improving the cut-off voltage in the constant current charging stage, the cut-off current in the constant voltage charging stage is also increased, so that the total time of charging the battery is shortened by reducing the time length in the constant voltage charging stage, the charging efficiency is improved, and the user experience is improved.
In some embodiments, the off-current ICVThe value range is as follows: i is more than 0.05CCVLess than or equal to 0.20 ℃; wherein C represents the battery capacity.
Illustratively, in combination with the above, the charging device may set the cutoff voltage to 4.45V and the cutoff current to 0.17C based on the specification parameters of the cell of 4.40V and 4000 mAH; the real-time voltage is monitored and when it reaches 4.45V, the CC stage is switched to the CV stage. After entering the CV stage, the battery is charged with a small current, and the charging current is smaller and smaller; and when the real-time current reaches 0.17C, the charging is cut off. Compared with the prior art that the charging is cut off at 0.02C (corresponding to 80mA, namely 0.02 × 4000) or 0.05C (corresponding to 200mA, namely 0.05 × 4000), the charging method provided by the embodiment of the disclosure raises the charging current to 680mA (namely 0.17 × 4000) to stop, which is equivalent to ending the charging in advance, thereby shortening the charging time period.
In conjunction with fig. 3 and 4, the voltage at the end of the charging phase is relatively high due to the increase in the cutoff voltage of the constant current charging phase. However, the time that the battery is under a higher voltage is short, i.e., the voltage after the battery is left standing, falls back to the same level as the prior art, thereby ensuring the safety of the battery.
According to the charging method provided by the embodiment of the disclosure, the cut-off voltage in the constant-current charging stage is increased, the cut-off current in the constant-voltage charging stage is increased, and the constant-voltage charging time is integrally reduced, so that the total charging time is shortened. Therefore, the problems of low charging speed, long charging time and low charging efficiency caused by low charging current in a constant voltage charging stage in the prior art are well solved.
The embodiment of the present disclosure further provides a charging device, which can be used to execute the steps of any one of the charging methods in the foregoing embodiments, so as to achieve corresponding beneficial effects.
Exemplarily, fig. 5 is a schematic structural diagram of a charging device provided in an embodiment of the present disclosure. Referring to fig. 5, the apparatus may include:
a specification parameter obtaining module 510, configured to obtain specification parameters of the battery cell; wherein the specification parameters include a rated voltage;
a cut-off voltage determination module 520, configured to determine a cut-off voltage of the constant current charging stage based on the specification parameter; wherein the cut-off voltage is greater than the rated voltage;
a real-time voltage obtaining module 530, configured to obtain a real-time voltage in the constant current charging stage;
a voltage comparison module 540, configured to determine whether the real-time voltage is equal to or greater than a cut-off voltage;
and a charging switching module 550, configured to switch the constant-current charging stage to the constant-voltage charging stage when the real-time voltage is equal to or greater than the cut-off voltage.
According to the charging device provided by the embodiment of the disclosure, the specification parameters of the battery cell can be acquired through the cooperative coordination among the functional modules; wherein the specification parameters include a rated voltage; determining a cut-off voltage of a constant current charging stage based on the specification parameters; wherein the cut-off voltage is greater than the rated voltage; acquiring real-time voltage in a constant current charging stage; judging whether the real-time voltage is equal to or greater than a cut-off voltage; when the real-time voltage is equal to or greater than the cut-off voltage, the constant-current charging stage is switched to the constant-voltage charging stage, which is equivalent to the improvement on the basis of the prior art, the cut-off voltage of the constant-current charging stage is improved, so that the battery can be charged to a saturated capacity in the constant-current charging stage, the charging electric quantity of the constant-voltage charging stage is less, the charging current is larger, the duration of the constant-voltage charging stage is favorably shortened, the overall charging duration is shortened, and the charging efficiency is improved.
In some embodiments, on the basis of fig. 5, the apparatus may further include:
the gain coefficient acquisition module is used for acquiring a gain coefficient; wherein the gain coefficient M is greater than 100% and less than or equal to 105%.
Based on this, the cut-off voltage determining module 520 may be specifically configured to:
the cutoff voltage is determined based on the nominal voltage and the gain factor.
By the arrangement, the total charging time can be shortened, the charging efficiency is improved, and meanwhile, the safety of the battery is ensured.
In some embodiments, on the basis of fig. 5, the apparatus may further include:
the cutoff current setting module is used for setting the cutoff current in the constant-voltage charging stage;
the real-time current acquisition module is used for acquiring real-time current in a constant-voltage charging stage;
the current comparison module is used for judging whether the real-time current is equal to or less than the cut-off current;
and the charging stopping module is used for stopping charging when the real-time current is equal to or less than the cut-off current. Optionally, cutoff of current ICVThe value range is as follows: i is more than 0.05CCVLess than or equal to 0.20 ℃; wherein C represents the battery capacity.
So set up, can further shorten the duration in the constant voltage charging stage among the charging process, be favorable to shortening the total length of charging, improve charge efficiency.
The device provided by the embodiment of the disclosure can execute the method provided by any embodiment of the disclosure, and has the corresponding functional modules and beneficial effects of the execution method.
The embodiment of the disclosure further provides a charging circuit, which can charge the battery based on any one of the above charging methods, so that the charging time of the battery can be shortened, and the charging efficiency can be improved.
In some embodiments, fig. 6 is a schematic structural diagram of a charging circuit provided in an embodiment of the present disclosure. Referring to fig. 6, the charging circuit may include: the battery pack 60 comprises a protection control integrated circuit 601, a first transistor 602, a second transistor 603, a first resistor 604, a second resistor 605, a third resistor 606 and a battery cell 600; the positive electrode of the battery cell 600 is electrically connected to a first input terminal of the protection control integrated circuit 601 and a first input terminal of the charging module control circuit 61, the negative electrode of the battery cell 600 is electrically connected to one end of the first resistor 604 and a second input terminal of the protection control integrated circuit 601, the other end of the first resistor 604 is electrically connected to a third input terminal of the protection control integrated circuit 601 and an output terminal of the first transistor 602, the input terminal of the first transistor 602 is electrically connected to the output terminal of the second transistor 603, and the input terminal of the second transistor 603 is connected to one end of the second resistor 605, one end of the third resistor 606, and a second input terminal of the charging module control circuit 61; the control end of the first transistor 602 is electrically connected to the first control end of the protection control integrated circuit 601, the control end of the second transistor 603 is electrically connected to the second control end of the protection control integrated circuit 601, the other end of the second resistor 605 is connected to the third input end of the charging module control circuit 61, and the other end of the third resistor 606 is connected to the fourth input end of the charging module control circuit 61; wherein the charging module control circuit 61 is configured to perform any of the above-described methods.
The first transistor 602 and the second transistor 603 are protection transistors, and are configured to cut off a loop where the battery is located when the battery is abnormally charged or discharged, so as to protect the battery cell 600. The first resistor 604 is a sampling resistor, and is configured to detect a current flowing through the battery cell 600; the second resistor 605 and the third resistor 606 are pull-down resistors and are used for realizing battery identification detection and temperature detection in a matching manner; the protection control integrated circuit 601 is configured to control the first transistor 602 and the second transistor 603 to protect the battery cell 600 during charging and discharging, and the charging module control circuit 61 is configured to implement switching of a charging stage and control of a charging voltage and a charging current.
Wherein the charging module control circuit 61 detects the voltage between P + and P-i.e. the battery voltage in real time by means of the ADC circuit. The charging module control circuit 61 sets the off-voltage in the constant-current charging stage and the off-current in the constant-voltage charging stage. As an example of a 4.40V, 4000mAH battery, the cutoff voltage may be set to 4.45V (or 4.5V), and the cutoff current may be set to 0.17C, corresponding to 680mA, which may be determined based on the specification parameters of the cell. In the constant-current charging stage, when the real-time voltage of the battery reaches 4.45V (or 4.5V), the battery is controlled to enter the constant-voltage charging stage, the charging current is gradually reduced, and when the real-time current, namely the charging current reaches 680mA, the charging is stopped.
Illustratively, the protection control integrated circuit 601 in the battery pack 60 may further include circuit modules such as an overcharge voltage detection module, an overcharge current detection module, an overdischarge voltage detection module, an overdischarge current detection module, a short circuit detection module, a control logic module, a delay circuit module, and an oscillation circuit module, so as to implement abnormality detection and control and ensure battery safety.
In the charging circuit provided by the embodiment of the disclosure, the cut-off voltage in the constant-current charging stage is increased, the cut-off current in the constant-voltage charging stage is increased, the charging time is shortened, and the charging efficiency is improved; meanwhile, the battery under the working principle can meet the temperature requirement through normal temperature circulation, and has no obvious difference from the conventional charging environment.
In other embodiments, the charging method provided by the embodiments of the present disclosure may also be applied to other charging circuits known to those skilled in the art, so as to shorten the total charging time of the battery and improve the charging efficiency.
An embodiment of the present disclosure further provides an electronic device, including: a processor and a memory for storing processor-executable instructions; the processor is used for reading the executable instructions from the memory and executing the instructions to realize the steps of any one of the methods, and the corresponding beneficial effects are realized.
In some embodiments, fig. 7 is a schematic structural diagram of an electronic device provided in an embodiment of the present disclosure. Referring to fig. 7, the electronic device 400 includes one or more processors 401 and memory 402.
The processor 401 may be a Central Processing Unit (CPU) or other form of processing unit having data processing capabilities and/or instruction execution capabilities, and may control other components in the electronic device 400 to perform desired functions.
Memory 402 may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, Random Access Memory (RAM), cache memory (cache), and/or the like. The non-volatile memory may include, for example, Read Only Memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium and executed by processor 401 to implement the charging methods of the embodiments of the present disclosure described above and/or other desired functions. Various contents such as an input signal, a signal component, a noise component, etc. may also be stored in the computer-readable storage medium.
In one example, the electronic device 400 may further include: an input device 403 and an output device 404, which are interconnected by a bus system and/or other form of connection mechanism (not shown).
The input device 403 may also include, for example, a keyboard, a mouse, and the like.
The output device 404 may output various information to the outside, including the determined distance information, direction information, and the like. The output devices 404 may include, for example, a display, speakers, a printer, and a communication network and its connected remote output devices, among others.
Of course, for simplicity, only some of the components of the electronic device 400 relevant to the present disclosure are shown in fig. 7, omitting components such as buses, input/output interfaces, and the like. In addition, electronic device 400 may include any other suitable components depending on the particular application.
In addition to the above methods and apparatus, embodiments of the present disclosure may also be a computer program product comprising computer program instructions that, when executed by a processor, cause the processor to perform a charging method provided by embodiments of the present disclosure.
The computer program product may write program code for carrying out operations for embodiments of the present disclosure in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server.
Furthermore, embodiments of the present disclosure may also be a computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, cause the processor to perform the charging method provided by embodiments of the present disclosure.
The computer-readable storage medium may take any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may include, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
It is noted that, in this document, 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 foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. 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 disclosure. Thus, the present disclosure 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 (10)

1. A method of charging, comprising:
acquiring specification parameters of the battery cell; wherein the specification parameters include a rated voltage;
determining a cut-off voltage of a constant current charging stage based on the specification parameters; wherein the cutoff voltage is greater than the rated voltage;
acquiring real-time voltage in a constant current charging stage;
judging whether the real-time voltage is equal to or greater than the cut-off voltage;
and when the real-time voltage is equal to or greater than the cut-off voltage, switching the constant-current charging stage to the constant-voltage charging stage.
2. The method of claim 1, wherein prior to determining the cutoff voltage for the constant current charging phase, further comprising:
obtaining a gain coefficient; wherein the gain coefficient M is greater than 100% and less than or equal to 105%;
wherein the determining the cut-off voltage of the constant current charging phase comprises:
determining the cutoff voltage based on the nominal voltage and the gain factor.
3. The method of claim 1, further comprising:
setting a cut-off current in a constant voltage charging stage;
acquiring real-time current in a constant-voltage charging stage;
judging whether the real-time current is equal to or less than the cut-off current;
and stopping charging when the real-time current is equal to or less than the cut-off current.
4. Method according to claim 3, characterized in that the off-current I isCVThe value range is as follows: i is more than 0.05CCV≤0.20C；
Wherein C represents the battery capacity.
5. A charging device, comprising:
the specification parameter acquisition module is used for acquiring the specification parameters of the battery cell; wherein the specification parameters include a rated voltage;
the cutoff voltage determining module is used for determining the cutoff voltage of the constant current charging stage based on the specification parameters; wherein the cutoff voltage is greater than the rated voltage;
the real-time voltage acquisition module is used for acquiring real-time voltage in a constant current charging stage;
the voltage comparison module is used for judging whether the real-time voltage is equal to or greater than the cut-off voltage;
and the charging switching module is used for switching the constant-current charging stage to the constant-voltage charging stage when the real-time voltage is equal to or greater than the cut-off voltage.
6. The apparatus of claim 1, further comprising:
the gain coefficient acquisition module is used for acquiring a gain coefficient; wherein the gain coefficient M is greater than 100% and less than or equal to 105%;
the cutoff voltage determining module is specifically configured to:
determining the cutoff voltage based on the nominal voltage and the gain factor.
7. The apparatus of claim 1, further comprising:
the cutoff current setting module is used for setting the cutoff current in the constant-voltage charging stage;
the real-time current acquisition module is used for acquiring real-time current in a constant-voltage charging stage;
the current comparison module is used for judging whether the real-time current is equal to or less than the cut-off current;
and the charging stopping module is used for stopping charging when the real-time current is equal to or less than the cut-off current.
8. A charging circuit, comprising: the battery pack comprises a protection control integrated circuit, a first transistor, a second transistor, a first resistor, a second resistor, a third resistor and a battery cell;
the positive electrode of the battery cell is electrically connected with a first input end of the protection control integrated circuit and a first input end of the charging module control circuit, the negative electrode of the battery cell is electrically connected with one end of the first resistor and a second input end of the protection control integrated circuit, the other end of the first resistor is electrically connected with a third input end of the protection control integrated circuit and an output end of the first transistor, the input end of the first transistor is electrically connected with the output end of the second transistor, and the input end of the second transistor is connected with one end of the second resistor, one end of the third resistor and a second input end of the charging module control circuit; the control end of the first transistor is electrically connected with the first control end of the protection control integrated circuit, the control end of the second transistor is electrically connected with the second control end of the protection control integrated circuit, the other end of the second resistor is connected to the third input end of the charging module control circuit, and the other end of the third resistor is connected to the fourth input end of the charging module control circuit;
wherein the charging module control circuit is configured to perform the method of any of the preceding claims 1 to 4.
9. An electronic device, characterized in that the electronic device comprises:
a processor;
a memory for storing the processor-executable instructions;
the processor is configured to read the executable instructions from the memory and execute the instructions to implement the method of any one of claims 1 to 4.
10. A storage medium, characterized in that it stores a computer program for executing the method of any of the preceding claims 1 to 4.
CN202110618254.XA 2021-06-03 2021-06-03 Charging method, charging device, electronic apparatus, storage medium, and charging circuit Pending CN113364089A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023193460A1 (en) * 2022-04-08 2023-10-12 荣耀终端有限公司 Battery control circuit, electronic device, and charging control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023193460A1 (en) * 2022-04-08 2023-10-12 荣耀终端有限公司 Battery control circuit, electronic device, and charging control method

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