CN111682599A - Charging control method, device and system for lithium battery - Google Patents
Charging control method, device and system for lithium battery Download PDFInfo
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- CN111682599A CN111682599A CN202010392386.0A CN202010392386A CN111682599A CN 111682599 A CN111682599 A CN 111682599A CN 202010392386 A CN202010392386 A CN 202010392386A CN 111682599 A CN111682599 A CN 111682599A
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- lithium battery
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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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
- H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
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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
-
- 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
- H02J7/007186—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage obtained with the battery disconnected from the charge or discharge circuit
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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 invention relates to the technical field of intelligent control, in particular to a charging control method, a device and a system of a lithium battery, which comprises the steps of firstly obtaining the continuous charging time of the lithium battery, determining the power-off voltage of the lithium battery according to the continuous charging time, reducing the power-off voltage of the lithium battery along with the prolonging of the continuous charging time, reducing the charging voltage according to the power-off voltage of the lithium battery, then collecting the current voltage of the lithium battery in real time, and powering off the lithium battery when the current voltage of the lithium battery reaches the power-off voltage; and when the current voltage of the lithium battery is lower than the charging voltage, recharging and charging the lithium battery. When the lithium battery is charged for a long time, the service life of the battery can be effectively prolonged by correspondingly reducing the power-off voltage and the charging voltage of the lithium battery.
Description
Technical Field
The invention relates to the technical field of intelligent control, in particular to a charging control method, device and system for a lithium battery.
Background
In the prior art, under the condition that electronic equipment is continuously charged through a charger, when a lithium battery in the electronic equipment reaches full-power voltage, frequent alternation of a charging state and a discharging state can be always carried out, the lithium battery is easy to generate bubbles, swell and even catch fire after a long time, and even if a protection plate is arranged around a battery core of the lithium battery, the situation can not be reduced.
Therefore, it is necessary to perform charge control of the lithium battery to extend the service life of the battery.
Disclosure of Invention
The present invention is directed to a method, an apparatus, and a system for controlling charging of a lithium battery, so as to solve one or more technical problems in the prior art and provide at least one useful choice or creation condition.
In order to achieve the purpose, the invention provides the following technical scheme:
a charging control method of a lithium battery includes:
acquiring the continuous charging time of a lithium battery, and determining the power-off voltage of the lithium battery according to the continuous charging time, wherein the power-off voltage of the lithium battery is reduced along with the prolonging of the continuous charging time;
reducing the charging voltage according to the power-off voltage of the lithium battery;
the method comprises the steps of collecting the current voltage of a lithium battery in real time, and powering off the lithium battery when the current voltage of the lithium battery reaches a power-off voltage; and when the current voltage of the lithium battery is lower than the charging voltage, recharging and charging the lithium battery.
As a further improvement of the above technical solution, the determining the power-off voltage of the lithium battery according to the continuous charging time includes:
acquiring a working voltage interval [ Umin, Umax ] of the lithium battery, wherein Umin represents the lowest working voltage value of the lithium battery, and Umax represents the full-electricity voltage value of the lithium battery;
acquiring a time threshold T, and judging whether the continuous charging time is lower than the time threshold T, wherein T is more than or equal to 1 hour and less than or equal to 24 hours;
when the continuous charging time is lower than a time threshold, the power-off voltage Ud of the lithium battery is equal to Umax;
and when the continuous charging time reaches a time threshold, the power-off voltage Ud of the lithium battery is k Umax, wherein k is more than or equal to 0.9 and less than or equal to 0.968.
As a further improvement of the above technical solution, the reducing the charging voltage according to the power-off voltage of the lithium battery includes:
obtaining the power-off voltage Ud of the lithium battery, and calculating the charging voltage of the lithium battery according to a formula Uc-m-Ud, wherein m is more than or equal to 0.97 and less than or equal to 0.98.
A charge control device of a lithium battery, comprising:
the power-off voltage determining module is used for acquiring the continuous charging time of the lithium battery and determining the power-off voltage of the lithium battery according to the continuous charging time, and the power-off voltage of the lithium battery is reduced along with the prolonging of the continuous charging time;
the charging voltage reduction module is used for reducing the charging voltage according to the power-off voltage of the lithium battery;
the lithium battery power-off module is used for acquiring the current voltage of the lithium battery in real time, outputting a low level to the enable switch when the current voltage of the lithium battery reaches the power-off voltage, and triggering the charging circuit to cut off the charging so as to cut off the power of the lithium battery;
and the lithium battery recharging and charging module is used for outputting a high level to the enabling switch when the current voltage of the lithium battery is lower than the charging voltage, and triggering the charging circuit to be connected for charging so as to enable the lithium battery to recharge and charge.
As a further improvement of the above technical solution, the power-off voltage determination module is specifically configured to:
acquiring a working voltage interval [ Umin, Umax ] of the lithium battery, wherein Umin represents the lowest working voltage value of the lithium battery, and Umax represents the full-electricity voltage value of the lithium battery;
acquiring a time threshold T, and judging whether the continuous charging time is lower than the time threshold T, wherein T is more than or equal to 1 hour and less than or equal to 24 hours;
when the continuous charging time is lower than a time threshold, the power-off voltage Ud of the lithium battery is equal to Umax;
and when the continuous charging time reaches a time threshold, the power-off voltage Ud of the lithium battery is k Umax, wherein k is more than or equal to 0.9 and less than or equal to 0.968.
As a further improvement of the above technical solution, the charging voltage reduction module is specifically configured to:
obtaining the power-off voltage Ud of the lithium battery, and calculating the charging voltage of the lithium battery according to a formula Uc-m-Ud, wherein m is more than or equal to 0.97 and less than or equal to 0.98.
A charge control system for a lithium battery, comprising: the single chip microcomputer, the enabling switch and the charging circuit are connected in sequence; the singlechip includes: a memory, a processor and a computer program stored in the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method as claimed in any one of the above.
The invention has the beneficial effects that: the invention provides a charging control method, a device and a system of a lithium battery, which comprises the steps of firstly obtaining the continuous charging time of the lithium battery, determining the power-off voltage of the lithium battery according to the continuous charging time, reducing the power-off voltage of the lithium battery along with the extension of the continuous charging time, reducing the charging voltage according to the power-off voltage of the lithium battery, then collecting the current voltage of the lithium battery in real time, and powering off the lithium battery when the current voltage of the lithium battery reaches the power-off voltage; and when the current voltage of the lithium battery is lower than the charging voltage, recharging and charging the lithium battery. When the lithium battery is charged for a long time, the service life of the battery can be effectively prolonged by correspondingly reducing the power-off voltage and the charging voltage of the lithium battery.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic flow chart of a charging control method for a lithium battery according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a charging control device for a lithium battery according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a charging control system for a lithium battery according to an embodiment of the present invention.
Detailed Description
The conception, the specific structure and the technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the schemes and the effects of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Referring to fig. 1, as shown in fig. 1, a method for controlling charging of a lithium battery according to an embodiment of the present invention includes the following steps:
s100, acquiring the continuous charging time of the lithium battery, and determining the power-off voltage of the lithium battery according to the continuous charging time, wherein the power-off voltage of the lithium battery is reduced along with the prolonging of the continuous charging time;
s200, reducing charging voltage according to the power-off voltage of the lithium battery;
s300, collecting the current voltage of the lithium battery in real time, and powering off the lithium battery when the current voltage of the lithium battery reaches a power-off voltage; and when the current voltage of the lithium battery is lower than the charging voltage, recharging and charging the lithium battery.
In the embodiment provided by the invention, the power-off voltage is associated with the continuous charging time of the lithium battery, and when the lithium battery is charged for a long time, the power-off voltage and the charging voltage are correspondingly reduced, so that the electric quantity load of the lithium battery can be effectively reduced, the problems of bubbles, bulges and the like caused by the long-term operation of the lithium battery under the full-power voltage are prevented, and the service life of the battery is prolonged.
As a further improvement of the above technical solution, in the step S100, determining the power-off voltage of the lithium battery according to the continuous charging time includes:
acquiring a working voltage interval [ Umin, Umax ] of the lithium battery, wherein Umin represents the lowest working voltage value of the lithium battery, and Umax represents the full-electricity voltage value of the lithium battery;
acquiring a time threshold T, and judging whether the continuous charging time is lower than the time threshold T, wherein T is more than or equal to 1 hour and less than or equal to 24 hours;
when the continuous charging time is lower than a time threshold, the power-off voltage Ud of the lithium battery is equal to Umax;
and when the continuous charging time reaches a time threshold, the power-off voltage Ud of the lithium battery is k Umax, wherein k is more than or equal to 0.9 and less than or equal to 0.968.
In the embodiment, the time threshold can be set according to the actual service condition of the lithium battery, the power-off voltage of the lithium battery is the full-power voltage within the time threshold, the service life of the lithium battery cannot be influenced due to limited duration, and when the time threshold is exceeded, the lithium battery is protected by adopting the method disclosed by the invention, so that the lithium battery can be reasonably charged and protected.
As a further improvement of the above technical solution, in the step S200, reducing the charging voltage according to the power-off voltage of the lithium battery includes:
obtaining the power-off voltage Ud of the lithium battery, and calculating the charging voltage of the lithium battery according to a formula Uc-m-Ud, wherein m is more than or equal to 0.97 and less than or equal to 0.98.
In this embodiment, charging voltage should rationally set up, and too low charging voltage can influence the power supply output of lithium cell, and too high charging voltage can lead to the frequent switching of charged state and discharge state, adopts the charging voltage calculation mode that this embodiment provided, sets up lithium cell charged state and discharge state's switching frequency in reasonable within range, under the prerequisite of can lithium cell normal use, effectively prolongs the life of lithium cell.
Referring to fig. 2, an embodiment of the present invention further provides a charging control apparatus for a lithium battery, including:
the power-off voltage determining module is used for acquiring the continuous charging time of the lithium battery and determining the power-off voltage of the lithium battery according to the continuous charging time, and the power-off voltage of the lithium battery is reduced along with the prolonging of the continuous charging time;
the charging voltage reduction module is used for reducing the charging voltage according to the power-off voltage of the lithium battery;
the lithium battery power-off module is used for acquiring the current voltage of the lithium battery in real time, outputting a low level to the enable switch when the current voltage of the lithium battery reaches the power-off voltage, and triggering the charging circuit to cut off the charging so as to cut off the power of the lithium battery;
and the lithium battery recharging and charging module is used for outputting a high level to the enabling switch when the current voltage of the lithium battery is lower than the charging voltage, and triggering the charging circuit to be connected for charging so as to enable the lithium battery to recharge and charge.
As a further improvement of the above technical solution, the power-off voltage determination module is specifically configured to:
acquiring a working voltage interval [ Umin, Umax ] of the lithium battery, wherein Umin represents the lowest working voltage value of the lithium battery, and Umax represents the full-electricity voltage value of the lithium battery;
acquiring a time threshold T, and judging whether the continuous charging time is lower than the time threshold T, wherein T is more than or equal to 1 hour and less than or equal to 24 hours;
when the continuous charging time is lower than a time threshold, the power-off voltage Ud of the lithium battery is equal to Umax;
and when the continuous charging time reaches a time threshold, the power-off voltage Ud of the lithium battery is k Umax, wherein k is more than or equal to 0.9 and less than or equal to 0.968.
As a further improvement of the above technical solution, the charging voltage reduction module is specifically configured to:
obtaining the power-off voltage Ud of the lithium battery, and calculating the charging voltage of the lithium battery according to a formula Uc-m-Ud, wherein m is more than or equal to 0.97 and less than or equal to 0.98.
The present invention provides a specific embodiment as follows:
as shown in figure 2, in order to reduce the frequency switching from 'full charge' to 'battery protection stop charging' and then to 'recharging after machine power consumption', the invention provides an enabling switch which is connected with a singlechip through a pin.
The normal voltage range of the lithium battery is 3.0V to 4.2V, namely the full-electricity voltage value of the lithium battery is 4.2V, and the time threshold T is set to be 8 hours.
When the charging time is within 8 hours, the set power-off voltage is 4.2V, when the lithium battery voltage is 4.2V, the low level is output to the enabling switch, the charging circuit is triggered to be disconnected for charging, when the lithium battery voltage is lower than 4.1V, the high level is output to the enabling switch through the single chip microcomputer, the charging circuit is triggered to be connected for charging, and therefore the lithium battery is enabled to be recharged for charging.
In order to prevent the lithium battery from being in a full-charge state for a long time, when the charging time is more than 8 hours, the power-off voltage is set to be 4.05V, when the voltage of the lithium battery is 4.05V, the single chip microcomputer outputs a low level to the enable switch to trigger the charging circuit to cut off charging, and when the voltage of the battery is lower than 3.95V, the single chip microcomputer outputs a high level to the enable switch to trigger the charging circuit to cut on charging.
Compared with the prior art, the beneficial effects of the charging control device for the lithium battery provided in the embodiment of the present invention are the same as the beneficial effects of the charging control method for the lithium battery provided in the embodiment, and details are not repeated herein.
Referring to fig. 3, an embodiment of the present invention further provides a charging control system for a lithium battery, including: the single chip microcomputer, the enabling switch and the charging circuit are connected in sequence; the singlechip includes: a memory, a processor and a computer program stored in the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method as claimed in any one of the above.
Compared with the prior art, the beneficial effects of the charging control system for the lithium battery provided in the embodiment of the present invention are the same as the beneficial effects of the charging control method for the lithium battery provided in the embodiment, and details are not repeated herein.
Through the above description of the embodiments, it is clear to those skilled in the art that the method of the embodiments described above can be implemented by software plus a necessary general hardware platform, and based on such understanding, the technical solution of the present invention or portions contributing to the prior art can be embodied in the form of a software product, which is stored in the above-mentioned single chip microcomputer to execute the method described in the embodiments of the present invention.
While the present invention has been described in considerable detail and with particular reference to a few illustrative embodiments thereof, it is not intended to be limited to any such details or embodiments or any particular embodiments, but rather it is to be construed that the invention effectively covers the intended scope of the invention by virtue of the prior art providing a broad interpretation of such claims in view of the appended claims. Furthermore, the foregoing describes the invention in terms of embodiments foreseen by the inventor for which an enabling description was available, notwithstanding that insubstantial modifications of the invention, not presently foreseen, may nonetheless represent equivalent modifications thereto.
Claims (7)
1. A charging control method for a lithium battery is characterized by comprising the following steps:
acquiring the continuous charging time of a lithium battery, and determining the power-off voltage of the lithium battery according to the continuous charging time, wherein the power-off voltage of the lithium battery is reduced along with the prolonging of the continuous charging time;
reducing the charging voltage according to the power-off voltage of the lithium battery;
the method comprises the steps of collecting the current voltage of a lithium battery in real time, and powering off the lithium battery when the current voltage of the lithium battery reaches a power-off voltage; and when the current voltage of the lithium battery is lower than the charging voltage, recharging and charging the lithium battery.
2. The method as claimed in claim 1, wherein the determining the off-voltage of the lithium battery according to the continuous charging time comprises:
acquiring a working voltage interval [ Umin, Umax ] of the lithium battery, wherein Umin represents the lowest working voltage value of the lithium battery, and Umax represents the full-electricity voltage value of the lithium battery;
acquiring a time threshold T, and judging whether the continuous charging time is lower than the time threshold T, wherein T is more than or equal to 1 hour and less than or equal to 24 hours;
when the continuous charging time is lower than a time threshold, the power-off voltage Ud of the lithium battery is equal to Umax;
and when the continuous charging time reaches a time threshold, the power-off voltage Ud of the lithium battery is k Umax, wherein k is more than or equal to 0.9 and less than or equal to 0.968.
3. The method of claim 2, wherein the reducing the charging voltage according to the off-voltage of the lithium battery comprises:
obtaining the power-off voltage Ud of the lithium battery, and calculating the charging voltage of the lithium battery according to a formula Uc-m-Ud, wherein m is more than or equal to 0.97 and less than or equal to 0.98.
4. A charge control device for a lithium battery, comprising:
the power-off voltage determining module is used for acquiring the continuous charging time of the lithium battery and determining the power-off voltage of the lithium battery according to the continuous charging time, and the power-off voltage of the lithium battery is reduced along with the prolonging of the continuous charging time;
the charging voltage reduction module is used for reducing the charging voltage according to the power-off voltage of the lithium battery;
the lithium battery power-off module is used for acquiring the current voltage of the lithium battery in real time, outputting a low level to the enable switch when the current voltage of the lithium battery reaches the power-off voltage, and triggering the charging circuit to cut off the charging so as to cut off the power of the lithium battery;
and the lithium battery recharging and charging module is used for outputting a high level to the enabling switch when the current voltage of the lithium battery is lower than the charging voltage, and triggering the charging circuit to be connected for charging so as to enable the lithium battery to recharge and charge.
5. The charging control device of a lithium battery as claimed in claim 4, wherein the power-off voltage determination module is specifically configured to:
acquiring a working voltage interval [ Umin, Umax ] of the lithium battery, wherein Umin represents the lowest working voltage value of the lithium battery, and Umax represents the full-electricity voltage value of the lithium battery;
acquiring a time threshold T, and judging whether the continuous charging time is lower than the time threshold T, wherein T is more than or equal to 1 hour and less than or equal to 24 hours;
when the continuous charging time is lower than a time threshold, the power-off voltage Ud of the lithium battery is equal to Umax;
and when the continuous charging time reaches a time threshold, the power-off voltage Ud of the lithium battery is k Umax, wherein k is more than or equal to 0.9 and less than or equal to 0.968.
6. The charging control device of a lithium battery as claimed in claim 5, wherein the charging voltage reduction module is specifically configured to:
obtaining the power-off voltage Ud of the lithium battery, and calculating the charging voltage of the lithium battery according to a formula Uc-m-Ud, wherein m is more than or equal to 0.97 and less than or equal to 0.98.
7. A charge control system for a lithium battery, comprising: the single chip microcomputer, the enabling switch and the charging circuit are connected in sequence; the singlechip includes: memory, a processor and a computer program stored in the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to any one of claims 1 to 3.
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| CN202010392386.0A CN111682599A (en) | 2020-05-11 | 2020-05-11 | Charging control method, device and system for lithium battery |
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| CN202010392386.0A CN111682599A (en) | 2020-05-11 | 2020-05-11 | Charging control method, device and system for lithium battery |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730915A (en) * | 2012-10-10 | 2014-04-16 | 国基电子（上海）有限公司 | Charging control method and electronic equipment adopting method |
| JP2015023645A (en) * | 2013-07-18 | 2015-02-02 | 東芝三菱電機産業システム株式会社 | Uninterruptible power supply |
| CN204167962U (en) * | 2014-11-08 | 2015-02-18 | 吴江德雷克斯电子有限公司 | A kind of vehicle-mounted mobile power supply with change-over circuit |
| CN109038697A (en) * | 2017-06-09 | 2018-12-18 | 北京小米移动软件有限公司 | Charge control method and battery charge controller, electronic equipment |
| CN109888853A (en) * | 2018-10-31 | 2019-06-14 | 中移物联网有限公司 | A kind of charge control method, terminal device and storage medium |
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2020
- 2020-05-11 CN CN202010392386.0A patent/CN111682599A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730915A (en) * | 2012-10-10 | 2014-04-16 | 国基电子（上海）有限公司 | Charging control method and electronic equipment adopting method |
| JP2015023645A (en) * | 2013-07-18 | 2015-02-02 | 東芝三菱電機産業システム株式会社 | Uninterruptible power supply |
| CN204167962U (en) * | 2014-11-08 | 2015-02-18 | 吴江德雷克斯电子有限公司 | A kind of vehicle-mounted mobile power supply with change-over circuit |
| CN109038697A (en) * | 2017-06-09 | 2018-12-18 | 北京小米移动软件有限公司 | Charge control method and battery charge controller, electronic equipment |
| CN109888853A (en) * | 2018-10-31 | 2019-06-14 | 中移物联网有限公司 | A kind of charge control method, terminal device and storage medium |
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Application publication date: 20200918 |