CN104319841A - Lithium battery charging management device - Google Patents

Lithium battery charging management device Download PDF

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Publication number
CN104319841A
CN104319841A CN201410589769.1A CN201410589769A CN104319841A CN 104319841 A CN104319841 A CN 104319841A CN 201410589769 A CN201410589769 A CN 201410589769A CN 104319841 A CN104319841 A CN 104319841A
Authority
CN
China
Prior art keywords
charging
lithium battery
voltage
controller
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410589769.1A
Other languages
Chinese (zh)
Inventor
卫亚东
田学红
李仕胜
李仕炽
张海霞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BEIJING HONGZHIDIANTONG TECHNOLOGY Co Ltd
Original Assignee
BEIJING HONGZHIDIANTONG TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to CN201410323865 priority Critical
Priority to CN201410323865.1 priority
Application filed by BEIJING HONGZHIDIANTONG TECHNOLOGY Co Ltd filed Critical BEIJING HONGZHIDIANTONG TECHNOLOGY Co Ltd
Priority to CN201410589769.1A priority patent/CN104319841A/en
Publication of CN104319841A publication Critical patent/CN104319841A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00038Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange using passive battery identification means, e.g. resistors or capacitors
    • H02J7/00041Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange using passive battery identification means, e.g. resistors or capacitors in response to measured battery parameters, e.g. voltage, current or temperature profile
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/0044Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction specially adapted for holding portable devices containing batteries
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007Regulation of charging or discharging current or voltage
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/10Control circuit supply, e.g. means for supplying power to the control circuit
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention provides a lithium battery charging management device which comprises a micro-control unit, a voltage controller, a charging current controller and a temperature detector. The voltage controller, the charging current controller and the temperature detector are connected with the micro-control unit. By means of the lithium battery charging management device, the charging current and the charging voltage can be adjusted dynamically in the charging process, safety in the whole charging process is guaranteed, the charging time is shortened as much as possible, the charging efficiency is improved, and the risks caused by insufficient response speed of an MCU or halt of the MCU can be avoided.

Description

Lithium cell charging management devices
Technical field
The present invention relates to a kind of lithium cell charging management devices.
Background technology
Lithium battery has been widely used in the fields such as mobile phone, computer, portable equipment, automobile, but the potential safety hazard that lithium battery self exists, lithium battery can be caused to burn, explode; Bring great damage to person and financial losses.Therefore, in the application of lithium battery, the safety management for lithium battery is a crucial problem.For the safety management of lithium battery, emphasis is preventing extruding/high temperature, has had many schemes to provide protection for the safe handling of lithium battery.
In prior art, in order to safety management is to the charging of lithium battery, a kind of power outage security of over-charge of lithium battery with soft shell can be adopted.This power outage security comprises lithium battery with soft shell and breaker device, lithium battery with soft shell has positive pole electricity handle and negative electricity handle, and be coated with soft housing in its outside, breaker device comprise amplexiform in the surface of shell of described lithium battery with soft shell plate and to be connected to above plate and to correspond to the separating mechanism of the arbitrary electric handle in described electric handle, wherein lithium battery with soft shell overcharged after military order housing produce expand, and plate is moved to side outside lithium battery with soft shell, and with separating mechanism, separation power-off is carried out to electric handle.So, not only can simplify overall structure and significantly reduce costs, and can effectively prevent lithium battery with soft shell from exploding and the extensive damage that derives.But this technical scheme uses the charging of method to lithium battery of machinery to protect, the characteristic of the cell expansion caused by overshoot stops charging.Because cell expansion is slowly, so the program can face very large integrity problem in the application.
A kind of lithium battery charging management circuit can also be adopted to carry out the charging of safety management to lithium battery.This charge management circuit is by charging inlet connecting charger, and be all connected with each battery battery core the two poles of the earth of composition lithium battery bag, this circuit comprises: front-end collection unit, for gathering battery each battery core voltage, temperature parameter be transferred to following MCU (micro-control unit); MCU, realizes Systematical control and Charge Management; Charging control unit, is connected with above-mentioned MCU, is controlled by the pwm signal control external charger work that MCU sends.Described charge management circuit takes single-unit battery core Voltage Feedback mode, effectively prevent only with lithium battery bag the two poles of the earth Pack+, Pack-voltage for carrying out the drawback of Charge Management during reference; When certain economize on electricity core voltage reaches amplitude limit value in charging process, namely MCU adjusts instruction reduction charging current and avoids cell voltage to transfinite, and ensure that the safety of lithium battery, improves charge efficiency simultaneously.But, this technical scheme due to its whole Charge Management be controlled by MCU, the speed of control response is slow.Mainly rely on MCU in addition to control, software occurs abnormal, whole charging may be caused out of control, bring potential safety hazard.
Summary of the invention
For the above-mentioned problems in the prior art, the invention provides a kind of lithium cell charging management devices, the charging of lithium battery can be managed safely and reliably.
A kind of lithium cell charging management devices, wherein, this device comprises: micro-control unit, voltage controller, charging current controller and Temperature Detector, and described voltage controller, charging current controller are connected respectively at described microcontroller with Temperature Detector,
Described voltage controller, for controlling the charging voltage of lithium battery, makes charging voltage be less than charging voltage threshold value;
Described charging current controller, for controlling the charging current of lithium battery, makes charging current be less than charging current threshold value;
The temperature of the lithium battery detected for detecting the temperature of lithium battery, and is transferred to described microcontroller by described Temperature Detector;
Described microcontroller is for controlling the start and stop of charging, charging voltage threshold value and the charging current threshold value of lithium battery are set according to the temperature of the lithium battery received from Temperature Detector, and by charging voltage threshold packet transmission to described voltage controller, and by charging current threshold packet transmission to described current controller.
Utilize lithium cell charging management devices of the present invention, charging current and charging voltage can be dynamically adjusted in charging process, ensure that the safety of whole charging process, charging interval is shortened as far as possible, improve charge efficiency, and can avoid the response speed of MCU not or MCU to crash the risk caused.
In a preferred embodiment, lithium cell charging management devices according to the present invention also comprises discharging current controller, thus in discharge process, dynamically can adjust discharging current, guarantees the safety of discharge process, and improves discharging efficiency.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the structured flowchart according to lithium cell charging management devices of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Fig. 1 shows the structured flowchart according to lithium cell charging management devices of the present invention.With reference to figure 1, the invention provides a kind of lithium cell charging management devices, wherein, this device comprises: micro-control unit, voltage controller, charging current controller and Temperature Detector, described voltage controller, charging current controller are connected respectively at described microcontroller with Temperature Detector, described voltage controller, for controlling the charging voltage of lithium battery, makes charging voltage be less than charging voltage threshold value; Described charging current controller, for controlling the charging current of lithium battery, makes charging current be less than charging current threshold value; The temperature of the lithium battery detected for detecting the temperature of lithium battery, and is transferred to described microcontroller by described Temperature Detector; Described microcontroller is for controlling the start and stop of charging, charging voltage threshold value and the charging current threshold value of lithium battery are set according to the temperature of the lithium battery received from Temperature Detector, and by charging voltage threshold packet transmission to described voltage controller, and by charging current threshold packet transmission to described current controller.
Wherein, MCU carries out the setting of parameter, comprises the charging voltage threshold value and charging current threshold value that arrange lithium battery; MCU charging voltage threshold value configure to voltage control its, utilize voltage controller, control charging voltage, make charging voltage be no more than charging voltage threshold value; MCU also configures charging current threshold value to charging current controller, utilizes charging current controller, controls charging current, makes charging current be no more than charging current threshold value; Utilize a current controller, carry out output current management and control; Utilize hygrosensor, detect the temperature of lithium battery in time, and in time to MCU feedback, when the temperature of lithium battery exceedes dangerous temperature, micro-control unit can make charging stop, thus cuts off the work of whole battery.
Preferably, described microcontroller, when judging that the temperature of described lithium battery exceedes warning temperature (such as, 55 degrees Celsius), reduces described charging voltage threshold value and described charging current threshold value.Like this, charging current controller and voltage controller can control charging current and the charging voltage of battery, and charging current and charging voltage are reduced.
Preferred further, described microcontroller, when judging the temperature of described lithium battery lower than safe temperature (such as, 40 degrees Celsius), improves described charging voltage threshold value and described charging current threshold value.Like this, charging current controller and voltage controller can control charging current and the charging voltage of battery, and charging current and charging voltage are improved.
Utilize preferred embodiment above-mentioned, by Real-Time Monitoring battery temperature, charging voltage and charging current can be controlled via voltage controller and charging current controller, can provide flexible and reliable Charge Management on the one hand, on the other hand, MCU is only responsible for parameters and overall control, and concrete operating process is owing to controlling by hardware, can prevent the response speed of software not and MCU to occur crashing the danger of the such as overshoot or short circuit that cause.
Preferably, described microcontroller is also for obtaining the voltage of battery, and the charge mode of voltage determination lithium battery according to battery.The charge mode of described lithium battery can comprise at least one in trickle charge pattern, constant current charging mode and constant voltage charge pattern.Wherein, trickle charge pattern is the pattern of the lithium battery discharged completely being carried out to restorative charging, i.e. preliminary filling, and constant current charging mode is the pattern with constant current charge, and constant voltage charge pattern is the pattern with constant-potential charge.General, select trickle charge pattern in lithium battery voltage lower than during 3V, under this trickle charge pattern, charging current threshold value can be such as 0.1C or 256mA; When cell voltage rises to after more than trickle charge threshold value, start to enter constant current charging mode, constant current charge electric current is between 0.2C ~ 1.5C, and this portable power source is maximum can accomplish 4.5A, is equivalent to the 0.85C of 5300mAh battery; And when cell voltage rises to 4.2V, constant voltage charge pattern can be selected, under constant voltage charge pattern, battery both end voltage is constant, and the electric current flowing through battery progressively reduces, and when electric current is reduced to setting threshold, constant voltage charge terminates; In this programme, current threshold is 128mA.
In order to security control can also be carried out to the discharge process of lithium battery, preferably, this device can also comprise discharging current controller, and described discharging current controller is connected with described micro-control unit, for controlling the discharging current of lithium battery, discharging current is made to be less than discharging current threshold; Discharging current threshold also for arranging the discharging current threshold of lithium battery according to the temperature of the lithium battery received from Temperature Detector, and is transferred to described current controller by described microcontroller.
Preferably, MCU arranges the discharging current threshold of lithium battery, the temperature of the lithium battery got as MCU exceedes warning temperature (such as, 55 degrees Celsius) time, reduce described discharging current threshold, like this, discharging current controller can control the discharging current of battery, and discharging current is reduced.
Preferred further, described microcontroller, when judging the temperature of described lithium battery lower than safe temperature (such as, 40 degrees Celsius), improves described discharging current threshold.Like this, discharging current controller can control the discharging current of battery, and discharging current is improved.
By preferred embodiment above-mentioned, according to the discharging current of the temperature automatic control battery of battery, the safety of battery discharge procedure can also be ensured.
Utilize lithium cell charging management devices provided by the invention, consider the various factors of the safety affecting charging and discharging lithium battery, by MCU, charging current threshold value, discharging current threshold and charging voltage threshold value etc. are set, and electric current and the voltage of battery is directly controlled by hardware, the charging and discharging of battery can be controlled safely and effectively, realize precision management to battery charge and discharge process, meanwhile, can avoid the response speed of MCU not or MCU to crash the various risks caused.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned execution mode; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different execution mode of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.

Claims (6)

1. a lithium cell charging management devices, wherein, this device comprises: micro-control unit, voltage controller, charging current controller and Temperature Detector, and described voltage controller, charging current controller are connected respectively at described microcontroller with Temperature Detector,
Described voltage controller, for controlling the charging voltage of lithium battery, makes charging voltage be less than charging voltage threshold value;
Described charging current controller, for controlling the charging current of lithium battery, makes charging current be less than charging current threshold value;
The temperature of the lithium battery detected for detecting the temperature of lithium battery, and is transferred to described microcontroller by described Temperature Detector;
Described microcontroller is for controlling the start and stop of charging, charging voltage threshold value and the charging current threshold value of lithium battery are set according to the temperature of the lithium battery received from Temperature Detector, and by charging voltage threshold packet transmission to described voltage controller, and by charging current threshold packet transmission to described current controller.
2. lithium cell charging management devices according to claim 1, wherein, described microcontroller, when judging that the temperature of described lithium battery exceedes warning temperature, reduces described charging voltage threshold value and described charging current threshold value.
3. lithium cell charging management devices according to claim 1, wherein, described microcontroller is also for obtaining the voltage of battery, and the charge mode of voltage determination lithium battery according to battery.
4. lithium cell charging management devices according to claim 2, wherein, the charge mode of described lithium battery comprises at least one in trickle charge pattern, constant current charging mode, constant voltage charge pattern and pulse current charge pattern.
5. lithium cell charging management devices according to claim 1, wherein, this device also comprises: discharging current controller, and described discharging current controller is connected with described microcontroller,
Described discharging current controller, for controlling the discharging current of lithium battery, makes discharging current be less than discharging current threshold;
Discharging current threshold also for arranging the discharging current threshold of lithium battery according to the temperature of the lithium battery received from Temperature Detector, and is transferred to described current controller by described microcontroller.
6. lithium cell charging management devices according to claim 5, wherein, described microcontroller, when judging that the temperature of described lithium battery exceedes warning temperature, reduces described discharging current threshold.
CN201410589769.1A 2014-07-08 2014-10-28 Lithium battery charging management device Pending CN104319841A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201410323865 2014-07-08
CN201410323865.1 2014-07-08
CN201410589769.1A CN104319841A (en) 2014-07-08 2014-10-28 Lithium battery charging management device

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Application Number Priority Date Filing Date Title
CN201410589769.1A CN104319841A (en) 2014-07-08 2014-10-28 Lithium battery charging management device

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105471050A (en) * 2016-01-13 2016-04-06 惠州市美亚飞电器有限公司 Intelligent protection management method for lithium battery
CN105490334A (en) * 2015-12-18 2016-04-13 上海优思通信科技有限公司 Charging system and method for portable electronic devices
CN105932740A (en) * 2016-06-01 2016-09-07 惠州市蓝微新源技术有限公司 Self-adaptive charging method and charging device for electric automobile power battery
CN106374586A (en) * 2016-11-20 2017-02-01 鹰星精密工业(深圳)有限公司 Charger for battery packs
CN106816915A (en) * 2015-11-30 2017-06-09 现代自动车株式会社 For the control method and system that are charged for vehicle high-voltage battery
CN107167736A (en) * 2016-03-07 2017-09-15 丰田自动车株式会社 The voltage determination method of battery
CN111049228A (en) * 2019-12-31 2020-04-21 杰之深(苏州)科技有限公司 Integrated lithium battery charging and discharging management system of handheld dust collector

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US20050253561A1 (en) * 2004-05-11 2005-11-17 Tibbs Bobby L Temperature sensitive charging of batteries with simple chargers
CN101118979A (en) * 2006-08-04 2008-02-06 诺基亚公司 Method and device for charging a battery at elevated temperatures
CN103904746A (en) * 2014-04-04 2014-07-02 西北工业大学 Intelligent quick charger of positive and negative pulse power battery and charging method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050253561A1 (en) * 2004-05-11 2005-11-17 Tibbs Bobby L Temperature sensitive charging of batteries with simple chargers
CN101118979A (en) * 2006-08-04 2008-02-06 诺基亚公司 Method and device for charging a battery at elevated temperatures
CN103904746A (en) * 2014-04-04 2014-07-02 西北工业大学 Intelligent quick charger of positive and negative pulse power battery and charging method thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106816915A (en) * 2015-11-30 2017-06-09 现代自动车株式会社 For the control method and system that are charged for vehicle high-voltage battery
CN105490334A (en) * 2015-12-18 2016-04-13 上海优思通信科技有限公司 Charging system and method for portable electronic devices
CN105471050A (en) * 2016-01-13 2016-04-06 惠州市美亚飞电器有限公司 Intelligent protection management method for lithium battery
CN105471050B (en) * 2016-01-13 2018-06-26 惠州市美亚飞电器有限公司 A kind of lithium battery intelligent conservative management method
CN107167736A (en) * 2016-03-07 2017-09-15 丰田自动车株式会社 The voltage determination method of battery
CN105932740A (en) * 2016-06-01 2016-09-07 惠州市蓝微新源技术有限公司 Self-adaptive charging method and charging device for electric automobile power battery
CN105932740B (en) * 2016-06-01 2018-11-30 惠州市蓝微新源技术有限公司 The adaptive charging method and charging unit of electric automobile power battery
CN106374586A (en) * 2016-11-20 2017-02-01 鹰星精密工业(深圳)有限公司 Charger for battery packs
CN106374586B (en) * 2016-11-20 2018-06-22 鹰星精密工业(深圳)有限公司 A kind of charger available for battery pack
CN111049228A (en) * 2019-12-31 2020-04-21 杰之深(苏州)科技有限公司 Integrated lithium battery charging and discharging management system of handheld dust collector

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