CN102148410B - Method for charging battery - Google Patents
Method for charging battery Download PDFInfo
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- CN102148410B CN102148410B CN201010111742.3A CN201010111742A CN102148410B CN 102148410 B CN102148410 B CN 102148410B CN 201010111742 A CN201010111742 A CN 201010111742A CN 102148410 B CN102148410 B CN 102148410B
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- 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention provides a method for charging a battery. The method is used for prolonging the service life of the battery; the method for charging the battery is mainly as follows: proper charge cut-off voltage is adjusted along with variation of at least one of residual capacity, idle time and the like of the battery, furthermore, the charge cut-off voltage is not a fixed value and can change along with the current state of the battery, thereby increasing the charging efficiency of the battery; in addition, the invention additionally provides a charging method which can adjust proper charge cut-off current along with the variation of actual capacity of the battery. The circuit is low in implementation cost, only the charging law of software needs to be changed, the service life of the battery can be prolonged, and the charging method is safer.
Description
Technical field
The present invention relates to a kind of method for charging batteries, user's use habit is recorded in espespecially a kind of meeting, so that the charge cutoff voltage of battery is done and repaiied or lower, so as to the method for charging batteries of extending battery life.
Background technology
Lithium battery is because of the restriction of material characteristic, and its charging voltage generally must not surpass 4.2V/ battery, otherwise will greatly reduce useful life, meanwhile, too many if charging voltage surpasses, and lithium battery has the danger existence of burning or blast.
With reference to figure 1, it is traditional lithium cell charging curve synoptic diagram.The charging modes of lithium battery carries out constant-current charge at first, as curve I, afterwards, carries out constant-voltage charge and is full of electricity, as curve V.Initial constant-current charge, till proceeding to the charge cutoff voltage Voff that cell voltage rises to setting.When cell voltage rises to charge cutoff voltage Voff, switch to constant-voltage charge, to avoid cell voltage to continue to rise.Now, charging current, under constant-voltage charge, reduces gradually, when battery current drops to a charging cut-off current Ioff of setting, represents that battery is for being full of electricity condition.
In traditional charging method, there is a kind of pulse charge method that utilizes the open and close of cutoff switch modulation charging current, with to lithium cell charging.But, this kind of method usually can be not good because of controlling, and cause the infringement in lithium battery life-span.In addition, the switching of cutoff switch also can cause damage, and in the process of switching at cutoff switch, has been easy to surging high voltage and has damage lithium battery, and then shortens the life-span of lithium battery.
In traditional charging method, separately there is a kind of utilization to discharge and recharge the charging method that number of times is repaiied charge cutoff voltage under coming.But if user is under incomplete situation using the situation of battery, namely battery is not discharged and just charges or do not have full charging just under the situation of electric discharge, again or always under the state in charging (being connected in the state of power adapter).Under afore-mentioned, by causing this kind of utilization to discharge and recharge number of times, repair the charging method of charge cutoff voltage under coming and cannot revise smoothly charge cutoff voltage.
Therefore, in the control of traditional lithium cell charging, major part is to do for lithium battery state instantly the modulation charging, and does not have according to user's use habit and the charging modes of relative changes charge cutoff voltage.
Summary of the invention
The invention provides a kind of method for charging batteries, in order to promote battery life.Method for charging batteries of the present invention is mainly to adjust suitable charge cutoff voltage along with the change at least wherein such as battery remaining power and standby time, and, charge cutoff voltage is not fixed value, its meeting is along with the current state of battery changes to some extent, and then the efficiency for charge-discharge of increase battery.In addition, the method for charging batteries of embodiments of the invention except along with the change at least wherein such as battery remaining power and standby time, adjust suitable charge cutoff voltage, more comprise the charging method of adjusting suitable charging cut-off current along with the actual capacity change of battery.
The method for charging batteries of embodiments of the invention offers a control circuit and carries out, by to determine a charging cut-off current, and then according to this charging cut-off current, one battery is charged, the method comprises: utilize this control circuit to read a battery actual capacity parameter, this battery actual capacity parameter represents the percentage after a battery actual capacity or this battery actual capacity are divided by a battery design capacity; Utilize this control circuit to read a preset rules, it is interval that this preset rules defines a plurality of battery capacities, and those battery capacity intervals comprise one first battery capacity interval and one second battery capacity interval; Utilize this control circuit to judge whether this battery actual capacity parameter falls within this first or second battery capacity interval; When this control circuit judges that this battery actual capacity parameter falls within this first battery capacity interval, according to one first charging cut-off current, this battery is charged; And when this control circuit judges that this battery actual capacity parameter falls within this second battery capacity interval, according to one second charging cut-off current, this battery is charged; Wherein this first and second battery capacity is interval different, and this first charging cut-off current is less than this second charging cut-off current.
The method for charging batteries of embodiments of the invention offers a control circuit and carries out, by to determine a charge cutoff voltage, and then according to this charge cutoff voltage, one battery is charged, the method comprises: utilize this control circuit to record an actual standby time of this battery; Utilize this control circuit to read a preset rules, this preset rules defines between a plurality of battery lay-up periods, comprises between one first battery lay-up period and between one second battery lay-up period between those battery lay-up periods; Utilize this control circuit to judge and whether fall within this actual standby time between this first or second battery lay-up period; When this control circuit judges while falling within this actual standby time between this first battery lay-up period, according to one first charge cutoff voltage to this battery charging; And when this control circuit judges that this battery actual capacity falls between this second battery lay-up period, according to one second charge cutoff voltage, this battery is charged; Wherein different between this first and second lay-up period, and this first charge cutoff voltage is greater than this second charge cutoff voltage.
The method for charging batteries of embodiments of the invention, offering a control circuit carries out, by to determine a charge cutoff voltage, and then according to this charge cutoff voltage, one battery is charged, the method comprises: utilize this control circuit to read a battery remaining power parameter, this battery remaining power parameter represents the percentage after a battery remaining power or this battery remaining power are divided by a battery actual capacity; Utilize this control circuit to read a preset rules, it is interval that this preset rules defines a plurality of battery remaining powers, and those battery remaining power intervals comprise one first residual capacity interval and one second residual capacity interval; Utilize this control circuit to judge whether this battery remaining power parameter falls within this first or second residual capacity interval; When this control circuit judges that this battery remaining power parameter falls within this first residual capacity interval, according to one first charge cutoff voltage, this battery is charged; And when this control circuit judges that this battery remaining power parameter falls within this second residual capacity interval, according to one second charge cutoff voltage, this battery is charged; Wherein this first and second residual capacity is interval different, and this first and second charge cutoff voltage is different.
The method for charging batteries of embodiments of the invention offers a control circuit and carries out, by to determine a charge cutoff voltage, and then according to this charge cutoff voltage, one battery is charged, the method comprises: utilize this control circuit to read a battery status parameter, this battery status parameter comprise an actual standby time and a battery remaining power parameter at least wherein one; Utilize this control circuit to read a preset rules, it is interval that this preset rules defines a plurality of battery statuss, the plurality of battery status interval refers between a plurality of battery lay-up periods and/or a plurality of battery remaining power interval, and the plurality of battery status interval comprises between one first state area and between one second state area; Utilize this control circuit to judge whether this battery status parameter falls between this first or second state area; When this control circuit judges that this battery status parameter falls between this first state area, according to one first charge cutoff voltage, this battery is charged; And when this control circuit judges that this battery status parameter falls between this second state area, according to one second charge cutoff voltage, this battery is charged; Wherein different between this first and second state area, and this first and second charge cutoff voltage is different.
So, the present embodiment can reach following advantage: it is low that circuit is realized cost, only need to change software charging rule, can extend the life of a cell and charging method safer.
Accompanying drawing explanation
Fig. 1 is traditional lithium cell charging curve synoptic diagram;
Fig. 2 is the battery pack schematic diagram being recharged of the present invention;
Fig. 3 is the battery charging cut-off current of embodiments of the invention and the pass schematic diagram of battery health degree;
Fig. 4 is the battery charge cutoff voltage of embodiments of the invention and the pass schematic diagram of battery standby time;
Fig. 5 is the battery charge cutoff voltage of embodiments of the invention and the pass schematic diagram of battery remaining power;
Fig. 6 is that schematic diagram is closed in the battery charge cutoff voltage of embodiments of the invention and the application of battery remaining power;
Fig. 7 is the pass schematic diagram of battery charge cutoff voltage, battery remaining power and the standby time of embodiments of the invention; And
Fig. 8 is that the present invention adopts two residual capacity intervals to adjust the schematic diagram of charge cutoff voltage.
[main element description of reference numerals]
Battery 11
Switch element 14
Electric discharge switch element 14A
Exchange commercial power AC
Direct current power DC
Embodiment
According to embodiments of the invention, method for charging batteries is under constant-current charge, according to the standby time of battery (Idle time), residual capacity percentage (Relative State Of Charge; RSOC) or the combination in any of above-mentioned two kinds of bases, with linear or nonlinear preset rules, decide a suitable charge cutoff voltage, and when rising to this charge cutoff voltage, cell voltage changes constant-voltage charge into, now this method for charging batteries can, further according to the value of actual capacity (FCC), decide a suitable charging cut-off current.And under constant-voltage charge, when charging current reduces to this charging cut-off current, judge that battery is as being full of electricity.
For convenience of description, battery pack described in following examples be take lithium battery group as example, yet, this is not limitation of the present invention, every battery pack that need to determine suitable charge cutoff voltage and/or charging cut-off current, no matter whether be lithium battery group, can use method for charging batteries of the present invention.
Please refer to Fig. 2.The battery pack 10 of Fig. 2 display application charging method of the present invention.As shown in Figure 2, battery pack 10 is installed in electronic installation 30.Battery pack 10 can be charged via installed electronic installation 30, also can supply with electric power to electronic installation 30.Aforesaid electronic installation 30 can, for electronic multimedia products such as digital camera, mobile phone, personal digital assistant device or notebook computers, also can be electric carrier (as electric motor car) or other driven by power product.Battery pack 10 is installed in electronic installation 30 in removable mode conventionally.But, battery pack 10 also has and in the mode with not dismounting, is built in electronic installation 30.
Under the state that electronic installation 30 and an adapter 40 (Adapter) are electrically connected, adapter 40 converts the alternating electromotive force AC from socket (not indicating) to direct current power DC, so that electronic installation 30 is supplied with to direct current power DC.Electronic installation 30 possesses in order to control the power circuit (not icon) of the direct current power DC supplying with from adapter 40.The output of power circuit can be charged to battery pack 10, and electronic installation 30 is supplied with to electric power.In addition, from adapter 40, do not supplying with the state of electric power, battery pack 10 can be supplied with electric power to electronic installation 30.
Multiple with reference to figure 2.Control circuit 13 receives the cell voltage of each battery 11, from the output signal of current detection circuit 12 and from the output signal of Temperature Detector 16; Record battery 11 residual capacity (Remaining Capacity instantly; RC) with actual capacity (FullCharge Capacity; The numerical value such as FCC); And according to battery design capacity (DesignCapacity; DC) etc. numerical value, makes calculation process.Control circuit 13 can be according to operation result, and control switch element 14 carries out conducting or cut-out.Control circuit 13 is residual capacity percentage (RSOC) by battery 11 residual capacity (RC) instantly divided by resulting percentage after actual capacity (FCC).Control circuit 13 is battery health degree (State of Health by the actual capacity of battery 11 (FCC) divided by resulting percentage after design capacity (DC) again; SOH).Please note, control circuit 13 can comprise storage unit (figure does not show), in order to store, record and/or the numerical value of computing, because the enforcement of storage unit and the access of 13 pairs of storage units of control circuit belong to the common knowledge of the art, therefore do not repeat them here.
Moreover control circuit 13 goes out to be full of electricity with control switch element 14 from the voltage detecting of battery 11.In addition, control circuit 13, detecting while flowing into the abnormal current, abnormal temperature of battery 11 or abnormal voltage, cut off switch element 14, and breaking current is with protection battery 11.
When the voltage drop of the battery 11 discharging is during to minimum voltage, control circuit 13 cuts off electric discharge and uses switch element 14A, to interdict the discharging current of battery 11.Now, the electric discharge that is dissengaged positions can utilize parasitic diode to make charging current circulation with switch element 14A.Thereby when the voltage of circulation charging current and battery 11 rises, electric discharge just can be switched to conducting state from dissengaged positions with switch element 14A, and is the state that can discharge.
When electronic installation 30 receives direct current power DC by adapter 40, control circuit 13 obtains from telecommunication circuit 15 information that electronic installation 30 can charge to battery 10.Control circuit 13, according to this information, is controlled switch element 14B conducting for charging, and first with constant-current charge, then with constant-voltage charge, so that battery 11 is full of to electricity.
Coordinate Fig. 2, with reference to figure 3.Fig. 3 shows the schematic diagram that is related to of the battery charging cut-off current of one embodiment of the invention and battery health degree.When control circuit 13 obtains from telecommunication circuit 15 information that electronic installation 30 can charge to battery 10, the method that control circuit 13 is carried out the present embodiment to be to determine a charging cut-off current Ioff, so according to this charging cut-off current Ioff to battery 11 chargings.
The method of the present embodiment comprises following steps: first, control circuit 13 reads a battery actual capacity parameter, and aforesaid battery actual capacity parameter represents battery actual capacity (FCC) or battery health degree (SOH).The present embodiment adopts battery health degree (SOH) as the representative of battery actual capacity parameter.
Then, control circuit 13 reads a preset rules, it is interval that this preset rules defines a plurality of battery capacities, and defined those battery capacity intervals of preset rules of the present embodiment comprise one first battery capacity interval, one second battery capacity is interval and one the 3rd battery capacity is interval.In aforementioned, first, second are all different from the 3rd battery capacity interval, and the first battery capacity is interval represents that battery health degree (SOH) scope is located at 95% to 100%.The second battery capacity is interval represents that battery health degree (SOH) scope is located at 80% to 95%.The 3rd battery capacity is interval represents that battery health degree (SOH) scope is located at below 80%.
Then, it is interval that the battery actual capacity parameter that control circuit 13 judgements read falls within aforementioned which battery capacity.When control circuit 13 judgement battery actual capacity parameters fall within the first battery capacity interval, will be according to one first charging cut-off current Ioff1 to battery 11 chargings.In addition, when control circuit 13 judgement battery actual capacity parameters fall within the second battery capacity interval, will be according to one second charging cut-off current Ioff2 to battery 11 chargings.In addition, when control circuit 13 judgement battery actual capacity parameters fall within the 3rd battery capacity interval, will be according to one the 3rd charging cut-off current Ioff3 to battery 11 chargings.
In aforementioned, the first charging cut-off current Ioff1 is less than the second charging cut-off current Ioff2, and the second charging cut-off current Ioff2 is less than the 3rd charging cut-off current Ioff3.In the present embodiment, the first charging cut-off current Ioff1 and the 3rd charging cut-off current Ioff3 are essence fixed value, that is the first charging cut-off current Ioff1 is set as 150mA, and the 3rd charging cut-off current Ioff3 is set as 500mA.In addition, the second charging cut-off current Ioff2 is change value, and the size of the battery actual capacity parameter that its size reads with control circuit 13 is with respect to becoming a proportionate relationship.
So along with the decline of the residual capacity percentage (RSOC) of battery, improve the charging method of charging cut-off current Ioff, can increase the life-span of battery.
Coordinate Fig. 2, with reference to figure 4.Fig. 4 shows the schematic diagram that is related to of the battery charge cutoff voltage of embodiments of the invention and battery standby time.It is a kind of according to battery standby time that the present invention more provides, as the charging method of the setting of the charge cutoff voltage Voff of battery 11.The method of the present embodiment offers control circuit 13 and carries out, by determine a charge cutoff voltage Voff, and then according to charge cutoff voltage Voff with to battery 11 chargings.
The method of the present embodiment comprises following steps: first, control circuit 13 records an actual standby time (idle time) of battery 11.Then, control circuit 13 reads a preset rules, this preset rules defines between a plurality of battery lay-up periods, between those battery lay-up periods of the present embodiment, comprise between one first battery lay-up period, between one second battery lay-up period and between one the 3rd battery lay-up period, in aforementioned, first, second from the 3rd lay-up period between all different.
Then fall between aforementioned which battery lay-up period the actual standby time (idle time) that, control circuit 13 judgements are recorded.When fall between the first battery lay-up period the actual standby time of control circuit 13 judgement batteries 11, will be according to one first charge cutoff voltage Voff1 to battery 11 chargings.In addition, when fall between the second battery lay-up period the actual standby time of control circuit 13 judgement batteries 11, will be according to one second charge cutoff voltage Voff2 to battery 11 chargings.In addition, when fall between the 3rd battery lay-up period the actual standby time of control circuit 13 judgement batteries 11, will be according to one the 3rd charge cutoff voltage Voff3 to battery 11 chargings.
In aforementioned, the first charge cutoff voltage Voff1 is greater than the second charge cutoff voltage Voff2, and the second charge cutoff voltage Voff2 is greater than the 3rd charge cutoff voltage Voff3.In the present embodiment, the first charge cutoff voltage Voff1 and the 3rd charge cutoff voltage Voff3 are essence fixed value, that is the first charge cutoff voltage Voff1 is set as 4.2V/ battery, and the 3rd charge cutoff voltage Voff3 is set as 4.1V/ battery.In addition, the second charge cutoff voltage Voff2 is change value, its size with the size of actual standby time of control circuit 13 battery that records 11 with respect to becoming a proportionate relationship.
In the present embodiment, the standby time that control circuit 13 is judged battery 11 is while surpassing 24HR, originally predeterminated voltage value Δ V to the 4.19V/ battery of the charge cutoff voltage Voff decline 10mV/ battery of 4.2V/ battery will be set, and to record charge cutoff voltage Voff be 4.19V/ battery.Then, the standby time of battery 11 is while again surpassing 24HR, control circuit 13 is the front charge cutoff voltage Voff that once notes down 4.19V/ battery predeterminated voltage value Δ V to the 4.18V/ battery of 10mV/ battery that declines again, and to record charge cutoff voltage Voff be 4.18V/ battery.By that analogy, charge cutoff voltage Voff is along with decline until after 4.1V/ battery standby time, if, battery 11 is still in idle state, control circuit 13 directly rises to 4.2V/ battery by the charge cutoff voltage Voff that sets 4.1V/ battery, and to record charge cutoff voltage Voff be 4.2V/ battery, and continue the aforesaid record step of execution that repeats.
So, the charging method of the present embodiment is, the number of times that surpasses Preset Time (24HR) according to battery 11 standby times, the size of relative modulation charge cutoff voltage Voff, makes being set between 4.2V/ battery and 4.1V/ battery of charge cutoff voltage Voff repetition.So, when control circuit 13 obtains from telecommunication circuit 15 information that electronic installation 30 can charge to battery 10, control circuit 13 utilizes the charge cutoff voltage Voff noting down, and usings and as battery 11, from constant-current charge, transfers the foundation of constant-voltage charge to.
Coordinate Fig. 2, with reference to figure 5.Fig. 5 shows the schematic diagram that is related to of the battery charge cutoff voltage of embodiments of the invention and battery remaining power.The present invention more provides and does not surpass Preset Time (24HR for example, but not as limit a kind of standby time at battery 11.Please note, the art has knows that the knowledgeable is appreciated that this embodiment is not setting under the situation of Preset Time conventionally, still can implement) time, along with the battery remaining power parameter of battery 11, to fall into a battery remaining power interval, and interval with respect to this battery remaining power, to reduce, to improve or to maintain the charging method of the charge cutoff voltage Voff of battery 11.
The method of the present embodiment offers control circuit 13 and carries out, so as to determining a charge cutoff voltage Voff, and then according to charge cutoff voltage Voff with to battery 11 chargings.
The method of the present embodiment comprises following steps: first, control circuit 13 reads a battery remaining power parameter, and this battery remaining power parameter represents battery remaining power (RemainingCapacity; RC) or the percentage of this battery remaining power after divided by battery actual capacity (Full ChargeCapacity), i.e. residual capacity percentage (RSOC).Then, control circuit 13 reads a preset rules, and it is interval that this preset rules defines a plurality of battery remaining powers, and those battery remaining power intervals of the present embodiment comprise one first residual capacity interval, one second residual capacity is interval and one the 3rd residual capacity is interval.In aforementioned, first, second are all different from the 3rd residual capacity interval.
Then, it is interval that the battery remaining power parameter that control circuit 13 judgements read falls within aforementioned which residual capacity.When control circuit 13 judgement battery remaining power parameters fall within the first residual capacity interval, will be according to one first charge cutoff voltage to battery 11 chargings.In addition, when control circuit 13 judgement battery remaining power parameters fall within this second residual capacity interval, will be according to one second charge cutoff voltage to battery 11 chargings.In addition, when control circuit 13 judgement battery remaining power parameters fall within the 3rd residual capacity interval, will be according to one the 3rd charge cutoff voltage to battery 11 chargings.In aforementioned, first, second is from the 3rd charge cutoff voltage, at least the two is different.
Multiple with reference to figure 2 and Fig. 5.In the present embodiment, the first residual capacity is interval represents that residual capacity percentage (RSOC) scope is located at 100%～80%, the 3rd residual capacity is interval represents that residual capacity percentage (RSOC) scope is located at below 20%, and the second residual capacity is interval represents that residual capacity percentage (RSOC) scope is located at respectively 80%～60%, 60%～40%, 40%～20%.
And, with respect to aforementioned five kinds of residual capacity percentages (RSOC) scope, provide respectively a correction voltage.In aforementioned, the correction voltage of the correction voltage of 100%～80% scope correspondence-20mV/ battery, 80%～60% scope correspondence-10mV/ battery, the correction voltage of the corresponding 0mV/ battery of 60%～40% scope, correction voltage and the 20% following scope of 40%～20% scope correspondence+10mV/ battery are fixed as 4.2V/ battery.
In the present embodiment, when control circuit 13 obtains from telecommunication circuit 15 information that electronic installation 30 can charge to battery 10, which residual capacity percentage (RSOC) scope the residual capacity percentage (RSOC) of control circuit 13 judgement batteries 11 falls into, and according to corresponding correction voltage, set the size of charge cutoff voltage Voff record in addition, using and as battery 11, from constant-current charge, transfer the foundation of constant-voltage charge to.
Multiple with reference to figure 5.In application, when the residual capacity percentage (RSOC) of battery 11 falls into 100%～80% scope, charge cutoff voltage Voff reduces the correction voltage of 20mV/ battery from 4.2V/ battery, become 4.18V/ battery record.Then,, while falling into 80%～60% scope, charge cutoff voltage Voff reduces the correction voltage of 10mV/ battery from 4.18V/ battery, become 4.17V/ battery record.Then,, while falling into 60%～40% scope, maintain the magnitude of voltage of recorded charge cutoff voltage Voff at 4.17V/ battery.Then,, while falling into 40%～20% scope, charge cutoff voltage Voff improves the correction voltage of 10mV/ battery from 4.17V/ battery, become 4.18V/ battery record.Then,, while being less than 20% scope, charge cutoff voltage Voff is directly increased to 4.2V/ battery record from 4.18V/ battery.
Multiple with reference to figure 6.Fig. 6 shows that the battery charge cutoff voltage of embodiments of the invention and the application of battery remaining power are related to schematic diagram.In the each charging of battery 11 application, when the residual capacity percentage (RSOC) of battery 11 is 10%, charge cutoff voltage Voff is made as 4.2V/ battery record.Charging, and the residual capacity percentage (RSOC) of battery 11 is again 95%, and charge cutoff voltage Voff reduces 20mV/ battery from 4.2V/ battery, and is made as 4.18V/ battery record.Charging again, the residual capacity percentage (RSOC) of battery 11 is 10%, charge cutoff voltage Voff will directly bring up to 4.2V/ battery record from 4.18V/ battery.Charging again, when the residual capacity percentage (RSOC) of battery 11 is 70%, charge cutoff voltage Voff reduces 10mV/ battery to 4.19V/ battery record from 4.2V/ battery.Charging again, the residual capacity percentage (RSOC) of battery 11 is 30%, charge cutoff voltage Voff is from 4.19V/ battery rising 10mV/ battery to 4.2V/ battery record.Charging again, the residual capacity percentage (RSOC) of battery 11 is 50%, charge cutoff voltage Voff maintains 4.2V/ battery.
Coordinate Fig. 2, with reference to figure 7, show embodiments of the invention battery charge cutoff voltage, battery remaining power and standby time be related to schematic diagram.
When control circuit 13 obtains from telecommunication circuit 15 information that electronic installation 30 can charge to battery 10, control circuit 13 judges the residual capacity percentage (RSOC) of battery and the standby times of battery 11, and according to judged result, set the size of charge cutoff voltage Voff record in addition, using and as battery 11, from constant-current charge, transfer the foundation of constant-voltage charge to.
The method of the present embodiment offers control circuit 13 and carries out, by determine a charge cutoff voltage Voff, and then according to charge cutoff voltage Voff with to battery 11 chargings.The method of the present embodiment comprises following steps: first, control circuit 13 reads a battery status parameter, this battery status parameter comprise aforementioned carried actual standby time (idle time) and battery remaining power parameter at least one of them.
Then, control circuit 13 reads a preset rules, and it is interval that this preset rules defines a plurality of battery statuss, and the plurality of battery status interval refers between aforementioned carried a plurality of battery lay-up periods and/or a plurality of battery remaining power interval.The plurality of battery status interval comprises the interval G3 of G2 and a third state between G1 between one first state area, one second state area, wherein this first, second all different with third state interval (G1, G2, G3).
Then, the battery status parameter that control circuit 13 judgements read falls between aforementioned which state area.When control circuit 13 judgement battery status parameters fall between the first state area G1, will be according to one first charge cutoff voltage to battery 11 chargings.In addition, when control circuit 13 judgement battery status parameters fall between this second state area G2, will be according to one second charge cutoff voltage to battery 11 chargings.In addition, when control circuit 13 judgement battery status parameters fall within the interval G3 of this third state, will be according to one the 3rd charge cutoff voltage to battery 11 chargings, wherein, this first, second from the 3rd charge cutoff voltage, at least the two is different.
As shown in Figure 7, curve B is the charge cutoff voltage Voff of battery 11, and curve C is the value of the residual capacity percentage (RSOC) of battery 11.Charge cutoff voltage Voff can surpass along with the standby time of every primary cell 11 Preset Time (24HR), and reduces predeterminated voltage value Δ V record.What therefore, the charge cutoff voltage Voff of battery 11 can repeat is set between 4.1V/ battery and 4.2V/ battery.In addition, do not surpass Preset Time (24HR for example, but not as limit the standby time of battery 11.Please note, one of ordinary skill in the art will appreciate that this embodiment is not setting under the situation of Preset Time, still can implement) time, the battery remaining power that charge cutoff voltage Voff can fall into respect to the residual capacity percentage (RSOC) of battery 11 is interval, and relatively reduces, improves or maintain.
So, the method for charging batteries of the present embodiment is mainly at least one of them change of actual standby time (idle time) along with battery and residual capacity percentage (RSOC) and adjusts suitable charge cutoff voltage, and, charge cutoff voltage is not fixed value, its meeting is along with the current state of battery 11 changes to some extent, and then the efficiency for charge-discharge of increase battery 11.Meanwhile, the method for charging batteries of the present embodiment provides the clever type charging modes of self-teaching, and this kind of charging modes can record user's use habit, so that the charge cutoff voltage of battery 11 is done and repaiied or lower, by with extending battery life.In addition, the present embodiment reaches after this charge cutoff voltage having determined that a charge cutoff voltage and battery also charge, can be again according to the corresponding embodiment of Fig. 3 according to battery health degree (SOH) to adjust charging cut-off current, that is the embodiment shown in Fig. 7 can be combined with the embodiment shown in Fig. 3, and become another embodiment.
Please note, although aforementioned each embodiment be take respectively between three battery capacity intervals, three battery lay-up periods and three residual capacity intervals are example, enforcement of the present invention also can only adopt two battery capacity intervals to adjust between charging cut-off current, two battery lay-up periods and/or charge cutoff voltage is adjusted in two residual capacity intervals.As shown in Figure 8, it adjusts the schematic diagram of charge cutoff voltage for the present invention adopts two residual capacity intervals, as shown in Figure 8, when residual capacity percentage (RSOC) is positioned at 100% to 50% interval, charging cut-off electric weight is decremented to 4.1V by 4.2V gradually along with the minimizing of RSOC; And when residual capacity percentage (RSOC) is positioned at 50% to 0% interval, charging cut-off electric weight is incremented to 4.2V by 4.1V gradually along with the minimizing of RSOC.Because the art has each embodiment that conventionally knows that the knowledgeable can be interval according to disclosed three, derive two intervals or three above interval execution modes, therefore no longer implement to be repeated for different interval number objects in this.
But the above, be only detailed description and the accompanying drawing of the best specific embodiment of the present invention, those of ordinary skills in the field of the invention, can think easily and variation or revise all can be encompassed in protection scope of the present invention.
Claims (7)
1. a method for charging batteries, offers a control circuit and carries out, and it is characterized in that, so as to determining a charge cutoff voltage, and then according to this charge cutoff voltage, one battery is charged, the method comprises:
Utilize this control circuit to record an actual standby time of this battery;
Utilize this control circuit to read a preset rules, this preset rules defines between a plurality of battery lay-up periods and a plurality of charge cutoff voltage, between those battery lay-up periods, comprise between one first battery lay-up period and between one second battery lay-up period, those charge cutoff voltages comprise one first charge cutoff voltage and one second charge cutoff voltage, and between this first battery lay-up period to should the first charge cutoff voltage, between this second battery lay-up period to should the second charge cutoff voltage;
Utilize this control circuit to judge and whether fall within this actual standby time between this first or second battery lay-up period;
When this control circuit judges while falling within this actual standby time between this first battery lay-up period, according to this first charge cutoff voltage to this battery charging; And
When this control circuit judges that this battery actual capacity falls between this second battery lay-up period, according to this second charge cutoff voltage, this battery is charged;
Wherein different between this first and second lay-up period, and this first charge cutoff voltage is greater than this second charge cutoff voltage.
2. method for charging batteries as claimed in claim 1, is characterized in that, this first charge cutoff voltage essence is fixed, this second charge cutoff voltage change.
3. method for charging batteries as claimed in claim 1, is characterized in that, more comprise between one the 3rd battery lay-up period and one the 3rd charge cutoff voltage, and the method further comprises the following step between the plurality of battery lay-up period:
Whether utilize this control circuit to judge falls between the 3rd battery lay-up period this actual standby time; And
When this control circuit judges that this battery actual capacity falls between the 3rd battery lay-up period, according to the 3rd charge cutoff voltage, this battery is charged;
Wherein this first, second from the 3rd lay-up period between all different, and this first charge cutoff voltage is greater than this second charge cutoff voltage, this second charge cutoff voltage is greater than the 3rd charge cutoff voltage.
4. a method for charging batteries, offers a control circuit and carries out, and it is characterized in that, so as to determining a charge cutoff voltage, and then according to this charge cutoff voltage, one battery is charged, the method comprises:
Utilize this control circuit to read a battery remaining power parameter, this battery remaining power parameter represents the percentage after a battery remaining power or this battery remaining power are divided by a battery actual capacity;
Utilize this control circuit to read a preset rules, this preset rules defines a plurality of battery remaining powers interval and a plurality of charge cutoff voltages, those battery remaining power intervals comprise one first residual capacity interval and one second residual capacity interval, those charge cutoff voltages comprise one first charge cutoff voltage and one second charge cutoff voltage, and this first residual capacity interval is to should the first charge cutoff voltage, this second residual capacity interval is to should the second charge cutoff voltage;
Utilize this control circuit to judge whether this battery remaining power parameter falls within this first or second residual capacity interval;
When this control circuit judges that this battery remaining power parameter falls within this first residual capacity interval, according to this first charge cutoff voltage, this battery is charged; And
When this control circuit judges that this battery remaining power parameter falls within this second residual capacity interval, according to this second charge cutoff voltage, this battery is charged;
Wherein this first and second residual capacity is interval different, and this first and second charge cutoff voltage is different.
5. method for charging batteries as claimed in claim 4, is characterized in that, during the plurality of battery remaining power interval more comprises one the 3rd residual capacity and one the 3rd charge cutoff voltage, and the method further comprises the following step:
During utilizing this control circuit to judge whether this battery remaining power parameter falls within the 3rd residual capacity; And
When this control circuit judges that this battery remaining power parameter falls within the 3rd residual capacity interval, according to the 3rd charge cutoff voltage, this battery is charged;
Wherein this first, second all different from the 3rd residual capacity interval, and this first, second from the 3rd charge cutoff voltage, at least the two is different.
6. a method for charging batteries, is characterized in that, offers a control circuit and carries out, and so as to determining a charge cutoff voltage, and then according to this charge cutoff voltage, one battery is charged, and the method comprises:
Utilize this control circuit to read a battery status parameter, this battery status parameter comprise an actual standby time and a battery remaining power parameter at least one of them;
Utilize this control circuit to read a preset rules, this preset rules defines a plurality of battery statuss interval and a plurality of charge cutoff voltages, the plurality of battery status interval refers between a plurality of battery lay-up periods and/or a plurality of battery remaining power interval, the plurality of battery status interval comprises between one first state area and between one second state area, those charge cutoff voltages comprise one first charge cutoff voltage and one second charge cutoff voltage, and this first battery status interval is to should the first charge cutoff voltage, this second battery status interval is to should the second charge cutoff voltage;
Utilize this control circuit to judge whether this battery status parameter falls between this first or second state area;
When this control circuit judges that this battery status parameter falls between this first state area, according to this first charge cutoff voltage, this battery is charged; And
When this control circuit judges that this battery status parameter falls between this second state area, according to this second charge cutoff voltage, this battery is charged;
Wherein different between this first and second state area, and this first and second charge cutoff voltage is different.
7. method for charging batteries as claimed in claim 6, is characterized in that, the plurality of battery status interval more comprises third state interval and one the 3rd charge cutoff voltage, and the method further comprises the following step:
Utilize this control circuit to judge whether this battery status parameter falls within this third state interval; And
When this control circuit judges that this battery status parameter falls within this third state interval, according to the 3rd charge cutoff voltage, this battery is charged;
Wherein this first, second all different from third state interval, and this first, second from the 3rd charge cutoff voltage, at least the two is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010111742.3A CN102148410B (en) | 2010-02-09 | 2010-02-09 | Method for charging battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010111742.3A CN102148410B (en) | 2010-02-09 | 2010-02-09 | Method for charging battery |
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| CN102148410B true CN102148410B (en) | 2014-02-12 |
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| CN201010111742.3A Expired - Fee Related CN102148410B (en) | 2010-02-09 | 2010-02-09 | Method for charging battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104037462B (en) | 2013-03-08 | 2016-04-27 | 华硕电脑股份有限公司 | Battery module and overcharge protection method |
| CN105305514A (en) * | 2014-06-23 | 2016-02-03 | 中兴通讯股份有限公司 | Method and device for charging battery |
| WO2017214852A1 (en) * | 2016-06-14 | 2017-12-21 | 宁德新能源科技有限公司 | Battery charging method and device and battery system |
| CN106785132A (en) * | 2016-11-30 | 2017-05-31 | 东莞新能源科技有限公司 | Charging method and device |
| CN106655396B (en) * | 2017-01-13 | 2019-02-12 | Oppo广东移动通信有限公司 | Charge control method, device and terminal |
| CN113273050A (en) * | 2019-03-25 | 2021-08-17 | Oppo广东移动通信有限公司 | Battery charging method, device, equipment and readable storage medium |
| CN110850310B (en) * | 2019-12-20 | 2022-04-15 | 东软睿驰汽车技术（沈阳）有限公司 | Battery safety testing method and device |
| CN111293378B (en) * | 2020-05-09 | 2020-08-14 | 北京小米移动软件有限公司 | Charging method for prolonging cycle life of lithium ion battery |
| CN116018707A (en) * | 2020-09-29 | 2023-04-25 | 宁德时代新能源科技股份有限公司 | Battery charging method, device and storage medium |
| CN113767539B (en) * | 2020-12-25 | 2024-03-08 | 宁德新能源科技有限公司 | Charging method, electronic device, and storage medium |
| CN112910054B (en) * | 2021-03-18 | 2024-06-04 | 维沃移动通信有限公司 | Charging circuit, charging device, electronic apparatus, and charging control method |
| CN116615853A (en) * | 2021-07-28 | 2023-08-18 | 宁德时代新能源科技股份有限公司 | Charging method, charging device, vehicle and computer readable storage medium |
| CN116073000B (en) | 2021-10-29 | 2024-01-23 | 宁德时代新能源科技股份有限公司 | Charging method, device, apparatus and computer storage medium for secondary battery |
| CN116169733A (en) * | 2021-11-25 | 2023-05-26 | 中兴通讯股份有限公司 | Charging control method, system, terminal device, charger and storage medium |
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