CN1845418A - Quick charge method and device - Google Patents
Quick charge method and device Download PDFInfo
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- CN1845418A CN1845418A CNA2006100349906A CN200610034990A CN1845418A CN 1845418 A CN1845418 A CN 1845418A CN A2006100349906 A CNA2006100349906 A CN A2006100349906A CN 200610034990 A CN200610034990 A CN 200610034990A CN 1845418 A CN1845418 A CN 1845418A
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- battery
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- charging
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The quick charge method special to Li+ and polymer Li+ cell comprises: with Ohm voltage-drop compensation, and enlarging properly the limit voltage between two electrodes. Wherein, the set cell limit voltage Vx should be larger than the limit voltage V between cell electrodes. This invention is simple and convenient to spread.
Description
Technical field
Fast Charge-Up Method and Charging Unit of the present invention belongs to the cell apparatus field, particularly relates to a kind of lithium ion, polymer Li-ion battery quick charge method and charging device.
Background technology
Need serondary lithium battery is carried out quick charge or emergent charging in many occasions, finishing in the shortest time, battery continues to use, and does not need reserve battery.When adopting constant-current constant-voltage charging, when constant current charge battery both end voltage equals deboost V
xThe time, charging transfers constant voltage charge automatically to, and at this moment charging current reduces gradually, and the charging interval is long.The researcher proposes many quick charge method for many years, and some method is able in application of special occasions, the charger that some method is made or loaded down with trivial details or price is expensive, or inapplicable, and can not apply.Charging deboost V
xBe to entire cell control, the large current charge time long (it is long to reach the deboost time) is wished in quick charge, or charging termination when reaching deboost; Or constant voltage time is short, and electric current is also enough big, wishes to fill electric weight into as much as possible.
Summary of the invention
The objective of the invention is to avoid the deficiencies in the prior art part and a kind of method simply and easily and device are provided, adopt ohm voltage drop compensation and the suitable method that increases the deboost between battery the two poles of the earth to realize that the large current charge time is long, it is many to charge into electric weight, method is simple, effective, practical, is easy to promote.
The objective of the invention is to reach quick charge by following measure.Flow through electric current during battery charge, the battery both end voltage is made up of two parts, and a part is the potential difference between the battery plus-negative plate, and another part is the pressure drop △ V on the battery Ohmic resistance, △ V=IR
Ω, I is a charging current, R
ΩBeing the ohmic internal resistance of battery, is inside battery because the conduction resistance of ion, electronics causes.During charging, battery limitation voltage V
xBe to entire cell control, i.e. V
x=V+IR
ΩV is the deboost between battery the two poles of the earth.Adopt the method for ohm voltage drop compensation to compensate IR
Ω, promptly be on the deboost V between the two poles of the earth, to increase △ V=IR
Ω, make V
x=V+IR
Ω, promptly compensated ohm voltage drop.V is artificial the setting, and I is the charging direct current, can be constant, also can change R
ΩBe known, manufacturer provides R at the battery Shi Douhui that dispatches from the factory
ΩIndex.
Charging method of the present invention is exactly the charging deboost V that determines earlier between battery the two poles of the earth, the battery limitation voltage V of setting
xBe greater than the deboost V between the battery plus-negative plate, V
x=V+IR
Ω
In lithium rechargeable battery, electrode process generally is by Li
+Solid-state diffusion control, Li
+Solid-state diffusion speed is very slow, therefore produces considerable concentration polarization.Active material bed thickness on the pole piece, concentration polarization is big, and inhomogeneous, so, in order to guarantee the life-span of battery, with LiCoO
2The deboost that generally designs between the two poles of the earth for the lithium rechargeable battery of positive active material is 4.2 ± 0.03V, active material layer will approach much on the battery pole piece of high-power design, little and the good uniformity of concentration polarization, deboost when therefore charging between the two poles of the earth can suitably improve, and can improve 0～0.3V on common deboost.Charging deboost between power-type battery the two poles of the earth wants specific capacity type battery big, and the deboost between power-type battery the two poles of the earth artificially is set to V+IR
Ω, set battery charge deboost V
xBe greater than the deboost V between the battery plus-negative plate, on the deboost V between battery the two poles of the earth, increase △ V=IR again
Ω, V
x=V+IR
Ω+ IR
Ω
When the battery DC charging, on the deboost V between the two poles of the earth, increase a magnitude of voltage △ V again.△ V=IR
Ω, wherein I is a charging current, R
ΩIt is the ohmic internal resistance of battery.Charging current is the direct current greater than 1C (mA), can be constant, can not be constant also.Ohmic internal resistance can be known in advance, also can be instant measurement the in the charging device, but all should be the internal resistance of cell that records with the 1000Hz alternating current.The voltage of large current charge reaches duration t 〉=0min behind the deboost.Duration t=0min, rechargeable battery reach deboost and just stop charging.T＞0min generally is charging in limited time, and the time is very short, and charging current also can be enough big.The internal resistance that general battery manufacturers provides is bigger than normal, during actual the use, and R
ΩGet the internal resistance that manufacturer provides and multiply by 80～90% value.
Charging method of the present invention is exactly the battery limitation voltage V that is provided with
xBe greater than the deboost V between the battery plus-negative plate, charging to deboost V
xAfter, stop charging immediately.Also can be at deboost V
xTo battery charging in limited time.Also can adopt when charging reaches deboost, transfer constant voltage charge to, constant voltage is V.
For lithium ion battery and polymer Li-ion battery, the deboost between two electrodes is got V=3.5～4.6V.
The charging device that utilizes fast charge method of the present invention to make is set battery charge deboost V
xBe greater than the deboost V between the battery plus-negative plate.Battery charge deboost V
x=V+ △ V, △ V=IR
Ω, wherein I is a charging current, R
ΩBe the ohmic internal resistance of battery, V is two interelectrode deboosts in the battery.Charging to deboost V
xAfter, stop charging immediately.Charging to deboost V
xAfter, battery is charging in limited time.When charging reaches deboost, transfer constant voltage charge to, constant voltage is V.
Utilize fast charge method of the present invention can make charger, the major loop of charger is by stabilized voltage power supply, current-limiting resistance, be recharged the pond, sample resistance constitutes, and operational amplifier and transistor circuit constitute current regulator, and operational amplifier is according to the current sampling voltage of sample resistance and the current settings reference voltage that is provided by regulator potentiometer, after relatively amplifying, provide transistorized control base current.Resistance and potentiometer are the sample circuit of battery charging voltage; supply with comparator reverse input end voltage; provide the protection reference voltage by potentiometer; supply with comparator input terminal voltage in the same way; comparator with this two voltage ratio; the setting of circuit makes comparator overturn when two pole tensions of battery reach deboost V just, and normal the battle connected shunt resistance, and the open-circuit voltage values of electric resistance partial pressure equals the deboost of battery two interpolars just.Stop charging after reaching deboost, this moment, charging finished; If charging in limited time, comparator upset back relay power, normally opened contact is realized self-locking, the normal battle connected shunt resistance, thereby the charging voltage of battery is reduced in the safety value.
Utilize fast charge method of the present invention can make electronic component, be fitted together with battery core pack.
The present invention is simple, effective, practical, is easy to promote, and charging can be filled electric weight into as much as possible soon again.
Description of drawings
Accompanying drawing 1 is an embodiment charging principle of charger of the present invention figure.
Accompanying drawing 2 is an embodiment charging principle of charger of the present invention figure.
Accompanying drawing 3 is an embodiment charging principle of charger of the present invention figure.
Embodiment
The invention will be further described below in conjunction with embodiment and accompanying drawing.
Embodiment 1: polymer Li-ion battery 431433 (capacity type battery)
Rated capacity 150mAh, internal resistance 200m Ω
| Charging modes | System | Charging interval (min) | Discharge capacity (mAh) 0.5C discharge 3.0V stops |
| 1 | 0.5C constant current charge transfers constant voltage charge to 4.2V, when electric current is reduced to 1/20C, stops charging | 150 | 150 |
| 2 | The 2C constant current charge, 4.26V constant voltage, 30min in limited time | 30 | 143 |
Mode 2 is methods of the present invention, mode 2 and mode 1 ratio, time decreased 80%, the capacity that fills into reaches 93%.Here set V
x=4.2V.
Embodiment 2: polymer Li-ion battery 501417H (power-type battery)
Rated capacity 50mAh, internal resistance 120m Ω
| Charging modes | System | Charging interval (min) | Discharge capacity (mAh) 8C discharge 3.0V stops |
| 1 | The 1C constant current charge transfers constant voltage charge to 4.2V, when electric current is reduced to 1/10C, stops charging | 70 | 54 |
| 2 | The 3C constant current charge, 4.34V stops | 22 | 54 |
| 3 | The 4C constant current charge, 4.36V stops | 16.5 | 54 |
Mode 2, mode 3 are fast methods of the present invention, and with mode 1 ratio, mode 2,3 charging intervals of mode shorten 68.6%, 76.4% respectively, charge and discharge circulation with this system, still keep 90% of existing capacity 300 times.Here set V=4.33V
As shown in Figure 1, charger of the present invention adopts large current charge, and cell voltage reaches deboost, charging termination.The major loop of charger is by stabilized voltage power supply U, current-limiting resistance R
2, be recharged pond E, sample resistance R
7Constitute.Operational amplifier U
2And transistor T
1Interlock circuit constitutes current regulator.Operational amplifier U
2According to sample resistance R
7Current sampling voltage and by regulator potentiometer R
V2The current settings reference voltage that provides after relatively amplifying, provides transistor T
1The control base current with guarantee the charging first valency section be the constant current large current charge.To add the speed of charging quickly, if charging current reduces to have departed from set point, R
7The sampling voltage of resistance reduces, operational amplifier U
2Output voltage reduces, transistor T
1Electric current reduces, current-limiting resistance R
2The pressure drop step-down, battery charging voltage rises.Thereby charging current is gone back up near the set point, otherwise, if increasing, charging stream departed from set point, sample resistance R
7Voltage rises.Cause operational amplifier U
2Output voltage raises, transistor T
1Electric current strengthens, current-limiting resistance R
2It is big that pressure drop becomes, and battery charging voltage reduces, from and make charging current go back up near the set point resistance R
4With potentiometer R
V3Be the sample circuit of battery charging voltage, sampling voltage and battery both end voltage and current sampling resistor both end voltage sum are proportional.By potentiometer R
V1The protection reference voltage is provided.Comparator U
1With this two voltage ratio, the setting of circuit makes comparator overturn when the voltage between two electrodes of battery reaches deboost just, when therefore protecting voltage to set, is to consider deboost between battery two electrodes, sample resistance R
7Pressure drop and inside battery ohm voltage drop three part sums, when charging reaches deboost, the relay J action, normally opened contact J1 closure realizes the relay self-locking, and normally-closed contact J2 disconnects, and stops charging, and light-emitting diode D2 lights, and the expression charging finishes.
As shown in Figure 2, charger of the present invention adopts the constant current pressure limiting regularly to charge.The major loop of charger is by stabilized voltage power supply U, current-limiting resistance R
2, be recharged pond E, sample resistance R
7Constitute.Operational amplifier U
2And transistor T
1Interlock circuit constitutes current regulator.Operational amplifier U
2According to sample resistance R
7Current sampling voltage and by regulator potentiometer R
V2The current settings reference voltage that provides after relatively amplifying, provides transistor T
1The control base current with guarantee the charging first valency section be the constant current large current charge.To add the speed of charging quickly, if charging current reduces to have departed from set point, R
7The sampling voltage of resistance reduces, operational amplifier U
2Output voltage reduces, transistor T
1Electric current reduces, current-limiting resistance R
2The pressure drop step-down, battery charging voltage rises.Thereby charging current is gone back up near the set point, otherwise, if increasing, charging stream departed from set point, sample resistance R
7Voltage rises.Cause operational amplifier U
2Output voltage raises, transistor T
1Electric current strengthens, current-limiting resistance R
2It is big that pressure drop becomes, and battery charging voltage reduces, from and charging current is gone back up near the set point.Resistance R
4With potentiometer R
V3Be the sample circuit of battery charging voltage, sampling voltage and battery both end voltage and current sampling resistor both end voltage sum are proportional.By potentiometer R
V1The protection reference voltage is provided.Comparator U
1With this two voltage ratio, the setting of circuit makes comparator overturn when the voltage between two electrodes of battery reaches deboost just, when therefore protecting voltage to set, is to consider deboost between battery two electrodes, sample resistance R
7Pressure drop and inside battery ohm voltage drop three part sums.The relay J energising of comparator upset back, normally opened contact J
2Realize self-locking, the J of often making war
1With shunt resistance R
3Connect, thereby the charging voltage of battery is reduced in the safety value.Resistance R
2, R
3The open-circuit voltage values of dividing potential drop equals the deboost of battery two electrodes just, therefore in follow-up battery charging process, because the voltage between battery the two poles of the earth rises, can cause that charging current reduces, and voltage is lower than the deboost between two electrodes all the time, has only under the state that is full of entirely, when charging current is zero, the voltage at battery two ends just just equals the pole plate deboost, thereby has guaranteed the reliability of battery charge.The method of constant current can be multiple in the charging device.The key of this device has been the ohm voltage drop compensation, has the charging deboost to set, and △ V follows the function of variation when having charging current to change." be timer, setting-up time is with the control charging interval for s in the circuit.
As shown in Figure 3, the major loop of charger of the present invention is by stabilized voltage power supply U, current-limiting resistance R
2, be recharged pond E, sample resistance R
7Constitute.Operational amplifier U
2And transistor T
1Interlock circuit constitutes current regulator.Operational amplifier U
2According to sample resistance R
7Current sampling voltage and by regulator potentiometer R
V2The current settings reference voltage that provides after relatively amplifying, provides transistor T
1The control base current with guarantee the charging first valency section be the constant current large current charge.To add the speed of charging quickly, if charging current reduces to have departed from set point, R
7The sampling voltage of resistance reduces, operational amplifier U
2Output voltage reduces, transistor T
1Electric current reduces, current-limiting resistance R
2The pressure drop step-down, battery charging voltage rises.Thereby charging current is gone back up near the set point, otherwise, if increasing, charging stream departed from set point, sample resistance R
7Voltage rises, and causes operational amplifier U
2Output voltage raises, transistor T
1Electric current strengthens, current-limiting resistance R
2It is big that pressure drop becomes, and battery charging voltage reduces, from and charging current is gone back up near the set point.Resistance R
4With potentiometer R
V3Be the sample circuit of battery charging voltage, sampling voltage and battery both end voltage and current sampling resistor both end voltage sum are proportional.By potentiometer R
V1The protection reference voltage is provided.Comparator U
1With this two voltage ratio, the setting of circuit makes comparator overturn when the voltage between two electrodes of battery reaches deboost just, when therefore protecting voltage to set, is to consider deboost between battery two electrodes, sample resistance R
7Pressure drop and inside battery ohm voltage drop three part sums.When voltage reaches deboost between the charging battery electrode, relay J 1 action, the self-locking of the closed realization of normally opened contact J1-1 relay, the closed shunt resistance R3 that connects of normally opened contact J1-2, battery charging voltage is dropped within the safe range, the R3 parameter is selected to be cooperated with R2 when making the rechargeable battery electric current be zero, and the R3 both end voltage is just for equaling the deboost between battery two electrodes.The access of R3, battery charging voltage is reduced, charging current descends, therefore charging rate descends gradually, and when charging current reduces during a certain numerical value, the current sampling voltage after being amplified by U3 moves relay J 2, the closed realization of normally opened contact J2-1 self-locking, normally-closed contact J2-2 disconnects, complete charge, and provide charging termination by indicator light D4 and show.
Claims (9)
1. fast charge method, the battery both end voltage is made up of two parts, and a part is the potential difference between the battery plus-negative plate, and another part is the pressure drop Δ V on the battery Ohmic resistance, Δ V=IR
Ω, I is a charging current, R
ΩBe the ohmic internal resistance of battery, it is characterized in that setting battery charge deboost V
xBe greater than the deboost V between the battery plus-negative plate.
2. fast charge method according to claim 1 is characterized in that battery charge deboost V
x=V+ Δ V, Δ V=IR
Ω, wherein I is a charging current, R
ΩBe the ohmic internal resistance of battery, V is two interelectrode deboosts in the battery.
3. according to the described fast charge method of claim 1, it is characterized in that on the deboost V between battery the two poles of the earth, increasing Δ V=IR again
Ω, V
x=V+IR
Ω+ IR
Ω
4. fast charge method according to claim 1 is characterized in that charging to deboost V
xAfter, stop charging immediately.
5. fast charge method according to claim 1 is characterized in that at deboost V
xTo battery charging in limited time.
6. fast charge method according to claim 1 is characterized in that transferring constant voltage charge to when charging reaches deboost, and constant voltage is V.
7. the charging device that fast charge method according to claim 1 is made, the two ends that it is characterized in that comparison amplifier are imported battery both end voltage and battery charge deboost respectively, comparator upset when the battery both end voltage equals battery limitation voltage, the battery both end voltage is limited in the voltage between battery the two poles of the earth.
8. charging device according to claim 7 is characterized in that the stabilized voltage power supply U of charger, current-limiting resistance R
2, be recharged pond E, sample resistance R
7Constitute operational amplifier U
2And transistor T
1Circuit constitutes current regulator, operational amplifier U
2According to sample resistance R
7Current sampling voltage and by regulator potentiometer R
V2The current settings reference voltage that provides after relatively amplifying, provides transistor T
1The control base current, resistance R
4With potentiometer R
V3Be the sample circuit of battery charging voltage, supply with comparator U
1Reverse input end voltage is by potentiometer R
V1Battery charge restriction reference voltage is provided, supplies with comparator U
1Input terminal voltage in the same way, comparator U
1With this two voltage ratio, comparator overturns the J of often making war when two pole tensions of battery reach deboost between the two poles of the earth
1With shunt resistance R
3Connect resistance R
2, R
3The open-circuit voltage values of dividing potential drop is led just in the deboost of battery two interpolars.
9. charging device according to claim 7 is characterized in that can be made into circuit element and battery core pack is fitted together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100349906A CN100392943C (en) | 2006-04-11 | 2006-04-11 | Quick charge method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100349906A CN100392943C (en) | 2006-04-11 | 2006-04-11 | Quick charge method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1845418A true CN1845418A (en) | 2006-10-11 |
| CN100392943C CN100392943C (en) | 2008-06-04 |
Family
ID=37064338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100349906A Ceased CN100392943C (en) | 2006-04-11 | 2006-04-11 | Quick charge method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100392943C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010034179A1 (en) * | 2008-09-28 | 2010-04-01 | 广州丰江电池新技术有限公司 | Quick charge method |
| CN101471461B (en) * | 2007-12-27 | 2012-04-18 | 环鸿科技股份有限公司 | Charging method and charger |
| CN102138269B (en) * | 2008-10-15 | 2013-08-28 | 三菱重工业株式会社 | Secondary cell control system |
| CN104701918A (en) * | 2013-12-10 | 2015-06-10 | 南京德朔实业有限公司 | Charging combination and control method thereof |
| WO2015106613A1 (en) * | 2014-01-17 | 2015-07-23 | Mediatek Inc. | Method and apparatus for adjusting voltage threshold for battery by measuring internal resistance of battery, and corresponding method and sensor circuit for measuring internal resistance of battery |
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| CN107005075A (en) * | 2015-08-28 | 2017-08-01 | 华为技术有限公司 | Charging method and electronic equipment |
| CN107204493A (en) * | 2017-04-28 | 2017-09-26 | 宁德时代新能源科技股份有限公司 | Battery charging method, device and equipment |
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| CN107452999A (en) * | 2015-12-31 | 2017-12-08 | 广州丰江电池新技术股份有限公司 | Amendment makes up the lithium ion battery fast charge method of voltage |
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| JP3430264B2 (en) * | 1992-06-23 | 2003-07-28 | ソニー株式会社 | Charging device |
| JP3823503B2 (en) * | 1997-09-12 | 2006-09-20 | 宇部興産株式会社 | Secondary battery charging control method and charging device therefor |
| CN1725598A (en) * | 2005-04-07 | 2006-01-25 | 崧顺电子（深圳）有限公司 | Battery charging method and device |
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| CN102138269B (en) * | 2008-10-15 | 2013-08-28 | 三菱重工业株式会社 | Secondary cell control system |
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| WO2020047809A1 (en) * | 2018-09-06 | 2020-03-12 | Oppo广东移动通信有限公司 | Charging method, terminal, and computer storage medium |
| US11201490B2 (en) | 2018-09-06 | 2021-12-14 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Charging method, terminal, and non-transitory computer readable storage medium |
| CN110383618A (en) * | 2018-09-12 | 2019-10-25 | Oppo广东移动通信有限公司 | Charge management circuit, terminal and charging method |
| US11381102B2 (en) | 2018-09-12 | 2022-07-05 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Charging management circuit, terminal and charging method |
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