CN101128955B - Apparatus and method for charging secondary battery - Google Patents
Apparatus and method for charging secondary battery Download PDFInfo
- Publication number
- CN101128955B CN101128955B CN2006800062552A CN200680006255A CN101128955B CN 101128955 B CN101128955 B CN 101128955B CN 2006800062552 A CN2006800062552 A CN 2006800062552A CN 200680006255 A CN200680006255 A CN 200680006255A CN 101128955 B CN101128955 B CN 101128955B
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- China
- Prior art keywords
- voltage
- secondary cell
- switching device
- rechargeable battery
- lithium rechargeable
- 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.)
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- 238000007600 charging Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims description 9
- 229910052744 lithium Inorganic materials 0.000 claims description 60
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 59
- 230000000087 stabilizing effect Effects 0.000 claims description 38
- 238000010586 diagram Methods 0.000 description 5
- 239000006182 cathode active material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000006183 anode active material Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 150000002641 lithium Chemical class 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/86—Types of semiconductor device ; Multistep manufacturing processes therefor controllable only by variation of the electric current supplied, or only the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched
- H01L29/861—Diodes
- H01L29/866—Zener diodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/13—Discrete devices, e.g. 3 terminal devices
- H01L2924/1301—Thyristor
- H01L2924/13034—Silicon Controlled Rectifier [SCR]
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Protection Of Static Devices (AREA)
Abstract
The present invention relates to an apparatus for protecting a secondary battery by preventing overcharge of the secondary battery. The apparatus for protecting a secondary battery includes: a secondary battery; a power supply, connected with both electrode terminals of the secondary battery, for providing a charging voltage and a charging current to the secondary battery to charge the secondary battery; and a secondary battery protection unit for shorting the power supply thereby to stop charging the secondary battery if a charging voltage of the secondary battery is above a predetermined voltage.
Description
Technical field
The invention relates to a kind of charging device and method of secondary cell, refer to that especially a kind of secondary cell of protecting avoids overcharging and the device and method that damages.
Background technology
Generally speaking, battery is classified into chemical cell or physical battery at large, and chemical cell may be divided into primary cell, secondary cell and fuel cell.With regard to secondary cell, it includes NI-G secondary cell, nickel-hydrogen secondary cell, SLA (sealing-type lead-acid) secondary cell, lithium rechargeable battery, lighium polymer secondary battery and can heavily cover alkaline secondary cell of use etc.
Particularly, when the lithium rechargeable battery charging surpasses predetermined voltage, then can produce negative reaction between cathode active material and electrolyte, and when this electrolyte produced oxidation reaction, then negative reaction can be destroyed the structure of cathode active material.At this moment, lithium then can be deposited on the anode active material.If even voltage still continues to be sent to this secondary cell when this secondary cell has overcharged, then this secondary cell might produce accidental ignition or blast.
Generally speaking, overcharge, TS (temperature-adjusting device) is connected between the power supply and lithium rechargeable battery of supply charge power supply for avoiding lithium rechargeable battery.If the temperature of this lithium rechargeable battery causes the temperature rising and surpasses particular temperature value because of overcharging, then temperature-adjusting device can cut out and then stop to carry out charging immediately.
With regard to prior art, lithium rechargeable battery can cause the execution that temperature is too high and then interruption is charged because of overcharging, therefore, even lithium rechargeable battery charging fully, but overcharged as long as lithium rechargeable battery does not have, then lithium rechargeable battery does not still interrupt charging.Therefore, the Acceptable life of lithium ion secondary electronics then can shorten.
In addition, with regard to prior art, whether lithium rechargeable battery overcharges the height that depends on temperature.Therefore, as the hot environment of torrid areas or as the low temperature environment of polar region etc., then be difficult to decide whether overcharging of lithium rechargeable battery with temperature.Therefore, with this understanding, then be difficult to protect lithium rechargeable battery.
Therefore, industry need a kind of no matter arround temperature environment why, can both protect secondary cell to avoid overcharging, and finish when lithium rechargeable battery has overcharged or charged, then can stop the technology of charging automatically.
Summary of the invention
Therefore, the present invention then is used to solve above-mentioned prior art problems.The purpose of this invention is to provide the device and method of protecting lithium rechargeable battery, when the lithium rechargeable battery charging finishes or overcharges, can stop automatically lithium rechargeable battery is charged.
In addition, another object of the present invention provides the device and method of protection lithium rechargeable battery, preventing overcharging of lithium rechargeable battery under all temps environment.
According to an aspect of of the present present invention, the protective device of the secondary cell that is proposed comprises: secondary cell; Power supply is connected to two electrode tips of secondary cell simultaneously, provides charging voltage and charging current so that secondary cell is charged; And the protecting secondary battery unit, when secondary cell charged to predetermined voltage, two electrode tips of the power supply of short circuit simultaneously were to stop secondary cell charge.
In said apparatus, above-mentioned protecting secondary battery unit comprises: switching device, be coupled to two electrode tips of secondary cell, and if when applying Control current, be used for being connected to simultaneously two electrode tips of secondary cell; And voltage stabilizing didoe, if the charging voltage of secondary cell is higher than predetermined voltage, then provide Control current to switching device.
Above-mentioned protecting secondary battery unit also can comprise: switching device, be coupled to two electrode tips of secondary cell, and if apply Control current, can be connected to two electrode tips of secondary cell simultaneously; And piezo-resistance, if the charging voltage of secondary cell is higher than specific voltage, then provide Control current to switching device.
According to another aspect of the present invention, the protective device of the secondary cell that is proposed comprises: switching device, be coupled to two electrode tips of secondary cell, and if when applying Control current, can be connected to two electrode tips of secondary cell simultaneously; And constant-voltage equipment, if the charging voltage of secondary cell surpasses predetermined voltage, it provides Control current to switching device.
In said apparatus, above-mentioned constant-voltage equipment can be voltage stabilizing didoe or piezo-resistance.
According to another aspect of the present invention, a kind of guard method of secondary cell is proposed, it may further comprise the steps: to secondary cell charge; If the charging voltage of secondary cell surpasses predetermined voltage, then the conducting constant-voltage equipment is so that Control current flows into switching device;
When if Control current is applied to switching device, then this switching device of conducting is to stop the charging to secondary cell.
Description of drawings
Reach detailed description with reference to the following drawings, can make above-mentioned and other purposes of the present invention, feature and a bit clearer, wherein:
Fig. 1 is the circuit diagram of the apparatus for protection of secondary battery of first embodiment of the invention.
Fig. 2 and Fig. 3 are presented at the circuit diagram that electric current flows in the apparatus for protection of secondary battery shown in Figure 1.
Fig. 4 is the circuit diagram according to the apparatus for protection of secondary battery of second embodiment of the invention.
Fig. 5 and Fig. 6 are the circuit diagrams that electric current flows in apparatus for protection of secondary battery shown in Figure 4.
Fig. 7 is the operational flowchart according to the apparatus for protection of secondary battery of second embodiment of the invention.
Embodiment
Fig. 1 is the circuit diagram according to the apparatus for protection of secondary battery of first embodiment of the invention.
Lithium rechargeable battery 102 is charged by the charging voltage that power supply 100 is provided.
Protecting secondary battery unit 104 is connected in parallel to lithium rechargeable battery 102, and this protecting secondary battery unit 104 comprises the voltage stabilizing didoe 106 as constant-voltage equipment, and as the transistor 108 of switching device.Voltage stabilizing didoe 106 is connected between the base stage of the negative electrode of lithium rechargeable battery 102 and transistor 108.The emitter terminal of transistor 108 and collector terminal are connected respectively to the negative electrode and the anode of lithium rechargeable battery 102.
Be added on voltage stabilizing didoe 106 if be not less than the voltage of puncture voltage, then voltage stabilizing didoe 106 can allow electric current pass through, and this promptly is so-called zener effect.Therefore, when having charged, lithium rechargeable battery 102 finishes or when overcharging, in order to allow the electric current voltage stabilizing didoe 106 of flowing through, selection has and the complete voltage stabilizing didoe 106 of charging voltage or the corresponding puncture voltage of overcharged voltage, maybe the bleeder circuit that includes resistor etc. can be added into voltage stabilizing didoe 106.
As shown in Figure 1,, can allow the device that electric current flows, also can use piezo-resistance except that voltage stabilizing didoe 106 can be used to be used as although when lithium rechargeable battery 102 charging finishes or overcharges.
In addition, in Fig. 1,, also can select various transistor for use, conducting when this transistor is applied to its base terminal at electric current although use PNP transistor 108 as switching device.For example, it will be understood by those skilled in the art that and also can select for use NPN transistor or FET and PNP transistor as the transistor shown in Fig. 1 108.
Below, will operation according to the apparatus for protection of secondary battery of first embodiment of the invention be described with reference to figure 2 and Fig. 3.
If lithium rechargeable battery 102 begins to charge by the charging current I3 of reality, and equal to charge fully or during overcharged voltage, then voltage stabilizing didoe 106 can allow Control current to flow as Control current, and the base terminal of this Control current inflow transistor 108 subsequently.If the base terminal of Control current inflow transistor 108, then transistor 108 conductings and the then electrode tip of the power supply of short circuit simultaneously 100.Therefore, charging current does not provide to lithium rechargeable battery 102.
As mentioned above; include the protecting secondary battery unit 104 of voltage stabilizing didoe or piezo-resistance and transistorized simple structure by use; the first embodiment of the present invention can stop to carry out the action of charging automatically when the lithium rechargeable battery charging finishes or overcharges.
In addition since the decision lithium rechargeable battery whether to overcharge be to depend on charging voltage, though therefore can arround temperature environment any, can prevent that all lithium rechargeable battery from overcharging.
Below with reference to the apparatus for protection of secondary battery of Fig. 4 description according to second embodiment of the invention.
Lithium rechargeable battery can charge by the charging voltage that power supply 200 is provided.
Protecting secondary battery unit 204 is connected in parallel to lithium rechargeable battery 202.This protecting secondary battery unit 204 comprises the voltage stabilizing didoe 206 as constant-voltage equipment, and as the SCR (thyristor) 208 of switching device.Voltage stabilizing didoe 206 is connected the gate terminal of the negative electrode and the SCR208 of lithium rechargeable battery 202.The emitter terminal of SCR208 and collector terminal are connected to the negative electrode and the anode of lithium rechargeable battery 202 respectively.
If when being not less than the voltage of puncture voltage and being added on voltage stabilizing didoe 206, then voltage stabilizing didoe 206 can allow electric current pass through, this promptly is so-called zener effect.Therefore, when having charged, lithium rechargeable battery 202 finishes or when overcharging, in order to allow the electric current voltage stabilizing didoe 206 of flowing through, selection has and the charging or the voltage stabilizing didoe 206 of the corresponding puncture voltage of overcharged voltage fully, and the bleeder circuit that maybe will include resistor etc. is added into voltage stabilizing didoe 206.
As shown in Figure 4, when lithium rechargeable battery 202 chargings finished or overcharge, although can use voltage stabilizing didoe 206 as the device that can allow electric current flow through, piezo-resistance also may be utilized.
In addition, in Fig. 4,, also can select various switching device for use, in described switching device conducting when its gate terminal applies electric current although use SCR208 as switching device.For example, in the present embodiment, it will be understood by those skilled in the art that and also can select N type SCR for use, bigrid SCR, TRIAC, and GTO (gate electrode capable of switching off) SCR etc. is as switching device.
Below with reference to Fig. 5 and Fig. 6 operation according to the apparatus for protection of secondary battery of second embodiment of the invention is described.
If lithium rechargeable battery 202 begins to charge by actual current 16, and reached fully charging or when overcharged, then voltage stabilizing didoe 206 can allow to flow as the electric current of Control current, and this Control current flows into the gate terminal of SCR208.If Control current flows into the gate terminal of SCR208, then SCR208 conducting, and the then electrode tip of the power supply of short circuit simultaneously 200.Therefore, charging current does not input to lithium rechargeable battery.
Fig. 7 is the flow chart of operation of the apparatus for protection of secondary battery of second embodiment of the invention.
If the charging voltage of lithium rechargeable battery 202 equals the puncture voltage (S102) of voltage stabilizing didoe 206, then voltage stabilizing didoe 206 conductings (S103).Therefore, 206 of voltage stabilizing didoes can allow Control current to flow into the gate terminal of SCR208.
If Control current is applied to the gate terminal of SCR208, then SCR208 conducting (S104).Then, two of power supply 200 electrodes then can be by short circuit (S105).
Therefore, the charging of lithium rechargeable battery 208 action then can be interrupted.
As mentioned above; include the protecting secondary battery unit 204 of voltage stabilizing didoe or simple structures such as piezo-resistance and SCR by use; when the lithium rechargeable battery charging finished or overcharges, the second embodiment of the present invention can stop to carry out the action of charging automatically.
In addition because whether the decision lithium rechargeable battery overcharge and depend on its charging voltage, though therefore can arround temperature environment how, and all can avoid lithium rechargeable battery to overcharge effectively.
The foregoing description only is to give an example for convenience of description, and the interest field that the present invention advocated should be as the criterion so that claim is described certainly, but not only limits to the foregoing description.
Claims (6)
1. device of protecting lithium rechargeable battery comprises:
Power supply is connected with two electrode tips of described secondary cell, is used for providing charging voltage and charging current so that described secondary cell is charged to described secondary cell; And
The protecting secondary battery unit is connected in parallel to described lithium rechargeable battery, and if were used for that the charging voltage of described secondary cell is higher than predetermined voltage two electrode tip of the described power supply of short circuit stopping to described secondary cell charge,
Wherein, described protecting secondary battery unit comprises:
Switching device is coupled to two electrode tips of this secondary cell, if applied Control current, then is used for two electrode tips of this secondary cell of short circuit; And
Piezo-resistance or voltage stabilizing didoe are higher than predetermined voltage if be used for the charging voltage of this secondary cell, then provide Control current to this switching device,
Described switching device directly connects two electrode tips of this secondary cell.
2. device as claimed in claim 1, wherein:
Described switching device is NPN transistor or PNP transistor; And
Wherein, described voltage stabilizing didoe is connected between the negative electrode and described NPN or the transistorized base terminal of PNP of described lithium rechargeable battery, and
Wherein, select to have the voltage stabilizing didoe with the complete charging voltage or the corresponding puncture voltage of overcharged voltage of described lithium rechargeable battery, or bleeder circuit is added into described voltage stabilizing didoe.
3. device as claimed in claim 1, wherein, this switching device is a thyristor.
4. device as claimed in claim 3, wherein, described thyristor is one of following array apparatus: N type thyristor, bigrid thyristor, TRIAC, and gate electrode capable of switching off thyristor.
5. method of protecting lithium rechargeable battery, it may further comprise the steps:
Utilize two power supplys that electrode tip is connected with described secondary cell, to this secondary cell charge;
To be connected in parallel to described lithium rechargeable battery by the protecting secondary battery unit that switching device and constant-voltage equipment are formed, described constant-voltage equipment is piezo-resistance or voltage stabilizing didoe, if the charging voltage of this secondary cell is higher than predetermined voltage, then described piezo-resistance of conducting or voltage stabilizing didoe are so that Control current flows into switching device;
If this Control current is applied to this switching device, then this switching device of conducting to be stopping the charging to this secondary cell,
Wherein this switching device is a thyristor,
Described switching device directly connects two electrode tips of this secondary cell.
6. method as claimed in claim 5, wherein, described thyristor is one of following array apparatus: N type thyristor, bigrid thyristor, TRIAC, and gate electrode capable of switching off thyristor.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050016100A KR20060094715A (en) | 2005-02-25 | 2005-02-25 | Method and circuit for protecting a battery from over-charge |
| KR1020050016100 | 2005-02-25 | ||
| KR10-2005-0016100 | 2005-02-25 | ||
| KR1020050065614A KR100866712B1 (en) | 2005-07-20 | 2005-07-20 | Apparatus of stabilizating for storage battery |
| KR10-2005-0065614 | 2005-07-20 | ||
| KR1020050065614 | 2005-07-20 | ||
| PCT/KR2006/000644 WO2006091036A1 (en) | 2005-02-25 | 2006-02-24 | Apparatus and method for stabilizing secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101128955A CN101128955A (en) | 2008-02-20 |
| CN101128955B true CN101128955B (en) | 2011-05-11 |
Family
ID=37602452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800062552A Active CN101128955B (en) | 2005-02-25 | 2006-02-24 | Apparatus and method for charging secondary battery |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20060094715A (en) |
| CN (1) | CN101128955B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9444247B2 (en) | 2011-05-17 | 2016-09-13 | Samsung Electronics Co., Ltd. | Apparatus and method of protecting power receiver of wireless power transmission system |
| KR20160080800A (en) | 2014-12-30 | 2016-07-08 | 에이치엘그린파워 주식회사 | Pressure sensitive apparatus for preventing over charging and control method thereof |
| KR102362879B1 (en) * | 2018-07-04 | 2022-02-11 | 주식회사 엘지에너지솔루션 | Method and apparatus for testing internal short of secondary battery and secondary battery used for the method |
-
2005
- 2005-02-25 KR KR1020050016100A patent/KR20060094715A/en not_active Application Discontinuation
-
2006
- 2006-02-24 CN CN2006800062552A patent/CN101128955B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101128955A (en) | 2008-02-20 |
| KR20060094715A (en) | 2006-08-30 |
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Effective date of registration: 20211125 Address after: Seoul, South Kerean Patentee after: LG Energy Solution Address before: Seoul, South Kerean Patentee before: LG CHEM, Ltd. |
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