CN101814747A - Charging circuit and charging method - Google Patents
Charging circuit and charging method Download PDFInfo
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- CN101814747A CN101814747A CN200910105614A CN200910105614A CN101814747A CN 101814747 A CN101814747 A CN 101814747A CN 200910105614 A CN200910105614 A CN 200910105614A CN 200910105614 A CN200910105614 A CN 200910105614A CN 101814747 A CN101814747 A CN 101814747A
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Abstract
The invention discloses a charging circuit and a charging method, which are used for charging lead-acid cells. The charging circuit comprises a charging management circuit, a reset signal generation module and a reset circuit; the reset signal generation module is used for detecting the state of a rechargeable cell connected with the charging management circuit and generating a reset signal, and the reset circuit is connected in series between the charging management circuit and an input voltage, and is used for receiving the reset signal and controlling the charging management circuit to switch off and reset. When detecting the rechargeable cell connected with the charging management circuit by way of hot swap, the reset signal generation module generates a reset signal to switch off and reset the charging management circuit. The charging circuit and the charging method can ensure that the lead-acid cell can be completely charged without switching off a system when the cell is plugged and unplugged, thus realizing hot swap in the process of charging the lead-acid cell.
Description
Technical field
The present invention relates to the battery boosting technology field, relate in particular to a kind of charging method of supporting the charging circuit of hot plug and supporting hot plug.
Background technology
Most of lead-acid batteries are when charging, can experience process as shown in Figure 1: constant current charge (the SABCD section among Fig. 1), constant voltage charge (the DEF section among Fig. 1), and the floating charge stage (the FGH section among Fig. 1), lead-acid battery will stay in the GH stage of floating charge after charging finishes.For general plumbic acid charger, complete charging process all can experience the SABCDEFGH stage, but finishes or after battery charge finishes to extract, charger will be in the GH section when battery charge.The charger of this moment considered to be in the floating charge state, unless charger re-powers, otherwise charger can be in this floating charge state always.At this moment, if insert the battery that a voltage is in the float charge voltage scope just, charger can think that this battery has been full of electricity, and is positioned at the floating charge stage.This will cause when charger powers on earlier, and the plumbic acid charger can run to a kind of floating charge state immediately, as long as charger does not cut off the power supply, the plumbic acid charger can keep this state always.If after inserting a charging voltage this moment and surpassing the battery of float charge voltage, the plumbic acid charger also can be limited in charging voltage in the float charge voltage scope always, thereby cause the battery can't full charging, charger then still takes for battery and is filled always.The disconnected electricity once of plumbic acid charger this moment just can correctly charge.Above situation all causes charging lead-acid cells not experience constant-voltage phase, thereby can not the full charging pond, and this just is equivalent to existing plumbic acid charger and does not support hot plug.
And present application state, changing battery rather than professional by the user, to change the application places of battery more and more, and some equipment have the requirement of not cutting off the power supply, and at present application characteristic, it is more and more to make the hot plug mode change the demand of battery.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The invention provides a kind of charging circuit and charging method, when this circuit and method can make system plug battery under the situation of not cutting off the power supply lead-acid battery is charged, realize the hot plug of lead-acid battery charging process.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be:
A kind of charging circuit comprises charge management circuit, comprises that also reset signal forms module, and reset circuit;
Described reset signal forms module and is used to detect the state that rechargeable battery inserts described charge management circuit, forms reset signal;
Described reset circuit is connected between described charge management circuit and the input voltage, is used to receive described reset signal and controls described charge management circuit power-off reset.
A kind of charging method may further comprise the steps:
A, detecting rechargeable battery and whether insert charge management circuit in the hot plug mode, is execution in step B then;
B, with behind the described charge management circuit power-off reset, described rechargeable battery is charged.
Beneficial effect of the present invention is: the charging method that adopts charging circuit of the present invention and support hot plug, because after detecting rechargeable battery insertion charger, can carry out correct resetting to charge management circuit automatically, thereby begin new charge cycle, when the system that guaranteed plugs battery under the situation of not cutting off the power supply lead-acid battery is carried out complete charging process, therefore, realized the hot plug of lead-acid battery charging process.
Description of drawings
Fig. 1 is that the voltage and current of lead-acid battery when charging changes schematic diagram;
Fig. 2 supports hot plug charging circuit embodiment theory diagram for the present invention;
Fig. 3 the present invention includes the first embodiment circuit diagram that signal forms module, reset circuit and charge management circuit;
Fig. 4 obtains the plug signal schematic representation for the present invention;
Fig. 5 the present invention includes the second embodiment circuit diagram that signal forms module, reset circuit and charge management circuit;
Fig. 6 is low level reset signal schematic diagram;
Fig. 7 supports the charging method flow chart of hot plug for the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further details:
The charging circuit of the support hot plug that the present invention proposes is mainly used in charging lead-acid cells.Charging circuit comprises that charge management circuit, reset signal form module and reset circuit; Reset signal forms module and is used to detect the state that rechargeable battery inserts charge management circuit, forms reset signal, and reset circuit is connected between charge management circuit and the input voltage, is used to receive reset signal and control charge management circuit power-off reset.When reset signal formed module and detects rechargeable battery and insert charge management circuit in the hot plug mode, the output reset signal was given reset circuit, reset circuit control charge management circuit power-off reset.
One embodiment of charging circuit comprises that charge management circuit, reset signal form module and reset circuit as shown in Figure 2, and reset signal forms module and comprise battery plug detecting unit, and signal forms module.Battery plug detecting unit be used for to battery whether insertion detects, when battery inserted, battery plug detecting unit produced one and plugs the signal of telecommunication, i.e. BC signal; Signal forms module and is connected with battery plug detecting unit, is used to judge the validity of plug signal, after signal forms module affirmation hot plug effectively, provides reset signal, thereby makes reset circuit carry out complete resetting to charge management circuit.Because forming module, reset signal comprises the signal formation module that is used to judge plug signal validity, therefore can identification and exclude the interference signal, labile state when avoiding plugging battery, and avoid causing providing repeatedly the infringement that reset signal brings reset circuit because of rechargeable battery repeats to plug within the predetermined time.
In actual applications, detected light signal, mechanical signal convert the required signal of telecommunication of circuit in the time of can be by the battery hot plug, that is, utilize mechanical switch or transducer to obtain plugging the signal of telecommunication.Can set the preceding BC of battery insertion is low level, and it is high level that battery inserts back BC saltus step, and perhaps the preceding BC of BC insertion is a high level, and insertion back BC is a low level.One embodiment of battery plug detecting unit can be as shown in Figure 4, battery plug detecting unit comprises second resistance R 2 and the mechanical switch K1 that polyphone joins, the end of R2 connects an input voltage vin, one end ground connection of K switch 1, the contact A of R2 and K switch 1 is the plug electrical signal of this unit, forms module input with signal and is connected.When no battery inserts, mechanical switch K1 is in off-state, contact A is output as high level, when battery inserts, utilize the physical size of battery that K switch 1 bump is closed, contact A is output as low level, battery inserts moment, contact A has formed the plug signal of telecommunication from high level to low level variation, and when therefore having battery to insert, battery plug detecting unit can be exported the plug signal of telecommunication.
Charge management circuit, signal form module and reset circuit can adopt multiple physical circuit to realize.One embodiment of charge management circuit, signal formation module and reset circuit as shown in Figure 3.Reset circuit comprises power switch pipe Q1 and signal amplifier tube Q2; Q1 is connected between charge management circuit and the input voltage vin, is driven by signal amplifier tube Q2.Triode is used in power switch pipe Q1 and signal amplifier tube Q2 exploitation, also can adopt field effect transistor (metal-oxide-semiconductor), and power switch pipe Q1 is a metal-oxide-semiconductor in the present embodiment, and signal amplifier tube Q2 is a triode.The Q1 grid connects the collector electrode of Q2, and its source electrode connects input voltage vin, and its drain electrode links to each other with charge management circuit.And the base stage received signal of signal amplifier tube Q2 forms the reset signal of module output, its grounded emitter, power switch pipe conducting during the conducting of signal amplifier tube.The module that forms signal adopts CPU to realize, the I/O mouth of CPU connects the output of battery plug detecting unit, and another I/O mouth connects the input of reset circuit through first resistance R 1.When the stable state that no battery or battery are charging, CPU provides the signal of a normality high level, and with the signal amplifier tube Q2 that keeps reset circuit and the conducting of power switch pipe Q1, this state is a kind of stable state; CPU detects the state of BC level saltus step, when CPU detects the saltus step of BC level, after promptly detecting the plug signal of telecommunication, the plug signal of telecommunication is carried out the judgement of validity, after CPU judges that battery inserts effectively, provide a reset signal (RESET signal), this reset signal is illustrated in figure 6 as negative pulse, and the duration Treset of reset signal forms module by signal and is arranged to carry out the power-off reset time greater than charge management circuit, after reset circuit receives reset signal, charge management circuit is carried out power-off reset.Charge management circuit has carried out correct resetting, thereby has begun new charge cycle after the processing procedure that experiences power down and re-power.This is equivalent to charger is to be in not power-up state in a period of time after battery inserts, after battery inserts affirmation, the side re-powers, when the system that guaranteed plugs battery under the situation of not cutting off the power supply lead-acid battery is carried out complete charging process, therefore, realize the hot plug of lead-acid battery charging process, supported final lead-acid battery floating charge state.
In the embodiment shown in fig. 3, CPU comprises by the time-delay of the plug signal of telecommunication is gone to tremble the judgement that the plug signal of telecommunication carries out validity, reject the labile state that interference signal and rechargeable battery are not inserted into the position, also be included in the Preset Time repeatedly plug a plurality of plug signal judgment of generation and processing.For example described Preset Time is 10S, in 10S in the CPU mode of at first utilizing time-delay to go to shake to detected first plug signal of telecommunication to be confirmed to be the available heat plug, then provide reset signal immediately; And among the 10S detected repeatedly the 2nd, 3 ... though the plug signal of telecommunication utilizes time-delay to go the mode of trembling to be confirmed to be is effective plug, do not assert that but the plug signal of telecommunication is a useful signal, do not provide reset signal immediately, but when Preset Time 10S finishes, provide reset signal.Can avoid like this repeating to plug causing providing repeatedly the infringement that reset signal brings reset circuit power switch pipe Q1 at predetermined minimum period internal cause rechargeable battery.
The module that forms signal can also adopt a RC filter circuit and a monostable flipflop to realize, as shown in Figure 5, form the RC filter circuit by R3 and C3, the RC filter circuit is connected with monostable flipflop, the input of described RC filter circuit connects the output of battery plug detecting unit, the RC filter circuit is used for going to tremble to plugging signal of telecommunication time-delay, and the reset signal of duration requirement is satisfied in monostable flipflop output.The signal of being made up of RC filter circuit and monostable flipflop forms module, and its advantage is that circuit is simple, realizes easily.
The present invention also comprises a kind of charging method of supporting hot plug, its basic skills is: detect rechargeable battery and whether insert charge management circuit in the hot plug mode, be, then described charge management circuit is carried out power-off reset after, begin again described rechargeable battery is charged.
Idiographic flow comprises the steps: as shown in Figure 7
Whether S1, detect rechargeable battery and insert, be execution in step S2 then;
S2, generation plug signal;
S3, the plug signal is delayed time and trembled;
S4, the minimum period that the reset circuit trouble free service is set are Preset Time, for example 10S.Judge according to the plug signal whether rechargeable battery is that described Preset Time inserts the interior first time, is then to provide reset signal, otherwise execution in step S5;
S5, when a plurality of plug signal is arranged in described Preset Time, the described Preset Time of then delaying time provides reset signal when described Preset Time finishes.For example, in Preset Time 10S, when CPU detects battery hot plug signal once more, and under the effective situation of hot plug, do not provide reset signal immediately, but provide reset signal again after waiting for a Preset Time 10s.If CPU detects effective hot plug signal at short notice repeatedly, and the time interval is less than Preset Time 10s, then only to last plug signal output RESET signal.
After S6, reset circuit receive described reset signal, described charge management circuit is carried out power-off reset, more described rechargeable battery is charged afterwards.
Can also comprise judging whether described rechargeable battery is the step of lead-acid battery in the above flow process, this step judged result if yes and other results that validity is judged also for being then to provide reset signal.Whether for example add between step S3 and S4 rechargeable battery is the determining step of lead-acid battery, this step judged result if yes and rechargeable battery be to insert for the first time in the Preset Time, then provide reset signal.
Adopt the charging method of charging circuit of the present invention and support hot plug, because after detecting rechargeable battery insertion charger, can carry out correct resetting to charge management circuit automatically, thereby begin new charge cycle, therefore, in the time of can making system under the situation of not cutting off the power supply, plug battery lead-acid battery is charged, realized the hot plug of lead-acid battery charging process.
Be understandable that, for those of ordinary skills, can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the present invention.
Claims (13)
1. a charging circuit comprises charge management circuit, it is characterized in that: comprise that also reset signal forms module, and reset circuit;
Described reset signal forms module and is used to detect the state that rechargeable battery inserts described charge management circuit, forms reset signal;
Described reset circuit is connected between described charge management circuit and the input voltage, is used to receive described reset signal and controls described charge management circuit power-off reset.
2. charging circuit according to claim 1 is characterized in that: described reset signal forms module and comprises battery plug detecting unit, and signal forms module; Described battery plug detecting unit is used for producing the plug signal of telecommunication when battery inserts, described signal forms module and is connected with described battery plug detecting unit, is used for the validity of the described plug signal of telecommunication is judged, provides described reset signal.
3. charging circuit according to claim 1 is characterized in that: described reset circuit comprises power switch pipe and signal amplifier tube; Described power switch pipe is connected between described charge management circuit and the input voltage, is driven by described signal amplifier tube; The base stage of described signal amplifier tube receives described reset signal, its grounded emitter, and its collector electrode connects described power switch pipe, described power switch pipe conducting during described signal amplifier tube conducting.
4. charging circuit according to claim 3 is characterized in that: described power switch pipe is a metal-oxide-semiconductor, and its grid connects the collector electrode of described signal amplifier tube, and its source electrode connects input voltage, and its drain electrode links to each other with described charge management circuit.
5. charging circuit according to claim 2, it is characterized in that: described battery plug detecting unit comprises second resistance and the mechanical switch of serial connection, one end of described second resistance connects input voltage, one end ground connection of described mechanical switch, described second resistance form module input with the contact of mechanical switch with described signal and are connected.
6. charging circuit according to claim 2 is characterized in that: described signal forms module and comprises CPU, and described CPU comprises an I/O mouth and the 2nd I/O mouth; Described charging circuit also comprises first resistance, and a described I/O mouth connects the output of described battery plug detecting unit, and described the 2nd I/O mouth connects the input of described reset circuit through described first resistance.
7. charging circuit according to claim 2 is characterized in that: described signal forms module and comprises a RC filter circuit and a monostable flipflop, the two series connection; The input of described RC filter circuit connects the output of described battery plug detecting unit, and described monostable flipflop is exported described reset signal.
8. according to the described charging circuit of the arbitrary claim of claim 1 to 7, it is characterized in that: the duration of described reset signal carries out the time of power-off reset greater than described charge management circuit.
9. a charging method is characterized in that, may further comprise the steps:
Whether A, detection rechargeable battery insert charge management circuit in the hot plug mode, are then to hold
Row step B;
B, with behind the described charge management circuit power-off reset, described rechargeable battery is charged.
10. charging method according to claim 9 is characterized in that: described steps A comprises the steps:
Whether A1, detection rechargeable battery insert, and are then to produce the plug signal;
A2, to the plug signal validity judge, provide reset signal.
11. charging method according to claim 10 is characterized in that: described steps A 2 comprises following processing:
A21, described plug signal delayed time tremble;
A22, foundation plug signal judge whether described rechargeable battery is that Preset Time inserts the interior first time, is then to provide reset signal, otherwise execution in step A23;
A23, when in described Preset Time, plugging signal in addition, then when finishing, described Preset Time provides reset signal.
12. according to claim 10 or 11 described charging methods, it is characterized in that: described step B comprises following processing: after reset circuit receives described reset signal, charge management circuit is carried out power-off reset.
13. charging method according to claim 12, it is characterized in that: also comprise judging whether described rechargeable battery is the step of lead-acid battery in the described steps A 2, this step judged result if yes and also other results that validity is judged also for being then to provide reset signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910105614.5A CN101814747B (en) | 2009-02-19 | 2009-02-19 | Charging circuit and charging method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910105614.5A CN101814747B (en) | 2009-02-19 | 2009-02-19 | Charging circuit and charging method |
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| CN101814747A true CN101814747A (en) | 2010-08-25 |
| CN101814747B CN101814747B (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910105614.5A Active CN101814747B (en) | 2009-02-19 | 2009-02-19 | Charging circuit and charging method |
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Cited By (3)
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| CN107994626A (en) * | 2016-10-26 | 2018-05-04 | 株式会社牧田 | battery pack and charging system |
| CN108073260A (en) * | 2017-04-07 | 2018-05-25 | 丁贤根 | A kind of method and system for overcharging reset |
| CN108944478A (en) * | 2017-05-17 | 2018-12-07 | 宝沃汽车（中国）有限公司 | Charge control method, device and the electric car of electric car |
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| CN1267927A (en) * | 1999-03-18 | 2000-09-27 | 富士通株式会社 | Protection method, control circuit and battery apparatus |
| CN1992466A (en) * | 2005-12-30 | 2007-07-04 | 中兴通讯股份有限公司 | Charging controlling means realizing battery precharge without sampling and system thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994626A (en) * | 2016-10-26 | 2018-05-04 | 株式会社牧田 | battery pack and charging system |
| CN108073260A (en) * | 2017-04-07 | 2018-05-25 | 丁贤根 | A kind of method and system for overcharging reset |
| CN108944478A (en) * | 2017-05-17 | 2018-12-07 | 宝沃汽车（中国）有限公司 | Charge control method, device and the electric car of electric car |
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| CN101814747B (en) | 2014-05-07 |
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Effective date of registration: 20180806 Address after: 518057 the 1-4 floor of MINDRAY building, science and technology south twelve Road, Nanshan District high tech Industrial Park, Shenzhen, Guangdong. Co-patentee after: SHENZHEN MINDRAY SCIENTIFIC Co.,Ltd. Patentee after: SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS Co.,Ltd. Address before: 518057 MINDRAY science and technology south twelve road MINDRAY high tech Industrial Park, Shenzhen, Guangdong Patentee before: SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS Co.,Ltd. |
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Application publication date: 20100825 Assignee: Shenzhen Mindray Animal Medical Technology Co.,Ltd. Assignor: SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS Co.,Ltd. Contract record no.: X2022440020009 Denomination of invention: A charging circuit and charging method Granted publication date: 20140507 License type: Common License Record date: 20220804 |
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