CN101373903B - Charging control circuit for charging battery - Google Patents
Charging control circuit for charging battery Download PDFInfo
- Publication number
- CN101373903B CN101373903B CN2008100635786A CN200810063578A CN101373903B CN 101373903 B CN101373903 B CN 101373903B CN 2008100635786 A CN2008100635786 A CN 2008100635786A CN 200810063578 A CN200810063578 A CN 200810063578A CN 101373903 B CN101373903 B CN 101373903B
- Authority
- CN
- China
- Prior art keywords
- resistance
- battery
- diode
- comparator
- recharged
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The invention relates to a charge control circuit of a rechargeable battery, which comprises a charger, a first diode, a first resistor and a second resistor, wherein, the first resistor and the second resistor are connected with two ends of the battery which is charged after being connected in series, and a cathode of the battery which is charged is earthed. The charge control circuit is characterized in that a third resistor is also in series connected between the first resistor and the second resistor; one path of an anode of the first diode is connected with the anode of the battery which is charged through the first resistor, and the other path thereof is connected with a negative input end of a comparator; one path of the cathode of the first diode is earthed through a capacitor, and the other path thereof is connected with a positive input end of the comparator; the negative input end of the comparator is connected with the cathode of the battery which is charged through the second resistor; an output end of the comparator is connected with a control end of the charger. The charge control circuit increases the sensitivity of the comparator by utilizing the small dynamic resistance of the diode and the dynamic partial pressure ratio characteristic of the resistor, rapidly detects and controls the micro-voltage negative increment thereof that is minus Delta V, prevents the over-charging phenomenon of the battery which is charged, and enables the circuit to possess good practicability.
Description
Technical field
The present invention relates to a kind of charging control circuit of rechargeable battery, particularly relate to a kind of charging control circuit whether NI-G or Ni-MH battery are full of electricity that detects.
Background technology
It had a significant characteristic when NI-G or nickel-hydrogen secondary cell were charged: voltage raises with the increase of store electrical energy, and when battery was full of electricity, charging voltage had a fast rise and reaches maximum; Behind the full electricity, accept charging again, cell voltage can begin to descend slightly from the ceiling voltage point, negative increment of voltage-Δ V occurs.Can this small voltage negative increment-Δ V be measured (negative increment of voltage method) by proper circuit, finish charging work with the break-make of control charging current.
As shown in Figure 1, realize the circuit theory diagrams of charging control of nickel for available technology adopting negative increment of voltage method, it includes charger, be recharged battery DC ' and the output that are connected the charger positive and negative end are connected comparator BG ' on the charger control end, wherein, the positive pole one tunnel that is recharged battery DC ' through first resistance R 1 ' after connect the negative input end in1 ' of comparator BG ', another road is through second resistance R 2 ' back ground connection, and, the negative electrode of diode D ' be connected first resistance R 1 ' and second resistance R 2 ' contact P ' on, the anode of this diode D ' connects the positive input terminal in2 ' of comparator BG ', the positive input terminal in2 ' of comparator BG ' is again through one capacitor C ' ground connection, and the output of comparator BG ' is connected on the control end CTR ' of charger.During charging, because there is pressure drop in diode D ', the comparator BG ' negative input end in1 ' current potential of this control circuit is higher than positive input terminal in2 ' current potential all the time, and comparator BG ' is by being failure to actuate the charger operate as normal; When being recharged battery DC ' when being full of electricity; battery DC ' terminal voltage can descend; the negative input end current potential of comparator BG ' descends simultaneously; because the effect that oppositely ends of diode D ', the positive input terminal in2 ' discharge of comparator BG ' is very slow, so; in case positive input terminal in2 ' current potential of comparator BG ' is higher than negative input end in1 ' current potential; comparator BG ' conducting is given charger control end CTR ' by output out ' generation triggering signal, and charger stops to charge the battery.
Above-mentioned control circuit is to utilize comparator BG ' to detect the negative increment of voltage-Δ V of rechargeable battery when being full of electricity, according to foregoing circuit, because there are (several volts at about zero point) in the pressure drop of diode D ', under the situation that the current potential of comparator BG ' positive input terminal remains unchanged, the drop-out value of cell voltage must be greater than the voltage drop value of diode D ', just meeting conducting of comparator BG ', output signal.And nickel-cadmium cell or Ni-MH battery are because the electric energy of charger has become heat energy being full of electricity back terminal voltage decline (producing negative increment of voltage-Δ V), make what the battery heating caused.Temperature rise is big more, and the negative increment of voltage of battery-Δ V is also big more.After measured, NI-G or Ni-MH battery when being full of electricity, 1 ℃ of the every rising of temperature rise, the terminal voltage 4mv that descends approximately, suppose that this moment, the pressure drop of diode D ' was that 0.3V (is that the pressure drop of battery two ends will reach more than the 0.3V, the conducting of comparator BG '), then the temperature rise of battery must surpass 75 ℃, adds the ambient temperature (as 30 ℃) of this moment, then battery temperature will be up to more than 100 ℃, obviously, at this moment battery damages already, even explosion.Therefore, above-mentioned control circuit connected mode causes over-charging of battery easily, and comparator BG ' reaction sensitivity is not high, can't use in practice, has certain limitation, awaits further improvement.
Summary of the invention
Technical problem to be solved by this invention is the charging control circuit that a kind of rechargeable battery that can effectively increase the comparator reaction sensitivity and prevent to overcharge is provided at above-mentioned prior art present situation, and this charging control circuit can be full of the rapid detection that realizes negative increment of voltage-Δ V in electricity back at nickel-cadmium/nickel-hydrogen cell.
The present invention solves the problems of the technologies described above first technical scheme that can adopt: the charging control circuit of this rechargeable battery, it comprises the have control end charger of (CTR), be recharged battery (DC) and battery and be full of the electrical measurement circuit, wherein, it is core with comparator (BG) that described battery is full of the electrical measurement circuit, comprise first resistance (R1), second resistance (R2), first diode (D1) and electric capacity (C), be attempted by after first resistance (R1), second resistance (R2) series connection and be recharged battery (DC) two ends, be recharged the minus earth of battery (DC);
It is characterized in that: also be connected in series one the 3rd resistance (R3) between described first resistance (R1) and second resistance (R2), the anode one tunnel of described first diode (D1) connects the positive pole that is recharged battery (DC) through first resistance (R1), another Lu Jingdi three resistance (R3) insert the negative input end (in1) of comparator (BG), the negative electrode one tunnel of described first diode (D1) is through electric capacity (C) and ground connection, and the positive input terminal (in2) of described comparator (BG) is inserted on another road; The negative input end (in1) of described comparator (BG) connects the negative pole that is recharged battery (DC) through described second resistance (R2), the output (out) of described comparator (BG) then inserts the control end (CTR) of described charger, and, the resistance of described the 3rd resistance (R3) meets the following conditions: regulate the resistance of the 3rd resistance (R3), make described the 3rd resistance (R3) pressure drop less than and near the pressure drop of described first diode (D1).
Described the 3rd resistance (R3) is variable resistor, by adjusting the resistance of the 3rd resistance (R3), make it the pressure drop of pressure drop near first diode (D1), be full of when producing negative voltage increment-Δ V at battery, can reduce the potential difference between the positive-negative input end of comparator (BG), comparator (BG) conducting and send signal rapidly, the sensitivity that improves comparator (BG).
The present invention solves the problems of the technologies described above also can adopt following technical scheme: the charging control circuit of this rechargeable battery, it comprises the have control end charger of (CTR), be recharged battery (DC) and battery and be full of the electrical measurement circuit, wherein, it is core with comparator (BG) that described battery is full of the electrical measurement circuit, comprise first resistance (R1), second resistance (R2), first diode (D1) and electric capacity (C), be attempted by after first resistance (R1), second resistance (R2) series connection and be recharged battery (DC) two ends, be recharged the minus earth of battery (DC);
It is characterized in that: also include second diode (D2), the 4th resistance (R4) and the 5th resistance (R5), described second diode (D2) is serially connected between first resistance (R1) and second resistance (R2), be connected in parallel on second diode (D2) two ends after described the 4th resistance (R4) and the 5th resistance (R5) serial connection, wherein, the negative electrode one tunnel of described first diode (D1) is through electric capacity (C) and ground connection, and the positive input terminal (in2) of described comparator (BG) is inserted on another road; The anode one tunnel of described second diode (D2) connects the positive pole that is recharged battery (DC) through first resistance (R1), and another Lu Jingdi four resistance (R4) connect first diode (D1) anode; The negative electrode one tunnel of described second diode (D2) connects the anode of first diode (D1) through the 5th resistance (R5), and another road connects the negative input end (in1) of comparator (BG); The negative input end (in1) of described comparator (BG) connects the negative pole that is recharged battery (DC) through second resistance (R2) again, the output (out) of described comparator (BG) then inserts the control end (CTR) of described charger, and, the resistance of described the 4th resistance (R4) and the 5th resistance (R5) meets the following conditions: regulate the voltage ratio of described the 4th resistance (R4) and the 5th resistance (R5), make described the 5th resistance (R5) pressure drop less than and near the pressure drop of described first diode (D1).
Described the 4th resistance (R4) or the 5th resistance (R5) also are variable resistors, can adjust the voltage ratio of the 4th resistance (R4) and the 5th resistance (R5), reduce the potential difference between comparator (BG) positive-negative input end, thereby regulate the sensitivity of comparator (BG), make the The whole control circuit be in optimum state.
Compared with prior art, the invention has the advantages that: when NI-G or nickel-hydrogen secondary cell are charged, utilize the sensitivity that dynamic electric resistor is little and dynamic voltage ratio characteristic resistance itself has improved comparator of diode dexterously, its small voltage negative increment-Δ V can be detected and control fast, prevented to be recharged the phenomenon that overcharges of battery, made the present invention possess good practicability.
Description of drawings
Fig. 1 is the charging control circuit schematic diagram of prior art.
Fig. 2 is the circuit theory schematic diagram of the embodiment of the invention one.
Fig. 3 is the circuit theory schematic diagram of the embodiment of the invention two.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Embodiment one: as shown in Figure 2, the charging control circuit of rechargeable battery, it comprises the charger with control end CTR, is recharged battery DC and battery and is full of the electrical measurement circuit; Wherein, it is core with comparator BG that described battery is full of the electrical measurement circuit, comprise first resistance R 1, second resistance R 2, first diode D1 and the capacitor C, be attempted by after first resistance R 1,2 series connection of second resistance R and be recharged battery DC two ends, be recharged the minus earth of battery DC.
Also be connected in series one the 3rd resistance R 3 between described first resistance R 1 and second resistance R 2, the anode one tunnel of the described first diode D1 connects the positive pole that is recharged battery DC through first resistance R 1, another Lu Jingdi three resistance R 3 insert the negative input end in1 of comparator BG, the negative electrode one tunnel of the described first diode D1 is through capacitor C and ground connection, and the positive input terminal in2 of described comparator BG is inserted on another road; The negative input end in1 of described comparator BG connects the negative pole that is recharged battery DC through described second resistance R 2, and the output out of described comparator BG then inserts the control end CTR of described charger.
In the present embodiment, by adjusting the resistance of the 3rd resistance R 3, make the pressure drop of the 3rd resistance R 3 try one's best near the pressure drop of the first diode D1, but again less than the pressure drop of the first diode D1, like this in the charging stage, the current potential of BG negative input end in1 is higher than the current potential of comparator BG positive input terminal in2, and comparator BG ends;
When battery DC was full of electricity, charging voltage began to descend after reaching the top, and this moment, comparator BG negative input end in1 current potential began to descend; Because the first diode D1 is in the negative bias state; oppositely end; therefore decrease speed is very slow; the current potential of comparator BG positive input terminal in2 remains unchanged substantially; the result makes the positive input terminal in2 current potential of comparator BG be higher than negative input end in1 and conducting; comparator BG feeds back to the control end CTR of charger in output out output control signal, makes charger change operating state and stops battery charge.
Because the effect of the 3rd resistance R 3, when rechargeable battery DC two ends produce negative increment of voltage-Δ V, potential difference between comparator BG negative input end in1 and the positive input terminal in2 is very little, in a short period of time, the positive input terminal in2 current potential of comparator BG can be higher than the negative input end in1 current potential of comparator BG rapidly, so comparator BG can respond fast and send triggering signal, stop charging thereby in time control charger, prevent over-charging of battery.
Embodiment two: as shown in Figure 3, the charging control circuit of this rechargeable battery, it comprises the charger with control end CTR, is recharged battery DC and battery and is full of the electrical measurement circuit; Wherein, it is core with comparator BG that described battery is full of the electrical measurement circuit, comprise first resistance R 1, second resistance R 2, first diode D1 and the capacitor C, be attempted by after first resistance R 1,2 series connection of second resistance R and be recharged battery DC two ends, be recharged the minus earth of battery DC.
Also include the second diode D2, the 4th resistance R 4 and the 5th resistance R 5, the described second diode D2 is serially connected between first resistance R 1 and second resistance R 2, be connected in parallel on the second diode D2 two ends after described the 4th resistance R 4 and the 5th resistance R 5 serial connections, wherein, the negative electrode one tunnel of the described first diode D1 is through capacitor C and ground connection, and the positive input terminal in2 of described comparator BG is inserted on another road; The anode one tunnel of the described second diode D2 connects the positive pole that is recharged battery DC through first resistance R 1, and another Lu Jingdi four resistance R 4 connect the first diode D1 anode; The negative electrode one tunnel of the described second diode D2 connects the anode of the first diode D1 through the 5th resistance R 5, and another road meets the negative input end in1 of comparator BG; The negative input end in1 of described comparator BG connects the negative pole that is recharged battery DC through second resistance R 2 again, and the output out of described comparator BG then inserts the control end CTR of described charger.
The charging process of embodiment two is identical with embodiment's one, when battery DC is full of electricity, charging voltage begins to descend after reaching the top, the negative input end in1 current potential of comparator BG also descends thereupon, at this moment, the first diode D1 plays the effect of a unidirectional conducting in control circuit, be in reverse-bias state during discharge, the velocity of discharge is very slow, and the second diode D2 is because dynamically internal resistance is very little, play the effect of a voltage stabilizing at this, i.e. the pressure drop at the second diode D2 two ends is constant substantially.At this moment, the pressure drop at the 4th resistance R 4 and two ends, the 5th resistance R 5 series connection back also is to remain unchanged substantially, regulate the voltage ratio of the 4th resistance R 4 and the 5th resistance R 5, make the pressure drop of the 5th resistance R 5 be lower than and near the pressure drop of the first diode D1, reduced potential difference between comparator negative input end in1, the positive input terminal in2, in case rechargeable battery DC two ends produce negative increment of voltage-Δ V, comparator BG just can respond and produce triggering signal fast, thereby improved the sensitivity of comparator BG, made the The whole control circuit be in optimum state.
Claims (4)
1. the charging control circuit of a rechargeable battery, it comprises the have control end charger of (CTR), be recharged battery (DC) and battery and be full of the electrical measurement circuit, wherein, it is core with comparator (BG) that described battery is full of the electrical measurement circuit, comprise first resistance (R1), second resistance (R2), first diode (D1) and electric capacity (C), be attempted by after first resistance (R1), second resistance (R2) series connection and be recharged battery (DC) two ends, be recharged the minus earth of battery (DC);
It is characterized in that: also be connected in series one the 3rd resistance (R3) between described first resistance (R1) and second resistance (R2), the anode one tunnel of described first diode (D1) connects the positive pole that is recharged battery (DC) through first resistance (R1), another Lu Jingdi three resistance (R3) insert the negative input end (in1) of comparator (BG), the negative electrode one tunnel of described first diode (D1) is through electric capacity (C) and ground connection, and the positive input terminal (in2) of described comparator (BG) is inserted on another road; The negative input end (in1) of described comparator (BG) connects the negative pole that is recharged battery (DC) through described second resistance (R2), the output (out) of described comparator (BG) then inserts the control end (CTR) of described charger, and, the resistance of described the 3rd resistance (R3) meets the following conditions: regulate the resistance of the 3rd resistance (R3), make described the 3rd resistance (R3) pressure drop less than and near the pressure drop of described first diode (D1).
2. according to the charging control circuit of the described rechargeable battery of claim 1, it is characterized in that: described the 3rd resistance (R3) is variable resistor.
3. the charging control circuit of a rechargeable battery, it comprises the have control end charger of (CTR), be recharged battery (DC) and battery and be full of the electrical measurement circuit, wherein, it is core with comparator (BG) that described battery is full of the electrical measurement circuit, comprise first resistance (R1), second resistance (R2), first diode (D1) and electric capacity (C), be attempted by after first resistance (R1), second resistance (R2) series connection and be recharged battery (DC) two ends, be recharged the minus earth of battery (DC);
It is characterized in that: also include second diode (D2), the 4th resistance (R4) and the 5th resistance (R5), described second diode (D2) is serially connected between first resistance (R1) and second resistance (R2), be connected in parallel on second diode (D2) two ends after described the 4th resistance (R4) and the 5th resistance (R5) serial connection, wherein, the negative electrode one tunnel of described first diode (D1) is through electric capacity (C) and ground connection, and the positive input terminal (in2) of described comparator (BG) is inserted on another road; The anode one tunnel of described second diode (D2) connects the positive pole that is recharged battery (DC) through first resistance (R1), and another Lu Jingdi four resistance (R4) connect first diode (D1) anode; The negative electrode one tunnel of described second diode (D2) connects the anode of first diode (D1) through the 5th resistance (R5), and another road connects the negative input end (in1) of comparator (BG); The negative input end (in1) of described comparator (BG) connects the negative pole that is recharged battery (DC) through second resistance (R2) again, the output (out) of described comparator (BG) then inserts the control end (CTR) of described charger, and, the resistance of described the 4th resistance (R4) and the 5th resistance (R5) meets the following conditions: regulate the voltage ratio of described the 4th resistance (R4) and the 5th resistance (R5), make described the 5th resistance (R5) pressure drop less than and near the pressure drop of described first diode (D1).
4. according to the charging control circuit of the described rechargeable battery of claim 3, it is characterized in that: described the 4th resistance (R4) or the 5th resistance (R5) are variable resistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100635786A CN101373903B (en) | 2008-06-19 | 2008-06-19 | Charging control circuit for charging battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100635786A CN101373903B (en) | 2008-06-19 | 2008-06-19 | Charging control circuit for charging battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101373903A CN101373903A (en) | 2009-02-25 |
| CN101373903B true CN101373903B (en) | 2010-06-02 |
Family
ID=40447896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100635786A Expired - Fee Related CN101373903B (en) | 2008-06-19 | 2008-06-19 | Charging control circuit for charging battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101373903B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539947A (en) * | 2010-12-29 | 2012-07-04 | 东莞市妙达电动工具制造有限公司 | Active voltage negative increase tester for charger testing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2278022A (en) * | 1993-04-12 | 1994-11-16 | Lead Electronic Co Ltd | Circuit for detecting charged state of a battery by sensing -DELTA V |
| CN2574279Y (en) * | 2002-10-09 | 2003-09-17 | 刘玉环 | Cell charging circuit |
| CN201048303Y (en) * | 2007-05-29 | 2008-04-16 | 彭耀庆 | Charging control circuit of charger |
| CN201210625Y (en) * | 2008-06-19 | 2009-03-18 | 何岳明 | Charging control circuit of charging battery |
-
2008
- 2008-06-19 CN CN2008100635786A patent/CN101373903B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2278022A (en) * | 1993-04-12 | 1994-11-16 | Lead Electronic Co Ltd | Circuit for detecting charged state of a battery by sensing -DELTA V |
| CN2574279Y (en) * | 2002-10-09 | 2003-09-17 | 刘玉环 | Cell charging circuit |
| CN201048303Y (en) * | 2007-05-29 | 2008-04-16 | 彭耀庆 | Charging control circuit of charger |
| CN201210625Y (en) * | 2008-06-19 | 2009-03-18 | 何岳明 | Charging control circuit of charging battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101373903A (en) | 2009-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10103412B2 (en) | Universal rechargeable battery constituted by employing lithium-ion battery and control method | |
| CN101960690B (en) | Recharging device and recharging method | |
| CN1316710C (en) | Accumulator, super capacitor charge-discharge equalizing method and equipment | |
| CN104145399B (en) | Battery control system and set of cells | |
| RU2526854C2 (en) | Improved system of accumulator batteries | |
| US7847519B2 (en) | Smart battery protector with impedance compensation | |
| CN110268594B (en) | Battery pack and method for controlling charging of battery pack | |
| US8476869B2 (en) | Battery voltage equalizer circuit and method for using the same | |
| CN101692582B (en) | Charge/discharge control circuit and battery device | |
| US20120161709A1 (en) | Secondary-battery control apparatus | |
| US9906052B2 (en) | Power supply device | |
| JPWO2010113206A1 (en) | Charger | |
| CN104981959A (en) | Circuit for managing the charge of a battery | |
| CN205693385U (en) | Battery charger | |
| CN202121027U (en) | Battery with high-accuracy current protection circuit | |
| CN104681889A (en) | Automatic gear shift charging method of charger and charging and detecting circuit thereof | |
| US20080174263A1 (en) | Battery charger for different capacity cells | |
| CN201210625Y (en) | Charging control circuit of charging battery | |
| CN101373903B (en) | Charging control circuit for charging battery | |
| CN102810698B (en) | Storage battery pack, and method and system for storage battery pack charge and discharge management | |
| CN216134297U (en) | External battery module supporting charging and discharging different ports | |
| CN100389531C (en) | Three-stage charging voltage regulator | |
| CN105140989A (en) | Charging control device for charger | |
| CN107306040B (en) | Control method for equalizing charge of battery | |
| CN113178631A (en) | Modularization lithium iron phosphate battery pack with partial charging protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170523 Address after: 315181, Zhejiang, Ningbo province Haishu district town of water side street village Patentee after: Ningbo Tianhong Electronics Co., Ltd. Address before: 315181, Zhejiang, Yinzhou District, Ningbo Province town of Ningbo Sea King Electric Appliance Co., Ltd. Patentee before: He Yueming |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100602 Termination date: 20200619 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |