CN2198706Y - High efficiency protective charger - Google Patents
High efficiency protective charger Download PDFInfo
- Publication number
- CN2198706Y CN2198706Y CN 94220065 CN94220065U CN2198706Y CN 2198706 Y CN2198706 Y CN 2198706Y CN 94220065 CN94220065 CN 94220065 CN 94220065 U CN94220065 U CN 94220065U CN 2198706 Y CN2198706 Y CN 2198706Y
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- battery
- charger
- charge
- circuit
- charging
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- Expired - Fee Related
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Abstract
The utility model relates to a device for charging for a battery adopting a pulse mode, which is suitable for a nickel-hydrogen battery and a nickel-cadmium battery. The utility model comprises a dc power supply circuit, a pulse generator, a time controller, a charge and a discharge return circuit and a monitoring return circuit. Stepped pulse charging current is adopted; the protection for the battery is double protection of the monitoring of the voltage of a rechargeable battery and the control of the charging time. When the voltage or the time achieves definite quality, the charging can be converted into the trickle charging; the parallel form is adopted by the rechargeable batteries, each rechargeable battery is carried out the charging and the monitoring for voltage; the higher conversion efficiency from electrical energy to chemical energy can be assured; the quick charging can be realized; the battery can be protected from the damage caused by the over charge.
Description
The utility model relates to a kind of device that rechargeable battery is charged, and is applicable to Ni-MH battery and nickel-cadmium cell are charged.
Since hydride battery have capacity higher (one the joint No. 5 battery capacities be 800～1200mAh), allow the characteristics of large current charge, for this reason, people consider with big electric current Ni-MH battery to be charged, the advanced pulse mode of available technology adopting realizes quick charge, eliminate polarization by discharging, for example: Chinese patent application CN2080256U discloses a kind of " family expenses quick charger ", the battery of this charger all adopts and is connected in series, because the inconsistency of Ni-MH battery performance, some over-charging of battery or foot phenomenon and damage battery not will appear; The Ni-MH battery price is higher in addition; to battery protection is very important; when using than large current charge to 75% when above of about total capacity, if continue to use than large current charge, degree of polarization is increase rapidly; battery also reduces rapidly the ability to accept of electric current; the efficient that causes electric energy to change into chemical energy reduces, and at this moment inside battery is assembled excessive gas, and cell voltage increases rapidly; can blow out phenomenon when serious, the damage battery.
The purpose of this utility model is to obtain a kind of charger, can adopt different electric currents to carry out the segmented charging to improve the conversion efficiency that electric energy is transformed into chemical energy to battery; Battery adopts and is connected in parallel, and every battery is monitored, and guarantees that battery is sufficient and does not overcharge damage.
For achieving the above object, the utility model is achieved in that
This charger is made up of DC power supply circuit, pulse generator, charge circuit, discharge loop and monitoring circuit, provide DC power supply by DC power supply circuit to charger, pulse generator produces the cycle square wave charge and discharge loop is controlled, and battery is carried out the periodicity charge and discharge; The end that goes out of pulse generator also is connected to time controller in this charger, controls gate-controlled switch K1, K2 respectively, electric current and trickle charge in changing over to respectively when the charging interval reaches set point; The end that goes out of DC power supply circuit also is connected to voltage stabilizing circuit, for monitoring circuit provides stable benchmark voltage, when cell voltage greater than, when equaling reference voltage, be about to large current charge and change trickle charge over to; Rechargeable battery adopts parallel form to carry out charge and discharge and voltage monitoring respectively.
Charge circuit by greatly/middle current charges and two circuit of trickle charge compose in parallel.
The termination that goes out of DC power supply circuit has voltage stabilizing circuit and benchmark to join.
The control end of gate-controlled switch K2 is connected to a toggle switch K.
The negative input end of comparator Ic8 is connected to gate-controlled switch and capacitor charging circuit and prolongs a period of time with control and gather cell voltage again in the monitoring circuit.
Above-mentioned gate-controlled switch adopts the noncontacting switch of integrated chip.
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 is the circuit block diagram of this charger.
The oscillogram of electric current when Fig. 2 is these charger charge and discharge.
Fig. 3 is the circuit diagram of the utility model embodiment.
The charge and discharge effect contrast figure that Fig. 4 is compared with the prior art for the utility model.
This charger is made up of following several parts, referring to Fig. 1,3:
DC power supply circuit: by transformer B, rectifier bridge QL, capacitor C 1 forms, this circuit with AC signal by rectification, capacitor filtering after, be transformed into direct current signal, for whole charger provides dc source.
Simultaneously, dc source is prevented power network fluctuation and is disturbed comparator Ic7, the Ic8 malfunction that brings by the mu balanced circuit that Ic9, C4 form.
Gate-controlled switch K1, K2 are four two-way switch Ic4, Ic5.
Time controller: by reset switch AN, resistance R 3, phase inverter Ic3-1,2 and pulse carry counting system device Ic2 form, when arriving first time set value, gate-controlled switch K2 disconnects, change middle current charges over to by large current charge, when arriving second setting value, disconnect gate-controlled switch K1, charging current changes trickle over to by middle electric current.
Impulse generator: formed by Ic1, resistance R 1, R2, switching diode D1, capacitor C 2, The pulse signal that produces is controlled the charge and discharge loop, and the battery charging makes battery discharge during high level during low level.
Charge circuit: by greatly/middle current charges and trickle charge two parts form, big/middle current charging circuit comprises triode T1, resistance R 5, R6, with big/middle current charges, during the T1 cut-off, electric current carries out trickle charge by resistance R 7 during the T1 conducting.
Discharge loop: by triode T2, resistance R 8, R9, comparator Ic7 forms, during comparator Ic7 output high level, and triode T2 conducting, battery discharge.
Monitoring circuit: by comparator Ic7, Ic8, switching diode D4, phase inverter Ic3, capacitor C 3, resistance R 11, gate-controlled switch Ic6 forms, when cell voltage reaches the voltage of benchmark 2, comparator Ic8 output low level, gate-controlled switch Ic4 is disconnected, change trickle charge over to, simultaneously, also make Ic3-3 output high level, switch I c6 closes, can not transfer middle current charges to when guaranteeing trickle charge, Ic7 goes out end through D4 gauge tap Ic6, and cell voltage is through resistance R 11, after the capacitor C 3, guarantee that the negative input end of Ic8 is gathered cell voltage again at battery discharge after a period of time.
Compared with prior art; charger of the present utility model is with pulse+stepped charging (showing as Fig. 2) battery to be charged; promptly when reach with great current cell charging about total capacity 75% the time; charging current is reduced half; the degree of polarization of battery is eased; improve depth of charge, make whole charging process protect the electric energy of greater efficiency to change always to chemical energy.
Fig. 4 provides the effect that this charging modes is compared with the prior art.Fig. 4 is for being the charging and discharging curve of 900mAh Ni-MH battery to a joint capacity, and the curve I is I in the prior art
Fill=0.5A, I
PutThe charging curve of the pulse mode of=0.2A, the total capacity of battery are 750mAh; The curve II is that the utility model is with I
Fill=0.5A charging is after 65 minutes, again with I
Fill=0.25A charging is after 105 minutes, and battery capacity reaches 980mAh; The curve III is after the form with the curve II charges the battery, with I
Put=0.25A discharge curve, discharge capacity has reached 900mAh.
Rechargeable battery of the present utility model adopts parallel connection, and the voltage of every battery is monitored, and when cell voltage reaches set point, just cuts off large current charge immediately, changes trickle charge over to, guarantees that battery does not overcharge, and prolongs the useful life of battery.
Simultaneously the utility model is to realize protection to battery with the duplicate protection of control charging interval and charged battery voltage, because battery consistency is bad, some battery can only be charged to 1.4V, just must take off after therefore reaching certain hour.
The utility model employing gathers cell voltage after discharge cycle postpones certain hour and set point compares, and the voltage fluctuation that records after a period of time because the voltage ratio that battery records when charging is discharged is big.
In circuit, select for use the noncontacting switch of integrated chip to realize automatic control, prolonged the useful life of charger.
Introduce an embodiment of the present utility model below.
The key technical indexes of this embodiment is: with charging pulse width 40 seconds, 5 seconds pulsating current of discharge pulse width, the mode that No. 5 Ni-MH batteries of 1～4 joint carry out pulse and ladder is charged, input voltage 220V, charging current is respectively 0.5A, 0.25A, 0.05A discharging current is 0.2A.
Reset switch AN, R3, inverter Ic3-1,2(4069) and pulse carry counting system device Ic2(4020) form timer, click the AN zero clearing after, timer is started working, the time of setting was respectively 1.6 hours and 3.2 o'clock.If the capacity of rechargeable battery is during more than or equal to 800mAh, K closes with toggle switch, battery E is after the current charges of about 1.6 hours 0.5A, the 13 pin output high level of Ic2, behind inverter Ic3-2, become low level, Ic5 is disconnected, and at this moment charger just charges to battery E with the electric current of 0.25A.If battery capacity is less than 800mAh, toggle switch K is disconnected, gate-controlled switch Ic5 is disconnected, at this moment charger just charges to battery E with the middle electric current of 0.25A, after the charging interval reaches 3.2 hours, 12 pin of Ic2 output high level disconnects Ic4, and charging current is by resistance R 7(150 Ω) become the trickle charge of 0.05A.
Ic1(NE555), resistance R 1, R2, switching diode D1, capacitor C 2 are formed pulse generators, by the cycle square wave that its produces charger charge and discharge loop are controlled.After pressing reset switch AN, when K switch was closed, the low level of 13,12 pin of Ic2 output was through inverter Ic3-1, became high level after 2, made four bidirectional switch Ic4, Ic5(4066) close.When 3 pin of Ic1 were exported high level, triode T1 conducting was charged about 40 seconds to battery E with constant current 0.5A through R6, T1 by direct voltage source.When the 3 pin output low levels of Ic1, T1 ends, and makes comparator Ic7(LM324) the output high level, triode T2 conducting, battery E discharged about 5 seconds through resistance R 8, triode T2, made LED 1 bright about 5 seconds (redness).The high level of Ic5 output makes four bidirectional switch Ic6(4066 through switching diode D4) close, cell voltage gives capacitor C 3 chargings through resistance R 11, the negative input end of comparator Ic8 collects the voltage after capacitor C 3 was charged through 5 seconds, compare with the voltage (about 1.43V) of benchmark 2, when voltage is lower than reference voltage (1.43V), Ic8 output high level makes switch I c4 still close behind D2, and when Ic8 negative input end voltage is higher than the voltage of benchmark 2, the Ic8 output low level, Ic4 disconnects, T1 ends, at this moment cell voltage inputs to the negative terminal (v〉0.8V) of comparator Ic7 through D3, and with benchmark 1 voltage (0.7v) relatively, make the Ic7 output low level, T2 ends.The low level of comparator Ic8 output also closes Ic6 through inverter Ic3, to guarantee Ic8 output low level always, no longer upset is high level, power supply is through trickle resistance R 7, make charger enter trickle (＜0.05A) charged state, the low level of Ic8 output also makes LED 2 bright (green) simultaneously, and the expression battery has been full of and can have used.
Using method of the present utility model is:
At first have a look the battery capacity of required charging, if 〉=800mAh, K switch is closed, if battery capacity＜800mAh(such as nickel-cadmium cell), K switch is disconnected, then battery (1～4 joint) is put into battery and close, the power supply of charger is plugged the power supply of 220V, click reset switch AN, at this moment red light emitting diodes flashes (frequency is to go out in 40 seconds, and 5 seconds bright) expression and has entered charged state, after about 3.2 hours, battery is substituted the bad for the good, red diode is no longer flashed, and green LED is bright, if not urgently needed, again through trickle charge after 20～30 minutes, battery is full of fully, reaches 100%, because battery has self-discharge phenomenon, and trickle charge is harmless to battery, so also can ready access upon use.
Claims (5)
1, a kind of high efficiency protection type charger (hereinafter to be referred as " charger "); form by DC power supply circuit, pulse generator, charge circuit, discharge loop and monitoring circuit; provide DC power supply by DC power supply circuit to charger; pulse generator produces the cycle square wave charge and discharge loop is controlled; battery is carried out the periodicity charge and discharge, it is characterized in that:
This charger also comprises: pulse generator go out the free controller of termination, control gate-controlled switch K1, K2 respectively, electric current and trickle charge in when the charging interval reaches set point, changing over to respectively,
The end that goes out of the DC power supply circuit of this charger also is connected to voltage stabilizing circuit and provides stable benchmark voltage for monitoring circuit, when cell voltage greater than, when equaling reference voltage, be about to large current charge and change trickle charge over to;
The battery of this charger adopts parallel form to carry out charge and discharge and voltage monitoring respectively.
2, charger according to claim 1 is characterized in that: described charge circuit by greatly/middle current charges and two circuit of trickle charge compose in parallel.
3, charger according to claim 1 is characterized in that: the control end of gate-controlled switch K2 is connected to a toggle switch K.
4, charger according to claim 1 is characterized in that: the negative input end of comparator Ic8 is connected to the control of gate-controlled switch and capacitor charging circuit and prolongs a period of time and gather cell voltage again in the monitoring circuit.
According to the described charger of claim 1～5, it is characterized in that 5, described gate-controlled switch adopts the noncontacting switch of integrated chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94220065 CN2198706Y (en) | 1994-09-06 | 1994-09-06 | High efficiency protective charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94220065 CN2198706Y (en) | 1994-09-06 | 1994-09-06 | High efficiency protective charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2198706Y true CN2198706Y (en) | 1995-05-24 |
Family
ID=33834758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94220065 Expired - Fee Related CN2198706Y (en) | 1994-09-06 | 1994-09-06 | High efficiency protective charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2198706Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013170501A1 (en) * | 2012-05-17 | 2013-11-21 | 天津市畅和科技有限公司 | Activation device for intelligent storage battery |
| CN103531858A (en) * | 2012-07-03 | 2014-01-22 | 上海汽车集团股份有限公司 | Stepping battery charging method and stepping battery charging device |
| CN106505646A (en) * | 2015-09-05 | 2017-03-15 | 重庆宁来科贸有限公司 | Constant current is filled and stops formula charger |
| CN106532787A (en) * | 2015-09-09 | 2017-03-22 | 重庆宁来科贸有限公司 | Constant-current type mixed pulse charging device |
| CN106532788A (en) * | 2015-09-09 | 2017-03-22 | 重庆宁来科贸有限公司 | Double-selection N type constant-current pulse type charging device |
| CN106712140A (en) * | 2015-08-24 | 2017-05-24 | 重庆宁来科贸有限公司 | Integrated timing type constant current charger |
| WO2017143761A1 (en) * | 2016-02-23 | 2017-08-31 | 宁德新能源科技有限公司 | Method for recharging rechargeable battery |
| US11114878B2 (en) | 2018-03-26 | 2021-09-07 | Milwaukee Electric Tool Corporation | High-power battery-powered portable power source |
| USD933010S1 (en) | 2019-05-29 | 2021-10-12 | Milwaukee Electric Tool Corporation | Portable power source |
| US11271415B2 (en) | 2018-05-18 | 2022-03-08 | Milwaukee Electric Tool Corporation | Portable power source |
-
1994
- 1994-09-06 CN CN 94220065 patent/CN2198706Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013170501A1 (en) * | 2012-05-17 | 2013-11-21 | 天津市畅和科技有限公司 | Activation device for intelligent storage battery |
| CN103531858A (en) * | 2012-07-03 | 2014-01-22 | 上海汽车集团股份有限公司 | Stepping battery charging method and stepping battery charging device |
| CN103531858B (en) * | 2012-07-03 | 2015-11-18 | 上海汽车集团股份有限公司 | Battery stepping charge control method and battery stepping charging device |
| CN106712140A (en) * | 2015-08-24 | 2017-05-24 | 重庆宁来科贸有限公司 | Integrated timing type constant current charger |
| CN106505646A (en) * | 2015-09-05 | 2017-03-15 | 重庆宁来科贸有限公司 | Constant current is filled and stops formula charger |
| CN106532788A (en) * | 2015-09-09 | 2017-03-22 | 重庆宁来科贸有限公司 | Double-selection N type constant-current pulse type charging device |
| CN106532787A (en) * | 2015-09-09 | 2017-03-22 | 重庆宁来科贸有限公司 | Constant-current type mixed pulse charging device |
| WO2017143761A1 (en) * | 2016-02-23 | 2017-08-31 | 宁德新能源科技有限公司 | Method for recharging rechargeable battery |
| US11114878B2 (en) | 2018-03-26 | 2021-09-07 | Milwaukee Electric Tool Corporation | High-power battery-powered portable power source |
| US11271415B2 (en) | 2018-05-18 | 2022-03-08 | Milwaukee Electric Tool Corporation | Portable power source |
| US11742771B2 (en) | 2018-05-18 | 2023-08-29 | Milwaukee Electric Tool Corporation | Portable power source |
| USD933010S1 (en) | 2019-05-29 | 2021-10-12 | Milwaukee Electric Tool Corporation | Portable power source |
| USD955334S1 (en) | 2019-05-29 | 2022-06-21 | Milwaukee Electric Tool Corporation | Portable power source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |