CN2753037Y - Battery charger - Google Patents
Battery charger Download PDFInfo
- Publication number
- CN2753037Y CN2753037Y CNU2004200236355U CN200420023635U CN2753037Y CN 2753037 Y CN2753037 Y CN 2753037Y CN U2004200236355 U CNU2004200236355 U CN U2004200236355U CN 200420023635 U CN200420023635 U CN 200420023635U CN 2753037 Y CN2753037 Y CN 2753037Y
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- reference voltage
- charging
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a universal charger for an alkaline battery and a nickel-cadmium or a nickel-hydrogen battery, which has the advantage of reasonable structure and the function of accurate stop of the charging and can automatically adjust the quantity of the charging current according to the charge condition. The utility model is characterized in that an operating circuit of the utility model comprises a shallow pulse DC power supply, a reference voltage prewired circuit, a sampling comparison circuit, a charge indicating circuit and an adjusting link. A reference voltage can be preset at the input terminal of the sampling comparison circuit through the reference voltage prewired circuit. The sampling comparison circuit carries out comparison to the input voltages of the input terminal of the reference voltage and the input terminal of the current voltage of a sampling charging battery which have the same electric potential reference point. The output terminals respectively output the corresponding control currents to the adjusting link and the charge indicating circuit to control the quantity and the stop of the shallow pulse DC charge current which is output from the adjusting link to a charging port and also control the states of light emission and quenching of the charge indicating circuit.
Description
Technical field:
The utility model relates to a kind of battery charger, is specifically related to a kind of alkaline battery and nickel-cadmium/nickel-hydrogen cell universal charger.
Background technology:
The user always wishes rechargeable battery is carried out quick, effective, safe charging, yet quick charge just needs to use bigger electric current, the phenomenon of battery heating can appear in battery in the charging process of big electric current, and when using large current charge, after battery is full of, stop as untimely, battery is heating rapidly, can cause battery to burn when serious or explodes.
If yet adopt little electric current trickle charge mode, the charging interval is long, not only can elongate the charging monitoring time, causes waste of electric energy; And long-time low current charge, very easily cause charging process " polarization " phenomenon to occur, the inner appearance vulcanized crystallization, greatly shortened the life-span that recycles of battery.
In order to address this problem, modern nickel chromium triangle/Ni-MH battery charger adopts the pulse current charge mode mostly.The pulse current charge mode is the new development of battery charge theory, the pulse current charge mode promptly is that charging current is exported with pulse mode, make battery in the process of charging, in time suspend charging, just can eliminate various polarizing voltages quickly and effectively, thereby the raising charging rate can also be accelerated the reaction speed of active material, prevents to vulcanize crystallization and battery heating phenomenon effectively.
But quick charger not only wants to solve polarity effect and heating phenomenon, also must possess the automatic stop function simultaneously, just can make the charging highly effective and safe.
Nickel chromium triangle/Ni-MH battery the charger that possesses the automatic stop function on the market is to use the detection mode of negative increment of voltage (Δ V) to judge whether battery is full of (that is: to utilize battery voltage when accepting charging to rise, voltage is maximum when being full of, voltage can descend on the contrary when overcharging, promptly the characteristic of appearance " Δ V " is finished the automatic control to charging process), a kind of nickel chromium triangle/Ni-MH battery charging circuit that possesses the automatic stop function is disclosed as the novel ZL02260542.8 of practicality, it comprises that the voltage peak sampling keeps and the input voltage comparison control circuit, and described input voltage comparison control circuit is by the cell voltage pressure sampling circuit, peak value adopts holding circuit,-Δ V comparison control circuit, the D1 reverse leakage current suppresses circuit, burning voltage is made peak value sampling and is kept electric capacity anode reference voltage circuit, amplifier input bias current suppresses circuit and forms.The weak point of this charger is complex structure, and cost is higher, and can not adjust the size of charging current according to charge condition automatically.
In addition, the consumer thought that the alkaline battery charging can set off an explosion or leakage in the past, thereby dare not charge easily to alkaline battery, abandoned with being about to alkaline battery after the photoelectricity, so not only can waste resource and cause environmental pollution easily.The expert points out: " such record arranged: ' the charging life-span of No. five alkaline batteries of LR6 is 30-45 time ' in " modern eelctrical engineering handbook " revised edition." so alkaline battery is not to charge; as long as resolve heating and the polarization phenomena of alkaline battery in charging process; avoid alkaline battery to overcharge or overheated, just can carry out the reproducibility charging, help environmental protection and resources conservation greatly alkaline battery.
And alkaline battery is different with the end of charge voltage of nickel chromium triangle/Ni-MH battery, on the market alkaline battery and the general automatic charger of nickel-cadmium/nickel-hydrogen cell is not arranged as yet now, brings inconvenience to the consumer.
Summary of the invention:
The purpose of this utility model provides a kind of rational in infrastructure, can adjust the size of charging current according to charge condition automatically, has the alkaline battery and the nickel-cadmium/nickel-hydrogen cell universal charger that accurately stop to fill function.
For realizing above purpose, the technical scheme that the utility model adopted is:
A kind of battery charger, the charging pedestal is by housing and place the circuit with the work of pulse current charge mode of its inside to form, the housing upper surface is provided with for the dimple of placing pond to be charged, be provided with charging port 6 in the dimple, the setting of charging port 6 and make pond to be charged insert dimple with being electrically connected of operating circuit after, can correctly transmit charging current and battery signal between battery and the circuit, described circuit with the work of pulse current charge mode comprises shallow Voltage pulsating direct-current supply generation circuit 1, it is characterized in that: described circuit with the work of pulse current charge mode also comprises:
Shallow Voltage pulsating direct-current supply generation circuit 1: alternating current is become the direct current with the variation of tentering value,, provide operating voltage for reference voltage prewired circuit 2 and sampling comparison circuit 3 simultaneously for adjusting link and operating current being provided;
Reference voltage prewired circuit 2: the generation circuit that is two kinds of reference voltages;
Sampling comparison circuit 3:, and compare the output control signal to being recharged the voltage sample of battery with reference voltage;
Charging indication 4:, control the luminance of one group of indicator light, to represent the operating state of current charger according to the control signal of sampling comparison circuit;
Adjust link 5: the size that is used to adjust charging current.
The current output terminal mouth of described shallow Voltage pulsating direct-current supply generation circuit 1 is connected with the charge power supply input port of adjusting link 5, and described shallow Voltage pulsating direct-current supply generation circuit 1 voltage output end is connected with the working power input port of reference voltage prewired circuit 2, sampling comparison circuit 3 respectively;
The reference voltage output end of described reference voltage prewired circuit 2 is connected with the reference voltage input of sampling comparison circuit 3; The sampled voltage input of described sampling comparison circuit 3 is connected with charging port 6 sampled voltage outputs, and the Control current output of sampling comparison circuit 3 is connected with the Control current input of adjusting link 5 and the current input terminal of charging indication 4,
Described shallow Voltage pulsating direct-current supply generation circuit 1 is made up of the bridge rectifier that power transformer T1 and diode D1, D2, D3, D4 form, power transformer T1 becomes required magnitude of voltage with the alternating voltage of AC network 220V, and the bridge rectifier of forming by diode D1, D2, D3, D4 becomes alternating voltage the direct voltage of pulsation then.
Described charging indication 4 is a LED 1.
Described adjustment link 5 is an adjustment triode Q1, and the collector electrode of Q1 is connected with the current output terminal of bridge rectifier by current-limiting resistance R3, and the emitter of Q1 connects charging port.
Described sampling comparison circuit 3 is two operational amplifier U3, U4, the input of U3, U4 is a reference voltage input, another input connects the sampled voltage output of charging port, the operating current input of U3, U4 is connected with the current output terminal of bridge rectifier by current-limiting resistance R5, the output of U4 is connected with the base stage of Q1 by current-limiting resistance R1
Described reference voltage prewired circuit comprises divider resistance R6, R8, and LED 3 and double linkage brake knife switch K constitute.
Described double linkage brake knife switch K when closure state 1, LED 3 and the operating voltage output that is connected bridge rectifier after resistance R 6 is connected, the tie point of light-emitting diode and resistance R 6 is as reference voltage V
1It is vacant that output and the reference voltage input of sample comparison circuit 3 are connected resistance R 8.
Described double linkage brake knife switch K is when closure state 2, and resistance R 8 is series at the operating voltage output that is connected bridge rectifier with resistance R 6, and the tie point of resistance R 8 and resistance R 6 is as reference voltage V
2Output is connected with the reference voltage input of sampling comparison circuit 3; LED 3 is vacant.
The beneficial effect that the utility model can bring is:
(1) fully takes into account the electrochemical reaction characteristic of battery chemistries, adopt shallow pulse current to charge,, can accomplish fully to eliminate polarization phenomena, the useful life of real effectively protection battery through debugging and parameter matching.
(2) not only have accurate automatic stop function, and can adjust the size of charging current automatically, stop the heating phenomenon of battery in charging process, will never overcharge or undercharge according to charge condition, rational in infrastructure, safe and reliable.
(3) solved alkaline battery and nickel-cadmium/nickel-hydrogen cell because of the different problems that can not general a kind of charger of end of charge voltage, provide high alkaline battery of a kind of cost performance and the general automatic charger of nickel-cadmium/nickel-hydrogen cell, for the consumer brings convenience.
Description of drawings:
Fig. 1: operating circuit block diagram of the present utility model
Fig. 2: the acp chip structural representation of embodiment of the present utility model
Fig. 3: the circuit theory diagrams of embodiment of the present utility model
Embodiment:
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Referring to Fig. 1, operating circuit of the present utility model comprises shallow Voltage pulsating direct-current supply generation circuit, reference voltage prewired circuit, sampling comparison circuit, charging indication, adjustment link.
Described shallow Voltage pulsating direct-current supply generation circuit is connected with the charge power supply input port of adjusting link, provide shallow pulsating direct current charging current by adjusting link for charging port, described shallow Voltage pulsating direct-current supply generation circuit is connected with the working power input port of reference voltage prewired circuit, sampling comparison circuit, for reference voltage prewired circuit, sampling comparison circuit provide working power.
The reference voltage output end of described reference voltage prewired circuit is connected with the reference voltage input of sampling comparison circuit; The sampled voltage input of described sampling comparison circuit is connected with charging port sampled voltage output, the output of sampling comparison circuit is connected with the Control current input of adjusting link and the current input terminal of charging indication, the sampling comparison circuit by it there being the common electric potential reference point reference voltage input and the input voltage of sampled voltage input compare, export Control current respectively at the output of sampling comparison circuit and give adjustment link and charging indication, adjust link outputs to the shallow pulsating direct current charging current of charging port according to this Control current adjustment size, and when being zero, the output current of output of sampling comparison circuit stops to export shallow pulsating direct current charging current, charging indication keeps luminance when the output of sampling comparison circuit has output current, extinguish with the indication charging when the output output current of sampling comparison circuit is zero and finish.
Fig. 2, Fig. 3 provide an embodiment of the present utility model.This embodiment provides the charging circuit that two batteries are charged simultaneously, be about to the circuit parallel connection that is used for batteries charging described in two the utility model, if three joints or above battery are charged simultaneously, as long as the circuit described in the utility model of similar number is in parallel.
Referring to Fig. 2, acp chip U is an integrated chip, is made up of four operational amplifier U1, U2, U3, U4.Pin 11 is power source supply ends of integrated chip U; Pin 4 is earth terminals of integrated chip U; Pin 1 is that the output of U1, the output that pin 7 is U2, output, the pin 14 that pin 8 is U3 are outputs of U4; Pin 2, pin 3 are inputs of U1, and pin 5, pin 6 are inputs of U2, and pin 9, pin 10 are inputs of U3, and pin 12, pin 13 are inputs of U4.
Referring to Fig. 3, shallow Voltage pulsating direct-current supply generation circuit described in the utility model can adopt transformation, rectification, technology such as filtering are formed required circuit, adopt power transformer T1 that the alternating voltage of AC network 220V is become required magnitude of voltage in the present embodiment earlier, then by diode D1, D2, D3, the bridge rectifier that D4 forms becomes alternating voltage the direct voltage of pulsation, it provides working power for integrated chip U to resulting direct voltage on the one hand, its anode connects the pin 11 of integrated chip U by divider resistance R6, its negative terminal connects the earth terminal pin 4 of integrated chip U, at the pin 11 of integrated chip U, thereby the filter circuit of pressure-stabilizing that is composed in parallel by voltage stabilizing thyristor DW and filter capacitor C1 in parallel makes as the direct voltage of integrated chip U working power more stable between the pin 4; It provides direct current shallow pulsation charge power supply for charging circuit on the other hand, and its anode connects the collector electrode of triode Q1 and the collector electrode that meets triode Q2 by current-limiting resistance R4 by current-limiting resistance R3.
Connect the emitter of triode Q1 behind the pin 13 of integrated chip U, pin 10 short circuits, the pin 14 of integrated chip U connects the base stage of triode Q1 by current-limiting resistance R1; Connect the emitter of triode Q2 behind the pin 2 of integrated chip U, pin 5 short circuits, the pin 1 of integrated chip U connects the base stage of triode Q2 by current-limiting resistance R2.Need the battery BT1 of charging to be connected between the earth terminal pin 4 of the emitter of triode Q1 and integrated chip U, the positive pole of BT1 connects the emitter of triode Q1, the minus earth of BT1; Need the battery BT2 of charging to be connected between the earth terminal pin 4 of the emitter of triode Q2 and integrated chip U, the positive pole of BT2 connects the emitter of triode Q2, the minus earth of BT2.
The P district of LED 1 connects the pin 8 of integrated chip U, and the N district connects the earth terminal pin 4 of integrated chip U; The P district of LED 2 connects the pin 7 of integrated chip U, and the N district connects the earth terminal pin 4 of integrated chip U.
Connect contact 1 and the contact 4 of double linkage brake knife switch K behind the pin 12 of integrated chip U, pin 9, pin 3, pin 6 short circuits.Short circuit between the contact 1 of knife switch K and the contact 4, and connect the pin 11 of integrated chip U by divider resistance R6, the LED 3 of connecting between the contact 5 of knife switch K and the earth terminal pin 4 of integrated chip U, the P district of LED 3 connects the contact 5 of knife switch K, and the N district connects the earth terminal pin 4 of integrated chip U.The contact 6 of knife switch K connects the earth terminal pin 4 of integrated chip U by divider resistance R8.
During real work, contact 1 and contact 5 at double linkage brake knife switch K are communicated with, under contact 3 and the situation that contact 6 is communicated with, after powering on, the shallow pulsafeeder of direct current that the 220V alternating current produces after by transformation, rectification, voltage stabilizing, filtering provides the collector electrode of dc pulse electric current to Q1, Q2; And provide the pin 11 of direct-current working volts to integrated chip U, earth terminal pin 4; This direct voltage produces pressure drop on the R6, the LED3 that are connected between the earth terminal pin 4 of integrated chip U, the pin 11 simultaneously.Double linkage brake knife switch K conducting state at this moment makes the two ends pressure drop of LED3 as presetting reference voltage V
1, establishing this reference voltage is V
1, 12 pin that are input to integrated chip U respectively are the input of U4,9 pin are the input of U3; And 3 pin of integrated chip U are the input of U1, and 6 pin are the input of U2.13 pin that are connected on the integrated chip U of BT1 positive pole simultaneously are another input of U4, and 10 pin are another input of U3; And 2 pin that are connected on the integrated chip U of BT2 positive pole are another input of U1, and 5 pin are another input of U2, sampling BT1, the current voltage of BT2, by operational amplifier to the voltage ratio of two inputs, 14 pin at integrated chip U are the output of U4, and be that the suitable Control current of the output output of U1 is to Q1 at 1 pin of integrated chip U, the base stage of Q2, Q1, the emitter of Q2 is exported shallow pulsating direct current charging current and is given BT1, BT2 charges, and be that the output output current of U3 makes LED1 luminous at 8 pin of integrated chip U, at 7 pin of integrated chip U is that the output output current of U2 makes LED2 luminous, is used for pilot cell BT1 respectively, BT2 is in the charging process.Carrying out along with charging process, BT1, the voltage of BT2 increases gradually, also make the pressure reduction between the input of four operational amplifiers among the integrated chip U diminish gradually, thereby the output that makes four operational amplifiers outputs to triode Q1, the electric current of Q2 base stage carries out and changes with charging process, with control Q1, the size of Q2 emitter current, BT1, after BT2 is charged to preset voltage, pressure reduction vanishing between the input of four operational amplifiers among the integrated chip U, the also vanishing of the output current of the output of four operational amplifiers, Q1, the base current vanishing of Q2, Q1, the vanishing thereupon of the emitter current of Q2, to BT1, the charging of BT2 in time stops, LED1, LED2 also extinguishes simultaneously.
Equally, be communicated with contact 6 when double linkage brake knife switch K is in contact 4, contact 2 is during with state that contact 5 is communicated with, and R8 has replaced the position of LED3, and the pressure drop at R8 two ends becomes presets comparative voltage V
2, thereby, as long as by to the reasonable setting of LED3, R8 parameter, just can make to the mutually different alkaline battery V of end of charge voltage
2And nickel chromium triangle/Ni-MH battery V
1When charging, as long as by simple change over switch K, can think that charger presets different final voltages, will never cause undercharge or overcharge, while is along with the conversion of K switch, LED3 is in respectively with R6 connects or vacant state, thereby LED3 is in luminous respectively or the state that extinguishes, thereby play the effect of indicating the current battery types that charges.According to the general knowledge charging reference voltage V of alkaline battery as can be known
1Should be 1.6V, the reference voltage of nickel chromium triangle/Ni-MH battery should be 1.4V.
Though described the utility model with reference to specific embodiment, this description does not mean that and is construed as limiting.With reference to after the description of the present utility model,, obviously can make various corrections to the disclosed embodiments for person skilled in the art.It seems as input current control output current this point from triode, the utility model with base current as the input Control current, but can accommodation be also as the input Control current with emitter current, and the circuit connection of describing among the circuit connection equivalence replacement the utility model embodiment with corresponding correction, similarly correction all falls within the claim scope of the present utility model.
Claims (8)
1, a kind of battery charger, the charging pedestal is by housing and place the circuit with the work of pulse current charge mode of its inside to form, the housing upper surface is provided with for the dimple of placing pond to be charged, be provided with charging port [6] in the dimple, the setting of charging port [6] and make pond to be charged insert dimple with being electrically connected of operating circuit after, can correctly transmit charging current and battery signal between battery and the circuit, described circuit with the work of pulse current charge mode comprises shallow Voltage pulsating direct-current supply generation circuit [1]
It is characterized in that: described circuit with the work of pulse current charge mode also comprises:
Shallow Voltage pulsating direct-current supply generation circuit [1]: alternating current is become the direct current with certain amplitude variation, for adjusting link and operating current being provided, is that reference voltage prewired circuit [2] and sampling comparison circuit [3] provide operating voltage simultaneously;
Reference voltage prewired circuit [2]: the generation circuit that is two kinds of reference voltages;
Sampling comparison circuit [3]:, and compare the output control signal to being recharged the voltage sample of battery with reference voltage;
Charging indication [4]:, control the luminance of one group of indicator light, to represent the operating state of current charger according to the control signal of sampling comparison circuit;
Adjust link [5]: the size that is used to adjust charging current;
The current output terminal mouth of described shallow Voltage pulsating direct-current supply generation circuit [1] is connected with the charge power supply input port of adjusting link [5], and described shallow Voltage pulsating direct-current supply generation circuit [1] voltage output end is connected with the working power input port of reference voltage prewired circuit [2], sampling comparison circuit [3] respectively;
The reference voltage output end of described reference voltage prewired circuit [2] is connected with the reference voltage input of sampling comparison circuit [3]; The sampled voltage input of described sampling comparison circuit [3] is connected with charging port [6] sampled voltage output, and the Control current output of sampling comparison circuit [3] is connected with the Control current input of adjusting link [5] and the current input terminal of charging indication [4].
2, by the described a kind of battery charger of claim 1, it is characterized in that: described shallow Voltage pulsating direct-current supply generation circuit [1] is made up of the bridge rectifier that power transformer [T1] and diode [D1], [D2], [D3], [D4] form, power transformer [T1] becomes required magnitude of voltage with the alternating voltage of AC network 220V, and the bridge rectifier of forming by diode [D1], [D2], [D3], [D4] becomes alternating voltage the direct voltage of pulsation then.
3, by the described a kind of battery charger of claim 1, it is characterized in that: described charging indication [4] is a light-emitting diode [LED1].
4, by the described a kind of battery charger of claim 1, it is characterized in that: described adjustment link [5] is one and adjusts triode [Q1], the collector electrode of [Q1] is connected with the current output terminal of bridge rectifier by current-limiting resistance [R3], and the emitter of [Q1] connects charging port.
5, by the described a kind of battery charger of claim 1, it is characterized in that: described sampling comparison circuit [3] is two operational amplifiers [U3], [U4], the input of [U3], [U4] is a reference voltage input, another input connects the sampled voltage output of charging port, the operating current input of [U3], [U4] is connected with the current output terminal of bridge rectifier by current-limiting resistance [R5], and the output of [U4] is connected with the base stage of [Q1] by current-limiting resistance [R1].
6, by the described a kind of battery charger of claim 1, it is characterized in that: described reference voltage prewired circuit is by divider resistance [R6], [R8], and light-emitting diode [LED3] and double linkage brake knife switch [K] constitute.
7. by the described a kind of battery charger of claim 6, it is characterized in that: described double linkage brake knife switch [K] is when closure state 1, light-emitting diode [LED3] and the operating voltage output that is connected bridge rectifier after resistance [R6] is connected, the tie point of light-emitting diode and resistance [R6] is as reference voltage V
1It is vacant that output and the reference voltage input of sample comparison circuit [3] are connected resistance [R8].
8. by the described a kind of current charges device of claim 6, it is characterized in that: described double linkage brake knife switch [K] is when closure state 2, resistance [R8] is series at the operating voltage output that is connected bridge rectifier with resistance [R6], and the tie point of resistance [R8] and resistance [R6] is as reference voltage V
2Output is connected with the reference voltage input of sampling comparison circuit 3; [LED3] is vacant for light-emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200236355U CN2753037Y (en) | 2004-06-10 | 2004-06-10 | Battery charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200236355U CN2753037Y (en) | 2004-06-10 | 2004-06-10 | Battery charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2753037Y true CN2753037Y (en) | 2006-01-18 |
Family
ID=35914447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200236355U Expired - Fee Related CN2753037Y (en) | 2004-06-10 | 2004-06-10 | Battery charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2753037Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017113065A1 (en) * | 2015-12-28 | 2017-07-06 | 深圳市聚作照明股份有限公司 | Automatic charging circuit and emergency lamp |
| CN110395125A (en) * | 2018-04-20 | 2019-11-01 | 比亚迪股份有限公司 | Self checking method and device, the onboard charger and electric vehicle of onboard charger |
-
2004
- 2004-06-10 CN CNU2004200236355U patent/CN2753037Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017113065A1 (en) * | 2015-12-28 | 2017-07-06 | 深圳市聚作照明股份有限公司 | Automatic charging circuit and emergency lamp |
| CN110395125A (en) * | 2018-04-20 | 2019-11-01 | 比亚迪股份有限公司 | Self checking method and device, the onboard charger and electric vehicle of onboard charger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060118 |