CN2768276Y - Stabilized voltage output circuit for chargeable battery - Google Patents
Stabilized voltage output circuit for chargeable battery Download PDFInfo
- Publication number
- CN2768276Y CN2768276Y CN 200420095559 CN200420095559U CN2768276Y CN 2768276 Y CN2768276 Y CN 2768276Y CN 200420095559 CN200420095559 CN 200420095559 CN 200420095559 U CN200420095559 U CN 200420095559U CN 2768276 Y CN2768276 Y CN 2768276Y
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- Prior art keywords
- circuit
- voltage
- battery
- output
- rechargeable battery
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Abstract
The utility model relates to a stabilized voltage output circuit for a chargeable battery, which comprises at least one chargeable battery, wherein a sampling input end of a DC/DC converter is connected to an output circuit of the chargeable battery and samples the battery voltage, and the control output end of the DC/DC converter is connected to a switching circuit which is connected in series with the output circuit of the battery. The DC/DC converter can control the conduction or cut-off of the switching circuit according to the sampling battery voltage to control the conduction or cut-off of the circuit. The circuit also comprises an over charge protection circuit, an overcurrent protection circuit and an overdischarge protection circuit.
Description
[technical field]
The utility model is a kind of protective circuit of rechargeable battery, and particularly a kind of lithium rechargeable battery to heavy-current discharge carries out additives for overcharge protection, over, a kind of circuit of overcurrent protection and voltage stabilizing output.
[background technology]
Along with development of science and technology, increasing portable set is developed out, these equipment all need a kind of power supply of reliable energy storage to cooperate, some equipment needs one to stablize and the bigger power supply of output current, as PDA, game machine, camera, flashlight etc., these equipment adopt electric current bigger usually, export stable disposable battery, but disposable battery can not recycle, cause use cost to increase and environmental pollution, this just needs to adopt power supply capable of circulation come the substituting disposable battery to use, and in the present power supply that can be recycled the lithium rechargeable battery of performance the best after a period of time is used in the macrocell discharge, its output voltage can reduce gradually, and a stable output voltage can not be provided.
[utility model content]
Technical problem to be solved in the utility model provides the voltage-stabilizing output circuit of rechargeable battery a kind of simple in structure, with low cost.
Another technical problem to be solved in the utility model is a kind of can be practical chargeable, overdischarge to be provided, to cross the circuit of the protection of battery for above-mentioned rechargeable battery.
For solving the problems of the technologies described above, technical solutions of the utility model are:
A kind of voltage-stabilizing output circuit of rechargeable battery, comprise at least one rechargeable battery, the sampling input of a DC/DC transducer is connected to the voltage of the output loop of described rechargeable battery and the battery of sampling, the control output end of this DC/DC transducer is connected to a switching circuit, this switching circuit is connected on the output loop of above-mentioned battery, this DC/DC transducer can according to the cell voltage that samples come the control switch circuit by or conducting, and then the control circuit loop by or conducting.
Described switching circuit is a field effect transistor, and its grid is connected to the control output end of DC/DC transducer, and its source electrode and drain electrode are connected in series to the output loop of battery.
Further improvement of the utility model is to be in series with overcurrent protector PTC on the electric core of described battery.
Further improvement of the utility model is that the both positive and negative polarity of described battery also is provided with and one overcharges, crosses and put and overcurrent protection chip and switching circuit; this overcharges, mistake is put and overcurrent protection chip sampling cell voltage; and according to the voltage that samples come the control switch circuit by or conducting, thereby realize overcharging, cross and put and overcurrent protection.
Further improvement of the utility model is only to insert in its charging input circuit to overcharge, cross and put and the current foldback circuit part, and discharge output loop Lu inserts the voltage stabilizing circuit part simultaneously and overcharge, cross and put and the current foldback circuit part.
Advantage of the present utility model is: need use in the equipment of the disposable battery that electric current is big, output is stable at some, by adopting the voltage-stabilizing output circuit of the utility model rechargeable battery, thereby realize substituting non-rechargeabel primary cell with the secondary cell of charging capable of circulation, save use cost greatly, reduced environmental pollution.
In conjunction with example the utility model is further described with reference to the accompanying drawings.
[description of drawings]
Fig. 1 is the theory diagram of the utility model rechargeable battery voltage-stabilizing output circuit.
Fig. 2 is the circuit diagram of a kind of embodiment of the utility model rechargeable battery voltage-stabilizing output circuit.
[embodiment]
Please refer to Fig. 1, the utility model mainly comprises battery pack 1, is respectively equipped with to overcharge, cross and put and current foldback circuit 2 and voltage-stabilizing output circuit 3 on battery pack, is provided with a pair of charging input end 4 and a pair of discharge output 5 at the battery pack two ends.Describedly overcharge, mistake is put and the sampling end of current foldback circuit 2 connects each battery; describedly overcharge, mistake is put and the control end of current foldback circuit 2 is connected with switching circuit 6,7, this switching circuit 6,7 is connected on the input/output terminal of battery pack and controls the conducting or the shutoff of battery pack.The control output end of this voltage-stabilizing output circuit 3 connects a switching circuit 8, and this switching circuit 8 is connected on another discharge output 4.
Please refer to Fig. 2, this circuit diagram is a kind of embodiment of the present invention.
Two electric cores and two overcurrent protector PTC series connection, the hidden danger that this overcurrent protector PTC directly links to each other with electric core and can avoid structure fit on short circuit etc. to cause, the electric core of avoiding overcurrent to cause the most reliably damages and danger.
Usedly in the present embodiment overcharge, cross and put and S8232 that the overcurrent protection chip is produced for Seiko company; its VSS end is connected the negative pole of battery pack; its VC and VCC carry out voltage sample by resistance R 1, R2 to two batteries respectively; be provided with a capacitor C 1 between VC and VCC; the anode that is provided with a capacitor C 2, the first electric cores between VC and electric core negative pole just is being connected to charger input anode, voltage stabilizing part input as output.The negative terminal of the second electric core is connected to capacitor C 2 one ends, S8232 power supply negative terminal, delay capacitor C3 one end and over field effect transistor Q1 source electrode.Two control end D0 ends of chip S8232 are connected over field effect transistor Q1 grid and additives for overcharge protection field effect transistor Q2 grid respectively with the C0 end, and the VM end is connected with resistance R 3 one ends, and the SENS end is connected with resistance R 4 other ends.The field effect transistor of overcharging Q2 drain electrode should be managed the Q1 drain electrode with the overdischarge field and is connected, and source electrode is connected with resistance R 3 other ends, the R5 other end, and is connected to charger negative terminal and voltage stabilizing part input as output.
Overcharge under normal at electric core voltage, as to flow through the loop electric current normal condition, cross and put and D0, the C0 end of overcurrent protection chip S8232 is all exported high level and made to let slip and fill the equal conducting of field effect transistor Q2, Q3.Overcharge; cross and put and overcurrent protection chip S8232 is respectively by VCC and VC; voltage sampling between VC and VSS is understood two electric core magnitudes of voltage; be the voltage of VSS end to be understood current in loop by monitoring that VM holds; when when charging VM to VSS voltage be on the occasion of; VM is a negative value to VSS voltage when discharge; overcharge; cross put and overcurrent protection chip S8232 by detected magnitude of voltage; the duration of current value and abnormal voltage electric current compares with internal reference, and the condition that reaches is sent a signal by control end at once makes a corresponding field effect transistor turn-off protective effect.
The voltage stabilizing output is made up of voltage-dropping type DC/DC transducer, coupled field effect transistor, Resistor-Capacitor Unit, and the voltage-dropping type DC/DC transducer that is adopted in the present embodiment is the Japanese Te Luoshi generation chip XC9201 of company.Its EXT end links to each other with field effect transistor Q3 grid; ISEN end and field effect transistor Q3 drain electrode; protection part output plus terminal; capacitor C 4 one ends; capacitor C 5 one ends; resistance R 6 one ends; capacitor C 7 one ends; the IC2VIN end links to each other; its CESS end and resistance R 6 other ends; capacitor C 6 one ends link to each other; CLK end and resistance R 7 one ends; capacitor C 8 one ends link to each other; GAIN one end links to each other with capacitor C 9; FB end and resistance R 8 one ends; resistance R 9 one ends; capacitor C 10 1 ends link to each other; field effect transistor Q3 source electrode and voltage-stabiliser tube SD negative electrode; inductance L one end links to each other; the inductance L and the C10 other end; the R8 other end; capacitor C 11 1 ends; capacitor C 12 1 ends and output are connected, capacitor C 11 other ends; capacitor C 11 other ends; resistance R 9 other ends; the IC2VSS end; capacitor C 8 other ends; capacitor C 9 other ends; resistance R 7 other ends; capacitor C 7 other ends; capacitor C 6 other ends; capacitor C 5 other ends; capacitor C 4 other ends; resistance R 3 other ends; resistance R 5 other ends; field effect transistor Q2 source electrode and output negative terminal are connected.
On major loop, add overcurrent protection that suitable sample resistance can utilize IC2 inside between the ISEN of chip XC9201 and VIN and avoid that electric current is excessive in the loop shields; adopt direct short-circuit not select this function for use at this; because existing double overcurrent protection function in the utility model, i.e. the overcurrent protection of PTC and overcharge, mistake is put and the overcurrent protection of overcurrent protection chip S8232.Capacitor C 8, resistance R 7 combine and can set the switching frequency of clock frequency and then control field effect transistor Q3; Suitably select suitable resistance R8, R9 can set output voltage values, according to formula Vout=0.9X (R8+R9)/R9.Need be not more than 1M for reducing power consumption, R8, R9 sum, this R8 can be set respectively, the R9 resistance is 680K, 120K.
Two charging input end charge+, charge-of the utility model circuit connecting circuit when charging, whole like this voltage stabilizing output just is not connected in the circuit, is need overcharge, cross and put and overcurrent protection subparticipation work.
Two discharge output output+, output-of the utility model circuit connecting circuit when discharge, the voltage stabilizing output just is connected in the circuit like this, controls its work by switch element Q3.
Claims (5)
1. the voltage-stabilizing output circuit of a rechargeable battery, comprise at least one rechargeable battery, it is characterized in that: the sampling input of a DC/DC transducer is connected to the voltage of the output loop of described rechargeable battery and the battery of sampling, the control output end of this DC/DC transducer is connected to a switching circuit, this switching circuit is connected on the output loop of above-mentioned battery, and this DC/DC transducer can come ending or conducting of control switch circuit according to the cell voltage that samples.
2. according to the voltage-stabilizing output circuit of the described rechargeable battery of claim 1, it is characterized in that: described switching circuit is a field effect transistor, and its grid is connected to the control output end of DC/DC transducer, and its source electrode and drain electrode are connected in series to the output loop of battery.
3. according to the voltage-stabilizing output circuit of the described rechargeable battery of claim 1, it is characterized in that: be in series with overcurrent protector PTC on the electric core of described battery.
4. according to the voltage-stabilizing output circuit of the described rechargeable battery of claim 1; it is characterized in that: the both positive and negative polarity of described battery also is provided with one and overcharges, crosses and put and overcurrent protection chip and switching circuit; this overcharges, mistake is put and overcurrent protection chip sampling cell voltage; and according to the voltage that samples come the control switch circuit by or conducting, thereby realize overcharging, cross and put and overcurrent protection.
5. according to the voltage-stabilizing output circuit of the described rechargeable battery of claim 4; it is characterized in that: only insert in its charging input circuit and overcharge, cross and put and the current foldback circuit part, and discharge output loop Lu inserts the voltage stabilizing circuit part simultaneously and overcharge, cross and put and the current foldback circuit part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420095559 CN2768276Y (en) | 2004-11-16 | 2004-11-16 | Stabilized voltage output circuit for chargeable battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420095559 CN2768276Y (en) | 2004-11-16 | 2004-11-16 | Stabilized voltage output circuit for chargeable battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2768276Y true CN2768276Y (en) | 2006-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420095559 Expired - Lifetime CN2768276Y (en) | 2004-11-16 | 2004-11-16 | Stabilized voltage output circuit for chargeable battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2768276Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102695316A (en) * | 2012-06-11 | 2012-09-26 | 抚顺矿灯制造总厂 | Series-connection current limiting circuit of miner lamp intrinsic safety power supply |
| WO2012139479A1 (en) * | 2011-04-12 | 2012-10-18 | Hu Jiankun | Rechargeable battery, nested battery and remote controller |
-
2004
- 2004-11-16 CN CN 200420095559 patent/CN2768276Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012139479A1 (en) * | 2011-04-12 | 2012-10-18 | Hu Jiankun | Rechargeable battery, nested battery and remote controller |
| CN102695316A (en) * | 2012-06-11 | 2012-09-26 | 抚顺矿灯制造总厂 | Series-connection current limiting circuit of miner lamp intrinsic safety power supply |
| CN102695316B (en) * | 2012-06-11 | 2014-03-19 | 抚顺矿灯制造总厂 | Series-connection current limiting circuit of miner lamp intrinsic safety power supply |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141116 Granted publication date: 20060329 |