CN204361713U - A kind of lithium battery buffering charging circuit - Google Patents
A kind of lithium battery buffering charging circuit Download PDFInfo
- Publication number
- CN204361713U CN204361713U CN201420796028.6U CN201420796028U CN204361713U CN 204361713 U CN204361713 U CN 204361713U CN 201420796028 U CN201420796028 U CN 201420796028U CN 204361713 U CN204361713 U CN 204361713U
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Abstract
The utility model provides a kind of lithium battery buffering charging circuit, comprises the charge circuit of charger interface, battery interface, connecting charger interface and battery interface, buffering timing circuit and supplementary circuitry; Described charge circuit comprises the low current charge loop be composed in series by diode and current-limiting resistance, also has the large current charge loop be composed in series by the normally opened contact of diode and relay; Described buffering timing circuit is RC timer, controls the closed of large current charge loop repeat circuit normally opened contact by triode; Described supplementary circuitry comprises battery charging voltage detecting unit and makes the supplementary units that in buffering timing circuit, triode disconnects.The utility model beneficial effect is: solve battery under-voltage, crosses and puts to the charging of lithium battery instantaneous large-current under state, and solves lithium electricity battery when large current charge, and void during what the ripple due to charging voltage caused be full of electricity is full; Extend power supply useful life, increase charge and discharge cycles number of times.
Description
Technical field
The utility model belongs to lithium power technique fields, especially relates to a kind of lithium battery buffering charging circuit.
Background technology
In existing technology, in charging process that lithium battery is under-voltage, owing to there is very large pressure reduction between charger and lithium battery, therefore in initial charge process, charging current is large especially, can make the lost of life of lithium battery like this, and the generation of the phenomenon such as temperature overheating.
Utility model content
Problem to be solved in the utility model there is provided the lithium battery buffering charging circuit that a kind of structure is simple, simple to operate, production efficiency is high.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of lithium battery buffering charging circuit, comprises the charge circuit of charger interface, battery interface, connecting charger interface and battery interface, buffering timing circuit and supplementary circuitry;
Described charge circuit comprises the low current charge loop be composed in series by diode and current-limiting resistance, also has the large current charge loop be composed in series by the normally opened contact of diode and relay;
Described buffering timing circuit is RC timer, controls the closed of large current charge loop repeat circuit normally opened contact by triode;
Described supplementary circuitry comprises battery charging voltage detecting unit and makes the supplementary units that in buffering timing circuit, triode disconnects.
Preferably, described charge circuit comprises diode D1, resistance R5, triode Q1, relay K 1, described charger interface, diode D1, resistance R5, battery interface is composed in series low current charge loop, relay K 1 normally opened contact in parallel on resistance R5, make charger interface, diode D1, relay K 1 normally opened contact, battery interface is composed in series large current charge loop, the negative electrode of diode D1 connects relay K 1 by resistance R6, the collector electrode of relay K 1 connecting triode Q1, the emitter of triode Q1 connects battery interface negative pole, the break-make of triode Q1 control relay K1.
Preferably, described buffering timing circuit comprises resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, resistance R4 and electric capacity C1 is all in parallel with the emitter of triode Q1, described resistance R1 one end connects the negative electrode of diode D1, the other end, by the base stage of resistance R3 connecting triode Q1, connects battery interface negative pole by resistance R2.
Preferably, described supplementary circuitry comprises resistance R7, resistance R8 and triode Q2, in parallel with battery interface after resistance R7, resistance R8 series connection, the base stage of the collector connecting transistor Q1 of described triode Q2, emitter connects the emitter of triode Q1, one end of base stage connecting resistance R7.
Preferably, described resistance R6 connects battery interface negative pole by voltage stabilizing didoe D3.
The advantage that the utility model has and good effect are:
Solve battery under-voltage, cross and put to the charging of lithium battery instantaneous large-current under state, and solve lithium electricity battery when large current charge, void during what the ripple due to charging voltage caused be full of electricity is full;
Extend power supply useful life, increase charge and discharge cycles number of times, electric discharge increases, and improves the fail safe of power supply, failure rate is low, convenient operation etc.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the utility model is elaborated.
The core concept of the technical program is that the time delays that make use of RC buffer circuit carries out switching charging to lithium battery current.When large current charge is full of, is in empty full because big current can cause the ripple of cell voltage to add ambassador's battery, and stops charging.The technical program is by resistance current limliting, and relay exchanges the switching realizing current, also has small area analysis to supplement electricity.
A kind of lithium battery buffering charging circuit, comprises the charge circuit of charger interface, battery interface, connecting charger interface and battery interface, buffering timing circuit and supplementary circuitry;
Described charge circuit comprises diode D1, resistance R5, triode Q1, relay K 1, described charger interface, diode D1, resistance R5, battery interface is composed in series low current charge loop, relay K 1 normally opened contact in parallel on resistance R5, make charger interface, diode D1, relay K 1 normally opened contact, battery interface is composed in series large current charge loop, the negative electrode of diode D1 connects relay K 1 by resistance R6, the collector electrode of relay K 1 connecting triode Q1, the emitter of triode Q1 connects battery interface negative pole, the break-make of triode Q1 control relay K1,
Described buffering timing circuit comprises resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, resistance R4 and electric capacity C1 is all in parallel with the emitter of triode Q1, described resistance R1 one end connects the negative electrode of diode D1, the other end, by the base stage of resistance R3 connecting triode Q1, connects battery interface negative pole by resistance R2; Charger voltage is charged to electric capacity C1 by resistance R1, resistance R2, resistance R3, resistance R4, and electric capacity C1 is connected to the control end of triode Q1, utilizes RC to make timer to the electric control carrying out buffer time of lithium;
Described supplementary circuitry comprises resistance R7, resistance R8 and triode Q2, in parallel with battery interface after resistance R7, resistance R8 series connection, the base stage of the collector connecting transistor Q1 of described triode Q2, emitter connects the emitter of triode Q1, one end of base stage connecting resistance R7, realize the voltage that triode Q2 controls triode Q1, thus control relay K1, realize after lithium battery big current is full of, change into small area analysis and supplement electricity.
The course of work is as follows:
Charger voltage is by resistance R1, resistance R2, resistance R3, resistance R4 charges to electric capacity C1, utilizes RC to make timer to the electric determination carrying out buffer time of lithium, when the voltage charged reaches the condition of triode Q1 conducting, relay K 1 adhesive, not by resistance R5, charger is directly to lithium cell charging, and charger directly carries out large current charge to lithium battery;
When being about to be full of, cell voltage state is detected by resistance R7 and resistance R8, controlling triode Q2 conducting makes relay K 1 disconnect, by resistance R5 current limliting, recover low current charge, exchanged by relay K 1 and realize the switching of current, thus reach lithium battery and be converted to large current charge by initial low current charge, be full of by big current and be converted to the effect that small area analysis supplements electricity again.
Above an embodiment of the present utility model has been described in detail, but described content being only preferred embodiment of the present utility model, can not being considered to for limiting practical range of the present utility model.All equalizations done according to the utility model application range change and improve, and all should still belong within patent covering scope of the present utility model.
Claims (5)
1. a lithium battery buffering charging circuit, is characterized in that: comprise the charge circuit of charger interface, battery interface, connecting charger interface and battery interface, buffering timing circuit and supplementary circuitry;
Described charge circuit comprises the low current charge loop be composed in series by diode and current-limiting resistance, also has the large current charge loop be composed in series by the normally opened contact of diode and relay;
Described buffering timing circuit is RC timer, controls the closed of large current charge loop repeat circuit normally opened contact by triode;
Described supplementary circuitry comprises battery charging voltage detecting unit and makes the supplementary units that in buffering timing circuit, triode disconnects.
2. lithium battery buffering charging circuit according to claim 1, it is characterized in that: described charge circuit comprises diode D1, resistance R5, triode Q1, relay K 1, described charger interface, diode D1, resistance R5, battery interface is composed in series low current charge loop, relay K 1 normally opened contact in parallel on resistance R5, make charger interface, diode D1, relay K 1 normally opened contact, battery interface is composed in series large current charge loop, the negative electrode of diode D1 connects relay K 1 by resistance R6, the collector electrode of relay K 1 connecting triode Q1, the emitter of triode Q1 connects battery interface negative pole, the break-make of triode Q1 control relay K1.
3. lithium battery buffering charging circuit according to claim 2, it is characterized in that: described buffering timing circuit comprises resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, resistance R4 and electric capacity C1 is all in parallel with the emitter of triode Q1, described resistance R1 one end connects the negative electrode of diode D1, the other end, by the base stage of resistance R3 connecting triode Q1, connects battery interface negative pole by resistance R2.
4. lithium battery buffering charging circuit according to claim 3, it is characterized in that: described supplementary circuitry comprises resistance R7, resistance R8 and triode Q2, in parallel with battery interface after resistance R7, resistance R8 series connection, the base stage of the collector connecting transistor Q1 of described triode Q2, emitter connects the emitter of triode Q1, one end of base stage connecting resistance R7.
5. lithium battery buffering charging circuit according to claim 2, is characterized in that: described resistance R6 connects battery interface negative pole by voltage stabilizing didoe D3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420796028.6U CN204361713U (en) | 2014-12-16 | 2014-12-16 | A kind of lithium battery buffering charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420796028.6U CN204361713U (en) | 2014-12-16 | 2014-12-16 | A kind of lithium battery buffering charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204361713U true CN204361713U (en) | 2015-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420796028.6U Expired - Fee Related CN204361713U (en) | 2014-12-16 | 2014-12-16 | A kind of lithium battery buffering charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204361713U (en) |
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2014
- 2014-12-16 CN CN201420796028.6U patent/CN204361713U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20171216 |
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| CF01 | Termination of patent right due to non-payment of annual fee |