CN204046243U - A kind of lithium battery depassivation circuit - Google Patents
A kind of lithium battery depassivation circuit Download PDFInfo
- Publication number
- CN204046243U CN204046243U CN201420513922.8U CN201420513922U CN204046243U CN 204046243 U CN204046243 U CN 204046243U CN 201420513922 U CN201420513922 U CN 201420513922U CN 204046243 U CN204046243 U CN 204046243U
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- China
- Prior art keywords
- lithium battery
- circuit
- resistance
- oxide
- metal
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- 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.)
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Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 50
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000004065 semiconductor Substances 0.000 claims description 18
- 238000002161 passivation Methods 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- SOZVEOGRIFZGRO-UHFFFAOYSA-N [Li].ClS(Cl)=O Chemical compound [Li].ClS(Cl)=O SOZVEOGRIFZGRO-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model relates to instrument power supply field, particularly a kind of lithium battery depassivation circuit.Comprise the discharge circuit for discharging to lithium battery, for the control port of reception control signal and the differential circuit for processing control signal.This circuit by periodically to lithium battery electric discharge, prevent lithium battery because of for a long time need not and produce passivation layer.And there is differential circuit discharge circuit is protected, receive high level even if long-time and open signal and also can not discharge to lithium battery always.
Description
Technical field
The utility model relates to instrument power supply field, particularly a kind of lithium battery depassivation circuit.
Background technology
?the supply power mode of current civilian wireless gas meter mainly contains dry cell power supply and lithium battery two kinds of modes, dry cell power supply is adopted then to need to regularly replace battery, when dry cell is under-voltage or do not have electricity, gas meter, flow meter is valve-embedded and stop the supple of gas or steam by closedown, ability continuation gas after the battery that user must more renew, concerning certain customers, often change battery inconvenient.Simultaneously when dry cell is under-voltage or do not have electricity, gas company cannot carry out radio meter register, and gas company promptly and accurately can not grasp the use information of table tool.Adopt lithium battery power supply, the useful life due to gas meter, flow meter requires to be not less than 10 years usually, requires high to the performance and used life of lithium battery.Owing to using the work of lithium battery power supply support matrix tool ultra-long time, can ensure that gas company regularly carries out wireless telecommunications with gas meter, flow meter like this, promptly and accurately grasp the use information showing tool.Owing to driving built-in valve of gas meter power consumption relatively large, and by gas company's remote operation Valve controlling, therefore generally use the wireless gas meter of lithium battery power supply not to be with valve-embedded, when subscriber arrearage or for a long time need not, gas company can not effectively manage.Therefore the gas meter, flow meter of dry cell and lithium battery dual power supply is adopted, both can ensure gas company permanently effective carry out radio meter register, also can ensure that gas company carries out remote valve gate control, but during due to employing dual power supply, normally dry cell is as main power source, lithium battery is as stand-by power supply, lithium battery is automatically switched to when dry cell is invalid, if dry cell is permanently effective, and the Acceptable life of general dry cell is all no less than 6 months, even more than 1 year, such lithium battery was in long-term without state.General gas meter, flow meter lithium battery used is all lithium thionyl chloride cell, the battery of the type can provide the highest energy Ratios and voltage, extraordinary temperature characterisitic and minimum self discharge, but when the long-term not used time, one deck passivating film will be formed gradually on lithium battery interior lithium surface, time is longer, and passivating film is thicker.Form passivating film, can ensure that lithium battery storage life is long, but exceed certain time limit, all need depassivation process before use, otherwise cannot larger current be released.Some lithium battery producer coordinates its proprietary complex capacitance technology can effectively solve this problem, but a lot of lithium battery producer only provides lithium battery separately, all needs user to try every possible means in addition to solve the long-term no Passivation Treatment of lithium battery.
Utility model content
Goal of the invention of the present utility model is: for above Problems existing, a kind of lithium battery depassivation circuit is provided, comprise the discharge circuit for discharging to lithium battery, for the control port of reception control signal and the differential circuit for processing control signal.
Further, described differential circuit comprises the first electric capacity and the first resistance, one end of described first electric capacity is connected with described control port, the other end of described first electric capacity is the output of described differential circuit, described output is connected with one end of described first resistance and the control end of described discharge circuit simultaneously, the other end ground connection of described first resistance.
Further, described discharge circuit comprises lithium battery, the second resistance and the first metal-oxide-semiconductor switch; The positive pole of described lithium battery is connected with one end of the second resistance, the other end of described second resistance is connected with the drain electrode of described first metal-oxide-semiconductor switch, the source electrode of described first metal-oxide-semiconductor switch is connected with the negative pole of lithium battery and ground connection, and the grid of described first metal-oxide-semiconductor switch is connected with the output of described differential circuit.
During work, the described control port cycle receive high level signal and low level signal, in same period, send the low level signal time is greater than transmission high level time.When described control port receives low level signal, described first metal-oxide-semiconductor switch OFF, discharge circuit does not work, when described control port receives high level signal, in the ascent stage of high level signal, differential circuit can export the high level pulse of one fixed width according to the time constant RC of this circuit, now described first metal-oxide-semiconductor switch connection, discharge circuit works, and lithium battery discharges.Because described differential circuit only can export the high level pulse with one fixed width when input receives the ascent stage of high level, even if therefore described control port receives high level signal always, described first metal-oxide-semiconductor switch also can not be in opening state always.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
1, periodically to lithium battery electric discharge, prevent lithium battery because of for a long time need not and produce passivation layer.
2, there is differential circuit, even if cause described control port to receive high level for a long time because of circuit other reasons, also can not produce the situation that lithium battery discharges always and occur.
Accompanying drawing explanation
Fig. 1 is block diagram of the present utility model.
Fig. 2 is the circuit diagram of the utility model embodiment 1.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, 2, the present embodiment provides a kind of lithium battery depassivation treatment circuit, comprises the discharge circuit 3 for discharging to lithium battery, for the control port 1 of receiving key control signal and the differential circuit 2 for processing control signal.
Further, described differential circuit 2 comprises the first electric capacity C1 and the first resistance R1, one end of described first electric capacity C1 is connected with described control port con1, the other end of described first electric capacity C1 is the output of described differential circuit 2, described output is connected with described one end of first resistance R1 and the control end of described discharge circuit 3 simultaneously, the other end ground connection of described first resistance R1.
Further, described discharge circuit 3 comprises lithium battery, the second resistance R2 and the first metal-oxide-semiconductor switch Q1; The positive pole of described lithium battery is connected with one end of the second resistance R2, the other end of described second resistance R2 is connected with the drain electrode of described first metal-oxide-semiconductor switch Q1, the source electrode of described first metal-oxide-semiconductor switch Q1 is connected with the negative pole of lithium battery and ground connection, and the grid of described first metal-oxide-semiconductor switch Q1 is connected with the output of described differential circuit 2.
During work, described control port 1 cycle receive high level signal and low level signal.When described control port 1 receives low level signal, described first metal-oxide-semiconductor Q1 switch OFF, discharge circuit 3 does not work, when described control port 1 receives high level signal, in the ascent stage of high level signal, differential circuit 2 can export the high impulse of one fixed width according to the time constant RC of this circuit, now described first metal-oxide-semiconductor Q1 switch connection, discharge circuit 3 works, and lithium battery discharges.Because differential circuit 2 meetings export the high level pulse with one fixed width when input receives the ascent stage of high level, even if therefore described control port 1 receives high level signal always, described first metal-oxide-semiconductor Q1 switch also can not be in opening state always.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
1, periodically to lithium battery electric discharge, prevent lithium battery because of for a long time need not and produce passivation layer.
2, there is differential circuit, even if cause described control port to receive high level for a long time because of circuit other reasons, also can not produce the situation that lithium battery discharges always and occur.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (3)
1. a lithium battery depassivation circuit, is characterized in that, comprises the discharge circuit for discharging to lithium battery, for the control port of reception control signal and the differential circuit for processing control signal.
2. lithium battery depassivation circuit according to claim 1, it is characterized in that, described differential circuit comprises the first electric capacity and the first resistance, one end of described first electric capacity is connected with described control port, the other end of described first electric capacity is the output of described differential circuit, described output is connected with one end of described first resistance and the control end of described discharge circuit simultaneously, the other end ground connection of described first resistance.
3. lithium battery depassivation circuit according to claim 1 and 2, is characterized in that, described discharge circuit comprises lithium battery, the second resistance and the first metal-oxide-semiconductor switch; The positive pole of described lithium battery is connected with one end of the second resistance, the other end of described second resistance is connected with the drain electrode of described first metal-oxide-semiconductor switch, the source electrode of described first metal-oxide-semiconductor switch is connected with the negative pole of lithium battery and ground connection, and the grid of described first metal-oxide-semiconductor switch is connected with the output of described differential circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420513922.8U CN204046243U (en) | 2014-09-09 | 2014-09-09 | A kind of lithium battery depassivation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420513922.8U CN204046243U (en) | 2014-09-09 | 2014-09-09 | A kind of lithium battery depassivation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204046243U true CN204046243U (en) | 2014-12-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420513922.8U Expired - Lifetime CN204046243U (en) | 2014-09-09 | 2014-09-09 | A kind of lithium battery depassivation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204046243U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167802A (en) * | 2014-09-09 | 2014-11-26 | 成都千嘉科技有限公司 | Lithium battery depassivation circuit and method |
-
2014
- 2014-09-09 CN CN201420513922.8U patent/CN204046243U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167802A (en) * | 2014-09-09 | 2014-11-26 | 成都千嘉科技有限公司 | Lithium battery depassivation circuit and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 536, Section 1, airport 1st Road, Shuangliu Southwest Airport, Chengdu, Sichuan 610211 Patentee after: Chengdu Qianjia Technology Co.,Ltd. Address before: No. 536, Section 1, airport 1st Road, Shuangliu Southwest Airport, Chengdu, Sichuan 610211 Patentee before: Chengdu Qianjia Technology Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141224 |
|
| CX01 | Expiry of patent term |