CN203983967U - Be applicable to the over circuit of Li-Ion rechargeable battery system - Google Patents
Be applicable to the over circuit of Li-Ion rechargeable battery system Download PDFInfo
- Publication number
- CN203983967U CN203983967U CN201420370192.0U CN201420370192U CN203983967U CN 203983967 U CN203983967 U CN 203983967U CN 201420370192 U CN201420370192 U CN 201420370192U CN 203983967 U CN203983967 U CN 203983967U
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- Prior art keywords
- rechargeable battery
- ion rechargeable
- circuit
- effect transistor
- field effect
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Protection Of Static Devices (AREA)
Abstract
The utility model discloses a kind of over circuit that is applicable to Li-Ion rechargeable battery system; comprise low pressure detecting unit and switch element; described low pressure detecting unit is provided with the reset IC circuit of capable of regulating over charge threshold level; described low pressure detecting unit connects Li-Ion rechargeable battery; magnitude of voltage and the described protection charge threshold level of contrast Li-Ion rechargeable battery; and export different signals to described switch element according to the difference of comparing result, described switch element is according to the unblanking receiving/the close power supply of lithium ion battery.Adopt simple reset IC circuit design; the complicated privacy protection circuit reduction using compared to existing technology the design of circuit; reduced cost; also can to the protection charge threshold level of battery over-discharge, adjust according to different actual conditions simultaneously; better to protect Li-Ion rechargeable battery, improve the useful life of battery.
Description
Technical field
The utility model relates to a kind of battery protecting circuit, particularly a kind of over circuit that is applicable to Li-Ion rechargeable battery system.
Background technology
In Li-Ion rechargeable battery power supply process, if battery electric quantity is to a certain extent low, still continue electric discharge, understand the overdischarge because of battery, and cause permanent damage, cause battery to charge, the battery that can only more renew, the useful life of having reduced battery.Battery over-discharge protection circuit is a kind of in the situation that battery discharge reaches certain threshold value, avoids battery over-discharge, thus a kind of circuit that battery is protected.In the prior art, battery over-discharge protection circuit mostly adopts complicated privacy protection circuit, and cost is higher, once and the setting of the protection charge threshold level of battery over-discharge, can not adjust.
Utility model content
For solving existing problem in above-mentioned prior art, the utility model provides a kind of over circuit that is applicable to Li-Ion rechargeable battery system.
The utility model adopts following technical scheme to realize:
A kind of over circuit that is applicable to Li-Ion rechargeable battery system; comprise low pressure detecting unit and switch element; described low pressure detecting unit is provided with the reset IC circuit of capable of regulating over charge threshold level; described low pressure detecting unit connects Li-Ion rechargeable battery; magnitude of voltage and the described protection charge threshold level of contrast Li-Ion rechargeable battery; and export different signals to described switch element according to the difference of comparing result, described switch element is according to the unblanking receiving/the close power supply of lithium ion battery.
The above-mentioned over circuit that is applicable to Li-Ion rechargeable battery system, wherein: described low pressure detecting unit also comprises electrochemical capacitor, described switch element comprises the first resistance, the second resistance, the first metal-oxide half field effect transistor and the second metal-oxide half field effect transistor, the positive pole of described electrochemical capacitor, the power end of described reset IC circuit, one end of described the second resistance is connected the positive pole of Li-Ion rechargeable battery with the source electrode of described the first metal-oxide half field effect transistor, the negative pole of described electrochemical capacitor connects negative pole the ground connection of Li-Ion rechargeable battery, the output of described reset IC circuit connects one end of described the first resistance, the other end of described the first resistance connects the grid of described the second metal-oxide half field effect transistor, the source ground of described the second metal-oxide half field effect transistor, the other end of described the second resistance is connected the drain electrode of described the second metal-oxide half field effect transistor with the grid of described the first metal-oxide half field effect transistor, the drain electrode of described the first metal-oxide half field effect transistor connects voltage regulation unit.
The utlity model has following beneficial effect: adopt simple reset IC circuit design; the complicated privacy protection circuit reduction using compared to existing technology the design of circuit; reduced cost; also can to the protection charge threshold level of battery over-discharge, adjust according to different actual conditions simultaneously; better to protect Li-Ion rechargeable battery, improve the useful life of battery.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of the utility model embodiment;
Fig. 2 is the circuit theory diagrams of the utility model embodiment.
Embodiment
Shown in Fig. 1 and Fig. 2, the over circuit 100 of the Li-Ion rechargeable battery system that is applicable to of the utility model embodiment comprises low pressure detecting unit 101 and switch element 102, low pressure detecting unit 101 comprises the reset IC circuit U 2 of electrochemical capacitor E2 and capable of regulating battery over-discharge protection charge threshold level, switch element 102 comprises the first resistance R 1, the second resistance R 2, the first metal-oxide half field effect transistor T1 and the second metal-oxide half field effect transistor T2, the positive pole of electrochemical capacitor E2, the power end of reset IC circuit U 2, one end of the second resistance R 2 is connected the positive pole of Li-Ion rechargeable battery 200 with the source electrode of the first metal-oxide half field effect transistor T1, the negative pole of electrochemical capacitor E2 connects negative pole the ground connection of Li-Ion rechargeable battery 200, the output of reset IC circuit U 2 connects one end of the first resistance R 1, the other end of the first resistance R 1 connects the grid of the second metal-oxide half field effect transistor T2, the source ground of the second metal-oxide half field effect transistor T2, the other end of the second resistance R 2 is connected the drain electrode of the second metal-oxide half field effect transistor T2 with the grid of the first metal-oxide half field effect transistor T1, the drain electrode of the first metal-oxide half field effect transistor T1 connects voltage regulation unit 300.Reset IC circuit U 2 contrasts the protection charge threshold level of the battery over-discharge of the magnitude of voltage of the Li-Ion rechargeable battery collecting 200 and 2 settings of reset IC circuit U, when the magnitude of voltage of Li-Ion rechargeable battery 200 is more than or equal to the protection charge threshold level of the battery over-discharge that reset IC circuit U 2 sets, reset IC circuit U 2 outputs level signals, trigger the first metal-oxide half field effect transistor T1 conducting, Li-Ion rechargeable battery 200 normal power supplies, when the magnitude of voltage of Li-Ion rechargeable battery 200 is less than the protection charge threshold level of the battery over-discharge that reset IC circuit U 2 sets, the 2 outputs level signals upsets of reset IC circuit U, trigger the first metal-oxide half field effect transistor T1 cut-off, Li-Ion rechargeable battery 200 is closed power supply, thereby avoid Li-Ion rechargeable battery 200 overdischarge.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses, the variation that can expect easily or replacement, all should be encompassed in protection range of the present utility model in.Therefore, protection range of the present utility model should be as the criterion with the protection range that claim was defined.
Claims (2)
1. an over circuit that is applicable to Li-Ion rechargeable battery system; it is characterized in that: comprise low pressure detecting unit and switch element; described low pressure detecting unit is provided with the reset IC circuit of capable of regulating over charge threshold level; described low pressure detecting unit connects Li-Ion rechargeable battery; magnitude of voltage and the described protection charge threshold level of contrast Li-Ion rechargeable battery; and export different signals to described switch element according to the difference of comparing result, described switch element is according to the unblanking receiving/the close power supply of lithium ion battery.
2. the over circuit that is applicable to Li-Ion rechargeable battery system according to claim 1, it is characterized in that: described low pressure detecting unit also comprises electrochemical capacitor, described switch element comprises the first resistance, the second resistance, the first metal-oxide half field effect transistor and the second metal-oxide half field effect transistor, the positive pole of described electrochemical capacitor, the power end of described reset IC circuit, one end of described the second resistance is connected the positive pole of Li-Ion rechargeable battery with the source electrode of described the first metal-oxide half field effect transistor, the negative pole of described electrochemical capacitor connects negative pole the ground connection of Li-Ion rechargeable battery, the output of described reset IC circuit connects one end of described the first resistance, the other end of described the first resistance connects the grid of described the second metal-oxide half field effect transistor, the source ground of described the second metal-oxide half field effect transistor, the other end of described the second resistance is connected the drain electrode of described the second metal-oxide half field effect transistor with the grid of described the first metal-oxide half field effect transistor, the drain electrode of described the first metal-oxide half field effect transistor connects voltage regulation unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420370192.0U CN203983967U (en) | 2014-07-04 | 2014-07-04 | Be applicable to the over circuit of Li-Ion rechargeable battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420370192.0U CN203983967U (en) | 2014-07-04 | 2014-07-04 | Be applicable to the over circuit of Li-Ion rechargeable battery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203983967U true CN203983967U (en) | 2014-12-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420370192.0U Expired - Fee Related CN203983967U (en) | 2014-07-04 | 2014-07-04 | Be applicable to the over circuit of Li-Ion rechargeable battery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203983967U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417086A (en) * | 2019-07-26 | 2019-11-05 | 深圳微步信息股份有限公司 | A kind of reset control circuit and mobile terminal of battery over-discharge |
-
2014
- 2014-07-04 CN CN201420370192.0U patent/CN203983967U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417086A (en) * | 2019-07-26 | 2019-11-05 | 深圳微步信息股份有限公司 | A kind of reset control circuit and mobile terminal of battery over-discharge |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20170704 |