CN204835509U - Hold battery under voltage protection circuit - Google Patents
Hold battery under voltage protection circuit Download PDFInfo
- Publication number
- CN204835509U CN204835509U CN201520475569.3U CN201520475569U CN204835509U CN 204835509 U CN204835509 U CN 204835509U CN 201520475569 U CN201520475569 U CN 201520475569U CN 204835509 U CN204835509 U CN 204835509U
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- Prior art keywords
- resistance
- relay
- storage battery
- chip
- electric capacity
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- Expired - Fee Related
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a hold battery under voltage protection circuit, including relay K, one -way silicon controlled rectifier Q1, chip IC1 summation potential ware RP1, battery E's positive pole is connected to relay K's contact K -1's one end, and electric capacity C1, resistance R3, resistance R5, load RL, chip IC1's pin 3 and one -way silicon controlled rectifier Q1's negative pole are connected to battery E's negative pole, relay K's contact K -1's other end connecting resistance R1, resistance R2, electric capacity C2, load RL's the other end and relay K. The utility model discloses hold battery under voltage protection circuit adopts the adjustable accurate steady voltage source of TL431 type three -terminal as undervoltage protection controlling element, has improved integrated circuit degree and control accuracy to reduced the quiescent power dissipation, therefore the circuit has simple structure, controls advantage accurate, the low power dissipation.
Description
Technical field
Background technology
As everyone knows; useful life of storage battery along with the lengthening electricity of service time can be fewer and feweri; the voltage reduction that a big chunk reason is battery overdischarge and causes can cause pole plate acidifying; thus reduce the normal service life of storage battery; most of storage battery is not equipped with undervoltage protection device in the market; reason is the most complex structure of existing under-voltage protecting circuit; the protective device volume produced is larger; and it is large for quiescent dissipation during monitoring voltage; waste electric energy, also can have influence on the output voltage stability of load.
Utility model content
The purpose of this utility model is to provide the storage battery under-voltage protective circuit that a kind of structure is simple, quiescent dissipation is low, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of storage battery under-voltage protective circuit, comprises relay K, one-way SCR Q1, chip IC 1 and potentiometer RP1, one end of the contact K-1 of described relay K connects the positive pole of storage battery E, and the negative pole of storage battery E connects electric capacity C1, resistance R3, resistance R5, load RL, the pin 3 of chip IC 1 and the negative electrode of one-way SCR Q1, the other end contact resistance R1 of the contact K-1 of relay K, resistance R2, electric capacity C2, the other end of load RL and relay K, the other end of relay K connects the other end of electric capacity C2 and the anode of one-way SCR Q1, and the control pole of one-way SCR Q1 connects the other end of electric capacity C1, the other end of resistance R4 and resistance R5, the other end of resistance R1 connects the stiff end of potentiometer RP1 and the sliding end of potentiometer RP1, the other end of another stiff end contact resistance R3 of potentiometer RP1 and the pin 2 of chip IC 1, the other end of other end contact resistance R4 of resistance R2 and the pin 1 of chip IC 1, described chip IC 1 is TL431 type three end adjustable precision source of stable pressure.
As further program of the utility model: described relay K is normally-closed contact relay.
As further program of the utility model: the rated voltage of described storage battery E is 12V.
Compared with prior art; the beneficial effects of the utility model are: the utility model storage battery under-voltage protective circuit adopts TL431 type three end adjustable precision source of stable pressure as under-voltage protection control element; improve circuit level and control precision; and reduce quiescent dissipation, therefore circuit have structure simple, control advantage accurate, low in energy consumption.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of storage battery under-voltage protective circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of storage battery under-voltage protective circuit, comprises relay K, one-way SCR Q1, chip IC 1 and potentiometer RP1, it is characterized in that, one end of the contact K-1 of described relay K connects the positive pole of storage battery E, the negative pole of storage battery E connects electric capacity C1, resistance R3, resistance R5, load RL, the pin 3 of chip IC 1 and the negative electrode of one-way SCR Q1, the other end contact resistance R1 of the contact K-1 of relay K, resistance R2, electric capacity C2, the other end of load RL and relay K, the other end of relay K connects the other end of electric capacity C2 and the anode of one-way SCR Q1, the control pole of one-way SCR Q1 connects the other end of electric capacity C1, the other end of resistance R4 and resistance R5, the other end of resistance R1 connects the stiff end of potentiometer RP1 and the sliding end of potentiometer RP1, the other end of another stiff end contact resistance R3 of potentiometer RP1 and the pin 2 of chip IC 1, the other end of other end contact resistance R4 of resistance R2 and the pin 1 of chip IC 1, described chip IC 1 is TL431 type three end adjustable precision source of stable pressure.
Relay K is normally-closed contact relay.
The rated voltage of storage battery E is 12V.
Operation principle of the present utility model is: the rated voltage of storage battery E is 12V, and under normal operating conditions, relay K no power, therefore its normally-closed contact J-1 is failure to actuate, and circuit obtains and electricly enters operating state.First because the voltage at electric capacity C1 two ends can not suddenly change, keep near 0V, one-way SCR Q1 ends, as battery tension > 10.7V, three end adjustable precision source of stable pressure IC1 conductings, one-way SCR Q1 controls pole to be ended because not having trigger voltage, relay K is failure to actuate, storage battery and late-class circuit are in Operating In Persistent Current Mode state, as battery tension < 10.7V, three end adjustable precision source of stable pressure IC1 end, and storage battery E is charged to electric capacity C1 by resistance R2 and resistance R4.When C1 both end voltage reaches about 0.6V, one-way SCR Q1 is triggered conducting, relay K conducting, and the contact J-1 of relay K disconnects, and disconnects successive load circuit, thus reaches the object to storage battery under-voltage protection.Circuit adopts TL431 type three end adjustable precision source of stable pressure as under-voltage protection control element, improves circuit level and control precision, and reduces quiescent dissipation.
Claims (3)
1. a storage battery under-voltage protective circuit, comprises relay K, one-way SCR Q1, chip IC 1 and potentiometer RP1, it is characterized in that, one end of the contact K-1 of described relay K connects the positive pole of storage battery E, the negative pole of storage battery E connects electric capacity C1, resistance R3, resistance R5, load RL, the pin 3 of chip IC 1 and the negative electrode of one-way SCR Q1, the other end contact resistance R1 of the contact K-1 of relay K, resistance R2, electric capacity C2, the other end of load RL and relay K, the other end of relay K connects the other end of electric capacity C2 and the anode of one-way SCR Q1, the control pole of one-way SCR Q1 connects the other end of electric capacity C1, the other end of resistance R4 and resistance R5, the other end of resistance R1 connects the stiff end of potentiometer RP1 and the sliding end of potentiometer RP1, the other end of another stiff end contact resistance R3 of potentiometer RP1 and the pin 2 of chip IC 1, the other end of other end contact resistance R4 of resistance R2 and the pin 1 of chip IC 1, described chip IC 1 is TL431 type three end adjustable precision source of stable pressure.
2. a kind of storage battery under-voltage protective circuit according to claim 1, is characterized in that, described relay K is normally-closed contact relay.
3. a kind of storage battery under-voltage protective circuit according to claim 1, is characterized in that, the rated voltage of described storage battery E is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520475569.3U CN204835509U (en) | 2015-07-06 | 2015-07-06 | Hold battery under voltage protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520475569.3U CN204835509U (en) | 2015-07-06 | 2015-07-06 | Hold battery under voltage protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204835509U true CN204835509U (en) | 2015-12-02 |
Family
ID=54693068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520475569.3U Expired - Fee Related CN204835509U (en) | 2015-07-06 | 2015-07-06 | Hold battery under voltage protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204835509U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656170A (en) * | 2016-02-25 | 2016-06-08 | 成都迅德科技有限公司 | Novel storage battery under-voltage detection circuit |
| CN110539641A (en) * | 2018-05-29 | 2019-12-06 | 厦门雅迅网络股份有限公司 | Low-voltage early warning and automatic power-off protection circuit of vehicle-mounted storage battery |
-
2015
- 2015-07-06 CN CN201520475569.3U patent/CN204835509U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656170A (en) * | 2016-02-25 | 2016-06-08 | 成都迅德科技有限公司 | Novel storage battery under-voltage detection circuit |
| CN110539641A (en) * | 2018-05-29 | 2019-12-06 | 厦门雅迅网络股份有限公司 | Low-voltage early warning and automatic power-off protection circuit of vehicle-mounted storage battery |
| CN110539641B (en) * | 2018-05-29 | 2022-02-18 | 厦门雅迅网络股份有限公司 | Low-voltage early warning and automatic power-off protection circuit of vehicle-mounted storage battery |
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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: 20151202 Termination date: 20160706 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |