CN101895139A - Discharge protection circuit - Google Patents
Discharge protection circuit Download PDFInfo
- Publication number
- CN101895139A CN101895139A CN 201010226040 CN201010226040A CN101895139A CN 101895139 A CN101895139 A CN 101895139A CN 201010226040 CN201010226040 CN 201010226040 CN 201010226040 A CN201010226040 A CN 201010226040A CN 101895139 A CN101895139 A CN 101895139A
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- China
- Prior art keywords
- control unit
- battery
- unit
- protected location
- protection circuit
- Prior art date
- 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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- Protection Of Static Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a discharge protection circuit comprising a charge unit, a control unit, a battery, a discharge unit and a protection unit, wherein the charge unit is connected to the battery and the control unit; the discharge unit is connected to the battery and the control unit; the battery is connected to the control unit; the discharge unit is also connected to the protection unit which is also connected to the control unit; the charge unit is used for controlling the battery to be charged under the condition of inputting external power supply voltage; the protection unit is used for overcurrent protection of output voltage; and the control unit is used for controlling the charge unit and the protection unit.
Description
[technical field]
The present invention relates to field of power supplies, particularly a kind of discharge protection circuit.
[background technology]
Adopt at present battery more and more,, improve battery useful life, adopt rechargeable battery usually in order to improve the battery service efficiency as the electronic product of power supply.Prior art does not have any protection for the battery charging and discharging overcurrent, and fail safe is very low.
[summary of the invention]
In order to solve the above-mentioned technical problem of prior art, be necessary to provide a kind of safe discharge protection circuit.
The present invention solves the technical scheme that existing technical problem adopts: a kind of discharge protection circuit; comprise charhing unit; control unit; battery; discharge cell and protected location; charhing unit is connected to battery and control unit; discharge cell is connected to battery and control unit; battery is also connected to control unit; discharge cell is also connected to protected location; protected location is also connected to control unit; described charhing unit is used to manage externally supply voltage input charging down of battery; described protected location is used for the overcurrent protection as output voltage, and control unit is used to control charhing unit and protected location.
In the discharge protection circuit of the present invention, described protected location comprises relay, resistance, triode and resistance, and the base stage of triode is connected to control unit by resistance, grounded emitter, and collector electrode is connected to relay.
Compared to prior art, discharge protection circuit of the present invention comprises this discharge cell, and protective value is perfect, and is safe, and circuit structure is simple, and circuit is practical.
[description of drawings]
Fig. 1 is the block diagram of discharge protection circuit one better embodiment of the present invention.
Fig. 2 is the electrical block diagram of Fig. 1 discharge protection circuit protected location.
[embodiment]
Be described in further detail below in conjunction with accompanying drawing and embodiments of the present invention.
Seeing also Fig. 1, is the block diagram of discharge protection circuit one better embodiment of the present invention.This discharge protection circuit comprises charhing unit 100, control unit 101, battery 102, discharge cell 103 and protective circuit 104.Charhing unit 100 is connected to battery 102 and control unit 101.Discharge cell 103 is connected to battery 102 and control unit 101.Battery 102 is also connected to control unit 101.Discharge cell 103 is also connected to protected location 104.Protected location 104 is also connected to control unit 101.Described charhing unit 100 is used to manage externally supply voltage input charging down of battery.Described protected location 104 is used for the overcurrent protection as output voltage.Control unit 101 is used to control charhing unit 100 and protected location 104.
Please consulting Fig. 2 simultaneously, is the electrical block diagram of discharge protection circuit control unit shown in Figure 1.Protected location 104 comprises relay K 1, resistance NTC, triode Q1 and resistance R 1.The base stage of triode Q1 is connected to control unit 101 by resistance R 1, grounded emitter, and collector electrode is connected to relay K 1.Relay K 1 is also connected to the 12V voltage source.
When starting power supply and be used to start the rear end load, if battery 102 is too low or too high for voltage, relay K 1 control of under control unit 101 controls, not striking sparks, the safety of assurance both sides battery.Control unit 101 applies the base stage that low level is given triode Q1, not conducting of triode Q1, and relay K 1 is not struck sparks.The short-circuit protection that resistance NTC is used to export and finish the sparking function fast prevents that the overcurrent time is oversize, damages battery.If discharging current surpasses the scope that battery 102 can bear then resistance NTC produces the protection action, prevent from that battery 102 from being crossed to put damage.The two ends of 1,2 expression starting resistor outputs among Fig. 2.The discharge power supply positive pole is connected to starting resistor end 1 by relay K 1, resistance NTC, and negative pole is connected to end 2.
Compared to prior art, discharge protection circuit of the present invention comprises this discharge cell, and protective value is perfect, and circuit structure is simple, and circuit is practical.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (3)
1. discharge protection circuit; it is characterized in that: comprise charhing unit, control unit, battery, discharge cell and protected location; charhing unit is connected to battery and control unit; discharge cell is connected to battery and control unit; battery is also connected to control unit; discharge cell is also connected to protected location; protected location is also connected to control unit; described charhing unit is used to manage externally supply voltage input charging down of battery; described protected location is used for the overcurrent protection as output voltage, and control unit is used to control charhing unit and protected location.
2. discharge protection circuit as claimed in claim 1 is characterized in that: described protected location comprises relay, resistance, triode and resistance, and the base stage of triode is connected to control unit by resistance, grounded emitter, and collector electrode is connected to relay.
3. discharge protection circuit as claimed in claim 2 is characterized in that: described relay connects the input of 12V voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010226040 CN101895139A (en) | 2010-07-13 | 2010-07-13 | Discharge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010226040 CN101895139A (en) | 2010-07-13 | 2010-07-13 | Discharge protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101895139A true CN101895139A (en) | 2010-11-24 |
Family
ID=43104248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010226040 Pending CN101895139A (en) | 2010-07-13 | 2010-07-13 | Discharge protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101895139A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201032688Y (en) * | 2006-11-01 | 2008-03-05 | 周海 | Positive and negative pulse charger |
-
2010
- 2010-07-13 CN CN 201010226040 patent/CN101895139A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201032688Y (en) * | 2006-11-01 | 2008-03-05 | 周海 | Positive and negative pulse charger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20101124 |