CN202309018U - Power supply system and power supply protection circuit thereof - Google Patents
Power supply system and power supply protection circuit thereof Download PDFInfo
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- CN202309018U CN202309018U CN201120421034XU CN201120421034U CN202309018U CN 202309018 U CN202309018 U CN 202309018U CN 201120421034X U CN201120421034X U CN 201120421034XU CN 201120421034 U CN201120421034 U CN 201120421034U CN 202309018 U CN202309018 U CN 202309018U
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Abstract
The utility model discloses a power supply system and a power supply protection circuit thereof. The power supply protection circuit is used for carrying out short circuit protection for a power supply. A first power supply end and a second power supply end of the power supply are correspondingly connected with a first load end and a second load end of a load. The power supply protection circuit comprises a short circuit detection module, a protection switch and a control module, wherein the short circuit detection module is used for detecting that whether a short circuit exists between the first load end and the second load end or not; the protection switch is connected between the first power supply end and the second power supply end; and the control module is used for controlling the discontinuous switching on of the protection switch when the short circuit existing between the first load end and the second load end is detected by the short circuit detection module. In such a way, according to the power supply system and the power supply protection circuit thereof, disclosed by the utility model, the load can be charged by utilizing the discontinuous switching on of the protection switch when the short circuit of the load is detected, and the misjudgment of the short circuit of the load can be effectively prevented.
Description
Technical field
The utility model relates to the power protection field, particularly relates to a kind of electric power system and power protecting circuit thereof.
Background technology
In electric power system, in the electric power system of particularly many string high power batteries, putting can appear in discharge process in battery, the situation of overcurrent or short circuit, so the protection during battery discharge is even more important.Wherein, battery also is a kind of very serious phenomenon by short circuit, also is the comparison common phenomena, and is untimely if battery is protected during by short circuit, the danger that battery leakage will occur, burn even can set off an explosion.
Referring to Fig. 1, Fig. 1 is the sketch map of existing electric power system.Existing electric power system comprises battery pack 11, metal-oxide-semiconductor M1 and battery management module 14.Battery pack 11 is in series by a plurality of battery V1.First management end 141 of battery management module 14 connects first load end 121 of load 12, and second management end 142 of battery management module 14 connects metal-oxide-semiconductor M1.Metal-oxide-semiconductor M1 has first switch terminals 131, second switch end 132 and the 3rd switch terminals 133.First switch terminals 131 connects second management end 142 of battery management module 14, to receive the control signal of battery management module 14.Second switch end 132 connects first load end 121 of first power end, 111, the three switch terminals, the 133 connection loads 12 of battery pack 11.The second source end 112 of battery pack 11 connects second load end 122 of load 12.When circuit is started working; Battery management module 14 detects the voltage at first load end, 121 places of load 12 through first management end 141; If the voltage at first load end, 121 places is higher than scheduled voltage; Then think load 12 short circuits, the second switch end 132 of control metal-oxide-semiconductor M1 and 133 disconnections of the 3rd switch terminals.
But, as shown in Figure 1, tend to capacitor C 1 of parallel connection in the load 12, then when battery pack 11 connected load 12, the voltage instantaneous at capacitor C 1 two ends of load 12 can equate.At this moment, battery management module 14 can be judged load 12 short circuits by accident, thereby the second switch end 132 of control metal-oxide-semiconductor M1 and 133 disconnections of the 3rd switch terminals cause electric power system to start.
Summary of the invention
The technical problem that the utility model mainly solves provides a kind of electric power system and power protecting circuit thereof, to avoid in power up the erroneous judgement to load short circuits.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of power protecting circuit is provided, is used for power supply is carried out short-circuit protection.First power end of this power supply and corresponding first load end and second load end that is connected load of second source end.This power protecting circuit comprises: short-circuit detecting module, protection switch and control module.The short-circuit detecting module is used to detect between first load end and second load end whether have short circuit.Protection switch is connected between first power end and first load end.Control module detects when having short circuit between first load end and second load end in the short-circuit detecting module, the conducting of control protection switch discontinuity.
Wherein, control module comprises control signal output ends, and protection switch comprises first switch terminals, second switch end and the 3rd switch terminals.The first switch terminals connection control signal output is to receive control signal, and the second switch end connects first power end, and the 3rd switch terminals connects first load end, second switch end and the 3rd switch terminals conducting or disconnection under the control of control signal.
Wherein, control signal is a pulse-width signal.
Wherein, control signal comprises first level signal and second level signal, second switch end and the conducting under the control of first level signal of the 3rd switch terminals, and second switch end and the 3rd switch terminals are broken off under the control of second level signal.
Wherein, protection switch is a switching tube.
Wherein, switching tube is a metal-oxide-semiconductor.
Wherein, control module further comprises signal input part, and the short-circuit detecting module is a voltage detection module, and voltage detection module comprises the detection input and detects output, detects input and connects first load end, detects output connection signal input part.
Wherein, behind control module control protection switch discontinuity conducting predetermined time interval, the short-circuit detecting module detects between first load end and second load end and still has short circuit, and then control module control protection switch breaks off.
For solving the problems of the technologies described above, another technical scheme that the utility model adopts is: a kind of electric power system is provided, and this electric power system comprises: power supply, short-circuit detecting module, protection switch and control module.Power supply comprises first power end and second source end, first power end and corresponding first load end and second load end that is connected load of second source end.The short-circuit detecting module is used to detect between first load end and second load end whether have short circuit.Protection switch is connected between first power end and first load end.Control module detects when having short circuit between first load end and second load end in the short-circuit detecting module, the conducting of control protection switch discontinuity.
Wherein, behind control module control protection switch discontinuity conducting predetermined time interval, the short-circuit detecting module detects between first load end and second load end and still has short circuit, and then control module control protection switch breaks off.
The beneficial effect of the utility model is: the situation that is different from prior art; Electric power system of the utility model and power protecting circuit thereof can utilize the discontinuity conducting of protection switch that load is charged detecting when there is short circuit in load; Can effectively distinguish the imitative situation that real battery short circuit and other loads cause like short circuit; Thereby improved the reliability of protection on the one hand; Improved the normal reliability of using of product in addition on the one hand, greatly reduced the probability of erroneous judgement, effectively prevented erroneous judgement load short circuits.
Description of drawings
Fig. 1 is the sketch map of existing electric power system;
Fig. 2 is the sketch map of an embodiment of the utility model electric power system.
Embodiment
Consult Fig. 2, Fig. 2 is the sketch map of an embodiment of the utility model electric power system.The embodiment of the electric power system of the utility model comprises: power supply 21, short-circuit detecting module 26, protection switch M2 and control module 27.
In the present embodiment, power supply 21 is in series by a plurality of battery V2.In other embodiments, power supply 21 can be single battery or other power supply components.First power end 211 of power supply 21 and second source end 212 corresponding first load end 221 and second load ends 222 that are connected load 22.
In the present embodiment, this control signal is a pulse-width signal, and control signal comprises first level signal (for example, high level signal) and second level signal (for example, low level signal).Second switch end 232 and the 3rd switch terminals 233 conducting under the control of first level signal, second switch end 232 and the 3rd switch terminals 233 are broken off under the control of second level signal.When first level signal in the pulse-width signal and the second level signal alternate, then may command protection switch M2 discontinuity conducting.
In the present embodiment, short-circuit detecting module 26 is a voltage detection module.Short-circuit detecting module 26 comprises detection input 261 and detects output 262.Detect input 261 and connect first load end 221, detect the signal input part 273 of output 262 link control modules 27.In other embodiments, short-circuit detecting module 26 can be the current detection module of connecting with load 22.
When power supply 21 was connected to load 22, if load 22 is parallel with capacitor C 2, then voltage moment of capacitor C 2 equated.The voltage that short-circuit detecting module 26 detects first load end 221 exceeds normal range of operation, and thinks load 22 short circuits.At this moment, short-circuit detecting module 26 is sent the signal input part 273 that has signal to the control module 27 of short circuit between first load end 221 and second load end 222 through detecting output 262.Control module 27 is sent control signal, control second switch end 232 and the 233 discontinuity conductings of the 3rd switch terminals.The ON time of second switch end 232 and the 3rd switch terminals 233 suitably is provided with, so that the big electric current that moment produces can not burn out protection switch M2 and other elements.
During the each conducting of protection switch M2, all can charge to capacitor C 2.Behind the 2 charging predetermined time intervals of the capacitor C in the load 22, the change in voltage of first load end 221.Short-circuit detecting module 26 detects the voltage of first load end 221 in normal range of operation, sends control signal control protection switch M2 by control module 27 and keeps conducting state, the operate as normal of proof load 22.At this moment, electric power system gets into normal operating conditions.Behind protection switch M2 discontinuity conducting predetermined time interval; Short-circuit detecting module 26 detects between first load end 221 and second load end 222 and still has short circuit; Assert then between first load end 221 and second load end 222 to have short circuit really that control module 27 control protection switch M2 keep off-state.At this moment, electric power system gets into the short-circuit protection state.
The beneficial effect of the utility model is: the situation that is different from prior art; Electric power system of the utility model and power protecting circuit thereof can utilize the discontinuity conducting of protection switch that load is charged detecting when there is short circuit in load; Can effectively distinguish the imitative situation that real battery short circuit and other loads cause like short circuit; Thereby improved the reliability of protection on the one hand; Improved the normal reliability of using of product in addition on the one hand, greatly reduced the probability of erroneous judgement, effectively prevented erroneous judgement load short circuits.
The above is merely the embodiment of the utility model; Be not thus the restriction the utility model claim; Every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the utility model.
Claims (10)
1. a power protecting circuit is used for power supply is carried out short-circuit protection, and first power end of said power supply and corresponding first load end and second load end that is connected load of second source end is characterized in that said power protecting circuit comprises:
The short-circuit detecting module detects between said first load end and said second load end whether have short circuit;
Protection switch is connected between said first power end and said first load end;
Control module detects when having short circuit between said first load end and said second load end in said short-circuit detecting module, controls the conducting of said protection switch discontinuity.
2. power protecting circuit according to claim 1; It is characterized in that; Said control module comprises control signal output ends; Said protection switch comprises first switch terminals, second switch end and the 3rd switch terminals, and said first switch terminals connects said control signal output ends to receive control signal, and said second switch end connects said first power end; Said the 3rd switch terminals connects said first load end, said second switch end and said the 3rd switch terminals conducting or disconnection under the control of said control signal.
3. power protecting circuit according to claim 2 is characterized in that, said control signal is a pulse-width signal.
4. power protecting circuit according to claim 3; It is characterized in that; Said control signal comprises first level signal and second level signal; Said second switch end and the conducting under the control of said first level signal of said the 3rd switch terminals, said second switch end and said the 3rd switch terminals are broken off under the control of said second level signal.
5. power protecting circuit according to claim 2 is characterized in that, said protection switch is a switching tube.
6. battery management module according to claim 5 is characterized in that, said switching tube is a metal-oxide-semiconductor.
7. power protecting circuit according to claim 2; It is characterized in that; Said control module further comprises signal input part, and said short-circuit detecting module is a voltage detection module, and said voltage detection module comprises the detection input and detects output; Said detection input connects said first load end, and said detection output connects said signal input part.
8. according to the power protecting circuit shown in the claim 1; It is characterized in that; After said control module is controlled said protection switch discontinuity conducting predetermined time interval; Said short-circuit detecting module detects between said first load end and said second load end and still has short circuit, and then said control module is controlled said protection switch and broken off.
9. an electric power system is characterized in that, said electric power system comprises:
Power supply, said power supply comprise first power end and second source end, said first power end and corresponding first load end and second load end that is connected load of said second source end;
The short-circuit detecting module detects between said first load end and said second load end whether have short circuit;
Protection switch is connected between said first power end and said first load end;
Control module detects when having short circuit between said first load end and said second load end in said short-circuit detecting module, controls the conducting of said protection switch discontinuity.
10. according to the electric power system shown in the claim 9; It is characterized in that; After said control module is controlled said protection switch discontinuity conducting predetermined time interval; Said short-circuit detecting module detects between said first load end and said second load end and still has short circuit, and then said control module is controlled said protection switch and broken off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120421034XU CN202309018U (en) | 2011-10-28 | 2011-10-28 | Power supply system and power supply protection circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120421034XU CN202309018U (en) | 2011-10-28 | 2011-10-28 | Power supply system and power supply protection circuit thereof |
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| Publication Number | Publication Date |
|---|---|
| CN202309018U true CN202309018U (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120421034XU Expired - Fee Related CN202309018U (en) | 2011-10-28 | 2011-10-28 | Power supply system and power supply protection circuit thereof |
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| CN (1) | CN202309018U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094932A (en) * | 2011-10-28 | 2013-05-08 | 东莞钜威新能源有限公司 | Power supply system and power protection circuit thereof |
-
2011
- 2011-10-28 CN CN201120421034XU patent/CN202309018U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103094932A (en) * | 2011-10-28 | 2013-05-08 | 东莞钜威新能源有限公司 | Power supply system and power protection circuit thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160203 Address after: 523808, Guangdong District, Songshan hi tech Industrial Development Zone, Dongguan, seven industrial North Road, 1 force science and technology center, 3 floor, B District Patentee after: Dongguan Powerwise Technology Co., Ltd. Address before: 523808 productivity building, Songshan science and Technology Industrial Park, Guangdong, Dongguan Province, room 401-403 Patentee before: Dongguan PowerWise New Energy Co., Ltd. |
|
| 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: 20120704 Termination date: 20191028 |