CN202353187U - Short circuit and overcurrent protection unit for storage battery - Google Patents
Short circuit and overcurrent protection unit for storage battery Download PDFInfo
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- CN202353187U CN202353187U CN2011204959495U CN201120495949U CN202353187U CN 202353187 U CN202353187 U CN 202353187U CN 2011204959495 U CN2011204959495 U CN 2011204959495U CN 201120495949 U CN201120495949 U CN 201120495949U CN 202353187 U CN202353187 U CN 202353187U
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- short circuit
- gate
- controlled switch
- overcurrent protection
- storage battery
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Abstract
The utility model discloses a short circuit and overcurrent protection unit for a storage battery. The s short circuit and overcurrent protection unit comprises a central processor, a short circuit and overcurrent protection module, a controllable switch and a controllable switch driving module; the short circuit and overcurrent protection module and the controllable switch are connected between the storage battery and a public end of a load in series; the controllable switch comprises a control input end, and the controllable switch driving module can control the on/off of the controllable switch; the central processor controls the on/off of the short circuit and overcurrent protection module and the controllable switch driving module; when the short circuit and overcurrent protection module is started, the magnitude of current passing between the storage battery and the load can be detected, a trigger off signal produced according to a detected current value is output to the controllable switch driving module, so that the on/off of the controllable switch can be further controlled; and meanwhile, the short circuit and overcurrent protection module outputs a protection state signal to the central processor. The short circuit and overcurrent protection unit disclosed by the utility model can be used for cutting off a power supply rapidly at the moment of short circuit, is stable and reliable in work, and furthermore, can automatically relieve the protection according to a working state so as to realize the self-recovery of a circuit.
Description
Technical field
The utility model relates to short circuit, current foldback circuit technical field, particularly a kind of storage battery short circuit overcurrent protected location that is used for photovoltaic street lamp illumination system and photovoltaic road city lighting engineering.
Background technology
In current global energy nervous today, the utilization of new forms of energy and traditional energy energy-conservation has been the problem that national governments must consider.Solar energy is one of at present general and the most cheap clean energy resource.Solar illuminating system utilizes the photovoltaic principle exactly, utilizes daytime solar panel to charge in batteries.At night, light light fixture with being charged to electricity of accumulator.In case owing to during the storage battery short circuit, can discharge huge energy at short notice, thus effective protection of storage battery short circuit, and let various types of load reliably workings, be exactly the problem that we must face.
In solar illuminating system, realize that the parts of accumulator protecting most critical are exactly controller and constant-current source, controller reliable and stable directly has influence on the reliable and stable of whole system.Present most of controller for solar all adopts thermal fuse to deal with load short circuits.The shortcoming of this method is: in case load short circuits, fuse burns (metal-oxide-semiconductor also damages basically simultaneously simultaneously), and is irrecoverable, for the user, is equivalent to controller and damages.Also useful resettable fuse, but because load short circuits moment, short circuit current is at 200 ~ 300A even higher, and the reaction speed of resettable fuse can't effectively protect controller not to be damaged at all.
In order to overcome the above problems, we consider " electrical fuse ", and here, " electrical fuse " must meet following requirement: reaction speed is fast, must cut off the electricity supply rapidly at transcient short circuit time, and the reaction time must be in 5 us; Owing to driving capacitive load, necessary its characteristic of consideration prevents the mistake protection, and this passes through at the bigger electric current of startup moment permission with regard to requiring; Can recover, after being short-circuited, can automatically terminate protection according to operating state.
Summary of the invention
To the defective of prior art, the utility model provides a kind of storage battery short circuit overcurrent protected location, and it not only is swift in response, and the forbidden energy of protection with enable all controlledly, guarantee can to recover normal operating conditions behind the short-circuit protection.
For realizing above-mentioned purpose, the technical scheme that the utility model adopts is: a kind of storage battery short circuit overcurrent protected location comprises central processing unit, short circuit overcurrent protection module, gate-controlled switch and gate-controlled switch driver module;
Short circuit overcurrent protection module and gate-controlled switch are serially connected between the common port of storage battery and load; Gate-controlled switch comprises the control input end, and the gate-controlled switch driver module connects the control input end of gate-controlled switch, thus the conducting or the shutoff of control gate-controlled switch;
Central processing unit controls the startup of short circuit overcurrent protection module and gate-controlled switch driver module or cuts out; When the short circuit overcurrent protection module starts, can detect the size of current of passing through between storage battery and the load, and trigger cut-off signals to gate-controlled switch driver module according to detected current value output, and then the shutoff of control gate-controlled switch; Short circuit overcurrent protection module output protection status signal is to central processing unit simultaneously.
Preferably, the short circuit overcurrent protection module comprises comparator, first triode and second triode in the utility model; Two inputs of comparator connect the common port of direct voltage and storage battery respectively; First triode and the base stage of second triode all are connected the output of comparator; The exportable triggering cut-off signals of the collector electrode of first triode is to the gate-controlled switch driver module; The exportable guard mode signal of the collector electrode of second triode is to central processing unit.When load short circuits takes place when, comparator output high level and self-locking, first triode and the second triode conducting simultaneously, the gate-controlled switch driver module turn-offs gate-controlled switch after receiving and triggering cut-off signals; Central processing unit receives the guard mode signal.
Further, the said central processing unit of the utility model adopts microprocessor unit, and microprocessor unit can adopt existing single-chip microcomputer.Central processing unit realizes that through single-chip microcomputer pin output control signal control signal can be level or pulse signal to the startup of short circuit overcurrent protection module and gate-controlled switch driver module or the control of cutting out.Concrete; When the short circuit overcurrent protection module detects overcurrent condition; After central processing unit receives the guard mode signal, can be through certain number of times, restart the operation that short circuit overcurrent protection module and gate-controlled switch driver module come de-preservation; Confirm whether necessary being of load short circuits situation: if having the load short circuits situation then keep gate-controlled switch to turn-off, so that the load short circuits incident is got rid of solution; If the load short circuits situation does not exist, then gate-controlled switch conducting, load get electric normal operation.This control logic structure can the assurance system stability and the reliability of operation, relevant Single-chip Controlling program existing ripe programming technique capable of using is realized.
Further, the said gate-controlled switch of the utility model is the metal-oxide-semiconductor switch, and the metal-oxide-semiconductor switch comprises metal-oxide-semiconductor, and the grid of metal-oxide-semiconductor connects storage battery, and drain electrode connects load, and source electrode is the control input end of controlled switch.Metal-oxide-semiconductor can be the N-channel MOS pipe of prior art, and when using, the gate-controlled switch driver module in the utility model is controlled the conducting or the shutoff of gate-controlled switch through the voltage between control grid and the source electrode.
The utility model can start the gate-controlled switch driver module by central processing unit when starting, load is got; Start the short circuit overcurrent protection module simultaneously, the electric current that passes through between storage battery and the load is kept watch on.When load short circuits or overcurrent, the short-circuit protection module is with the automatic disconnection load, and self-locking makes that triggering cut-off signals continues to export, and guarantees that gate-controlled switch is in the guard mode of shutoff always before the central processing unit intervention; Short circuit overcurrent protection module notice central controller load short circuit simultaneously or overload get into guard mode; After central controller receives the guard mode signal, when the needs de-preservation, can close the gate-controlled switch driver module earlier, close the short circuit overcurrent protection module again.
The beneficial effect of the utility model is:
1. because the short circuit overcurrent protection module can " self-locking "; In a single day load short circuits takes place in other words, the short-circuit protection module can be exported and trigger the signal that turn-offs, and can keep this state always; Carry out " intervention " up to central controller, guaranteed the reliable and stable operation of system.
2. after fault was got rid of, by restarting of central controller controls short-circuit protection module and gate-controlled switch driver module, controllable short circuit overcurrent protection module made the utility model can adapt to various capacitives, perception or resistive load.
3. the short-circuit protection module is in short circuit; Can in several microseconds, react rapidly; In time close output, can not damage any element, and central processing unit can be through realizing the recovery voluntarily of control circuit to the control of short circuit overcurrent protection module and gate-controlled switch driver module.
Description of drawings
Shown in Figure 1 is the utility model structural principle sketch map;
Shown in Figure 2 is short circuit overcurrent protection module circuit theory diagrams in the utility model;
Shown in Figure 3 is gate-controlled switch and drive circuit module circuit theory diagrams thereof in the utility model.
Embodiment
For the content that makes the utility model is more obviously understandable, do to further describe below in conjunction with accompanying drawing and embodiment.
In conjunction with Fig. 1, the utility model comprises central processing unit, short circuit overcurrent protection module, gate-controlled switch and gate-controlled switch driver module; Short circuit overcurrent protection module and gate-controlled switch are serially connected between the common port of storage battery and load; Gate-controlled switch comprises the control input end, and the gate-controlled switch driver module connects the control input end of gate-controlled switch, thus the conducting or the shutoff of control gate-controlled switch; Central processing unit controls the startup of short circuit overcurrent protection module and gate-controlled switch driver module or cuts out; When the short circuit overcurrent protection module starts, can detect the size of current of passing through between storage battery and the load, and trigger cut-off signals to gate-controlled switch driver module according to detected current value output, and then the shutoff of control gate-controlled switch; Short circuit overcurrent protection module output protection status signal is to central processing unit simultaneously.
Fig. 2 and short circuit overcurrent protection module circuit theory diagrams and gate-controlled switch and the drive circuit module circuit theory diagrams thereof that are respectively in a kind of specific embodiment of the utility model shown in Figure 3.Wherein R7, Q3, R8, R15, Q7, D2, Q8, R9, D3 form gate-controlled switch driver module circuit at a high speed, are used for driving the metal-oxide-semiconductor switch of being made up of metal-oxide-semiconductor Q14 and resistance R 10.Short circuit overcurrent protection module circuit is made up of U1B, R36, D10, R37, R48, R53, C7, R55, Q15, R29, Q16.
In conjunction with Fig. 2, the short circuit overcurrent protection module comprises comparator U1B, the first triode Q15 and the second triode Q16; , comparator can be selected prior comparators product LM2094 for use, and an one of which input connects direct voltage VCC through resistance R 48, and another input connects the common port of storage battery through current-limiting resistance; The first triode Q15 and the base stage of the second triode Q16 all are connected the output of comparator U1B; When load short circuits takes place when, comparator U1B output high level and self-locking, the first triode Q15 and the second triode Q16 conducting simultaneously, first triode Q15 output triggers cut-off signals CUT_OFF to the gate-controlled switch driver module, makes gate-controlled switch turn-off; The second triode Q16 output protection status signal INT_OFF receives to central processing unit.
The utility model central processing unit adopts microprocessor unit, and microprocessor unit can adopt existing single-chip microcomputer.In conjunction with Fig. 2 and Fig. 3, central processing unit is to the control of short circuit overcurrent protection module, and Reference realizes through single-chip microcomputer pin output control level signal; Control to the gate-controlled switch driver module realizes through single-chip microcomputer pin output level or pulse signal PWM3.
Can start the gate-controlled switch driver module by central processing unit during application, load is got; Simultaneously Reference is put lowly, enable the short circuit overcurrent protection module; When the short circuit overcurrent protection module detects overcurrent condition; Promptly ought be short-circuited or electric current surpasses the protection value, during like the protection value 12A among the utility model embodiment, the output of comparator U1B; I.e. 7 pin output high level; Make Q15, Q16 conducting, the triggering cut-off signals is exported in the Q15 conducting at once, and Q16 conducting notice central processing unit has got into guard mode simultaneously.After central processing unit receives the guard mode signal; Can be through certain number of times; Restart the operation that short circuit overcurrent protection module and gate-controlled switch driver module come de-preservation; Confirm whether necessary being of load short circuits situation: the output locking of comparator in the short circuit overcurrent protection module is promptly removed in the releasing of short-circuit protection state, and central processing unit is realized through Reference is changed to high level; If have the load short circuits situation then keep gate-controlled switch to turn-off, so that the load short circuits incident is got rid of solution; If the load short circuits situation does not exist, then gate-controlled switch conducting, load get electric normal operation.
Concrete, if got into guard mode, central processing unit can cut out the gate-controlled switch driver module earlier, again reference is put height, comes de-preservation, the relevant control of central processing unit realizes through mcu programming.
As shown in Figure 3, the gate-controlled switch in the utility model is the metal-oxide-semiconductor switch, and the metal-oxide-semiconductor switch is made up of metal-oxide-semiconductor Q14 and resistance R 10, and the grid of metal-oxide-semiconductor Q14 connects storage battery, and drain electrode connects load, and source electrode is the control input end of controlled switch.Metal-oxide-semiconductor is existing N-channel MOS pipe, and when using, the gate-controlled switch driver module in the utility model is controlled the conducting or the shutoff of gate-controlled switch through the voltage between control grid S and the source electrode G.The circuit of gate-controlled switch module also can be other forms, as long as according to the control signal PWM that triggers cut-off signals CUT_OFF and central processing unit, can realize the conducting of metal-oxide-semiconductor or turn-off getting final product.
The case of practical implementation described in the utility model is merely the preferable case study on implementation of the utility model, is not the practical range that is used for limiting the utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should be as the technological category of the utility model.
Claims (4)
1. a storage battery short circuit overcurrent protected location is characterized in that, comprises central processing unit, short circuit overcurrent protection module, gate-controlled switch and gate-controlled switch driver module;
Short circuit overcurrent protection module and gate-controlled switch are serially connected between the common port of storage battery and load; Gate-controlled switch comprises the control input end, and the gate-controlled switch driver module connects the control input end of gate-controlled switch, thus the conducting or the shutoff of control gate-controlled switch;
Central processing unit controls the startup of short circuit overcurrent protection module and gate-controlled switch driver module or cuts out; When the short circuit overcurrent protection module starts, can detect the size of current of passing through between storage battery and the load, and trigger cut-off signals to gate-controlled switch driver module according to detected current value output, and then the shutoff of control gate-controlled switch; Short circuit overcurrent protection module output protection status signal is to central processing unit simultaneously.
2. storage battery short circuit overcurrent protected location according to claim 1 is characterized in that the short circuit overcurrent protection module comprises comparator, first triode and second triode; Two inputs of comparator connect the common port of direct voltage and storage battery respectively; First triode and the base stage of second triode all are connected the output of comparator; The exportable triggering cut-off signals of the collector electrode of first triode is to the gate-controlled switch driver module; The exportable guard mode signal of the collector electrode of second triode is to central processing unit.
3. storage battery short circuit overcurrent protected location according to claim 1 and 2 is characterized in that gate-controlled switch is the metal-oxide-semiconductor switch, and the metal-oxide-semiconductor switch comprises metal-oxide-semiconductor, and the grid of metal-oxide-semiconductor connects storage battery, and drain electrode connects load, and source electrode is the control input end of controlled switch.
4. storage battery short circuit overcurrent protected location according to claim 1 and 2 is characterized in that, central processing unit adopts microprocessor unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204959495U CN202353187U (en) | 2011-12-03 | 2011-12-03 | Short circuit and overcurrent protection unit for storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204959495U CN202353187U (en) | 2011-12-03 | 2011-12-03 | Short circuit and overcurrent protection unit for storage battery |
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| Publication Number | Publication Date |
|---|---|
| CN202353187U true CN202353187U (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204959495U Expired - Fee Related CN202353187U (en) | 2011-12-03 | 2011-12-03 | Short circuit and overcurrent protection unit for storage battery |
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| CN (1) | CN202353187U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052085A (en) * | 2013-03-11 | 2014-09-17 | 深圳硕日新能源科技有限公司 | Solar-energy controller drive circuit with short-circuit protection function |
| CN104459436A (en) * | 2014-11-24 | 2015-03-25 | 重庆长安汽车股份有限公司 | Short-circuit fault diagnosis method and device for battery system high-voltage load loop |
| CN104795787A (en) * | 2014-01-21 | 2015-07-22 | 上海海拉电子有限公司 | Protection circuit, drive control system and control method of drive control system |
| CN110350494A (en) * | 2019-06-28 | 2019-10-18 | 深圳市明信测试设备有限公司 | A kind of direct current protecting method of adjustable protective range |
| CN111007434A (en) * | 2019-12-25 | 2020-04-14 | 深圳万讯自控股份有限公司 | Output short circuit detection protection circuit and method |
| CN113839450A (en) * | 2021-10-29 | 2021-12-24 | 深圳市道通智能航空技术股份有限公司 | Battery short-circuit protection circuit, battery and unmanned aerial vehicle |
-
2011
- 2011-12-03 CN CN2011204959495U patent/CN202353187U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104052085A (en) * | 2013-03-11 | 2014-09-17 | 深圳硕日新能源科技有限公司 | Solar-energy controller drive circuit with short-circuit protection function |
| CN104052085B (en) * | 2013-03-11 | 2016-09-07 | 深圳硕日新能源科技有限公司 | A kind of controller for solar drive circuit of band short-circuit protection |
| CN104795787A (en) * | 2014-01-21 | 2015-07-22 | 上海海拉电子有限公司 | Protection circuit, drive control system and control method of drive control system |
| CN104795787B (en) * | 2014-01-21 | 2018-06-12 | 上海海拉电子有限公司 | A kind of protection circuit, driving control system and its control method |
| CN104459436A (en) * | 2014-11-24 | 2015-03-25 | 重庆长安汽车股份有限公司 | Short-circuit fault diagnosis method and device for battery system high-voltage load loop |
| CN110350494A (en) * | 2019-06-28 | 2019-10-18 | 深圳市明信测试设备有限公司 | A kind of direct current protecting method of adjustable protective range |
| CN111007434A (en) * | 2019-12-25 | 2020-04-14 | 深圳万讯自控股份有限公司 | Output short circuit detection protection circuit and method |
| CN113839450A (en) * | 2021-10-29 | 2021-12-24 | 深圳市道通智能航空技术股份有限公司 | Battery short-circuit protection circuit, battery and unmanned aerial vehicle |
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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: 20120725 Termination date: 20201203 |