CN203553933U - Circuit for storage battery isolation reversal connection protection - Google Patents
Circuit for storage battery isolation reversal connection protection Download PDFInfo
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- CN203553933U CN203553933U CN201320615151.9U CN201320615151U CN203553933U CN 203553933 U CN203553933 U CN 203553933U CN 201320615151 U CN201320615151 U CN 201320615151U CN 203553933 U CN203553933 U CN 203553933U
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- storage battery
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Abstract
The utility model provides a circuit for storage battery isolation reversal connection protection; the circuit for storage battery isolation reversal connection protection comprises a MCU controller, an input polarity discrimination circuit, a battery voltage feedback circuit, an isolation reverse MOS pipe drive circuit, an isolation reverse MOS pipe circuit, a charging MOS pipe drive circuit and a charging MOS pipe circuit; the input polarity discrimination circuit is connected with an anode of the storage battery through the isolation reverse MOS pipe circuit, the charging MOS pipe circuit and the battery voltage feedback circuit; the input polarity discrimination circuit and the battery voltage feedback circuit respectively return a feedback signal to the MCU controller; the MCU controller controls the isolation reverse MOS pipe drive circuit and the charging MOS pipe drive circuit according to the feedback signal. The advantages are that the circuit for storage battery isolation reversal connection protection is simple in structure, low in cost, strong in practicality and strong in stability, can be suitable for anti-reversal connection protection of DC equipment with any power end; when the storage battery is under polarity reversal connection state, no leakage current is caused, and no damage can be caused to the battery.
Description
Technical field
The utility model relates to battery charging circuit technical field, relates to particularly a kind of circuit for reverse connection of accumulator protection.
Background technology
Battery is the device of a kind of Conversion of Energy and storage, and it is converted into electric energy by reaction by chemical energy or physical energy.Battery is a kind of chemical power source, and it forms respectively both positive and negative polarity by the electrochemical activity electrode of two kinds of heterogeneities, and unit positive charge moves on to the anodal electric current that forms by negative pole by inside battery.Battery gets final product generation current after making, but need to carry out recharging after discharge off, can continue to use.Conventionally charging circuit only can be controlled charging voltage and charging current loop; when accumulator polarity reversal connection; its opposite voltage tends to damage charging device, if do not have, finds in time and power consumption equipment is protected, and power consumption equipment may be damaged.
Therefore, a kind of reliable, low-loss storage battery reverse connection protection circuit of design has great importance.For most storage battery reverse connection protection circuit, be substantially all to carry out protection to error-polarity connection by counnter attack diode and relay mode at present.Although this method can play anti-reaction when battery polar reversal connection, but owing to failing to isolate completely, it all can produce pressure drop on diode, if failed for a long time, find and process in time, storage battery can, because larger leakage current causes over-discharge can, even damage battery.
Utility model content
For this reason, technical problem to be solved in the utility model is: a kind of novel circuit for storage battery isolation reverse connecting protection is provided, overcomes the shortcoming of above-mentioned employing diode and relay mode.
So the utility model provides following technical scheme:
A kind of circuit for storage battery isolation reverse connecting protection, comprise MCU controller, input polarity discriminating circuit, cell voltage feedback circuit, every anti-metal-oxide-semiconductor drive circuit, every anti-metal-oxide-semiconductor circuit, charging metal-oxide-semiconductor drive circuit and charging metal-oxide-semiconductor circuit, the described input polarity discriminating circuit of the anodal connection of input of charge power supply, described input polarity discriminating circuit successively through described every anti-metal-oxide-semiconductor circuit, charging metal-oxide-semiconductor circuit and described cell voltage feedback circuit are connected to the positive pole of storage battery, described input polarity discriminating circuit and described cell voltage feedback circuit feed back to feedback signal respectively described MCU controller, described MCU controller according to described in feedback signal control every anti-metal-oxide-semiconductor drive circuit and described charging metal-oxide-semiconductor drive circuit, described described every anti-metal-oxide-semiconductor circuit every anti-metal-oxide-semiconductor drive circuit driving control, described charging metal-oxide-semiconductor drive circuit drives controls described charging metal-oxide-semiconductor circuit.
Particularly, describedly every anti-metal-oxide-semiconductor drive circuit, by the first photoelectrical coupler, received from the driving signal of MCU controller, and then control the described turn-on and turn-off every anti-metal-oxide-semiconductor circuit.
Particularly, described charging metal-oxide-semiconductor circuit receives the driving signal from MCU controller by the second photoelectrical coupler, and then controls the turn-on and turn-off of charging metal-oxide-semiconductor circuit.
Particularly, described input polarity discriminating circuit, through diode clamp, delivers to the A/D thief hatch of described MCU controller after being sampled by divider resistance.
Storage battery isolation reverse-connection protection circuit of the present utility model; effectively controlled the curent change of charge in batteries moment circuit; reduce the impact of charge in batteries on other element in circuit; when reverse connection of accumulator; every the not conducting of anti-metal-oxide-semiconductor circuit, circuit is not worked, and has avoided the opposite voltage of storage battery to the infringement of other element; thereby whole circuit is played a protective role, send index signal simultaneously and remind operating personnel.When storage battery connects when normal, every anti-metal-oxide-semiconductor circuit turn-on, himself lower conduction voltage drop has also reduced from loss simultaneously.By utilizing metal-oxide-semiconductor drain-source utmost point two ends under off state to be open circuit isolation, lower conduction voltage drop under conducting state has also reduced device own loss when playing protection.
Therefore,, than prior art, there is following features:
Simple in structure, cost is low, practical, stability is strong, can be applicable to the anti-reverse protection of DC equipment of any power end.
2. when storage battery is in error-polarity connection state lower time, the utility model is than the method for existing employing diode and relay counnter attack, and the utility model adopts metal-oxide-semiconductor buffer circuit, and leakage current, can not cause damage to battery.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of embodiment storage battery isolation reverse-connection protection circuit.
Embodiment
Below, by reference to the accompanying drawings the utility model is described in detail.
The present embodiment is input as example also in conjunction with the accompanying drawings with solar recharging, solar recharging input is accessed by power supply input positive pole and power supply input negative pole, power supply input anodal through input polarity discriminating circuit 2 detection signals and by signal feedback to MCU controller, when polarity detection access is normal, MCU controller drives signal to set high on the A road every anti-metal-oxide-semiconductor drive circuit 1, and this forms drive circuit loop.
The driving signal of the self-driven current-limiting resistance R2 of metal-oxide-semiconductor Q1 origin in anti-metal-oxide-semiconductor circuit 3 carries out conducting, and when driving signal to set low, metal-oxide-semiconductor Q1 discharges junction capacitance in metal-oxide-semiconductor Q1 rapidly by earth resistance R1.When input polarity discriminating circuit 2 detects solar energy input error-polarity connection, MCU controller drives signal to set low on the A road in anti-metal-oxide-semiconductor drive circuit 1, and metal-oxide-semiconductor Q1 turn-offs and is open-circuit condition, and now solar energy is inputted with accumulator terminal in isolation.
The driving signal of the self-driven current-limiting resistance R4 of metal-oxide-semiconductor Q2 origin in charging metal-oxide-semiconductor circuit 4 carries out conducting, and when driving signal to set low, metal-oxide-semiconductor Q2 discharges junction capacitance in metal-oxide-semiconductor Q2 rapidly by earth resistance R3.When input polarity discriminating circuit 2 detects solar energy input error-polarity connection, B road in charging metal-oxide-semiconductor circuit 4 drives signal to set low, metal-oxide-semiconductor Q2 turn-offs and is open-circuit condition, now the inner fly-wheel diode of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 be reverse anti-opposite state cannot conducting.
In anti-metal-oxide-semiconductor circuit 3 when solar energy input polarity is correct, metal-oxide-semiconductor Q1 conducting.When solar voltage is during higher than battery, cell voltage feedback circuit 6 carries out PWM pulse-width adjustment according to current cell voltage, and PWMB is the pulse width modulated drive signal that MCU controller sends, and all fills conversion according to cell voltage feedback simultaneously.
The specific works process of the utility model circuit is as follows:
In the situation that power supply is inputted both positive and negative polarity at error-polarity connection, by input polarity discriminating circuit 2, input error-polarity connection detected, MCU controller drives signal and PWMB road to drive signal to set low level on PWMA road like this, this low level makes metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 in off state, power input and battery-end, in isolation reversal connection state, can not damaged input power and power consumption equipment.When power supply input both positive and negative polarity connects in normal situation in polarity, by input polarity discriminating circuit 2, detect that input polarity is normal, MCU controller control signal drives signal to set high level on PWMA road like this, and this low level makes metal-oxide-semiconductor in conducting state.MCU controller is according to the battery voltage sampling signal of cell voltage feedback circuit 6 simultaneously; controlling PWMB road drives signal to carry out PWM pulse-width modulation; guarantee can, to accumulator super-charge, effectively not protect power consumption equipment and storage battery when input power polarity is correct.
The storage battery isolation reverse-connection protection circuit of the present embodiment is simple in structure, good stability, practical, can be widely used in the storage battery of other type.Also can be applied in the circuit of storage battery isolation reverse connecting protection of AC-DC and DC-AC power conversion.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (4)
1. the circuit for storage battery isolation reverse connecting protection, it is characterized in that: comprise MCU controller, input polarity discriminating circuit, cell voltage feedback circuit, every anti-metal-oxide-semiconductor drive circuit, every anti-metal-oxide-semiconductor circuit, charging metal-oxide-semiconductor drive circuit and charging metal-oxide-semiconductor circuit, the described input polarity discriminating circuit of the anodal connection of input of charge power supply, described input polarity discriminating circuit successively through described every anti-metal-oxide-semiconductor circuit, charging metal-oxide-semiconductor circuit and described cell voltage feedback circuit are connected to the positive pole of storage battery, described input polarity discriminating circuit and described cell voltage feedback circuit feed back to feedback signal respectively described MCU controller, described MCU controller according to described in feedback signal control every anti-metal-oxide-semiconductor drive circuit and described charging metal-oxide-semiconductor drive circuit, described described every anti-metal-oxide-semiconductor circuit every anti-metal-oxide-semiconductor drive circuit driving control, described charging metal-oxide-semiconductor drive circuit drives controls described charging metal-oxide-semiconductor circuit.
2. the circuit for storage battery isolation reverse connecting protection according to claim 1; it is characterized in that: describedly every anti-metal-oxide-semiconductor drive circuit, by the first photoelectrical coupler, received from the driving signal of MCU controller, and then control the described turn-on and turn-off every anti-metal-oxide-semiconductor circuit.
3. the circuit for storage battery isolation reverse connecting protection according to claim 1, is characterized in that: described charging metal-oxide-semiconductor circuit receives the driving signal from MCU controller by the second photoelectrical coupler, and then controls the turn-on and turn-off of charging metal-oxide-semiconductor circuit.
4. the circuit for storage battery isolation reverse connecting protection according to claim 1, is characterized in that: described input polarity discriminating circuit, after being sampled by divider resistance, through diode clamp, deliver to the A/D thief hatch of described MCU controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320615151.9U CN203553933U (en) | 2013-09-30 | 2013-09-30 | Circuit for storage battery isolation reversal connection protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320615151.9U CN203553933U (en) | 2013-09-30 | 2013-09-30 | Circuit for storage battery isolation reversal connection protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203553933U true CN203553933U (en) | 2014-04-16 |
Family
ID=50472002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320615151.9U Expired - Fee Related CN203553933U (en) | 2013-09-30 | 2013-09-30 | Circuit for storage battery isolation reversal connection protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203553933U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108583322A (en) * | 2018-04-18 | 2018-09-28 | 南京越博动力系统股份有限公司 | The anti-reverse method of new-energy automobile five in one controller and its device |
-
2013
- 2013-09-30 CN CN201320615151.9U patent/CN203553933U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108583322A (en) * | 2018-04-18 | 2018-09-28 | 南京越博动力系统股份有限公司 | The anti-reverse method of new-energy automobile five in one controller and its device |
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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: 20140416 Termination date: 20170930 |