CN110509772A - Accessory power supply - Google Patents
Accessory power supply Download PDFInfo
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- CN110509772A CN110509772A CN201810497126.2A CN201810497126A CN110509772A CN 110509772 A CN110509772 A CN 110509772A CN 201810497126 A CN201810497126 A CN 201810497126A CN 110509772 A CN110509772 A CN 110509772A
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- power supply
- accessory power
- voltage
- connects
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- 230000005669 field effect Effects 0.000 claims abstract description 49
- 239000003381 stabilizer Substances 0.000 claims description 22
- 230000005611 electricity Effects 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of accessory power supplys, the accessory power supply is located in an electric car A-battery power supply system, the electric car A-battery power supply system further includes battery and power inverter, wherein: the battery includes a positive output end and negative output terminal, and the positive output end provides the first power supply for the accessory power supply；The accessory power supply converts first power supply, forms second source, and the second source is provided to the power inverter；The accessory power supply includes a field effect transistor, and the field effect transistor is controlled by the voltage magnitude of the second source, the operation of on or off is carried out, to control conducting and disconnection between the positive output end and first power supply.
Description
Technical field
The present invention relates to electric vehicle engineering field, in particular to a kind of accessory power supply.
Background technique
Currently, electric car low-pressure system generallys use 12V battery power supply system, power for vehicle low-voltage electronic equipment.
Therefore, vehicle low-voltage electronic equipment or power inverter generally require to take electricity from A-battery, to constitute itself accessory power supply.
Such accessory power supply is usually by flyback circuit, Boost circuit, and Buck-Boost circuit or LDO are constituted, and need to have battery
Stable and efficient output voltage under anti-reverse and adaptation battery voltage ripple.
Anti-reverse diode need to be sealed in accessory power supply input terminal by commonly using battery powered accessory power supply scheme, such as Fig. 1 institute
Show, electric car low-pressure system includes battery 101, low voltage electric power system 102, load 103, specifically, low voltage electric power system packet
Include accessory power supply 102A, controller 102B, signal sample circuit 102C；Power inverter 102D；Accessory power supply 102A is control
Device 102B provides power supply Vo1, provides voltage Vo2 for signal sample circuit 102C, provides power supply Vo3 for power inverter 102D.
Wherein, D100, that is, anti-reverse diode, the positive output end B+ of anode connection battery, cathode connect accessory power supply 102A.It should
Mode can effectively carry out cell anti-reverse and connect, but when cell voltage is lower, the increase of input current, so that anti-reverse diode
Conduction voltage drop caused by loss do not allow it is ignored.The efficiency for reducing accessory power supply reduces the whole of entire power converter
Body efficiency or the loss for increasing low-voltage electronic equipment.
Summary of the invention
The purpose of the present invention is to provide a kind of accessory power supplys, and to solve, existing battery power supply system loss is biggish to be asked
Topic.
In order to solve the above technical problems, the present invention provides a kind of accessory power supply, the accessory power supply is located at an electric car
In A-battery power supply system, the electric car A-battery power supply system further includes battery and power inverter, in which: institute
Stating battery includes a positive output end and negative output terminal, and the positive output end provides the first power supply for the accessory power supply；
The accessory power supply converts first power supply, forms second source, and the second source is provided
To the power inverter；
The accessory power supply includes a field effect transistor, and the field effect transistor is by the voltage amplitude of the second source
Value control, carries out the operation of on or off, to control conducting and disconnection between the positive output end and first power supply.
Optionally, in the accessory power supply, the accessory power supply further includes a voltage-stabiliser tube, the anode of the voltage-stabiliser tube
The positive output end is connected, the cathode of the voltage-stabiliser tube connects the grid of the field effect transistor.
Optionally, in the accessory power supply, the accessory power supply further includes that cell anti-reverse connects circuit, and the battery is anti-
Reversal connection circuit includes first resistor, second resistance and a triode, and described first resistor one end connects second source, and the other end connects
Second resistance, the other end ground connection of the second resistance are connect, the base stage of the triode is connected to first resistor and second resistance
Junction, the emitter ground connection of the triode, the collector of the triode connects the grid of the field effect transistor.
Optionally, in the accessory power supply, the accessory power supply further includes 3rd resistor, the 4th resistance, the 5th electricity
Resistance and the 6th resistance, in which:
The 3rd resistor is connected between the base stage and emitter of the triode；
Described 4th resistance one end connects the collector of the triode, and the other end connects the cathode of the voltage-stabiliser tube；
Described 5th resistance one end connects the positive output end, and the other end connects the cathode of the voltage-stabiliser tube；
6th resistance is connected between the anode and cathode of the voltage-stabiliser tube.
Optionally, in the accessory power supply, the accessory power supply further includes first diode and the second diode,
In:
The anode of the first diode connects the positive output end, the cathode connection the described 5th of the first diode
Resistance；
The anode of second diode connects the junction of the first resistor and second resistance, second diode
Cathode connect the base stage of the triode.
Optionally, in the accessory power supply, the field effect transistor is n type field effect transistor, three pole
Pipe is NPN type triode.
Optionally, in the accessory power supply, the negative output terminal ground connection.
Optionally, in the accessory power supply,
When the positive output end connects the accessory power supply, and the voltage of positive output end subtracts one surely lower than second source
When pressure value, field effect transistor conducting；
When the positive output end connects the accessory power supply, and the voltage of positive output end is higher than second source and subtracts one surely
When pressure value, field effect transistor shutdown.
Optionally, in the accessory power supply,
When the negative output terminal connects the accessory power supply, and positive output end is grounded, the field effect transistor shutdown.
Optionally, in the accessory power supply, the power inverter includes single-ended flyback DC-DC converter, rises
Buck chopper or low pressure difference linear voltage regulator.
In accessory power supply provided by the invention, by field effect transistor by the voltage magnitude control of the second source
System, carries out the operation of on or off, to control conducting and disconnection between the positive output end and first power supply, uses
Field effect transistor substitutes simple anti-reverse diode, solves the increase of input current when cell voltage is lower, so that
Larger problem is lost caused by the conduction voltage drop of anti-reverse diode.
Detailed description of the invention
Fig. 1 is existing electric car A-battery power supply system schematic diagram；
Fig. 2 is the electric car A-battery power supply system schematic diagram of one embodiment of the invention；
Fig. 3 is the accessory power supply schematic diagram of another embodiment of the present invention；
Fig. 4 is the accessory power supply schematic diagram of another embodiment of the present invention；
It is as shown in the figure:
The prior art: 101- battery；102- low voltage electric power system；102A- accessory power supply；102B- controller；102C- letter
Number sample circuit；102D- power inverter；103- load；
The present invention: 201- battery；202- low voltage electric power system；202A- accessory power supply；202B- controller；202C- signal
Sample circuit；202D- power inverter；The control device of 2021- power inverter；203- load；204- field effect transistor.
Specific embodiment
Accessory power supply proposed by the present invention is described in further detail below in conjunction with the drawings and specific embodiments.Under
Face explanation and claims, advantages and features of the invention will become apparent from.It should be noted that attached drawing is all made of very simplification
Form and use non-accurate ratio, only for the purpose of facilitating and clarifying the purpose of the embodiments of the invention.
Core of the invention thought is to provide a kind of accessory power supply, larger to solve existing battery power supply system loss
The problem of.
To realize above-mentioned thought, the present invention provides a kind of accessory power supply, it is low that the accessory power supply is located at an electric car
In piezoelectric battery power supply system, the electric car A-battery power supply system further includes the Low-voltage Electronics such as battery and power inverter
Equipment, in which: the battery includes a positive output end and negative output terminal, and the positive output end provides first for the accessory power supply
Power supply；The accessory power supply converts first power supply, forms second source, and the second source is provided to institute
State low-voltage electronic equipment and the power inverter；The accessory power supply includes a field effect transistor, the field effect transistor
Pipe is controlled by the voltage magnitude of the second source, carries out the operation of on or off, with control the positive output end with it is described
Conducting and disconnection between first power supply.
The present embodiment provides a kind of accessory power supply, the accessory power supply is located at an electric car A-battery power supply system
In, the electric car A-battery power supply system is located in electric car low-pressure system, as shown in Fig. 2, electric car low pressure
System includes battery 201, low voltage electric power system 202, load 203, specifically, low voltage electric power system 202 includes accessory power supply
202A, controller 202B, signal sample circuit 202C, power inverter 202D；Accessory power supply 202A provides for controller 202B
Power supply Vo1, provides voltage Vo2 for signal sample circuit 202C, provides power supply Vo3 for power inverter 202D.Battery 201 has
Positive output end B+ and negative output terminal B-.
The electric car A-battery power supply system includes 202 (low voltage electric power system of battery 201 and low voltage electric power system
202 be accessory power supply 202A and low-voltage electronic equipment, and the low-voltage electronic equipment is controller 202B, signal sample circuit
202C and power inverter 202D etc.), in which: the battery 201 includes a positive output end B+ and negative output terminal B-, described just defeated
Outlet B+ provides the first power supply Vin for the accessory power supply 202A；
The accessory power supply 202A converts the first power supply Vin, formation second source Vo (including Vo1, Vo2
With Vo3 etc.), and the second source Vo is provided to the low-voltage electronic equipment (such as shown in Fig. 2, accessory power supply 202A is
Controller 202B provides power supply Vo1, provides voltage Vo2 for signal sample circuit 202C, provides power supply for power inverter 202D
Vo3) and the field effect transistor 204 (such as shown in Fig. 3, accessory power supply 202A be field effect transistor 204 provide sampling electricity
Press Vo1, or Vo2 or Vo3)；
The accessory power supply 202A includes a field effect transistor M 1 (i.e. 204 in Fig. 2), the field effect transistor M 1
It is controlled by the voltage magnitude of the second source Vo, carries out the operation of on or off, to control the positive output end B+ and institute
State the conducting and disconnection between the first power supply Vin.By field effect transistor M 1 by the voltage magnitude control of the second source Vo
System, carries out the operation of on or off, leads on and off between the positive output end B+ and the first power supply Vin to control
It opens, substitutes simple anti-reverse diode using field effect transistor M 1, solve when cell voltage is lower, input current
Increase, so that larger problem is lost caused by the conduction voltage drop of anti-reverse diode.
As shown in figs. 34, in the accessory power supply, the accessory power supply 202A further includes a voltage-stabiliser tube D3, described
The anode of voltage-stabiliser tube D3 connects the positive output end B+, and the cathode of the voltage-stabiliser tube D3 connects the grid of the field effect transistor M 1
Pole, the accessory power supply 202A further include that cell anti-reverse connects circuit, and it includes first resistor R1, second that the cell anti-reverse, which connects circuit,
A resistance R2 and triode M2, the one end the first resistor R1 connect second source Vo (using Vo1 as example in Fig. 3~4), separately
One end connects second resistance R2, the other end ground connection of the second resistance R2, and the base stage of the triode M2 is connected to the first electricity
The junction of R1 and second resistance R2, the emitter ground connection of the triode M2 are hindered, the collector of the triode M2 connects institute
State the grid of field effect transistor M 1.
Specifically, the accessory power supply 202A further includes 3rd resistor R3, the 4th resistance R4, the electricity of the 5th resistance R5 and the 6th
Hinder R6, in which: the 3rd resistor R3 is connected between the base stage and emitter of the triode M2, and 3rd resistor R3 can make three
Voltage between the base stage and emitter of pole pipe M2 keeps stablizing, so that triode M2 stablizes on or off；4th electricity
Resistance one end R4 connects the collector of the triode M2, and the other end connects the cathode of the voltage-stabiliser tube D3, and the 4th resistance R4 can be with
Make triode M2 conducting electric current will not overcurrent, protect triode M2；Described 5th one end resistance R5 connects the positive output end B
+, the other end connects the cathode of the voltage-stabiliser tube D3, and the 5th resistance R5 plays the work divided between voltage-stabiliser tube D3 and second source Vo
With being clashed to avoid the voltage between voltage-stabiliser tube D3 cathode and second source Vo；The 6th resistance R6 is connected to described
Between the anode and cathode of voltage-stabiliser tube D3, the 6th resistance R6 protects voltage-stabiliser tube D3, prevents its breakdown.
Further, in the accessory power supply, the accessory power supply 202A further includes first diode D1 and second
Diode D2, in which: the anode of the first diode D1 connects the positive output end B+, the cathode of the first diode D1
Connect the 5th resistance R5；The anode of the second diode D2 connects the connection of the first resistor R1 and second resistance R2
Place, the cathode of the second diode D2 connect the base stage of the triode M2.
The field effect transistor M 1 is n type field effect transistor, and the triode M2 is NPN type triode.Normal
Under working condition, the negative output terminal B- ground connection, accessory power supply 202A connection positive output end B+.It is as shown in Figure 3:
When the positive output end B+ connection accessory power supply 202A (i.e. under the normal operation), and positive output end B+
Voltage VB+ lower than second source Vo1 subtract a pressure stabilizing value when, field effect transistor M 1 be connected, the pressure stabilizing value be voltage-stabiliser tube
Pressure stabilizing value Vz adds the threshold voltage vt h of field effect transistor M 1, it may be assumed that
When VB+ < Vo1-Vz-Vth, field effect transistor M 1 is connected；
When the positive output end B+ connection accessory power supply 202A (i.e. under the normal operation), and positive output end B+
Voltage VB+ be higher than second source Vo1 when subtracting the pressure stabilizing value, field effect transistor M 1 turns off, it may be assumed that
When VB+ > Vo1-Vz-Vth, field effect transistor M 1 is turned off.
It can be seen that in normal operating conditions, accessory power supply 202A is by sampling second source, and according to adopting
Sample as a result, control field effect transistor M1 turn-on and turn-off, can the output voltage VB+ to battery carry out certain tune
Section, to stablize the output of battery, when load excessive or it is too small when, the adjustment effect can make battery output adapt to load need
It asks.
When the negative output terminal B- connection accessory power supply 202A, positive output end B+ ground connection (i.e. in the case of battery reversal connection)
When, the level of voltage VB+ is zero, it is equivalent to the emitter ground connection of triode M2, since the voltage of Vo1 is not entirely zero, because
This is divided to the junction of first resistor R1 and second resistance R2, has certain high level, three poles at the base stage of triode M2
Pipe M2 is connected, then the grounded collector of triode M2, the i.e. grounded-grid of field effect transistor M1, the field effect transistor M 1
Shutdown, it is preferred that in order to keep the shutdown of field effect transistor M 1 more thorough, the conducting voltage of triode M2 is lower than field effect transistor
The threshold voltage of pipe M1.Cell anti-reverse meets circuit 204A and can prevent from working as the negative output terminal B- connection accessory power supply
When 202A, positive output end B+ ground connection (i.e. in the case of battery reversal connection), the electric current in accessory power supply continuously forms circuit (specific feelings
Condition: field effect transistor M 1 continues to be connected, then the main coil N1 of Vin transformer device structure along Fig. 3 to ground, i.e. the end B+ forms electric current
Circuit, and the current loop can send energy to secondary coil N2, Vo1 is arrived along first diode D1, the 5th resistance R5, voltage-stabiliser tube D3
Ground, the i.e. end B+ form current loop).
The power inverter includes single-ended flyback DC-DC converter (as shown in figure 4, single-ended flyback DC-DC is converted
Device includes first capacitor C1, the second capacitor C2, the first inductance L1, field effect transistor M 3 and M4 and control device 2021),
Buck-boost chopper (as shown in figure 3, buck-boost chopper is transformer device structure) or low pressure difference linear voltage regulator, it is preferred that auxiliary
It is one such for helping power supply 202A.
In accessory power supply provided by the invention, by field effect transistor M 1 by the voltage magnitude of the second source Vo
Control, carries out the operation of on or off, leads on and off between the positive output end B+ and the first power supply Vin to control
It opens, substitutes simple anti-reverse diode using field effect transistor M 1, solve when cell voltage is lower, input current
Increase, so that larger problem is lost caused by the conduction voltage drop of anti-reverse diode.
To sum up, the various configuration of accessory power supply is described in detail in above-described embodiment, and certainly, the present invention includes but not
Configuration cited by being confined in above-mentioned implementation, any content converted on the basis of configuration provided by the above embodiment,
Belong to the range that the present invention is protected.Those skilled in the art can draw inferences about other cases from one instance according to the content of above-described embodiment.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (10)
1. a kind of accessory power supply, the accessory power supply is located in an electric car A-battery power supply system, the electric car
A-battery power supply system further includes battery and power inverter, in which: and the battery includes a positive output end and negative output terminal,
The positive output end provides the first power supply for the accessory power supply；
It is characterized in that, the accessory power supply converts first power supply, second source is formed, and electric by described second
Source is provided to the power inverter；
The accessory power supply includes a field effect transistor, and the field effect transistor is by the voltage magnitude control of the second source
System, carries out the operation of on or off, to control conducting and disconnection between the positive output end and first power supply.
2. accessory power supply as described in claim 1, which is characterized in that the accessory power supply further includes a voltage-stabiliser tube, described steady
The anode of pressure pipe connects the positive output end, and the cathode of the voltage-stabiliser tube connects the grid of the field effect transistor.
3. accessory power supply as claimed in claim 2, which is characterized in that the accessory power supply further includes that cell anti-reverse connects circuit,
It includes first resistor, second resistance and a triode, second electricity of first resistor one end connection that the cell anti-reverse, which connects circuit,
Source, the other end connect second resistance, the other end ground connection of the second resistance, and the base stage of the triode is connected to first resistor
It is grounded with the emitter of the junction of second resistance, the triode, it is brilliant that the collector of the triode connects the field-effect
The grid of body pipe.
4. accessory power supply as claimed in claim 3, which is characterized in that the accessory power supply further includes 3rd resistor, the 4th electricity
Resistance, the 5th resistance and the 6th resistance, in which:
The 3rd resistor is connected between the base stage and emitter of the triode；
Described 4th resistance one end connects the collector of the triode, and the other end connects the cathode of the voltage-stabiliser tube；
Described 5th resistance one end connects the positive output end, and the other end connects the cathode of the voltage-stabiliser tube；
6th resistance is connected between the anode and cathode of the voltage-stabiliser tube.
5. accessory power supply as claimed in claim 4, which is characterized in that the accessory power supply further includes first diode and second
Diode, in which:
The anode of the first diode connects the positive output end, the cathode connection of the first diode the 5th electricity
Resistance；
The anode of second diode connects the junction of the first resistor and second resistance, and second diode is born
Pole connects the base stage of the triode.
6. accessory power supply as claimed in claim 4, which is characterized in that the field effect transistor is n type field effect transistor,
The triode is NPN type triode.
7. accessory power supply as described in claim 1, which is characterized in that the negative output terminal ground connection.
8. accessory power supply as described in claim 1, which is characterized in that
When the positive output end connects the accessory power supply, and the voltage of positive output end subtracts a pressure stabilizing value lower than second source
When, field effect transistor conducting；
When the positive output end connects the accessory power supply, and the voltage of positive output end is higher than second source and subtracts a pressure stabilizing value
When, field effect transistor shutdown.
9. accessory power supply as described in claim 1, which is characterized in that
When the negative output terminal connects the accessory power supply, and positive output end is grounded, the field effect transistor shutdown.
10. accessory power supply as described in claim 1, which is characterized in that the power inverter includes single-ended flyback DC-DC
Converter, buck-boost chopper or low pressure difference linear voltage regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810497126.2A CN110509772A (en) | 2018-05-22 | 2018-05-22 | Accessory power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810497126.2A CN110509772A (en) | 2018-05-22 | 2018-05-22 | Accessory power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110509772A true CN110509772A (en) | 2019-11-29 |
Family
ID=68622331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810497126.2A Pending CN110509772A (en) | 2018-05-22 | 2018-05-22 | Accessory power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110509772A (en) |
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| CN103683264A (en) * | 2012-08-30 | 2014-03-26 | 深圳市海洋王照明工程有限公司 | Circuit for preventing reverse plug in of direct current power supply and lamp |
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| CN104377685A (en) * | 2014-12-04 | 2015-02-25 | 安徽巨一自动化装备有限公司 | Motor controller anti-reverse-connection and anti-back-flow redundancy power supply circuit for electric car |
| CN204481520U (en) * | 2015-03-19 | 2015-07-15 | 宁波波导软件有限公司 | A kind of storage battery of built-in GSM/GPS module |
| CN205248774U (en) * | 2015-12-04 | 2016-05-18 | 广州金升阳科技有限公司 | Reverse -connection protective circuit is prevented in input |
| CN206135717U (en) * | 2016-03-22 | 2017-04-26 | 昆明物理研究所 | Protect high -power system device's voltage output controlling means |
| CN106965761A (en) * | 2016-01-13 | 2017-07-21 | 厦门雅迅网络股份有限公司 | A kind of mobile unit system cut-off protection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101872971A (en) * | 2010-07-02 | 2010-10-27 | 北京星网锐捷网络技术有限公司 | Reverse-connection preventing circuit, reverse-connection preventing processing method and communication equipment |
| CN102082430A (en) * | 2011-01-27 | 2011-06-01 | 广州金升阳科技有限公司 | Surge suppression circuit |
| CN202218012U (en) * | 2011-07-29 | 2012-05-09 | 洛阳隆盛科技发展公司 | Power supply having reversal connection protection function |
| CN103683264A (en) * | 2012-08-30 | 2014-03-26 | 深圳市海洋王照明工程有限公司 | Circuit for preventing reverse plug in of direct current power supply and lamp |
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| CN104377685A (en) * | 2014-12-04 | 2015-02-25 | 安徽巨一自动化装备有限公司 | Motor controller anti-reverse-connection and anti-back-flow redundancy power supply circuit for electric car |
| CN204481520U (en) * | 2015-03-19 | 2015-07-15 | 宁波波导软件有限公司 | A kind of storage battery of built-in GSM/GPS module |
| CN205248774U (en) * | 2015-12-04 | 2016-05-18 | 广州金升阳科技有限公司 | Reverse -connection protective circuit is prevented in input |
| CN106965761A (en) * | 2016-01-13 | 2017-07-21 | 厦门雅迅网络股份有限公司 | A kind of mobile unit system cut-off protection device |
| CN206135717U (en) * | 2016-03-22 | 2017-04-26 | 昆明物理研究所 | Protect high -power system device's voltage output controlling means |
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Application publication date: 20191129 |