CN103701320A - Circuit structure for voltage conversion between large-sized voltage battery pack and auxiliary power supply - Google Patents
Circuit structure for voltage conversion between large-sized voltage battery pack and auxiliary power supply Download PDFInfo
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- CN103701320A CN103701320A CN201310729305.1A CN201310729305A CN103701320A CN 103701320 A CN103701320 A CN 103701320A CN 201310729305 A CN201310729305 A CN 201310729305A CN 103701320 A CN103701320 A CN 103701320A
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- power supply
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- voltage battery
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Abstract
The invention discloses a circuit structure for voltage conversion between a large-sized voltage battery pack and an auxiliary power supply. The circuit structure comprises the large-sized voltage battery pack, a diode, an impedance resistor, a high-voltage MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor), a bias driving circuit and the auxiliary power supply which is used for supplying power to a power supply management system. The circuit structure is characterized in that the large-sized voltage battery pack, the diode and the impedance resistor are sequentially and serially connected to form a unidirectionally conducted direct-current circuit and the direct-current circuit is connected with a source of the high-voltage MOSFET; a grid of the high-voltage MOSFET is connected with the bias driving circuit; the grid and a drain of the high-voltage MOSFET are connected with an input end of the auxiliary power supply; the bias driving circuit is supplied with power through the large-sized voltage battery pack; a negative electrode of the large-sized voltage battery pack in the circuit, the bias driving circuit and the auxiliary power supply are respectively grounded. Since the circuit structure adopts the resistor and the MOSFET to form a voltage reduction circuit, the total voltage of the large-sized voltage battery pack can be reduced to a withstand voltage range of 3-10V which can be accepted by the auxiliary power supply.
Description
Technical field:
The present invention relates to power-supply management system, particularly a kind of circuit structure for voltage transitions between large-scale voltage battery group and accessory power supply.
Background technology:
As everyone knows, the required supply power voltage of battery management system is lower, often below 5V.For example, but the total voltage of large-sized battery pack is higher: electric bicycle is 36V, 48V, electric automobile is 400V etc.Therefore, how by the higher voltage transitions of battery pack for be applicable to the required low pressure of battery management system accessory power supply be exactly Major Systems design difficult point it.
Comparatively conventional method has 2 kinds at present:
1, in circuit, the extra Battery pack that uses is powered for accessory power supply; Although do like this, can directly deal with problems, in any case, for battery management system increases by one group for the independently accessory power supply of its power supply, can improve undoubtedly the cost of whole system.
2, in circuit, adopt the mode etc. of high pressure LDO (low dropout regulator, low pressure difference linear voltage regulator) or DC-DC conversion.Although these technology are relatively ripe, also possess certain effect, except increasing cost, can increase equally the loss of system.
Summary of the invention:
In order to solve the problems of the technologies described above, the invention provides a kind of circuit structure for voltage transitions between large-scale voltage battery group and accessory power supply.This circuit structure utilizes resistance and MOSFET to form reduction voltage circuit, and the total voltage of large-scale voltage battery group (as 36V, 48V or high voltage more) is dropped in withstand voltage scope 3～10V that accessory power supply can accept.
Concrete technical scheme of the present invention is as follows:
For a circuit structure for voltage transitions between large-scale voltage battery group and accessory power supply, comprise large-scale voltage battery group, diode, impedance resistance, high withstand voltage field effect transistor, bias drive circuit and the accessory power supply for powering to power-supply management system; It is characterized in that, described large-scale voltage battery group, diode and impedance resistance are followed in series to form the DC circuit of an one-way conduction, and access the source electrode of high withstand voltage field effect transistor; The grid access bias drive circuit of the withstand voltage field effect transistor of described height; The drain electrode of the withstand voltage field effect transistor of described height connects the input of accessory power supply; Described bias drive circuit is powered by large-scale voltage battery group; The power cathode of the large-scale voltage battery group in described circuit, bias drive circuit and accessory power supply be ground connection respectively.
In such scheme, the maximum working voltage U of described bias drive circuit
maxfor 100V, drive current I
t< 1mA.
In such scheme, the output current I of described bias drive circuit
outfor 100mA, output voltage U
outbetween 3V～10V.
In such scheme, the resistance of described impedance resistance is 100K Ω～1M Ω.
In such scheme, the withstand voltage field effect transistor of described height can proof voltage be 500V, can resistance to electric current be 1A.
In such scheme, described large-scale voltage battery group is in series by a plurality of battery cores.
In such scheme, described bias drive circuit any one battery core in large-scale voltage battery group group provides power supply.
In such scheme, the output of described accessory power supply is used for connecting battery management system.
Compared with prior art, circuit structure of the present invention has succinct reliable; Advantage low in energy consumption.This is because if adopt traditional approach, relates to the voltage of the whole Battery pack group of direct use one, can cause that battery core is unbalance, and high withstand voltage field effect transistor (MOSFET) is voltage-type device, and the loss of Bias can be ignored.In addition, the withstand voltage scope of MOSFET and resistance is very wide, can be up to 500V, so circuit is applied widely.
Accompanying drawing explanation:
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention.
Fig. 1 is the electrical block diagram for voltage transitions between large-scale voltage battery group and accessory power supply of the present invention.
Fig. 2 is the enforcement illustration of bias drive circuit in Fig. 1.
Embodiment:
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
As shown in Figure 1, circuit structure for voltage transitions between large-scale voltage battery group and accessory power supply of the present invention, it comprises large-scale voltage battery group 10, diode 20, impedance resistance 30 (resistance is 100K Ω～1M Ω), high withstand voltage field effect transistor 40 (can proof voltage be 500V, can resistance to electric current be 1A), bias drive circuit 50 (maximum working voltage U
maxfor 100V, drive current I
t< 1mA, output current I
outfor 100mA, output voltage U
outbetween 3V～10V) and for giving the accessory power supply 60 of power-supply management system 70 power supplies.
Wherein, large-scale voltage battery group 10, diode 20 and impedance resistance 30 are followed in series to form the DC circuit of an one-way conduction, and access the source electrode 41 of high withstand voltage field effect transistor 40.The grid 42 access bias drive circuit 50 of high withstand voltage field effect transistor 40.The drain electrode 43 of high withstand voltage field effect transistor 40 connects the input 61 of accessory power supply 60.The output 62 of accessory power supply 60 is used for connecting battery management system 70.The power cathode of the large-scale voltage battery group 10 in circuit, bias drive circuit 50 and accessory power supply 60 be ground connection respectively.
In addition, bias drive circuit 60 is powered by large-scale voltage battery group, because large-scale voltage battery group is by a plurality of battery core (battery core Cell_1, Cell_2, ... Cell_N) in series, bias drive circuit in large-scale voltage battery group group any one battery core 80 (Cell_#) power supply is provided.
Referring to accompanying drawing 2, because bias drive circuit is existing custom circuit structure, and the core of non-circuit structure of the present invention, in this example, by accompanying drawing 2, to enumerate its a kind of circuit structure and consult for those skilled in the art, particular content does not repeat at this.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (8)
1. for the circuit structure of voltage transitions between large-scale voltage battery group and accessory power supply, comprise large-scale voltage battery group, diode, impedance resistance, high withstand voltage field effect transistor, bias drive circuit and the accessory power supply for powering to power-supply management system; It is characterized in that, described large-scale voltage battery group, diode and impedance resistance are followed in series to form the DC circuit of an one-way conduction, and access the source electrode of high withstand voltage field effect transistor; The grid access bias drive circuit of the withstand voltage field effect transistor of described height; The drain electrode of the withstand voltage field effect transistor of described height connects the input of accessory power supply; Described bias drive circuit is powered by large-scale voltage battery group; The power cathode of the large-scale voltage battery group in described circuit, bias drive circuit and accessory power supply be ground connection respectively.
2. according to the circuit structure for voltage transitions between large-scale voltage battery group and accessory power supply of claim 1, it is characterized in that, described large-scale voltage battery group is in series by a plurality of battery cores.
3. according to the circuit structure for voltage transitions between large-scale voltage battery group and accessory power supply of claim 2, it is characterized in that, described bias drive circuit any one battery core in large-scale voltage battery group group provides power supply.
4. according to the circuit structure for voltage transitions between large-scale voltage battery group and accessory power supply of claim 1 or 2 or 3, it is characterized in that the maximum working voltage U of described bias drive circuit
maxfor 100V, drive current I
t< 1mA.
5. according to the circuit structure for voltage transitions between large-scale voltage battery group and accessory power supply of claim 1 or 2 or 3, it is characterized in that the output current I of described bias drive circuit
outfor 100mA, output voltage U
outbetween 3V～10V.
6. according to the circuit structure for voltage transitions between large-scale voltage battery group and accessory power supply of claim 1 or 2 or 3, it is characterized in that, the resistance of described impedance resistance is 100K Ω～1M Ω.
7. according to the circuit structure for voltage transitions between large-scale voltage battery group and accessory power supply of claim 1 or 2 or 3, it is characterized in that, the withstand voltage field effect transistor of described height can proof voltage be 500V, can resistance to electric current be 1A.
8. according to the circuit structure for voltage transitions between large-scale voltage battery group and accessory power supply of claim 1, it is characterized in that, the output of described accessory power supply is used for connecting battery management system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310729305.1A CN103701320A (en) | 2013-12-14 | 2013-12-14 | Circuit structure for voltage conversion between large-sized voltage battery pack and auxiliary power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310729305.1A CN103701320A (en) | 2013-12-14 | 2013-12-14 | Circuit structure for voltage conversion between large-sized voltage battery pack and auxiliary power supply |
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| CN103701320A true CN103701320A (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310729305.1A Pending CN103701320A (en) | 2013-12-14 | 2013-12-14 | Circuit structure for voltage conversion between large-sized voltage battery pack and auxiliary power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821539A (en) * | 2020-12-31 | 2021-05-18 | 科华恒盛股份有限公司 | Auxiliary power supply device and power supply system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001286129A (en) * | 2000-03-31 | 2001-10-12 | Toshiba Lighting & Technology Corp | Dc-dc converter unit |
| CN201392483Y (en) * | 2009-03-06 | 2010-01-27 | 惠州三华工业有限公司 | Voltage reducing type voltage stabilizing circuit |
-
2013
- 2013-12-14 CN CN201310729305.1A patent/CN103701320A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001286129A (en) * | 2000-03-31 | 2001-10-12 | Toshiba Lighting & Technology Corp | Dc-dc converter unit |
| CN201392483Y (en) * | 2009-03-06 | 2010-01-27 | 惠州三华工业有限公司 | Voltage reducing type voltage stabilizing circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821539A (en) * | 2020-12-31 | 2021-05-18 | 科华恒盛股份有限公司 | Auxiliary power supply device and power supply system |
| CN112821539B (en) * | 2020-12-31 | 2024-01-02 | 厦门科华数能科技有限公司 | Auxiliary power supply device and power supply system |
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Application publication date: 20140402 |