CN204119025U - A kind of linear voltage dropping circuit for battery system - Google Patents
A kind of linear voltage dropping circuit for battery system Download PDFInfo
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- CN204119025U CN204119025U CN201420675961.8U CN201420675961U CN204119025U CN 204119025 U CN204119025 U CN 204119025U CN 201420675961 U CN201420675961 U CN 201420675961U CN 204119025 U CN204119025 U CN 204119025U
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- 230000009467 reduction Effects 0.000 claims abstract description 23
- 102100036285 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Human genes 0.000 claims abstract description 12
- 101000875403 Homo sapiens 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Proteins 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 14
- 230000000087 stabilizing effect Effects 0.000 claims description 14
- 230000005669 field effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
A kind of linear voltage dropping circuit for battery system, comprise diode D1, be provided with the two-stage reduction voltage circuit of output VDD1 and output VDD2, constant-current circuit is accessed between diode D1 and two-stage reduction voltage circuit, constant-current circuit comprises resistance R1 and the resistance R2 of rear access diode D1 in parallel, the other end of resistance R1 is connected with the input of switch element S1, the other end of the control end resistance R2 of switch element S1 connects, the output of switch element S1 is connected with resistance R3, the other end access two-stage reduction voltage circuit of resistance R3, connected node between resistance R2 with switch element S1 is connected with the input of switch element S2, connected node between the control end access resistance R3 of switch element S2 and the output of switch element S1, connected node between the output access resistance R3 of switch element S2 and two-stage reduction voltage circuit.It is low that the utility model has production cost, stable high, improves the electric energy conversion rate of battery pack, saves energy, makes output more stable, improve the quality of product.
Description
Technical field
The utility model belongs to cell system field, is specifically related to a kind of linear voltage dropping circuit for battery system.
Background technology
Because lithium battery has environmental protection, long service life, has the advantages such as high power ability to bear, voltage platform is high, energy storage density is large, and quality is light, make the technical fields such as its extensive use science and technology, national defence, life.At present, the application of multisection lithium battery group is increasingly extensive, in the application of a lot of lithium battery group, all need for control circuit provides a stable low-tension supply, for the work of control circuit, but in implementation process, due to battery voltage, obtain voltage phase difference when Full Charge Capacity is used up with electricity larger, therefore, for step-down circuit, because the significantly change of input voltage range, thus be Component selection, parameter designing, a lot of restriction is brought in cost control aspect.Such as the lithium ion battery bag of 14 strings, usually it allows operating voltage to be between 35V ~ 60V, for common step-down chip or device, be faced with a no small type selecting difficult problem, adopt step pressure reducing, except increasing cost, the performance for high-low pressure all can be variant, thus need in the design process to carry out careful debugging, bring many workloads to design work.Meanwhile, when traditional step-down circuit exists voltage height, power consumption electric current is large, and the shortcoming that when voltage is low, power consumption electric current is little, makes its problem such as in use electric current is inconsistent, and electric quantity consumption is large, reduce the conversion ratio of electric energy, restricts its development and applies.
Summary of the invention
In view of this, technical problem to be solved in the utility model is that a kind of cost is low, the few and linear voltage dropping circuit for battery system that stability is high of current drain.
In order to solve the problems of the technologies described above, the utility model adopts following scheme to realize: a kind of linear voltage dropping circuit for battery system, comprise diode D1, the two-stage reduction voltage circuit be connected with diode D1, two-stage reduction voltage circuit is provided with output VDD1 and output VDD2, a constant-current circuit is accessed between diode D1 and two-stage reduction voltage circuit, described constant-current circuit comprises resistance R1 and the resistance R2 of rear access diode D1 in parallel, the other end of resistance R1 is connected with the input of switch element S1, the other end of the control end resistance R2 of switch element S1 connects, the output of switch element S1 is connected with resistance R3, the other end access two-stage reduction voltage circuit of resistance R3, connected node between resistance R2 with switch element S1 is connected with the input of a switch element S2, connected node between the control end access resistance R3 of switch element S2 and the output of switch element S1, connected node between the output access resistance R3 of switch element S2 and two-stage reduction voltage circuit.
As improvement of the present utility model, described two-stage reduction voltage circuit comprises a switch element S3, the input of switch element S3 is connected with the connected node between the output of switch element S2 and resistance R3, a voltage stabilizing didoe Z1 is accessed between the input of switch element S3 and the connected node between the output of switch element S2 and resistance R3, an electric capacity C1 is accessed between the input and voltage stabilizing didoe of switch element S3, a resistance R4 is being accessed between the input and electric capacity C1 of switch element S3, the other end of resistance R4 is connected with the control end of switch element S3 afterwards and accesses the control end of step-down chip U1, the other end of voltage stabilizing didoe Z1, the other end of electric capacity C1 and the earth terminal of step-down chip U1 connect and access ground wire GND, an electric capacity C3 is accessed between the output of switch element S3 and electric capacity C4, a resistance R5 is accessed between the output of switch element S3 and electric capacity C3, resistance R5 and resistance R6 is connected in series, and the other end of the other end of resistance R6, the other end of electric capacity C3 and electric capacity C4 connects and accesses ground wire GND, connected node between resistance R5 and resistance R6 is connected with the reference edge of step-down chip U1, the control end of switch element S3 is connected with an electric capacity C2 with the connected node between resistance R4, the connected node between the other end access resistance R5 and resistance R6 of electric capacity C2, output VDD1 is arranged between the input of switch element S3 and the connected node between the output of switch element S2 and resistance R3, output VDD2 is arranged on the connected node that is connected between electric capacity C4 and the output of switch element S3.
As further improvement of the utility model, described electric capacity C1 and electric capacity C3 has been polar capacitor.
Further improve as of the present utility model, described switch element S1, switch element S2 and switch element S3 are NPN type triode or NPN type field effect transistor.
Compared with prior art, it is low that the utility model has production cost, stable high, adopt the mode that constant-current circuit and secondary reduction voltage circuit combine, solve the step-down circuit question that battery voltage excursion causes greatly, thus make the voltage of no matter battery pack be in high or low, its power consumption electric current is substantially consistent, decrease battery pack current drain in use few, improve the electric energy conversion rate of battery pack, saves energy, the current stabilization made, improve the stability of battery pack, make output more stable, improve the quality of product, protection power consumption equipment.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
In order to allow those skilled in the art understand the technical solution of the utility model better, below in conjunction with accompanying drawing, the utility model is further elaborated.
As shown in Figure 1, a kind of linear voltage dropping circuit for battery system, comprises diode D1, and the anode of diode D1 is connected with the cathode output end VBAT+ of battery pack, and the negative electrode of diode D1 is connected with two-stage reduction voltage circuit 1.A constant-current circuit 2 is accessed between the negative electrode and secondary reduction voltage circuit 1 of diode D1.This constant-current circuit comprises resistance R1, resistance R2, resistance R3, NPN type triode S1 and NPN type triode S2; Resistance R1 and resistance R2 is connected in parallel, resistance R1 is connected with the negative electrode of diode D1 with the one end after resistance R2 parallel connection, the other end of resistance R1 is connected with the collector electrode of NPN type triode S1, the emitter of NPN type triode S1 is connected with resistance R3, and the base stage of NPN type triode S1 is connected with the other end of resistance R2; The base stage of NPN type triode S1 is connected with the collector electrode of NPN type triode S2 with the connected node between resistance R2, connected node between the emitter of the base stage access NPN type triode S1 of NPN type triode S2 and resistance R2, the connected node between the emitter access resistance R3 of NPN type triode S2 and secondary reduction voltage circuit 1.
Secondary reduction voltage circuit 1 comprises a NPN type triode S3, the resistance R3 in the collector electrode access constant-current circuit 2 of NPN type triode S3 and the connected node between the emitter of NPN type triode S2; The base stage of NPN type triode S3 is connected with the control end of step-down chip U1, the earth terminal access ground wire GND of step-down chip U1; The emitter of NPN type triode S3 is connected with resistance C4, the other end access ground wire GND of resistance C4.A voltage stabilizing didoe Z1 is accessed between the collector electrode of NPN type triode S3 and constant-current circuit 2.Resistance R3 in the negative electrode access collector electrode of NPN type triode S3 of voltage stabilizing didoe Z1 and constant-current circuit 2 and between the connected node between the emitter of NPN type triode S2; Access one between the collector electrode of NPN type triode S3 and the negative electrode of voltage stabilizing didoe Z1 and have polar capacitor C1; Between the collector electrode having the positive pole access NPN type triode S3 of polar capacitor C1 and the negative electrode of voltage stabilizing didoe Z1; The earth terminal of the anode of voltage stabilizing didoe Z1, the negative pole having polar capacitor C1 and step-down chip U1 connects, and connects rear and accesses ground wire GND.The collector electrode of NPN type triode S3 and have between the positive pole of polar capacitor C1 and access a resistance R4, the connected node between the base stage of the other end access NPN type triode S3 of resistance R4 and the control end of step-down chip U1.Access one between the emitter of NPN type triode S3 and electric capacity C4 and have polar capacitor C3, between the emitter having the positive pole access NPN type triode S3 of polar capacitor C3 and electric capacity C4.The emitter of NPN type triode S3 and have between the positive pole of polar capacitor C3 and access a resistance R5, resistance R5 and resistance R6 is connected in series; The other end of the other end of electric capacity C4, the negative pole having polar capacitor C3, resistance R6 connects, access ground wire GND after connecting.Connected node between resistance R5 and resistance R6 is connected with the reference edge of step-down chip U1.Connected node between the base stage of NPN type triode S3 and the control end of step-down chip U1 is connected with an electric capacity C2, the connected node between the other end access resistance R5 and resistance R6 of electric capacity C2.Output VDD1 is arranged between the input of switch element S3 and the connected node between the output of switch element S2 and resistance R3, and output VDD1 is driving power, and this driving voltage can be connected with H bridge metal-oxide-semiconductor.Output VDD2 is arranged on the connected node that is connected between electric capacity C4 and the output of switch element S3, and output VDD2 is output voltage terminal, this output voltage terminal can with electricity frequently transducer be connected.
Described step-down chip U1 can use the step-down chip such as low-pressure linear pressurizer LDO, step-down chip MH6303, does not enumerate at this.
During use, after the anode of the battery pack of diode D1 and the cathode output end VBAT+ of battery pack connect, through the base stage of diode D1, resistance R2, NPN type triode, the electric current of battery pack flows into that emitter flows out, after resistance R3 to there being polar capacitor C1 to charge, now NPN type triode S1 opens, and the electric current of battery pack flows out from the inflow emitter of the collector electrode of NPN type triode, charge to there being polar capacitor C1 with larger electric current after resistance R3; When the electric current in circuit is after resistance R3, if the voltage drop on resistance R3 is greater than the beginning voltage of NPN type triode S2, now NPN type triode S2 conducting, and NPN type triode S1 disconnects, electric current on resistance R3 reduces, and NPN type triode S2 has disconnection; So repeatedly, then a constant-current source is similar to by the electric current on resistance R3.And the driving power of output VDD1 is by constant-current source, voltage stabilizing didoe Z1 and be made up of polar capacitor C1, the output voltage values of the driving power of output VDD1 is determined by voltage stabilizing didoe Z1.
When after VDD1 output voltage stabilization, carrying out second time step-down, the electric current after secondary step-down exports from output VDD2, for the circuit be connected with output VDD2 or components and parts.This secondary reduction voltage circuit is by resistance R4, resistance R5, resistance R6, NPN type triode S3, step-down chip U1, electric capacity C2, be made up of polar capacitor C3 and electric capacity C4.As shown in Figure 1, voltage in secondary reduction voltage circuit 1 is through resistance R5, by the reference edge of the Voltage Feedback of output VDD2 to step-down chip U1 after resistance R6 dividing potential drop, when the voltage of the reference edge of step-down chip U1 is lower than its threshold value (being generally 1.2V or 2.5V), the Uak of step-down chip U1 presents high-impedance state, wherein Uak presents the base stage that high-impedance state is triode Q3 in step-down chip, connected node between the control point three of electric capacity C2 and step-down chip U1 and be in high resistance state between step-down chip U1 earth terminal and the reference voltage level of Uak is generally 2.5V, now triode S1 is in conducting state, thus output VDD2 voltage starts to rise, otherwise, the Uak conducting of step-down chip U1, wherein Uak conducting be the base stage of triode Q3, electric capacity C2 and step-down chip U1 control point three between connected node and step-down chip U1 earth terminal between conducting, triode S1 is in off-state, and output VDD2 voltage starts to decline.Controlled conducting and the disconnection of triode S1 like this by step-down chip U1, make the output voltage of output VDD2 keep stable state, thus the voltage stabilizing reaching output VDD2 exports.The effect of the electric capacity C2 in accompanying drawing 1 is when the voltage fluctuation on output VDD1 is very large, the reference edge of step-down chip U1 is directly coupled to by electric capacity C2, thus prevent the influence of fluctuations output VDD2 of output VDD1, thus it is more stable that output VDD2 is exported.
Switch element S1 of the present utility model, switch element S2 and switch element S3, except can using NPN type triode, can also use NPN type field effect transistor to replace, other components and parts and annexation same as the previously described embodiments, this do not repeat set forth.
Above-described embodiment is only wherein specific implementation of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these apparent replacement forms all belong to protection range of the present utility model.
Claims (2)
1. the linear voltage dropping circuit for battery system, comprise diode D1, the two-stage reduction voltage circuit (1) be connected with diode D1, two-stage reduction voltage circuit (1) is provided with output VDD1 and output VDD2, it is characterized in that, a constant-current circuit (2) is accessed between diode D1 and two-stage reduction voltage circuit (1), described constant-current circuit (2) comprises resistance R1 and the resistance R2 of rear access diode D1 in parallel, the other end of resistance R1 is connected with the input of switch element S1, the other end of the control end resistance R2 of switch element S1 connects, the output of switch element S1 is connected with resistance R3, other end access two-stage reduction voltage circuit (1) of resistance R3, connected node between resistance R2 with switch element S1 is connected with the input of a switch element S2, connected node between the control end access resistance R3 of switch element S2 and the output of switch element S1, connected node between the output access resistance R3 of switch element S2 and two-stage reduction voltage circuit (1), described two-stage reduction voltage circuit (1) comprises a switch element S3, the input of switch element S3 is connected with the connected node between the output of switch element S2 and resistance R3, a voltage stabilizing didoe Z1 is accessed between the input of switch element S3 and the connected node between the output of switch element S2 and resistance R3, an electric capacity C1 is accessed between the input and voltage stabilizing didoe of switch element S3, a resistance R4 is being accessed between the input and electric capacity C1 of switch element S3, the other end of resistance R4 is connected with the control end of switch element S3 afterwards and accesses the control end of step-down chip U1, the other end of voltage stabilizing didoe Z1, the other end of electric capacity C1 and the earth terminal of step-down chip U1 connect and access ground wire GND, an electric capacity C3 is accessed between the output of switch element S3 and electric capacity C4, a resistance R5 is accessed between the output of switch element S3 and electric capacity C3, resistance R5 and resistance R6 is connected in series, and the other end of the other end of resistance R6, the other end of electric capacity C3 and electric capacity C4 connects and accesses ground wire GND, connected node between resistance R5 and resistance R6 is connected with the reference edge of step-down chip U1, the control end of switch element S3 is connected with an electric capacity C2 with the connected node between resistance R4, the connected node between the other end access resistance R5 and resistance R6 of electric capacity C2, output VDD1 is arranged between the input of switch element S3 and the connected node between the output of switch element S2 and resistance R3, output VDD2 is arranged on the connected node that is connected between electric capacity C4 and the output of switch element S3.
2. the linear voltage dropping circuit for battery system according to claim 1, is characterized in that, described electric capacity C1 and electric capacity C3 has been polar capacitor.
3.linear voltage dropping circuit for battery system according to claim 1 and 2, is characterized in that, described switch element S1, switch element S2 and switch element S3 are NPN type triode or NPN type field effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420675961.8U CN204119025U (en) | 2014-11-13 | 2014-11-13 | A kind of linear voltage dropping circuit for battery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420675961.8U CN204119025U (en) | 2014-11-13 | 2014-11-13 | A kind of linear voltage dropping circuit for battery system |
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| Publication Number | Publication Date |
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| CN204119025U true CN204119025U (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420675961.8U Expired - Fee Related CN204119025U (en) | 2014-11-13 | 2014-11-13 | A kind of linear voltage dropping circuit for battery system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934397A (en) * | 2020-09-17 | 2020-11-13 | 苏州赛芯电子科技有限公司 | Power supply circuit and electronic equipment |
| CN113162190A (en) * | 2021-05-10 | 2021-07-23 | 深圳市卓朗微电子有限公司 | Novel control circuit and method for lithium battery pack based on 0Z8952 chip |
-
2014
- 2014-11-13 CN CN201420675961.8U patent/CN204119025U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111934397A (en) * | 2020-09-17 | 2020-11-13 | 苏州赛芯电子科技有限公司 | Power supply circuit and electronic equipment |
| CN113162190A (en) * | 2021-05-10 | 2021-07-23 | 深圳市卓朗微电子有限公司 | Novel control circuit and method for lithium battery pack based on 0Z8952 chip |
| CN113162190B (en) * | 2021-05-10 | 2022-07-19 | 深圳市卓朗微电子有限公司 | Lithium battery pack control circuit and method based on 0Z8952 chip |
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| 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: 20150121 |