CN101064436A - Multi-string battery balanced circuit - Google Patents
Multi-string battery balanced circuit Download PDFInfo
- Publication number
- CN101064436A CN101064436A CN 200610040075 CN200610040075A CN101064436A CN 101064436 A CN101064436 A CN 101064436A CN 200610040075 CN200610040075 CN 200610040075 CN 200610040075 A CN200610040075 A CN 200610040075A CN 101064436 A CN101064436 A CN 101064436A
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- Prior art keywords
- voltage
- battery
- module
- control module
- compensating
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Abstract
A kind of multiple batteries balancing circuit fits for circuit of multiple batteries in series, it includes a voltage detecting module which is electric connected with the positive and negative pole of every battery to obtain voltage value of every voltage; the voltage detecting module is coupled to a comparing module, the comparing module receives multiple voltage values of the voltage detecting module, and compares the voltage value to obtain a minimum voltage value; the comparing module couples a control module, the control module is used to receive the minimum value, and the control module couples a compensating voltage source, and the control module includes several switches, two ends of these switches are separately electric connected with the battery and compensating voltage source, when the control module receives the minimum voltage value, the switch between the battery and compensating voltage source is closed. So, voltages between batteries can be balanced in compensating charging mode.
Description
[technical field]
The present invention is a kind of multi-string battery balanced circuit, but a kind of multi-string battery balanced circuit of saves energy particularly.
[background technology]
Fig. 1 is existing multi-string battery balanced circuit 100 ', and in the circuit that is connected in series applicable to a plurality of batteries, it comprises some power consumption circuit and a monitoring module 20 '.Wherein, each battery is provided with a power consumption circuit, with battery 11 ' is example, the positive pole of this battery 11 ' electrically connects an end of a resistance R 1, and the other end of resistance R 1 electrically connects the drain electrode of a fet Q1, and the source electrode of fet Q1 is electrically connected to the negative pole of battery 11 ', and in addition, the grid of fet Q1 is electrically connected on the monitoring module 20 '.
Suppose that monitoring module 20 ' monitors voltage on the battery 11 ' when being maximum voltage, can be with fet Q1 conducting, and make the power consumption closing of circuit, that is, make resistance R 1 heating, thereby discharge the electric energy on the battery 11 '.When there is imbalance in the voltage between a plurality of batteries, always have a power consumption circuit in work, the voltage between each battery reaches balance, and the work of the circuit that respectively consumes energy directly can cause waste of electric energy.
[summary of the invention]
But main purpose of the present invention is to provide a kind of multi-string battery balanced circuit of saves energy.
For reaching above-mentioned purpose, the invention provides a kind of multi-string battery balanced circuit, be applicable to that it comprises a detecting voltage module in the circuit that a plurality of batteries are connected in series, this detecting voltage module is electrically connected to the positive pole and the negative pole of each battery, to obtain the magnitude of voltage at each battery two ends; This detecting voltage module comparison module that is coupled, this comparison module receives the obtained a plurality of magnitudes of voltage of detecting voltage module, and makes comparisons to obtain a minimum voltage value; This comparison module control module that is coupled, this control module is in order to receive the minimum voltage value, and this control module compensating voltage source that is coupled, and comprise some diverter switches in this control module, the two ends of these diverter switches electrically connect battery and compensating voltage source respectively, after this control module receives the minimum voltage value, diverter switch between pairing battery of minimum voltage value and the compensating voltage source can be become closure from disconnection, so that form the closed-loop path between compensating voltage source and the pairing battery of minimum voltage value.
Compared to prior art, the present invention reaches balance by the mode of compensating charge with the voltage between each battery, and dissipative cell no longer is set in the balancing circuitry, thus saves energy.
[description of drawings]
Fig. 1 is the circuit block diagram of existing multi-string battery balanced circuit.
Fig. 2 is the circuit block diagram of multi-string battery balanced circuit of the present invention.
[embodiment]
See also shown in Figure 2, multi-string battery balanced circuit 100 of the present invention is applicable to that a plurality of batteries are (in present embodiment, be provided with 3 batteries altogether, i.e. first battery 11, second battery 12 and the 3rd battery 13) in the circuit that is connected in series, it comprises a detecting voltage module 20, this detecting voltage module 20 electrically is connected to first battery 11 respectively, the positive pole and the negative pole of second battery 12 and the 3rd battery 13, to obtain first battery 11, (magnitude of voltage of supposing first battery, 11 two ends is 3.8V to three magnitudes of voltage at second battery 12 and the 3rd battery 13 two ends, the magnitude of voltage at second battery, 12 two ends is 4.2V, and the magnitude of voltage at the 3rd battery 13 two ends is 4.2V); This detecting voltage module 20 couplings one comparison module 30, this comparison module 30 receive three obtained magnitudes of voltage of detecting voltage module 20, and three magnitudes of voltage are made comparisons to obtain a minimum voltage value; This comparison module 30 couplings one control module 40, this control module 40 is in order to receive minimum voltage value (i.e. the magnitude of voltage at first battery, 11 two ends), and this control module 40 couplings one compensating voltage source 50, and comprise some diverter switches 401 in this control module 40, the two ends of these diverter switches 401 electrically connect battery and compensating voltage source 50 respectively, after this control module 40 receives the minimum voltage value, diverter switch between first battery 11 and the compensating voltage source 50 401 can be become closure from disconnection, so that form the closed-loop path between the compensating voltage source 50 and first battery 11.So, just can carry out charge compensate, so that the magnitude of voltage of first battery 11 rises until reaching 4.2V by 50 pairs first batteries of compensating voltage source 11.
Claims (1)
1. multi-string battery balanced circuit is applicable to that it comprises a detecting voltage module in the circuit that a plurality of batteries are connected in series, and this detecting voltage module is electrically connected to the positive pole and the negative pole of each battery, to obtain the magnitude of voltage at each battery two ends; This detecting voltage module comparison module that is coupled, this comparison module receives the obtained a plurality of magnitudes of voltage of detecting voltage module, and makes comparisons to obtain a minimum voltage value; This comparison module control module that is coupled, this control module be in order to receiving the minimum voltage value, and comprise some diverter switches in this control module, and an end of these diverter switches is electrically connected to battery; It is characterized in that: this control module compensating voltage source that is coupled, and compensating voltage source is electrically connected to the other end of diverter switch, after this control module receives the minimum voltage value, diverter switch between pairing battery of minimum voltage value and the compensating voltage source can be become closure from disconnection, so that form the closed-loop path between compensating voltage source and the pairing battery of minimum voltage value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610040075 CN101064436A (en) | 2006-04-27 | 2006-04-27 | Multi-string battery balanced circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610040075 CN101064436A (en) | 2006-04-27 | 2006-04-27 | Multi-string battery balanced circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101064436A true CN101064436A (en) | 2007-10-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610040075 Pending CN101064436A (en) | 2006-04-27 | 2006-04-27 | Multi-string battery balanced circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN101064436A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102455398A (en) * | 2010-10-26 | 2012-05-16 | Oki半导体株式会社 | Semiconductor circuit, semiconductor device, method of diagnosing abnormality of wire |
| CN101499671B (en) * | 2008-02-01 | 2013-03-06 | 凹凸电子（武汉）有限公司 | Cell voltage conversion system, method and cell management system |
| CN103036264A (en) * | 2011-10-04 | 2013-04-10 | 株式会社牧田 | Battery pack for electric power tool |
| CN107623343A (en) * | 2016-07-15 | 2018-01-23 | 重庆无线绿洲通信技术有限公司 | The active equalization method and device of a kind of lithium ion battery |
-
2006
- 2006-04-27 CN CN 200610040075 patent/CN101064436A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499671B (en) * | 2008-02-01 | 2013-03-06 | 凹凸电子（武汉）有限公司 | Cell voltage conversion system, method and cell management system |
| CN102455398A (en) * | 2010-10-26 | 2012-05-16 | Oki半导体株式会社 | Semiconductor circuit, semiconductor device, method of diagnosing abnormality of wire |
| CN102455398B (en) * | 2010-10-26 | 2016-12-07 | 拉碧斯半导体株式会社 | Semiconductor circuit, semiconductor device and wiring abnormality diagnostic method |
| CN103036264A (en) * | 2011-10-04 | 2013-04-10 | 株式会社牧田 | Battery pack for electric power tool |
| CN103036264B (en) * | 2011-10-04 | 2014-12-03 | 株式会社牧田 | Battery pack for electric power tool |
| CN107623343A (en) * | 2016-07-15 | 2018-01-23 | 重庆无线绿洲通信技术有限公司 | The active equalization method and device of a kind of lithium ion battery |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |