CN103066661A - Passive battery equalizer circuit - Google Patents
Passive battery equalizer circuit Download PDFInfo
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- CN103066661A CN103066661A CN2012105958056A CN201210595805A CN103066661A CN 103066661 A CN103066661 A CN 103066661A CN 2012105958056 A CN2012105958056 A CN 2012105958056A CN 201210595805 A CN201210595805 A CN 201210595805A CN 103066661 A CN103066661 A CN 103066661A
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- switch
- battery unit
- resistor
- circuit
- battery
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a passive battery equalizer circuit which comprises a first battery unit, a second battery unit, a first resistor, a second resistor, a first switch, a second switch, a detection circuit, a control circuit and a drive circuit. An anode of the second battery unit is connected with a cathode of the first battery unit, a first end of the first resistor is connected with an anode of the first battery unit, and a first end of the second resistor is connected with the anode of the second battery unit. A first end of the first switch is connected with a second end of the first resistor, a first end of the second switch is connected with a second end of the second resistor, a second end of the second switch is connected with a cathode of the second battery unit, and the first end of the second switch is connected with a second end of the first switch. The detection circuit is used for detecting voltage of the first battery unit and the second battery unit and outputting detection signals. The control circuit is used for receiving the detection signals and outputting control signals. The drive circuit is used for receiving the control signals and outputting drive signals to control the power on and power off of the first switch and the second switch. According to the passive battery equalizer circuit, service life of a battery pack can be prolonged.
Description
Technical field
The present invention relates to electronic applications, particularly a kind of battery equalizing circuit.
Background technology
In many circuit, often multiple batteries is composed in series battery pack and thinks that circuit provides working power.Yet, because the physical characteristic of each batteries in the battery pack be not quite similar such as temperature characterisitic, impedance operator, thereby the electric weight of the storage of each batteries is also not identical.This will be so that shorten the useful life of battery.
Summary of the invention
The present invention proposes a kind of passive battery equalizing circuit, and it is unequal to have solved in the prior art in the battery pack each battery unit electric weight, the problem that easily causes battery pack to shorten useful life.
Technical scheme of the present invention is achieved in that
A kind of passive battery equalizing circuit comprises the first battery unit and the second battery unit, and the anodic bonding of described the second battery unit is to the negative electrode of described the first battery unit; The first resistor and the second resistor, the first end of described the first resistor is connected to the anode of described the first battery unit, and the first end of described the second resistor is connected to the anode of described the second battery unit; The first switch and second switch, the first end of described the first switch is connected to the second end of described the first resistor, the first end of described second switch is connected to the second end of described the second resistor, the second end of described second switch is connected to the negative electrode of described the second battery unit, and the first end of described second switch is connected to the second end of described the first switch; Testing circuit, described testing circuit detect the voltage of described the first battery unit and described the second battery unit, and output detection signal; Control circuit, described control circuit receive described detection signal and export control signal; And drive circuit, described drive circuit receives described control signal and output drive signal to control the turn-on and turn-off of described the first switch and described second switch.
Alternatively, described the first switch and described second switch are MOSFET.
The invention has the beneficial effects as follows and adopt battery equalizing circuit can make the battery pack life.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of passive battery equalizing circuit schematic diagram of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 1 is a kind of passive battery equalizing circuit schematic diagram of the present invention.As shown in Figure 1, passive battery equalizing circuit 10 comprises battery unit C1, C2, resistor R1, R2, switch M1, M2.In addition, passive battery equalizing circuit 10 also comprises testing circuit 100, control circuit 200 and drive circuit 300.Wherein, the anodic bonding of battery unit C1 is to the first end of resistor R1, and the second end of resistor R1 is connected to the first end of switch M1.The anodic bonding of battery unit C2 is to the first end of resistor R2, and the second end of resistor R2 is connected to the first end of switch M2.The second end of switch M2 is connected to the negative electrode of battery unit C2.In addition, the anode of battery unit C2 also is connected to the negative electrode of battery unit C1, and the first end of switch M2 is connected to the second end of switch M1.As shown in Figure 1, testing circuit 100 detects the voltage at battery unit C1 and C2 two ends, and output detection signal is to control circuit 200.Control circuit 200 receives detection signal and outputs control signals to drive circuit 300.Drive circuit 300 reception control signals and output drive signal are with the turn-on and turn-off of control switch M1 and M2.
In ensuing description, take the electric weight of battery unit C2 greater than the electric weight of battery unit C1 as example, the operation principle of battery equalizing circuit 10 is described.Those skilled in the art should be appreciated that this principle is applicable equally greater than the situation of the electric weight of battery unit C2 for the electric weight of battery unit C1.
As shown in Figure 1, the electric weight that detects battery unit C2 when testing circuit 100 exports testing result to control circuit 200 during greater than the electric weight of battery unit C1, control circuit 200 control drive circuits 300, and with actuating switch M2, stopcock M1.After switch M2 conducting, battery unit C2 and resistor R2 form the closed-loop path, the electric current resistor R2 that flows through, resistor R2 produces heat energy and also dissipates, thereby so that the electric weight of battery unit C2 reduce.When testing circuit 100 detects electric weight among battery unit C1 and the battery unit C2 and equates, output detection signal is to control circuit 200, control circuit 200 control drive circuits 300, thereby so that switch M1 and M2 all turn-off, the loop disconnects, the no current resistor of flowing through, thus the electric weight among battery unit C1 and the C2 reaches equal.
As seen, by adopting battery equalizing circuit 10, electric weight unnecessary in the battery unit is dissipated by the form of resistor with heat, thereby so that the electric weight of each battery unit is equal, final so that the life of battery pack.
In the embodiment shown in fig. 1, switch M1 and M2 adopt MOSFET, yet those skilled in the art should be appreciated that in other embodiments switch M1 and M2 also can adopt other form.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a passive battery equalizing circuit is characterized in that, comprising:
The first battery unit and the second battery unit, the anodic bonding of described the second battery unit is to the negative electrode of described the first battery unit;
The first resistor and the second resistor, the first end of described the first resistor is connected to the anode of described the first battery unit, and the first end of described the second resistor is connected to the anode of described the second battery unit;
The first switch and second switch, the first end of described the first switch is connected to the second end of described the first resistor, the first end of described second switch is connected to the second end of described the second resistor, the second end of described second switch is connected to the negative electrode of described the second battery unit, and the first end of described second switch is connected to the second end of described the first switch;
Testing circuit, described testing circuit detect the voltage of described the first battery unit and described the second battery unit, and output detection signal;
Control circuit, described control circuit receive described detection signal and export control signal; And
Drive circuit, described drive circuit receive described control signal and output drive signal to control the turn-on and turn-off of described the first switch and described second switch.
2. passive battery equalizing circuit as claimed in claim 1 is characterized in that, described the first switch and described second switch are MOSFET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105958056A CN103066661A (en) | 2012-12-17 | 2012-12-17 | Passive battery equalizer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105958056A CN103066661A (en) | 2012-12-17 | 2012-12-17 | Passive battery equalizer circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103066661A true CN103066661A (en) | 2013-04-24 |
Family
ID=48109168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105958056A Pending CN103066661A (en) | 2012-12-17 | 2012-12-17 | Passive battery equalizer circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103066661A (en) |
-
2012
- 2012-12-17 CN CN2012105958056A patent/CN103066661A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130424 |